[RE-wrenches] PV+EV charging

[Andrew Truitt]

Wrenches,

This year's NABCEP conference will feature a panel session on PV+EV
charging, including topics such as the state of the market, relevant rate
tariffs/regulations/incentives, current equipment capabilities,
vehicle-to-grid considerations, key players in the space (e.g. Beam,
Enphase+ClipperCreek, 365 Pronto, ChargeNet...), and economic optimization.
Is anyone out there installing co-located and integrated PV+EV charging
right now? If so what equipment are you using and what challenges and
benefits are you seeing? Feel free to contact me off-list.


Regards,

Andrew Truitt
www.remotesolar.com
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132



"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough
___
List sponsored by Redwood Alliance

Pay optional member dues here: http://re-wrenches.org

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

There are two list archives for searching. When one doesn't work, try the other:
https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
http://www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
http://www.members.re-wrenches.org

Re: [RE-wrenches] Design Software?

[Andrew Truitt]

Hi Kelly!  I'm a fan of Helioscope, particularly for commercial
applications.  For projects with multiple roof pitches and/or partial
shading, Aurora works pretty well.


Regards,

Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

<https://www.linkedin.com/in/andrewtruitt/>

[image: Logo]

The content of this email is confidential and intended for the recipient
specified in this message only. It is strictly forbidden to share any part
of this message with any third party, without written consent of the
sender. If you received this message by mistake, please reply to this
message and follow with its deletion, so that we can ensure such a mistake
does not occur in the future.



On Mon, Oct 19, 2020 at 10:33 AM Kelly Larson  wrote:

> Hi y'all,
>
> Since I haven't been doing layout/design recently, I wonder what software
> I can recommend to a client.  He is a newbie doing mostly commercial
> systems - some roof and some ground mount.  The software needs to layout
> strings for string inverters, calc voltage drop, conductor sizes, etc, and
> show distances.
>
> Suggestions?
>
> Thank you in advance,
> Kelly
>
> ~~~
> Kelly Larson
> 707-223-3209
> Box 18094
> Reno, NV 89511
> Electrical Engineer
> NABCEP Certified PV Installation Professional™
> NABCEP Certified PV Installer Specialist™
> NABCEP Certified PV Commissioning & Maintenance Specialist™
> IREC Certified Master Trainer™/ PV
> CA Electrical Contractor# 868189
> Solar Energy International Instructor
> SolarKelly.com
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> There are two list archives for searching. When one doesn't work, try the
> other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

There are two list archives for searching. When one doesn't work, try the other:
https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
http://www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
http://www.members.re-wrenches.org

Re: [RE-wrenches] Floatovoltaics

[Andrew Truitt]

We've spoken with Isofloating <https://www.isifloating.com/en/> a few times
and have been pleased with their service and technical understanding of
real-world challenges.  Their US experience is not extensive, but the
product seems solid and pricing is competitive.  C seems to be a good
option as well.



Regards,

Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

<https://www.linkedin.com/in/andrewtruitt/>

[image: Logo]

The content of this email is confidential and intended for the recipient
specified in this message only. It is strictly forbidden to share any part
of this message with any third party, without written consent of the
sender. If you received this message by mistake, please reply to this
message and follow with its deletion, so that we can ensure such a mistake
does not occur in the future.


On Mon, Jun 15, 2020 at 8:31 PM Jim Duncan  wrote:

> At Ciel & Terre, we have been proudly *developing large-scale floating PV
> plants* for commercial, government and non-profit institutions worldwide 
> *since
> 2011*.
> https://www.ciel-et-terre.net/
> 
>
>
> On 6/15/2020 3:04 PM, Dave Angelini Offgrid Solar wrote:
>
> Hi Corey,
>
> Yep I have seen them up in Napa on a small lake. It seems very risky in
> the Caribbean. The only thing I want on a roof is gutters for rainwater.
> You can tell I am biased.  Maybe someone else has better info.
>
>
>
> *Dave Angelini Offgrid Solar
> "we go where powerlines don't"
> http://members.sti.net/offgridsolar/ <http://members.sti.net/offgridsolar/>
> e-mail  offgridso...@sti.net 
> text 209 813 0060*
>
> On Mon, 15 Jun 2020 13:15:42 -0500, Corey Shalanski 
>  wrote:
>
> Hi Dave,
>
> I was actually referring to a growing trend in the PV industry
> (particularly in Asia) to attach PV arrays - and also inverters in some
> cases - to floating pontoons and then install them on bodies of water. The
> systems are often referred to as floating PV (FPV) or "floatovoltaics".
> Here's an NREL link which provides further information about the concept:
> https://www.nrel.gov/news/press/2018/nrel-details-great-potential-for-floating-pv-systems.html
>
> --
> Corey Shalanski
> Jah Light Solar
> Portland, Jamaica
>
>
> On  Sun, 14 Jun 2020 07:30:14 -0700, Dave Angelini wrote:
>
>>
>> I know both Schneider mppt's can be negative, positive, or ungrounded.
>> Others must do this also. Is that what you are asking?
>>
>> They work as
>> expected as far as I have seen.
>
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & 
> settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive: 
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:www.members.re-wrenches.org
>
>
> --
> Jim Duncan
> Solar Acres Farm
> 817.917.0527solarguy2...@gmail.com
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] 250KW-500KW Off-grid Inverters?

[Andrew Truitt]

Jeff,

This has a little info on many of the global players
<https://germanyenglishnews.com/german-news/2020/04/08/energy-storage-battery-inverter-market-size-share-trends-sales-forecast-demands-volume/>,
including some that have products in the capacity range you refer to.  I'm
not sure how much the full report costs.

Sunpower also has a product.
<https://us.sunpower.com/commercial-solar/products/solar-battery-storage>

For commercial-scale LFP battery systems you might want to look at Powin
Energy <http://www.powinenergy.com/> out of Portland, OR.  They're
expanding from utility-only into the commercial realm and offer competitive
pricing, and have experience with various mid-size hybrid inverters.

<https://us.sunpower.com/commercial-solar/products/solar-battery-storage>

<https://us.sunpower.com/commercial-solar/products/solar-battery-storage>
Regards,

Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

<https://www.linkedin.com/in/andrewtruitt/>

[image: Logo]

The content of this email is confidential and intended for the recipient
specified in this message only. It is strictly forbidden to share any part
of this message with any third party, without written consent of the
sender. If you received this message by mistake, please reply to this
message and follow with its deletion, so that we can ensure such a mistake
does not occur in the future.


On Mon, Apr 13, 2020 at 5:04 PM David Katz  wrote:

> If you are working in Africa, Asia, or Europe the AC output  is 380-400
> 3-phase or 230 1-phase without the 120V center tap.
> If you are working on a country that used to be a puppet government of the
> USA it will be 120, 240 480 etc.
> David Katz
>
> On Mon, Apr 13, 2020 at 1:37 PM Kirk Herander  wrote:
>
>> Delta inverters with Blue ion and/or  Dellta's own battery pack.
>>
>> On 4/13/2020 4:18:15 PM, Jeff Clearwater 
>> wrote:
>> Hey There Esteemed Wrenches,
>>
>> Okay so hospitals all over the world are clambering for battery-inverter
>> systems and now with potential international funding not available before.
>> Goal is to replace diesel and higher reliability - we'll add solar later as
>> we go.
>>
>> But most medical clinics and small hospitals in the developing world are
>> needing 100KW-500 KW systems.
>>
>> I'm aware of the Dynapower Inverters out of S. Burlington Vermont- they
>> offer a 500KW, a 250 KW and a 125 KW at 800-1500 VDC and 480 and 600 VAC 3
>> ph.
>>
>> Anyone have direct experience with them?
>>
>> What other alternatives should we consider?
>>
>> Thanks!
>>
>> Jeff
>>
>> --
>> ~~~
>> Jeff Clearwater
>> Village Power Design
>> linkedin <https://www.linkedin.com/in/jeff-clearwater-0622a312/>
>> www.villagepowerdesign.com
>> cell - 413-559-9763
>> ~~~
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Solectria TL woes

[Andrew Truitt]

I'm with you guys and we actually had a bad transformer bushing at this
site initially which was causing exactly that issue.  The site still runs
high (498-508Vac nominal) but is well below the 528V default upper limit of
the TLs, and the shut-offs are not correlated with higher AC voltages.
Also the 50TLs, which have the same voltage input window and are connected
at the same panel, never have an issue.  The fact that Solectria is willing
to RMA the units without much more information than what I've given here
tells me that it may be a systemic issue with this run of inverters, right?

Jerry, the inverters are loaded at a 1.18 ratio so minor clipping happens
somewhat regularly.  DC voltage never exceeds the 850V upper MPPT limit.


Regards,

Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

<https://www.linkedin.com/in/andrewtruitt/>

[image: Logo]

The content of this email is confidential and intended for the recipient
specified in this message only. It is strictly forbidden to share any part
of this message with any third party, without written consent of the
sender. If you received this message by mistake, please reply to this
message and follow with its deletion, so that we can ensure such a mistake
does not occur in the future.


On Tue, Feb 25, 2020 at 2:02 PM Jason Szumlanski <
ja...@floridasolardesigngroup.com> wrote:

> It sure looks like it could be an AC voltage issue. Around here the
> utility voltage is often high in the morning and then gets dragged down
> when loads in the neighborhood spike from air conditioning (yes, even in
> winter here in Florida). We see drop-outs (with other brand inverters) in
> the mid-morning as a result. Usually the utilities here will resolve it if
> you demonstrate the voltage is high, even if it's not out of their
> acceptable range.
>
> Jason Szumlanski
>
>
>
> On Tue, Feb 25, 2020 at 3:16 PM Jerry Shafer 
> wrote:
>
>> Andrew
>> What is the AC Voltage when this occurs, to much VAC will shut down the
>> inverter. It also looks like you are clipping all the inverters during the
>> mid day, is due to low temps or does this always happen. What is the DC
>> MPPT voltage, is it at the upper limit.
>> Jerry
>> NABCEP PV inspector
>>
>> On Tue, Feb 25, 2020, 12:02 PM Andrew Truitt  wrote:
>>
>>>
>>> Wrenches,
>>>
>>> I have a couple of Solectria 36TLs at a small community solar site in CO
>>> that shut themselves down occasionally for what appears to be no reason.
>>>
>>> [image: image.png]
>>>
>>> Voltages and frequency are normal, firmware is updated, IR scan shows
>>> nothing irregular, and the other 2 inverters at the site (50TLs) are fine.
>>> It can happen under sunny or cloudy conditions.  Solectria will RMA the
>>> inverters but before I go out and replace I'm curious if anyone has seen
>>> this behavior?
>>>
>>>
>>> Regards,
>>>
>>> Andrew Truitt
>>>
>>> www.dr.ventures
>>> d: 202.486.7507
>>>
>>> NABCEP Certified PV Installation Professional ID: 032407-66
>>> Colorado Journeyman Electrician License No.: 600132
>>>
>>>
>>> <https://mailtrack.io/trace/link/fa22d5123ede6619559172cc0b417b15f93fbb6b?url=https%3A%2F%2Fwww.linkedin.com%2Fin%2Fandrewtruitt%2F=1613865=0e80aee3c0f6304e>
>>>
>>> [image: Logo]
>>>
>>> The content of this email is confidential and intended for the recipient
>>> specified in this message only. It is strictly forbidden to share any part
>>> of this message with any third party, without written consent of the
>>> sender. If you received this message by mistake, please reply to this
>>> message and follow with its deletion, so that we can ensure such a mistake
>>> does not occur in the future.
>>> ___
>>> List sponsored by Redwood Alliance
>>>
>>> List Address: RE-wrenches@lists.re-wrenches.org
>>>
>>> Change listserver email address & settings:
>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>> <https://mailtrack.io/trace/link/fc0d195abf7ef34b4caa0b5d7630f69a09d07827?url=http%3A%2F%2Flists.re-wrenches.org%2Foptions.cgi%2Fre-wrenches-re-wrenches.org=1613865=009f6d52da4a96c5>
>>>
>>> List-Archive:
>>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>> <https://mailtrack.io/trace/link/023a5edc45fcb68e1b958fa9895c682bef33f581?ur

[RE-wrenches] Solectria TL woes

[Andrew Truitt]

Wrenches,

I have a couple of Solectria 36TLs at a small community solar site in CO
that shut themselves down occasionally for what appears to be no reason.

[image: image.png]

Voltages and frequency are normal, firmware is updated, IR scan shows
nothing irregular, and the other 2 inverters at the site (50TLs) are fine.
It can happen under sunny or cloudy conditions.  Solectria will RMA the
inverters but before I go out and replace I'm curious if anyone has seen
this behavior?


Regards,

Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

<https://www.linkedin.com/in/andrewtruitt/>

[image: Logo]

The content of this email is confidential and intended for the recipient
specified in this message only. It is strictly forbidden to share any part
of this message with any third party, without written consent of the
sender. If you received this message by mistake, please reply to this
message and follow with its deletion, so that we can ensure such a mistake
does not occur in the future.
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Aftermarket monitoring

[Andrew Truitt]

Peter - Here's a comparison chart I put together as we explore our 3rd
party monitoring options in the wake of the Locus acquisition by Also
Energy, with the caveat that the info is collected from various sources
over time and may not be 100% accurate:


*GPM*
*Nor-Cal / Power Factors*
*QOS*
*Locus / Also *
*Can we use inverter-native meters*
Sometimes
Sometimes (direct to PF)
Yes
No
*If yes, can firmware upgrades / power cycling be pushed from the platform*
Sometimes
Sometimes

Sometimes
n/a
*Can we build our own meters*
Yes
Yes
Yes
Yes
*Vendor offers a pre-configured meter*
Yes
Yes
Yes
Yes
*SCADA capability*
Yes
Yes
Minimal
Yes
*Mobile app *
Yes

?
Yes 2: CMMS (available off-line), Monitoring
No locus / yes Also
*Predictive analytics that account for weather*
Yes
Yes

Yes
Yes
*PV O services*
No
Partnerships
No
No
*Weather station options*
Multiple
Lufft, Huxaflux (pyranometer), IMT (temp)
Obvious, others
RT1 / INT reference cell with temp
*Storage capabilities*
Yes
In development
Yes
Some
*Pricing structure*
Pay for hardware, software, and data, all w/ a significant margin built in
$10-15k minimum: RG meter (accuenergy), datalogger (Obvious Aquasuite,
Windows (Power Factors), cell modem (Sierra Wireless), owner buys wireless
plan
$/MW/year Pay for hardware, software, and data, all w/ a significant margin
built in

*Notes*
Optimized for utility and large-commercial
Open source
Swinerton partner
Partnering with eGuage for a lower-cost (potentially) meter option
https://store.egauge.net/ - Cost $250/meter to set up / $100/year for
platform


Optimized for utility and large-commercial
Obvious relationship
eGaurd - amalgamate data



Good ticketing / calendaring

All eGuage meters are RG, but only some CTs; Cellular is AT or T-mobile;



Pricing structure should work for small commercial
$400/site to set up all the alarms / models in PowerTrack


I'm curious what others are doing these days as Also continues to
consolidate monitoring platforms.

It sounds like an interesting project Peter, feel free to give me a call if
the customer might be interested in financing or 3rd party ownership for
the new ESS.


Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.


On Mon, Dec 9, 2019 at 8:28 AM  wrote:

> Good morning fellow wrenchers. Looking for recommendations on an
> aftermarket monitoring system. Commercial site, 208 and customer is putting
> back 3 times as much as they are using. They want to know when they are
> putting back, when they are buying and how much so we can design the right
> battery system to power shave those times. Thanks in advance.
>
>
>
> Peter Giroux
>
> American Solar & Alternative Energy Solutions
>
> Roswell Ga
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

[RE-wrenches] Tripping breaker

[Andrew Truitt]

Wrenches - I've got an Eaton HFD3090 90A breaker protecting a Solectria
50TL that's tripped twice in the past 5 days, after having no issues during
the first 8 months of system production (including throughout the summer).
Monitoring (inverter-direct and RG CTs) shows nothing unusual (all 3 phases
<57A) and nothing to indicate a brief edge-of-cloud effect.  I'm heading
out today to IR the AC connections and expect to see a some color, but
being as the site is somewhat remote wanted to check with the group on any
other recommendations before leaving.  I don't have a logging current meter
but might pick up a spare breaker to swap in if all connections check out.
Any other suggestions?  Anyone ever had nuisance tripping issues with Eaton
Series C breakers?


Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

[RE-wrenches] ISO low efficiency modules

[Andrew Truitt]

Wrenches - We're looking for 100-300 kW of low efficiency, low cost
modules.  Got a few hundred old 250s taking up space in your warehouse?
I'm your guy!  So long at the warranty is intact and they are ITC
eligible, we are interested.  Please contact me off-list.


Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

[RE-wrenches] 30-50kW 120/208V solar+storage recommendations?

[Andrew Truitt]

Anyone have any recommendations for Rule 21 compliant 30-50kW 120/208V
solar+storage options, preferably with backup capability (i.e. not
Storedge).  Seems like many of the traditional residential players have
options these days, but curious how they perform in the real world.


Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Residential tracker that has horizontal axis in east-west orientation?

[Andrew Truitt]

Another potential option:

http://www.sulasindustries.com/


Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.



On Tue, Aug 27, 2019 at 9:04 AM James Jarvis  wrote:

> Try US Solar Mounts:
>
>
> https://www.ussolarmounts.us/products/adjustable-ground-mount/tracking-system/
>
> -James Jefferson Jarvis
> APRS World, LLC
>
> This message sent from my cell phone. My apologies for brevity and
> spelling errors.
>
> On Tue, Aug 27, 2019, 06:35 Christopher Warfel <
> cwar...@entech-engineering.com> wrote:
>
>> Hi Dave, I am looking for a tracker that the horizontal "tube" runs east
>> west, so that the modules, when placed in portrait mode, are facing
>> south and will adjust their tilt angle based upon mostly by the season.
>> They have it so the horizontal tube runs north south and the module
>> rotate east west following the daily sun. The cannot be adjusted to
>> account for latitude . At noon, no matter what season they will be flat.
>> It's no good as you get further north.  Hope this makes more sense.  Chris
>>
>> On 8/26/2019 11:01 AM, Dave Angelini Offgrid Solar wrote:
>> > Chris,
>> >
>> > Can you restate this, I do not understand. I use alot of these and have
>> > quite a bit of experience with Wattsun, formerly Array tech, formerly
>> > Wattsun. I am also looking for a single axis that is on a 6 inch pole.
>> > Wattsun only makes the 8 inch that needs a back-hoe for lifting. Too
>> heavy
>> > for most offgrid.
>> >
>> > Dave Angelini Offgrid Solar
>> > "we go where powerlines don't"
>> > http://members.sti.net/offgridsolar/
>> > e-mail offgridso...@sti.net
>> > text 209 813 0060
>> >
>> > On Mon, 26 Aug 2019 09:33:01 -0400, Christopher Warfel
>> >  wrote:
>> >> Not too long ago there were postings about residential trackers. I put
>> >> in a plug for Array Tech, but we are having a very hard time with
>> >> getting information on the controller and how to get it to work for our
>> >> case. I have moved the sensor every which way but pointing down...
>> >> Their controller comes from the commercial/utility side of the company
>> >> and is designed to place as many modules on a foot print and eliminate
>> >> shading which isn't an issue if you are putting in one single tracker.
>> >> The horizontal axis is north south, and the modules move east west. The
>> >> array is a  zero tilt which is non optimal for most of the year.  Does
>> >> anyone know of a single axis tracker that is designed for east west
>> >> horizontal axis so the modules can adjust throughout the day and
>> seasons
>> >> with the modules facing south?  Thank you, Chris Warfel
>> >>
>> >> ___
>> >> List sponsored by Redwood Alliance
>> >>
>> >> List Address: RE-wrenches@lists.re-wrenches.org
>> >>
>> >> Change listserver email address & settings:
>> >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>> >>
>> >> List-Archive:
>> >>
>> >
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>> >> List rules & etiquette:
>> >> www.re-wrenches.org/etiquette.htm
>> >>
>> >> Check out or update participant bios:
>> >> www.members.re-wrenches.org
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>> 

Re: [RE-wrenches] Bi-facial modules

[Andrew Truitt]

Chris - A few resources:

Jorge Blanquet at Silfab: j.blanq...@silfabsolar.com.  We used their SLA-X
295 modules for a carport project and Jorge was helpful in helping source
from 2 different distributors (CED and Krannich).  The mods are well built
but we're not seeing much backside production.  Word on the street is they
flash test their bifacials against a white background.

Tyler Stewart at Prism: t.stew...@prismsolar.com.  I'm not sure if Prism is
selling into the resi market right now but Tyler is a good guy and will
help you if he can.

Chris Deline at NREL: chris.del...@nrel.gov.  Chris is working on
simulating bifacial production in various applications, following on from
his earlier work <https://www.nrel.gov/docs/fy16osti/66496.pdf>.  If this
customer has a dark roof backside production will be minimal, but if they
have a lighter colored roofing material it could boost production, and
Chris might be able to point you towards some resources to help estimate
that.


Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.


On Tue, Aug 13, 2019 at 12:30 PM Chad Waits 
wrote:

> LG makes bifacials. BayWa will have a stock of them.
>
> good luck.
>
> Chad Waits
> President
> 520-270-4873
>
>
>
> On Tue, Aug 13, 2019 at 10:31 AM Ryan Harkins <
> ryan.hark...@energycraft.com> wrote:
>
>> Hey Chris,
>>
>> Speed Solar, Inc. in Deerfield, WI stocks bifacial modules from
>> Adani/Mundra Solar.
>>
>> (608) 764-4900
>> a...@speedsolar.net
>>
>> Ask for Al or Cal.
>>
>> Now mounting is the trick!
>>
>> Best,
>> Ryan
>>
>>
>>
>> On Aug 13, 2019, at 9:08 AM, > ch...@oasismontana.com> wrote:
>>
>> Hello people:
>>
>>
>>
>> We have a customer with their heart set on bi-facial modules for their
>> residential project.  Despite the lack of import tariffs, they are not
>> easily found.  Does anyone know of a company offering these?  Thanks!
>>
>>
>>
>>
>>
>> Chris Daum
>>
>> Oasis Montana Inc.
>>
>> 406-777-4309
>>
>> 406-777-4309 fax
>>
>> *www.oasismontana.com <http://www.oasismontana.com>*
>>
>>
>>
>>
>>
>>
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

[RE-wrenches] IEC 62446-2018

[Andrew Truitt]

Wrenches - Does anyone know of a way one might get their hands on a copy of
the latest IEC 62446 standard without dropping $300+?


Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Consolidating meters

[Andrew Truitt]

Thanks all!  To clarify, we're only looking at consolidating meters for the
common area loads, not the individual residences.  The dwellings all have
their own PSE accounts and will stay on their residential rate.  The
common area meter tariffs already have demand changes, in some case up to
$30/kW in the summer, which is a major driver for consolidation as the
aggregated demand can be addressed with storage more cost-effectively.
We've engaged a local EE that has consolidated meters in PSG territory
and is sending over a feasibility study proposal today.


Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.



On Mon, Jul 8, 2019 at 7:14 AM Dave Tedeyan  wrote:

> Andrew,
> We did this in upstate NY for a housing coop with 12 meters, on two
> separate transformers. Our utility put them on a demand meter immediately
> even though the demand was never that high. Seems like others have already
> warned you to look into that. Another snag was that in NY it required a
> petition to the Public Service Commission to allow master metering. There
> were certain contracts that needed to be in place for the protection of the
> end customer. (i.e., what if the coop fails to pay some bills, but the end
> customers are paying the coop. Then it is the end customer that gets
> screwed over when the power gets cut off.) They also had a set list of
> approved meters that can be used for submetering. We were planning on using
> eGauges, but ended up needing to put in an approved glass meter as well.
>
> Cheers,
> Dave
>
> *Dave Tedeyan, PE*
> Senior Engineer | Taitem Engineering, PC
>
> 110 South Albany Street | Ithaca, NY 14850
> o. *607.277.1118 x121*  f. 607.277.2119
> www.taitem.com
>
> Solar • Sustainability • Energy • Design
> B-Corporation Best for the World 2018 Honoree
>
>
> On Sat, Jul 6, 2019 at 4:03 PM Christopher Warfel <
> cwar...@entech-engineering.com> wrote:
>
>> Good point Jeff, HOA could all of a sudden be a commercial demand
>> account.  I think you have to wait for PSEG to tell you what they allow.
>> Every situation seems unique, so it is difficult to say what is typical.
>> They may be served by multiple service points.  PSEG has that information.
>> I think it will save you a lot of running around if you get into a
>> discussion with the Customer Service of Distribution Engineering sides of
>> the company.  If it is served by one xfmr than the meter solution would be
>> to meter onthe secondary side.  But again, Jeff brings up a good point.
>> PSEG should be able to combine all 200 accounts into a single account for
>> analysis.   They can tell you if demand charges would apply to the master
>> account, and if by increased kWh billed in the aggregate, if that would
>> push you into a lower kWh tariff rate.  Chris
>> On 7/5/2019 1:52 PM, Andrew Truitt wrote:
>>
>>
>> Thanks fellas.  Todd, these meters are already on a single account but
>> NJ's remote net metering law only covers public entities .
>>
>> Chris, all meters are owned by the same entity (the HOA).  We have a call
>> into the utility (PSE).  We do not have experience in this area so any
>> advice you may have on how to be successful in this endeavour based on your
>> time on the other side of the curtain would be appreciated.  Would an
>> entity like this (a community with ~200 homes) typically be served by a
>> single transformer or multiple?  If a single then the simplest / most
>> attainable solution would be to re-route the 15 meter circuits to a
>> pad-mounted panelboard / main meter on the secondary side of the
>> transformer, right?
>>
>>
>> Regards,
>>
>>
>> Andrew Truitt
>>
>> www.dr.ventures
>> d: 202.486.7507
>>
>> NABCEP Certified PV Installation Professional ID: 032407-66
>> Colorado Journeyman Electrician License No.: 600132
>>
>> [image: Logo]
>>
>>
>>
>> The content of this email is confidential and intended for the recipient
>> specified in message only. It is strictly forbidden to share any part of
>> this message with any third party, without a written consent of the sender.
>> If you received this message by mistake

Re: [RE-wrenches] Consolidating meters

[Andrew Truitt]

Thanks fellas.  Todd, these meters are already on a single account but NJ's
remote net metering law only covers public entities .

Chris, all meters are owned by the same entity (the HOA).  We have a call
into the utility (PSE).  We do not have experience in this area so any
advice you may have on how to be successful in this endeavour based on your
time on the other side of the curtain would be appreciated.  Would an
entity like this (a community with ~200 homes) typically be served by a
single transformer or multiple?  If a single then the simplest / most
attainable solution would be to re-route the 15 meter circuits to a
pad-mounted panelboard / main meter on the secondary side of the
transformer, right?


Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.



On Fri, Jul 5, 2019 at 5:57 AM Christopher Warfel <
cwar...@entech-engineering.com> wrote:

> I used to work for a utility and it is utility dependent. The key I think
> is whether all the submetering customers are actually owned by the same
> entity.  For example, a commercial complex may have several building on
> site, each submetered.  The whole complex could be master metered at the
> service delivery point.  If so, master metering will save in several ways,
> most notably the monthly charge, but demand charges and possibly a
> reduction in the energy charge depending upon the tariff can also occur.
> The utility should be able to run the analysis for you. I would request
> from the utility the details on master metering at the location.  This will
> quickly get you into their domain/processes.  Unless you have experience in
> this area, it can be difficult to calculate the cost/benefit.  Chris
>
>
> On 7/4/2019 2:09 PM, Andrew Truitt wrote:
>
>
> Happy 4th Wrenches!  Has anyone ever been through the process of
> consolidating utility electric meters for a client?  We're talking to an
> HOA that has 15 meters throughout the community for common area loads
> (clubhouse, pool pump, lighting, fountain...) so they're paying a fixed
> monthly charge on each in addition to energy and demand charges.
> Consolidating to a single master meter (possibly with sub-metering) would
> likely lower their costs on its own, and (more importantly?) would improve
> the value proposition for a PV+ESS installation.  We're not sure if the
> community is served by a single or multiple transformers yet, but if it is
> just one then the process should be straightforward from a technical
> standpoint.  The interwebs tell me that some providers (seems like mostly
> co-ops) are open to this, but I can't find anything for this particular
> utility.
>
>
> Regards,
>
>
> Andrew Truitt
>
> www.dr.ventures
> d: 202.486.7507
>
> NABCEP Certified PV Installation Professional ID: 032407-66
> Colorado Journeyman Electrician License No.: 600132
>
> [image: Logo]
>
>
>
> The content of this email is confidential and intended for the recipient
> specified in message only. It is strictly forbidden to share any part of
> this message with any third party, without a written consent of the sender.
> If you received this message by mistake, please reply to this message and
> follow with its deletion, so that we can ensure such a mistake does not
> occur in the future.
>
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & 
> settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive: 
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:www.members.re-wrenches.org
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participan

[RE-wrenches] Consolidating meters

[Andrew Truitt]

Happy 4th Wrenches!  Has anyone ever been through the process of
consolidating utility electric meters for a client?  We're talking to an
HOA that has 15 meters throughout the community for common area loads
(clubhouse, pool pump, lighting, fountain...) so they're paying a fixed
monthly charge on each in addition to energy and demand charges.
Consolidating to a single master meter (possibly with sub-metering) would
likely lower their costs on its own, and (more importantly?) would improve
the value proposition for a PV+ESS installation.  We're not sure if the
community is served by a single or multiple transformers yet, but if it is
just one then the process should be straightforward from a technical
standpoint.  The interwebs tell me that some providers (seems like mostly
co-ops) are open to this, but I can't find anything for this particular
utility.


Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

[RE-wrenches] Small canopy options

[Andrew Truitt]

Does anyone have experience with / recommendations for small (~25-35kW)
solar canopy structures?  Its a bit of a "tweener" size...


Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Residential tracker options

[Andrew Truitt]

Sulas  is pretty new, but I've heard good
things.  The concept is similar to Zomeworks, but they use paraffin wax
instead of whatever fluid Zomeworks uses (freon?) with the intention of
avoiding reliability issues while maintaining the simplicity and positive
economics of passive actuation.


- Andrew



"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough


On Thu, Jun 13, 2019 at 3:13 PM Dave Angelini Offgrid Solar <
offgridso...@sti.net> wrote:

> Have you looked at the Wattsun HZLA? No ladders and with the right module
> about 5KW tracked. Perfect for long hours of cooling or pumping.
> http://www.wattsun.com/products/accutrak-hzla-tracker
>
> *Dave Angelini Offgrid Solar
> "we go where powerlines don't"
> http://members.sti.net/offgridsolar/ 
> e-mail  offgridso...@sti.net 
> text 209 813 0060*
>
> On Thu, 13 Jun 2019 12:46:58 -0400, Dave Tedeyan 
> wrote:
>
> Chris,
> We have used AER for trackers. We've had good success with them.
> https://www.allearthrenewables.com/product/allearth-solar-trackers
>
> Cheers,
> Dave
>
> *Dave Tedeyan, PE*
> Senior Engineer | Taitem Engineering, PC
>
> 110 South Albany Street | Ithaca, NY 14850
> o. 607.277.1118 x121  f. 607.277.2119
> www.taitem.com
>
> Solar • Sustainability • Energy • Design
> B-Corporation Best for the World 2018 Honoree
>
> On Thu, Jun 13, 2019 at 12:40 PM  wrote:
>
>> Dear people:
>>
>> Now that Zomeworks is more-or-less down the tubes, what resources do you
>> have for a residential tracking system?  Wattsun's 'one size fits all'
>> really doesn't (and I don't need a need a lecture of ROI for buying more
>> modules versus a tracker).  I'm just wondering if there are more options
>> besides the utility grade models.  We have a great pole mount supplier –
>> but some folks want a tracker.  I'm looking forward to your responses.
>>
>> Best,
>>
>> Chris Daum
>>
>>
>> Oasis Montana Inc.
>>
>>
>>   406-777-4309
>>
>>
>>
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
> --
>
>
>
>
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Retrofit BMS

[Andrew Truitt]

Thanks fellas, great feedback.  Nuvation looks pretty solid David.  I've
heard of issues arising when integrating Li+ BMS system with hybrid solar
inverters even when they represent that they are Li+ compatible, such as
tripping overcurrent protection in the BMS with milisecond-level surges at
inverter start-up.  Sounds like that has not been an issue for you with
this system?


Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.


On Sat, May 4, 2019 at 1:10 PM David Katz  wrote:

> I have used Nuvation BMS with Nissan Leaf batteries in a off grid hone.
> They have been running for 2 years and the cells are staying within 0.02
> volts.
> There are a lot of parameters to set but their tech help is great. They
> can drive 4 relays based on almost anything you can think of and they also
> have modbus output.
> David Katz
>
> On Fri, May 3, 2019 at 2:47 PM Andrew Truitt  wrote:
>
>>
>> Wrenches - I have an opportunity to take possession of some lightly used
>> 2 kWh Lishen LFP battery packs for next to nothing.  What's the catch?  No
>> BMS.  Anyone have any experience retrofitting a BMS on Li+ batteries?  This
>> looks interesting <http://electrodacus.com/>, and this EV BMS
>> <https://www.orionbms.com/>is theoretically compatible with PV, but I'd
>> love to compare with something a little more proven.
>>
>>
>>
>> *Regards, *
>>
>>
>> *Andrew Truitt*
>>
>> www.dr.ventures
>> d: 202.486.7507
>>
>> NABCEP Certified PV Installation Professional ID: 032407-66
>> Colorado Journeyman Electrician License No.: 600132
>>
>> [image: Logo]
>>
>>
>>
>> The content of this email is confidential and intended for the recipient
>> specified in message only. It is strictly forbidden to share any part of
>> this message with any third party, without a written consent of the sender.
>> If you received this message by mistake, please reply to this message and
>> follow with its deletion, so that we can ensure such a mistake does not
>> occur in the future.
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>> --
> David Katz Sent from Gmail Mobile
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

[RE-wrenches] Retrofit BMS

[Andrew Truitt]

Wrenches - I have an opportunity to take possession of some lightly used 2
kWh Lishen LFP battery packs for next to nothing.  What's the catch?  No
BMS.  Anyone have any experience retrofitting a BMS on Li+ batteries?  This
looks interesting <http://electrodacus.com/>, and this EV BMS
<https://www.orionbms.com/>is theoretically compatible with PV, but I'd
love to compare with something a little more proven.



*Regards, *


*Andrew Truitt*

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] SMA Kiosk

[Andrew Truitt]

Locus (now part of Also) has a pretty nice kiosk view
<http://kiosk.datareadings.com/P63FsYjN/project-info/1/photos/1?slideshow=true>,
though you'd need to install a Locus meter.



Regards,


Andrew Truitt

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.




On Wed, Feb 13, 2019 at 3:40 PM Sam Haraldson 
wrote:

> We have a couple Sunny Portal kiosks out in the world.  It's quite easy to
> set up, but the downside to it is how lackluster the information displayed
> looks on a screen.  Especially considering how nice these kiosks look when
> using a Solaredge or Fronius inverter.  Here are examples of what each
> manufacturer's "kiosk" display looks like:
>
> SMA:
>
> https://www.sunnyportal.com/Templates/PublicPage.aspx?page=0d53e0d8-e5ff-4ad8-8267-a3363b9485e9
>
> Fronius:
>
> https://www.solarweb.com/PvSystems/PvSystem?pvSystemId=fc073f0c-ce57-4cbf-9678-a576013cd6a8
>
> Solaredge:
>
> https://monitoringpublic.solaredge.com/solaredge-web/p/kiosk?guid=0cd30edc-039b-48aa-9a3f-e3a295ce9d47
>
> I have reached out to SMA inquiring whether they had any suggestions or
> whether that was something they were working on improving but I didn't
> really get anywhere in that discussion.
>
> - Sam
>
> --
> OnSite Energy
> Bozeman, MT
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Lithium battery cost

[Andrew Truitt]

Good point Dave.  LFP has a much higher ignition point than NMC and that
added safety is often deemed worth the added weight for stationary
applications.

Not sure about resi-scale costs but Adara has a nice C product priced in
the range you mentioned Jay, but including design, installation,
commissioning and 10 years of O  Powin Energy has VERY competitive
pricing starting in the 500kWh range, and will have smaller packs coming
out next year.



*Regards, *


*Andrew Truitt*

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.


On Fri, Dec 21, 2018 at 8:38 AM Dave Angelini Offgrid Solar <
offgridso...@sti.net> wrote:

> The Chevy, Tesla, Nissan are all NMC lithium. Residential is mostly all
> LFP except LG.
>  NMC is about 1/2 the weight as LFP also. Different design goals is my
> take.
>
> Dave Angelini Offgrid Solar
> "we go where powerlines don't"
> http://members.sti.net/offgridsolar/
> e-mail offgridso...@sti.net
> text 209 813 0060
>
> On Thu, 20 Dec 2018 17:05:47 -0800, Jay  wrote:
> > Hi all,
> >
> > I was doing some research on the Chevy bolt, and found that it’s battery
> > cost about $145 per kWh in 2015.
> >
> > All the batteries I can find for sale for offgrid small systems ( 10-100
> > kWh) are in the $700-1000 per kWh
> >
> > Does anyone have insight into this.
> > Or maybe better put, ways to buy at closer to the $145 kWh?
> >
> > Thanks
> >
> > Jay
> > Peltz power.
> >
> >
> >
> >
> >
> >
> > ___
> > List sponsored by Redwood Alliance
> >
> > List Address: RE-wrenches@lists.re-wrenches.org
> >
> > Change listserver email address & settings:
> > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
> >
> > List-Archive:
> >
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
> >
> > List rules & etiquette:
> > www.re-wrenches.org/etiquette.htm
> >
> > Check out or update participant bios:
> > www.members.re-wrenches.org
>
> --
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Portable Power Centers

[Andrew Truitt]

Peter - I would contact Faisal at GetChargedUp, they've been doing great
things with mobile power for PR
<https://getchargedup.net/empower-emergency/building-a-solar-trailer/>, and
their based in CA, and they know what they're doing.

Scott Sklar at The Stella Group <http://www.thestellagroupltd.com/> has
built some very robust mobile solutions for the US military.


A few other options:

http://www.mobilesolarpower.net/

https://www.amerescosolar.com/solar-power-mobile-solutions

https://www.bigdogsolar.com/custom-mobile-solar-trailers/




*Regards, *


*Andrew Truitt*

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.


On Sun, Dec 9, 2018 at 10:10 AM Dan Fink  wrote:

> Every one of these I've seen so fardating back over 10
> yearsdrastically undersizes the battery bank, I assume because that's
> the expensive part.
>
> Dan Fink
> Professor of Solar Energy Technology, Ecotech Institute
> IREC Certified Instructor™ for:
> ~ PV Installation Professional
> ~ Small Wind Installer
> Executive Director, Buckville Energy
> NABCEP Registered Continuing Education Providers™
> NABCEP PV Associate
>
> 970.672.4342
>
>
>
>
> On Sun, Dec 9, 2018 at 9:21 AM glenn.b...@glbcc.com 
> wrote:
>
>> I recently saw a YouTube video that compared 4 or 5 portable power units.
>> You might try a search there.
>>
>> Glenn
>>
>> Sent from my 'smart' phone so please excuse spelling and typos.
>>
>> -- Original message--
>> *From: *Peter Parrish
>> *Date: *Sun, Dec 9, 2018 1:17 AM
>> *To: *RE-wrenches;
>> *Cc: *
>> *Subject:*[RE-wrenches] Portable Power Centers
>>
>> We are working with Turning Point Foundation a 501(c)3 to provide
>> off-grid power for their River Haven project which is providing
>> transitional housing for homeless folks in the Ventura CA area.
>>
>>
>>
>> The site is truly off-grid and currently uses propane to power three
>> refrigerators and cook stoves. There is no space heating for the single
>> occupancy rooms as of yet. But that’s another problem.
>>
>>
>>
>> We are looking to specify DC refrigerators and PV-powered battery storage
>> for the River Haven project. We are looking at the Goal Zero Yeti-3000
>> system (3000 Whr, 500 full discharge cycles, to 80% residual capacity) at a
>> sale price of $2,400 but are finding the extra cost of their PV modules
>> quite steep. And looking at other 36-cell (12 volt) modules, I can’t find
>> anything for less than $1.10/W.
>>
>>
>>
>> Since Goal Zero is looking at the recreational market, I thought that
>> there might be o ther companies with comparable product offerings that are
>> focusing on other markets like developing countries.
>>
>>
>>
>> Any advice would be appreciated and you may contact us off-line.
>>
>>
>>
>> Peter T. Parrish
>> SolarGnosis
>> 1107 Fair Oaks Ave. Ste. 351
>> South Pasadena, CA 91030
>> (323) 839-6108
>> peter.parr...@solargnosis.com
>>
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

[RE-wrenches] SMA CORE1 62.5kW availability

[Andrew Truitt]

Does anyone know of an east coast distributor with the new CORE1 62-US
inverters in stock?  Our distributor is experiencing delays.



*Regards, *


*Andrew Truitt*

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Microfractures

[Andrew Truitt]

Jerry - Thanks for the input!  No snail trails or burn marks at his point
as the system has yet to be commissioned.  There will be an aerial IR
inspection once we're operating and if anything shows up it'll be addressed
for sure, but my understanding of microfractures is that the effects often
don't show up for years (save for what can be seen with EL testing).



*Regards, *


*Andrew Truitt*

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.



On Fri, Nov 16, 2018 at 5:27 PM Jerry Shafer 
wrote:

> Andrew, Wrenches
> While in Hawaii, l had modules that had fractures, some showed up in low
> performance, some did not and l don't recall there being a wobble on the
> high side. I would suggest inspecting what the modules look in question.
> Most of the time the cracks are visable and may look like worm tracks, they
> will be across the modules. Also look for what appears to be cigarette
> burns, this is trace arcing or at least overheating of the trace and they
> can appear at the interconnecting trace or main traces mostly at the change
> in direction of the trace. I have also had bad bypass diode connections
> have issues effecting performance curves.
> Jerry
> NABCEP Inspector
> NABCEP Installer
>
> On Fri, Nov 16, 2018, 12:03 PM Andrew Truitt 
>>
>>
>> Wrenches - Does anyone have experience getting electroluminescence (EL)
>> test results from module manufacturers?  I just shot some module IV curves
>> as part of an acceptance test and they all show some irregularities on the
>> vertical slope that Solmetric says are indicative of microfractures:
>>
>> [image: image.png]
>>
>>
>> It seems the optimal course of action here is to perform EL testing on a
>> random sample of mods in the field and compare with images from the factory
>> to hone in on the root cause.  However field EL testing is not cheap and
>> even if we do determine that the damage occured after modules left the
>> factory, how could it be proven if its the shipper or the EPC at fault?  I
>> foresee everyone pushing back and invoking the performance warranty as the
>> backstop if issues pop up in the future (assuming nothing shows up during
>> performance testing next month), but the last thing we want deal with is a
>> massive (or worse, piecemeal) warranty claim in 5 years.  Or the array may
>> mildly underperform year over year, not enough to trigger warranties but
>> still costing thousands in lost revenue.  The system is a 200kW ground
>> mount in CO using tier 1 (top 5) Chinese modules.  Anyone dealt with this
>> type of situation before?
>>
>>
>>
>> *Regards, *
>>
>>
>> *Andrew Truitt*
>>
>> www.dr.ventures
>> d: 202.486.7507
>>
>> NABCEP Certified PV Installation Professional ID: 032407-66
>> Colorado Journeyman Electrician License No.: 600132
>>
>> [image: Logo]
>>
>>
>>
>> The content of this email is confidential and intended for the recipient
>> specified in message only. It is strictly forbidden to share any part of
>> this message with any third party, without a written consent of the sender.
>> If you received this message by mistake, please reply to this message and
>> follow with its deletion, so that we can ensure such a mistake does not
>> occur in the future.
>>
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://

[RE-wrenches] Microfractures

[Andrew Truitt]

Wrenches - Does anyone have experience getting electroluminescence (EL)
test results from module manufacturers?  I just shot some module IV curves
as part of an acceptance test and they all show some irregularities on the
vertical slope that Solmetric says are indicative of microfractures:

[image: image.png]


It seems the optimal course of action here is to perform EL testing on a
random sample of mods in the field and compare with images from the factory
to hone in on the root cause.  However field EL testing is not cheap and
even if we do determine that the damage occured after modules left the
factory, how could it be proven if its the shipper or the EPC at fault?  I
foresee everyone pushing back and invoking the performance warranty as the
backstop if issues pop up in the future (assuming nothing shows up during
performance testing next month), but the last thing we want deal with is a
massive (or worse, piecemeal) warranty claim in 5 years.  Or the array may
mildly underperform year over year, not enough to trigger warranties but
still costing thousands in lost revenue.  The system is a 200kW ground
mount in CO using tier 1 (top 5) Chinese modules.  Anyone dealt with this
type of situation before?



*Regards, *


*Andrew Truitt*

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]



The content of this email is confidential and intended for the recipient
specified in message only. It is strictly forbidden to share any part of
this message with any third party, without a written consent of the sender.
If you received this message by mistake, please reply to this message and
follow with its deletion, so that we can ensure such a mistake does not
occur in the future.
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Any thoughts on this approach to adding battery backup to an existing grid tie system will be appreciated.

[Andrew Truitt]

Anyone have any experience with the SMA Sunny Boy Storage for this
application?  Li+ compatible, HVDC bus, black-start capable... looks like
no generator input though.  I wonder how well it works when AC coupled with
with non-SMA inverters.



*Regards, *


*Andrew Truitt*

www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132

[image: Logo]




"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough


On Thu, Sep 13, 2018 at 6:21 AM Will White  wrote:

> I agree with everything Ray has said when you're using a system with
> lead-acid batteries, however this doesn't apply to lithium-ion. Li
> batteries don't need multistage charging like LA batteries do so they would
> be a perfect fit for a retro-fit battery backup system that can only bulk
> charge.
>
> I'd also suggest people check out the Enphase IQ8 system which allows the
> inverters to operate without the grid with no storage. They should also be
> able to black start an AC coupled system with no grid unlike other AC
> coupled designs. I haven't seen it in person but two of my co-workers
> toured their demo project and it seems to live up to everything Enphase is
> claiming.
>
> Thanks,
> Will
>
> On Wed, Sep 12, 2018 at 8:38 PM Ray  wrote:
>
>> I didn't watch the whole thing, but it looked like a standard AC couple
>> set up with an Outback Radian.  My understanding is that Outback no longer
>> supports AC Coupling, BTW.  I would never use that for an off grid system
>> or  for longer outages.  In a very brief explanation,  it essentially
>> bypasses any charge controlling to the batteries, and puts full Array power
>> into the batteries until a relay (or phase shifting) disconnects the
>> array.  No three stage charging, no taper charging, no float, no temp
>> compensation.  Its like trying to fill a 5 gal bucket with a fire house, or
>> drive a car with a throttle that's either off or at full throttle, no in
>> between.  The other issue is that if the batteries get low and the inverter
>> shuts off, the system will not recharge, and after a couple of weeks the
>> batteries will be sulfated beyond recovery.
>>
>> My guess is that manus that advocated this approach got into trouble from
>> end users that fried expensive battery banks during longer outages.  I
>> would consider it the equivalent of cheap backup generators: a great backup
>> system for folks that don't need it.   There are probably thousands of
>> those out there with happy customers and installers, because its never
>> actually been used for more than a few hours, and the batteries are
>> properly charged from the grid 99.8% of the time.
>>
>> Ray Walters
>> Remote Solar
>> 303 505-8760
>>
>> On 9/12/18 6:11 PM, Ken Schaal wrote:
>>
>> https://www.youtube.com/watch?v=eyhkIfS5Z-Q
>>
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & 
>> settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive: 
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:www.members.re-wrenches.org
>>
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>>
>
> --
> *Will White*
> Curriculum Developer
>
>
> e: w...@solarenergy.org
> w: www.solarenergy.org
> p: 802-272-3092
>
> PV Installation Professional
> # 093006-34
>
> *FACT:  If we covered 0.33% of the earth with solar panels, we could power
> the world with renewable energy.*
>
> Do you envision a world powered by renewable energy? Be the change
> <

Re: [RE-wrenches] Trackers

[Andrew Truitt]

These guys are new but I've heard good things:
http://www.sulasindustries.com/


*Regards, *

*Andrew Truitt | DRV <http://dr.ventures/>*
www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132



"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough


On Wed, Sep 5, 2018 at 9:38 PM Sindelar Solar 
wrote:

> Bill,
>
> No, I'm with you on this.Given the the greatest boost (~+/- 30%) of daily
> tracking is during the summer and most stand-alone applications are
> winter-peak (where tracking adds at best 10-15%), seasonal water pumping is
> about the only time when small-scale tracking is justified over simply
> adding array. Any pumping where the source is slow enough that the length
> of the day becomes an important factor, like drip irrigation or a very low
> yield well or spring, is worth looking into. But that's about it in my
> experience.
>
> Allan
>
> --
>
> *Allan Sindelar*
> al...@sindelarsolar.com
> NABCEP Certified PV Installation Professional
> New Mexico EE98J Journeyman Electrician
> Founder (Retired), Positive Energy, Inc.
> *505 780-2738 cell*
> On 9/5/2018 5:53 PM, solar1onl...@charter.net wrote:
>
> Chris,
> I thought since solar PV prices have come down (understatement), is it not
> more cost effective to buy more modules than a tracker? Are there scenarios
> that the above would not ring true? (As I remember, off grid water pumping
> for livestock ponds may still be an exception as also, limited space.)
> Please advise.
> Thanks,
> Bill Loesch
> Solar 1 - Saint Louis Solar
> 314 631 1094
>
> 
> From: ch...@oasismontana.com
> Sent: Wednesday September 5 2018 3:45:25PM
>
> Dear people:
>
> What trackers are y’all using nowadays?  I have a customer (with a great
> site) who’s insisting on a pair.  We’ve sold Zomeworks and Array
> Technologies in the past, but I know there are more offerings now.
>
> Thanks for the input!
>
> Chris Daum
>
> Oasis Montana Inc.
>
> 406-777-4309 or 4321
>
> 406-777-4309 fax
>
> www.oasismontana.com
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & 
> settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive: 
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:www.members.re-wrenches.org
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Cell Cracks

[Andrew Truitt]

Spot-on Glenn.  Ray - check out this doc from REC
<http://aeesolar.com/wp-content/uploads/2017/01/2017DC-Microcracks-and-Solar-Modules.pdf>.
Its not uncommon for there to be no measurable effect from a microcrack at
first, but efficiency and safety can be significantly impacted after years
of thermal cycling.  Apparently the best way to detect them in the field is
electroluminescence testing.  Not particularly cost effective for one-off
resi, but for larger systems it could make sense to test a sample.  These
guys <http://www.acuitypower.com/>provide in-field EL testing services and
are rock stars.


*Regards, *

*Andrew Truitt | DRV <http://dr.ventures/>*
www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132


On Tue, Aug 14, 2018 at 8:34 PM Ray  wrote:

> I haven't seen the actual modules, and I am not that familiar with
> microfractures or snail trails either.
>
> Ray Walters
> Remote Solar
> 303 505-8760
>
> On 8/14/18 7:42 PM, glenn.b...@glbcc.com wrote:
>
> Ray,
>
> Do you feel that these are different from the microfractures or snail
> trails that were  reported widely across the industry a couple of years ago?
>
> Glenn
>
> Sent from my 'smart' phone so please excuse spelling and typos.
>
> -- Original message--
> *From: *Ray
> *Date: *Tue, Aug 14, 2018 10:24 AM
> *To: *RE-wrenches;
> *Cc: *
> *Subject:*[RE-wrenches] Cell Cracks
>
> Hi All;
>
> I've had a colleague ask that I post a couple pictures of what appears
> to be cracks in cells under the glass.  The glass is not damaged.  These
> are Sun Edison modules, so apparently no warranty.  Has anyone seen
> this, and are these possibly dangerous (hot spots) or is this nothing to
> worry about?  An Infrared camera did not show any issues.
>
> As always your invaluable input is always appreciated.
>
> Thanks,
>
> --
> Ray Walters
> Remote Solar303 505-8760
>
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org 
> <%20re-wrenc...@lists.re-wrenches.org>
>
> Change listserver email address & 
> settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive: 
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:www.members.re-wrenches.org
>
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] 208V single-phase inverter options

[Andrew Truitt]

Thanks gentlemen.  I think that Primo is going to be the best option (thank
you August!).  The service is 120/208 wye so it looks like we'd connect 2
hot legs + neutral for each inverter.  Been a while since I've done one of
these (I think we ran into some older homes in the DC area with 208V
single-phase back in the day) but as I recall so long as you have the right
inverter everything else is the standard single-phase design and
installation process.


*Regards, *

*Andrew Truitt | DRV <http://dr.ventures/>*
www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132



"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough


On Mon, Jul 16, 2018 at 9:22 PM frenergy  wrote:

> I recently stacked 3, SMA SB-40 inverters and combined there outputs for
> 208 single phase.  Their 7.7KW puts out 6,660 watts at 208, 1Ph.
>
> Bill
>
> On 7/16/2018 6:29 PM, August Goers wrote:
>
> Hi Andrew,
>
> Fronius Primo inverters go up to 15 kW 208 v single phase, but are limited
> to 13750 VA output in 208 volt operation. I'm not aware of larger single
> phase 208 v inverters, although it is certainly possible that they are out
> there.
>
>
> http://www.fronius.com/en-us/usa/photovoltaics/products/all-products/inverters/fronius-primo/fronius-primo-15-0-1-208-240
>
> August
>
>
>
>
> On Mon, Jul 16, 2018 at 6:18 PM Andrew Truitt  wrote:
>
>>
>> I'm in the hunt for a 208V single-phase inverter in the 15-30kW range for
>> installation at an RV park.  Various manufacturers have solutions below
>> 12kW, but this project will involve multiple sites in the 30-80kW range and
>> wall space is limited.  Anyone ever seen this illusive animal?
>>
>>
>> *Regards, *
>>
>> *Andrew Truitt | DRV <http://dr.ventures/>*
>> www.dr.ventures
>> d: 202.486.7507
>>
>> NABCEP Certified PV Installation Professional ID: 032407-66
>> Colorado Journeyman Electrician License No.: 600132
>>
>>
>>
>> "Don't get me wrong: I love nuclear energy! It's just that I prefer
>> fusion to fission. And it just so happens that there's an enormous fusion
>> reactor safely banked a few million miles from us. It delivers more than we
>> could ever use in just about 8 minutes. And it's wireless!"
>>
>> ~William McDonough
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>>
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & 
> settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive: 
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:www.members.re-wrenches.org
>
>
> --
> Feather River Solar Electric
> Bill Battagin, Owner
> 4291 Nelson St.
> Taylorsville, CA 95983
> 530.284.7849
> CA Lic 874049www.frenergy.net
>
>
>
> <https://www.avast.com/sig-email?utm_medium=email_source=link_campaign=sig-email_content=emailclient>
>  Virus-free.
> www.avast.com
> <https://www.avast.com/sig-email?utm_medium=email_source=link_campaign=sig-email_content=emailclient>
> <#m_1571775418369933228_m_-2621679594857588497_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

[RE-wrenches] 208V single-phase inverter options

[Andrew Truitt]

I'm in the hunt for a 208V single-phase inverter in the 15-30kW range for
installation at an RV park.  Various manufacturers have solutions below
12kW, but this project will involve multiple sites in the 30-80kW range and
wall space is limited.  Anyone ever seen this illusive animal?


*Regards, *

*Andrew Truitt | DRV <http://dr.ventures/>*
www.dr.ventures
d: 202.486.7507

NABCEP Certified PV Installation Professional ID: 032407-66
Colorado Journeyman Electrician License No.: 600132



"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

[RE-wrenches] Snow retention / removal for Lumos carports

[Andrew Truitt]

Wrenches,

We're looking at a Lumos carport project in NJ and I'm wondering if anyone
has any thoughts / recommendations / experience with how to handle snow on
carport structures.  The fact that Lumos modules are frameless adds an
unfortunate wrinkle since no existing clamp-type solutions (that I've
found) will work.  After hearing about some carports that have toppled over
under heavy snow loads we're considering just contracting with a snow
removal service, but that would be costly.  Any input would be much
appreciated.



Regards,



*Andrew Truitt*

Director of Emerging Technologies | *DIVIDEND* *SOLAR*



mobile202-486-7507 <(202)%20486-7507>

online *www.dividendsolar.com <http://www.dividendsolar.com/>*



NABCEP Certified PV Installation Professional ID: 032407-66

Colorado Journeyman Electrician License No.: 600132




"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Roof layout and proposal tools

[Andrew Truitt]

Carl - Check out the Software section of this article

for a decent overview of options.  I think Helioscope and Aurora have the
best combination of features and usability.



- Andrew



"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough

On Mon, May 8, 2017 at 10:52 PM, James Rudolph 
wrote:

> Aloha Carl,
> Have you seen or tried Helioscope?
>
> https://www.helioscope.com/
>
>
> *James B. Rudolph*
>
> *Independent** Energy Systems*
>
> *ES  Electrician ES-10816*
>
> *NABCEP Certified PV Installer # 091209-155*
>
>
> *c. 808.476.6754 <(808)%20476-6754>*
>
>
>
>
>
>
> On Mon, May 8, 2017 at 11:53 AM, Carl Adams  wrote:
>
>> Hello Wrenches,
>>
>> I've been using ModSolar for preliminary estimated and roof layout.
>> While it works OK, it can be a bit kwirky at times and the aerial imagery
>> is at times less than ideal.  I'm looking to see what else is out there?
>>
>> Carl Adams
>> SunRock Solar
>> NABCEP Certified PV Installer
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive: http://www.mail-archive.com/re
>> -wrenc...@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>>
>>
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.
> org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Aquion Batteries

[Andrew Truitt]

FYI, Aquion just went BK

.



- Andrew



"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough

On Wed, Mar 8, 2017 at 12:57 PM, John Blittersdorf <
john.blittersd...@gmail.com> wrote:

> Drake,
> I just did my first Aquion Install on an off-grid second home.  It is
> a 24V single VFX3524.  10 Aspen 24 volt stacks.  No one has been living
> there since I installed it but at least the generator stopped running 2 or
> 3 times a day just to maintain the heating system. The generator hasn't run
> at all (since the first charge) the 10 days since we installed it. I am
> waiting for the owners to come up from NYC in early April to give it the
> test.  It will get hit hard so we should know right away how it will
> respond.  I have the system monitored on OpticsRE so we will be able to see
> what is happening.  So far the batteries have stayed between 24.6 and
> 28.6.  I, too, am anxious to see what happens when we are running with the
> inverter set for the lowest setting which I think is around 39 or 40
> volts.  It will be great to have the OpticsRE control to play around with
> the AGS settings to find the most efficient settings in regard to generator
> run time.   Our #1 goal now is to minimize gen time.
>
> John Blittersdorf
> Solar Guru
> Rob Stubbins Solar
>
> On Wed, Mar 8, 2017 at 12:55 PM, Martin Herzfeld 
> wrote:
>
>> Has anyone worked with them with a Sunny Island?  Space is not an issue
>> for this client.
>>
>> Martin Herzfeld, IREC Certified Master Trainer ™ for PV Installation
>> Professional #IREC 10037
>> California Solar Contractor License  #00833782  C46, D56, D31, C-7
>> Solar, Trenching, Pole Installation & Maintenance, Instrumentation
>>
>> UL Certified PV Installer #17, OSHA 30
>> OSHA-Authorized Construction Trainer #C0068034
>> CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG
>>
>> Registered NABCEP Continuing Education (CE) Provider
>>
>>
>> On Jul 20, 2016 2:00 PM, "Jerry Shafer"  wrote:
>>
>> We had a customer request them but once we found out how many it would
>> take, he decided on the deka unigee instead. l dont like running my OB's at
>> such a low voltage as they seem to get hotter due to the higher current.
>> Some of our other product lines don't even reccomend aquions due to that
>> low voltage, suggest asking your inverter manufacture too.
>>
>> On Jul 20, 2016 10:52 AM, "Drake" 
>> wrote:
>>
>>> Hello Wrenches,
>>>
>>> I have a client who is going to take the plunge and buy a set of Aquion
>>> Batteries. They look pretty good on paper, but I'm not sure how well an
>>> inverter would function at the 40 V minimum. Does anyone have experience to
>>> recommend them or warn against using them?
>>>
>>> Thanks,
>>>
>>> Drake
>>>
>>> Drake Chamberlin
>>>
>>>
>>>
>>>
>>>
>>> *Athens Electric LLC OH License 44810 CO License 3773 NABCEP Certified
>>> Solar PV 740-448-7328 <740-448-7328> *http://athens-electric.com/
>>>
>>> ___
>>> List sponsored by Redwood Alliance
>>>
>>> List Address: RE-wrenches@lists.re-wrenches.org
>>>
>>> Change listserver email address & settings:
>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>>
>>> List-Archive: http://www.mail-archive.com/re
>>> -wrenc...@lists.re-wrenches.org/maillist.html
>>>
>>> List rules & etiquette:
>>> www.re-wrenches.org/etiquette.htm
>>>
>>> Check out or update participant bios:
>>> www.members.re-wrenches.org
>>>
>>>
>>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive: http://www.mail-archive.com/re
>> -wrenc...@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>>
>>
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive: http://www.mail-archive.com/re
>> -wrenc...@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>>
>>
>
> ___

Re: [RE-wrenches] Whole house energy moniters

[Andrew Truitt]

Whisker Labs  just announced a
product that monitors individual loads / sources through digital
disaggregation (like Sense) but using a sensor that adheres to the main
panel, eliminating the need to remove the deadfront to attached CTs.
Pretty crazy.  Connectivity is through the existing network.

Other CT-based options beyond what's been mentioned include neurio
 (existing network), the Locus LGate 101e
 (cellular or existing
network), TED  (existing
network), and the Enphase Envoy-S

(which can monitor non-enphase systems and is cellular).

There's another product just now coming to the US from Australia called
CarbonTrack  (cellular).  Whole home + PV
energy monitoring (CTs), zigbee / z-wave 2-way communications with
smarthome devices, communicates with energy storage... basically an
energy-focused smarthome hub.  Lots going on in this space!



- Andrew



"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough

On Mon, Dec 5, 2016 at 8:43 AM, Philip Boutelle 
wrote:

> This product by Sense is similar to CURB (or eGauge
> , or other multiple-CT devices), but you install
> a single set of CTs on the main feeds (plus on on the solar if you have
> it). The device then 'learns the electronic signature' of the loads in the
> house to disaggregate what is being used. I haven't tried one yet.
> https://sense.com/
>
> I have previously installed a beta device from Verdegris, which does the
> same thing (single CT set) but is geared for commercial customers, whereas
> Sense is residential.
> http://verdigris.co/
>
> -Phil
>
>
> --
>
> *Phil Boutelle,* *PE, CEM* |   Energy Engineer
> philboute...@gmail.com   |   M (831) 359-5268 <%28831%29%20359-5268>
>
>
>
>
>
>
> On Mon, Dec 5, 2016 at 6:01 AM, William Dorsett 
> wrote:
>
>> There is a new one mentioned in SolarPro, from a company called CURB
>> http://energycurb.com/) . CURB gives CT’s for eighteen different
>> circuits so over time you can understand how each load is performing. One
>> of our families had a broken pump shaft so it never registered that there
>> was more water in the pressure tank, so it ran for weeks. The site mentions
>> that they will be able to predict appliance failure from historical data.
>> And it can monitor overall PV generation. It looks very promising though
>> from the reviews it may not yet allow a download of historical data. It
>> would be great if in addition to logging data, it would allow active
>> management of interlocking relays to control demand charges. There is
>> another product called Energy Sentry (http://energysentry.com/ ) , that
>> allows you to prioritize your large loads so they aren’t allowed to all
>> come on at the same time. As more utilities add Time of Use and demand
>> charges this will be a really valuable piece of hardware. For installers
>> this will become just another value added service. These two companies
>> should merge.
>>
>>
>>
>> Bill Dorsett
>>
>> Manhattan, KS
>>
>>
>>
>> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
>> Behalf Of *Jerry Shafer
>> *Sent:* Sunday, December 04, 2016 2:42 AM
>> *To:* Peter Talmage; RE-wrenches
>> *Subject:* Re: [RE-wrenches] Whole house energy moniters
>>
>>
>>
>> Peter
>>
>> is this system CT based, can you turn around the CT's as when in most
>> cases installation says to install directional and for solar they get
>> installed backwards instead.
>> Jerry
>>
>>
>>
>> On Sat, Dec 3, 2016 at 2:25 PM, Peter Talmage  wrote:
>>
>> Does anyone have experience with whole house energy monitors that work
>> with interfaced PV arrays. It seems most just deal with the array output as
>> a load .
>>
>>
>>
>> Thanks.  Peter Talmage
>>
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive: http://www.mail-archive.com/re
>> -wrenc...@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>>
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> 

[RE-wrenches] In search of an awesome PV shade structure

[Andrew Truitt]

Good afternoon wrenches!  Does anyone know of a custom fabricator who might
be able to manufacture a shade structure that meets the following criteria
for a project in NJ?

   - fully protects anything underneath from the elements, preferably with
   some type of weatherproof membrane under the array
   - incorporates a gutter (or similar) to address runoff and snow sloughing
   - can support ~40kW of PV in a footprint approximating a square, with
   columns at the 4 corners
   - aesthetically pleasing


Thanks in advance!


- Andrew



"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Enphase Support Non-Responsive

[Andrew Truitt]

Is anyone familiar with the new Kaco Ultraverter
<http://kaco-newenergy.com/lounge/ultraverters/>?  Its a microinverter with
series-connected string architecture *on the AC side*!  Pretty crazy.  They
say the lower voltages (nothing over 60V on the AC or DC side of each unit)
reduces stress on components and allows for greater durability.  Rapid
Shutdown compliant for 2014 and 2017.  97.5% CEC efficiency.  Pricing
targeted between SolarEdge and Enphase, but willing to get very aggressive
at rollout.  As 100 year old German company, Kaco's 25-year warranty may
offer a little more value compared with some other MLPE manufacturers.
The biggest downside that I can see, assuming it works like its supposed
to, is the 8-12 inverter-per-AC-string requirement.  I'd be very interested
to hear this esteemed group's thoughts on this unusual new microinverter
product!




For a brighter energy future,


Andrew Truitt

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile <https://www.linkedin.com/in/andrewtruitt>

Company Website <http://truittreconsulting.weebly.com/>

NABCEP Certified PV Installation Professional ID: 032407-66

Colorado Journeyman Electrician License No.: 600132

<%28202%29%20486-7507>

[image: 24 copy.jpg]

"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough












On Fri, Aug 5, 2016 at 8:31 AM, William Dorsett <wmdors...@sbcglobal.net>
wrote:

> We are finding the same problem. Usually it is a problem with an untypical
> Envoy location (remote barn with a tin roof or a bad cable modem
> connection)
> or communications issues between the inverters and the Envoy. Nearly all
> our
> systems are operating as expected, and I think the company has good
> hardware
> and is otherwise well put together.  Customer responsiveness falls way
> short. Their service people are always quite helpful when they do get back
> to us.  There appears to be a route to remote troubleshooting but it
> certainly not publicized well.  Can anyone tell installers how to connect
> with a remote troubleshooting URL?
>
> Thanks all.
>
> Bill Dorsett
> Manhattan, KS
>
> -Original Message-
> From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
> Behalf Of penobscotso...@midmaine.com
> Sent: Friday, August 05, 2016 8:38 AM
> To: RE-wrenches
> Subject: Re: [RE-wrenches] Enphase Support Non-Responsive
>
> Just to renew this line of conversation, I have been waiting for several
> call backs form Enphase, with no results, for the past three weeks. I also
> have warranty claims that go back four months+ that have not been
> fulfilled.
> I will not sell any more Enphase, at all, until they resolve these
> communication and warranty issues.
>
> Daryl DeJoy
> NABCEP Certified PV Installer
> Penobscot Solar Design
>
>
>
>
> > It seems like we are talking about inverter and module customer
> > service (good and bad) a lot lately.
> >
> > Has anyone else noticed that Enphase seems to have stopped responding
> > to tickets submitted via their website? Hold times are unacceptable,
> > so I gave up on that, but nobody gets back to you when you try to
> > contact them via their web form for weeks, even about an existing RMA
> > or ticket, and they no longer let you update tickets by email. They
> > are very helpful and competent if you get them on the phone, but who
> > has time for that?!
> >
> > I'm also waiting an unacceptable amount of time on a major module
> > manufacturer warranty claim right now. I'd love to see Home Power or
> > someone do a story on manufacturer responsiveness to dealers. Things
> > are generally going down hill it seems.
> >
> > Jason Szumlanski
> > Florida Solar Design Group
> > ___
> > List sponsored by Redwood Alliance
> >
> > List Address: RE-wrenches@lists.re-wrenches.org
> >
> > Change listserver email address & settings:
> > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
> >
> > List-Archive:
> > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist
> > .html
> >
> > List rules & etiquette:
> > www.re-wrenches.org/etiquette.htm
> >
> > Check out or update participant bios:
> > www.members.re-wrenches.org
> >
> >
>
>
> ___
> List sponsored by Redwood Alliance
>
&

Re: [RE-wrenches] Successor to SunEye 210?

[Andrew Truitt]

I think the fact that no manufacturer has jumped in to fill the void left
by the SunEye is an indicator that remote shade analysis tools like Aurora
(my favorite) are the likely path forward for the industry.  These tools
can typically make it possible to generate a full rendering and shade
analysis in less than 15 minutes for the experienced user, without ever
having to get on a roof.  NREL did some validation studies (here's Aurora's
<http://www.nrel.gov/docs/fy16osti/65558.pdf>) and found a few tools to
produce results as good or better than the SunEye, which makes sense to me
since the analysis is based on an integral over the whole roof surface as
opposed to a few point measurements.  Of course the "garbage in, garbage
out" principle is very applicable.




For a brighter energy future,


Andrew Truitt

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile <https://www.linkedin.com/in/andrewtruitt>

Company Website <http://truittreconsulting.weebly.com/>

NABCEP Certified PV Installation Professional ID: 032407-66

Colorado Journeyman Electrician License No.: 600132

<%28202%29%20486-7507>

[image: 24 copy.jpg]

"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough








On Mon, Mar 7, 2016 at 12:56 PM, Dan Fink <danbo...@gmail.com> wrote:

> Hi Peter;
> My understanding is that the only thing left of Solmetric at Vivint is the
> PV Analyzer, and though they stated a year ago that they were going to
> "streamline" the PV sales process so that the site survey could be
> accomplished on the same day as the sale, I've seen nothing else from them.
> Very happy that I've kept the heavily-modded Solar Pathfinder that I
> bought in 1994, with a real tripod adaptor.
> For quicky site surveys and semi-interested customers, I use an Android
> smartphone app, which is pretty accurate IF you build a tripod adaptor for
> the phone.
> I'm surprised someone hasn't leapt in to claim this market share. Not all
> of us are big-city no-battery PV installers who can use the new Google tool
> that  estimates tree heights. My class experiments with this were a
> bustit only sorta kinda works.
> Ground truth is the only thing I trust. Maybe I should just start building
> and marketing my Pathfinder and smartphone tripod adaptors.
>
>
> Dan Fink
> Adjunct Professor, Ecotech Institute
> IREC Certified Instructor™ for:
> ~ PV Installation Professional
> ~ Small Wind Installer
> Executive Director, Buckville Energy
> NABCEP Accredited Continuing Education Providers™
> 970.672.4342
>
>
>
> On Mon, Mar 7, 2016 at 10:27 AM, Peter Parrish <
> peter.parr...@calsolareng.com> wrote:
>
>> Can’t seem to find a SunEye product on the Solmetric website. Is it
>> tucked away on the Vivent site or somewhere else hard-to-find?
>>
>>
>>
>> Peter T. Parrish, Ph.D.
>>
>> President, SolarGnosis
>>
>> 1107 Fair Oaks Ave.
>>
>> Suite 351
>>
>> South Pasadena, CA 91030
>>
>> (323) 839-6108
>>
>> peter...@pobox.com
>>
>> ___
>> List sponsored by Redwood Alliance
>>
>> List Address: RE-wrenches@lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> List-Archive:
>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>>
>> List rules & etiquette:
>> www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> www.members.re-wrenches.org
>>
>>
>>
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Drawing Programs

[Andrew Truitt]

Aaron - There are a number of cool PV-specific tools that have GIS-aided
rendering functionality along with features like shade analysis, production
estimation, and automated line diagram and BoM generation.  My 2 favorites
are Helioscope and Aurora.



For a brighter energy future,


Andrew Truitt

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile <https://www.linkedin.com/in/andrewtruitt>

Company Website <http://truittreconsulting.weebly.com/>

NABCEP Certified PV Installation Professional ID: 032407-66

Colorado Journeyman Electrician License No.: 600132

<%28202%29%20486-7507>

[image: 24 copy.jpg]

"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough








On Mon, Jan 11, 2016 at 9:37 AM, Aaron Mandelkorn <reoso...@gmail.com>
wrote:

> Hi all,  Just wondering what drawing programs you all use (for windows).
> I have been a happy user of MacDraft for years but have recently switched
> back over to windows.  AutoCAD is way more complex for what I need.  All I
> draw are simple 3 lines for permitting, site plans, and roof layouts.  No
> need for complicated tools, just the ability to draw in scale. Any
> thoughts?
>
>
> Aaron Mandelkorn
> Owner/Solar Specialist
> Renewable Energy Outfitters
> www.reosolar.com
> www.offgriddepot.biz
> 970-596-3744
> 719-221-5249
> reoso...@gmail.com
>
> ___
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches@lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> List-Archive:
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>
>
>
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Solar edge

[Andrew Truitt]

They might be referring to the alleged upcoming release of a SolarEdge / Tesla 
Powerwall integration that is currently in the works. I think it's supposed to 
leverage the similar SE output and Powerwall input voltages.  
 

- Andrew Truitt


Please excuse brevity and typos, this message was typed on tiny keys. 

> On Nov 5, 2015, at 7:52 PM, Jay <jay.pe...@gmail.com> wrote:
> 
>> Hi all
> 
> Solar edge doesn't make any optimizers for battery based systems, right? Just 
> their standard string grid tie ones. 
> 
> I've got a client who's telling me they do. 
> 
> Just checking
> 
> Thanks
> 
> Jay
> 
> Peltz power. 
> ___
> List sponsored by Redwood Alliance
> 
> List Address: RE-wrenches@lists.re-wrenches.org
> 
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
> 
> List-Archive: 
> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
> 
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
> 
> Check out or update participant bios:
> www.members.re-wrenches.org
> 
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

[RE-wrenches] Conduit across walkways

[Andrew Truitt]

Wrenches - What is your take on conduit across walkways on commercial
rooftops?


[image: Inline image 1]


The 2012 IFC says The DC combiner boxes shall be located such that conduit
runs are minimized in the pathways between arrays. so that would indicate
that this is acceptable.  Is there anything in the NEC or OSHA that
requires some type of step or protection for conduits in access walkways?
I am concerned with a scenario where the conduit is covered with snow and
becomes an even bigger trip hazard and potential source of damage to the DC
conductors.



For a brighter energy future,


Andrew Truitt

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile
https://tracking.cirrusinsight.com/079df0b1-ab1c-4515-b1e0-d7a6f92238bd/linkedin-com-in-andrewtruitt

Company Website
https://tracking.cirrusinsight.com/079df0b1-ab1c-4515-b1e0-d7a6f92238bd/truittreconsulting-weebly-com

NABCEP Certified PV Installation Professional ID: 032407-66

Colorado Journeyman Electrician License No.: 600132

 %28202%29%20486-7507

[image: 24 copy.jpg]

Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Redwood Alliance

List Address: RE-wrenches@lists.re-wrenches.org

Change listserver email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: 
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Warranty replacements

[Andrew Truitt]

Jason et al - Next Phase Solar http://nextphasesolar.com/ is currently
working to address this very issue.  NPS will roll a truck to handle
service issues (residential or commercial) so installers can focus on
installing.  Adam Burstein (NPS Founder and CEO) is a long-time industry
veteran going back to the PowerLight days and has built a very competent
service / OM team.  They have a pretty broad footprint but they aren't
everywhere yet, though I know he is interested in expanding into new
markets if the demand is there.



For a brighter energy future,


Andrew Truitt

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile https://www.linkedin.com/in/andrewtruitt

Company Website http://truittreconsulting.weebly.com/

NABCEP Certified PV Installation Professional ID: 032407-66

Colorado Journeyman Electrician License No.: 600132

 %28202%29%20486-7507

[image: 24 copy.jpg]

Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough









On Thu, Oct 16, 2014 at 7:06 AM, Jason Szumlanski ja...@szumlanski.com
wrote:

 Frankly, our issue is the UNsteady stream of service issues with both
 string and microinverters. There isn't enough warranty or non-warranty
 service work and it is too unpredictable to justify a dedicated PV service
 department with dedicated personnel that can run economically. As a result,
 we have to pull install crews from active installations to handle these
 issues, which is neither economical nor good for our installation business.
 As much as PV service is an annoyance for system owners, it's a huge
 distraction for a small dealer. In fact, one competitor refuses to service
 the systems they install. We have been picking up service business as a
 result (we have a reputation for doing so and manufacturers call us), but
 it's still not steady enough to handle well.

 Jason Szumlanski
 On Oct 15, 2014 4:41 PM, Rebecca Lundberg 
 rebecca.lundb...@powerfullygreen.com wrote:

 We are starting to see a fairly steady stream of various solar
 electronics needing replacement under warranty, including micro-inverters,
 AC modules (microinverter failing), and even modules with an integrated DC
 electronic component failing to work from the get go. I work with
 residential customers and care about doing right by them, and of course
 they expect that their warrantied part will be replaced at no cost to them,
 they have already invested a lot in their solar project. Sometimes the
 manufacturer has a stipend which at least offsets the cost of gas but does
 not cover time to travel to the site and do the replacement, but I have
 recently come across several manufacturers who do not give any stipend at
 all and I am surprised at that. Replacing a module in the middle of a
 pitched roof is no small feat, and getting to micro inverters on a steep
 pitch is always a challenge. As the code requires more safety features down
 to the module level, I suspect we will see more and more of this, and the
 electronics are no longer at ground level and easily accessible. What ideas
 do you have about how to deal with this? Must we have an O and M contract
 with every customer given current product choices?

 A similar question relates to a particular module having issues
 with delamination and failed diodes. We have been called out to several
 sites where this has caused the inverter to sense a fault, and testing
 showed the module leaking voltage to ground. Who is responsible for getting
 the inverter up and running when it clearly stems from the module? I
 suspect the module manufacturer's warranty legally exempts them from
 responsibility, but again it is reasonable for the customer to expect a
 warrantied system to be up and running.

 Thoughts from the field?

 Sincerely,
 Rebecca Lundberg



 --
 Rebecca Lundberg
 NABCEP Certified Solar PV Installer ®
 Owner/President
 *Powerfully Green*®
 763.438.1976 | rebecca.lundb...@powerfullygreen.com

 Powered by the Sun!




 ___
 List sponsored by Redwood Alliance

 List Address: RE-wrenches@lists.re-wrenches.org

 Change listserver email address  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out or update participant bios:
 www.members.re-wrenches.org



 ___
 List sponsored by Redwood Alliance

 List Address: RE-wrenches@lists.re-wrenches.org

 Change listserver email address  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://www.mail-archive.com/re-wrenches@lists.re

[RE-wrenches] NEC Plus

[Andrew Truitt]

Wrenches - After being unable to log into my favorite NEC research tool, I
just found this on the Mike Holt Forum:

NFPA has decided to stop offering NECPlus yearly subscriptions, because
the 2014 NEC will not be going into NECPlus. The last day of access to
NECPlus will be on February 28, 2014.

There will be no subscription replacement product, however there will be an
enhanced eBook product for the 2014 NEC - with changes (from the 2011 NEC)
identified. This will be a one-time purchase product (not a subscription).
The 2014 NEC enhanced eBook will provide our customers with more mobility
(via use on tablets and smartphones) and it will include features such as
bookmarking, user notes, and highlighting options.

*NEC Connect* is our new online resource and community for all things
related to the National Electrical Code. Learn about the latest in
electrical safety, wiring, guidelines, and equipment, along with upcoming
electrical code updates, tips and the latest social updates from the NFPA.
NEC Connect is your one-stop shop for residential and industrial electrical
safety, whether you are an installer, designer, inspector or policy maker.
Join fellow contractors and engineers, and sample the latest video content,
articles and more from industry experts.


Does anyone have any experience with this eBook?


RIP NECPlus.  FYI, though the NFPA never really advertised it they did
develop a PV-specific NEC app product called PV-NEC http://pvnec.org.  It
contains inspection and installation checklists (Based on NABCEP and Bill
Brooks documentation), lookup table tools, a project management function,
and 2 versions each of the 2008 and 2011 NEC - a full version and a
PV-specific version.  They were going to roll it out at SPI 2013 but
changed their mind.  They were also going to update it to 2014 but
unfortunately changed their mind on that as well...



For a brighter energy future,


Andrew Truitt

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/

NABCEP Certified PV Installation Professional ID: 032407-66

Colorado Journeyman Electrician License No.: 600132

 %28202%29%20486-7507

[image: 24 copy.jpg]

Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
inline: image001.jpg___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Change email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

[RE-wrenches] EGC ground impedance

[Andrew Truitt]

Wrenches - What do you consider to be a safe ground impedance for a PV
array equipment grounding conductor?  NEC2011 250.53(A) says that if the
impedance between the grounding *electrode* and earth is less than 25 ohms
then no supplementary grounding electrode is needed, but I'm not clear on
what that means for the ground impedance measurement within the array.  For
example, I am inspecting a ballasted landfill system (i.e. no penetrating
the earth allowed - just a UFER at the equipment pad) where the ground
impedance at the GEC is very low (1 Ohm), but the array EGCs are showing
ground impedances of between 500 and 1000 Ohms.  The EGCs (#4) are
connected to Cope cable trays, which are in turn connected to the inverter
grounding bar via #4 bonding jumpers.  The cable tray is grounded per
manufacturer specs (large bonding jumpers at each joint), but the runs can
be quite long (300'+) with many connections, though nothing appears to be
loose.  I intend to recommend that continuous conductors be installed to
reduce array ground impedance, but any input on the issue would be very
much appreciated.



For a brighter energy future,


Andrew Truitt

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/

NABCEP Certified PV Installation Professional ID: 032407-66

Colorado Journeyman Electrician License No.: 600132

 %28202%29%20486-7507

[image: 24 copy.jpg]

Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
image001.jpg___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Change email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

[RE-wrenches] Sunlight Resistant THWN-2

[Andrew Truitt]

Wrenches - Is anyone familiar with sunlight resistant THWN-2?  I'm
inspecting a groundmount on a Landfill where all PV Output Circuit wiring
is in exposed cable tray (since they can't dig) and they are using
SouthWire SIMpull sunlight resistant THWN-2 conductors.  NEC2011 690.31(B)
specifies USE-2 or PV Wire for Source Circuit wiring and module
interconnection, but doesn't address Output Circuit wiring.  Here are the
specs for the wire types used:

http://www.southwire.com/products/SIMpullAluminumT90.htm

http://www.southwire.com/products/SIMpullTHHNCableAlumflexConductors.htm


Is this legit?



For a brighter energy future,


Andrew Truitt

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/

NABCEP Certified PV Installation Professional ID: 032407-66

Colorado Journeyman Electrician License No.: 600132

 %28202%29%20486-7507

[image: 24 copy.jpg]

Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
image001.jpg___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Change email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

[RE-wrenches] Off-grid in Tanzania

[Andrew Truitt]

Wrenches - I am working with Lee Bristol and Ray Walters on 20 off-grid PV
systems in Tanzania at various types of remote health care facilities.
 There will be 3 system offerings: 2, 4, and 6 kW, all 230V, 50Hz.  We are
currently considering the following issues and would appreciate input:

   - *AC coupled SMA system vs. DC coupled Outback/Midnite system*: We have
   had positive experiences with Sunny Boy / Sunny Island systems in GT w/
   battery back-up applications and we like the SMA production monitoring
   (more on that later), but we are not sure how appropriate the system is for
   off-grid.  Cost is a consideration, as well as energy harvest, simplicity
   for in-county technicians, future system expansion, battery SOC remote
   monitoring, integration of generators, running power to multiple buildings,
   inverter over-sizing to increase equipment lifetime, reliability, battery
   over/under-charging prevention, ease of use for the customer, surge
   capability, and programable load shedding.  We have had numerous internal
   discussions about this particular decision and would appreciate additional
   viewpoints.
   - *Ground mount vs. Pole mount*: The roofs at the sites are far from
   ideal in both construction and solar access so we are planning to locate
   all the arrays on the ground.  Soil types and slopes vary.  Manual labor
   will be readily available but heavy equipment will be hard to come by.  We
   would like to have a standard, replicable system which might be more
   achievable with a pole mount (e.g. [8] 250W modules per pole for 2kW; 1, 2,
   or 3 poles per system), and poles might be easier to have pre-installed
   before we arrive (e.g. you can't get the orientation wrong; less spacing
   measurements to consider), but the cost difference is significant (about
   $0.40/watt for S-flex ground mount vs. $1.05/watt for DPW TPM all in).
The pole mount would be adjustable (east/west to account for micro-climate
   variations, north/south for seasonal adjustments), but how much of a value
   does that add at 10 degrees south latitude?  A ground mount could be
   ballasted which could be a big benefit in some locations.
   - *Monitoring options*: This is a tough one.  Obviously there is not
   robust internet access so we are looking at cell modems for data
   transmission.  Does anyone have a recommendation for a 3rd party off-grid
   full system remote monitoring provider?  Pentametric is an option - anyone
   have experience with the on-line interface or remote monitoring
   reliability?  All the OEMs have monitoring options for production and
   battery SOC, but we want to have an additional system to compare data and
   provide redundancy.

Clearly there are many more factors that go into these decisions than I
have conveyed here, but we are just hoping to get some thoughts on the
issues from the extensive off-grid knowledge base on this list,
particularly from anyone with experience in Africa.

Thanks in advance!



For a brighter energy future,


Andrew Truitt

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/

NABCEP Certified PV Installation Professional ID: 032407-66

Colorado Journeyman Electrician License No.: 600132

 %28202%29%20486-7507

[image: 24 copy.jpg]

Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
image001.jpg___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Change email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Who has the best overall solar racking solution?

[Andrew Truitt]

Zep Solar has a nice product for sloped roofs, particularly asphalt shingle. 
They have 15 or so module manufacturers making panels that are Zep compatible. 
The layout takes a little more time and shingles do occasionally need to be 
cut, but the lack of rail makes for a very smooth and very clean looking array 
installation. 

- Andrew


Sent from my iPhone

On Sep 11, 2013, at 1:34 PM, Larry Crutcher, Starlight Solar Power Systems 
la...@starlightsolar.com wrote:

 Back in the 1980's we used a company called Baird (www.bairdmounts.com) to 
 engineer NPR mounts for satellite communication antennas. I have used many of 
 their products for antennas up to 5 meters and never a failure or problem. I 
 have not used their mounts for PV solar but I expect their quality has 
 endured.
 
 Larry
 
 
 
 
 
 
 On Sep 10, 2013, at 3:11 PM, Jay Peltz j...@asis.com wrote:
 
 Sub question/
 
 Best ballasted flat roof rack?
 
 Jay
 Peltz power
 
 Sent from my iPhone
 
 On Sep 10, 2013, at 1:04 PM, James Rudolph jamesrudolp...@gmail.com wrote:
 
 Greetings Fellow Wrenchies,
 With all the racking options out there today, are there any stand outs in 
 terms of quality and installation time.
 We are in the process of evaluating our racking system and with all the 
 options its a little mind boggeling.
 
 Mahalo in advance!
 
 
 
 
 James B Rudolph
 Heleakala Solar 
 Director of Construction
 NABCEP Certified PV Installer
 Licensed ES Electrician
 ___
 List sponsored by Home Power magazine
 
 List Address: RE-wrenches@lists.re-wrenches.org
 
 Change email address  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
 
 List-Archive: 
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
 
 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm
 
 Check out participant bios:
 www.members.re-wrenches.org
 
 
 ___
 List sponsored by Home Power magazine
 
 List Address: RE-wrenches@lists.re-wrenches.org
 
 Change email address  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
 
 List-Archive: 
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
 
 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm
 
 Check out participant bios:
 www.members.re-wrenches.org
 
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Change email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] double insulated wire

[Andrew Truitt]

I have also seen the color convention that Ray enumerated becoming the 
standard. The one variation (which I like) is to use the following for the 
positively grounded legs of a bi-polar system:

Black = negative; GREY = positive

This can help prevent confusion between the two different grounded conductors. 


- Andrew



Sent from my iPhone

On Jun 28, 2013, at 12:54 PM, Ray Walters r...@solarray.com wrote:

 The convention of red for positive and black for negative is not just 
 automotive.  It is also used by all battery based inverter manus, all battery 
 companies, and all multimeters.
 John Wiles also agrees; 
 red = positive, black = negative  for ungrounded systems
 red = positive, white = negative for negative grounded systems
 white = positive, black = negative for pos grounded systems.
 I take it a step further, and use white label tape with red lettering that 
 says + positive ground + ,
 because I've seen so many problems with positive grounded systems, and people 
 not getting polarity correct.
 All of this is NEC compliant, and follows standard conventions.
 Make it easy on yourself and your journeymen on a hot roof, and have your 
 color coding match their multimeter.
 You might save an inverter or even a life.
 R.Ray Walters
 CTO, Solarray, Inc
 Nabcep Certified PV Installer, 
 Licensed Master Electrician
 Solar Design Engineer
 303 505-8760
 On 6/28/2013 12:09 PM, Allan Sindelar wrote:
 On 6/28/2013 11:47 AM, a...@aramsolar.com wrote:
 And of course Red for positive and black for negative. 
 Most building departments have not pick up on this yet.   But 
 they will.  
 Aram
 
 Where does of course Red for positive and black for negative come from, 
 please? I only know it as an automotive standard that has often caused 
 confusion when used by DIY offgridders in years past, as black thus could 
 represent either positive or negative in a DC conductor pair. 
 Is there yet a convention for ungrounded arrays? While red and black are 
 technically correct as ungrounded current-carrying conductors, use of this 
 color convention could cause as much confusion as resolve it in the future. 
 How about black and black or for that matter yellow and orange (if 
 supplied by manufacturers) for ungrounded arrays?
 Thanks, Allan
 
 Allan Sindelar
 al...@positiveenergysolar.com
 NABCEP Certified PV Installation Professional 
 NABCEP Certified Technical Sales Professional
 New Mexico EE98J Journeyman Electrician
 Founder and Chief Technology Officer
 Positive Energy, Inc., a Certified B CorporationTM
 3209 Richards Lane
 Santa Fe, New Mexico 87507
 505 424-1112 office 780-2738 cell
 www.positiveenergysolar.com
  
 
 
 
 ___
 List sponsored by Home Power magazine
 
 List Address: RE-wrenches@lists.re-wrenches.org
 
 Change email address  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
 
 List-Archive: 
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
 
 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm
 
 Check out participant bios:
 www.members.re-wrenches.org
 
 
 ___
 List sponsored by Home Power magazine
 
 List Address: RE-wrenches@lists.re-wrenches.org
 
 Change email address  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
 
 List-Archive: 
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
 
 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm
 
 Check out participant bios:
 www.members.re-wrenches.org
 
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Change email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

[RE-wrenches] Thermal imaging

[Andrew Truitt]

Wrenches - I am considering the purchase of a thermal imaging camera for PV
system commissioning applications.  Prices seem to range from $1,000 to
$10,000+.  Primary manufacturers seem to be Fluke and Flir, with Extech,
Ideal and Milwaukee offering a few products as well.  It seems to me that
the key factors to consider are temperature range, thermal sensitivity,
screen resolution, screen size, battery life, type of image capture and
price.  Does anyone have experience with using thermal imaging to identify
temperature irregularities in modules and/or electrical equipment?  What
temperature range, thermal sensitivity, and screen resolution is needed for
both/either of these tasks?  What have been the key factors/specifications
in terms of ergonomics and functionality?  Any preferences in terms of
manufacturer?



For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installation Professional™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/
 %28202%29%20486-7507


[image: 24 copy.jpg]

Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
image001.jpg___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Change email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

[RE-wrenches] Staying current on Codes and Standards

[Andrew Truitt]

Greetings!  I am looking for resources / strategies for staying current on
all codes and standards that relate to PV project development.  I.e.
anything from the IEEE, UL, and ASTM standards that govern product testing
up through the ICC i-codes (IBC, IRC, IFC...), NFPA codes, and ASHRAE
standards that relate to system design and construction and also anything
like IEC 62446 that relate to documentation, commissioning and OM.  It's
quite an alpha-numeric soup out there - how do you ensure that each
department in your company stays current on the codes and standards that
effect their operation?


For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installation Professional™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/
 %28202%29%20486-7507



Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Change email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] seimens QP 20 A 240 V breaker backfeed

[Andrew Truitt]

Gary - I'm not sure what the application is, but if you are trying to
convince an AHJ that this breaker is suitable for backfeed (i.e. approved
for current flow in both directions) then you can just point the to the
Code:


*NEC 2011 705.12(D)(5) Suitable for Backfeed. Circuit breakers, if backfed,
shall be suitable for such operation.  See related
ROPhttp://code.necplus.org/document.php?id=necss%3A70-2011%3Anecs70-705.12#
ULhttp://code.necplus.org/document.php?id=necss%3A70-2011%3Anecs70-705.12#
*
* *

*Informational Note: Circuit breakers that are marked “Line” and “Load”
have been evaluated only in the direction marked. Circuit breakers without
“Line” and “Load” have been evaluated in both directions.  *


For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installation Professional™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/
 %28202%29%20486-7507




Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough








On Tue, Apr 23, 2013 at 11:23 AM, Carl Adams swingjun...@gmail.com wrote:



 -Forwarded on behalf of Gary Easton at ARP-Solar


 With Regards
 Carl Adams, President
 SunRock Solar, LLC
 513.290.9072 (cell)
 513.766.6025 (office)



 -- Forwarded message --
 From: gary easton g...@arp-solar.com
 Date: Tue, Apr 23, 2013 at 1:12 PM
 Subject: backfeeding breakers
 To: RE-wrenches re-wrenches@lists.re-wrenches.org


 Hello,
 Can anyone point me to the data sheet indicating the reverse feed
 capability of a seimens QP 20 A 240 V breaker?

 --
 Gary Easton
 Appalachian Renewable Power
 Stewart, Ohio 45778
 NABCEP Certified Solar PV

 T: 740-277-8498
  www.arp-solar.com

 “First they ignore you. Then they laugh at you. Then they fight you. Then
 you win.”
 ~Ghandi




 --
 Gary Easton
 Appalachian Renewable Power
 Stewart, Ohio 45778
 NABCEP Certified Solar PV

 T: 740-277-8498
  www.arp-solar.com

 “First they ignore you. Then they laugh at you. Then they fight you. Then
 you win.”
 ~Ghandi




 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Change email address  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Change email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Enphase Wire Management

[Andrew Truitt]

Aaron - Zep makes a bracket for supporting Enphase connectors which is quite 
robust:

http://www.zepsolar.com/images/files/components/pdf/Enphase-Connector-Bracket-RevD-Writing_CLI.pdf

Of course it is intended for use with Zep compatible modules. 

- Andrew


Sent from my iPhone

On Apr 12, 2013, at 1:02 PM, All Solar allso...@scswifi.net wrote:

 Iron ridge has some wire clips that will also fit Unirac rails
 
 Sent from Jeremy's IPhone.  Sorry for typos and shorthand!
 
 On Apr 11, 2013, at 6:52 PM, Aaron Mandelkorn reoso...@gmail.com wrote:
 
 Just wondering what people like to use for supporting the trunk cable for 
 the enphase 215 inverters.  WIth zipties going brittle after a couple of 
 years aluminum or steel options are what I am more interested in.  I have 
 seen some installs with steel zipties but the sharp edge on them makes me 
 wonder if there is a chance of them cutting into the cable.   I have used 
 3/8 one hole conduit straps on each side of the trunk cable connector and 
 although this seems quite stout it gets expensive on larger systems.  Any 
 ideas about products out there for supporting the trunk cable for the life 
 of the system?
  
 Aaron Mandelkorn
 NABCEP Certified PV Installer
 Renewable Energy Outfitters
 Box 65 Salida, CO. 81201
 (970)596-3744
 ___
 List sponsored by Home Power magazine
 
 List Address: RE-wrenches@lists.re-wrenches.org
 
 Change email address  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
 
 List-Archive: 
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
 
 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm
 
 Check out participant bios:
 www.members.re-wrenches.org
 
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Change email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Cable tray

[Andrew Truitt]

Bill - What is your take in conductor insulation degradation over time when 
exposed to UV? Regardless of the sunlight resistant labeling, USE-2 (and I 
assume PV wire though I haven't seen it yet) does show wear after years of 
exposure to direct sunlight.  Maybe best practice would be to use cable trays 
where conductors are shaded and [properly installed] conduit when exposed to 
direct UV?

- Andrew Truitt


Sent from my iPad

On Mar 26, 2013, at 11:55 PM, Bill Brooks billbroo...@yahoo.com wrote:

 William,
  
 I have all the respect in the world for you, but I’m not referring to “basket 
 tray”, which is only appropriate for small conductors. I’m talking about 
 legitimate cable tray that can be up to 12” wide and that has a top and rungs 
 every 12”. The main facilities that use it in the United States are large 
 industrial facilities. Most electricians don’t get to work with it. It is 
 clearly superior to EMT and is at least as good as IMC without all the hassle 
 of threaded fittings and setting up expansion joints and worrying about 20 
 years of conductors thermal cycling. Even the best electricians have problems 
 with this stuff.
  
 I am talking about projects with 800 foot long feeder runs. We can bring them 
 in the building and build a rack for the conduit or run covered tray outside. 
 As the 2014 NEC will require, you will have to use contactor combiners or 
 some other means to shut down the conductors inside a building. It’s all 
 doable. My recommendation after seeing the aftermath of rooftop conduit by 
 good electricians is to put cable tray on roofs and use conduit if you bring 
 the feeders indoors. It will become common practice soon. Hopefully sooner 
 than later.
  
 Bill.
  
 From: re-wrenches-boun...@lists.re-wrenches.org 
 [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller
 Sent: Tuesday, March 26, 2013 9:49 PM
 To: RE-wrenches
 Subject: Re: [RE-wrenches] Cable tray
  
 Bill:
 
 I have to disagree with you on this one.  We can not abandoned a tried and 
 true practice just because some practitioners don't do it right.  I don't 
 know how one can justify saying that encapsulating high voltage conductors in 
 a conduit is less safe than exposed in a flimsy basket.  Consider snow and 
 ice and falling objects.
 
 Too many installers entered the PV field without first acquiring the 
 necessary skills as journeymen or women electricians.  I don't see the 
 benefit of rewriting the code to accommodate a lack of skills in the industry.
 
 Respectfully,
 
 William Miller
 
 PS:  The temperature adders always encourage us to enter the building 
 envelope at the first appropriate location to avoid adding them.  Thoughtful 
 installers will do the same.
 
 Wm
 
 
 At 10:15 PM 3/25/2013, you wrote:
 
 Content-Type: multipart/alternative;
 boundary==_NextPart_000_00E3_01CE29A6.37CC5110
 Content-Language: en-us
 
 William,
  
 I would strongly disagree that conduit is tried and true on rooftops. I have 
 rarely seen good conduit runs on rooftops. Most electricians have no clue how 
 to work with expansion joints. Conduit on rooftops is a bad idea in general. 
 Most conduit runs in big buildings are all done indoors for good reason. We 
 are the crazy people doing things on the roof. 
  
 The sooner we get away from conduit­particularly for long feeder runs­the 
 better.
  
 In Europe they don’t have problems with their rooftop wiring systems because 
 everything is in tray.
  
 For those that don’t allow cable tray for anything less than 1/0, just 
 remember that if it isn’t called cable tray, then 392 doesn’t apply. The NEC 
 would allow us to use treated lumber in place of cable tray. This makes no 
 sense.
  
 We did some research on the origin of the 1/0 requirement, and it is ancient 
 and no longer relevant. Just because it is in the code, does not mean it is 
 correct. That’s why we try to fix it every three years.
  
 Bill.
  
  
 
 ___
 List sponsored by Home Power magazine
 
 List Address: RE-wrenches@lists.re-wrenches.org
 
 Change email address  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
 
 List-Archive: 
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
 
 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm
 
 Check out participant bios:
 www.members.re-wrenches.org
 
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Change email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] diesel vs. solar

[Andrew Truitt]

Erika - HOMER (http://www.homerenergy.com/) is a hybrid power system modeling 
tool for on- or off-grid applications. There is a 2 week free trial period and 
then it costs $100 for a 6 month software license.  I haven't used it yet but 
have heard good things. 

- Andrew Truitt


Sent from my iPad

On Mar 25, 2013, at 7:15 AM, Erika Weliczko er...@repowersolutions.com 
wrote:

 Does anyone know of an efficient calculator tool to help compare diesel /gas 
 generator to PV + batt + small generator for an off-grid vacation house?
  
 Regards,
 Erika
 ___
 List sponsored by Home Power magazine
 
 List Address: RE-wrenches@lists.re-wrenches.org
 
 Change email address  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
 
 List-Archive: 
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
 
 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm
 
 Check out participant bios:
 www.members.re-wrenches.org
 
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Change email address  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Simplified permit process

[Andrew Truitt]

One more: the SunRun report on the impact of local permitting on the cost
of solar:

http://www.sunrunhome.com/solar-lease/cost-of-solar/local-permitting/?utm_source=Solar+Citizen%3A+Issue+2+-+2%2F1%2F13utm_campaign=Solar+Citizenutm_medium=email


I know these aren't short articles, but they are generally well-supported
and defensible documents that should bolster your argument.  I've been
working on this a little bit lately with Solar 3.0 so feel free to call me
to discuss.



For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/
 %28202%29%20486-7507




Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough






On Thu, Feb 7, 2013 at 11:21 PM, Andrew Truitt atru...@gmail.com wrote:

 Allan - Check out the Resources section on the Solar 3.0 Permitting page:

 http://solar30.org/toolbox/permitting/


 You might also want to check out the DOE's Solar Powering Your Community
 document:

 http://www1.eere.energy.gov/solar/pdfs/47692.pdf


 And this page has a decent graphic breaking down BOS soft costs:

 http://www1.eere.energy.gov/solar/sunshot/nonhardware_costs.html


 And if you want more info / help one of these guys (like the Arizona team
 or the Optiny team) might be interested:

 http://www1.eere.energy.gov/solar/sunshot/rooftop_challenge.html



 For a brighter energy future,


 Andrew Truitt
 NABCEP Certified PV Installer™ (ID# 032407-66)

 Principal
 Truitt Renewable Energy Consulting, LLC

 (202) 486-7507

 LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

 Company Website http://truittreconsulting.weebly.com/
  %28202%29%20486-7507




 Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
 to fission. And it just so happens that there's an enormous fusion reactor
 safely banked a few million miles from us. It delivers more than we could
 ever use in just about 8 minutes. And it's wireless!

 ~William McDonough







 On Tue, Feb 5, 2013 at 6:17 PM, Allan Sindelar 
 al...@positiveenergysolar.com wrote:

  A bill has been introduced in our 60-day state legislative session to
 direct our statewide licensing agency to develop a consistent set of
 permitting standards for PV systems. Like many states, we suffer a
 confusing matrix of differing local standards, costs and requirements. I
 would like to testify at a legislative committee hearing in favor of a
 common standard.

 We have our own matrix spreadsheet, and we have the Solar ABCs' Expedited
 Process as developed by Bill Brooks and others. What I'm looking for are
 links to the best short, nontechnical and easily read articles about how
 the permit process has become a large portion of the cost of all PV
 systems, how it's holding back the adoption and growth of PV, how the Obama
 administration has recognized this as one of the structural barriers to
 more renewables adoption, and the like. The best I can find will get
 printed out and given to the legislators.

 I have seen many of these articles, on Renewable Energy World and other
 media, but have never saved them, of course. That's why I'm asking for this
 assistance. Many of us are facing the same issues in our jurisdictions.

 Thank you,
 Allan
 --
 *Allan Sindelar*
 *al...@positiveenergysolar.com* al...@positiveenergysolar.com
 NABCEP Certified Photovoltaic Installer
 NABCEP Certified Technical Sales Professional
 New Mexico EE98J Journeyman Electrician
 Founder and Chief Technology Officer
 *Positive Energy, Inc.*
 3209 Richards Lane (note new address)
 Santa Fe, New Mexico 87507
 *505 424-1112*
 *www.positiveenergysolar.com* http://www.positiveenergysolar.com/

 *
 *


 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org




___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Simplified permit process

[Andrew Truitt]

Allan - Check out the Resources section on the Solar 3.0 Permitting page:

http://solar30.org/toolbox/permitting/


You might also want to check out the DOE's Solar Powering Your Community
document:

http://www1.eere.energy.gov/solar/pdfs/47692.pdf


And this page has a decent graphic breaking down BOS soft costs:

http://www1.eere.energy.gov/solar/sunshot/nonhardware_costs.html


And if you want more info / help one of these guys (like the Arizona team
or the Optiny team) might be interested:

http://www1.eere.energy.gov/solar/sunshot/rooftop_challenge.html



For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/
 %28202%29%20486-7507




Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough







On Tue, Feb 5, 2013 at 6:17 PM, Allan Sindelar 
al...@positiveenergysolar.com wrote:

  A bill has been introduced in our 60-day state legislative session to
 direct our statewide licensing agency to develop a consistent set of
 permitting standards for PV systems. Like many states, we suffer a
 confusing matrix of differing local standards, costs and requirements. I
 would like to testify at a legislative committee hearing in favor of a
 common standard.

 We have our own matrix spreadsheet, and we have the Solar ABCs' Expedited
 Process as developed by Bill Brooks and others. What I'm looking for are
 links to the best short, nontechnical and easily read articles about how
 the permit process has become a large portion of the cost of all PV
 systems, how it's holding back the adoption and growth of PV, how the Obama
 administration has recognized this as one of the structural barriers to
 more renewables adoption, and the like. The best I can find will get
 printed out and given to the legislators.

 I have seen many of these articles, on Renewable Energy World and other
 media, but have never saved them, of course. That's why I'm asking for this
 assistance. Many of us are facing the same issues in our jurisdictions.

 Thank you,
 Allan
 --
 *Allan Sindelar*
 *al...@positiveenergysolar.com* al...@positiveenergysolar.com
 NABCEP Certified Photovoltaic Installer
 NABCEP Certified Technical Sales Professional
 New Mexico EE98J Journeyman Electrician
 Founder and Chief Technology Officer
 *Positive Energy, Inc.*
 3209 Richards Lane (note new address)
 Santa Fe, New Mexico 87507
 *505 424-1112*
 *www.positiveenergysolar.com* http://www.positiveenergysolar.com/

 *
 *


 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] AHJ's NABCEP cert.

[Andrew Truitt]

Ian - While some jurisdictions do choose to require NABCEP certification to
qualify for incentives, NABCEP certification does not replace local
licensing. Please see the disclaimer at the bottom of the NABCEP About Us
page (http://www.nabcep.org/about-us).


For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/
 %28202%29%20486-7507




Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough






On Sat, Feb 2, 2013 at 5:15 PM, Ian Eastman i...@cesolar.com wrote:

 Hi Re-wrenchers,
 Does anyone know where to find some good information on talking to your
 local AHJ concerning using the NABCEP cert. for a Solar Contracting
 License? Arguments, facts...?
 Thanks,
 Ian

 --
 *Ian Eastman *| Installation/Project Management
 *GO SOLAR!*
 *Cell: 307.413.6789*  •  *i...@cesolar.com i...@creativeenergies.biz*
 * **Creative Energies*
  *Victor, ID *office 208.354.3001
 Lander, WY office*  *307.332.3410*
 *Salt Lake City, UT office 801.487.6489
 * *www.CreativeEnergies.biz http://www.creativeenergies.biz/

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Best racking systems (was Awkward Mid-clamps jigs for installing or removing modules?)

[Andrew Truitt]

Jason - This is from Nate Colman, PE and Director of Technical Development
at Zep:

Zep Solar will be providing updated span tables and compliance letters
based on ASCE-10 in the next few weeks.  Regarding removal of modules for
service - it is common practice to remove up roof modules in order to gain
access to a module requiring service, regardless of the mounting system.
Zep’s recommended practices for module removal are detailed within our
installation manuals.  Please note that Zep Solar does not promote walking
across arrays in order to remove a module for servicing, as this may result
in damage to the cells.  Regarding microinverter installations - Zep Solar
continues to design innovative products for the installation of module
device electronics that will simplify the integration and mounting of these
devices in Zep arrays


For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/
%28202%29%20486-7507




Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough






On Mon, Jan 21, 2013 at 8:34 AM, Jason Szumlanski ja...@fafcosolar.comwrote:


 Despite the fact that Unirac has not updated its manual for ASCE 7-10, the
 span tables are still useful and there is adequate engineering information
 from them to get the job done. Solarmount is still our product of choice,
 despite several lower cost options like Ironridge. That could change if
 competitors move to lower cost options.

 *Jason Szumlanski*

 *Fafco Solar*

 *
 *


 On Mon, Jan 21, 2013 at 10:05 AM, Chris Mason 
 cometenergysyst...@gmail.com wrote:

 Jason,
 What are you using now? We look to Florida for standards, as he Caribbean
 doesn't have any.


 On Mon, Jan 21, 2013 at 9:10 AM, Jason Szumlanski 
 ja...@fafcosolar.comwrote:

 That's based on ASCE 7-05. If your AHJ requires ASCE 7-10, that is no
 longer the case. Florida Building Code 2010 requires use of ASCE 7-10, and
 ultimate design wind speeds have changed dramatically, so it's important to
 consider the method, not just the wind speed.

 We liked Zep, except when you have to remove a module for service.
 Microinverter installations are a little clunky with Zep, even with module
 frames specifically designed for Enphase. Unfortunately, we stopped using
 the product for a variety of reasons, not the least of which were new code
 requirements in Florida.

 *Jason Szumlanski** *

 *Fafco Solar*


 On Sat, Jan 19, 2013 at 5:52 PM, Andrew Truitt atru...@gmail.comwrote:


 Chris - The Zep system can be installed in up to 150mph wind zones in
 most cases.  See the span tables on the Zep engineering documentation:
 http://www.zepsolar.com/images/files/general/pdf/ZS_Compliance_Letter.pdf

 Todd - Ground snow loads of up to 70 psf are allowable.


 A free design tool can be found at zepulator.com


  For a brighter energy future,


 Andrew Truitt
 NABCEP Certified PV Installer™ (ID# 032407-66)

 Principal
 Truitt Renewable Energy Consulting, LLC

 (202) 486-7507

 LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

 Company Website http://truittreconsulting.weebly.com/
  %28202%29%20486-7507



 On Fri, Jan 18, 2013 at 10:07 PM, toddc...@finestplanet.com wrote:

 or heavy snow... the supports are clear out on the ends.



 todd







 On Friday, January 18, 2013 5:09pm, Chris Daum
 ch...@oasismontana.com said:

  So how does the Zep stuff's testing do in winds in excess of 100 mph?
  I saw a nice demo and display of their goods in at the Anaheim 2009
 SPI, but still am reticent to switch suppliers and modules to accomodate
 racking
  Chris Daum
 Oasis Montana Inc.




 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org





 --
 Chris Mason
 President, Comet Systems Ltd
 www.cometenergysystems.com
  Cell: 264.235.5670
 Skype: netconcepts

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out

Re: [RE-wrenches] Best racking systems (was Awkward Mid-clamps jigs for installing or removing modules?)

[Andrew Truitt]

Chris - The Zep system can be installed in up to 150mph wind zones in most
cases.  See the span tables on the Zep engineering documentation:
http://www.zepsolar.com/images/files/general/pdf/ZS_Compliance_Letter.pdf

Todd - Ground snow loads of up to 70 psf are allowable.


A free design tool can be found at zepulator.com



For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/
 %28202%29%20486-7507




Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough







On Fri, Jan 18, 2013 at 10:07 PM, toddc...@finestplanet.com wrote:

 or heavy snow... the supports are clear out on the ends.



 todd







 On Friday, January 18, 2013 5:09pm, Chris Daum ch...@oasismontana.com
 said:

  So how does the Zep stuff's testing do in winds in excess of 100 mph?
  I saw a nice demo and display of their goods in at the Anaheim 2009 SPI,
 but still am reticent to switch suppliers and modules to accomodate
 racking
  Chris Daum
 Oasis Montana Inc.

  --
 *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto:
 re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *August Goers
 *Sent:* Friday, January 18, 2013 5:36 PM
 *To:* RE-wrenches
 *Subject:* Re: [RE-wrenches] Best racking systems (was Awkward Mid-clamps
  jigs for installing or removing modules?)

 Andrew,

  Very interesting. I know several people at Zep and have toured their
 facility and definitely like many aspects of their product. But, we haven't
 tried it on one of our projects yet. I think part of that is because we
 work in the San Francisco Bay Area where custom racks are often required
 and are very prevalent. We have crews working on a daily basis on pitched
 and flat roofs of all types and Unirac and Pro Solar have been a staple to
 basically build whatever type of rack we need. Many installers, including
 us, use a pipe or angle aluminum sub structure on flat roofs to tilt and
 span over objects or fit panels into tight spaces. This allows for us to
 solve for any mounting dilemma but definitely takes a burden on time and
 materials. I'd say about 30% of our business is standard flush mount comp
 shingle. And the question is whether there is a strong enough solution that
 justifies stocking another type of panel and or racking system.

  Best,

  August

   August Goers

  Luminalt Energy Corporation

 1320 Potrero Avenue

 San Francisco, CA 94110

 m: 415.559.1525

 o: 415.641.4000

 aug...@luminalt.com

  *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto:
 re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Andrew Truitt
 *Sent:* Friday, January 18, 2013 3:26 PM
 *To:* RE-wrenches
 *Subject:* Re: [RE-wrenches] Best racking systems (was Awkward Mid-clamps
  jigs for installing or removing modules?)



 August - Zep Solar http://zepsolar.com recently signed a contract with
 Solar City to be their primary residential mounting solution nationally and
 brought me on to help roll out the program in Colorado.  I can tell you
 that Solar City spent 2 years working with Zep and vetting the product and
 they would not have signed on unless they felt that they would achieve
 significant cost savings.  Zep is actually very versatile - modules can be
 installed in portrait or landscape; array leveling is achieved easily with
 a few turns of a threaded stud; gaps in the array are easily installed;
 mounting options are available for almost any roof surface; the module /
 mounting system is (or will be very soon) listed to UL 2703 as a complete
 bonded system; and the lack of rail should eliminate the need for
 electrical rough-in roof inspections for the unfortunate souls with AHJs
 that require such nonsense.

 At least 14 module manufacturers now make Zep-compatible modules and
 installers are starting to line up to become dealers of the product.  I've
 installed a number of rail-less systems, but this one is the best I've seen.





 For a brighter energy future,


 Andrew Truitt
 NABCEP Certified PV Installer™ (ID# 032407-66)

 Principal
 Truitt Renewable Energy Consulting, LLC

 (202) 486-7507 %28202%29%20486-7507

 LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

 Company Website http://truittreconsulting.weebly.com/





 Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
 to fission. And it just so happens that there's an enormous fusion reactor
 safely banked a few million miles from us. It delivers more than we could
 ever use in just about 8 minutes. And it's wireless!

 ~William

Re: [RE-wrenches] Best racking systems (was Awkward Mid-clamps jigs for installing or removing modules?)

[Andrew Truitt]

August - Zep Solar http://zepsolar.com recently signed a contract with
Solar City to be their primary residential mounting solution nationally and
brought me on to help roll out the program in Colorado.  I can tell you
that Solar City spent 2 years working with Zep and vetting the product and
they would not have signed on unless they felt that they would achieve
significant cost savings.  Zep is actually very versatile - modules can be
installed in portrait or landscape; array leveling is achieved easily with
a few turns of a threaded stud; gaps in the array are easily installed;
mounting options are available for almost any roof surface; the module /
mounting system is (or will be very soon) listed to UL 2703 as a complete
bonded system; and the lack of rail should eliminate the need for
electrical rough-in roof inspections for the unfortunate souls with AHJs
that require such nonsense.

At least 14 module manufacturers now make Zep-compatible modules and
installers are starting to line up to become dealers of the product.  I've
installed a number of rail-less systems, but this one is the best I've seen.



For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile http://www.linkedin.com/pub/andrew-truitt/8/622/713

Company Website http://truittreconsulting.weebly.com/
 %28202%29%20486-7507



Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough








On Fri, Jan 18, 2013 at 3:23 PM, Ray Walters r...@solarray.com wrote:

  I second the vote for Pro Solar, but I don't care for their Fast Jacks.
 Their Tile Track mounts can actually be used on comp roofs ( see the
 manual) and work quite well.
 The best part of Pro Solar rails is they can be used for wire management
 too.  Just drop the cables into the open top of the rail, it acts as a
 decent cable tray.
 I've used Haticon and it has some advantages, but also its own problems:
 their clamps are not the greatest.

 Ray Walters
 Solarray, Inc.


 On 1/18/2013 3:04 PM, August Goers wrote:

  All -



 This thread brought up a question I've been mulling over for a while -
 what is the best flush mount rack out there these days on the market? I've
 tried a lot of different racks and am always on the hunt to find something
 better but the more experience I get I keep going back to Pro Solar and
 Unirac SolarMount. Pro Solar's price can't be beaten and once you get over
 having to drill a quick hole for every stanchion point it goes in really
 quickly. Plus, their mid clamps and end clamps are really solid, easy to
 work with, and work well with WEEBs.



 All that said, I still want something more. Fast and versatile is always
 better so I'll keep looking. The specialized racks like Zep seem cool but
 seem to lack the versatility aspect. Has anyone tried using Unirac's latest
 gen system SolarMount Evolution?



 Best,



 August



 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] 3 Phase With 2 Inverters?

[Andrew Truitt]

Bill Brooks posted this in 2008.  A couple of project-specific sentences
were removed to avoid confusion.

The 6kVA value comes from the California Rule 21 that I worked on. It only
applies to split-phase 240V systems (6kVA on 120V). There is no specific
limit for imbalance on a 3-phase service.

A basic rule for single phase generation on a 3=phase service is to rotate
among the phases in a balanced manner...

...The best way to place the imbalanced single-phase generators on the service
is to test the current on all three phases and put the inverter(s) on the
most heavily loaded phase(s). This reduces the site imbalance by reducing
the imbalance on the serving transformer (lowering current on the most
heavily loaded phases). It is common for 3-phase services to have imbalances
of 10 kVA or more, so single-phase inverters can reduce the problem rather
than make it worse.




For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting

(202) 486-7507

http://www.linkedin.com/pub/andrew-truitt/8/622/713



Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough






On Tue, Nov 27, 2012 at 3:33 PM, Chris Mason
cometenergysyst...@gmail.comwrote:

 I really don't understand what your problem with this arrangement is.
 How would this be different from a house on phase A-B installing an
 inverter and the next house on Phase B-C installing an inverter? Or,
 installing two single phase 240V A/C units in a three phase building?
 Electricians have no issue with installing single phase equipment in three
 phase buildings so why should small inverters be any more a problem.
 While it is always neat to install three inverters n a three phase
 configuration, 4,500 watts of imbalance is trivial.


 On Tue, Nov 27, 2012 at 3:59 PM, hol...@sbcglobal.net wrote:

 **
 We were asked to inspect a  GT system installed by others. Service is 208
 3ph with two (?) Fronius IG 4500 208v inverters. The inverter panel is 3ph
 with two 2pole breakers - one each side of the buss bar in a A/B, B/C
 configuration (??). Called Fronius and they said it would work, but they
 don't recommend it. No other information was given as to why they don't.
 My electrician is very uncomfortable with doing work on this system as is
 (ME TOO!), so I am wondering if I might be able get some ammo to convince
 system owner to add a third inverter to get the system right. What problems
 might/will be encountered in this system if not modified? BTW - inverter
 LCD screens were crapped out, so we couldn't readily see if system was
 functioning properlyfrom metering, we think not.


 Holt E. Kelly
 Holtek Fireplace  Solar Products
 500 Jewell Dr.
 Waco TX. 76712
 254-751-9111
 www.holteksolar.com

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org





 --
 Chris Mason
 President, Comet Systems Ltd
 www.cometenergysystems.com
  Cell: 264.235.5670
 Skype: netconcepts


 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Best practices for conduit penetration on roof

[Andrew Truitt]

Not to be too nit-picky, but I think its a good idea to distinguish between
branch circuits (parallel connections) and strings (series connections).
Enphase inverters are wired in parallel while string or central inverters
require modules to be wired in series (with parallel strings as an
option).  I know you know this Jason, just wanted to clarify.


For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting

(202) 486-7507

http://www.linkedin.com/pub/andrew-truitt/8/622/713



Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough







On Mon, Nov 26, 2012 at 11:50 AM, Jason Szumlanski ja...@fafcosolar.comwrote:

 I just called Soladeck and they are sending me some more info on
 availability. I'll pass it along when I get it. I didn't realize they made
 an AC roof mounted string combiner solution. That's a huge help for 2 or 3
 string Enphase installations (they make both combiners).

 While on the subject, we recently started using the Enphase cable couple
 with Type TC-ER cable to extend cabling to junction boxes when necessary...
 No more wasting trunk cable connectors! I suppose Type TC-ER could be used
 all the way to the main distribution panel, thereby eliminating junctions
 on the roof, but I haven't looked into the cost/benefit of that idea.

 *Jason Szumlanski*

 *Fafco Solar*



 On Mon, Nov 26, 2012 at 1:26 PM, Gary Willett 
 g...@icarussolarservices.com wrote:

  NICK:

 I could not find the AC model numbers you provided on the SolaDeck web site.
 Do you know the manufacturer, and the voltage and temperature ratings,
 for the 2-pole 20A AC breakers?

   Regards,


 Gary Willett, PE
 Icarus Engineering LLC

 Icarus Solar Services LLC
 

   On 11/26/2012 11:54 AM, Nick Soleil wrote:

 Hi wrenches;

 SolaDeck Models 0760-41AD and 0766-41AD are rated for up to 60A at 240Vac.

 It can be ordered with DIN rail mounted AC breakers and a combiner kit.
 The 2 - 20A circuit combiner kit is part 0760K2AC.

 I'd recommend checking with a distributor or on SolaDeck's website for
 the most current information.

 Nick Soleil,
 Enphase Energy


 On Sun, Nov 25, 2012 at 7:44 AM, Kent Osterberg k...@coveoregon.comwrote:

 My understanding has been that the Soladeck has only been listed for DC
 wiring. Perhaps they have a manufacturer rep on RE-wrenches that can
 clarify.

 Kent Osterberg
 Blue Mountain Solar, Inc.
 www.bluemountainsolar.com



 On 11/25/2012 6:20 AM, Dave Palumbo wrote:

 Rich,

 We have been using SolaDeck PV roof mount enclosure. NEMA 3R with a
 flashed
 penetration. Can use for combining, or simply as a pass through box.

 Dave

 David Palumbo
 Independent Power LLC
 462 Solar Way Drive
 Hyde Park, VT 05655
 www.independentpowerllc.com
 NABCEP Certified PV Installer
 Vermont Solar Partner
 25 Years Experience, (802) 888-7194




 -Original Message-
 From: re-wrenches-boun...@lists.re-wrenches.org
 [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Rich
 Nicol
 Sent: Sunday, November 25, 2012 8:11 AM
 To: 'RE-wrenches'
 Subject: [RE-wrenches] Best practices for conduit penetration on roof

 Wrenches,
 We typically run conduit for roof mounts over the edge of the roof to
 the
 eaves, rather than penetrate the roof whenever possible. An upcoming
 installation on an freshly asphalt shingled roof requires that we
 penetrate
 the roof for the conduit run (Enphase). I'm wondering if there are any
 suggestions for preferred flashing products and best known practices.
 It's
 always seemed to me that the typical Oatey type flashing dries and
 cracks
 eventually.
 Thanks for your insights..
 Rich


 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org




 --

 Cordially,

 *Nick Soleil*

 *Field Applications Engineer
 *

 *Enphase Energy*

 Mobile: (707) 321-2937


 **

 *Enphase Commercial Solar.* 
 *Limitless.*http://www.enphase.com/commercial?utm_source=emailutm_medium=sigutm_campaign=Comm2012

 *
 *http://www.enphase.com/commercial?utm_source=emailutm_medium=sigutm_campaign=Comm2012

 1420 North McDowell

 Petaluma, CA 94954

 www.enphase.com http://www.enphaseenergy.com/

 P: (707) 763-4784 x7267

 F: (707) 763-0784

 E: nsol...@enphaseenergy.com

  [image: nabcep logo] Certified Solar PV Installer #03262011-300

 “Don’t get me wrong: I love nuclear energy

Re: [RE-wrenches] SunSlates from Atlantis Energy

[Andrew Truitt]

I've seen a few Atlantis projects mid-install.  As with many
roof-integrated PV products they involve a LOT of electrical connections
and significant installation labor.  If memory serves, a wooden lattice
structure was built on top of the roof to provide ventilation and the
slates were fastened to the lattice.   The issues I would be concerned with
are connection failures and the labor costs associated with installation
and slate replacement.  The estimate that I got from installers (circa
2009) was $10-12 / watt installed (all-in).  I am curious about their
long-term weather-proofing performance, especially in adverse climates.


For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting

(202) 486-7507

http://www.linkedin.com/pub/andrew-truitt/8/622/713



Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough





On Tue, Oct 2, 2012 at 5:16 AM, Glenn Burt glenn.b...@glbcc.com wrote:

 I first saw them at a show back in ’06, so know they have been around a
 while.

 No firsthand experience installing them, however.

 ** **

 Glenn

 ** **

 *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto:
 re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Aladdin Solar
 *Sent:* Monday, October 01, 2012 2:51 PM
 *To:* re-wrenches@lists.re-wrenches.org
 *Subject:* [RE-wrenches] SunSlates from Atlantis Energy

 ** **

 Anyone familiar with SunSlates from Atlantis Energy (
 http://atlantisenergy.com/?page_id=255 )? We have a customer interested
 in this system. We usually try to steer our customers to components from
 well known manufacturers. I've not run across this one before. Looks like a
 pretty involved roofing project. Can you comment on your experience
 installing these and express any opinions on quality?

  

 Thanks.

  

 Charlie Pickard
 NABCEP Certified Solar PV Installer ®
 Aladdin Solar
 952-401-7073
 cpick...@aladdinsolar.com
 www.AladdinSolar.com



 __ Information from ESET NOD32 Antivirus, version of virus
 signature database 7536 (20121001) __

 The message was checked by ESET NOD32 Antivirus.

 http://www.eset.com

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Up for a 1-Line Riddle?

[Andrew Truitt]

Ahh yes, the old combine strings before landing on a fused DC input
terminal trick.  Sure to blow the fuse the first sunny day.  This is why
SMA created their fuse-bypass DC input terminal.  I take it the installer
was not aware of this...



For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting

(202) 486-7507

http://www.linkedin.com/pub/andrew-truitt/8/622/713



Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough





On Thu, Aug 30, 2012 at 11:53 AM, Jason Szumlanski ja...@fafcosolar.comwrote:

 I was sent to look at another contractor's work, and found three SB5000
 inverters with blown string input fuses. I was able to determine the reason
 pretty quickly, and was later sent the original 1-Line, which was installed
 per the drawings. The 1-Line came from a leading system integrator who
 shall remain nameless.

 See anything wrong?

 https://www.sugarsync.com/pf/D6539806_8669786_010829

 Just goes to show you - the contractor needs to take responsibility and
 verify the specifications are correct, safe, and code compliant.

 Jason Szumlanski
 Fafco Solar

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

[RE-wrenches] Xcel residential production meter socket requirements

[Andrew Truitt]

Colorado Wrenches - I am putting together my Xcel application for my
personal residential PV system and I am having a hard time finding the
exact specifications for the meter socket I am required to supply.  I have
found that it must be in compliance with the 3/1/11 revision of the Xcel
Energy Standard, but my research assistant (aka google) has been unable to
produce that document for me.  Any thoughts?


For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting

(202) 486-7507

http://www.linkedin.com/pub/andrew-truitt/8/622/713



Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] L feet no flashing in shingle roof

[Andrew Truitt]

For many years I installed L-feet with galvanized step flashings adhered under 
the shingle row above the penetration.  This provides a mechanical barrier and 
can be very durable if the flashing is well secured. 

- Andrew


Sent from my iPhone

On Jun 28, 2012, at 5:39 PM, Drake drake.chamber...@redwoodalliance.org wrote:

 I'm quoting a job that has an existing array with L feet bolted down to a 
 shingle roof with no flashings.  I want to match the height of the existing 
 array.  Also some modules are being worked in around skylights where it is 
 unlikely that room would be available for flashings to center over rafters.
 
 I've always used flashings.  Would it be completely crazy to follow suit of 
 the existing array and bolt L feet straight to the shingle roof with good 
 roof sealant?  If so, how would you seal it?
 
 Thanks,
 
 Drake 
 Drake Chamberlin 
 ATHENS ELECTRIC LLC
 OH License 44810
 CO license 3773
 NABCEP Certified PV
 
 ___
 List sponsored by Home Power magazine
 
 List Address: RE-wrenches@lists.re-wrenches.org
 
 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
 
 List-Archive: 
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
 
 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm
 
 Check out participant bios:
 www.members.re-wrenches.org
 
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] NABCEP

[Andrew Truitt]

Wrenches - I'd like to address some of the aforementioned concerns about
NABCEP.  I do not claim to present the official NABCEP company line, but
I have been a certificant since 2007, have been involved with a
few programmatic committees, and currently sit on the board of directors.

   - I certainly sympathize with Dana's frustration with having to drive a
   full day to get to a testing center.  There are many others in a similar
   situation and it is one of the complaints about NABCEP that I hear most
   often (along with exam frequency).  Unfortunately NABCEP is still a very
   small certification body relative to trade licensing and, as a voluntary
   certification, we just don't have the resources that states do.
   - Allan is correct about the processes the Exam Committees have to
   undergo in order to follow defensible psychometric principles and maintain
   NABCEP's ANSI accreditation.
   - What additional resources would people like to use at the exam?  I
   would be happy to take suggestions to the Board.
   - I think most certificants would agree that there would be a value in
   multiple, specialized NABCEP PV certifications.  If fact there has been
   numerous internal discussions about exactly that and I think the next
   certification that NABCEP develops will fall into this category.  However,
   certification development takes time and money, and some of the programs
   that NABCEP has developed have not received the interest that was
   anticipated, so we need to perform our due diligence before committing the
   sizable resources that it takes to create a new certification.  As the PV
   Installer certification stands now, it is intended to test a broad variety
   of knowledge, largely because historically companies were smaller and
   employees were more likely to be generalists.  The industry has obviously
   grown very rapidly with one result being increased specialization and
   NABCEP does intend to keep up with this trend.  With all that in mind
   NABCEP welcomes targeted donations for developing new credentials.
   - Certification certainly is a business, though I think that its worth
   noting that NABCEP was created by installers who were concerned with the
   workmanship of RE system installations and didn't want to see a repeat of
   what happened to the solar water heating industry in the '70s.  Since its
   inception NABCEP has been a volunteer-driven non-profit entity, guided by
   some of the most knowledgeable and dedicated people in the industry (many
   of whom are on this list-serve).
   - We are well aware of the fact that NABCEP certs often get promoted
   off the roof and find themselves in design, sales or managerial rolls.
Obviously this reflects well on NABCEP certificants, but it is a problem
   for a program that requires ongoing field work for re-certification.  This
   is yet another challenge that we hope to address with future, more
   specialized certifications.  Note that it takes somewhere between 12 and 18
   months to properly develop a credentialing program, and NABCEP has been
   quite busy over the years responding to market demands for Entry Level,
   Technical Sales, Small Wind, and now Company Accreditation.  We know that
   the industry is changing and we need to change with it, so keep the
   suggestions coming!


I think everyone I've ever met has had some idea about how NABCEP could be
better, and often times they are right.  Unfortunately NABCEP operates
under the real-world constraints of budgets, fund raising, volunteer
availability, consensus building, accreditation requirements, etc...   In
the end I think it is hard to argue that NABCEP has not benefited our
industry.  NYSERDA did a study and found that systems that were installed
by NABCEP Certified PV Installers had less issues at inspection than those
built by non-NABCEP installers.  As someone who cares deeply about
installation quality and safety, this tells me that NABCEP does provide
value and fills a needed roll in our industry.


For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting

(202) 486-7507

http://www.linkedin.com/pub/andrew-truitt/8/622/713


Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough







On Wed, May 30, 2012 at 5:56 PM, Chris Mason
cometenergysyst...@gmail.comwrote:

 One of the issues I have with the NABCEP certification is the title. When
 I look at the subject matter, comparing the scope to other similar
 certifications, I feel installer is not really accurate. I have a couple
 of workers that install PV systems with me, and they are able to get the
 job done. They are what I would call installers. They don't

Re: [RE-wrenches] 120% Rule - applying to multiple load centers etc

[Andrew Truitt]

August / Eric - My understanding of this requirement is that all equipment
in the circuit must be rated to handle the maximum fault current that could
flow at a given point.  So, if your power source / overcurrent protection
scheme is: 50A (inverter 1) + 50A (inverter 2) + 100A (utility grid via
fused disconnect) then 200A is the max fault current at any point in that
circuit (including conductors and switches) and should be used in your 120%
rule calculation (as J.W. does).  This can definitely present issues,
especially when attempting to interconnect at existing subpanels with
feeders that were not sized with the future addition of PV in mind, but I
think one intent of this article is to ensure that if there were a fault in
those feeders, and the PV inverters continued to operate (unlikely), that
the conductor could handle the sum of the fault currents (PV + utility).


For a brighter energy future,


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)

Principal
Truitt Renewable Energy Consulting

(202) 486-7507

http://www.linkedin.com/pub/andrew-truitt/8/622/713


Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough



On Mon, May 7, 2012 at 10:55 AM, August Goers aug...@luminalt.com wrote:

 Hi Wrenches,



 Please see question below forwarded from one of my fellow engineers.
 Thanks, August



 *From:* Eric Schoonbaert [mailto:e...@luminalt.com]
 *Sent:* Monday, May 07, 2012 9:38 AM
 *To:* August Goers
 *Subject:* 120% Rule



 The 120% rule, and how it is applied to panel board bus size has been
 widely discussed. There is one part of the rule (2008 and 2011 NEC quoted
 below) that gets much less attention and is the subject of this email. That
 is, how and when is the rule applied to a conductor? The heading and text
 both clearly say bus or *conductor *rating [emphasis added].

 * *

 *2011 NEC 705.12 Point of Connection* *(D)* *(2)* *Bus or Conductor
 Rating.* The sum of the ampere ratings of overcurrent devices in circuits
 supplying power to a busbar or conductor shall not exceed 120 percent of
 the rating of the busbar or conductor.



 *2008 690.64 Point of Connection (B) (2)* *Bus or Conductor Rating.* The
 sum of the ampere ratings of overcurrent devices in circuits supplying
 power to a busbar or conductor shall not exceed 120 percent of the rating
 of the busbar or conductor. In systems with panelboards connected in
 series, the rating of the first overcurrent device directly connected to
 the output of a utility-interactive inverter(s) shall be used in the
 calculations for all busbars and conductors



 In Homepower 140 (December 2010  January 2011), John Wiles has several
 examples of the application of the 120% rule in his code corner article. I
 have included one below.



 For example: Two inverters each require a 50 A backfed breaker in a main
 lug inverter combining load center to meet 690.8 requirements. A
 supply-side connection is going to be made with a 100 A fused disconnect.
 The rating of the combining load center and the ampacity of the
 conductor to the 100 A fused disconnect must follow the
 690.64(B)(2) requirements. As noted, even with a supply-side connection, as
 soon as the circuit passes through the service
 entrance disconnect/overcurrent device, all load-side requirements apply,
 because the PC circuit is now on the load side of the service disconnect.

 (50 A + 50 A +100 A) ÷ 1.2 = 200 A ÷ 1.2 = 166.7 A



 The numbers indicate that a 200 A inverter load center/panel would be
 needed because there is no 175 A option available. Assuming a 75°C rated
 conductor, a 2/0 AWG conductor should be used between that panel and the
 100 A fused disconnect



 My particular question concerns the application of this rule to the
 ampacity of the conductor. This is the only example I have come across
 where the rule is applied to a conductor in this way. Is it the intention
 of the code language to size the conductor between a main lug sub panel
 used to combine solar circuits and the OCPD for the panel using the 120%
 rule? Or is the inclusion of the word *conductor* to ensure that load
 centers that have conductors integral to them are covered?



 What about other equipment between along the conductor such as a utility
 of fire department disconnect? In the John Wiles example above, if an
 utility disconnect was to be located along the conductor, would 200 A rated
 disconnect be necessary?



 Applying this rule to the conductor does not seem to follow the same logic
 (at least as I understand it) as a panel board bus bar which has spots for
 additional circuits between the OCPD's supplying power to it while a
 conductor is typically does not.





 ___
 List sponsored

Re: [RE-wrenches] Starting fires for fun with string wiring

[Andrew Truitt]

MidNite also offers AFCI protection in their disconnecting combiner boxes.
 The switches can also be hard-wired to the MidNite Birdhouse which allows
ground-level personnel to remotely disconnect the PV output circuit at the
combiner.


http://www.midnitesolar.com/pdfs/multi1_inside_outside.pdf



For a brighter energy future,


Andrew Truitt  MSc., LEED GA
NABCEP Certified PV Installer™ (ID# 032407-66)
 Principal
Truitt Renewable Energy Consulting
(202) 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713



Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough


On Mon, Mar 12, 2012 at 9:13 AM, Dan Fink danbo...@gmail.com wrote:

 The Midnite Classic controllers come with arc-fault protection built in.

 --
 Dan Fink,
 Executive Director;
 Otherpower
 Buckville Energy Consulting
 Buckville Publications LLC
 NABCEP / IREC accredited Continuing Education Providers
 970.672.4342 (voicemail)


 On Mon, Mar 12, 2012 at 10:09 AM, JRQ quackkc...@yahoo.com wrote:
  I've been wondering about this since I read over the 2011 code:
 
  Are there any listed DC arc-flash products on the market yet, or
 scheduled
  to come to market within the next year?
 
  Also: will arc-flash protection come in the form of breakers that need
 to be
  installed externally, or will it be something internal to the inverters
 or
  charge controllers to which source circuits are wired? Will they need to
 be
  installed on each string, or can they function on a combined circuit?
 
  Do systems with DC optimizers or with micro-inverters have arc-fault
  protection at the module level?
 
  Jeffrey Quackenbush
  NABCEP Certified PV Installer
  Peripatetic Solar Technician
 
 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org


___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] 30 to 35 kW inverters

[Andrew Truitt]

If you're talking direct-grid the Sunny Tower would be my choice:

http://www.sma-america.com/en_US/products/grid-tied-inverters/sunny-tower-us.html




For a brighter energy future,


Andrew Truitt  MSc., LEED GA
NABCEP Certified PV Installer™ (ID# 032407-66)
 Principal
Truitt Renewable Energy Consulting
(202) 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713


Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough





On Wed, Feb 22, 2012 at 11:20 AM, Exeltech exelt...@yahoo.com wrote:

 Marco,

 Single phase as in 120V or 240V?  We make models in
 both voltage ranges (up to 120kW @ 208V, three-phase).

 We can continue off-line unless this is of interest
 to the entire group.


 Dan


 --- On Wed, 2/22/12, penobscotso...@midmaine.com 
 penobscotso...@midmaine.com wrote:

  From: penobscotso...@midmaine.com penobscotso...@midmaine.com
  Subject: Re: [RE-wrenches] 30 to 35 kW inverters
  To: RE-wrenches re-wrenches@lists.re-wrenches.org
  Date: Wednesday, February 22, 2012, 11:41 AM
  I'm not sure how many Radians you can stack, but they
  are a great inverter. Exeltech also makes a buildable
  line of inverters and you might ask Dan there about them.
  I also think Apollo is coming out soon with the ability
  to stack multiple inverters to get there. The redundancy
  of stackable is nice for off grid use.
 
  Daryl
 
 
 
   Anyone know of any single-phase inverters out there in
   the 30-35 kW range?
  
  
  
   Thanks,
  
   marco
  

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org


___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] SolarEdge v Enphase

[Andrew Truitt]

Does anyone have any experience installing SolarEdge?  The advantage that I
see over microinverters from a reliability standpoint is that the
power optimizers do not contain electrolytic capacitors.  The inverter is
also supposed to last longer since it does not handle the MPPT duties so
the electronics are less complex.

Marv - Do you have any SolarEdge reliability and / or performance data you
can share beyond the white paper on the SolarEdge website?  Also, one issue
that I've had with Enphase is an occasional loss of data transfer between
inverters and the monitoring system - does SolarEdge have that issue?  If
not, how have you overcome it?  Can you share a link to a live SolarEdge
system monitoring interface?



Andrew Truitt
Truitt Renewable Energy Consulting



On Thu, Jun 9, 2011 at 12:40 PM, Mark Frye ma...@berkeleysolar.com wrote:

 **
 Indeed.

 Yes it is 1v per module when not operating, but still 250V when
 operating. That means that all code requirements for 250V still apply to
 the DC wiring such as bonding bushings for conduit as required etc.

 SolarEdge is making hay off of this safety feature, but this feature is
 inherent in microinverters as well.


 Mark Frye
 Berkeley Solar Electric Systems
 303 Redbud Way
 Nevada City,  CA 95959
 (530) 401-8024
 *www.berkeleysolar.com* http://www.berkeleysolar.com/


  --
 *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto:
 re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *benn kilburn
 *Sent:* Thursday, June 09, 2011 10:54 AM
 *To:* Wrenches
 *Subject:* Re: [RE-wrenches] SolarEdge v Enphase

 Mark,
 I thought that the SolarEdge reduced the 'string' voltage to 1V per
 unit/module, reducing the high DC voltage risk factor, until the inverter
 switch was turned on?

 The fact that by hitting the off switch on the inverter will reduce the
 potentially high DC voltage to 1V per unit/module could be an advantage
 from a safety perspective (maintenance, firemen/utility workers)

 Labor/time-wise, it is like installing both a microinverter system and a
 string inverter system together, soo

 benn

 DayStar Renewable Energy Inc.
 b...@daystarsolar.ca
 780-906-7807
 HAVE A SUNNY DAY

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Speaking of outdoor DC lighting...

[Andrew Truitt]

Thanks Isaac.  I spoke with Frank and he was helpful.  Those LED flood
lights are not cheap!  I am now thinking about using a SunSaver MPPT and a
small pocket inverter to give myself more flexibility with the lighting
options.

Does anyone have any experience with the SunSaver MPPT Remote Meter?  What
functionality does it provide?


Andrew Truitt
Truitt RE Consulting



On Tue, Dec 20, 2011 at 11:34 AM, Isaac Opalinsky iopalin...@gmail.comwrote:

 Andrew,

 I used to work with Frank Patterson from The Lightup Company:
 http://thelightupco.com/.  He has a bunch of standard fixtures, but can
 also custom build a lighting package.  He's very familiar with the issues
 around DC LED lighting, like thermal management and stability.

 You will need fuses, both for the battery and the light.

 Isaac Opalinsky


 On Tue, Dec 20, 2011 at 1:26 PM, 
 re-wrenches-requ...@lists.re-wrenches.org wrote:

 Send RE-wrenches mailing list submissions to
re-wrenches@lists.re-wrenches.org

 To subscribe or unsubscribe via the World Wide Web, visit

 http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org
 or, via email, send a message with subject or body 'help' to
re-wrenches-requ...@lists.re-wrenches.org

 You can reach the person managing the list at
re-wrenches-ow...@lists.re-wrenches.org

 When replying, please edit your Subject line so it is more specific
 than Re: Contents of RE-wrenches digest...


 When responding to posts within the Digest, be sure to restore the
 Subject: line to the original, and please edit out any extraneous lines
 from the quoted message.


 Today's Topics:

   1. Speaking of outdoor DC lighting... (Andrew Truitt)


 --

 Message: 1
 Date: Mon, 19 Dec 2011 11:47:39 -0700
 From: Andrew Truitt atru...@gmail.com
 To: RE-wrenches re-wrenches@lists.re-wrenches.org
 Subject: [RE-wrenches] Speaking of outdoor DC lighting...
 Message-ID:

 caktvxmsotvqbhz45uigudves0nmrb6fshth2l39lncm59r0...@mail.gmail.com
 Content-Type: text/plain; charset=iso-8859-1

 ... I am putting together my first small DC lighting system for my
 backyard
 shed.  It will consist of:

 [1] 180W Schuco module
 [1] Morningstar SunLight charge controller
 [1] Deka AGM 12V, 32Ah battery
 [1] Trimetric meter

 And I need to find the right 12V LED flood light(s).  Any suggestions?
  The
 purpose will be for winter evening b.b.q's and late-night lawn bowling
 matches in summer.

 Any other advice for how to execute this installation?  Does the SunLight
 come with fusing or do I need to protect it externally?


 Happy holidays to all!


 Andrew Truitt
 Truitt RE Consulting
 -- next part --
 An HTML attachment was scrubbed...
 URL: 
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20111219/388aa2bc/attachment.html
 

 --

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org



 End of RE-wrenches Digest, Vol 4, Issue 409
 ***



 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

[RE-wrenches] Speaking of outdoor DC lighting...

[Andrew Truitt]

... I am putting together my first small DC lighting system for my backyard
shed.  It will consist of:

[1] 180W Schuco module
[1] Morningstar SunLight charge controller
[1] Deka AGM 12V, 32Ah battery
[1] Trimetric meter

And I need to find the right 12V LED flood light(s).  Any suggestions?  The
purpose will be for winter evening b.b.q's and late-night lawn bowling
matches in summer.

Any other advice for how to execute this installation?  Does the SunLight
come with fusing or do I need to protect it externally?


Happy holidays to all!


Andrew Truitt
Truitt RE Consulting
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Home Depot solar?

[Andrew Truitt]

HD hires local contractors to install their systems.  I've worked for a
couple of quality-oriented  companies that have explored this relationship
but both determined that the margins were just too thin.

Andrew Truitt MSc, LEED GA
Truitt Renewable Energy Consulting
202 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713

Please excuse brevity and typos - this message was typed on tiny keys.
On Sep 29, 2011 9:17 AM, Jason Szumlanski ja...@fafcosolar.com wrote:
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Ladders for Inspectors

[Andrew Truitt]

 Jason - In my experience AHJs run the gamut on this issue, from refusing to
 get on the roof to requiring OSHA compliant access to all areas of the
 system supplied by the installer.  In the latter case I would ALWAYS have
 someone on site, even if they had to wait all day (not uncommon).  They
 didn't have to be a crew leader, but I did try to send someone who could
 speak intelligently about the system.  In my commissioning work I also
 require that the contractor supplies OSHA compliant means to access all
 system components and I've never gotten any push-back on that, though the
 definition of OSHA compliant is sometimes debated and I've probably gotten
 on some ladders that I shouldn't have.  If you needed a man-lift to access
 the system you wouldn't expect the inspector to provide that, so why is a
 ladder any different?

 That being said, if they are requiring it and costing you money to supply
 it, and then not using it, that would pickle my giblets a little bit too.


 For a brighter energy future,


 Andrew Truitt  MSc., LEED GA
 NABCEP Certified PV Installer™ (ID# 032407-66)
  Principal
 Truitt Renewable Energy Consulting
 (202) 486-7507
  http://www.linkedin.com/pub/andrew-truitt/8/622/713
 http://www.linkedin.com/pub/andrew-truitt/8/622/713




 Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
 to fission. And it just so happens that there's an enormous fusion reactor
 safely banked a few million miles from us. It delivers more than we could
 ever use in just about 8 minutes. And it's wireless!

 ~William McDonough






 On Thu, Sep 1, 2011 at 12:09 PM, Jason Szumlanski ja...@fafcosolar.comwrote:

 Ha – The roof we are dealing with today has 26’ high eaves and it is a
 steep metal roof. There is no way they are actually getting up there. When
 we do timed inspections in other jurisdictions they rarely step foot on a
 ladder. Maybe it’s a testament to our reputation, but we are paying for the
 inspection - it would be nice if it were actually done.

 ** **

 Jason Szumlanski

 Fafco Solar 

 ** **

 ** **

 *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto:
 re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Benn At
 DayStarSolar
 *Sent:* Thursday, September 01, 2011 1:55 PM
 *To:* RE-wrenches
 *Subject:* Re: [RE-wrenches] Ladders for Inspectors

 ** **

 This issue came up for me as well.

  I dont recall at the moment where it is written, perhaps it was OSHA,
  but apparently the contractor (permit puller) is responsible for supplying
 access and safety equip ie, fall protection (with exception of personal PPE,
 boots, hat, glasses) for inspectors to inspect the permitted work. 

 ** **

 You do bring up a valid issue re leaving a ladder up for them, especially
 considering they typically leave a pretty big window open for when they will
 drop by. I believe that this puts the onus on the inspector to provide an
 accurate inspection time. 

 ** **

 I'm impressed that your inspector even wants to get up on a ladder!!!

 ** **

 benn

 Sent from a 'smart' phone, with tiny keys. Please excuse shortcuts and
 typos. 


 On 2011-09-01, at 8:46 AM, Jason Szumlanski ja...@fafcosolar.com
 wrote:

 Is anyone being forced to leave ladders up and secured in place for
 inspectors? One jurisdiction in our neck of the woods is insisting that we
 do this. I believe this is a serious risk to public safety, and I won’t be
 responsible for some homeowner or curious child getting injured on or around
 a ladder propped against a building. The jurisdiction does not do timed
 inspections, so we can’t even be there to raise the ladder for them.

  

 Can anyone point to some resources (OSHA?) that I can use to convince the
 building official that this is a very bad idea?

  

 Jason Szumlanski

 Fafco Solar

  

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org


 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org




___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive

[RE-wrenches] Conductor supporting requirements

[Andrew Truitt]

Does anyone know the maximum support spacing for conductors in free air and
what code section addresses it?  I'm thinking of USE-2 or PV Wire being run
in loop hangars along purlins under an array.

Thanks in advance!


For a brighter energy future,

Andrew Truitt
Principal
Truitt Renewable Energy Consulting
NABCEP Certified PV Installer™ (ID# 032407-66)
(202) 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713

[image: 24 copy.jpg]

Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
24 copy.jpg___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] galvanized barn roofing

[Andrew Truitt]

Here's the VersaBracket option from S-5!:

http://www.s-5.com/clamps/index_71.cfm


For a brighter energy future,

Andrew Truitt
Principal
Truitt Renewable Energy Consulting
NABCEP Certified PV Installer™ (ID# 032407-66)
(202) 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713

[image: 24 copy.jpg]

Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough





On Thu, Apr 7, 2011 at 5:53 PM, jay peltz j...@asis.com wrote:

 Hi Daryl,

 I have drilled a small pilot hole, put plenty of sealant around it, then
 lag through it with what ever foot you are using.

 I don't think the cost of flashing around each foot with a rubber boot and
 15 screws is any better but its sure more costly in time and money.

 jay peltz power


 On Apr 7, 2011, at 2:28 PM, penobscotso...@midmaine.com wrote:

  Does anyone have experience mounting arrays on barns with 24 wide
  galvanized roofing (not standing seam)? It is flat, not corrugated, but
  has an overlapping edge on either side. It's pretty much a standard on
  barn roofs around here, but I hesitate to penetrate any metal roof. How
  have others dealt with this type of material?
 
  Thanks for any information,
  Daryl
 
  Daryl DeJoy
  NABCEP Certified PV installer
  Penobscot Solar Design
 
  mbers.re-wrenches.org
  

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org


24 copy.jpg___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] sizing a sub-panel used to combinemultipleinverter outputs

[Andrew Truitt]

 I concur with Jason and Brian's interpretation of 690.64(B)(2).  I think
one of the intents of the code is to ensure that if there is a fault in a
busbar or conductor and the maximum amperage is being delivered to that
fault from all OCPDs supplying it (solar + utility), the busbar or conductor
should be able to handle the sum of those fault currents.  I have
encountered numerous jurisdictions that interpret it this way, and it is
hard to argue with them from a strictly code perspective.

However, Jason Fisher once pointed out to me that if the fault occurs in a
feeder between the main service panel and a subpanel (solar accumulation
panel or otherwise) it is impossible for any part of that conductor to carry
more current than allowed by the largest OCPD feeding the conductor.  Its
the same principle behind the 690.64(B)(7) requirement to locate the solar
interconnection breaker at the opposite end of the busbar from the incoming
feeders.  This argument obviously doesn't apply to accumulation panel
busbars where you have more than 2 OCPDs supplying current, but I think it
is a valid argument for basing your feeder conductor sizing on the largest
OCPD protecting that conductor.



For a brighter energy future,

Andrew Truitt
Principal
Truitt Renewable Energy Consulting
NABCEP Certified PV Installer™ (ID# 032407-66)
(202) 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713

[image: 24 copy.jpg]

Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough







On Wed, Mar 30, 2011 at 10:12 AM, Kent Osterberg k...@coveoregon.comwrote:

 Jason,

 Now you are opening up a can of worms.

 It's bad enough that 705.12(D) doesn't say anything about a panel that
 can't (or shouldn't, or won't) have anything connected but interactive
 inverters. But when that is the case, a bus rating of 100% of the source
 circuits should apply. For PV systems a 125% factor will already apply to
 each inverter circuit.

 While it seems logical that the conductors are an extension of the bus bar
 and should be treated the same way, 705.12(D) isn't about the conductors -
 it's about the bus bars. The conductors are protected by the breakers --
 80-amp breakers and wire with 80-amp ampacity.

 Getting into the example further, I see flaws in it. If the inverters are
 7500-watt 240-volt, the output current would be 7500/240 = 31.25 amps and
 40-amp breakers would be adequate. Then there would have been no issues,
 even going directly into the main panel. If the inverters are 7500-watt
 208-volt, the output current is 7500/208 = 36 amps and the 50-amp breakers
 make sense. That means the bus bars and feeder conductor have a continuous
 current of 72 amps.  That means neither the 80-amp breaker nor 80-amp wire
 is sufficient because 72 x 1.25 = 90 amps. Now the example doesn't resolve
 the limitation of backfeeding at the main. Opps!


 Kent Osterberg
 Blue Mountain Solar






 Jason Szumlanski wrote:

   Another key is to remember that this discussion also applies to the
 conductor between the main panel and subpanel. In a large PV system, this
 could result in a pretty large wire between the two panels, and a
 significant cost that is often overlooked. In some cases it makes sense to
 locate the subpanel close to the main panel and run multiple sets of smaller
 wires from the inverters to the subpanel.



 And because the calculation is based on the first OC protection connected
 to the inverters, adding a main breaker (theoretically 80A in this example)
 in the subpanel doesn’t change things. Even though this wire would be
 theoretically protected by an 80A breaker at each end, you can’t size the
 wire for 160A / 1.2 = 133.3A. You have to size for 180A/1.2 = 150A. (not
 that it makes much of a difference in this example, but it still must be
 considered)



 At least that’s how I understand it…



 Jason Szumlanski

 Fafco Solar





 *From:* re-wrenches-boun...@lists.re-wrenches.org [
 mailto:re-wrenches-boun...@lists.re-wrenches.orgre-wrenches-boun...@lists.re-wrenches.org]
 *On Behalf Of *Mark Frye
 *Sent:* Wednesday, March 30, 2011 1:33 AM
 *To:* 'RE-wrenches'
 *Subject:* Re: [RE-wrenches] sizing a sub-panel used to
 combinemultipleinverter outputs



 Opps!



 My bad, I was thinking of a single phase system, not the three phase system
 shown in the article.



 For the three phase system Kent is correct in counting 180A of supply per
 bar.



 Mark Frye
 Berkeley Solar Electric Systems
 303 Redbud Way
 Nevada City,  CA 95959
 (530) 401-8024
 www.berkeleysolar.com




  --

 *From:* re-wrenches-boun...@lists.re-wrenches.org [
 mailto:re-wrenches-boun...@lists.re-wrenches.orgre-wrenches-boun...@lists.re-wrenches.org]
 *On Behalf Of *Mark Frye
 *Sent:* Tuesday

Re: [RE-wrenches] NABCEP Stamp

[Andrew Truitt]

Troy - I have not encountered this before but would you mind sharing what
city agency you are refering to?  NABCEP is always interested in hearing
about these types of unconventional uses of the certification.


For a brighter energy future,

Andrew Truitt
Principal
Truitt Renewable Energy Consulting
NABCEP Certified PV Installer™ (ID# 032407-66)
(202) 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713

[image: 24 copy.jpg]

Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough




On Wed, Mar 30, 2011 at 11:04 AM, Troy Harvey tahar...@heliocentric.orgwrote:

 I am wondering if anyone has had a NABCEP stamp made to stamp plans. I have
 a city agency who is comfortable with the NABCEP certification as a
 qualification, but would like to see a stamp. Has anyone out there done
 this?

 Troy

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org


24 copy.jpg___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Seam clamps with or w/o rails

[Andrew Truitt]

Additional things to consider:

1) Wire management for S-5 direct-mount can be challenging, though the new
S-5s do have wire management clips built into the mounting discs.

2) If you do go with the direct-mount start with the bottom row of S-5s.
Get it very straight and level and then install you first row of modules.
Then install the second row of S-5s and tighten the clamps on the first row
and repeat.  This is easier if the roof in not steep.

3) As Jeff said, your torque wrench is your friend.  It should be used on
every clip.

4) The one thing that has always freaked me out about retrofitting S-5s on
standing seam roofs is that it can be hard to know how solid the roof is
connected to the structure.  If you have the same concerns then that is an
argument for the direct-mount method as there will be less upforce on the
array.

5) This is slightly off-topic and has been addressed in this forum
previously, but if you do opt for the rail-mounted solution I recommend
using a grounding method that does not render the module ungrounded as soon
as you loosen the mounting hardware.  The WEEB lug is an excellent product
for this.  The WEEB clip, as far as I'm concerned, is just dangerous.

6) Speaking of grounding, what is your plan for grounding the roof?  In the
past I have simply grounded a couple of standing seam panels with tin-plated
copper lugs, but I'm curious if any of you wrenches think that further /
different steps should be taken.


For a brighter energy future,

Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)
Truitt Renewable Energy Consulting
(202) 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713

[image: 24 copy.jpg]

Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough




On Fri, Feb 18, 2011 at 12:09 PM, Jeff Oldham starpowe...@juno.com wrote:

 Also be careful w/high standoffs (keep the rail as close to the S-5! as
 possible) or that long lever will rock the S-5! and loosen it on the seam
 forcing a lot of back and forth to re-tightening set screws. A torque wrench
 properly set will also be helpful in preventing this. It is indeed easier
 w/rails but sure looks a lot better w/o them!

 Good luck!
 -jeff


 From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative
 SOLutions


 
 *Brooks*
 LOVE IT. SHOOT IT. LIVE IT. Â Learn how! Â
 http://thirdpartyoffers.juno.com/TGL3132/4d5ec427935ed3366c9st03vuc
 contact.brooks.eduhttp://thirdpartyoffers.juno.com/TGL3132/4d5ec427935ed3366c9st03vuc
 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org



24 copy.jpg___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Matching modules into Xantrex GT

[Andrew Truitt]

William -

Over powering is not an issue.  You might clip a little power occasionally,
but the loss will be minute and you won't damage or void the warranty of the
inverter.   And since your talking separate strings, the current mismatch is
a non-issue.  The only loss you will incur will be due to your voltage
mismatch,  and I suspect it will be somewhere is the neighborhood of 2.5%

1 - (382 / 403) = .05
.05 / 2 = .025

Make sense?  (I'm a little hung over so forgive me if it doesn't)

Andrew Truitt
Truitt Renewable Energy Consulting
202 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713


Please excuse brevity and typos - this message was typed on tiny keys.

On Jan 15, 2011 11:44 AM, William Miller will...@millersolar.com wrote:

 Friends:

I have a client with a Xantrex GT2.8 inverter.  Feeding it are 8 Solar World
SW175 modules.  This is half the modules that this inverter can handle.  The
client wants to realize the full potential of this inverter.  Adding 8
additional SW175 modules would be ideal, but they are no longer
manufactured.

I need to find a group of modules to match the 175s.  I am contemplating 9
SW240s.  The specifications for this match up are below.  I imagine the IV
curves are similar for these two modules as they are the same chemistry and
the same manufacturer.

8-SW175 9-SW240
Voc 403 382
Vmp 283 275
Imp 4.957.87
Pcsi12521715
Ptotal  2.967

Might this match be close enough?  I know this over-powers the inverter
slightly.  I imagine that the Xantrex will self regulate this very rare over
wattage condition.

Comments?

William Miller



 *Please note new e-mail address and domain:

*William Miller
Miller Solar
Voice :805-438-5600
email: will...@millersolar.com
http://millersolar.com
License No. C-10-773985

___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Internet-based monitoring

[Andrew Truitt]

Joel - Check out Locus Energy (http://locusenergy.com/).  Key features:

- Production and demand monitoring
- single and 3-phase options
- relatively simple to install (for single-phase at least)
- inverter direct monitoring for some manufacturers
- user configurable performance alert emails
- reasonable price point
- good customer service

Ask for Adrian and tell him Drew sent you... and he'll probably charge you
double.

Andrew Truitt
Truitt Renewable Energy Consulting
202 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713

Please excuse brevity and typos - this message was typed on tiny keys.

On Nov 26, 2010 8:43 PM, Philip Boutelle philboute...@gmail.com wrote:

Joel,
I have installed a few more eGuage units since I last posted about them.
Each time, the end-user has been totally satisfied with what they ended up
with. I haven't installed these in any commercial systems, but have them in
several massive residential jobs (400-800A services). eGauge has an internal
web server, so the hosting is free; no monthly service fee ever. Aside from
showing generation (or usage if wanted), there is not much on the
trouble-shooting side. For more info you need an inverter-direct system from
Fat Spaniel or Energy REcommerce, and even then you don't get much beyond
aggregate DC numbers and inverter error messages unless you spring for
string monitoring and/or a weather station. Or if you happen to have SMA
inverters, use their WebBox; we have several of those on commercial sites,
work great, also free hosting. If you are looking for a single portal to
host everything, you'll have to stick to third party unless you have all the
same brand inverters.
Adding monitoring to 50 sites in several states is no small project, and
won't be cheap. And since you specify internet-based, be prepared for a lot
of time troubleshooting networks. On commercial sires, this can be pretty
tough (you might need a static IP address, etc). That being said, you should
avoid a product that won't be there to support you through those
installations and all the networking trouble you are bound to hit.
-Phil




On Thu, Nov 25, 2010 at 2:48 PM, Joel Davidson joel.david...@sbcglobal.net
wrote:

 Hello Wre...

___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Charge Control in AC coupled system

[Andrew Truitt]

Drake - fyi: you will void the warranty on the Enphase inverters.

Andrew Truitt
Truitt Renewable Energy Consulting
202 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713

Please excuse brevity and typos - this message was typed on tiny keys.

On Oct 29, 2010 7:42 AM, Drake drake.chamber...@redwoodalliance.org
wrote:

Greetings Wrenches,

I want to AC couple 8 Enphase M190s to a pair of Outback inverters, stacked
in split phase.  The use of micro inverters could allow for great method of
controlling charge to the batteries.  A morning Star Relay Driver could be
employed to disconnect one or more inverters at a time, to taper charge.

Have any Wrenches AC coupled this many Enphase micro inverters to Outbacks?
  Have you had any problems?

Thank you,

Drake





At 05:07 PM 10/28/2010, you wrote:

 We have done several of these systems with various invert...
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Enphase warranties

[Andrew Truitt]

When I asked Enphase about AC coupling with their product a year ago the
answer was a flat NO, so at least it appears they're moving in the right
direction...


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)
Truitt Renewable Energy Consulting
(202) 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713



Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough



On Fri, Oct 29, 2010 at 1:43 PM, Mark Frye ma...@berkeleysolar.com wrote:

  Indeed an interesting game.

 However, I am considering Enphase for a large res retrofit which will
 recieve CSI funding. I am obligated to provide my customer equipment that
 will be warrantied by the manufacture for 10 years. I have to have certainty
 NOW that the warranty will be honored in the application. I can not base the
 fulfillment of my contractual obligations on the passing whim of the support
 technician of the day. My project involves placing the Enphase below the ATS
 on a gen back up system, an application which Ehphase will not warrant in
 writing.

 So the question is, can I do the project at all? All you folks who are
 putting Enphase on the load side of grid-tied, battery based inverters need
 to ask yourself the same question. It appears that Nick already has his
 answer.

 Mark Frye
 Berkeley Solar Electric Systems
 303 Redbud Way
 Nevada City,  CA 95959
 (530) 401-8024
 *www.berkeleysolar.com* http://www.berkeleysolar.com/


  --
 *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto:
 re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Nick Soleil
 *Sent:* Friday, October 29, 2010 12:33 PM

 *To:* RE-wrenches
 *Subject:* Re: [RE-wrenches] Enphase warranties

  I bet if you don't push the issue, they will cover the warranty.  If
 the inverter is truly failed, I  am sure that you won't have an issue.  But
 since they are so reliable, that probably won't happen anyway.  However, if
 you were to install them in an ''off-grid application, you can't expect
 them to guarantee the performance, which is what a 'written' guarantee
 implies.  I bet SMA won't provide a written guarantee that they will perform
 when coupled to an FX inverter, either.


 Nick Soleil
 Project Manager
 Advanced Alternative Energy Solutions, LLC
 PO Box 657
 Petaluma, CA 94953
 Cell: 707-321-2937
 Office: 707-789-9537
 Fax: 707-769-9037

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org





--
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] The perfect solar ready roof

[Andrew Truitt]

If you ask me this is a dream scenario.  The scary thing about S-5!s is that
you rarely know how often the roofing panels are attached to the decking and
how well the decking is attached to the framing.  In this case you can
direct the roofer to fasten the roof as often as you want.  I had a PE do an
analysis for a sure-fire acceptable attachment method for a standing seam
roof given: 90 mph wind zone, 18 wide standing seam roofing panels,
flush-mounted PV array (modules to rail to S-5!s, no tilt legs), and his
result was that if the roofing panels are fastened every 4 along each seam
you are in the clear.  He did not address the decking-to-framing attachment,
but while the roof is off you could add as many fasteners as you want.  If
the structure of the roof is in question I would definitely have a PE look
at it and stamp the plans before proceeding, but once you have everything
under the roof robust and approved, you are primed and ready for a
worry-free, penetration-free S-5!-to-standing-seam array install.

In another email string someone mentioned issues with S-5!s slipping down
the roof due to snow which is why I recommend attaching at every seam and
breaking out that torque-wrench when installing.

Good luck!


Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)
Truitt Renewable Energy Consulting
(202) 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713



Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough



On Wed, Oct 20, 2010 at 2:32 PM, Kristopher Schmid sol...@legacysolar.com
wrote:

What about screwing in double 2x6s flush to the roof deck between the beams
where your feet will attach and lag bolting into that?  Definitely check
with the beam manufacturer first, though.



Kris

Legacy Solar
864 Clam Falls Trail
Frederic, WI 54837
715-653-4295
sol...@legacysolar.com
www.legacysolar.com

-Original Message-
*From:* re-wrenches-boun...@lists.re-wrenches.org [mailto:
re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Scott McCalmont
*Sent:* Wednesday, October 20, 2010 12:00 AM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] The perfect solar ready roof

In general, you shouldn't drill or cut the flanges on engineered wood beams.
I think that eliminates lag screws into the rafters. They probably wouldn't
have the same pull-out strength as a lag screw into a conventional rafter,
either.

Scott

On Oct 19, 2010, at 7:58 PM, Chris Daum wrote:


  Dear Wrenches:
 I have a composite (shingle) roof at hand, and the owner wants to upgrade
it to a metal roof and install a 5kw+ array on it.   The rafters are those
(sort of) particle board I-beams covered with 1/2 plywood (and shingles).
What's the best metal roofing you could suggest--and would you beef up the
wood to lag into?
 Thanks for all your input.
  Chris Daum
Oasis Montana Inc.
406-777-4309
406-777-0830 fax
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org



___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org





--
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

[RE-wrenches] Target fire

[Andrew Truitt]

Does anyone know who installed the infamous Bakersfield Target job?



Andrew Truitt
NABCEP Certified PV Installer™ (ID# 032407-66)
Truitt Renewable Energy Consulting
 (202) 486-7507
http://www.linkedin.com/pub/andrew-truitt/8/622/713



Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Target fire

[Andrew Truitt]

Thanks Matt!  Just what I was looking for.

I have a friend who does PV commissioning for a major government agency and
he has caught numerous major installation errors that posed serious safety
concerns.  It seems to me that a comprehesive 3rd party inspection of all
commercial/utility scale systems should be the norm throughout the industry,
not just for governmental systems.


- Andrew



On Mon, Oct 18, 2010 at 2:12 PM, Matt Lafferty gilliga...@gmail.com wrote:

  Andrew,

 The General/Prime Contractor on the job was SunPower vis a vis
 Powerlight. As per standard operating procedures there, the actual
 installation was subbed out. I don't recall which subs they used on this
 job, but there was more than one. Per their normal routine, one sub installs
 the racking, modules, and wiring from the modules to the combiners. This sub
 can have any one of several different license classifications. They use an
 electrical sub to install the combiners, homeruns, inverters,
 interconnection. The electrical sub is responsible for terminations.

 Although I wasn't onsite to inspect the charcoal, I believe there were
 multiple shorts, not just the separated coupling in the homerun. I suspect
 there was at least one ground-fault in the array prior to whatever happened
 at the coupling. If this was the case, then BOTH SUBCONTRACTORS FAILED. They
 are both at least partially responsible for what happened there.

 I have seen the racking system that was used on the Bakersfield project.
 The vintage used there had SEVERE problems with wire management. Absolute
 crap! Ground faults are common with that racking system. I have
 personally witnessed a system running with 8 amps of current on the ground
 using the same racking system. This was NOT on the Bakersfield
 site. Although I wasn't permitted to troubleshoot the problem, I was told
 that they had been chasing the ghost for several months. Ever since the
 initial installation. I have it from reliable sources that this condition is
 common and a known flaw in the design. At that time, their philosophy was
 that a ground fault is acceptable as long as there isn't enough current to
 trip the inverter offline. Central inverters commonly have up to a 10 amp
 GFP, so you can have one or more strings directly shorted and keep running.

 The concept that they kept installing systems with a known flaw like
 this is beyond acceptable. SunPower ultimately bears the greatest share of
 responsibility here. I do not know whether they have corrected the crappy
 wire management in that racking system since then or not. I certainly hope
 they have either corrected it or stopped using the system altogether.

 A comprehensive commissioning process would identify these problems and
 prevent the system from being placed into service. A visual inspection is
 the beginning of any commissioning process. As I said, I have seen these
 systems and they ain't pretty. Any schmuck can easily see numerous wires
 pulled across sharp-edges of sheet metal at various points throughout the
 array. Fail #1. Megger output jumpers... Fail #2.

 The concept that any building department has signed one of these systems
 off at all is mind-boggling. Another thing I find interesting... There was
 no mention of this condition in the fire investigation report. Only a
 recommendation to megger the remaining wires. What's up with that? How is it
 that so many of these systems have been installed and passed inspection? How
 many have caught fire that we haven't heard about? You know... Just a little
 fire.

 I would LOVE to know how much downtime has been logged because of this
 dangerous problem. And how much money has been spent troubleshooting and
 fixing faults caused by this problem. And how many technicians have been
 shocked during installation or service? One thing I can guarantee you...
 Unless you work inside the bowels of SunPower or this information comes out
 in a lawsuit somewhere, we will never know. Maybe WikiLeaks will have
 something on this someday. But I'm not holding my breath.

 For the record, I'm not a SunPower hater. I do hate crappy workmanship. I
 hate the practice of covering up crappy workmanship even more. You see, when
 you cover it up, it's just gonna keep happening. At least until somebody
 calls you on it.

 $0.02001

 Solar Janitor

  --
 *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto:
 re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Andrew Truitt
 *Sent:* Monday, October 18, 2010 12:04 PM
 *To:* RE-wrenches

 *Subject:* Re: [RE-wrenches] Target fire

 Thanks William.  That is the first place I looked but I didn't see it in
 there.  But I love all the resources on your website!


 - Andrew
  On Mon, Oct 18, 2010 at 12:47 PM, William Miller will...@millersolar.com
  wrote:

  Andrew:

 It may be in the report:
 http://mpandc.com/practices/Safety/safety_data.html

 William


 At 11:30 AM 10/18/2010, you wrote:

   Does anyone know who

Re: [RE-wrenches] Split Panel Interconnection

[Andrew Truitt]

Replace it.  If you are talking about a split-bus panel then my
understanding is that they are no longer code-compliant.  I'm sure there are
wrenches on this list that are much more familiar with these panels than I
am, but every electrician and inspector that I've talked to about them have
advocated for replacement.


- Andrew Truitt



On Tue, Sep 28, 2010 at 3:27 PM, Eric Thomas solarepiph...@gmail.comwrote:

 Hello,

 We are bidding an 8kW grid tied PV system that will interconnect with a
 split panel. The panel has a main lug on the top portion and branch
 circuits on the lower portion. Does anyone have experience with backfeedig
 these panels? What's the best method?

 Thanks,

 Eric Thomas
 Solar Epiphany LLC

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org





-- 
Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] The Demise of WEEB

[Andrew Truitt]

Brian - Thank you for your kind words!  I will agree that the current
practice for installing ground lugs - be it anything from the minimalist
thread-forming screw method on up to the more cumbersome John Wiles
method - leaves something to be desired.  I would love to see the industry
get together on a common, user-friendly, UL listed standard practice, but I
think I'm preaching to the choir on that one...

Regarding installer error, I will point out that the WEEB clip is also
susceptible to this scenario.  I think the only fair comparison is between a
well-installed WEEB Clip and and a well-installed grounding lug, and in that
comparison I'll take the one that maintains its bond when the module is
unfastened from the racking structure.

Finally, thank your for developing the WEEB Lug!  It is a wonderful piece of
hardware that bonds rails beautifully.  If you could find a way to get the
cost down (does it need all that material?) I think something like that
could succeed as a universal module grounding method.


Keep up the good work!

Andrew Turitt




On Tue, Sep 14, 2010 at 3:34 PM, Brian Wiley b...@we-llc.com wrote:

  Mr. Truitt,

 You are obviously a talented installer, but please allow me to comment on
 your point number 2.

 The clip acts something like a mini-rivet and will still be connected when
 the clamp is loosened. You will have to yank the clip off and possibly
 damage it, which is why they are recommended for one-time use.

 A tin-plated lug will last, but it is the attachment to an anodized
 aluminum frame that may not. Many are installed with a stainless steel
 thread forming screw. The original installer might have carelessly stripped
 the threads or screwed it in multiple times so that the connection was not
 that good to start with. We have also seen that in a high salt environment
 the formed thread is a place for corrosion to begin and over time, the screw
 hole can corrode until the lug falls off!

 I would recommend the safest practice is to assume that there will not be a
 ground when you remove any module.

 Best Regards,
 Brian Wiley
 Wiley Electronics LLC
 845.247.6163
 www.we-llc.com



 On 9/14/2010 1:31 AM, Andrew Truitt wrote:



 2 points:

 1) For the sake of clarity: there are WEEB LUGS 
 http://www.we-llc.com/Datasheets/204-0404-03.pdf and WEEB CLIPS 
 http://www.we-llc.com/Datasheets/204-0404-07.pdf.  WEEB Lugs are
 comprised of very robust tin-plated copper lugs, stainless steel hardware,
 and the actual WEEB, which is the stainless steel nippled washer that
 pierces aluminum anodization.  WEEB Clips are simply stainless steal nippled
 washers that are installed between module and rail that form a bond,
 theoretically eliminating the need to bond the module to a ground wire, so
 long as the rails are properly grounded.


 2) My biggest concern with the WEEB Clip is that the moment a top-clamp is
 loosened the module is no longer grounded!!!  To me that is not a good
 grounding method.  Mr Wiley is obviously a talented inventor and he makes a
 strong argument for the quality of the bond that the WEEB Clip provides when
 the clip is installed properly and all mounting hardware is properly
 torqued.  What I don't understand is the argument that this is as safe of a
 product as a properly installed outdoor rated lug for the service tech who
 has to work on that array.


 A tin-plated copper lug with a stainless steel set screw will last.  A
 service tech working on a faulted array that was grounded with WEEB Clips
 might not.



 Andrew Truitt
 Free agent
 Golden, CO.



 On Mon, Sep 13, 2010 at 10:04 PM, benn kilburn b...@daystarsolar.camailto:
 b...@daystarsolar.ca wrote:

Hopefully any crew installing PV, and familiar with this debate
(which they should be) can easily distinguish between the GBL-4
and the GBL-4DBT.  The weight difference is quite noticeable.  If
it feels light for its size, it's aluminum, dont use it!!!  If it
has some distinct weight to it, then it's most likely the copper
DBT, giv'er!

So what other non-conductive materials are out there that could
help resolve this frame bonding issue?
  Sunteck's BIPV SolarBlend module uses a polycarbonate frame
which requires no bonding.  Do any of you have any experiences
with these? How were they to handle, install?  Do they offer any
hope or support for non-metallic module frames?

benn
DayStar Renewable Energy Inc.
b...@daystarsolar.ca mailto:b...@daystarsolar.ca

780-906-7807
HAVE A SUNNY DAY

  
From: r...@solarray.com mailto:r...@solarray.com

Date: Mon, 13 Sep 2010 11:14:36 -0600
To: re-wrenches@lists.re-wrenches.org
mailto:re-wrenches@lists.re-wrenches.org


Subject: Re: [RE-wrenches] The Demise of WEEB

I didn't do the original  install, and I couldn't ID the lug
because of the corrosion.
I believe everyone is correct

Re: [RE-wrenches] Accessable?

[Andrew Truitt]

Benn - I like installing j-boxes under the array as a general rule both for
aesthetics and to keep them somewhat sheltered from the elements.  I do not
see any code issues with the location because, as you mention, they are
still accessible.


From NEC2008 Article 100:

*Accessible (as applied to equipment)*. Admitting close
approach; not guarded by locked doors, elevation, or other
effective means.

*Accessible (as applied to wiring methods)*. Capable of
being removed or exposed without damaging the building
structure or finish or not permanently closed in by the structure
or finish of the building.



- Andrew




On Wed, Sep 15, 2010 at 3:15 AM, benn kilburn b...@daystarsolar.ca wrote:

  Wrenches,
 There has been some mention on this list lately of locating Soladeck and/or
 other combiner boxes under arrays.  This has me wondering if folks are doing
 this only for a cleaner looking roof array or if there are other
 reasonable intentions (lack of available roof space).

 Other than a cleaner look, i see no benefit to doing this. (don't get me
 wrong, a cleanly installed array is something to be proud of)  However if
 the box ever needs to be accessed, you have to remove at least one module to
 get to it, dealing with the whole 'breaking the bond' issue; having to
 remove the module, replacing the WEEB clip or undoing and then re-torquing
 the lug set screw, re-installing module, etc.  If you just wanted to quickly
 check something in the box (voltage, torque, whatever) it is no longer a
 quick and easy task.

 So the Canadian Electrical Code says in Section 0.Definitions

 *Accessible* (as applied to equipment) - admitting close approach because
 the equipment is not guarded by locked doors, elevation, or other effective
 means.

 *Accessible* (as applied to wiring methods) -
 (a) not permanently closed in by the structure or finish of the building;
 and
 (b) capable of being removed without disturbing the building
 structure or finish.

 My interpretation here is that;
 (a) the box is not 'permanently closed in', just inconveniently closed in.
 and,
 (b) you are not disturbing the structure or finish, as you will be
 replacing the module as soon as you are finished in the box.

 Many pieces of equipment and/or panels require that you remove a single
 piece or a multi-piece cover to access the wiring.  The pv module is like a
 large 'cover' in this case. So i do not see this as a code violation.  Do
 you?

 I'm not familiar with the NEC, is it's definition of 'accessible' similar
 to the CEC's?

 Is this combiner mounting location under the array common practice for some
 of you, or only done when roof space for a combiner box is limited?

 I am going to run this scenario by one of our inspectors, i just thought
 i'd get some feedback from other Wrenches first.

 cheers,
 benn
 DayStar Renewable Energy Inc.
 b...@daystarsolar.ca
 780-906-7807
 HAVE A SUNNY DAY



 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org





-- 
Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] The Demise of WEEB

[Andrew Truitt]

William - Actually, that is not the case.  The way I was taught to install
modules is by setting the module on the rail with the ground lug on the
elevated section of frame, connecting the ground wire and module conductors,
then lowering the module onto the rails and tightening the clamps.  The
rigidity of the solid copper ground keeps the wire recessed under the module
(i.e. no angle to the dangle) and allows each module to then be unclamped
and accessed while remaining grounded.


I think a WEEB jumper is a great idea and could help to solve the WEEB Clip
issue.



- Andrew




On Tue, Sep 14, 2010 at 1:52 AM, William Miller will...@millersolar.comwrote:

  Andrew:

 You make a very good point in 2) below, however there is one step missing:
 If a ground fault is occurring, the technician will eventually need to look
 under modules to find the fault.  This is the reason the top-down clips will
 be loosened.  If the module is grounded with #6 wire, the wire will prevent
 the module from being lifted.  Therefore, the lug will also be loosened,
 un-grounding the module -- creating the unsafe condition you described.

 WEEB clip or WEEB lug, the technician dies.

 Should we invent a WEEB jumper cable to maintain module bond while the
 modules are being lifted?

 William Miller




 At 07:44 PM 9/13/2010, you wrote:



 2) My biggest concern with the WEEB Clip is that the moment a top-clamp is
 loosened the module is no longer grounded!!!  To me that is not a good
 grounding method.  Mr Wiley is obviously a talented inventor and he makes a
 strong argument for the quality of the bond that the WEEB Clip provides when
 the clip is installed properly and all mounting hardware is properly
 torqued.  What I don't understand is the argument that this is as safe of a
 product as a properly installed outdoor rated lug for the service tech who
 has to work on that array.


 A tin-plated copper lug with a stainless steel set screw will last.  A
 service tech working on a faulted array that was grounded with WEEB Clips
 might not.



 Andrew Truitt
 Free agent
 Golden, CO.


 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org





-- 
Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] The Demise of WEEB

[Andrew Truitt]

2 points:

1) For the sake of clarity: there are WEEB
LUGShttp://www.we-llc.com/Datasheets/204-0404-03.pdfand WEEB
CLIPS http://www.we-llc.com/Datasheets/204-0404-07.pdf.  WEEB Lugs are
comprised of very robust tin-plated copper lugs, stainless steel hardware,
and the actual WEEB, which is the stainless steel nippled washer that
pierces aluminum anodization.  WEEB Clips are simply stainless steal nippled
washers that are installed between module and rail that form a bond,
theoretically eliminating the need to bond the module to a ground wire, so
long as the rails are properly grounded.

2) My biggest concern with the WEEB Clip is that the moment a top-clamp is
loosened the module is no longer grounded!!!  To me that is not a good
grounding method.  Mr Wiley is obviously a talented inventor and he makes a
strong argument for the quality of the bond that the WEEB Clip provides when
the clip is installed properly and all mounting hardware is properly
torqued.  What I don't understand is the argument that this is as safe of a
product as a properly installed outdoor rated lug for the service tech who
has to work on that array.


A tin-plated copper lug with a stainless steel set screw will last.  A
service tech working on a faulted array that was grounded with WEEB Clips
might not.



Andrew Truitt
Free agent
Golden, CO.



On Mon, Sep 13, 2010 at 10:04 PM, benn kilburn b...@daystarsolar.ca wrote:

  Hopefully any crew installing PV, and familiar with this debate (which
 they should be) can easily distinguish between the GBL-4 and the GBL-4DBT.
  The weight difference is quite noticeable.  If it feels light for its size,
 it's aluminum, dont use it!!!  If it has some distinct weight to it, then
 it's most likely the copper DBT, giv'er!

 So what other non-conductive materials are out there that could help
 resolve this frame bonding issue?
   Sunteck's BIPV SolarBlend module uses a polycarbonate frame which
 requires no bonding.  Do any of you have any experiences with these? How
 were they to handle, install?  Do they offer any hope or support for
 non-metallic module frames?

 benn
 DayStar Renewable Energy Inc.
 b...@daystarsolar.ca
 780-906-7807
 HAVE A SUNNY DAY
 --
 From: r...@solarray.com
 Date: Mon, 13 Sep 2010 11:14:36 -0600
 To: re-wrenches@lists.re-wrenches.org

 Subject: Re: [RE-wrenches] The Demise of WEEB

 I didn't do the original  install, and I couldn't ID the lug because of the
 corrosion.
 I believe everyone is correct that this isn't the DBT rated lug, though.
 Another reason to use the WEEB:  a crew can't accidentally install the
 wrong (but almost identical, when new) lug.
 I'm sure the non-DBT lugs got mixed together in a bin at some point.

  R. Walters
 r...@solarray.com
 Solar Engineer




 On Sep 12, 2010, at 5:41 PM, Jamie Johnson wrote:

   That looks like a tin plated aluminum lug (aluminum corrosion) with a
 plated steel screw (rusted screw)...

 Here is an explanation of the differences between both ILSCO GBL 4 lugs
 from John Wiles Code Corner in Homepower issue 102

 The Ilsco GBL-4DBT is a lay-in lug
  made of solid copper, which is then tin-plated. It has a
 stainless steel screw to hold the wire. The lug accepts a #14
 (2 mm2) to #4 (21 mm2) copper conductor. It is listed for
  direct burial (DB) and outdoor use and can be attached to
 aluminum structures (the tin plate). The much cheaper Ilsco
 GBL-4 lug looks identical, but is tin-plated aluminum, has
 a plated screw, and is not listed for outdoor use.

 Jamie Johnson
 NABCEP Certified Solar PV Installer #031310-118
 General Manager
 SOLAR POWER ELECTRIC
 EC13001765


  Original Message 
 Subject: Re: [RE-wrenches] The Demise of WEEB
 From: Peter Parrish peter.parr...@calsolareng.com
 Date: Sun, September 12, 2010 6:50 pm
 To: 'RE-wrenches' re-wrenches@lists.re-wrenches.org

 Are you sure that's a ILSCO GBL-4DBT lug? I am pretty sure the set screw is
 not SS, which it should be to be the genuine part.

 - Peter


 Peter T. Parrish, Ph.D., President
 California Solar Engineering, Inc.
 820 Cynthia Ave., Los Angeles, CA 90065
 CA Lic. 854779, NABCEP Cert. 031806-26
 peter.parr...@calsolareng.com
 Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885



 -Original Message-
 From: re-wrenches-boun...@lists.re-wrenches.org
 [mailto:re-wrenches-boun...@lists.re-wrenches.orgre-wrenches-boun...@lists.re-wrenches.org]
 On Behalf Of R Ray
 Walters
 Sent: Sunday, September 12, 2010 3:10 PM
 To: RE-wrenches
 Subject: Re: [RE-wrenches] The Demise of WEEB

 A picture is worth a thousand words, (hopefully this will upload)
 Here's a traditional Ilsco Lug after less than 5 years near the ocean:


 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org

Re: [RE-wrenches] Testing LSAs

[Andrew Truitt]

Question: Since the Delta lightning arrestors are not UL Listed, do they
threaten the UL compliance of the PV system as a whole?


- Andrew Truitt
Currently of Standard Solar
Free agent in the Denver area as of 10/6/10



On Tue, Aug 24, 2010 at 6:02 PM, Peter Parrish 
peter.parr...@calsolareng.com wrote:

 I would think that an ohmmeter set to the 10 Mega-ohm setting (or the
 highest setting possible), would be the first test. I would like to see
 something on the order of 750 k-ohms (3/4 of a mega-ohm).

 But the system should be tested at a higher voltage, than that available
 from a DMM. Apply 240 Vac and measure the RMS current. It should be should
 be 0.3 mA or less.

 Finally, these puppies really need to be tested at much higher voltages,
 perhaps someone knows how to use that megohmmeter to test? What does the
 manu recommend, “if suspect, throw it away and buy a new one”?

 - Peter

 Peter T. Parrish, Ph.D., President
 California Solar Engineering, Inc.
 820 Cynthia Ave., Los Angeles, CA 90065
 CA Lic. 854779, NABCEP Cert. 031806-26
 peter.parr...@calsolareng.com
 Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885


 
 From: re-wrenches-boun...@lists.re-wrenches.org
 [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kristopher
 Schmid
 Sent: Tuesday, August 24, 2010 1:30 PM
 To: 'RE-wrenches'
 Subject: [RE-wrenches] Testing LSAs

 What is the best method for testing the integrity of a DC and/or AC
 lightning surge arrestor?  Specifically, i use the Delta LA units.  I know
 they should be replaced if they look Bar-B-Qued, but otherwise...?

 Thanks,
 Kris Schmid

 Legacy Solar
 864 Clam Falls Trail
 Frederic, WI 54837
 715-653-4295
 sol...@legacysolar.com
 www.legacysolar.com


 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org




-- 
Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

[RE-wrenches] Green-Fasten

[Andrew Truitt]

Greetings Wrenches!  Has anyone used the
Green-Fastenhttp://www.ecofastensolar.com/our-products/green-fastenproduct
from EcoFasten?  If so, what has been your experience?  I've
compared it with 3 other integrated footing/flashing products (EcoFasten
Quick-foot, TTI Flat Jack and Quickmount PV Composition mount) on the basis
of perceived effectiveness, ease of install and price and it has emerged
victorious, but I would love to hear about some field experience before
placing an order.

And while I'm at it, has anyone used the Milwaukee
Sub-Scannerhttp://www.northerntool.com/shop/tools/product_200399117_200399117uber-stud-finder?
 What has been your experience in locating the centers and
edges of rafters through multiple layers of composition shingle?


Thanks in advance,

Andrew Truitt
Standard Solar Inc.



-- 
Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

[RE-wrenches] Unshaded micro-inverter performance

[Andrew Truitt]

Is anyone aware of a third-party report or study on the performance of
unshaded string inverter systems vs. unshaded micro-inverter systems?
Enphase claims a 5-25% increase, and uses a small-commercial SunEd
installhttp://www.solarindustrymag.com/e107_plugins/content/content_lt.php?content.4376as
evidence, but I'd like to see something beyond a single performance
ratio.  It would be great to see something that incorporates multiple module
types and their tolerances for voltage and current.  Could make a good
SolarPro article...


Andrew Truitt
Standard Solar Inc.



-- 
Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Unshaded micro-inverter performance

[Andrew Truitt]

Darryl - We use Locus Energy as our third-party, production + demand
monitoring and we've been pretty happy with them.  Not always the easiest
thing to install and make look good but it does work!  A little pricier than
TED though.


- Andrew


On Mon, Jun 7, 2010 at 10:40 AM, Darryl Thayer daryl_so...@yahoo.comwrote:

 Hi I have such a set up but the monitoring would be the problem.  I think I
 would want a thing like a TED that works.
 Darryl

 --- On *Mon, 6/7/10, Andrew Truitt atru...@gmail.com* wrote:


 From: Andrew Truitt atru...@gmail.com
 Subject: [RE-wrenches] Unshaded micro-inverter performance
 To: RE-wrenches re-wrenches@lists.re-wrenches.org
 Date: Monday, June 7, 2010, 9:29 AM



 Is anyone aware of a third-party report or study on the performance of
 unshaded string inverter systems vs. unshaded micro-inverter systems?
 Enphase claims a 5-25% increase, and uses a small-commercial SunEd 
 installhttp://www.solarindustrymag.com/e107_plugins/content/content_lt.php?content.4376as
  evidence, but I'd like to see something beyond a single performance
 ratio.  It would be great to see something that incorporates multiple module
 types and their tolerances for voltage and current.  Could make a good
 SolarPro article...


 Andrew Truitt
 Standard Solar Inc.



 --
 Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
 to fission. And it just so happens that there's an enormous fusion reactor
 safely banked a few million miles from us. It delivers more than we could
 ever use in just about 8 minutes. And it's wireless!

 ~William McDonough


 -Inline Attachment Follows-

 ___
 List sponsored by Home Power magazine

 List Address: 
 RE-wrenches@lists.re-wrenches.orghttp://mc/compose?to=re-wrenc...@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org



 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org





-- 
Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Exterior conduit in corrosive environments

[Andrew Truitt]

William,

We are also in the market for a good non-corrosive solution for coastal
locations.  We just finished a job with aluminum EMT with threaded couplings
and it worked fine, but that job happened to have a simple DC conduit run.
I can imagine things getting a lot more difficult when trying to thread bent
conduit into a complex wall-mounted run.  Are there really no rain-tight
aluminum compression fittings in existence?

My electrician advocates using PVC in these environments.  My arguments
against that are 1) aesthetics and 2) durability of the joints considering
temperature degradation of the glue and thermal cycling of the material.
What do you [all] think?



Andrew Truitt
Standard Solar Inc.


p.s. - I sent something out on Expansion Fittings yesterday but it never
showed up in my inbox, though I did get one response to it that was
addressed just to me.  Did anyone else get that one?  Very strange...






On Mon, May 3, 2010 at 1:18 PM, William Miller will...@millersolar.comwrote:

  Friends:

 We are just completing a non-penetrating roof mount in a beach
 environment.  We chose aluminum rigid for our PV feeders.  Cost about 1.30
 per foot, easy to work with (for real electricians -- you need to have a
 threader and rigid experience).  I recommend it.

 William Miller

  *Please note new e-mail address and domain:

 *William Miller
 Miller Solar
 Voice :805-438-5600
 email: will...@millersolar.com
 http://millersolar.com
 License No. C-10-773985

 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org





-- 
Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Service Magic update request

[Andrew Truitt]

We never used Service Magic for lead generation but I did find our
structural PE there and it has worked out great.


Andrew Truitt
Standard Solar Inc.

On 4/20/10, solar...@aol.com solar...@aol.com wrote:

 Allan:

 Things may have changed since we used them (or rather, vice versa).   This
 outfit is certainly ramping up their advertising media dollars.

 My advice would be
 1) Make sure you do not mind having to cancel the credit card you give them
  (you may want to terminate service later);
 2) Get and READ their lead return policy become a speed demon when
 returning leads.

 Along with the occasional solar lead, you may be receiving names of people
 who want to do anything for their home from re-roofing to installing double
  pane windows on the doghouse. And get used to seeing the same contractors
 bidding against you on any of their referrals.  SunPower has recently
 engaged their services on a trial basis but we are loathe to give them a
 credit
 card number.

 The only magic for us was how they made our dollars disappearbut
 things may be different now.  Calfinder is cut from the same cloth - quite
 literally.  If I ever hear anything differently on these people in the
 future,
 I'll let you know.  If you do go ahead with their service, let us  know how
 it goes.

 Patrick A. Redgate
 AMECO Solar, Inc.
 Serving  Solar California
 Since 1974
 7623 Somerset, Blvd.
 Paramount, CA  90723
 562-633-4400


 _www.solarexpert.com_ (http://www.solarexpert.com/)
 _www.amecosolar.com_ (http://www.amecosolar.com/)


  (http://www.positiveenergysolar.com/)



 In a message dated 4/20/2010 10:50:31 A.M. Pacific Daylight Time,
 r...@solarray.com writes:

 Once you  sign up, they start charging you, even for bogus leads. You never
 get your  money back, just credit (if you're lucky) to get more bogus
 leads.
 Also, they waste a lot of your time with different sales reps calling  you,
 but never talking to each other, their internal communication is  zilch.
 Here's a quick breakdown of our experience:


 cash out of pocket:  around $40
 time talking to reps, paperwork:   20hrs
 Leads generated: a Renter wanting more information onthat solar  stuff,
 who was about an hour away.
 Aggravation in dealing with a company that really seems to be
 unscrupulous:
 Priceless.


 I was already suspicious before the first lead, but decided to  see.
 As soon as I saw they had zero filtering of the leads, I  immediately moved
 to dump them, which took weeks, BTW.




 R. Walters
 _...@solarray.com_ (mailto:r...@solarray.com)
 Solar Engineer








 On Apr 19, 2010, at 8:50 PM, Allan Sindelar wrote:


 Wrenches,
 There was a thread last  year about Service Magic's lead generation
 service. At that time, the  strongest message I heard was not to let them
 in,
 because their leads are  seldom good and you can't get rid of them. I don't
 think that I recall a  single positive review of them on this list.

 Has anything changed  since then? What's the current story, please?
 Thanks,
 Allan

 --
 _xm

 Allan Sindelar
 al...@positiveenergysolar.com_ (mailto:al...@positiveenergysolar.com)
 NABCEP Certified  Photovoltaic Installer
 EE98J Journeyman Electrician
 Positive  Energy, Inc.
 3201 Calle Marie
 Santa Fe, New Mexico 87507
 505  424-1112
 _www.positiveenergysolar.com_ (http://www.positiveenergysolar.com/)











-- 
Sent from my mobile device

Don't get me wrong: I love nuclear energy! It's just that I prefer
fusion to fission. And it just so happens that there's an enormous
fusion reactor safely banked a few million miles from us. It delivers
more than we could ever use in just about 8 minutes. And it's
wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] AC Coupled Issues

[Andrew Truitt]

Jeff - We have a number of systems with exactly that configuration and we
haven't had any issues.  However, we have not installed the XW/SB
combination since Xantrex (Schneider?) rolled out the firmware that
incorporates the high battery frequency shift to shut down the solar
inverter(s).  We switched to the Sunny Island for a time but are now going
back to the XW/SB configuration because of the issues you mentioned as well
as the lack of a bypass switch on the Sunny Island.  I think we have an
XW/SB system upcoming so I will get back to you if we have any issues.
Could your problem have something to do with the ironius, self-clearing GFCI
faults that have plagued Sunny Boys recently?


Regarding your next post on utility disconnects for AC coupled systems, we
install the disco between the solar and the critical loads panel.  I was not
aware that the XW (or the Sunny Island) could be re-programmed to send power
out the AC input terminals.  I guess I should investigate that...


Enjoy this beautiful weekend!



Andrew Truitt
Standard Solar Inc.




On Sat, Apr 17, 2010 at 8:41 AM, Jeff Yago jry...@netscape.com wrote:

 As mentioned before, many of our clients want battery backup with their
 solar, but are not off-grid.  They also want a generator so battery banks
 can be down-sized.   For many of these applications we use a SunnyBoy at the
 array when the aray is located hundreds of feet from house, and usually a
 Xantrex battery based inverter at the house, and backfeed the solar inverter
 into the inverter's emergency loads panel.  We pass this backfeed through a
 heavy duty relay controlled to open on high battery voltage. Yes, SunnyBoy
 with SunnyIsland is better match, but since one is 120 V and the other is
 240V that means adding transformers or using two SunnyIslands.

 Here is the issue - The SunnyBoy is working perfectly when grid power is
 passing back to it through the backfeed connection.  However, when this
 system operating off-grid when the grid is lost, the SunnyBoy sees the
 fake grid power coming from the Xantrex which it shows on L1 and L2
 readings, but it is staying in the waiting mode and will not connect.  No
 errors, just acts like grid a morning startup and stays that way.   I have
 had problems before with Fronius doing this and they have provided secret
 codes to open up the program settings for the grid which solves the problem
 when grid power is poor quality typical at end of line.  Is this solution
 possible with SunnyBoy inverters, or is there something else going on.  Have
 not had this problem on other AC coupled systems using the same combination
 of inverters.

 Thanks,

 Jeff Yago

 _
 Netscape.  Just the Net You Need.
 ___
 List sponsored by Home Power magazine

 List Address: RE-wrenches@lists.re-wrenches.org

 Options  settings:
 http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

 List-Archive:
 http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

 List rules  etiquette:
 www.re-wrenches.org/etiquette.htm

 Check out participant bios:
 www.members.re-wrenches.org




-- 
Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!

~William McDonough
___
List sponsored by Home Power magazine

List Address: RE-wrenches@lists.re-wrenches.org

Options  settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules  etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org

Re: [RE-wrenches] Grid-tie Sunny Island

[Andrew Truitt]

Regarding the DC disco issue, we have identified the 3-pole, 600Vdc rated,
200A Crouse-Hinds CH364R (
http://www.crouse-hinds.com/crousehinds/newproducts/relatedinfo/Solar%20Combiner%20Brochure%20110309.pdf)
as a replacement for the Square D version.  Its a little pricey but it looks
like the best available option these days.  We are also looking at the
SolarBOS disconnecting combiners - does anyone have any experience with
them?


Andrew Truitt
Standard Solar Inc.




On Wed, Apr 14, 2010 at 3:07 AM, Philip Boutelle philboute...@gmail.comwrote:

 Kirpal and Wrenches,

 Can you describe your battery setup with the four Sunny Islands? SMA
 recommends using two parallel 1/0 conductors to each SI DC disconnect, for
 three reasons: wire fill limitations with the 1.5 knockouts they provide,
 ease of landing in the breaker, and because the 125A breaker is
 double-barreled and rated for 125A on each leg with the current flow not
 necessarily symmetric, so you need a rating of approx. 200A on the parallel
 conductors (I'm quoting Martin and Antonio at SMA here, this detail is not
 in the manual but what they recommended to me as best practice. The manual
 at one point lists 2 x 1AWG for the DC connections, nothing further).

 With four SIs, that's eight positive and eight negative 1/0 conductors to
 be bussed from the battery bank, or at least to the SIs. I have a similar
 project coming up and am looking at a custom fuse/bus block from Deltec
 http://www.deltecco.com/to arrange/distribute those wires, but would
 love to hear other ideas and experiences on how to go from a single string
 of 48V batteries, through a fused DC disconnect, and then land in the 4 SIs.


 The fused DC disconnect is also an issue; with 20kW of rated continuous
 power at a worst-case of 41V (numbers from the spec sheets), that's 487A
 *1.25 = 610A. I could break that up into four parallel conductors, enabling
 me to use a 4-pole 200A disconnect w/ 175A fuses (space is an issue on the
 mechanical wall). But do I need to pass the DC conductors through two
 switches on the disconnect to maintain the DC rating on the switch? And if
 so, should I instead use a 4-pole 400A disco with 350A fuses and double
 pass-through on the two positive conductors connecting to the battery bank?
 Or ?

 Phil Boutelle

 Project Engineer
 NABCEP Certified Solar PV Installer TM
 Real Goods Solar, Inc.

 831.477.0943 office
 831.359.5268 mobile

 831.477.0944 fax
 www.RealGoodsSolar.com http://www.iesolar.com/



 On Sun, Apr 11, 2010 at 7:44 PM, Kirpal Khalsa solarwo...@gmail.comwrote:

 Davethis is exactly what the sunny island is capable of.supply the
 house panel from the sunny island output, and the main panel in the barn to
 the input side, the house panel will run full time via the sunny islands,
 install a MANUAL transfer switch for times when the sunny islands may need
 to be turned off or removed for maintenance, I can't remember all the
 parameters of the programable relays in the sunny island but more than
 likely one of them is a warning, possibly to notify of no AC source.   also
 you can pass power thru the relays in the sunny islands so no external relay
 is required.the beautiful thing about the sunny island/sunny boy set up
 is you actually are able to get a full multi stage charge process on your
 batteries during a power outage unlike most other AC coupled combinations
 which are simply a charge or no charge, taper not included.
 there are 2 programmable relays on each sunny island so in a dual inverter
 system you still have other relays available for other things like battery
 room fan control, or gen start.
 we have a similar system to yours up and running using  4 sunny islands
 and 4 sunny boys, flawlessly so far..
 good luck..
 For technical help or advice for your system I strongly recommend talking
 to Tucker in the service department over at SMA...he knows the ac
 coupling set up, and system commissioning steps really well and will be able
 to make your job easy.

 --
 Sunny Regards,
 Kirpal Khalsa

 NABCEP Certified Solar PV Installer
 Renewable Energy Systems
 www.oregonsolarworks.com
 541-218-0201 m
 541-592-3958 o


 2010/4/11 Richard L Ratico richard.l.rat...@valley.net

 Hi Dave,

 Depending on the house loads, you might very well do without an
 additional (very
 expensive) auto transfer switch. The inverters, of course, already have
 one.
 Just leave the Sunny Islands connected 24/7.  The transfer from grid to
 battery
 is then milliseconds and flawless. The 56 amps continuous, and deep SI
 surge
 capacity will most likely, comfortably, handle the whole shebang. I've
 got a
 single SI5048 doing this now through a transformer. Works great.

 Put a manual transfer switch at the barn in the event there's ever a
 problem
 with the SI's. But, Iota makes a 100 Amp auto transfer switch, if you
 decide
 you've got to have one. It is attractively priced compared to anything
 else I
 could find. Beware