Re: [RE-wrenches] Racking on residential rooftops

[AE Solar via RE-wrenches]

We also never had luck with a laser, although early on that is something we
definitely tried. We use a string line. We keep drops of 2x4 that are cut
to the length of our most common panel sizes, and fasten them on to the
rails with mid clips. That way we can easily reference where the top and
bottom of the row will end up.

The installers can choose to run their stringline on the top of the 2x4 or
on the bottom (depending on the logistics of that particular row). Its good
to double check the string line in reference to the ridge, shingle line  or
drip line in various places before installing.

Then they set the second panel in the row and work their way down. Once the
row is complete the 2x4s and string line are dropped, the rails are cut to
length (we run them wild originally, and cut them flush at the end) and the
first and last panel are installed

One of our installers worked for a much larger company at some point, and
he said they didn’t use a string at all. Their method was to “keep someone
on the ground who just looked at the row and told them if it seemed like it
was going straight”. Seems like a disaster waiting to happen to me …but
that company has a lot of installs in the area and they look fine.


Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com 
(518) 567-1468



On Fri, Oct 4, 2024 at 2:44 AM William Miller via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Jay:
>
>
>
> Is there a make and model of laser you recommend?  I bought a pretty
> expensive one and it was useless in daylight.
>
>
>
> The goal is to make the rails parallel, not necessarily straight or
> level.  I’m not sure a laser level is the right tool for this goal.
>
>
>
> Running a laser line at other than level or plumb was not that easy when I
> tried it and that seems necessary, so I am looking for hints on your
> process.
>
>
>
> William
>
>
>
> Miller Solar
>
> 17395 Oak Road, Atascadero, CA 93422
>
> 805-438-5600
>
> www.millersolar.com
>
> CA Lic. 773985
>
>
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
> Behalf Of *Jay via RE-wrenches
> *Sent:* Thursday, October 3, 2024 8:39 PM
> *To:* RE-wrenches
> *Cc:* Jay
> *Subject:* Re: [RE-wrenches] Racking on residential rooftops
>
>
>
> Hi Jim
>
>
>
> I recommend a laser level. Can be just a line laser or can be a multi line
> level.
>
> Brightness is key.
>
>
>
> Much easier, faster and accurate than using string.
>
> Also makes it much easier to keep everything straight
>
>
>
> Jay
>
>
>
>
>
>
>
> On Oct 3, 2024, at 7:44 PM, William Miller via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
> 
>
> Good question, Jim.
>
>
>
> We should all want our installations to work good and look good.
>
>
>
> A lot of this consideration is purely aesthetic.  As such, it doesn’t
> always have to be good, it just has to look good. What I mean by that is if
> there are some misalignments that can’t be seen from any vantage point,
> then it is not so critical to spend a lot of time making those perfect.  I
> always look to see what vantage points there are from which a given
> installation can be seen and focus on making the installation look good to
> those vantage points.
>
>
>
> Misaligned panels are only obvious where panel corners and edges meet.
> Your rack may undulate but as long as the panels meet up evenly that
> waviness is not readily visible.  I don’t spend too much time checking a
> roof for flat—none of them are.
>
>
>
> Two adjacent panels bolted to the same pair of rails almost always line
> up.  The bigger problem occurs when you have two or more sets of rails.  If
> the vantage point is from below and the upper set of rails is even slightly
> higher than the lower set of rails, that protruding upper panel edge can
> easily be seen.  If, however, the upper set of rails is slightly lower, it
> is less obvious.
>
>
>
> The key is to run a string line along the view axis to check to see of the
> pairs of rails are in alignment.  Make the string as tight as possible.  I
> space my string off the rail by a set amount—usually the thickness of a
> strut washer—and take another strut washer and slip it under the string at
> various locations.  The reason to space the string above is to prevent the
> rail from subtly deflecting the string without you noticing it happening.
> You can also use a spare stick of rail or any long straight edge.
>
>
>
> Lining up rows of panels is most critical if the installation can be
> viewed from the side.  If the alignment gets bad at first without
> correcting it the error can quickly compound.  The longer the row the worse
> it can get.
>
>
>
> We set the first panel carefully and then take a length of rail and bolt
> it across the other end to hold a string line.  Pick a reference point,
> usually the eave edge of the roofing—or any other straight line the eye
> might automatically compare the row of panels to—and 

Re: [RE-wrenches] DC fan for greenhouse

[AE Solar via RE-wrenches]

We had used some Snap-Fans many many years ago on some greenhouse
applications. Looks like they are still in business and their product line
has expanded so that says something….
http://www.snap-fan.com/


Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com 
(518) 567-1468



On Tue, Jul 9, 2024 at 9:36 AM David Palumbo via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Wrenchters,
>
> I have a friend looking for a DC fan for his 20' x 40' greenhouse here in
> northern Vermont.
>
> Recommendations please.
>
> Thanks,
>
> Dave Palumbo
> Hyde Park, VT
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[RE-wrenches] IRA Domestic Content Bonus Credit

[AE Solar via RE-wrenches]

Wrenches,
I'm wondering if any of you have thoughts/experience with the additional
10% ITC that the Inflation Reduction Act allocates for "domestic content".
I'm doing some googling but not really sure what equipment (racking,
panels, inverters, BOM, etc) we would need to install in order to qualify
for this, and what the parameters are to qualify something as 'domestic
content'. If anyone has rough thoughts or information sources to share I'm
all ears...
Adam

Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com 
(518) 567-1468
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Re: [RE-wrenches] Ironridge ballasted BX on the ground

[AE Solar via RE-wrenches]

Are helical piles overkill for what you are trying to do? They can be
unscrewed when you are done so nothing is left behind.

Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com 
(518) 567-1468



On Tue, Apr 9, 2024 at 4:17 PM Nick A Lucchese via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Greetings Wrenches,
>
> Has anyone utilized any ballasted style commercial roof rack solutions
> directly on the ground? I have an upcoming project that is only predicted
> to be left in place for around 5 years and is on land expected to be put
> back as it was found therefore concrete is out of the question. I’ve
> successfully made temporary arrays with standard rails and tilts by pinning
> 2x wood material to grade but this one calls for something lower in
> profile. Very minimal use is expected during winter months so the lower
> production of a 10 degree tilt is not an issue. The Ironridge BX seems like
> it would be ideal and have been told at conferences and distributor shows
> that it would work but figure one of you may have experience with this
> product or something more appropriate and affordable? Perhaps even go for
> the bonus of something with a 15 degree tilt if it exists? I realize weeds
> and grasses will be a factor as well but client can come up with many low
> tech solutions for that aspect. The grade is quite flat, few rocks and site
> prep can certainly improve even more before the project begins.
>
> Thanks for the wisdom and experience, Nick
>
>
>
>
>
>
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Re: [RE-wrenches] USDA Rural Development fund

[AE Solar via RE-wrenches]

We were able to access that a few years ago for a brewery project and were
granted the money. I used a grant writer who works with solar companies
specifically on accessing that funding. Their intake online walked you
through what you may or may not be eligible for.  They were great to work
with and I felt the price was worth it. I could dig up their contact info
if that’s of interest.

On Tue, Jan 9, 2024 at 11:57 AM Christopher Warfel via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Hi Daniel, it is a lot of paperwork, but if they pay you for your time,
> and they should, I think it is worth it.  Importantly, you need to speak
> with the regional office administering this fund and make sure you know
> what they are requiring. Some of them use a subcontractor to help, but you
> do NOT need to work with the sub. I had a very bad experience with one of
> them in New England who was not very knowledgeable about the technology,
> and was impossible to work with.
>
> I do know of a lot of oyster farms here who I turned on to this and used
> it to power their processing facilities.
>
>
> Chris
>
>
> On 1/3/2024 12:28 PM, Dana Orzel via RE-wrenches wrote:
>
> Hey all! A happy, Safe & Prosperous New Year to You All!
>
>
>
> I have a brewery that is wanting to do a grid tie system - 2 meters; 1 is
> split phase & 1 is 3 phase & the initial request was about USDA Rural
> Development funding.
>
> I have no experience with this.
>
> Any suggestions?
>
> Has anyone applied for this?
>
> Experience?
>
> I have heard it is a pile of paperwork to say the least.
>
>
>
> Thanks
>
>
>
> _
>
> Dana OrzelGREAT SOLAR WORKS!
>
> C – 208.721.7003  E – d...@solarwork.com
>
> W - www. greatsolarworks.com www.solarwork.com
>
> *“Responsible Technologies for Responsible People since 1988!”*
>
>
>
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> --
>  Christopher Warfel
>  ENTECH Engineering, Inc.
> PO Box 871, Block Island, RI 02807
> 401-466-8978
> 
>
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Re: [RE-wrenches] SMA String inverters

[AE Solar via RE-wrenches]

We haven’t used the -41s for just over a year, because they aren’t UL1741SB
compliant (which became required here in NY last January). Additionally,
the last time we did use the -41s we discovered (upon receiving the units)
that they weren’t WiFi compatible anymore (due to some parts shortages) and
that the inverters had to be hardwired in order to access monitoring.  The
new inverter line that shows up on the SMA website is UL1741SB compliant,
but the last time I checked with my distributor (a few weeks ago) they
still weren’t able to get access to them.

On Mon, Jan 8, 2024 at 4:44 PM Jeremy Rodriguez via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> What are you wrenches that used to install the SB-41 units sourcing
> now? Looks like there is a new model on their website
>
>
> Jeremy Rodriguez
> Solar Installation / Design
> All Solar, Inc.
> 1453 M St.
> Penrose Colorado 81240
>
> Sent by Jeremy's iPhone. Sorry for typos and shorthand.
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[RE-wrenches] Enphase Gateway causing lamp to flicker

[AE Solar via RE-wrenches]

Wrenches
We have a project where the homeowner has some of those bedside lamps where
you touch them to turn them on/off/dim (rather than having a switch). It
seems like when the Enphase Gateway is powered up it causes the lights to
freak out. Once we flip the breaker to the Gateway off the lamp operates as
normalZ Interestingly, with another load (homeowner was using a
dehumidifier) plugged into the circuit it seems to stabilize the lights. We
isolated the problem to the Gateway specifically (ie having PV breakers
on/off doesn’t make a difference). It’s a supply side connection. The house
is small but we tried the lamp in multiple parts of the house and it
happens everywhere.  Enphase doesn’t have any ideas. Anyone have this
happen to them?

I think we might just need to buy them some new lamps, but I’m also
interested to understand what is happening. These are just some cheap
lamps, but wondering if other household loads that are more sensitive might
be affected as well?

Adam
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[RE-wrenches] APSystems Micros

[AE Solar via RE-wrenches]

Wrenches
Anyone have experience/thoughts on the APSystems 2:1 single phase micros. I
don’t see much in the archives and the internet has some mixed reviews. I’m
mostly on the Enphase band wagon, but interested in knowing if APS could be
considered as a more cost efficient option for larger single phase projects…
Adam
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Re: [RE-wrenches] Fronius USA available 2023 & 2024 ?

[AE Solar via RE-wrenches]

I was trying to expand on an older fronius install and asked my greentech
rep about when they might have their UL1741SB line out and he said he
“hadn’t heard from fronius in a while and wouldn’t be surprised if fronius
wasn’t a company in a year or two”. So more or less the same info you heard
Mick

On Thu, Aug 24, 2023 at 5:42 PM pieter offgridenterprises.org via
RE-wrenches  wrote:

> Fronius is certainly having issues, many of their products are out of
> stock. We are eight weeks into trying to resolve a service issue, and
> cannot get parts. Historically this sort of problem would have been
> resolved in less than one week. I suggest that looking at an alternative
> would be advisable. If this downward trend continues with Fronius, support
> after the sale will be a problem for the installer and the customer. I am
> having good experiences with other manufacturers but have not used any of
> them in an AC bussed configuration, so for that reason I will not suggest
> an alternate brand.
>
> Pieter Huebner
>
> Project Manager
>
> Off grid Enterprises
>
>
>
> *From:* RE-wrenches  *On
> Behalf Of *Mick Abraham via RE-wrenches
> *Sent:* Thursday, August 24, 2023 3:23 PM
> *To:* RE-wrenches 
> *Cc:* Mick Abraham 
> *Subject:* [RE-wrenches] Fronius USA available 2023 & 2024 ?
>
>
>
> Hi, Mechanix~ I asked a Greentech location about quantity four Fronius
> string inverter PRIMO 6.0-1. (6kW AC output, single phase 240 volt 60 hz)
> This p/n is in the Greentech portal but my particular branch hasn't done
> much with Fronius. Today the branch manager told me "Fronius no longer
> exists."
>
>
>
> Can any of you confirm or correct this report? I have an off-grid
> opportunity for which I wish to AC couple some of the PV. If Fronius USA
> has indeed "left the building", are there other string inverters that can
> be selected for country code "off grid 60 hz"? I'd like for the PV
> inverters to only curtail their output wattage if there's a frequency shift
> from the grid forming inverter (frequency/watt). Schneider XW Pro units
> would be forming the grid. Schneider has a white paper # 990-6421 on AC
> coupling but this document is almost three years old & no help at all in
> finding compatible PV inverters. Rapid shutdown is not mandated for this
> gig & each array would be evenly illuminated. IIRC, the List hasn't been
> highly enamored with SolarEdge in recent years; is that still the consensus?
>
>
>
> Thanks as always; the Wrench List is the Bomb!
>
>
> Mick Abraham, Proprietor
> www.abrahamsolar.com
>
> Landline: 970-731-4675
>
> Cell phone or for text messaging: 970-946-6584
>
> ᐧ
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> --
Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com 
(518) 567-1468
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[RE-wrenches] SMA Tech Support

[AE Solar via RE-wrenches]

Hey all,
After the typical 1 hour wait to get up to Level 2 for SMA tech support,
the tech mentioned there might be some option where you get registered (or
possibly pay) to bypass Level 1? Or somehow get more streamlined service?
He didn't know how or where to access that service. Has anyone heard of
this and/or utilized it? Forever frustrated with their wait times. Thanks
for any feedback.
Adam


Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com 
(518) 567-1468
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Re: [RE-wrenches] Bonding Metal Roofs Part II

[AE Solar via RE-wrenches]

Dave,
Interested to hear how you all are complying with NYSERDA on bonding in the
3' perimeter outside of the array. Their QA team just points me towards the
Illsco SGB-4 lugs, but sometimes there is no graceful way for us to install
them. If we can't get easy access under a ridge cap to hide/protect the
lugs, then the only other solution seems to be Michael's idea of running
lugs/bare copper on the seams outside of the array perimeter (which
sometimes includes whole other adjacent roof sections). Aside from being
aesthetically unpleasant, I'm also skeptical that ice and snow won't grab
onto the copper and tear the lugs off eventually...
Adam

Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com <http://www.autonomousenergies.com>
(518) 567-1468




On Thu, Jun 8, 2023 at 2:33 PM Dave Tedeyan via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Also being in NYS, I have been familiar with this requirement for a long
> time. I believe the idea is that just like how any metal part in a system
> needs to be grounded, metal roof panels under solar panels are kind of part
> of the system. What if a wire comes loose and touches the roof? You would
> not want someone going up there to get zapped. I see the point that the
> worst you can do with RSD is 80V. But in NY at least, you cant really argue
> with NYSERDA if they decide they want this. I have never come across a
> building or electrical inspector here that would care about this, but
> NYSERDA does and that is where the incentive money comes from...
>
>
>
> On Tue, Jun 6, 2023 at 2:34 PM Jay via RE-wrenches <
> re-wrenches@lists.re-wrenches.org> wrote:
>
>> But isn’t the whole concept of RS to prevent the energizing of say a
>> metal roof?
>>
>> The inverter sees a ground fault or ark fault. Trips off line, the RS
>> activate and now it’s less than 80v. Isn’t that what it’s supposed to do?
>>
>> What is the purpose of grounding the metal roof?
>>
>> Jay
>>
>> On Jun 6, 2023, at 10:09 AM, Glenn Burt via RE-wrenches <
>> re-wrenches@lists.re-wrenches.org> wrote:
>>
>> 
>> If I am not mistaken, this derives from some UL testing that showed that
>> a metal roof may become energized during a thermal event.
>>
>> I suppose no less important than our RSD requirements...
>>
>> -Glenn
>> Sent from my 'smart'phone, so please excuse typos and spelling errors.
>>
>> -- Original message--
>> *From: *Jason Szumlanski via RE-wrenches
>> *Date: *Tue, Jun 6, 2023 10:25 AM
>> *To: *offgridso...@sti.net;RE-wrenches;
>> *Cc: *Jason Szumlanski;
>> *Subject:*Re: [RE-wrenches] Bonding Metal Roofs Part II
>>
>> I'm watching this thread with interest. Is anyone aware of any serious
>> injury or property damage caused by an energized metal roof, and if so,
>> what were the circumstances? Is bonding metal roofs a solution looking for
>> a problem?
>>
>> In response to the ground mount alternative, that isn't really an option
>> in many areas of Florida where the cost can be 50% higher or more to ground
>> mount if it's even practical due to flood level. Tile and shingle roofs in
>> Southwest Florida are being switched to metal at shocking rates in the wake
>> of Hurricane Ian, and we love it from an installer's standpoint.
>> Fortunately, I haven't run into any bonding inspection issues for over 10
>> years here.
>>
>> Jason Szumlanski
>> Principal Solar Designer | Florida Solar Design Group
>> NABCEP Certified Solar Professional (PVIP)
>> Florida State Certified Solar Contractor CVC56956
>>
>>
>> On Mon, Jun 5, 2023 at 8:28 PM Dave Angelini Offgrid Solar via
>> RE-wrenches  wrote:
>>
>>> Hey Adam,
>>>
>>> Creative solution #1  Do not install solar on any roof if you can ground
>>> mount it.
>>>
>>> Is this He Adam or the Him Adam?
>>>
>>>
>>>
>>> *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 <209%20813%200060>*
>>>
>>>
>>> On 2023-06-05 3:47 pm, AE Solar via RE-wrenches wrote:
>>>
>>> Hey all,
>>> I had started a thread about bonding to metal roofs in 2018 but can't
>>> figure out how to respond via the archive. I know some things have changed
>>> since then, so I'm circling back and starting a new thread.
>>>
&g

[RE-wrenches] Bonding Metal Roofs Part II

[AE Solar via RE-wrenches]

Hey all,
I had started a thread about bonding to metal roofs in 2018 but can't
figure out how to respond via the archive. I know some things have changed
since then, so I'm circling back and starting a new thread.

In NY one of our inspection agencies (NYSERDA) requires bonding of metal
roof panels below the array, as well as within a 3' perimeter of the array.
S-5! in combination with Ironridge is now listed to bond the roof under the
array (so long as you hit every pan with an attachment) but this doesn't
solve the problem of trying to bond within the 3' perimeter. For installs
where we are only 18" from the ridge, this means we are required to bond
the adjacent roof as well.

Whenever possible we install Illsco SGB-4 lugs under the ridge cap. But
more and more we're finding roofs where the ridge cap feels inaccessible,
tricky, or where we simply don't want to get into roof warranty issues
associated with opening up a prior contractor's work.

Wondering if anyone else is coming up against this and what some possible
creative solutions might be. I don't want to walk away from potential
projects but...

As always, thanks for any thoughts
Adam


Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com 
(518) 567-1468
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[RE-wrenches] Sunlight Backup

[AE Solar via RE-wrenches]

Wrenches,
Interested to hear if anyone has been using Sunlight Backup, and if so, how
the experience has been (for you as well as for your clients). Thanks
Adam

Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com 
(518) 567-1468
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Re: [RE-wrenches] Solar Roof Jack

[AE Solar via RE-wrenches]

We just used a few of these recently. Seemed easy enough and plan on using
more on an upcoming project. We had easy access to the vent in the attic
which probably helped. Only complaint was that I was worried about the vent
cap (provided) blowing off and eventually having debris get in there and
get stuck in the horizontal run on the roof. I’m not a plumber though…so
maybe I’m over thinking it. We put a screw into the cap just in case

On Thu, May 12, 2022 at 7:33 AM Jason Szumlanski via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Has anyone used this product? I'm looking for feedback on installation
> ease and your impressions.
>
> Jason Szumlanski
> Florida Solar Design Group
> ___
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> --
Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com 
(518) 567-1468
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Re: [RE-wrenches] Monitoring on Remote Sites

[AE Solar]

Hey all,

Thanks for all the good info and sorry for the slow reply. I meant to
mention in the first post that line of sight is an issue. It’s probably a
quarter mile (maybe less) through forested terrain to the nearest building
on the property that has WiFi. There is also a decent elevation change (the
array is uphill from the building…maybe 40’ of difference in elevation?)



To answer Sam’s questions, we could put AC at each inverter if that needed
to happen.  Maybe since line of sight is an issue, Glenn’s suggestion of
looking into a Yagi antenna is best place to start?

Adam


Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com 
(518) 567-1468




On Mon, Mar 14, 2022 at 6:00 PM Foxfire Energy 
wrote:

> We’ve had success with Wilson amplifiers and a cell phone modem hotspot
>
> Sent from my iPhone
>
> On Mar 14, 2022, at 5:58 PM, Sam Haraldson 
> wrote:
>
> 
> Adam,
>
> What kind of distance between the inverters and the existing internet
> connection?  Is there line of sight between the two?  Is there an
> electrical panel at the inverters that would allow you to install a low
> amperage AC circuit for powering comms devices?  Folks have made some good
> suggestions so far regarding building wireless bridges or using a
> directional (yagi) antenna to beam a wireless but depending on distance and
> line of sight these options may not be possible.  I have successfully
> installed both of these options but the devil is in the details as to
> whether it will work.
> Sam Haraldson 
> Installation & Service Manager
> 
>
>
> | o. (406) 551-6135
> 
> 
> 
> 
>
> 
>
>>
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[RE-wrenches] Monitoring on Remote Sites

[AE Solar]

Wrenchers,
We have a project on a large property, where the install site has no
internet (there is internet much further away on the property, and on a
different service) and cell reception is pretty bad. We attempted to use
SMA Cell Modem Kits (sunny boy inverters), but couldn't get a good enough
signal for them to work. The client was fine with having just a production
meter with no internet based monitoring. Now there is the possibility of
expanding the system quite a bit (also with Sunny Boy's), and I'd prefer to
figure out a way to monitor everything from offsite. Has anyone had
any success using a third party antenna with the SMA Cell Modem Kits? Or
have thoughts on other methods for setting up monitoring where we could, at
a minimum, see the combined output of all the inverters? Thanks for any
thoughts.
Adam

Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com 
(518) 567-1468
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Re: [RE-wrenches] Key for SMA rapid shutdown controller

[AE Solar]

I thought someone at SMA told me once that it was a generic key made by
Eaton(?) and could be picked up from any distributor?

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468



On Tue, Dec 14, 2021 at 9:02 PM Jason Szumlanski <
ja...@floridasolardesigngroup.com> wrote:

> Just today I warned someone to make sure never to lose it. I suggested
> securing it nearby with a cable. I'd like to know as well where to get one
> if needed.
>
> Jason
>
>
>
> On Tue, Dec 14, 2021, 8:57 PM Dave Tedeyan 
> wrote:
>
>> Hi all,
>> Does anyone have a source to get a replacement key for SMA's rapid
>> shutdown controller. I have someone who lost their key at some point, and
>> then for some reason initiated rapid shutdown. I have a spare to unlock it,
>> but I am wondering if it is possible to get one without getting the whole
>> controller.
>> Thanks!
>> -Dave
>>
>> --
>> [image: Logo] 
>> Dave Tedeyan, P.E.
>> Owner | Sungineer Solar
>> p: he | him | his
>> a: 1653 Slaterville Rd. | Ithaca, NY 14850
>> w: www.sungineersolar.com 
>> c: (607) 288-2898
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[RE-wrenches] Pitch Pockets

[AE Solar]

Anyone have a favorite pitch pocket they use for flat roofs? We have a
larger residential system with an EPDM flat roof (decking, 2" of rigid
insulation, then EPDM). We are trying to keep the array as low to the roof
as possible. We've used Chemlink E-Curbs to seal around stand-off's in the
past, but figured I'd reach out and see if there are any other
products folks like?
Thanks.
Adam

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] Strange noises from the roof

[AE Solar]

Jason,

We had a similar situation with a SnapNRack UR-40 system. Homeowner said
everyone once and a while they would hear a sound like "an acorn hitting
the roof". It was pretty sporadic, but at least a few times a day. Install
happened in late fall when there can be decent temperature changes
throughout the day. Also, it was a cathedral ceiling below the install, so
it's possible the sound was amplified by that (rather than being dampened
by an attic).

All racking was installed as per SNR's specifications with gaps in the rail
splices for expansion etc. Short edge of the panels were spaced so that
they didn't touch each other. Talked with SNR and they didn't have any
ideas. The install happened directly after some other work was completed on
that roof section (cellulose insulation was blown in, new shingles, some
new decking in places, drywall, etc) so couldn't be sure in the end if it
was related to us or somehow related to any of the other work that had
happened (although they didn't notice it until the panels went up). The
engineer said maybe there was just some settling in the house due to all
the work. Doesn't sound like it was nearly as extreme as your situation
though, and we never figured out exactly what it was.

Adam

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468



On Tue, Oct 19, 2021 at 4:04 PM Jason Szumlanski <
ja...@floridasolardesigngroup.com> wrote:

> Someone reached out to me who had a PV system installed two years ago by
> another contractor on her shingle roof. Almost immediately it started
> having loud popping noises intermittently, but pretty consistently day to
> day. The homeowner thought it sounded like expansion and contraction. That
> made sense, so the original contractor came back multiple times to tighten
> things up. The problem never went away and lasted about 6 months until it
> was driving her crazy and she had the panels only removed. The sounds
> stopped. Legal proceedings ensued. Everything was dropped and she now has
> rails up, panels in garage, and no clamps.
>
> The panels have been in her garage for 18 months. I went to inspect today.
> She has Quickmount LMount flashings, Ironridge XR100 rails and had UFOs.
> The UFOs were tightened so much that they were tearing the t-bolts out of
> the top channel of the rail. I don't know if that was from the original
> installation or after they came back to try to resolve the issue. The UFOs
> had also dug in pretty deeply to the top of the module frames. None of the
> glass was broken.
>
> I could not find much evidence of module frames slipping on the rails and
> causing marks. The flashings and L-feet are all properly installed in
> trusses at 48 or 24-in centers. The square bolts securing the L-feet to
> rails are all tight and show no evidence of slippage. The attic looks
> great. 5/8 ply over manufactured trusses (southern pine). It's a Gable roof
> with about 20 feet eave to ridge. Again, everything looks great in the
> attic.
>
> There are two rows of panels. I thought maybe the two rows were rubbing on
> each other. But I could not find any evidence on the short sides of the
> modules that would suggest this was the problem.
>
> Has anyone seen this issue before? I'm thinking about putting a few test
> panels back up with standard mid clamps rather than UFOs just to see if
> that changes anything.
>
> Jason Szumlanski
> Florida Solar Design Group
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[RE-wrenches] Buchanan Crimps in Outdoor Boxes

[AE Solar]

Wrenchers,
Some point back we transitioned from polaris lugs to buchanan crimps/caps
(doping our wires in noalox) for our jbox splices. I know there have been a
few conversations on here about this. Seems like a much more robust
connection than anything we have used prior. But now we have an inspector
who isn't in support of using them for outdoor/damp locations. To be fair
(although it seems like a far superior connection) Ideal doesn't have
documentation to support outdoor use. I know a lot of folks on here have
had solid/long lasting results though. In any event, we may have to
transition away from buchanan crimps and wondering what you all recommend
as your second (or first) choice? Or if anyone has experience with
supporting this application when dealing with inspectors? Do we go back to
polaris lugs? I know there was a conversation a while back about failures
with those...
Thanks for any thoughts.
Adam

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] custom DC disconnect sought

[AE Solar]

DC Sunvolt doesn’t show anything like that on their website but years ago
we used to by stuff from them and I think I remember that they can make
discos to your specs ?
https://shop.dcsunvolt.com/Small-DC-Disconnects_c4.htm?page=2


On Fri, Aug 6, 2021 at 2:43 PM Marco Mangelsdorf 
wrote:

> Aloha Wrenches and aloha happy Friday.
>
>
>
> I’m on the hunt for a U.L./ETL-affiliated shop that does custom
> disconnects.  In this case a 12-circuit switching both poles in a NEMA3 or
> 4 non-metallic enclosure.
>
>
>
> Any suggestions (other than SolarBOS whom I’ve already left a message for)
> where to go for such a bugger?
>
>
>
> mahalo,
>
> marco
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Re: [RE-wrenches] looking for a glass-on-glass, frameless module; bifacial preferred but not essential

[AE Solar]

Scot,
We have used Prism Solar for glass on glass pergolas. Not sure if the price
is any better than Lumos. Im not totally in love with the custom racking
option that they pointed us towards though...if you go that route give a
shout for what we learned installing it...
AK
Www.prismsolar.com

On Tue, Jan 5, 2021 at 3:33 PM  wrote:

> Good day, wrenches:
>
>
>
> Seeking any insight on a module that fits my needs.
>
>
>
> We used to use Sunpreme glass on glass frameless but they went under with
> little fanfare (and after winning a significant manufacturing award kind of
> like Solyndra but smaller…).
>
>
>
> We use there on our solar pergolas. WE have used framed modules but it
> just looks horrible.
>
>
>
> Does anybody know of anyone but Lumos is making this product (their LSX is
> frameless)? Lumos is beautiful but hard to make work in low-electricity
> cost Texas.
>
>
>
> Thanks,
>
> Scot Arey, Solar CenTex
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Autonomous Energies
PO Box 1245
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(518) 567-1468
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[RE-wrenches] Bad Diodes in QCells?

[AE Solar]

Wrenchers,
Wondering if anyone has had any experience with bad diodes in QCell panels.
Two of our projects this summer had panels that were putting out half of
their rated voltage. At first it seemed like it was a defect from the
factory, and it was caught upon commissioning the system, but I'm now
seeing that another panel has gone bad about two months after install. I've
spoken with a few distributors and they said they haven't heard anything
about this being a pattern. I'm in the RMA process with QCell, and don't
feel like I'm getting complete transparency from them. So far we have 8
defective panels out of 300. It was in two different projects that were
months apart. I'm not sure if they were from the same shipment or not. All
of them were Q.PEAK DUO 400 watt panels. Interested to know if anyone else
is having similar experiences? Thanks for any thoughts.
Adam

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] Solar Edge...continuous saga of 181/183 hardware failures...moving on to another inverter.

[AE Solar]

interested to know if folks are having issues with specific models or it's
all across the board? if it's all across the board, i (like jay) would be
interested to know what people are moving on towards. especially for
smaller commercial 3phase projects.
adam


On Thu, Jul 23, 2020 at 11:57 AM MiJo Nels 
wrote:

> We also, have found this to be the case. Now I feel like I'm in a bad
> marriage with them. We consistantly wait longer than we are told for
> replacement product, constantly hearing the same repetitious verbiage from
> them "just wait a little longer, we'll be able to control your coffee maker
> with your inverter soon".. or the old "Q1 Q2 Q3" promises for equipment or
> to get thru beta testing.. .. I too. . .  am "Done". . .
>
> Joe Nelson
>
> Project Manager C-46/C-10
> Sustainable Energy Group Inc., A California Corporation
>
> CSL# 868816
> www.SustainableEnergyGroup.com
> 530-273-4422 (Office)
>
> 530-217-8385 (Cell)
>
> 
>
>    
>
>
> --
> *From:* RE-wrenches  on behalf
> of Jay 
> *Sent:* Thursday, July 23, 2020 7:47:31 AM
> *To:* RE-wrenches 
> *Subject:* Re: [RE-wrenches] Solar Edge...continuous saga of 181/183
> hardware failures...moving on to another inverter.
>
> Hi Scot and others
>
> I’ve heard these horror stories about SE
>
> What is the best replacement for SE at this point?
>
> Thanks
>
> Jay
>
>
>
>
>
> On Jul 23, 2020, at 5:57 AM, scot.a...@solarcentex.com wrote:
>
> 
>
> Time has finally come to move on from SolarEdge.
>
>
>
> Now replacing the THIRD inverter for one customer alone that has the
> infamous 181/183 hardware failure error code again.  First one replaced in
> Sept 2019. Second failure and RMA July 6th 2020, and now this third
> failure on that replacement inverter.
>
>
>
> We have had 24 total RMAs at quick count and it is eating into our
> credibility.
>
>
>
> Solar Edge provided a briefing to me about two months ago acknowledging
> that their manufacturing quality control issues bordered on a recall, but
> opted to stay silent and let the installers keep suffering for their
> materiel and design issues. I was advised that the batch of deficient
> inverters and their manufacture time frame meant I just needed to get
> through this summer…perhaps but not another summer ever like this.
>
>
>
> No more. Au revoir, Solar Edge.
>
>
>
> 
>
>
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[RE-wrenches] TS4R-F Feedback

[AE Solar]

Wrenchers,
Does anyone have feedback on using TS4R-F for rapid shutdown? It was a
tough run for us with RMA's on the SMA Rapid Shutdown boxes. We never
messed around with Tigo but have followed threads here, and recently had an
SMA tech tell me "he wouldn't wish it on his worst enemy". Probably going
to give the TS4R-F a shot with some SMA installs but interested to hear any
feedback on product reliability. Thanks for any thoughts.
Adam
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Re: [RE-wrenches] protecting wire below 8'

[AE Solar]

Kirk,
Not sure if this helps but
690.31(A)  “where PV source and output circuits operating at max system
voltages greater than 30v are installed in readily accessible locations,
circuit conductors shall be guarded or installed in a raceway”

It doesn’t mention 8’ but mentions “readily accessible”. We have AHJs that
interpret that as 8’ unless a 6’ fence is installed around the array. I
don’t have a reference for those measurements though...just feedback we
have gotten from inspectors

On Fri, Jul 17, 2020 at 11:38 AM Kirk Herander  wrote:

> All,
> Is there a reference to this so-called "8-foot rule" that someone could
> point me to in the NEC? Thanks.
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(518) 567-1468
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Re: [RE-wrenches] Bi-facial modules

[AE Solar]

We did a small project with Prism two years ago. In the end (3) of our (30)
panels shattered over the course of the first year. Learning curve all
around. Be very careful, the edges are super fragile and a mild impact can
cause the whole panel to shatter (their engineers said that once an
installers wedding ring shattered a panel when he grabbed it!?). Not sure
if that is the case with all bifacials or just theirs. Prism replaced at
least 2 (maybe all 3?) panels for us, but was a pain to extract them from
the array. But, as Andrew mentioned, Tyler and everyone there was super
patient  and helpful through it all.

The custom racking that Prism recommended looked sleek but ultimately I
think it caused us a lot of problems and I probably wouldn’t use it again.

On Tue, Aug 13, 2019 at 6:17 PM Andrew Truitt  wrote:

>
> 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 .  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
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> 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 *
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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Re: [RE-wrenches] 12v solar direct greenhouse fan

[AE Solar]

Maybe try Snap Fan 

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468



On Fri, May 17, 2019 at 8:40 AM David Palumbo  wrote:

> I have an old off grid customer looking for a greenhouse fan, about 20”,
> to run direct off an old 48w 12v module.
>
>
>
> Backwoods is listing DC Super Fans that say battery based and not intended
> to operate direct from solar module.
>
>
>
> Where can we get a fan to fit the bill for PV direct operation?
>
>
>
> Thanks,
>
> Dave Palumbo
>
> Hyde Park, VT
>
>
>
> Sent from Mail  for
> Windows 10
>
>
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Re: [RE-wrenches] SMA WLAN?

[AE Solar]

Either but 5 is preferable.

On Mon, Jan 28, 2019 at 11:18 AM Kirk Herander  wrote:

> What frequency does the Sunnyboy Inverter (SB7.7-US) Wi-Fi use to
> connect-operate on? 2.4 or 5 GHz? Or both? Can’t find the answer anywhere
> in the SMA documentation. Thanks.
>
> Kirk Herander
>
>
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Re: [RE-wrenches] Bi-Directional / Netmetering question

[AE Solar]

The Enphase CTs are directional. There is an arrow on them. I believe it’s
supposed to point towards the load side for both consumption and production
but not positive off the top of my head.

On Wed, Aug 15, 2018 at 7:10 PM Kirpal  wrote:

> Jason...not sure about the Enphase consumption monitoring, if it is done
> with CT's confirm that your CT's are facing the right direction.  Some CT's
> are directional and perhaps your consumption monitoring could be backwards
> instead of the utility meter wiring backwards.Seems like the utility
> would have noticed incorrect wiring in their can.
> We use the E Gauge CT clamps for some monitoring and they are
> directional.  I am not familiar with the Enphase versions.
>
>
> Sunny Regards,
> Kirpal Khalsa
> Oregon LRT#25
> NABCEP Certified PV Installation Professional
> Oregon Solarworks LLC
> www.oregonsolarworks.com
> 541-299-0402
>
> On Wed, Aug 15, 2018 at 4:01 PM, Jason Szumlanski <
> ja...@floridasolardesigngroup.com> wrote:
>
>> Is it possible for a utility meter to be programmed/wired backward? I
>> have a client on an Enphase system with production and consumption
>> monitoring, and the Enphase monitoring is showing solar production exceeded
>> consumption by 400 kWh for a billing period. However, the meter is reading
>> almost exactly the opposite. It seems too coincidental.
>>
>> I'm going to go out to the site tomorrow to shut down all of the loads
>> and see what happens when solar is only backfeeding the meter, but I'm
>> curious how the meters are "programmed" or set up to work.
>>
>> Note that the meter was zeroed to start and the initial billing period
>> readings show DEL exceeded REC by 400 kWh, which matches what was billed
>> (net usage of positive 400 kWh).
>>
>> Jason Szumlanski
>>
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Re: [RE-wrenches] grounding on metal roofs

[AE Solar]

thanks glenn. and what about commercial? anyone have code references
regarding grounding when doing solar on metal roofs? i thought a few years
back there was a conversation on this but i can't seem to find it.

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468


On Sun, Jun 17, 2018 at 1:46 PM, glenn.b...@glbcc.com 
wrote:

> We use the Ilsco SGB-4 ground lug on every pan under the array for
> residential systems.
>
> -Glenn
>
> *Sent from my Verizon LG Smartphone*
>
> -- Original message--
> *From: *AE Solar
> *Date: *Sun, Jun 17, 2018 12:29 PM
> *To: *RE-wrenches;
> *Cc: *
> *Subject:*[RE-wrenches] grounding on metal roofs
>
> wrenchers,
> what methods are you all using for grounding on metal roofs? thanks
> adam
>
> Adam Katzman
> Autonomous Energies
> PO Box 1245
> Kingston, NY 12402
> www.autonomousenergies.com
> (518) 567-1468
>
>
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[RE-wrenches] grounding on metal roofs

[AE Solar]

wrenchers,
what methods are you all using for grounding on metal roofs? thanks
adam

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] Squirrel Guards for Solarworld 2.0 Frames

[AE Solar]

SnapNRack makes a ‘box frame adapter’ that will let you use their netting
on panels that don’t have the lip on the panel frame

On Tue, May 8, 2018 at 11:53 AM Kevin Eigel  wrote:

> HI Nick:
>
> We have used the solatrim on Solarworld modules, and it works well,
> although I have some doubts about how long the adhesive will hold up over
> time.
> We purchased it on ebay for a discount.
>
>
> Kevin Eigel
> *Ecohouse Solar*
> 1857 Northwest Blvd. Ste 201, Columbus, OH 43212
> www.ecohousesolar.com
> 614-805-5776
>
>
> On Tue, May 8, 2018 at 11:50 AM, Nik Ponzio, Building Energy <
> npon...@buildingenergyus.com> wrote:
>
>> We need to add squirrel guards to an older system with Solarworld panels.
>> The 2.0 frames are not compatible with the snapNrack or spiffy solar guards
>> that we have used in the past. Any other products that we should consider?
>>
>> Has anyone used the  SolaTrim with adhesive attachment?
>> http://solatrim.com/
>>
>>
>> --
>> Nik Ponzio
>> Building Energy
>> 1570 South Brownell Road
>> Williston, VT 05495
>> 802-859-3384 ext.115
>> http://www.BuildingEnergyVT.com
>>
>>
>>
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Re: [RE-wrenches] Enphase IQ series inverters

[AE Solar]

one thing that's cool with the new IQ system is that you have the option to
not only monitor your production, but also your consumption. in order to do
this you will need to run a CT to the lineside of your MSP, so even if you
use a dedicated load center for Enphase equip, be prepared to run wire to
the MSP if you want to use the consumption feature.  also worth noting that
while their isn't a neutral coming from the inverters, you will need a
neutral in the load center for the envoy...

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468


On Fri, Mar 30, 2018 at 1:11 PM, Wayne Irwin 
wrote:

> We always install a separate sub-panel for all Enphase circuits with the
> Envoy tied in the sub panel bas well. Communication is never an issue with
> this method. I have to say that Enphase may have (dare I say it) the most
> reliable monitoring available.
> One trick we've learned is, if possible, use the wps option to gain web
> access so that when your customer changes their WiFi password the Envoy is
> not locked out causing you to make another trip.
>
> Wayne Irwin,
> President
> License #CVC56695
> State Licensed Solar Contractor
> Pure Energy Solar International Inc.
> wa...@pureenergysolar.com
> http://PureEnergySolar.com
> http://SolarChargingStation.net
> 352 377-6527 <(352)%20377-6527> Office
> 352 336-3299 <(352)%20336-3299> Fax
>
>
> The Sun Is Always Shining!
>
> The content of this message is Pure Energy Solar Confidential. If you are
> not the intended recipient and have received this message in error, any use
> or distribution is prohibited. Please notify me immediately by reply e-mail
> and delete this message from your computer system. Thank you.
> --
> *From:* RE-wrenches  on behalf
> of William Miller 
> *Sent:* Friday, March 30, 2018 11:16:57 AM
>
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Enphase IQ series inverters
>
>
> Wayne:
>
>
>
> Have you had any difficulties with communications reliability?  Do you
> install a separate load center for Enphase Equipment?  Are there any tips
> or tricks one might not be aware of?
>
>
>
> Thank you for any information you can share.
>
>
>
> Sincerely,
>
>
>
> William Miller
>
>
>
> [image: Gradient Cap_mini]
> Lic 773985
> millersolar.com
> 
> 805-438-5600 <(805)%20438-5600>
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
> Behalf Of *Wayne Irwin
> *Sent:* Friday, March 30, 2018 8:14 AM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Enphase IQ series inverters
>
>
>
> We've been using them for about a year now. So far no failures which is
> quite remarkable considering the fairly large number that we've installed.
> We're keeping our fingers crossed!
>
> Wayne Irwin,
> President
> License #CVC56695
> State Licensed Solar Contractor
> Pure Energy Solar International Inc.
> wa...@pureenergysolar.com
> http://PureEnergySolar.com
> 
> http://SolarChargingStation.net
> 
> 352 377-6527 <(352)%20377-6527> Office
> 352 336-3299 <(352)%20336-3299> Fax
>
>
> The Sun Is Always Shining!
>
> The content of this message is Pure Energy Solar Confidential. If you are
> not the intended recipient and have received this message in error, any use
> or distribution is prohibited. Please notify me immediately by reply e-mail
> and delete this message from your computer system. Thank you.
> --
>
> *From:* RE-wrenches  on behalf
> of Drake 
> *Sent:* Friday, March 30, 2018 10:20:51 AM
> *To:* RE-wrenches
> *Subject:* [RE-wrenches] Enphase IQ series inverters
>
>
>
> Hello Wrenches,
>
> Does anyone have a track record on the Enphase IQ inverter?
>
> Thanks,
>
> Drake
>
> Drake Chamberlin
>
>
>
>
>
> *Athens Electric LLC OH License 44810 CO License 3773 NABCEP Certified
> Solar PV 740-448-7328 <(740)%20448-7328> *http://athens-electric.com/
> 
>
> ___

[RE-wrenches] Prism Solar Panels Failing

[AE Solar]

Hey Wrenchers,
We just did our first install with Prism Solar bi-facial panels (Bi-48
286's).  So far two panels have shattered already. Both were from mild
impacts (the battery of a drill hitting the panel with not much force
behind it). The system is only about 6 weeks old. I'm in contact with Prism
and waiting to hear their response but am wondering if anyone else has
worked with these panels or heard of any problems like this?
Adam

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468
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[RE-wrenches] Flashing for flat roofs

[AE Solar]

Wrenchers,
We have a residential system that will sit on a small roof section  that
has minimal pitch (5 degrees) and has been roofed with rollout asphalt
roofing. Anyone have good products they recommend for flashing attachment
points? Was going to have it re-done with EPDM. Thanks for any thoughts...
Adam

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] Puerto Rico

[AE Solar]

Wrenches,
Is anyone aware of any existing or future efforts that solar techs can tap
into in order to lend a hand either here or over in PR? I had been pursuing
a project out of NY that is going to be sending equipment (they are still
accepting dontions) and technicians down later this week but their sporadic
communication makes me assume they aren't in need anymore. If anyone is
aware of other ways folks with solar experience and connections to solar
equipment can lend a hand please holler.
Adam

On Sun, Oct 1, 2017 at 11:22 AM Glenn Burt  wrote:

> Is the Xantrex xPower 1500 still available?I have had one for years and it
> has worked great in power backups as well as out of my work truck.Just add
> solar and a cig lighter USB adapter and you could meet your requirements.
> GlennSent from my 'smart' phone so please excuse spelling and
> typographical errors.
> -- Original message--From: Howie MichaelsonDate: Sun, Oct 1, 2017
> 1:52 AMTo: RE-wrenches;Cc: Subject:[RE-wrenches] Puerto Rico
> Esteemed Wrenches,
>
> I have friends in San Juan, with a mostly intact house (fortunately) but
> not much else. They have very limited cell service (texting only) and a
> temporarily borrowed consumer battery/inverter pack with small attached
> solar which gives them enough power to charge his cell phone and run a fan
> for a while at night. The little I've heard from them, things are desperate
> and getting worse on a daily basis. They have I am trying to figure out 2
> things:
>
> 1. My friend is looking for a small, simple system to run their fridge,
> small fans, cell phone charger, and a few lights for his family. I am
> trying to figure out what to send them (via some of their family in
> Florida). I'm thinking a 1500-2000 Watt inverter, (2) 12 volt L16 AGMs, and
> a 300 Watt module with perhaps a simple PWM charge controller and load
> control.
>
> 2. I am considering traveling there with my daughter sometime this winter
> (depending on how the recovery goes) in order to help bring some smaller,
> functional power systems to folks that will surely need the help. Not sure
> if I can organize/leverage cheap or donated supplies from manufacturers or
> distributors and somehow get them down there with us.
>
> Anyone with island/developing world (which PR certainly is at this point)
> experience have any suggestions for best practices, appropriate equipment,
> effective approaches to such an endeavor, having never really attempted
> anything like this before. I want to be helpful and thoughtful about my
> effort, bringing items and attitudes that can help in the immediate as well
> as the medium term.
>
> I know this is not exactly on topic to this list, so I'm not sure if
> responses should be on or off list. Michael?
>
> TIA,
> Howie
> Howie Michaelson
> NABCEP Certified Solar PV Installer™
> Sun Catcher, LLC
> Solar Energy Systems Sales and Service
> VT Solar Electric Incentive Partner
> 802-272-0004 <%28802%29%20272-0004>
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Autonomous Energies
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(518) 567-1468
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Re: [RE-wrenches] AFCI problems with SMA RSB

[AE Solar]

Was it raining on the days you got the error? We had that problem on a
system during low light (beginning or end of a day) on days when it was
raining (although I think it was actually an arc fault message). It was
unrelated to an RSB (didn't exist yet). There is a thread about it here
somewhere I could try and dig up...

On Fri, Sep 29, 2017 at 5:32 PM Bruce Erickson 
wrote:

> Hi All,
>
> I’m wondering if anyone else is having trouble with the SMA Rapid Shutdown
> Box. We have an installation where an SMA 7700TL-US-22 (rebranded as
> SunPower) is fed by an array with a Rapid Shutdown Box. Many, but not all,
> mornings, the inverter would fail the AFCI self-test on wakeup. When reset,
> it would operate fine all day. There was never an actual indication of an
> arc fault, just the self-test failure. SunPower, in consultation with SMA,
> decided to replace the inverter. Everything worked normally for a couple of
> weeks, then the problem resumed. Again, no arc-fault indication, just the
> self-test failure and then full operation the rest of the day after
> resetting.
>
> We began to suspect the Rapid Shutdown Box, so we bypassed it completely,
> and there were absolutely no problems for several weeks. SMA was then
> willing to replace the RSB, after which everything worked fine for about a
> week, then this morning the same issue. Again, self-test failure, then when
> reset, it has to go through another self-test, which it always passes and
> then runs all day.
> Has anyone had problems with the RSB, or, with AFCI in general?
>
> Based on this experience, this is the second and last RSB we’ve used, and
> have somewhat reluctantly gone to all micro inverters to meet rapid
> shutdown.
>
> Bruce Erickson
> Mendocino Solar Service
> PO Box 1252
> Mendocino, CA 95460
> 707-937-1701
> 707-937-1741 fax
> br...@mendocinosolar.com
>
> Connecting Mendocino County to Solar Since 1994
>
>
>
>
>
>
>
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Re: [RE-wrenches] Disposal of large scale PV installation?

[AE Solar]

I'm just following up on this thread late. We are located not too far from
the array that was coming down and ended up putting in a bid to do the
demolition/removal of the panels. The contract was won by someone else, so
I'm not sure where those specific panels will end up, but it was definitely
an interesting project to research. In all the folks I talked with I only
heard of one other large scale system (5 MW maybe?) that came down
prematurely (due to hail damage). I assume that decommissioning these large
scale systems is something that is going to become more and more prevalent
though. Moving forward I think we will be trying to add the deconstruction
of large scale arrays into our scope of work.

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468


On Fri, Apr 21, 2017 at 5:11 PM, Glenn Burt  wrote:

> I wonder if an organization like Habitat for Humanity would be interested?
> --
> From: Dan Fink 
> Sent: ‎4/‎21/‎2017 14:15
> To: RE-wrenches 
> Subject: Re: [RE-wrenches] Disposal of large scale PV installation?
>
> I agree Ray - and with situations like this recent 1+ mW one I got the
> call on, it's the demolition company or in the case of a tractor-trailer
> wreck, the salvage company -- see
> http://otherpower.com/damaged-pv-module-container-142-kw
>
> The problem is that salvage and demo companies business is getting rid of
> this stuff FAST, not parting it out, as they have no place to store it,
> nobody to manage any parting out, And with PV prices so low.
>
> The people who need this equipment the most are the least able to afford
> it.
>
> Dan Fink
> Professor of Solar Energy Technology, Ecotech Institute
> IREC Certified Instructor™ for:
> ~ PV Installation Professional
> ~ Small Wind Installer
>
> [The entire original message is not included.]
>
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[RE-wrenches] Racking for solar canopy

[AE Solar]

Wrenches,
We are doing some small solar canopies (bifacial panels on wooden purgola
type substructures) and looking for racking ideas. The solution offered to
us right now is by a company called structural solar, and is nice because
it is sleek, offers a place to hide all the wires, and creates a rain tight
canopy...but it's pricey. Does anyone have other recommendations
for racking solutions they have used in similar scenarios?
Thanks
Adam
-- 
Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] Solarworld 285 watt end frames

[AE Solar]

With Solarworld/SnapNRack we run wires in the rail and use clips on the
long edge of the frame when needed. SnapNRack has a clip that fits in the
upper rail groove to hold wires down into it. The snap n rack part you are
referencing (I think they call it 'box frame adapter') is good if you want
to attach squirrel netting to the short edge of the panels, but it's bulky
and expensive. I don't think it will do much for attaching wire clips.
Adam

On Wed, May 24, 2017 at 8:11 AM Dana  wrote:

> I am installing SolarWorld 285 w modules for our new home on Array
> Technologies dual axis trackers [we are in a canyon].
>
> The side rails of the frames are typical with a flange however the short
> end frame is this little kind of “I” beam that does not allow for any wire
> clips.
>
> I am wondering what other folks have done in this situation, short of
> drilling the module frame?
>
> SnapnRack has a ¾” thick clamp that creates a 7/8” min gap between the
> module columns that is rather unsightly.
>
> Suggestions?
>
>
>
>
> 
>
> Dana Orzel   Great Solar Works, Inc.
>
> *208.721.7003   d...@solarwork.com
> *
>
> Idaho Contractor - # 028765  Idaho PV # 028374
>
> NABCEP # 051112-136   www.solarwork.biz
>
> *"Responsible Technologies for Responsible People since 1988"  *
>
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Re: [RE-wrenches] SMA Rapid Shutdown issues

[AE Solar]

I know that when I talked to SMA about our first install with the RSD boxes
they suggested  an order of operations for making all the final connections
that might not be mentioned in the install manual. It wAs supposed to help
prevent some problem they had been having with the boxes (although I'm
unclear what the specifics of the problem was). They mentioned that they
were having people disconnect all the MC connections to the box and re
connect to reset the box if an issue occurred. We never ended up having any
issues so didn't need to go
Through that procedure. Don't know if they mentioned that as an option for
you on your trouble shooting?

On Tue, Feb 21, 2017 at 1:52 PM Laura Conchelos 
wrote:

> I wondered if anybody else had run into issues with SMA's rapid shutdown
> box?  We turned on the system about a month ago and seem to have problems
> with the relays in the rapid shutdown not closing periodically.
> Unfortunately it is an intermittent problem so unless we're onsite at the
> right time, there is nothing SMA will do. Two of us have been through
> troubleshooting with them and the system works fine. The client has reset
> the disconnect a couple of times with the key at the controller. One time
> it worked. Another time it did not and the light on the red button stayed
> on.
>
> It seems as though the connection from the array to the inverter will come
> back in the morning even if the disconnect box wasn't allowing it the day
> before. We're guessing a bad relay but haven't been able to prove it so
> far.
>
> Laura Conchelos
> Solar Gain Services
> Monte Vista CO
> 81144
>
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Re: [RE-wrenches] Retaining Clips

[AE Solar]

OK thanks August. 2014 NEC 705.12(D) (5) is the answer I was looking for. I
wasn't aware that I didn't need the retention clip. Sorry for the
confusion. Thanks everyone.


On Wed, Nov 30, 2016 at 9:00 PM, Drake  wrote:

> Hi Adam,
>
> It ok for the main lugs to be hot. There will always be a hot wire in the
> box somewhere. The main lugs are a very safe place to land it. Even with
> main breakers, the lugs feeding the breakers are always hot.
>
> This is a lot safer than having an "always hot" wire going to a breaker
> that could conceivably come loose even with a retainer.
>
> Best,
>
> Drake
>
>
> At 02:11 PM 11/30/2016, you wrote:
>
> I'm also just now realizing that if I were to rate my wire from the
> tap/main panel to my 70A disconnect I would want #6awg wire and the QO
> breakers only go to #8.Â
>
> Drake if I went from the tap right into the lugs, it would leave those
> lugs hot and exposed. Is that my only option though?Â
>
> Adam Katzman
> Autonomous Energies
> PO Box 1245
> Kingston, NY 12402
> www.autonomousenergies.com
> (518) 567-1468
>
>
> On Wed, Nov 30, 2016 at 1:57 PM, Drake < drake.chamberlin@
> redwoodalliance.org> wrote:
> Can you come out of the line side tap to the lugs, and connect the solar
> to the breaker terminals? This way a retainer clip is not required.
>
> At 11:12 AM 11/30/2016, you wrote:
>
> Sorry I should have elaborated more from the beginning.
>
> Â
>
> I am using the panel as a service disconnect for a lineside connection
> (can̢۪t use a fused/bladed disco because of space conconstraints).
> Originally I bought a QO 70A panel, but soon realized that the Square D
> retention clip (PK2MB) is only compatible with their larger panels. So I
> bought a larger panel (100A 8 Circuit) and then received some feedback that
> having the open spaces (even if labeled that “Do N Not Add Loads†)
> could raise a flag with an inspector. So then I was back on the hunt for a
> dedicated 2 Pole 60A or 70A panel with a compatible retention clip for a
> 30A breaker. Eaton̢۪s retention options only start rt in the 60A range
> (the smaller breakers don̢۪t have the hole in them to to put the bolt
> through). Square D said they don̢۪t have an option fo for their 70A
> panel. There aren̢۪t any good Siemans distributors near me be but I
> wasn̢۪t t finding an option via google for them either.
>
> Â
>
> I talked with another Wrencher on the phone and received this feedback
> which I̢۪m just going to cut and paste to include it it in this thread:
>
>
> “The NEC doesn’t require a hold hold down clamp for the circuit
> breaker unless it can be backfed from a multi-mode or stand-alone inverter
> (690.10(E)).
>
> The language implies that a hold-down is therefore not required elsewhere.
> Most modern breakers (def. QO’s) are not ot marked “line†¬ and
> “load†so no problem there (also in in same code section).
>
> Â
>
> Even when it was a requirement for all PV outputs, John Wiles had argued
> that taking off the panel cover, which required a tool, served as the
> hold-down, and this was generally accepted.â€
>
> Â
>
> So taken that advice I’m back to using the QO 70A panel but without a
> retention clip (or calling the lid the "retention clip").
>
> Â
>
> For what its worth I have passed inspections prior using the retaining
> clip from a generator interlock kit (QOCGK2C) on a QO 100A panel, but
> felt like there must be a better option out there
>
> Adam Katzman
> Autonomous Energies
> PO Box 1245
> Kingston, NY 12402
> www.autonomousenergies.com
> (518) 567-1468
>
>
> On Wed, Nov 30, 2016 at 10:45 AM, Drake < drake.chamberlin@
> redwoodalliance.org> wrote: Siemens has main breaker retainers. The
> retainers for QO seem work on some boxes and not others. It doesn't work on
> 6 space boxes I've purchased, but does work on the 8.
>
> At 10:14 PM 11/29/2016, you wrote:
>
> Wrenchers,
> I’m trying to find a 60A 2 Pole Breakeaker Box that hashas a
> compatible retaining clip. The QO retaining clip (PK2MBCP) seems to only be
> compatible with their 4-8 circuit load centers. What are my options?
> Thanks! Thanks
> Adam ___ List sponsored by
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Re: [RE-wrenches] Retaining Clips

[AE Solar]

I'm also just now realizing that if I were to rate my wire from the
tap/main panel to my 70A disconnect I would want #6awg wire and the QO
breakers only go to #8.

Drake if I went from the tap right into the lugs, it would leave those lugs
hot and exposed. Is that my only option though?

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468


On Wed, Nov 30, 2016 at 1:57 PM, Drake  wrote:

> Can you come out of the line side tap to the lugs, and connect the solar
> to the breaker terminals? This way a retainer clip is not required.
>
> At 11:12 AM 11/30/2016, you wrote:
>
> Sorry I should have elaborated more from the beginning.
>
> Â
>
> I am using the panel as a service disconnect for a lineside connection
> (can’t use a fused/bladed disco because of space constraints). Originally
> I bought a QO 70A panel, but soon realized that the Square D retention clip
> (PK2MB) is only compatible with their larger panels. So I bought a larger
> panel (100A 8 Circuit) and then received some feedback that having the open
> spaces (even if labeled that “Do Not Add Loads†) could raise a flag
> with an inspector. So then I was back on the hunt for a dedicated 2 Pole
> 60A or 70A panel with a compatible retention clip for a 30A breaker.
> Eaton’s retention options only start in the 60A range (the smaller
> breakers don’t have the hole in them to put the bolt through). Square D
> said they don’t have an option for their 70A panel. There aren’t any
> good Siemans distributors near me but I wasn’t finding an option via
> google for them either.
>
> Â
>
> I talked with another Wrencher on the phone and received this feedback
> which I’m just going to cut and paste to include it in this thread:
>
>
> “The NEC doesn’t require a hold down clamp for the circuit breaker
> unless it can be backfed from a multi-mode or stand-alone inverter
> (690.10(E)).
>
> The language implies that a hold-down is therefore not required elsewhere.
> Most modern breakers (def. QO’s) are not marked “line†and “loadâ€
> so no problem there (also in same code section).
>
> Â
>
> Even when it was a requirement for all PV outputs, John Wiles had argued
> that taking off the panel cover, which required a tool, served as the
> hold-down, and this was generally accepted.â€
>
> Â
>
> So taken that advice I’m back to using the QO 70A panel but without a
> retention clip (or calling the lid the "retention clip").
>
> Â
>
> For what its worth I have passed inspections prior using the retaining
> clip from a generator interlock kit (QOCGK2C) on a QO 100A panel, but feltÂ
> like there must be a better option out there
>
> Adam Katzman
> Autonomous Energies
> PO Box 1245
> Kingston, NY 12402
> www.autonomousenergies.com
> (518) 567-1468
>
>
> On Wed, Nov 30, 2016 at 10:45 AM, Drake < drake.chamberlin@
> redwoodalliance.org> wrote:
> Siemens has main breaker retainers. The retainers for QO seem work on some
> boxes and not others. It doesn't work on 6 space boxes I've purchased, but
> does work on the 8.
>
> At 10:14 PM 11/29/2016, you wrote:
>
> Wrenchers,
>
> I̢۪m trying to find a 60A 2 Pole Breaker Box that hashas a compatible
> retaining clip. The QO retaining clip (PK2MBCP) seems to only be compatible
> with their 4-8 circuit load centers. What are my options? Thanks!
>
> Thanks
>
> Adam
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Re: [RE-wrenches] Retaining Clips

[AE Solar]

Sorry I should have elaborated more from the beginning.



I am using the panel as a service disconnect for a lineside connection
(can’t use a fused/bladed disco because of space constraints). Originally I
bought a QO 70A panel, but soon realized that the Square D retention clip
(PK2MB) is only compatible with their larger panels. So I bought a larger
panel (100A 8 Circuit) and then received some feedback that having the open
spaces (even if labeled that “Do Not Add Loads”) could raise a flag with an
inspector. So then I was back on the hunt for a dedicated 2 Pole 60A or 70A
panel with a compatible retention clip for a 30A breaker. Eaton’s retention
options only start in the 60A range (the smaller breakers don’t have the
hole in them to put the bolt through). Square D said they don’t have an
option for their 70A panel. There aren’t any good Siemans distributors near
me but I wasn’t finding an option via google for them either.



I talked with another Wrencher on the phone and received this feedback
which I’m just going to cut and paste to include it in this thread:


“The NEC doesn’t require a hold down clamp for the circuit breaker unless
it can be backfed from a multi-mode or stand-alone inverter (690.10(E)).

The language implies that a hold-down is therefore not required elsewhere.
Most modern breakers (def. QO’s) are not marked “line” and “load” so no
problem there (also in same code section).



Even when it was a requirement for all PV outputs, John Wiles had argued
that taking off the panel cover, which required a tool, served as the
hold-down, and this was generally accepted.”



So taken that advice I’m back to using the QO 70A panel but without a
retention clip (or calling the lid the "retention clip").



For what its worth I have passed inspections prior using the retaining clip
from a generator interlock kit (QOCGK2C) on a QO 100A panel, but felt like
there must be a better option out there

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468


On Wed, Nov 30, 2016 at 10:45 AM, Drake <
drake.chamber...@redwoodalliance.org> wrote:

> Siemens has main breaker retainers. The retainers for QO seem work on some
> boxes and not others. It doesn't work on 6 space boxes I've purchased, but
> does work on the 8.
>
> At 10:14 PM 11/29/2016, you wrote:
>
> Wrenchers,
>
> I’m trying to find a 60A 2 Pole Breaker Box that has a compatible
> retaining clip. The QO retaining clip (PK2MBCP) seems to only be compatible
> with their 4-8 circuit load centers. What are my options? Thanks!
>
> Thanks
>
> Adam
> ___
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[RE-wrenches] Retaining Clips

[AE Solar]

Wrenchers,

I’m trying to find a 60A 2 Pole Breaker Box that has a compatible retaining
clip. The QO retaining clip (PK2MBCP) seems to only be compatible with
their 4-8 circuit load centers. What are my options? Thanks!

Thanks

Adam
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Re: [RE-wrenches] Conduit in a slab

[AE Solar]

Thanks Allan,
I agree the PVC is better for corrosion, but if I sweep up with PVC I will
be running DC in PVC inside the house for however many inches it takes to
convert to EMT...which is a part I'm not sure about.

On Sunday, October 30, 2016, Allan Sindelar  wrote:

> Adam,
> Over time earth can be corrosive to metal, which is why good practice here
> is to use PVC below grade and transition to EMT once the conduit is exposed
> above grade. I suspect that concrete would have similar effects. In New
> Mexico, state Code requires Schedule 80 if PVC is used above grade, I
> suspect primarily because of the intensity of our high-elevation sun, so by
> that logic you'd use a Sch. 80 90 sweep to exit the slab, then transition.
> Allan
>
> *Allan Sindelar*
> al...@sindelarsolar.com
> 
> NABCEP Certified PV Installation Professional
> NABCEP Certified Technical Sales Professional
> New Mexico EE98J Journeyman Electrician
> Founder (Retired), Positive Energy, Inc.
> *505 780-2738 cell*
>
>
> On 10/29/2016 6:50 PM, AE Solar wrote:
>
> Wrenches,
> I have a project where the DC run is going through the wall system of the
> house, down through the slab, out the building underground and into another
> building. My preference would be to run PVC in the slab and then stub out
> of it with a metal 90.
> I'm unclear if that is allowed. Is conduit in the slab considered to be
> inside the house and therefore should be metal? Thanks for any thoughts.
> Adam
>
>
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-- 
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Autonomous Energies
PO Box 1245
Kingston, NY 12402
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(518) 567-1468
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[RE-wrenches] Conduit in a slab

[AE Solar]

Wrenches,
I have a project where the DC run is going through the wall system of the
house, down through the slab, out the building underground and into another
building. My preference would be to run PVC in the slab and then stub out
of it with a metal 90.
I'm unclear if that is allowed. Is conduit in the slab considered to be
inside the house and therefore should be metal? Thanks for any thoughts.
Adam
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[RE-wrenches] Bifacial Panels

[AE Solar]

Wrenchers,

A customer is interested in a bifacial panel for a solar canopy at the
entrance of their business. They had looked into Lumos and Supreme. Some
time ago I had looked into Prism. Right now I'm considering Sunpreme only
because they have panels up to 370 Watts. Honestly though, I've never
worked with any of these. Anyone have any feedback? Any obvious pros and
cons (anything from ease of install, to aesthetics, to durability)? Thanks
for any thoughts.

Adam
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Re: [RE-wrenches] closets and working space

[AE Solar]

Ha thanks. I figured there was something about that situation that wasn't
right. The main panel is already located there. Maybe I will just add a
partition into the closet (it's probably 8' wide) so that half can be
designated 'coat closet' and the other half designated 'utility closet'?

On Tuesday, May 31, 2016, August Goers  wrote:

> Hi Adam,
>
>
>
> Check out “NEC 240.24(D) Not in Vicinity of Easily Ignitible Material.
> Overcurrent devices shall not be located in the vicinity of easily
> ignitable material, such as in clothes closets.”
>
>
>
> -August
>
> Luminalt
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org
> ]
> *On Behalf Of *AE Solar
> *Sent:* Monday, May 30, 2016 5:08 PM
> *To:* RE-wrenches
> *Subject:* [RE-wrenches] closets and working space
>
>
>
> Hey Wrenches,
>
> We'd like to put a combo panel in a coat closet (its shallow and wide)
> right next to the existing panel. With the doors open (they are pocket
> doors) it is fine with working space requirements. I know the AHJ will have
> the ultimate say and am checkin in with them as well but wondering if
> anyone has thoughts on why that could be a bad idea?
>
> Thanks
>
> Adam
>
>
>


-- 
Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468
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[RE-wrenches] closets and working space

[AE Solar]

Hey Wrenches,
We'd like to put a combo panel in a coat closet (its shallow and wide)
right next to the existing panel. With the doors open (they are pocket
doors) it is fine with working space requirements. I know the AHJ will have
the ultimate say and am checkin in with them as well but wondering if
anyone has thoughts on why that could be a bad idea?
Thanks
Adam
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[RE-wrenches] Winter Battery Maintenance

[AE Solar]

Hey Wrenchers,

A friend wants a very small battery set up at hunting cabin (like under
1kW). It will only be used in the warmer months. I'm wondering what you all
recommend for the batteries over the winter. I assume the ideal situation
would be that they would be disconnected and brought somewhere warm for the
winter (the cabin will be subject to below freezing temps)??

So long as they go into the colder months with a full charge is it alright
to leave them hooked up? I don't think the friend will be savvy enough to
disconnect/connect them every year and I don't feel like having to go out
there every season for them.

Thanks for any thoughts.
Adam

Adam Katzman
Autonomous Energies
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Re: [RE-wrenches] AFCI trip on metal roof

[AE Solar]

We had that issue once. It was after a night of heavy rainfall and the
error only read for the first few early hours of the day. SMA told us it
was a poor connection in an MC4 connector that most likely got some
dampness in it...

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468


On Wed, Mar 23, 2016 at 5:16 PM, August Goers  wrote:

> Hi Drake,
>
>
>
> What model SMA inverter(s) and modules do you have? We had one case where
> a MC4 connector under the array was not making good contact. It was not
> seated properly when the installer made up the connector and the arc fault
> sensor in the inverter did its job. We had another site where some
> electrical noise on the AC side, presumably a sump pump, caused the issue
> and we could not solve it so had to switch to another inverter
> manufacturer. There were other cases where the impedance or other
> electrical characteristics of the solar modules where the likely culprit.
>
>
>
> Is your roof and array totally equipment grounded?
>
>
>
> Best,
>
>
>
> August
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
> Behalf Of *Drake
> *Sent:* Wednesday, March 23, 2016 2:08 PM
> *To:* RE-wrenches@lists.re-wrenches.org
> *Subject:* [RE-wrenches] AFCI trip on metal roof
>
>
>
> Hello Wrenches,
>
> We have a project with an array on a large metal roof. The AFCI has been
> tripping. Investigating the system, there is no evidence of any arcing: the
> wiring and connections are all very tight.
>
> SMA tech support says it is likely that the nuisance tripping comes from
> electrical noise getting picked up by the large metal roof.
>
> What has been your overall experience with nuisance tripping of arc fault
> protection? What were the suspected causes? What was the solution?
>
> Thanks,
>
> Drake
>
> Drake Chamberlin
>
>
>
>
>
> *Athens Electric LLCOH License 44810CO License 3773NABCEP Certified Solar
> PV 740-448-7328 <740-448-7328>*http://athens-electric.com/
>
>
> 
>
> No threats detected. www.avast.com
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[RE-wrenches] MIGB's

[AE Solar]

Wrenchers,
What are you all using as strain reliefs on the ends of conduit runs that
run between arrays on roof mounts? We have arrays on two roof sections with
a piece of rigid conduit connecting the two,  and galvanized MIGB's (ground
bushings maybe some people call them?) on each end of the pipe. It was just
cited on an inspection that this was improper use of equipment because the
galv MIGB's are not rated for outdoor use? Anyone have anything to back up
the use of this method or have a preferred method for strain relief and
bonding for this application? Thanks for any thoughts.
Adam

Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] Solarworld

[AE Solar]

What's your definition of cheap...and for which size panels?

On Wednesday, January 20, 2016, Jerry Shafer 
wrote:

> I deal with Platt as there are very close to the SW factory
> Jerry
> On Jan 20, 2016 1:58 PM, "Drake"  >
> wrote:
>
>> A lot of ads for cheap Solarworld modules come into my inbox. Does anyone
>> know why they are so cheap? Does anyone have a trusted distributor for
>> bargain Solarworld modules?
>>
>> Thanks,
>>
>> Drake
>>
>>
>> ---
>> This email has been checked for viruses by Avast antivirus software.
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Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468
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[RE-wrenches] Masdar Panels

[AE Solar]

Hey Wrenchers,
I have a business owner who bought (on a whim?) 2,000 Masdar MPV-S panels a
few years back and they have been sitting in the shipping container ever
since. Now he wants them installed. From what I've read so far the company
went under last year and they only had a 5 year limited-warranty even when
the company still existed. Anyone ever install these or have any knowledge
of how well they held up? Thanks
Adam


Adam Katzman
Autonomous Energies
PO Box 1245
Kingston, NY 12402
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] Fences Schools and Codes

[AE Solar]

They said the incentive is the same as commercial.

On Sunday, November 1, 2015, Glenn Burt  wrote:

> Confirm with NYSERDA what their requirements are if you will be applying
> for NY Sun incentives.
>
> Sincerely,
> Glenn Burt
> Sent from my 'smart' phone so please excuse grammar and typos.
> ------
> From: AE Solar
> 
> Sent: ‎11/‎1/‎2015 18:24
> To: RE-wrenches
> 
> Subject: [RE-wrenches] Fences Schools and Codes
>
> We are doing a ground mount system at a private school. I recommended a
> fence be put around it and they want to mimic the aesthetic of their
> current fence, which is a sort of picket fence with rough sawn lumber. I
> will check with the AHJ but was wondering if anyone knows of code specific
> to fencing that should be kept in mind? Thanks
> Adam
>
> Adam Katzman
> Autonomous Energies
> 4872 State Route 9G
> Germantown NY, 12526
> www.autonomousenergies.com
> (518) 567-1468
>
>

-- 
Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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[RE-wrenches] Fences Schools and Codes

[AE Solar]

We are doing a ground mount system at a private school. I recommended a
fence be put around it and they want to mimic the aesthetic of their
current fence, which is a sort of picket fence with rough sawn lumber. I
will check with the AHJ but was wondering if anyone knows of code specific
to fencing that should be kept in mind? Thanks
Adam

Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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[RE-wrenches] Double Lug Disco

[AE Solar]

Wrenchers,
A customer is having new services put in and wants to prep for solar. Does
anyone know of, or have recommendations, on a 200A non fused NEMA disco
that they can install so we can easily interconnect on the loadside when we
are ready to put the solar in?
I thought I had heard somewhere of a disco that already had double lugs on
it? If not, does anyone know what manufacturers let you double lug. Thanks
Adam

Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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[RE-wrenches] DC conduit with AC secondary?

[AE Solar]

Wrenchers,
Anyone know of code violations associated with running DC conduit in the
same trench as conduit for AC secondary? Is that allowed? Bad practice even
if allowed?Thanks
Adam

Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] 300 watt 60 cell

[AE Solar]

Yeah we just installed some LG 315's and I believe they are now at 320 in a
60 cell

On Friday, September 18, 2015, Philip Lawes Insoltech <
p...@insoltechsolar.com> wrote:

> LG now offers a 315 watt 60 cell module.
>
> -Original Message-
> From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org
> ] On
> Behalf Of penobscotso...@midmaine.com 
> Sent: Friday, September 18, 2015 4:51 AM
> To: RE-wrenches >
> Subject: Re: [RE-wrenches] 300 watt 60 cell
>
> LG even has a 305 Neon. Very nice modules.
>
> Daryl
>
>
> > LG Neon?  Available through several distributors.
> >
> > Jeff
> >
> > -Original Message-
> > From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org
> ]
> > On Behalf Of jay
> > Sent: Thursday, September 17, 2015 8:03 PM
> > To: RE-wrenches
> > Subject: [RE-wrenches] 300 watt 60 cell
> >
> > HI All,
> >
> > I'm looking for 300 watt ( 290-310 watt) 60 cell modules for client.
> > But I'm having trouble finding anyone carrying them.
> >
> > Any suggestions?
> >
> > thanks in advance.
> >
> > jay
> >
> > peltz power
> >
> >
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Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] Snow Guards

[AE Solar]

As an aside, I often notice arrays that fill a roof (gutter to ridge) that
are often located in places I would assume it would not be good for snow to
shed (i.e. a walkway or driveway). I'm wondering if this is something that
is communicated with customers? Do those of you in snowy areas sacrifice
size of an array to compensate for this or just come to an understanding
with a customer that this is a hazard they (or their cars) could face.

Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468


On Wed, Sep 9, 2015 at 10:50 AM, AE Solar 
wrote:

> Bill,
>
> It's a comp roof @ 30 degrees. The array could be as close as 20" to the
> bottom edge of the roof. Two rows of panels in portrait on two different
> roof sections. It's a 7.2kW system. We are in NY and snow seems to be
> completely variable these last few years but looks like the average has
> been about 60" traditionally.
>
> The snowguards were an afterthought, and I'm not sure if I can switch the
> panels to run in landscape...which would be preferable if snow is going to
> shed slower.
>
> Adam
>
> Adam Katzman
> Autonomous Energies
> 4872 State Route 9G
> Germantown NY, 12526
> www.autonomousenergies.com
> (518) 567-1468
>
>
> On Wed, Sep 9, 2015 at 10:16 AM, frenergy  wrote:
>
>> is it a metal roof, comp? pitch? where is the bottom of the array with
>> respect to the bottom of the roof.  How much snow do you get there?
>>
>> Bill
>> Feather River Solar Electric
>>
>> - Original Message -
>> *From:* AE Solar 
>> *To:* RE-wrenches 
>> *Sent:* Wednesday, September 09, 2015 6:45 AM
>> *Subject:* [RE-wrenches] Snow Guards
>>
>> Hey Wrenchers,
>>
>> I'm looking into snow guards for an array that would shed snow right into
>> a driveway. So far I'm only familiar with Alpine. If anyone has other
>> recommendations let me know?
>>
>> I haven't had to use any sort of snow guard so far, but I guess I should
>> be prepared for winter production to really take a hit?
>>
>> Adam
>>
>> Adam Katzman
>> Autonomous Energies
>> 4872 State Route 9G
>> Germantown NY, 12526
>> www.autonomousenergies.com
>> (518) 567-1468
>>
>> --
>>
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Re: [RE-wrenches] Snow Guards

[AE Solar]

Bill,

It's a comp roof @ 30 degrees. The array could be as close as 20" to the
bottom edge of the roof. Two rows of panels in portrait on two different
roof sections. It's a 7.2kW system. We are in NY and snow seems to be
completely variable these last few years but looks like the average has
been about 60" traditionally.

The snowguards were an afterthought, and I'm not sure if I can switch the
panels to run in landscape...which would be preferable if snow is going to
shed slower.

Adam

Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468


On Wed, Sep 9, 2015 at 10:16 AM, frenergy  wrote:

> is it a metal roof, comp? pitch? where is the bottom of the array with
> respect to the bottom of the roof.  How much snow do you get there?
>
> Bill
> Feather River Solar Electric
>
> - Original Message -
> *From:* AE Solar 
> *To:* RE-wrenches 
> *Sent:* Wednesday, September 09, 2015 6:45 AM
> *Subject:* [RE-wrenches] Snow Guards
>
> Hey Wrenchers,
>
> I'm looking into snow guards for an array that would shed snow right into
> a driveway. So far I'm only familiar with Alpine. If anyone has other
> recommendations let me know?
>
> I haven't had to use any sort of snow guard so far, but I guess I should
> be prepared for winter production to really take a hit?
>
> Adam
>
> Adam Katzman
> Autonomous Energies
> 4872 State Route 9G
> Germantown NY, 12526
> www.autonomousenergies.com
> (518) 567-1468
>
> --
>
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[RE-wrenches] Snow Guards

[AE Solar]

Hey Wrenchers,

I'm looking into snow guards for an array that would shed snow right into a
driveway. So far I'm only familiar with Alpine. If anyone has other
recommendations let me know?

I haven't had to use any sort of snow guard so far, but I guess I should be
prepared for winter production to really take a hit?

Adam

Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] Ground mount for east-west slope

[AE Solar]

You can use kee klamp swivel fittings with schedule 40 pipe for posts

On Friday, August 21, 2015, jerrysgarage01  wrote:

> Wrenches
> Its been a few years but I have gotten top plates from unirac UL- A
> racking that was tilited give them a call or even have them fab-ed up your
> self.
> Jerry
>
>
> Sent via the Samsung Galaxy S™ III, an AT&T 4G LTE smartphone
>
>
>  Original message 
> From: frenergy
> Date:08/21/2015 3:31 AM (GMT-10:00)
> To: RE-wrenches
> Subject: Re: [RE-wrenches] Ground mount for east-west slope
>
> We recently did a job like this on a 17 degree slope, if it helps...
>
> Bill
> Feather River Solar Electric
>
>
> - Original Message -
> From: "William Miller"  >
> To: "RE-wrenches"  >
> Sent: Thursday, August 20, 2015 9:39 PM
> Subject: [RE-wrenches] Ground mount for east-west slope
>
>
> > Friends:
> >
> > I am looking for a ground mount racking system that can be installed on
> a
> > 15 degree slope down to the east. I'd like the verticals to be set in
> > concrete or driven vertically with the horizontals to slope at 15
> degrees.
> >
> > The racking we have used heretofore has required the horizontal members
> to
> > be horizontal and perpendicular to the verticals. What I am seeking
> would
> > allow some adjustment of that angle.
> >
> > Thanks in advance.
> >
> > William
> >
> >
> > ___
> > List sponsored by Redwood Alliance
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-- 
Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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[RE-wrenches] UL 508 Listing

[AE Solar]

 Wrenchers,



I am interested in using a 6 Pole DC disconnect for a project with TL
inverters. It’s made by a company called DC SunVolt. The data sheet says
“Suitable as PV disconnect switch in accordance with Article 690 of NFPA
(NEC) UL 508, including the requirements for PV applications. UL 508i by
UL”.



IT IS NOT UL 1741 listed though.



My understanding is that this is OK , because it’s not a combiner…it’s just
a switch (6 conductors in and 6 conductors out). A colleague expressed
concern that an inspector might give me a warm time about it. I’ve reached
out repeatedly to the inspector and not heard back.



Anyone have thoughts?



Thanks

Adam

Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] Working Space

[AE Solar]

Great thanks. SMA says 36" to the bottom of the disco so will go with that.

On Wednesday, May 13, 2015, August Goers  wrote:

> Hi Adam,
>
>
>
> To the best of my knowledge there is no minimum height specified in the
> NEC. However, many inverter manufacturers specify a minimum height. You’ll
> need refer to the manual for that.
>
>
>
> Best, August
>
>
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org
> ]
> *On Behalf Of *AE Solar
> *Sent:* Wednesday, May 13, 2015 12:37 PM
> *To:* RE-wrenches
> *Subject:* [RE-wrenches] Working Space
>
>
>
> Hey Wrenches,
>
> We are installing some inverters in a basement where the height we hang
> them at is limited by some windows. I'm trying to find a code reference
> that says how far off the ground the DC/AC disco on the inverter needs to
> be but am not finding one. Could be that they are in the 3' range. Not
> ideal but might be our best option. Anyone know where I could look up
> compliance?
>
> Thanks
>
> Adam
>
>
>
> Adam Katzman
> Autonomous Energies
> 4872 State Route 9G
> Germantown NY, 12526
> www.autonomousenergies.com
> (518) 567-1468
>


-- 
Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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[RE-wrenches] Working Space

[AE Solar]

Hey Wrenches,
We are installing some inverters in a basement where the height we hang
them at is limited by some windows. I'm trying to find a code reference
that says how far off the ground the DC/AC disco on the inverter needs to
be but am not finding one. Could be that they are in the 3' range. Not
ideal but might be our best option. Anyone know where I could look up
compliance?
Thanks
Adam

Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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[RE-wrenches] 3" Pipe Fittings/Pinning

[AE Solar]

Does anyone have a products/methods they recommend for pinning 3” galve
pipe to rock for a ground mount? I have a situation where I am pretty sure
pinning will be our best option for some of the posts, but I’m not finding
any kee klamp or similar fittings for 3” pipe.  Thanks for any
thoughts/tips...




Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] Geda Solarlift

[AE Solar]

I'd be interested in seeing that homemade designor a link to the home
power article. We used a conventional lift for a while...it was pretty
noisy, smelly, heavy and loudbut I suppose it was safer than most other
ways of getting panels to the roof...

>
> On Wednesday, April 29, 2015, Benn Kilburn  > wrote:
>
>> I made one from the design that was in HomePower a few years back.
>>  Actually just in the process of rebuilding the wooden mod holder
>> portion. It still has life left in it but I want to make a couple
>> modifications.
>> It has worked great for the past several years. As simple and cheap as it
>> is, not sure if I'd spend the $ on a manufactured one?
>>
>> Benn Kilburn
>> SkyFire Energy Inc.
>> 780-906-7807
>>
>>
>> > On Apr 29, 2015, at 3:31 PM, Lou Russo  wrote:
>> >
>> > Wrenches,
>> >
>> > Anybody out there using the GEDA Solarlift (or any other lift for that
>> matter)? If so what is your opinion of it? Setup time seems a little long,
>> but it could easily make up for it in safety and array installation time.
>> Any input is appreciated.
>> >
>> > Past Wrenches discussions only seem to talk about lifts in general.
>> >
>> > Aloha,
>> >
>> > Lou Russo
>> > (440) 345 6762
>> >
>> > ___
>> > List sponsored by Redwood Alliance
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>> >
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>
> --
> Adam Katzman - Owner/Operator
> Autonomous Energies
> 4872 State Route 9G
> Germantown NY, 12526
> www.AutonomousEnergies.com 
> (518) 567-1468
>
>

-- 
Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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[RE-wrenches] Wire protection for ground mount

[AE Solar]

Hey Wrenchers,

Does anyone have suggestions for netting/protecting wires behind a ground
mount (for keeping hands out of there...not animals). I have seen quite a
few home-made'ish looking options on systems around here (screwing hardware
cloth onto the back of frames/racking, etc) but am looking for a more
professional  optionideally something that is as clean looking as
possible. For what its worth the panels will be (4) high in landscape.
Thanks for any thoughts.

Adam

Adam Katzman - Owner/Operator
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.AutonomousEnergies.com 
(518) 567-1468


-- 
Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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[RE-wrenches] TL Code Reference

[AE Solar]

Hey Wrenchers,
Can someone point me towards where the code references the need to
disconnect both conductors in an install with transformerless/ungrounded
inverters? Thanks
Adam

Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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[RE-wrenches] Corrugated Roof Brackets

[AE Solar]

Hey Wrenchers,
Anyone have feedback or preferences on mounting systems for corrugated
roofs? I'm looking at the S-5! CorruBracket
. Its for a very small system on
a hunting cabin. The pitch is probably about 20 degrees and and I'm
concerned about leaks over time. Any recommendations are appreciated. Thanks
Adam

Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468
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Re: [RE-wrenches] TL inverter with long DC Feeder

[AE Solar]

just found this product
DC Sun Volt 
There web page has up to 4 Pole DC disco's but on the phone they said they
also have a 6 Pole available and they make custom disco/combiners with the
amount of poles you need. Might be relevant to the situation.

Adam

Adam Katzman
Autonomous Energies
4872 State Route 9G
Germantown NY, 12526
www.autonomousenergies.com
(518) 567-1468


On Thu, Oct 9, 2014 at 1:30 PM, b...@midnitesolar.com 
wrote:

>
>
> Sorry William.  My mixup/mistake.
>
> The switch is only 4 poles, not 8 poles.
>
> I meant 8 fuses for 4 PV strings for non-isolated/ungrounded PV systems
> and 2 separate outputs for dual MPPT input inverters.
>
> boB
>
>
>
> On 10/9/2014 11:46 AM, William Miller wrote:
>
>  Bob:
>
>
>
> I reviewed the link you sent and I do not see any reference to an 8 pole
> disconnect.  Could you clarify, please?
>
>  Thanks,
>
>
>
> William Miller
>
>
>
> [image: Gradient Cap_mini]
> Lic 773985
> millersolar.com 
> 805-438-5600
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org
> ] *On Behalf Of *
> b...@midnitesolar.com
> *Sent:* Wednesday, October 08, 2014 11:46 AM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] TL inverter with long DC Feeder
>
>
>
>
> William,
> There is this DLTL disco with 8 poles.  I understand that the "street
> price" is very possible less than the $579  4-pole you cited earlier.
>
> For future reference, this is also rapid shutdown ready.
>
>
> http://www.midnitesolar.com/productPhoto.php?product_ID=583&productCatName=RAPID-SHUTDOWN-SYSTEM-NEC-690.12&productCat_ID=44&sortOrder=2&act=p
>
> boB
>
>
>
>
> On 10/7/2014 7:52 PM, William Miller wrote:
>
> Jeremy:
>
>
>
> With 4 strings of PV into 2 transformerless inverters, I would need 2 of
> them.  At $579.00 each this is a deal killer.
>
>
>
> William
>
>
>
>
>
> [image: Gradient Cap_mini]
> Lic 773985
> millersolar.com 
> 805-438-5600
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org
> ] *On Behalf Of *All Solar,
> Inc.
> *Sent:* Tuesday, October 07, 2014 4:28 PM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] TL inverter with long DC Feeder
>
>
>
> Use the Midnite SOB series.
>
> They have a 4 pole
>
> Jeremy Rodriguez,
>
> President
>
>
>
>
>
>
>
> ___
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