Re: [RE-wrenches] Long span commercial solar racking

[Lorenzo Ortiz]

Check out Brooklyn Solar . They have a
system that sounds sort of like what you're describing.
On Fri, Aug 27, 2021 at 6:34 AM Dave Tedeyan 
wrote:

> Hi All,
>
> I am looking for recommendations for a solar racking system that can be
> put on a flat commercial roof where the point loads can span 12-13"
> east/west. I am imagining a system built up almost like a ground mount.
> Does anyone have manufacturer suggestions?
>
> Thanks!
> -Dave
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  Loren Ortiz - Technical Design Specialist

Board Member & Worker Owner

lo...@cal-solar.com  | www.cal-solar.coop

Office: (530) 274-3671

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Re: [RE-wrenches] Tesla Powerwalls

[Lorenzo Ortiz]

Same situation here. Supply completely dried up and we got the same, tired
excuses. Lot's of unhappy customers who point the finger at us. We have
finally started getting some shipments but nothing close to the promises we
received over a year ago.

On Tue, Jul 20, 2021 at 5:04 PM Blake Gleason 
wrote:

> Hi Marco,
>
> After installing a bunch of Powerwalls over the last few years, our supply
> from Tesla dried up completely about one year ago.  We have taken zero
> deliveries of Powerwalls in the last 12 months, with many dozens of
> customers who expected their batteries for LAST fire season and are now not
> getting their batteries in time for THIS fire season either.  We check in
> with our rep all the time, and the story is the same ("Maybe next
> quarter??") with different excuses (pandemic, unanticipated demand, chip
> shortage, etc).  We don't feel that we have any leverage, and it's
> extremely frustrating.  Predictable, but still frustrating.
>
> Best,
> Blake
>
> On Tue, Jul 20, 2021 at 1:47 PM Marco Mangelsdorf 
> wrote:
>
>> Aloha all,
>>
>> For those of you, like me, who are Tesla Certified Installers, I’m
>> curious as to 1) how well you feel you’re being adequately supplied with
>> Powerwalls and 2) whether any of you have installed their new “back up
>> switch”?
>>
>> Thanks,
>> marco
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>
> --
>
> Blake Gleason, PE | Employee Owner
> Director of Innovation and Technical Excellence
> O: 510-845-2997 x128
> C: 510-867-5878
>
> 1035 Folger Ave.
> Berkeley, CA 94710
> www.sunlightandpower.com
> License #326203
>
>  
> 
>
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Loren Ortiz - Technical Design Specialist

Board Member & Worker Owner

lo...@cal-solar.com  | www.cal-solar.coop

Office: (530) 274-3671

Fax: (530) 477-7571  CSLB #779624

Showroom: 149 E Main St. Grass Valley, CA 95945
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Re: [RE-wrenches] Is Solark UL 9540 Certified?

[Lorenzo Ortiz]

Yessir, good old California...

On Tue, Jul 20, 2021 at 11:05 AM Dave Angelini Offgrid Solar <
offgridso...@sti.net> wrote:

> Sounds like California Loren?
>
> I use Schneider and they have UL9540 certs.
>
> Here is a link to them and yes I have been asked this locally.
>
>
> https://solar.schneider-electric.com/schneider-electric-solar-and-discover-battery-attain-ul-9540-certification-for-xw-pro-and-aes-batteries/
>
>
>
> *Dave Angelini Offgrid Solar
> "we go where powerlines don't"
> http://members.sti.net/offgridsolar/ <http://members.sti.net/offgridsolar/>
> e-mail  offgridso...@sti.net 
> text 209 813 0060*
>
> On Tue, 20 Jul 2021 10:22:43 -0700, Lorenzo Ortiz 
> wrote:
>
> Wrenches,
>
> We have recently had an AHJ reject our Solark 12k system with Simpliphi
> batteries stating:
> *"Energy storage systems are required to be listed per UL 9540 per NEC
> 706.5 (See also Annex A in the NEC, under energy storage systems). The
> Sol-Ark system is not listed and tested per UL 9540 but is only listed per
> UL 1741. The complete system (ie. batteries, inverter, and any other
> components associated with the energy storage system) must be listed per UL
> 9540. Please provide documentation and certification sheets (from a
> Nationally Recognized Testing Lab (NRTL)) for both the batteries and SolArk
> inverter to show that all components are tested and certified per UL 9540.
> If it cannot be shown that the batteries are tested and listed with SolArk
> inverters per UL 9540, then such system cannot be installed and a different
> system that is listed and tested per UL 9540 must be chosen for the
> project.*
>
> Have any of you run into this with Solark? Is the plans-checker in the
> wrong about the entire system needing to meet the standard and not just the
> batteries? The code language is kind of confusing. I can't find any
> documentation on Solark's website regarding UL 9540. I know Tesla and
> Simpliphi have recently put out documentation regarding this.
>
> Thanks in advance for your help.
>
> --
>[image: California Solar Electric Cooperative]
> <https://californiasolarco.com/>
>
>
> Loren Ortiz - Technical Design Specialist
>
> Board Member & Worker Owner
>
> lo...@cal-solar.com  | www.cal-solar.coop
>
> Office: (530) 274-3671
>
> Fax: (530) 477-7571  CSLB #779624
>
> Showroom: 149 E Main St. Grass Valley, CA 95945
> [image: NABCEP] <https://www.nabcep.org/>
>
>
>
>
>
>
> <https://californiasolarco.com/quote/>
>
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<https://californiasolarco.com/>


Loren Ortiz - Technical Design Specialist

Board Member & Worker Owner

lo...@cal-solar.com  | www.cal-solar.coop

Office: (530) 274-3671

Fax: (530) 477-7571  CSLB #779624

Showroom: 149 E Main St. Grass Valley, CA 95945
[image: NABCEP] <https://www.nabcep.org/>

-- 
 <https://californiasolarco.com/quote/>
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[RE-wrenches] Is Solark UL 9540 Certified?

[Lorenzo Ortiz]

Wrenches,

We have recently had an AHJ reject our Solark 12k system with Simpliphi
batteries stating:
*"Energy storage systems are required to be listed per UL 9540 per NEC
706.5 (See also Annex A in the NEC, under energy storage systems). The
Sol-Ark system is not listed and tested per UL 9540 but is only listed per
UL 1741. The complete system (ie. batteries, inverter, and any other
components associated with the energy storage system) must be listed per UL
9540. Please provide documentation and certification sheets (from a
Nationally Recognized Testing Lab (NRTL)) for both the batteries and SolArk
inverter to show that all components are tested and certified per UL 9540.
If it cannot be shown that the batteries are tested and listed with SolArk
inverters per UL 9540, then such system cannot be installed and a different
system that is listed and tested per UL 9540 must be chosen for the
project.*

Have any of you run into this with Solark? Is the plans-checker in the
wrong about the entire system needing to meet the standard and not just the
batteries? The code language is kind of confusing. I can't find any
documentation on Solark's website regarding UL 9540. I know Tesla and
Simpliphi have recently put out documentation regarding this.

Thanks in advance for your help.

-- 
   [image: California Solar Electric Cooperative]



Loren Ortiz - Technical Design Specialist

Board Member & Worker Owner

lo...@cal-solar.com  | www.cal-solar.coop

Office: (530) 274-3671

Fax: (530) 477-7571  CSLB #779624

Showroom: 149 E Main St. Grass Valley, CA 95945
[image: NABCEP] 

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Re: [RE-wrenches] Programs for one line DWGs.

[Lorenzo Ortiz]

AutoCAD LT

On Mon, May 18, 2020 at 3:29 PM Dana Orzel  wrote:

> Hey all you wise guys!
>
>
>
> I looked back in the archives & found a few recommendations on drawing
> programs. I had Design CAD-3D for 15 years and it was simple [2D & 3D] &
> worked fine. I had to upgrade recently as this program is now out of date
> and am currently overwhelmed with too many overly complex drawing programs.
>
>
>
> I need to draw boxes, lines, text, arrows, a few curves you know the
> tasks. I don’t need to do 3D rendering of parts etc. I also need a program
> that has decent tutorials.
>
>
>
> What are you all using that is pretty basic for 2D drawings on a very
> up-to-date PC?
>
>
>
> Suffering with too many options… Thanks in advance.
>
>
>
>
>
> Dana Orzel  Great Solar Works, Inc.
>
> *C - 208.721.7003   d...@solarwork.com
> *
>
> Idaho Contractor - # 028765 Idaho PV # 028374
>
> NABCEP # 051112-136   www.solarwork.com
>
> *"Responsible Technologies for Responsible People since 1988"  *
>
> *P* Please consider the environment before printing this email.
>
>
>
>
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Technical PV Design Specialist - Worker Owner/Board Member

lo...@cal-solar.com californiasolarco.com

*Main: 530-274-3671 ext: 311 * *Fax: 530-274-7518*

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Re: [RE-wrenches] NEC 2020 not available as a portable PDF?

[Lorenzo Ortiz]

https://catalog.nfpa.org/NFPA-70-National-Electrical-Code-NEC-Softbound-P1194.aspx?order_src=G010&gclid=EAIaIQobChMI-fSc1e305gIVgtdkCh3Z0gXeEAAYASAAEgJ0nvD_BwE


On Wed, Jan 8, 2020 at 12:35 PM Christopher Warfel <
cwar...@entech-engineering.com> wrote:

> Wrenches,
>
> I was told that the NEC 2020 will not be available as a file. You can
> only access on line, or via the book.  Has anyone confirmed this?  It
> seems pretty certain.   How many times is one out in the field and needs
> to reference the NEC?  Now to do so, you will need the book or a
> connection to the Internet.  I am having a hard time believing that NFPA
> would be this short-sighted.  Chris
>
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Loren Ortiz
Technical PV Design Specialist - Commercial/Residential/Off-Grid

lo...@cal-solar.com californiasolarco.com

*Main: 530-274-3671 ext: 311 * *Fax: 530-274-7518*

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Re: [RE-wrenches] Residential tracker options

[Lorenzo Ortiz]

They're real. And pricey, ~$45k/unit.

On Wed, Oct 16, 2019 at 9:18 AM  wrote:

> Dear people:  Well, I’ve found these folks:
> https://www.allearthrenewables.com/the-allearth-solar-tracker  …but after
> several inquiries and contacting a couple of their alleged dealers, I still
> cannot get any pricing or availability information, or even if this is a
> real product.  C’est la vie!
>
>
>
> Best,
>
>
>
> Chris Daum
>
> Oasis Montana Inc.
>
> 406-777-4309 or 4321
>
> 406-777-4309 fax
>
> www.oasismontana.com
>
>
>
>
>
>
>
> *From:* Dave Angelini Offgrid Solar 
> *Sent:* Thursday, June 13, 2019 3:55 PM
> *To:* ch...@oasismontana.com
> *Subject:* RE: [RE-wrenches] Residential tracker options
>
>
>
> Hi Chris,
>
> If you find something please let us know. You are right, the old  (no
> longer made) AZ 125 from Wattsun was the best. 2KW tracked on a 6 inch
> pole. Mix that in with a ground array and you have a really nice system.
> The AZ 225 is too heavy on the 8 inch pipe without a backhoe, especially on
> a hill.
>
> *Dave Angelini Offgrid Solar*
>
> *"we go where powerlines don't"*
>
> *http://members.sti.net/offgridsolar/ *
>
> *e-mail  offgridso...@sti.net *
>
> *text 209 813 0060*
>
> On Thu, 13 Jun 2019 15:47:24 -0600,  wrote:
>
> Yes, I know what Wattsun has to offer, but some customers are looking for
> something MUCH smaller.  Thanks Dave!
>
>
>
> --Chris @ the sunny Oasis MT
>
>
>
> *From:* RE-wrenches  *On
> Behalf Of *Dave Angelini Offgrid Solar
> *Sent:* Thursday, June 13, 2019 1:11 PM
> *To:* RE-wrenches 
> *Subject:* Re: [RE-wrenches] Residential tracker options
>
>
>
> Have you looked at the Wattsun HZLA? No ladders and with the right module
> about 5KW tracked. Perfect for long hours of cooling or pumping.
> http://www.wattsun.com/products/accutrak-hzla-tracker
>
> *Dave Angelini Offgrid Solar*
>
> *"we go where powerlines don't"*
>
> *http://members.sti.net/offgridsolar/ *
>
> *e-mail  offgridso...@sti.net *
>
> *text 209 813 0060*
>
> On Thu, 13 Jun 2019 12:46:58 -0400, Dave Tedeyan 
> wrote:
>
> Chris,
>
> We have used AER for trackers. We've had good success with them.
>
> https://www.allearthrenewables.com/product/allearth-solar-trackers
>
>
>
> Cheers,
>
> Dave
>
>
>
>
>
>
>
> *From:* Glenn Burt 
> *Sent:* Thursday, June 13, 2019 12:13 PM
> *To:* ch...@oasismontana.com; 'RE-wrenches' <
> re-wrenches@lists.re-wrenches.org>
> *Subject:* Re: [RE-wrenches] Residential tracker options
>
>
>
> I see a lot of AllEarth Renewables trackers here in the Northeast.
>
>
>
>
>
>
>
> *Dave Tedeyan, PE*
>
> Senior Engineer | Taitem Engineering, PC
>
> 110 South Albany Street | Ithaca, NY 14850
>
> o. *607.277.1118 x121*  f. 607.277.2119
>
> www.taitem.com
>
>
>
> Solar • Sustainability • Energy • Design
>
> B-Corporation Best for the World 2018 Honoree
>
>
>
> On Thu, Jun 13, 2019 at 12:40 PM  wrote:
>
> Dear people:
>
> Now that Zomeworks is more-or-less down the tubes, what resources do you
> have for a residential tracking system?  Wattsun's 'one size fits all'
> really doesn't (and I don't need a need a lecture of ROI for buying more
> modules versus a tracker).  I'm just wondering if there are more options
> besides the utility grade models.  We have a great pole mount supplier –
> but some folks want a tracker.  I'm looking forward to your responses.
>
> Best,
>
> Chris
> Daum
>
>
> Oasis Montana Inc.
>
>
>
>   406-777-4309
>
>
>
>
>
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Loren Ortiz
Technical PV Design Specialist - Commercial/Residential/Off-Grid

lo...@cal-solar.com californiasolarco.com

*Main: 530-274-3671 ext: 311 * *Fax: 530-274-7518*

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Re: [RE-wrenches] Module-Level Shutdown for off grid systems

[Lorenzo Ortiz]

Thanks Mac. Yeah, Tigo was my first choice but then a search turned up this
product, the FireRaptor
<https://www.solar-electric.com/outback-power-obfrs-01-fireraptor-rapid-shutdown.html?gclid=EAIaIQobChMIzdXL_MLx5AIVFBx9Ch01vQSsEAkYASABEgIWpvD_BwE>
.
Funny name and something I haven't heard a lot about but it does allow for
a 2:1 ratio so could help save on costs.
But I'm wary to be a guinea pig for unproven tech.

These new rules, while having good intentions, are seriously impacting off
grid designs where most sites, like you mentioned, are *way* far away from
the nearest fire department. So, kind of pointless in my opinion. But I
don't make the rules...

On Fri, Sep 27, 2019 at 10:37 AM Mac Lewis  wrote:

> Hi Loren,
>
> We try to stay off the roof for off-grid in Colorado but I'm about to do
> an 8 panel, 2 string system because of a building code where this cabin is
> located.
> I talked with Tigo about it and the parts list is:
>
> 8 x's Tigo TS4-A-F for each module
> 1 x's Tigo RSS
>
> The RSS will signal the TS4s to shutdown if power is lost to the RSS.
> Included in the RSS box is a 120 Vac to 12Vdc out power supply.  However,
> since the RSS is 12 vdc (max of 1A) I'm getting a buck converter to power
> this so the inverter can be turned off in the winter time when the cabin is
> unoccupied.  The cost isn't too bad.
>
> I'll be honest though, I think this is a terrible idea.  Any communication
> box that can shut off charge to the batteries over winter at an unoccupied
> site is asking for trouble.  A communication glitch and the batteries will
> be dead.  This site is about 2 hours from the closest fire department so
> there is nothing to be gained from adding this equipment other than passing
> inspection.
>
> On Fri, Sep 27, 2019 at 11:24 AM Lorenzo Ortiz 
> wrote:
>
>> Wrenches,
>>
>> Are any of you looking ahead at solutions for module level rapid shutdown
>> for off grid? Here in CA it's being implemented next year (at least in my
>> area) and I haven't found any reliable, proven, *cost-effective*
>> products yet.
>> I know Tigo has some sort of inline component but haven't heard a lot
>> about it.
>>
>> Any input is appreciated.
>>
>> Thanks
>>
>> --
>>
>> Loren Ortiz
>> Technical PV Design Specialist - Commercial/Residential/Off-Grid
>>
>> lo...@cal-solar.com californiasolarco.com
>>
>> *Main: 530-274-3671 ext: 311 * *Fax: 530-274-7518*
>>
>>
>>
>>
>>
>> <https://californiasolarco.com/referral_form/>
>> *Showroom located at: 149 E Main St. Grass Valley, CA 95945*
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>
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>
>
>
> Mac Lewis
>
> *"Yo solo sé que no sé nada." -Sócrates*
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[RE-wrenches] Module-Level Shutdown for off grid systems

[Lorenzo Ortiz]

Wrenches,

Are any of you looking ahead at solutions for module level rapid shutdown
for off grid? Here in CA it's being implemented next year (at least in my
area) and I haven't found any reliable, proven, *cost-effective* products
yet.
I know Tigo has some sort of inline component but haven't heard a lot about
it.

Any input is appreciated.

Thanks

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Technical PV Design Specialist - Commercial/Residential/Off-Grid

lo...@cal-solar.com californiasolarco.com

*Main: 530-274-3671 ext: 311 * *Fax: 530-274-7518*

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Re: [RE-wrenches] seeking PV mounting advice to Shipping Container for Off-grid

[Lorenzo Ortiz]

Check this company out.  They have a pretty slick
solution.

On Mon, Sep 23, 2019 at 6:12 AM Chris Schaefer 
wrote:

> G'Day All,
>
> I'm looking for anyone with advice that has mounted PV to a
> shipping container roof with minimal to no roof penetrations. The container
> will not be required to be transported with PV attached, only the racking
> and only one time to project site. They will not be mounted flat but prefer
> a 35 degree angle. I was thinking of Unirac's ULA series as they use to
> have an adjustable leg. I'm not only seeking racking brands but also any,
> "if I ever did this again I would..." advice.
>
> Thanks,
> Christopher-
>
> Chris Schaefer’s
> 
>
> *Tel/Fax 585-229-2083 or Cell 585-748-1870 *
> *5115 South Hill Road ~ Canandaigua New York 14424**www.solarandwindfx.com
>  ~ E-mail: ch...@solarandwindfx.com
> *
>
>
> Thomas Jefferson, the author of our great Constitution, once said,
> "democracy" will cease to exist when you take away from those who are
> willing to work and give to those who would not."
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Technical PV Design Specialist - Commercial/Residential/Off-Grid

lo...@cal-solar.com californiasolarco.com

*Main: 530-274-3671 ext: 311 * *Fax: 530-274-7518*

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Re: [RE-wrenches] Large off-grid inverter/storage

[Lorenzo Ortiz]

Same. We've started calling our initial $100k+ proposals the 'kiss of
Death' since we tend to never hear from them again. It's a good way to weed
out those who aren't willing to spend the time/capital on a system that
will actually perform what they're asking (reliably!).

On Fri, Sep 6, 2019 at 12:07 PM Ray  wrote:

> Here in Colorado, I've been called upon to do a few design bids for
> these.  I always charge a healthy design fee to eliminate the tire
> kickers.  You can spend quite a bit of time just characterizing the loads,
> only to lose the client when they find out its going to be several hundred
> thousand dollars.
>
> Ray Walters
> Remote Solar
> 303 505-8760
>
> On 9/6/19 10:32 AM, Andrew wrote:
>
> Yeah these are for industrial cannabis operations that are starting to
> spring up due to legalization..36” industrial greenhouse fans, pre
> vegetation lighting, supplemental light and dehumidifiers… why they still
> want to do it in the middle of the boonies with now power is beyond me..
>
>
>
> Andrew Perkins
>
> Greenwired
>
> P: 707-923-2001 ext. 100
>
> 1150 #1 Evergreen Rd
>
> Redway, CA 95560
>
> www.greenwired.com
>
> [image: Description: signature]
>
>
>
>
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org
> ] *On Behalf Of *
> palumbo1...@gmail.com
> *Sent:* Thursday, September 05, 2019 7:48 PM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Large off-grid inverter/storage
>
>
>
> Is “25 Kw per hour” a real value? For us old school people there is kW and
> they is kWh (kilowatt hours). I’m guessing that it is 25 kWh per average
> day, or, about 750 KWh / month.
>
> Dave Palumbo
>
> Hyde Park, VT
>
> Sent from my iPhone
>
>
> On Sep 5, 2019, at 5:15 PM, Andrew  wrote:
>
> Hey Everyone,
>
> I have been recently been getting more and more inquiries
> for some quite large off-grid sytems(25kw per hour) and seeing what you
> guys have for suggestions on bigger inverters and storage systems?  I could
> do 2 triple stack Schneider’s and a bunch of HUPS industrial batteries but
> it all just takes up so much space and I know there are some other
> companies out there with package units. Thoughts?
>
>
>
> Andrew Perkins
>
> Greenwired
>
> P: 707-923-2001 ext. 100
>
> 1150 #1 Evergreen Rd
>
> Redway, CA 95560
>
> www.greenwired.com
>
> 
>
>
>
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Technical PV Design Specialist - Commercial/Residential/Off-Grid

lo...@cal-solar.com californiasolarco.com

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Re: [RE-wrenches] heating lithium in cold weather

[Lorenzo Ortiz]

Try heated seed mats. They seem to work pretty well if you have an
available power source nearby.
https://www.amazon.com/MT10004-Waterproof-Certified-Hydroponic-Germination/dp/B0044U4F5I


On Fri, May 17, 2019 at 8:26 AM jay  wrote:

> HI All,
>
> I”m wondering if anyone has suggestions about how to charge a Lithium
> battery in RV or in this case Polarius in sub zero temps.
>
> Are there batteries that have heaters built in, or is it still a custom
> design issue to build a heating system?
> ( insulation and heaters)
>
> Thanks,
>
> jay
>
> peltz power
>
>
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[RE-wrenches] All-In-One Off-Grid Power System-Nimbus Power

[Lorenzo Ortiz]

Anyone have any experience with these guys?
Seems like a cool product but not a lot of info out there.

Nimbus Power Systems


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Re: [RE-wrenches] Big AGM's and 24V Lithium batteries

[Lorenzo Ortiz]

Simpliphi has 24V Lithium


On Thu, Mar 28, 2019 at 1:09 PM Chris Schaefer 
wrote:

> G'Day All,
>
> Came across an older DIY 24v off-grid system. Looking to replace current
> AGM  SunXtender batteries with less then 4 years on them but severely
> abused. Client won't go for my normal Rolls/Surrette because they are very
> sensitive to smells.
>
> Thus I was considering LiFePo4 batteries however I'm having difficulties
> locating them in a 24v bank. If you know of anyone that goes that way
> please let me know.
>
> So if I'm stuck with AGM's stored indoors what brand would you suggest for
> a heavy usage (1,500 Ahrs +) home?
>
> Thanks,
> Christopher-
>
> Chris Schaefer’s
> 
>
> *Tel/Fax 585-229-2083 or Cell 585-748-1870 *
> *5115 South Hill Road ~ Canandaigua New York 14424**www.solarandwindfx.com
>  ~ E-mail: ch...@solarandwindfx.com
> *
>
>
> Thomas Jefferson, the author of our great Constitution, once said,
> "democracy" will cease to exist when you take away from those who are
> willing to work and give to those who would not."
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Re: [RE-wrenches] Anyone recognize this pole mount system?

[Lorenzo Ortiz]

Yeah, I'm pretty sure that one is an old Unirac TPM, but the one with the
adjustable screw is a mystery.

On Wed, Mar 20, 2019 at 7:12 AM Kienan Maxfield 
wrote:

> These are not MT Solar. That is certain.
>
> Thanks,
> Kienan
>
>
>
> > On Mar 14, 2019, at 2:12 PM, Timothy Econopouly <
> tim.econopo...@suncommon.com> wrote:
> >
> > They look like vintage Tamarack or MT Solar top of pole mounts
> >
> >
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Re: [RE-wrenches] Lg chem

[Lorenzo Ortiz]

They are available. We've been installing them for a while now. You need to
get "certified" as far as I know.

On Fri, Dec 14, 2018 at 7:45 AM Kirk Herander  wrote:

>
> Does anyone know when LG chem batteries for Storedge inverters are going
> to be available? I’ve heard nothing new for months thanks.
>
> Kirk Herander
>
>
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Re: [RE-wrenches] Need direct-to-decking mounting foot recommendation

[Lorenzo Ortiz]

The S-5 solar-foot attachment worked pretty well for us going into the
decking on a metal roof.
Sunmodo also makes a decking attachment option but I've never used it on a
metal roof though.

On Wed, Nov 21, 2018 at 7:59 PM William Miller 
wrote:

> Friends:
>
>
>
> I have a roof-top PV project coming up where we will need to mount some of
> our feet without benefit of screwing into rafters.
>
>
>
> This project is an addition to a previous project, and in that iteration
> we used DPW EZ-feet.  We no longer use DPW products, instead we are a
> Snap-n-Rack house.  I am researching if we could integrate the EZ-foot with
> the Snap-N-Rack, but in the meantime I’d like to ask the hive-mind for any
> recommendations on direct-to-sheeting mounting options.
>
>
>
> The roof is metal so we will screw right through the metal, into the roof
> sheeting.  We will seal with butyl sheets.  We will connect to TJI joists
> whenever possible, using longer but narrow screws, but we will fill all the
> holes on the selected hardware with the properly rated screws.
>
>
>
> Any advice is much appreciated.
>
>
>
> Thanks in advance.
>
>
>
> William Miller
>
>
>
>
>
> [image: Gradient Cap_mini]
> Lic 773985
> millersolar.com 
> 805-438-5600
>
>
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Re: [RE-wrenches] Commercial backfeed

[Lorenzo Ortiz]

Yep, all the rules still apply, But with 480 you get far more leeway as far
as breaker size with the square-root factored in.

On Mon, Nov 5, 2018 at 7:07 AM, frenergy  wrote:

> Hey folks,
>
> I've been asked to inter-tie a system to a 600 amp 480V delta
> panel.  Do all the same rules apply (Backfeed max 20%, keep inter-tie
> breaker farthest from panel grid feeders, anything else??).  Proposed
> system size is about 35-40KW.  Its actually a bazillionaire's residence.
>
> TIA
>
> Bill
>
> Feather River Solar Electric
> Bill Battagin, Owner
> 4291 Nelson St.
> Taylorsville, CA 95983
> 530.284.7849
> CA Lic 874049
> www.frenergy.net
>
>
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Re: [RE-wrenches] Raised up ground mounts

[Lorenzo Ortiz]

 We've used DPW also with good results. We design for 110 mph winds out
here and, depending on how high you go, can require some pretty beefy SCH80
8"-10"D pipe.
MT Solar might be something to look at too. They make multi-pole mounts for
larger arrays but can get a little pricey.

Good luck!


On Thu, Sep 20, 2018 at 4:55 AM, Jason Szumlanski <
ja...@floridasolardesigngroup.com> wrote:

> Any suggestions for ground mount racks where panels need to have the
> leading edge 6-8 feet above grade (due to flood level requirement)? Also,
> high wind area... 100kw system rating. Tilt can be as low as 5-10%. We're
> getting into carport territory here, but I'm trying to keep the cost
> reasonable since it won't have a dual function like a carport or shade
> structure.
>
> Jason Szumlanski
> Florida Solar Design Group
>
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Re: [RE-wrenches] Step-up/Step-down Transformer question

[Lorenzo Ortiz]

Thanks for all the input guys.  After looking at the 3 phase with
transformer options with some transformer manufacturers, that has been
pretty much ruled out due to complexity/cost.
With single phase step-up and step-down transformers, even at 600VAC, it
still requires some monster wire.
The best solution seems to be placing the inverters next to the POI and
just running long strings from the array back to the inverters and
accepting up to 4%-5% voltage drop. And that's with #8 instead of the usual
#10 AND accounting for worst-case production.

Man, sometimes this solar stuff is just crazy...

On Tue, Sep 18, 2018 at 10:15 AM, Blake Gleason 
wrote:

> Good advice already on this thread.  A couple of points to consider:
>
> 1. Re: step-up/step-down option (probably what I'd do): definitely pay
> attention to transformer spec to minimize both magnetization and operating
> losses.  Newer DOE 2016-compliant transformers are MUCH better than before,
> and that's just the minimum standard.  If you really want to minimize
> magnetization losses, you can always design a relay/timer to disconnect the
> transformers at night (from the interconnection side), although I've found
> that this setup is either very expensive or too unreliable (nuisance
> tripping upon re-connect, timer gets "off" cycle somehow, etc).
>
> 2. I think someone mentioned a 480V single-phase inverter.  I'm not aware
> of a high-quality product meeting that description.  Is there one?  All of
> the "480V" single-phase inverters I'm aware of are 277V (line to neutral),
> which is hardly worth the transformer effort (versus 240V).
>
> 3. Definitely use aluminum wire for the long run.  If wire size is still
> too large, even with step up/down tranformers, consider allowing slightly
> increased voltage drop at full power (say, 5%), and, depending on typical
> grid voltage at the site, change taps on one of the transformers to err on
> the low side (from inverters' point-of-view), to keep the inverters from
> tripping at upper voltage limit at full power (max voltage drop/rise).
>
>
> Blake
>
> On Tue, Sep 18, 2018 at 9:57 AM, Jerry Shafer 
> wrote:
>
>> Lorenzo
>> You might want to look at relocating the inverter(s) closer to the meter
>> instead of the array, one reason is even if there is some line loss at full
>> power its less as the voltage goes up and the inverter does not see the
>> line resistance that can cause high voltage issues at the inverter. Some
>> engineers use more side of peak performance than full power, this keeps
>> wite size down and does not effect output
>> Jerry
>>
>> On Sep 17, 2018 9:42 AM, "Lorenzo Ortiz"  wrote:
>>
>> Wrenches,
>>
>> We have a PV array situated about 900' from the POI (240V 1PH). We
>> initially spec'd (5) 11.4kW inverters and the combined output would be
>> 238A. The wire size required for this current over that distance is cost
>> prohibitive.
>>
>> A solution was to use a single 50kW 3 phase inverter at the array and
>> then convert it to 240V... somehow? Is anyone familiar with how to go about
>> doing this? My thought was to have a step down transformer at the POI and
>> pull off two legs to get 240V. Is this even a thing?
>>
>> The other, more expensive option is to use a step up transformer at the
>> array and a step down at the POI to get us a smaller wire size.
>>
>> Thanks for any input.
>>
>>
>> --
>> *Loren Ortiz   Commercial PV Designer*
>>
>> lo...@cal-solar.com *  (530) 274-3671*
>>
>>
>>
>> <http://californiasolarco.com/referral-program/>
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[RE-wrenches] Step-up/Step-down Transformer question

[Lorenzo Ortiz]

 Wrenches,

We have a PV array situated about 900' from the POI (240V 1PH). We
initially spec'd (5) 11.4kW inverters and the combined output would be
238A. The wire size required for this current over that distance is cost
prohibitive.

A solution was to use a single 50kW 3 phase inverter at the array and then
convert it to 240V... somehow? Is anyone familiar with how to go about
doing this? My thought was to have a step down transformer at the POI and
pull off two legs to get 240V. Is this even a thing?

The other, more expensive option is to use a step up transformer at the
array and a step down at the POI to get us a smaller wire size.

Thanks for any input.


-- 
*Loren Ortiz   Commercial PV Designer*

lo...@cal-solar.com *  (530) 274-3671*

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Re: [RE-wrenches] Bi-Directional / Netmetering question

[Lorenzo Ortiz]

 Fun fact: Sometimes the stickers on the CT's are incorrect too. Had that
happen and took forever to figure out...

On Wed, Aug 15, 2018 at 4:10 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  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-wrenches] Pro Harvest Inverters (Formerly HI-Q)

[Lorenzo Ortiz]

Wrenches,

Anyone have any experience with the Pro Harvest inverters (now branded by
Outback)?
They were previously known as HI-Q inverters I believe and they come in 3PH
208V & 480V and are super-small and light weight.

Just wondering on their reliability or any known issues since they are
relatively new.

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Re: [RE-wrenches] B3 Bypass breaker

[Lorenzo Ortiz]

How is this different/better/less expensive than just doing a supply side
tap using insulated connectors (NSI's)?

>From what I can tell, it only works on panels that are fed with wire
conductors from the meter not hard bussing, so why not just tap it?



On Thu, Feb 22, 2018 at 7:20 AM, Sam Haraldson 
wrote:

> On Wed, Feb 21, 2018 at 8:00 AM, Dana  wrote:
>
>> Has anyone used the B3 buss-bar bypass breaker setup yet? www.qfe002.com
>>
>>
> At SPI this year I spoke with one of their reps briefly and they indicated
> that after many years of trying to get the product ready it was finally
> going to be in production.  I have researched it no further than that
> however.
>
> - Sam
>
>
> --
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> Office: 406.551.6135 <(406)%20551-6135>
> s...@onsiteenergyinc.com
> onsiteenergyinc.com
>
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[RE-wrenches] S-Flex components needed

[Lorenzo Ortiz]

Wrenches,

We're looking for S-Flex mids and ends for a retrofit we are doing. S-Flex
no longer supports their ground-mount products.

Part numbers/quantities are:

*(qty 100) 702-0381 Module End-Clamp 30-50mm *
*(qty 50) 700-0155 Module Mid Clamp 30-50mm-with Bonding Clip*

Please contact me if anyone has/knows of a surplus of these pieces.

Thanks.


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Re: [RE-wrenches] Flashing for flat roofs

[Lorenzo Ortiz]

Check out Quickmount's QBase-Chem-Link standoffs. We've used them on flat
rolled comp roofs and they seem to work pretty well. Just make sure you
order the right sized diameter.

On Mon, Nov 6, 2017 at 6:25 AM, AE Solar 
wrote:

> 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] concrete roof tile install

[Lorenzo Ortiz]

We do flat tile roofs all day out here in CA. We've used these flat tile
roof hooks by Solar Roof Hooks
<https://www.solarroofhook.com/product/17540?parent=17540&id=475> to great
success.
Pull up a tile, find a rafter, pilot holes, goop, put in a hook with lags,
more goop, and then a piece of roof-flashing tape for good measure, put the
tile back and move on to the next one.
No issues with leaks so far.

On Thu, Jun 22, 2017 at 7:36 AM, jay  wrote:

> HI All,
>
> I’ve never worked with flat concrete roof tiles before.  And have an
> install that does have them.
> Something like a Striata type.
>
> Wondering what recommendations folks have for how to mount with them.  Its
> not a large system currently only 6-9 x 280 60 cell modules.
> Probably doesn’t make sense to remove/reroof in that area.  And the roof
> can handle the weight without removing the tiles.
>
> thanks in advance,
>
> Jay
> Peltz Power.
>
>
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