[RE-wrenches] Standing Seam with direct S-5 attachment & Grounding

[Carl Adams]

Wrenches,

In reviewing the archive I've seen multiple threads on S5 to module
attachment.  I did not find any discussions on module grounding on
this type of installation or any requirements for grounding the metal
roof to which the modules are attached.

It has been suggested to me that each roof pan which has a module
attached should be grounded (perhaps under the ridge cap).

Can anyone offer suggested best practice or requirements regarding this?

With Regards
Carl Adams
SunRock Solar
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[RE-wrenches] Low light panel

[Carl Adams]

Hello Wrenches,

I'm looking for a panel which will provide
0.7A at 12-20V
with only a 60 lumen light source for the irradiance source

With REgards
Carl  Adams
SunRock Solar LLC
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[RE-wrenches] Meter base minimum conductor size

[Carl Adams]

Wrenches,

We often use a conventional 100A meter base and analog meter as an
independent metering system for inverter output.  These meters
typically have a minimum conductor size of #6 AWG.  For smaller
systems the inverter output conductors are smaller than #6 AWG.  We
have upsized the conductors to match the meter base requirement, but
this adds expense.  I am looking for other suggestions for resolving
this.

With Regards
Carl Adams
SunRock Solar
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Re: [RE-wrenches] Meter base minimum conductor size

[Carl Adams]

Thanks for the responses all.  I think it's interesting that the same
type of lug is listed for smaller wire in one meter socket versus
another.  I have used Mick's suggestion in the past and I will try out
the ferrule or barrel connector on our next project.

Cheers
Carl

On Wed, Feb 9, 2011 at 10:43 PM, Kent Osterberg  wrote:
> Carl,
>
> You won't find the lugs being any different than the models that aren't
> listed for small wire, but using a meter base listed for the right wire is
> best.
> The Murray/Siemens 135-amp meter bases are listed for 14 AWG to 2/0
> http://cmsapps.sea.siemens.com/murray/murraycatalog/2008/08Murray_pdfs/08Murray_03/03_04-05.pdf
>
> Kent Osterberg
> Blue Mountain Solar
>
>
> Carl Adams wrote:
>>
>> Wrenches,
>>
>> We often use a conventional 100A meter base and analog meter as an
>> independent metering system for inverter output.  These meters
>> typically have a minimum conductor size of #6 AWG.  For smaller
>> systems the inverter output conductors are smaller than #6 AWG.  We
>> have upsized the conductors to match the meter base requirement, but
>> this adds expense.  I am looking for other suggestions for resolving
>> this.
>>
>> With Regards
>> Carl Adams
>> SunRock Solar
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[RE-wrenches] Cable tray versus RMC

[Carl Adams]

I have a project for 250kW system.  4/12 pitch standing seem roof  in
the Great Lakes snow country.   My initial proposal was to get the
source strings through the roof and inside to serviceable combiner
locations.  This was shot down by the architect who did not want 5
holes punched in his new roof.  So we then shift to pass thru Jboxes
where we transition the PV wire to THWN-2 and into RMC back to the
desired point of entry.  The electrical sub on the project has now
proposed to reduce expense by replacing the RMC with cable trays and
running USE-2 in the cable tray from the JBOX back to the point of
entry.

I'd appreciate your thoughts on the use of the cable tray and USE-2 on
the roof top.

WIth REgards
Carl Adams
NABCEP cert 031508-1
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Re: [RE-wrenches] Cable tray versus RMC

[Carl Adams]

Larry,

We do have the option of no roof penetrations and that is the course
being taken.  We will have 90 source circuits in the array and 5
Jboxes on the roof and these will then be routed to a vertical wall on
the west end of the array.  The strings will carry through the wall
horizontally and then on to the inverters.

My preference would have been to penetrate the roof with RMC and come
directly into the bottom of the NEMA 4X Jbox avoiding the long conduit
runs across the roof ( which will be visible from gorund level).  I
have used the DEKTite
(http://www.itwbuildex.com/gcs_flashings_dektite.shtml)  roof boot for
this type of penetration in the past with good success.  We use the
Eternabond double face adhesive on the bottom of the boot.  WIth the
boot fully under the JBox it will never see the light of day and
should last as long as the array.

The point of my original post was really to find out if the cable tray
approach has been used by other installers for managing the DC source
circuit wiring on rooftops.  Will it meet code?  My understanding is
that cable tray is not classified as a raceway.  It it good practice?
That sort of thing.  I personally would feel better if the source
circuits were in RMC.

Cheers
Carl



On Mon, Feb 14, 2011 at 4:37 PM,   wrote:
> Carl,
>
> I also have a job on a brand new SS metal roof and I just did not want put 
> any holes in it so I am going down the side of the building and not 
> penetrating at all. But it's only 50kW. Do you have the option of no 
> penetration? I am curious though as to what j-box/sealing/flashing set up you 
> were planning on using.
>
> Larry Liesner
> Wirewiz
> Westport, CT
> Phone: 203-644-2404
> Fax: 203-557-0556
> wire...@gmail.com
> www.wire-wiz.com
>
>
>
> On Feb 14, 2011, at 2:56 PM, Carl Adams wrote:
>
>> I have a project for 250kW system.  4/12 pitch standing seem roof  in
>> the Great Lakes snow country.   My initial proposal was to get the
>> source strings through the roof and inside to serviceable combiner
>> locations.  This was shot down by the architect who did not want 5
>> holes punched in his new roof.  So we then shift to pass thru Jboxes
>> where we transition the PV wire to THWN-2 and into RMC back to the
>> desired point of entry.  The electrical sub on the project has now
>> proposed to reduce expense by replacing the RMC with cable trays and
>> running USE-2 in the cable tray from the JBOX back to the point of
>> entry.
>>
>> I'd appreciate your thoughts on the use of the cable tray and USE-2 on
>> the roof top.
>>
>> WIth REgards
>> Carl Adams
>> NABCEP cert 031508-1
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Re: [RE-wrenches] Listed/Approved Battery Box Vent Fan

[Carl Adams]

Ben,

I would prefer to rely on gravity rather than forced circulation.  The
former has not failed to date.  Check out Allen's recent article in
Home Power magazine.  He offers some good suggestions on battery box
design and ventilation ( all passive or gravity activated) solutions.

Cheers
Carl Adams
SunRock Solar
Cinci, OH


On Fri, Feb 25, 2011 at 7:49 PM, Allan Sindelar
 wrote:
> benn,
> I'm not aware of any listed battery vents. Given the cost of listing, and
> the size of the market, it's unlikely there ever will be. Wanna pay $300 for
> a listed vent? I have never had an issue with an inspector about them.
>
> You might consider a standard AC squirrel cage fan from Grainger or some
> such, controlled by a 12V-coil relay on an FM60 or similar controller's
> auxiliary vent fan circuit. It would then only run when the batteries are
> nearly full.
>
> Other ideas? Try the approach that if there is no listed product, the
> inspector is allowed to allow a reasonable alternative. Most likely the
> batteries are also unlisted - compared to that, the vent fan is minor.
>
> I use intake vents; otherwise how can the exhaust fan work if the box is
> well sealed? The objective is to draw the hydrogen gas up and out, not just
> suck on it while it accumulates inside the box.
>
> Allan Sindelar
> al...@positiveenergysolar.com
> NABCEP Certified Photovoltaic Installer
> EE98J Journeyman Electrician
> Positive Energy, Inc.
> 3201 Calle Marie
> Santa Fe, New Mexico 87507
> 505 424-1112
> www.positiveenergysolar.com
>
> On 2/25/2011 4:55 PM, benn kilburn wrote:
>
> Good Afternoon Wrenches,
> In recommending for a client, the materials and plans for constructing a
> battery box for a 48V, 2400Ah battery, it came to my attention that the only
> battery box vent fan that i am aware of on the market (the Zeypher) is not
> UL listed, let alone approved for use in Canada.  So now i am in search of
> such a product.
>  My plans thus far are to have a well sealed box (? at least the upper
> portion of the box ?) with vent holes in the upper-most part of the box
> piped together and connecting to one outside exhaust vent.  I was planning
> on using (at least) two of the power vent fans at the top holes of the
> battery box, but after mentioning using this product to the inspector, he
> said that the vent fan would be required to bear the proper approval
> markings.
> I am still trying to determine if there should be lower 'intake' vents as
> well.
> If this power vent is not even listed, what are your feelings on using them
> in a permitted and inspected system?
> Is anyone aware of an (approved) product or method for 'power' venting a
> battery box?
> I have read some of the extensive threads here on battery boxes and have not
> found a definitive practice for venting a battery box.  I'd be happy for
> someone to point me in the right direction if i have missed something.
>  There seems to be quite a range of opinions on the need for providing a
> (lower) intake and (higher) exhaust vent.
> Thanks,
> benn
>
> DayStar Renewable Energy Inc.
> b...@daystarsolar.ca
> 780-906-7807
> HAVE A SUNNY DAY
>
>
>
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Re: [RE-wrenches] Smart Utility meters

[Carl Adams]

William,
We have run into issues with smart meters. We had a customer in one of the
pilot neighborhoods. What we saw was the meter registered his production as
consumption. Effectively doubling his consumption per the meter. After some
research it was determined that while the new smart meters were indeed net
metering capable the software back at the reporting station was not net
metering capable. Solution was to install an old dumb meter which was
bi_directionally accurate. I hope this helps.

Cheers Carl
Sunrock Solar LLC
On Mar 5, 2011 6:47 PM, "William Miller"  wrote:
> Friends:
>
> Our local utility (PG&E) is installing smart meters. These will not apply
> to interconnected customers because the meter apparently is not capable of

> two way metering.
>
> There has been a lot of controversy about smart meters regarding safety,
> accuracy and many other issues. Do any of you have any evidence that smart

> meters are a problem in any regard?
>
> Thanks,
>
> William
>
>
> Please note new e-mail address and domain:
>
> William Miller
> Miller Solar
> Voice :805-438-5600
> email: will...@millersolar.com
> http://millersolar.com
> License No. C-10-773985
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[RE-wrenches] Battery Box Labeling

[Carl Adams]

Wrenches,

Doing a quick scan of the NEC I did not find any labeling requirements
for battery boxes.  I also did not turn up anything on the list
archives either.  I'd be interested in what labeling other installers
are using.  It seems to me something should be in place for fire
fighters.  The box will contain a 500 Ah battery bank consisting of
eight AGM batteries.

Thanks
Carl Adams
SunRock Solar
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Re: [RE-wrenches] Stiebel Eltron SHW Collector condensation issue

[Carl Adams]

Dave,
I had a good conversation at the ASES conference about Stiebel Eltron with
someone I respect in the industry.   In broad strokes it was described as a
good company with good products which matches my experience. The only
negative comment from this "someone" was that their generation 1 collectors
were lousy but that their new collectors had resolved the issues.

I hope you can get the warranty replacement taken care of with out too much
hassle.

Cheers
Carl @ SunRock
On Jun 21, 2011 1:03 PM, "Solar Energy Solutions" <
solarenergysoluti...@yahoo.com> wrote:
>
> After 25 years of installing solar thermal panels, we have come to the
unfortunate conclusion that they all suck.  We have had out of the box
failures on all panels we have used... and we are a very, very, very small
company.   We pressurize our solar thermal systems to 60-80 psi and let them
sit for 3 days.  If they hold that pressure... like a ROCK, we complete the
install.  What we find, as often as not, is some little piddly leak
somewhere in the loop.  Micro holes are not an uncommon encounter in
panels.  So, we then have to wrestle the solar thermal manufacturer into
first believing their "infallible" product is leaking , "out of the
box"  and then pay, out of OUR pocket the substantial labor costs for its
replacement.  So far as I can tell, all solar thermal manufacturers warranty
their panels for 10 years.  But, they only cover $100.oo in labor costs to
replace a defective product.  This does not begin to cover our labor costs.
Consequently, I have started down the road, (without success so far) of
demanding solar thermal manufactures to stand behind their products with a 5
year $500.00 Labor warranty.  I have talked to a ton of solar thermal
manufacturers and  they all say the same thing.  "Our panels are the
best.   Our failure rate is less then 2%.  We warranty them for 10 years,
but we only pay $100.00 labor to replace those that are defective out of the
box."  I can't even get the evacuated tube guys to stand behind their
product with a decent labor warranty!
>
> Perhaps if more than one solar Bozo stands up and  says, "Enough, we want
a panel with a 5 year $500.00 labor warranty".  A manufacturer might see the
competitive edge of being the first to do so.
>
> Sincerely,
>
>
> Andrew Koyaanisqatsi
> President
> Solar Energy Solutions, Inc.
> Since 1987,
> Moving Portland and Beyond
> to an Environmentally Sustainable Future.
> 503-238-4502
> www.solarenergyoregon.com
>
> "Better one's House too little one day
> than too big all the Year after."
>
> From: August Goers 
> To: RE-wrenches 
> Sent: Tuesday, June 21, 2011 7:19 AM
>
> Subject: Re: [RE-wrenches] Stiebel Eltron SHW Collector condensation issue
>
> Hi David -
>
> Doesn't sound fun. We experienced a similar problem with a 10-collector
system with Schuco Slim-Vs about 3 years ago. The collectors had lots of
condensation build up in them, especially during the rainy season. Schuco
stepped up and gave us new 2nd generation collectors under warranty. The new
collectors do not have the condensation problem. Apparently they redesigned
the ventilation method. Generally speaking I like the Schuco product
although now we're noticing a browning effect occurring near the in inlet
and outlet pipes on the absorber plate on Slim Vs installed a few years ago.
I have yet to deal with this issue.
>
> It sounds like Stiebel is still working out their design. You'll probably
want to make sure that they have it fully figured out before replacing the
old collectors under warranty otherwise you might have the same problem!
>
> Good luck with it.
>
> Best, August
>
> From: re-wrenches-boun...@lists.re-wrenches.org [mailto:
re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dave Palumbo
> Sent: Monday, June 20, 2011 12:58 PM
> To: 'RE-wrenches'
> Subject: Re: [RE-wrenches] Stiebel Eltron SHW Collector condensation issue
>
> SHW Wrenches,
>
> Our first experience with SHW flat plate collectors with a condensation
issue on the inside of the collectors’ glass cover. The system has two
Stiebel Eltron Sol 25 collectors (88” x 48” each) with a 82 gallon single
heat exchanger insulated tank in the basement of the home, with a SOM 6
solar loop controller. System installed fall of 2008.
>
> Condensation problem was first noticed by homeowner late last December.
The collectors’ manufacturer, Stiebel Eltron, instructed us to watch and see
if the problem resolved on its own. It did not. Stiebel then instructed us
to drill small holes through the sides of the collectors near the top for
venting and more holes through the sides near the bottom for draining the
collector (see attached pdf for Stiebel’s venting advice). We did that in
early May of this year. The homeowner called us back with the same
condensation issue.
>
> Stiebel then sent a bag of plastic insert venting plugs that required us
to drill out larger holes in the side of the collectors and pop these vent
plugs in. Plugs appear to be an attempt a

Re: [RE-wrenches] shatterproof PV

[Carl Adams]

Marco,

We have a 60kW a few blocks from the shop which was installed in 2009.  It
sets on the left and center of the field.  In conversation with the
facilities manager earlier this year he said they have replaced 4 modules in
the past two seasons, and "don't let anyone tell you that PV modules will
withstand an impact from a baseball". He also noted that he get's a lot of
positive comments from the players and families who see this array every
time they are at the park. How about getting an agreement where you get to
put up a PVT Hawaii sign on the field andin exchnage you agree to replace
any modules broken due to baseball strikes.  You could consider any loss a
solar advertising fee.  Either way, my suggestion would be stock some extra
modules and plan on replacing a few.

Cheers
Carl Adams
SunRock Solar


On Wed, Jul 27, 2011 at 12:58 AM, Marco Mangelsdorf wrote:

>  I’m looking to install a 10-20 kW system on a roof that’s going to be
> getting falling foul balls from a nearby baseball field.
>
> ** **
>
> The roof is not appropriate for any of the Uni-Solar peel-n-stick products.
> 
>
> ** **
>
> Any recommendations for anything else out there that does not have a glass
> glazing?
>
> ** **
>
> Thanks,
>
> marco
>
> ** **
>
> [image: provision_highres_solar_logo2 with C-26351]
>
> Marco Mangelsdorf, President
> 69 Railroad Avenue, A-7
> Hilo, Hawai'i 96720
> (808) 969-3281, 934-7462 facsimile
> www.provision-solar.com <http://www.provisiontechnologies.com>
>
> 
>
> ** **
>
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Re: [RE-wrenches] Leaving metal roofs?

[Carl Adams]

Jesse,
Another good option is the Soladeck.  If you don't splice inside it you can
actually hide it under the array, making an uber clean look.  Seal it down
with Eternabond or similar product.

Carl
On Sep 10, 2011 7:14 PM, "Christopher Warfel" <
cwar...@entech-engineering.com> wrote:
> Many products out there. One way is to use a flashed/sealed utility
service entrance masthead. Works well if you can run the short distance from
the array to the masthead with the conductors off the roof.
>
> --- Original Message ---
> On 9/10/2011 10:10 PM Jesse Dahl wrote:All,
> 
> What have people found to be the best way to get PV conductors off a
metal roof? The last one I worked on I entered the building through the wall
using LB's.
> 
> Jesse
> 
> Sent from my iPhone
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[RE-wrenches] SMA -11 designation

[Carl Adams]

Hello Wrenches,

I see the an inverter model #
SB8000US and another
SB8000US-11

Same holds true for the 5,6,7k models.

I see this both in the SMA Sunny Design tool and on our distributors
catalog.  Can anyone tell me what the significance is?

Thanks
Carl Adams
SunRock Solar
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Re: [RE-wrenches] AC Coupling Xantrex XWInverters toEnphaseMicroinverters

[Carl Adams]

My query to Enphase on the subject and there response

Hello,



Here is a technote which talks about how to use the Xantrex XW with a grid
tied inverter.
http://www.global-download.schneider-electric.com/852577A4005D7372/all/8FA29D94B918A0FB8525781F0072FCA7/$File/ac-coupling-app-note(976-0240-01-01_rev-a).pdf

There is speculation from colleagues as to whether it would void the Enphase
warranty to AC couple an Enphase array with the XW.  That said I have an
Enphase install where the customer now would like to add batteries. Is this
solution acceptable, and if not can you offer an alternative?



With Regards

Carl Adams

SunRock Solar

513.290.9072 (cell)

513.766.6025 (office)

 ===

Hi Carl,

Battery backup is not an intended use for our inverters, should some fault
in the system cause the inverters to fail then it would not be covered by
our warranty.  Also, we don't currently have plans to support a battery
backup system, we are strictly a grid tied system and are meant to quit
producing when the grid goes down.

That's not to say that it won't work, but it definitely has a potential to
void the warranty if the inverter is used in such a way.

If you have any other questions feel free to reply to this message and I
will be happy to help you further.

Best Regards,

William Cox

Enphase Energy
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[RE-wrenches] Off Grid Alarm Communicator

[Carl Adams]

Hello Wrenches,

I had a request from a local alarm company for a small PV - Battery
system to power an alarm communicator system.  The parameters given
are as follows

12 V DC power supply to the gear
standby load 28 mA - this is the majority of the time
Operation peak load 2A for 2 minutes - once per day for communications
check and as required for alarm condition report

Have any of you provided such a system and if so could you share your
recommendations for a cost effective solution.

With Regards
Carl Adams
SunRock Solar
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Re: [RE-wrenches] BenQ AUO AC Unison modules

[Carl Adams]

David,

These used Solarbridge micros.  Sunpower has taken over support for the
micros.  Unsure about module support.

Carl Adams
SunRock Solar
NABCEP Certified PV Installer

On Nov 11, 2017 12:30 PM, "David Palumbo"  wrote:

>
> Wrenches,
> 6 years ago we put in a few systems using AC modules from BenQ AUO called
> AC unison. That product looks like it has been discontinued. Does anybody
> know if there is any support for these AC Modules and their monitoring
> device? My on line search turned up very little.
>
> Thanks,
> Dave Palumbo
> Independent Power
> Hyde Park, VT
>
> Sent from Mail for Windows 10
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Re: [RE-wrenches] Squirrel Guards for Solarworld 2.0 Frames

[Carl Adams]

Nick,

We use the SnapNRack screen and attach with SS self tapers and fender
washers.

Carl Adams
SunRock Solar
NABCEP Certified PV Installer

On Tue, May 8, 2018, 11:51 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] SI 5048 and replacement Lithium Ion battery bank

[Carl Adams]

Thanks Jerry,
Please forward any contact info you have on this product.


On Tue, Jan 7, 2020, 4:05 PM Jerry Shafer  wrote:

> Carl
> Blue planet Energy has a LFP solution that works well, the SI5048 is one
> of the units that Blue Planet has tested there batteries on and has the set
> points needed, if you are interested I can put in touch with the powers
> that be
> Jerry
>
> On Tue, Jan 7, 2020 at 9:09 AM Carl Adams  wrote:
>
>> Hello Wrenches,
>> I have a SI 5048 system installed in 2012 with Concorde PVX-4050HT AGM
>> battery bank.  The system has shut down a couple of times with low battery
>> voltage and it seems the batteries may be on their way out.  There are some
>> signs of seepage on a couple of these sealed batteries.  A few pictures
>> attached.
>>
>> System owner would like to consider a Lithium Ion replacement.  SMA
>> provided the attached list of compatible batteries.  Can any of you provide
>> your experience with these batteries or others which could work for this
>> application?
>>
>> With Kind Regards
>> Carl Adams
>> SunRock Solar
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[RE-wrenches] Renewal of SolarEdge Monitoring for cell modem

[Carl Adams]

Hello Wrenches,

I have a Solar Edge site which has a cell modem installed.  It had a 5 year
monitoring contract and that has now expired.  Anyone know what the process
is to get this extended/renewed?

With Kind Regards
Carl Adams
President, SunRock Solar
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[RE-wrenches] Direct Grid Tie Upgrade - drawing attached

[Carl Adams]

Hello Wrenches,

I have a prospect who has an existing PV system and a small wind
turbine already in place.  He is interested in adding additional
capacity via another small grid tie system.  The attached drawing
outlines the existing and proposed installation.  My question has to
do with the grid tie in.  Given the existing connections for the 2
existing DGT inverters can I connect as proposed in the drawing or
would I need to perform a line side tap on the primary feed.

Alternative suggestions appreciated.

Carl Adams
SunRock Solar, LLC


DGT Upgrade Single Line Drawing.pdf
Description: Adobe PDF document
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[RE-wrenches] Pitched EPDM Roof Attachment

[Carl Adams]

Hello Wrenches,

I have a job on a 3.5/12 pitched rubber roof.  We have 1.5” foam under
the EPDM, then the steel decking, then the purlins.  Purlin spacing
supports adequate attachment points for a conventional rail mounted
system.  I have 2 questions
1)  A typical L-foot attachment to the roof would likely compress the
underlying foam and result in divets at each foot.  What do you
recommend to disperse the load at the point of attachment
2)  What type of screw do you recommend for attaching the L-Feet to the 
purlins

With Regards
Carl Adams
NABCEP Certified Solar PV Installer
NABCEP Certified Solar Thermal Installer
SunRock Solar
Cincinnati, Ohio
513.766.6025
www.sunrocksolar.com
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Re: [RE-wrenches] Sanyo HIP 200 BA19

[Carl Adams]

Drake,

Conergy may have a few

On Tue, Sep 8, 2009 at 3:37 PM, Drake Chamberlin
 wrote:
> Hello Wrenches,
>
> Does anyone know who has Sanyo HIP 200 BA19 modules?
>
> Thanks,
>
> Drake Chamberlin
> Athens Electric
> OH License 44810
> CO License 3773
> NABCEP TM  Certified PV Installer
> Office - 740-448-7328
> Mobile - 740-856-9648
>
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Re: [RE-wrenches] SS Tek Crews

[Carl Adams]

Hello Wrenches,

Pulling up this thread from earlier in the year.  I have a couple of
upcoming jobs where I am attaching PV mounting structure  as follows
Job 1) LFoot to metal roof into Z purlin, and Job 2) FastJack to metal
roof into bar joist.

In both of the applications I'm considering the Tek screw type
attachment to the building steel.  Both the L foot and FastJack are
sized for a 5/16 - 3/8 lag or bolt.  Most of the self tappers I see
are 1/4" max diameter.  Should I be concerned about the undersized fit
of the fastener in the mounting attachment or are there large Tek type
screws out there I'm not finding?

Does anyone have pullout strengths for this type of attachment?

With Regards
Carl Adams
NABCEP Certified PV Installer
SunRock Solar, LLC

On Thu, Feb 5, 2009 at 6:51 PM, Peter Parrish
 wrote:
> Does anyone have a source for stainless steel, self tapping Tek screws? I
> could use some #10/3-4 and #10/1-1/2. If they have the little cap and
> neoprene washer that would be even better!
>
> - Peter
>
> Peter T. Parrish, President
> California Solar Engineering, Inc.
> 820 Cynthia Ave., Los Angeles, CA 90065
> Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
> CA Lic. 854779, NABCEP Cert. 031806-26
> peter.parr...@calsolareng.com
>
>
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Re: [RE-wrenches] butyl on a roll

[Carl Adams]

Wrenches,

We've used the double-sided Eternabond on metal roofs for attaching
LFeet and flashing boots.  Seems a great product for this application,
but it is a bit pricey.  I'm glad to see the other products listed
hear and Davids cost comparison.

One anecdotal evidence of the seal provided by the Eternabond, is that
we had some short lag screws mixed in our job box, and used one to
attach an Lfoot.  It did not make adequate penetration into the
structural members, and we had to to back it out  and put in the
correct (longer) lag.  The threads on the lag we backed out were so
covered with the eternabond goo that we had throw away the lag bolt
rather than fowl anything and everything that came in contact with it.

Cheers
Carl Adams
SunRock Solar
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[RE-wrenches] Solar Christmas Goodies

[Carl Adams]

Hello Wrenches,

Since year end projects are going to keep us crazy busy till year end,
I am breaking with tradition and getting started early on my Christmas
shopping.  I have a tradition in my family of giving an ornament to
each family member.  Usually something relevant to the years
experience for them.  I'd like to find some solar related Christmas
ornaments for the SunRock crew this year.  Any suggestions on where to
look would be appreciated.

Thanks and an early Merry Christmas to all.
Carl
SunRock Solar
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Re: [RE-wrenches] 2008 690.31

[Carl Adams]

Dave,

I'd be interested in seeing pictures of your work here.  We have
several ground mount systems upcoming.

Thanks
Carl


On Tue, Nov 10, 2009 at 8:51 PM, David Palumbo
 wrote:
> William,
>
>
>
> From 2008 Handbook (actual codebook is not at my desk at this time).
>
> IV. Wiring Methods
>
> 690.31 Methods Permitted
>
> (A)  Wiring Systems. All raceway and cable wiring Methods included in this
> Code and other wiring systems and fittings specifically intended and
> identified for use on photovoltaic arrays shall be permitted. Where wiring
> devices with integral enclosures are used, sufficient length of cable shall
> be provided to facilitate replacement.
>
> Where photovoltaic source and output circuits operating at maximum system
> voltages greater than 30 volts are installed in readily accessible
> locations, circuit conductors shall be installed in a raceway.
>
>
>
> Highlighted note in Handbook: Most PV modules do not have provisions for
> attaching raceways. These circuits may have to be made “not readily
> accessible” by use of physical barriers such as wire screening.
>
>
>
> It goes on with a FPN on temperatures and then continues with sections (B)
> thru (F);  which someone with the CD could paste for us.
>
>
>
> I assumed you were interested primarily in (A) William. We are using a
> screening method on DPW TPM that works well for us. We are using an outdoor
> plastic lattice, white in color, that we buy at Lowes and custom cut for our
> specific needs. We use it to screen any MC cables that are within 8 feet of
> ground level. I could send anyone interested a picture if they e-mail and
> request. To bring our wiring down from the PV modules we enter the DPW
> gimbal thru a Hubbell ¾” 90 degree cord grip (DPW has a knock out for such)
> and then we exit the steel pipe mast directly into the back of a PVC j-box
> thru a 2-1/2” hole we make in the pipe, we weld a 6x6 plate onto the hole
> for the j-box and protect the wiring coming out of the pipe mast with a
> short piece of PVC that is bushed on both ends. After the j-box we are all
> SCHD 80 PVC before transitioning to schedule 40 under ground.
>
>
>
> Dave
>
>
>
>
>
> From: re-wrenches-boun...@lists.re-wrenches.org
> [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William
> Miller
> Sent: Tuesday, November 10, 2009 6:14 PM
> To: RE-wrenches
> Subject: [RE-wrenches] 2008 690.31
>
>
>
> Friends:
>
> I have not received my 2008 NEC on CD.  Pending it's arrival, could one of
> you good folks please post 690.31 to the wrenches as a personal favor to me?
>
> Thanks in advance.
>
> William Miller
>
>
> Please note new e-mail address and domain:
>
> William Miller
> Miller Solar
> Voice :805-438-5600 Fax: 805-438-4607
> email: will...@millersolar.com
> http://millersolar.com
> License No. C-10-773985
>
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[RE-wrenches] GEPVp-200-MCA Modules Needed

[Carl Adams]

Wrenches,

Trying to match up some GE modules.  Customer currently has 22
installed and wants to add another 11 modules.

Can anyone recommend a supplier for these?

Thanks
Carl
SunRock Solar
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[RE-wrenches] 240V - 3 Phase meter needed

[Carl Adams]

Hello Wrenches,

Can anyone recommend a source for a refurbished 240V - 3 Phase meter.

Thanks
Carl
SunRock Solar
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Re: [RE-wrenches] SMA GFDI Err Tip was PV Powered vs SMA

[Carl Adams]

We have seen this error on the SMA 3000 and SMA4000 units, the 5,6,
and 7K do not seem to exhibit the problem.  The disconcerting thing to
me is that if you do nothing and just let the inverter stay ON, the
error will clear itself in about 20 - 40 minutes.  The error may clear
on the first day of service, reappear the following morning, but again
clear itself after 20 - 40 minutes.  After the initial glitch we have
had no issues with these inverters.  SMA tech support were forth right
in acknowledging the issue and dead on that no action or intervention
was required to clear it, just some burn in time.  Still a little
disconcerting, but only time will tell.

With Regards
Carl
SunRock Solar


On Thu, Dec 3, 2009 at 10:28 AM, Wayne Irwin  wrote:
> We have had the same issue with the SMA GFDI err. To fix the problem, before
> commissioning we remove the fuse, squeeze the GFDI fuse holder a little
> tighter and clean the contact ends of the fuse. Fires right up.
>
> Wayne Irwin EE
> Pure Energy Solar International Inc.
> State Licensed Solar Contractor
> License # CVC56695
> wa...@pureenergysolar.com
> http://pureenergysolar.com
> 352 377-6527 Office
> 352 336-3299 Fax
> 352 316-1637 Cell
>
> 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: atru...@gmail.com
> Date: Wed, 2 Dec 2009 21:17:54 -0500
> To: re-wrenches@lists.re-wrenches.org
> Subject: Re: [RE-wrenches] PV Powered vs SMA
>
>
>
> Last I used a PVP was in 2005 and we had multiple failures.  I've never had
> an SMA fail but there has been a disconcerting glitch on some units lately,
> where the inverter displays a GFDI fuse error for about a 1/2 hour after
> commissioning, and then kicks in.  Still the best dependabilty and fit and
> finish of any of the major inverters in my humble opinion.
>
> To me its Ford vs. BMW.  America makes some damn fine equipment but when it
> comes to precision engineering and lifetime performance I would argue that
> the Germans have an edge on the rest of the world right now.
>
>
> Andrew Truitt
> Standard Solar Inc.
>
>
>
> On Wed, Dec 2, 2009 at 9:29 AM, Drake Chamberlin
>  wrote:
>
> In the past I have seen a lot of issues with PVP inverters.  There was a
> period, when I was subcontracting, where a half dozen or more of the units
> had to be replaced within a short time.  Although I like many features of
> PVP, I've avoided them since.  Have others found these units to be reliable
> or problematic?
>
>
> At 07:30 PM 12/1/2009, you wrote:
>
> Nice thread... inverter pros/cons is something I spend a fair amount of time
> pondering, since they are the weak link in the grid-direct installation.
>
> Overall, I like them both (PVP and SMA).
>
> Performance: On page 44 of the Dec/Jan issue of SolarPro, there is a list of
> specifications for grid-direct inverters. Current PVP and SMA inverters have
> similar CEC weighted efficiency ratings. Some of the older PVP inverter
> models (1100, 2000, 2800, 3000) have slightly lower efficiency.
>
> Reliability: I like that the PVP inverters have no moving parts, whereas the
> SMA inverters use a fan to assist with the cooling. PV Powered does a lot of
> marketing around their reliability efforts, for whatever that's worth.
>
> Customer Service: I have not needed to utilize PV Powered customer service.
> I've found SMA customer service techs to be easy to reach and knowledgeable.
>
> Other issues: I like that PV Powered inverters are made in the USA. I also
> find the hardware and manuals to be easier to work with, most likely because
> they're produced in the USA for our market. The PVP inverters ship with a
> full-size mounting template which comes in handy, especially when planning
> the rough-in wiring and support framing during new construction.
>
> I have a preference for the PVP inverters, and use SMA occasionally if it's
> a better design fit. I agree with Wayne Irwin's comment about the durability
> of the inverters with the heavy transformer designs, as opposed to the newer
> "light-weight" designs (including the newest SMA products). I just feel that
> in the long run, lower counts for electronic components is a good thing. I'm
> not an expert on component reliability, but I know from my somewhat limited
> experience that capacitors dry up and transistors are susceptible to a
> variety of failure modes. The fewer of these things, the better. Also from a
> reliability standpoint, I prefer to put inverters inside in a well
> ventilated area, if possible. My gut feeling is that over the long haul, any
> inverter will be better off in a location that is protected from moisture
> and large ambient temperature swings.
>
> -Hans
> 
>
> From: re-wrenche

[RE-wrenches] 600A 240V 3Phase 3Wire Panel Needed

[Carl Adams]

Hello Wrenches,

I am in need of the following
600A 22,000 AIC
Main Lug Only Panel
240 V 3 Phase 3 wire

I am having difficulty locating one in stock at an affordable price.
Any suggestions on sourcing would be appreciated.

Glen Burt, and John McNicholas, thanks for your previous suggestions
on locating the meter.
Thanks
Carl
SunRock Solar
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Re: [RE-wrenches] Fronius IG Plus line

[Carl Adams]

Marco,

My only comment is the 3 phase units are a long lead time item.  Fronius
expects to catch up to demand by end of Q1 2010.

Carl
SunRock Solar


On Thu, Dec 17, 2009 at 6:55 PM, Marco Mangelsdorf wrote:

>  I have yet to install a Fronius IG Plus inverter.  Looking through the
> manual I’m trying to determine whether each inverter in the line, between 3
> and 12 kW, puts out three-phase power across all three poles, L1, L2 and L3
> or whether all or some of these models put out power across just one or two
> poles like the SMA Sunny Boys.
>
>
>
> I’d appreciate any education on this.
>
>
>
> Thanks,
>
> marco
>
>
>
> [image: provision_highres_solar_logo2 with C-26351]
>
> Marco Mangelsdorf, President
> 69 Railroad Avenue, A-7
> Hilo, Hawai'i 96720
> (808) 969-3281, 934-7462 facsimile
> www.provision-solar.com 
>
>
>
>
>
>
>
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Re: [RE-wrenches] Best angle - direct grid tie

[Carl Adams]

Drake,

Attached is a PDF which is the result of using PVWatts to perform an
analysis which may be helpful.

Assumption 1: No shading at the site and a due south facing array.
The module tilt is varied from 0 to 90 degrees and the array estimated
production leads you to select an optimum tilt.

Assumption 2:  Now that the optimum tilt is established evaluate the
effect of array azimuth at this tilt angle.

The solar radiation per time of day is evaluated to indicate the
potential adjustments which might be required based on shading at
various times of day but the Path Finder readings from the site should
be used for a more accurate assessment.

Cheers
Carl Adams
SunRock Solar, LLC



On Mon, Jan 4, 2010 at 6:08 PM, Ryan LeBlanc
 wrote:
> Drake,
>
> The SPA software is likely telling you 'close-to-the' optimum tilt for
> maximum total annual peak production, without telling you WHEN the most
> valuable power is produced.  That's for you to figure out based on the
> specific utility rate schedule, and is a critical factor.
>
> So, it kind of is geared towards off-grid systems, by default, but only
> because it doesn't have the Holy Grail database of utility rate schedules,
> (TOU, etc.) that we all wish was available.  Though, it may manually allow
> you some of these features.  I haven't looked at Assistant software in a
> little while, apologies.
>
> Solmetric has some resources you may be interested in,
> http://www.solmetric.com/annualinsolation-us.html.
>
> Also, perhaps you should play with PVsyst, for a large fixed ground mount,
> use the "Unlimited Sheds Option." This tool gives you some optimum
> suggestions as well, but I prefer to run a few production estimates to
> compare.
>
> Each site is specific, so be cautious if someone tells you there is an
> across-the-board answer to an optimum tilt for grid-tied applications.  For
> rooftops, you'll likely go with the orientation and tilt of the roof due to
> aesthetics and cost.  For ground mounts, we can play with it a little more
> to find our sweet spots.
>
> Ryan J. LeBlanc
> NABCEPT Certified Solar PV Installer
> Lead PV Consultant
> NATURAL ENERGY WORKS
> 2139 Westland Dr
> Santa Rosa CA 95407
> Cell: 707.591.1950
> Direct: 707.536.9839
> r...@naturalenergyworks.com
> http://www.NaturalEnergyWorks.com
>
>
>
>
>
> For your latitude, you see the same max. average yearly peak sun regardless
> of your fixed array tilted at latitude or latitude -15 degrees.
>
> See http://rredc.nrel.gov/solar/pubs/redbook/PDFs/OH.PDF.
>
>
>
> Being taught old school we always used latitude, but now I use latitude - 5
> degrees for optimal fixed tilt.
>
>
>
>
>
> Kirk Herander
>
> Vermont Solar Engineering
>
> 802.863.1202
>
> NABCEP(tm) Certified Solar Installer
>
> NYSERDA-eligible Installer
>
> VT Solar Incentive Program Partner
>
>  _
>
> From: re-wrenches-boun...@lists.re-wrenches.org
> [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake
> Chamberlin
> Sent: Monday, January 04, 2010 8:30 AM
> To: RE-wrenches
> Subject: [RE-wrenches] Best angle - direct grid tie
>
>
>
> Hello Wrenches,
>
> My Solar Pathfinder Assistant (SPA) claims that the optimum tilt angle for
> the solar modules is latitude.  I'm skeptical.  The system being designed is
> a direct grid tie, ground mount.
>
> It seems to me that an angle of latitude will give a balanced angle for both
> summer and winter charging.  Since there is far less energy available in the
> winter, is this balance really the best.  Also, a flatter angle in the
> summer should gain more hours of sun, since the sun goes N of the E-W axis.
>
>
> With ballasted systems, the 15 degree angle is supposed to work just fine,
> due to better summer charging.  Does anyone have an answer to what really is
> the optimum tilt angle for a direct grid tie system?  Is the SPA geared
> toward off grid systems, or is latitude really the best?
>
> Thank you and best wishes for the New Year,
>
>
>
> Drake Chamberlin
> Athens Electric
> OH License 44810
> CO License 3773
> NABCEP TM  Certified PV Installer
> Office - 740-448-7328
> Mobile - 740-856-9648
>
> -- next part --
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[RE-wrenches] Power Factor and Grid Tied PV

[Carl Adams]

Hello Wrenches,

Commercial power customers often are penalized for low power factors.
Looking for other info I came across this article, which seems to
cover the subject from an academic standpoint.
http://tinyurl.com/ye5pzrwDoes anyone have real world data which
might shed light on the impact of a DGT PV system on power factor.

With Regards
Carl Adams
SunRock Solar, LLC.
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Re: [RE-wrenches] Solar accumulation panel

[Carl Adams]

Andrew,

I have done this for multiple installs, most recently on a commercial
three phase 240 install (with 6 SMA 7000s) and a residential two
circuit Enphase install.  The plans were submitted to the AHJ and
approved in both cases without question.  I labeled these per 705.10
and 690.64.

The commercial install was as you suggest to simplify the grid
connection.  The residential Enphase install was done to provide a
single point of metering for the system.

I hope this helps
Carl Adams
SunRock Solar

On Tue, Jan 12, 2010 at 2:35 PM, William Miller  wrote:
> Andrew:
>
> It is not in the code.  It is an argument you make to your own AHJ.
>
> William
>
>
>
> At 10:57 AM 1/12/2010, you wrote:
>
> Team wrenches - I feel like I've seen a provision in the Code for installing
> a sub-panel to aggregate PV inverter outputs for the purpose of simplifying
> the actual grid connection (such as for a line-side tap) but I can't find it
> in 690.  I also seem to remember specific verbiage that needs to be on the
> panel along the lines of "PV circuits only.  Do not add load breakers." to
> ensure compliance with 690.64(B).  Does anyone know where I can find this
> info in the NEC?
>
>
> Andrew Truitt
> Standard Solar Inc.
>
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[RE-wrenches] Load or Line Side was Solar accumulation panel

[Carl Adams]

Wrenches,

I just had an AHJ require me to switch the load and line connections
on the fused AC disconnect which sits between the inverters (AC
Combiner panel)  and the point of utility connection.  The inverter
was connected on the LOAD side of the fused disconnect, and while the
AHJ agreed this was the safest configuration, (when the disco is OFF
the fuses are safe to remove) he insisted that the PV array should be
connected to the LINE side of the disconnect since it is supplying
power rather than acting as a LOAD.  Any similar experience or
arguments I can make based on the NEC which might help change the
position of the AHJ next time round?  I still believe our initial
installation represents the safest configuration.

Carl Adams
SunRock Solar, LLC
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Re: [RE-wrenches] Fed. 30% grant to businesses

[Carl Adams]

Wrenches,

I was just complementing the US Treasury on there swift response to
the grant application.

My customer submitted his application on the 13th of January.  We
received this response on the 26th (10 business days later).
===
From: treas1...@nrel.gov [mailto:treas1...@nrel.gov]
Sent: Tuesday, January 26, 2010 5:14 PM
To: XXX
Cc: XXX
Subject: U.S. Treasury Department - Application for Section 1603:
Application 2010E48SE001649 Issues
Thank you for submitting an application for the Department of
Treasury's Section 1603 program, Payments for Specified Energy
Property in Lieu of Tax Credits under the American Recovery and
Reinvestment Act of 2009.  In reviewing your application, we have a
request for further information.
2C. Interconnection agreement: Page 10 of the Program Guidance
indicates that an interconnection agreement is required for properties
placed in service that are interconnected with a utility.  The
interconnection agreement is a formal document between the applicant
and the local utility that establishes the terms and conditions under
which the utility agrees to interconnect with the applicant’s system.
Please provide the full-length interconnection agreement signed by the
utility and applicant.

2C. Commissioning report: Page 9 of the Program Guidance indicates
that a commissioning report is required for all properties placed in
service.   The commissioning report is a report provided by the
project engineer, or the equipment vendor, or an independent third
party that certifies that the equipment has been installed, tested,
and is ready and capable of being used for its intended purpose.
Please provide a signed and dated commissioning report.  A
commissioning report can be provided by the installer.

Our local Utility does not provide a Interconnect Agreement signed by
both parties but were happy to oblige to fulfill the Treasury
requirement.

I wrote up a brief 2 page report on our commissioning process and
signed it to fulfill the commissioning report.

These were forwarded back to Treasury on 29 January.
We received this response on 26 Feb  (20 business days later) and we
have to give them credit for three snow days in D.C. so 17 business
days later.
==

From: treas1...@nrel.gov [mailto:treas1...@nrel.gov]
Sent: Friday, February 26, 2010 3:22 PM
To: 
Cc: treas1...@nrel.gov
Subject: U.S. Treasury Department - Application for Section 1603:
Application 2010E48SE001649 Awarded

Section 1603 AWARD LETTER   

(: , Cincinnati, OH, 45209)
Re: Section 1603 Payment for Specified Energy Property in Lieu of Tax
Credits for Treasury Application Number 2010E48SE001649 – Award Notice
Dear X:
The United States Department of the Treasury (Treasury) is pleased to
inform you that the above-referenced application for payment in the
amount of ($78,579.00) for Specified Energy Property in Lieu of Tax
Credits is approved.   This payment is authorized under Section 1603
of Division B of the American Recovery and Reinvestment Act of 2009.
This notice constitutes official notification of the award and
together with your submitted application, supporting documentation,
and signed Terms and Conditions constitutes the Grant Agreement
between Treasury and you.   Acceptance of this award, including the
Terms and Conditions, is acknowledged by the awardee when funds are
accepted from Treasury.  All awards are subject to further monitoring
and audit to ensure compliance.
You should receive the payment in your bank account within five
business days of the date of this letter.  The payment will be
deposited in the bank account that is listed in the Central Contractor
Registration (CCR).

Sincerely,

Richard L. Gregg

Acting Fiscal Assistant Secretary
===

My customer received the deposit in his bank account today March 4th.
He's a happy camper!

I forgot that there was one more issue which the customer dealt with
having to do with his name not being associated with the companies
DUNS # (even though he is the majority owner and President).  I'm glad
I did not have to be in the middle of that.  I'm not sure how much
time this chewed up so subtract some days from the above wait.

While it's not lightning speed I think the response from Treasury was
reasonable, and the fact that all the documentation and correspondence
has been handled electronically, it seems to be working better than
many other government programs I am aware of.

Cheers
Carl
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[RE-wrenches] Fwd: SMA Secure Power Supply

[Carl Adams]

Hello Wrenches,

I'm considering the new SunnyBoy SB3,4,5000 TL-22-US inverters for upcoming
projects.  The new secure power supply feature seems like a good selling
point.  At this point I am most interested in field experience from those
who have already installed these units.

Here is what I have learned from reading up a bit.

My initial impression was that the electrical switch and outlet shown in
the tech bulletin, youtube video, and discussed in webinars I have seen,
was an actual "hardware product option".  This is not the case.   It is
functionality available in the unit as points of connection.  The intent is
for the installer to pickup the necessary switch and outlet at the local
supply house and make the connections.

One other thing I learned is that between early marketing and product
availability the "functionality" name was changed from "Emergency Power
Suppy (EPS)" to "Secure Power Supply (SPS)" due to NEC code issues.

Another point of confusion for me was in reading the SB3k - 5kTL
installation manual.  In the manual, the discussion of the SPS uses the
term "miniature circuit breaker".   My initial thought was this reference
was to the backfed circuit breaker for the inverter, or a separate circuit
breaker integral to the inverter.  Not the case, just bad translation from
German to English.  The reference, is to the off the shelf switch, the
installer is to use to field install the SPS.


Hope this is helpful, and again I'd like to here from those of you who have
already deployed these units.

Carl Adams
SunRock Solar
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[RE-wrenches] SMA Secure Power Supply

[Carl Adams]

Nick,

I guess I don't see this as a weakness but rather operating as designed.
 If the design intent was to allow the grid tied solar array to provide a
limited power source during a grid outage, during daylight hours, with no
batteries required, it seems this hits the mark.

I know these units went through some beta testing early this year, so I
would still appreciate any feedback  from any wrenches who have actually
installed them.

With Regards
Carl Adams
SunRock Solar

From: Nick Soleil 
Date: Fri, Jul 19, 2013 at 9:45 PM
Subject: Fwd: [RE-wrenches] Fwd: SMA Secure Power Supply
To: Carl Adams 


I understand that is a good selling point, but the major weakness is that
it won't work at night and only will provide the amount of power that is
available from the sun, so not so good for stormy conditions.

-- Forwarded message ------
From: Carl Adams 
Date: Fri, Jul 19, 2013 at 12:48 PM
Subject: [RE-wrenches] Fwd: SMA Secure Power Supply
To: RE-wrenches 




Hello Wrenches,

I'm considering the new SunnyBoy SB3,4,5000 TL-22-US inverters for upcoming
projects.  The new secure power supply feature seems like a good selling
point.  At this point I am most interested in field experience from those
who have already installed these units.

Here is what I have learned from reading up a bit.

My initial impression was that the electrical switch and outlet shown in
the tech bulletin, youtube video, and discussed in webinars I have seen,
was an actual "hardware product option".  This is not the case.   It is
functionality available in the unit as points of connection.  The intent is
for the installer to pickup the necessary switch and outlet at the local
supply house and make the connections.

One other thing I learned is that between early marketing and product
availability the "functionality" name was changed from "Emergency Power
Suppy (EPS)" to "Secure Power Supply (SPS)" due to NEC code issues.

Another point of confusion for me was in reading the SB3k - 5kTL
installation manual.  In the manual, the discussion of the SPS uses the
term "miniature circuit breaker".   My initial thought was this reference
was to the backfed circuit breaker for the inverter, or a separate circuit
breaker integral to the inverter.  Not the case, just bad translation from
German to English.  The reference, is to the off the shelf switch, the
installer is to use to field install the SPS.


Hope this is helpful, and again I'd like to here from those of you who have
already deployed these units.

Carl Adams
SunRock Solar



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-- 

Cordially,

*Nick Soleil*

*Field Applications Engineer
*

*Enphase Energy*

Mobile: (707) 321-2937


**

*Enphase Commercial Solar.*
*Limitless.*<http://www.enphase.com/commercial?utm_source=email&utm_medium=sig&utm_campaign=Comm2012>

*
*<http://www.enphase.com/commercial?utm_source=email&utm_medium=sig&utm_campaign=Comm2012>

1420 North McDowell

Petaluma, CA 94954

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

P: (707) 763-4784 x7267

F: (707) 763-0784

E: nsol...@enphaseenergy.com

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

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Re: [RE-wrenches] RE-wrenches Digest, Vol 6, Issue 276

[Carl Adams]

Corey,

For interior applications I am using the Avery 5522 Weatherproof labels
successfully on the the SMA inverters as well as other equipment.  For
external applications I use engraved plastic laminate labels from Action
Engraving. They come with a double faced adhesive back which to date has
held up very well.
Action Engraving
m...@action-engraving.com
817-504-2836
2243 Valwood Parkway Farmers Branch TX 75234

With Regards
Carl Adams
SunRock Solar

On Mon, Jul 22, 2013 at 12:46 PM, Corey Shalanski <
cshalan...@joule-energy.com> wrote:

> Our local inspector is allowing sticker-type labels, so we have begun
> printing our own with a laser printer. We found "weatherproof" sheets
> available in a variety of size configurations:
> http://www.onlinelabels.com/material_polyester_laser_labels.htm
>
> After about six months of testing they seem to be adhering alright to most
> surfaces, but we can't seem to get anything - including trophy plaques - to
> stick to SMA inverter cabinets (or any surface with a "grainy" texture)
> without using some sort of super glue. I'd be interested to hear from
> anyone who's found a successful method or product for this application.
>
> --
> Corey Shalanski
> Joule Energy
> New Orleans, LA
>
>
> On Wed, Jul 17, 2013 at 2:50 PM, Bob Ellison  wrote:
>>
>>
>> If you're using a P touch there are labels with adhesives available that
>> are non-removable and stick on real well
>> The regular labels will unpeel at some point
>> The nonremovable ones don't unpeel their labels and hold their colors
>> very well especially inside a box
>>
>> Opening a box and finding five labels laying on the bottom isn't pleasant!
>>
>
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Re: [RE-wrenches] Enphase failures

[Carl Adams]

Marco,

Here is a summary of our experience with Enphase to date
  13.1%  overall failure rate  25.6%  M190 failure rate  25.0%  D380
failure rate  2.1%  M210 failure rate  5.6%  M215 failure rate

We have had two full site upgrades last year.  One from M190s - 215s, the
other from D380s to M215s.  No problems at those sites since the swap out.
We have two other M190 sites in line to be swapped for 215s once the 90 day
monitoring period is up.

Just swapped 3 of 15 inverters on a site last week.  When I showed up with
the 3 new inverters two more had died, they are now enroute from Enphase.
Those failures are reflected in the above statistics.

With Regards
Carl Adams
SunRock Solar



On Fri, Aug 2, 2013 at 10:29 PM, Marco Mangelsdorf wrote:

>  What are you all seeing as far as failure rates for the Enphase M215s?***
> *
>
> ** **
>
> I’ve got a contractor friend on O’ahu who installed a 60-mod system (using
> the M215s) and has had failures with nine of the buggers, leading to a
> rather unhappy homeowner.
>
> ** **
>
> While my contractor friend has had some level of support from our Enphase
> friends, he has gone back to the site many times and is wondering at what
> point Enphase would authorize replacing the whole kit and caboodle of all
> them thar micros.
>
> ** **
>
> Anyone have anything similar happen?
>
> ** **
>
> Finally, are you seeing access yet to the new M250?
>
> ** **
>
> Thanks,
>
> marco
>
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Re: [RE-wrenches] SMA E-Panel and Inverter OCPD

[Carl Adams]

boB,

I see and understand the functionality of the input-output bypass switch
(breakers).  The other breaker labeled "Sunny Boy(s) Input"  in the drawing
and labeled "Grid Tie Inverter" on the unit, seems to provide a single OCPD
for the combined input of the two inverters.  The SB 5000 has a maximum
output current of 22A and the SB3000 a 15A max output.  Seems we should
have output breakers on each inverter circuit prior to connection to the
SMA E-panel busbar.

It seems there are a couple of options.
1) A small AC combiner panel with a suitably sized  breaker protecting each
inverter and #6 conductors run from the  AC combiner to the SunnyBoy input
bus bar in the E-panel.  The 60A OCPD ("grid Tie Inverter") in the E-panel
protecting this circuit.
2) Two suitably sized AC breakers installed on the extra DIN rail on the
right hand side of the E-panel and output of these breakers feeding the
busbar.
3) Run #6 conductors from the E-Panel Sunny Boy Input Busbars back to each
inverter output circuit, and let the 60A "Sunny Boy(s) Input" breaker
provide the OCPD for both inverters.  Not sure this option passes muster
with a single OCPD protecting two devices.

I hope that clarifies the question.

Thanks
Carl

On Mon, Sep 16, 2013 at 4:32 PM, b...@midnitesolar.com
wrote:

>
> Carl, there are actually 2 (two) Sunny Island AC load output breakers.
> One set is in the AC input-output bypass switch and the other are
> separate breakers so you can turn off the inverter output.
>
> The Sunny Boy outputs also go through a 2-pole circuit breaker.
>
> What OCPD are you referring to ?
>
> boB
>
>
>
>
> On 9/16/2013 12:31 PM, Carl Adams wrote:
>
> Hello Wrenches,
>
>  We are installing our first Midnite Solar E-panel for SMA.  The epanel
> has a bus bar for landing the inverter  output circuits.  The attached
> diagram from Midnite does not include any OCPD in the circuit, but it seems
> to me these will be required .  We'll be installing an SMA SB3000TL and
> SB5000TL.  Have any of you installed this SMA E-Panel configuration before
> and if so how did you handle this piece of it?
>
>  Thanks in Advance
> Carl Adams
> SunRock Solar
>
>
>
>
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[RE-wrenches] Safely inducing arc fault and ground fault in a completed array

[Carl Adams]

Wrenches,

We just completed an install with the SMA STP12000TL-US.  I would like to
induce two fault conditions into the system 1) ground fault, and 2) arc
fault, in a manner that is both safe to equipment and personnel, in order
to see how these units respond to those conditions, and in particular how
the arc fault is cleared, after detection. (assuming it is detected)

Any suggestions appreciated.

With Regards
Carl Adams  NABCEP 031508-1
SunRock Solar
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Re: [RE-wrenches] Low slope membrane roof attachment

[Carl Adams]

Don,

Thanks for the pointer to SNapNRack.  We like their racking for residential
systems, but have not used the 4 hole standoff kit.  So on a white membrane
roof what is used to seal the roof cone flashing to the membrane, and what
is the height of the roof cone flashing.  It seems the cone height will
determine the minimum standoff shaft height.

You mentioned you don't use the other hardware.  Are just attaching an
LFoot to the top of the post?

With Regards
Carl Adams  NABCEP 031508-1
SunRock Solar
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[RE-wrenches] UPS disturbance with SMA Inverters

[Carl Adams]

Hello Wrenches,

I have a site which is experiencing nuisance disturbance of the computer
UPS systems at the site.  The site owner "suspects" this is due to the PV
system which is a 50 kW system using 6 SMA SunnyBoy inverters.  The
nuisance disturbance is a clicking noise in the UPS units.  The disturbance
is not enough to cause the UPS to engage, so it seems to be a small
disturbance on the AC power.   The site owner "suspects" the inverters are
the source of this disturbance since 1) It seems to only occur when we have
a good solar day.  2) If the inverters are shut down the problem goes away,
and if you start up the inverters the problem exhibits again.

The site was commissioned in March of 2012 and has had no problems till
this issue last month.  In reviewing the event log on Sunny Portal there
are no inverter anomalies.  SMA tech support had not run into this issue
and had no ideas, they too agree the inverters are not reporting any
anomalies.

The problem is not persistent but rather intermittent making this harder to
troubleshoot.

So my questions are
1) Has anyone else seen this sort of issue before, related to SMA SunnyBoy
inverters.
2) Can you recommend an AC power monitoring tool which would support
 frequency and voltage monitoring on the AC line.  Perhaps one data set on
the circuit feeding the computers and another on the inverter output
circuit.

For clarity the six SunnyBoys feed into an AC Combiner panel which backfeeds
into the building main distribution panel.  The service is 240V single
phase.

With Regards
Carl Adams, SunRock Solar
NABCEP Certified PV Installer
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Re: [RE-wrenches] UPS disturbance with SMA Inverters

[Carl Adams]

Bob, Ray, Glenn,

Thanks for the responses.  We could cycle through the inverters and see if
it is one, or some combinations of inverters, which is causing the problem.
 This results in a minimum of 6 trials.  If it is a combination of
inverters  many more.

Any feedback on the idea of monitoring the AC circuits; computer feed and
combined inverter output?  Seems to me this might provide a one step
correlation between the event and the cause.  Just not sure what equipment
to suggest for this.

Could be there is some other cause, unrelated to the inverters.  AC unit
kicking on, etc.  Though they do not see any lights dimiming/brightening,
or any other notable change in electrical equipment at the sight.



On Mon, Aug 4, 2014 at 1:03 PM, Glenn Burt  wrote:

>  I wonder if the UPS is grumbling about high voltage as the inverters
> push back current...
>
> Glenn
>  --
> From: Carl Adams 
> Sent: ‎8/‎4/‎2014 10:29
> To: RE-wrenches 
> Subject: [RE-wrenches] UPS disturbance with SMA Inverters
>
> Hello Wrenches,
>
> I have a site which is experiencing nuisance disturbance of the computer
> UPS systems at the site.  The site owner "suspects" this is due to the PV
> system which is a 50 kW system using 6 SMA SunnyBoy inverters.  The
> nuisance disturbance is a clicking noise in the UPS units.  The disturbance
> is not enough to cause the UPS to engage, so it seems to be a small
> disturbance on the AC power.   The site owner "suspects" the inverters are
> the source of this disturbance since 1) It seems to only occur when we have
> a good solar day.  2) If the inverters are shut down the problem goes away,
> and if you start up the inverters the problem exhibits again.
>
> The site was commissioned in March of 2012 and has had no problems till
> this issue last month.  In reviewing the event log on Sunny Portal there
> are no inverter anomalies.  SMA tech support had not run into this issue
> and had no ideas, they too agree the inverters are not reporting any
> anomalies.
>
> The problem is not persistent but rather intermittent making this harder
> to troubleshoot.
>
> So my questions are
> 1) Has anyone else seen this sort of issue before, related to SMA SunnyBoy
> inverters.
> 2) Can you recommend an AC power monitoring tool which would support
>  frequency and voltage monitoring on the AC line.  Perhaps one data set on
> the circuit feeding the computers and another on the inverter output
> circuit.
>
> For clarity the six SunnyBoys feed into an AC Combiner panel which
> backfeeds into the building main distribution panel.  The service is 240V
> single phase.
>
> With Regards
> Carl Adams, SunRock Solar
> NABCEP Certified PV Installer
>
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Re: [RE-wrenches] Conduit supports on sloped composite shingle roofs

[Carl Adams]

Chris,
You might consider the DPW EasyFeet. They mount to comp shingles with five 
course thread torques screws. Kind of a wide L foot.
 
http://dpwsolar.com/images/PDFs/ApplicationInformation/Easy_Feet_Installation_Guidelines_Version_1_Rev_E.pdf
 You can come off of that with a piece of DPW P6 aluminum channel or square 
aluminum rail and then mount stainless steel mini for conduit supported at any 
height you wish.  Lead time on the easy feat is sometimes long. 

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

On Sep 22, 2014, at 7:57 PM, Chris Mason  wrote:

In a hurricane region, we can't use glued supports.
Caddy supports are for flat roofs. These are 30 degree roofs.
I think I am going to use unistrut with two holes bored in it, washered screws 
and sealant, and a HDG conduit clamp.




> On Mon, Sep 22, 2014 at 7:49 PM, August Goers  wrote:
> Hi Chris,
> 
>  
> 
> There are a few common methods to run conduit along the roof surface.
> 
>  
> 
> 1.   Blocks made of Trex or another similar wood substitute with conduit 
> fastened with 1-hole straps. Trex is typically only glued to the roof with 
> roofing sealant (no penetrations)
> 
> 2.   A more professional support such as the Chem Link KnuckleHead: 
> http://www.chemlink.com/index.php/chemlink-products/knuckleheads or Erico 
> Caddy: http://www.erico.com/public/library/Fixing/LT1058.pdf  - there are 
> other manufacturers as well
> 
> 3.   Quickmount classic conduit comp mount: 
> http://www.quickmountpv.com/downloads/datasheet/QMPV-datasheet-QMCC-Conduit-web.pdf
> 
>  
> 
> For residential projects we typically use Trex. For commercial projects we 
> typically use the Erico Caddy. If the roof is really steep and the blocks 
> won’t stay put then we use the Quickmount product.
> 
>  
> 
> For getting through the roof we typically use a standard pipe flashing or a 
> SolaDeck.
> 
>  
> 
> Best,
> 
>  
> 
> August
> 
>  
> 
> Luminalt
> 
>  
> 
> From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On 
> Behalf Of Chris Mason
> Sent: Monday, September 22, 2014 2:43 PM
> To: RE-wrenches
> Subject: [RE-wrenches] Conduit supports on sloped composite shingle roofs
> 
>  
> 
> I'm curious what methods people are using to mount, flash and stand-off 
> conduit from the comp. shingle roofs. We don't do a lot of shingle, mostly 
> metal and concrete, so we are less that familiar with the options. We used 
> SnapNRack flashed mounts for the rail system, but they need a rafter under 
> them and the conduit run will not be above rafters.
> 
> As it is very hot here, I want to get some air between the conduit and the 
> roof.
> 
>  
> 
> --
> 
> Chris Mason
> 
> NABCEP Certified Solar PV Installer™
> 
> Solar Design Engineer
> 
> Generac Generators Industrial technician
> 
>  
> 
> www.cometsolar.com
> 
> 264.235.5670
> 
> 869.662.5670
> 
> Skype: netconcepts
> 
> 
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-- 
Chris Mason
NABCEP Certified Solar PV Installer™
Solar Design Engineer
Generac Generators Industrial technician

www.cometsolar.com
264.235.5670
869.662.5670
Skype: netconcepts
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Re: [RE-wrenches] Modules over vents

[Carl Adams]

Bruce,
We routinely cut off DWV as suggested by earlier posts so that they are at 
least 1 inch below the surface of the back of the module.

To be clear these are sewage intake air vents and not exhaust vents for heating 
appliances. 

We do place a quarter inch wire cloth over the cut off vent and apply a four 
inch stainless steel hose clamp around the pipe just to prevent foreign objects 
from entering the vent pipe. 

I have never had an inspector question this method. 

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

On Sep 24, 2014, at 1:37 PM, Ray Walters  wrote:

I agree with Kurt: you need a licensed   plumber in your area to advise 
you, if you're trying to keep the AHJs happy .
2nd,  I'm very sure you don't want an exhaust/ combustion type vent under the 
array.  I've had several over the years, and seen some arrays installed over 
them.  They can get fairly hot and put quite a bit of steam out.  I would not 
trust the module backing material to a concentrated long term dose; which 
module is going to have a problem first?   
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer, 
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 9/24/2014 11:16 AM, Kurt Johnsen wrote:
> Should you decide to lower your plumbing vents I have found an inside pipe 
> cutter to be an inexpensive and handy tool. Cut the vent and lead off an inch 
> above your desired pipe height and use the inside cutter to cut the pvc pipe. 
> Go slow and be careful to keep air space between the pvc and lead as the lead 
> will cut very easily.
> 
>  
> 
> Also I wouldn't rely on us well intentioned wrenches to make the call on the 
> plumbing code in your jurisdiction. Though the state plumbing codes are 
> usually based on the international code, there will be differences. If you 
> can't pull up your state plumbing code online then ask your plumbing 
> inspector. In Florida the minimum height above a roof surface is 6" (904.1). 
> As for relocating 905.2 states that “all vent and branch vent pipes shall be 
> so graded and connected as to drain back to the drainage pipe by gravity”. 
> Table 710.1(1) shows that for 1.5” pipe a slope of ¼” per foot is sufficient 
> to handle 3 fixtures. I would take that to indicate ¼” / foot is plenty for a 
> 1.5” vent.
> 
> 
>> On Wed, Sep 24, 2014 at 11:20 AM, Dave Click  wrote:
>> Flipping through the '04 plumbing code I see a few slopes called out (1/4" 
>> per 1' for fixture vents, 1" per 1' for circuit vents, 1/2" per 1' for 
>> combination drain/vent...). Fixture vents have a maximum distance of a few 
>> feet from fixture trap to vent, but I don't think this prevents you from 
>> then running that vent horizontally. 916.2 states that for vents other than 
>> stack vents or vent stacks if your vent is >40' you need to upsize the whole 
>> vent pipe (tough to do for an existing building, of course). Stack vents 
>> have a "maximum developed length" of 100' for a 1.5" vent which should be 
>> enough space to get away from under the PV. I don't see any slope 
>> requirements specifically for stack vents but my non-plumber's eye may be 
>> missing something.
>> 
>> The stack vent sizing Table 916.1 appears (in part) here too and it looks 
>> like the tables match up to a 2.5":
>> http://www.engineeringtoolbox.com/drainage-vents-d_1110.html
>> 
>> DKC
>> 
>> 
>> 
>> 
>> On 2014/9/24 10:19, Jason Szumlanski wrote:
>>> I am unable to find anything in the Florida code that precludes covering a 
>>> plumbing vent. The code does require the vent to be 6" above the roof 
>>> surface I believe.
>>> 
>>> I was unable to determine if these vents need to be vertical with no bends 
>>> in the attic. Obviously you wouldn't want to create a trap in the attic, 
>>> but a couple of 45's to relocate a plumbing vent to accommodate more PV 
>>> seems like a desirable thing to do sometimes. Does anyone know if these can 
>>> be relocated, i.e. to an adjacent roof surface?
>>> 
>>> On my own home I had a vent to deal with. I broke out my saws-all, split 
>>> the lead like a banana and peeled it back, cut the pipe at an angle, and 
>>> folded the lead back into the pipe after applying sealant between the lead 
>>> and pipe. There is a 1" gap between the rim of the pipe and the back of the 
>>> module. My theory on this   working safely is that, 
>>> a) there will be far less rainwater falling in and around this pipe with a 
>>>

Re: [RE-wrenches] tax credit carryover

[Carl Adams]

My CPA said that for residential customers, the credit could be carried
forward until the year the credit expires (2016)

Carl Adams
NABCEP Ceritifed Solar Installer
Sunrock Solar

On Tue, Feb 10, 2015 at 12:54 PM, Kristopher Schmid 
wrote:

> I am interested in the answer to your question, Kirk.  If you find it
> somewhere other than on this thread, can you please let me know.  I have
> heard 5 years, but not from a CPA.
>
> Thanks,
> Kris
>
> On Sat, Feb 7, 2015 at 2:43 PM, Kirk Herander  wrote:
>
>> What is the length of carryover for the Federal tax credit (individual)?
>> It’s clear in the tax code a business has a one year carry back & 20 year
>> carry forward. For the residential, it seems to indicate only a 1 year
>> carry forward, but not explicitly stated. Thoughts? Thanks.
>>
>>
>>
>> *Kirk Herander*
>>
>> *VT Solar, LLC *
>>
>> *Proven PV provider since 1991*
>>
>> *www.vermontsolarnow.com <http://www.vermontsolarnow.com>*
>>
>> dba Vermont Solar Engineering
>>
>> NABCEPTM Inaugural Certificant
>>
>> VT RE Incentive Program Partner
>>
>> 802.863.1202
>>
>>
>>
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>
>
> --
> Shine On!
>
> Kris Schmid
> Legacy Solar, LLC
> 864 Clam Falls Trail
> Frederic, WI 54837
> www.legacysolar.com
> 715-653-4295
> NABCEP Certified PV Installer
> Licensed Wisconsin Master Electrician
> BSEE
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[RE-wrenches] Yingli modules

[Carl Adams]

I have a customer who insists he must have Yingli modules. So far I can't find 
them in distribution anywhere. Anyone have a source?

With Regards
Carl Adams, President
SunRock Solar
513.290.9072 (cell)
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Re: [RE-wrenches] Yingli modules

[Carl Adams]

Thanks Kevin. I'll check them out

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

On Feb 16, 2015, at 8:44 PM, Kevin Eigel  wrote:

HI Carl:

You could try Focused Energy for the the Yingli modules.

Kevin Eigel
Ecohouse Solar
614-805-5776

> On Mon, Feb 16, 2015 at 7:30 PM, Carl Adams  wrote:
> I have a customer who insists he must have Yingli modules. So far I can't 
> find them in distribution anywhere. Anyone have a source?
> 
> With Regards
> Carl Adams, President
> SunRock Solar
> 513.290.9072 (cell)
> 513.766.6025 (office)
> 
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-- 
Kevin Eigel
President & Owner
Ecohouse Solar
www.ecohousesolar.com
1857 Northwest Blvd., Ste. 201
Columbus, OH 43212
614-805-5776
 
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Re: [RE-wrenches] Yingli modules

[Carl Adams]

Thanks for the tips.  Focused Energy is carrying the Poly 255 Yingli black
frame white backsheet.  Conergy referred me to Soligent and they are not
carrying the Yingli brand.  Rumor is the Panda mono from Yingli are not
available in the US.  Can anyone confirm this rumor?

Cheers
Carl Adams
NABCEP Certified PV Installer
SunRock Solar

On Tue, Feb 17, 2015 at 12:08 PM, Benn Kilburn 
wrote:

> You can check with Conergy.
>
> Benn Kilburn
> SkyFire Energy Inc.
> 780-906-7807
>
>
> On Feb 16, 2015, at 5:30 PM, Carl Adams  wrote:
>
> I have a customer who insists he must have Yingli modules. So far I can't
> find them in distribution anywhere. Anyone have a source?
>
> With Regards
> Carl Adams, President
> SunRock Solar
> 513.290.9072 (cell)
> 513.766.6025 (office)
>
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[RE-wrenches] Fwd: 72 cell Mono modules needed

[Carl Adams]

Hello Wrenches,

I am looking for a good tier 1 module for an upcoming project.  The
architect has speced mono crystalline modules in the 300w - 325w range,
approximate size 77" x 40".  Any recommendations on a product and supplier
would be appreciated.

With regards
Carl Adams
NABCEP Certified PV Installer
SunRock Solar
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Re: [RE-wrenches] Discrepency between inverter kWH reading andsolar production meter

[Carl Adams]

Kevin,
My experience with inverter based kilowatt hour readings is that they are
always optimistic. My experience with SolarEdge shows the SolarEdge
kilowatt hour reading runs about 2 percent higher then the utility grade
meter. I have found similar discrepancies with SMA , Fronius and other
inverter manufacturers.

Carl Adams
President, SunRock Solar
mobile 513.290.9072
On May 22, 2015 8:39 PM, "frenergy"  wrote:

>  Hopefully there tech department can shed some light on this for you,
> however, it would certainly be to SolarEdge's benefit to appear to be
> producing more power than it really is, well, unless, H ..
>
> Bill
>
>
> - Original Message -
> *From:* jarmo.venalai...@schneider-electric.com
> *To:* RE-wrenches 
> *Sent:* Friday, May 22, 2015 4:00 PM
> *Subject:* Re: [RE-wrenches] Discrepency between inverter kWH reading
> andsolar production meter
>
> Hi:
>
> The difference is in the accuracy of revenue grade versus inverter KWh
> meters.  Revenue grade is typically much more accurate.
>
> Beyond that, even if the accuracy of both was really good at lets say +/-
> 0.5%, you could still get a 1% overall difference in readings as one could
> be +0.5% and other -0.5%, even though they are both working to spec.
>
> JARMO
>
> _
>
> *Jarmo Venalainen*  |  * Schneider Electric **  |  Xantrex Brand*  |
> *CANADA*  |   *Sales Application Engineer*
> *Phone:* +604-422-2528  |   *Tech Support:* 800-670-0707  |   *Mobile:*
> +604-505-0291
> *Email:* *jarmo.venalai...@schneider-electric.com*
>   |   *Site:** www.Xantrex.com*
> <http://www.xantrex.com/>  |   *Address:* 3700 Gilmore Way, Burnaby, BC
> V5G4M1
>   <http://www.xantrexrebate.com/>  <http://www.xantrex.com/>
> <https://www.facebook.com/Xantrex> <https://twitter.com/Xantrex>
> <https://twitter.com/Xantrex>
>
>
> *** Please consider the environment before printing this e-mail
>
>
>
>   From: Kevin Eigel  To: RE-wrenches <
> RE-wrenches@lists.re-wrenches.org>,  Date: 05/22/2015 02:38 PM Subject: 
> [RE-wrenches]
> Discrepency between inverter kWH reading and solarproduction meter 
> Sent
> by: "RE-wrenches" 
> --
>
>
>
> I recently installed a Solaredge 7600 inverter and two feet away from it
> installed a GE 210 solar kWh utility grade meter. Over the course of three
> months the kWh production measured by the inverter is more than 200 kWh
> greater then the production showing on the GE meter. I  changed out the GE
> meter for the last week and the discrepancy has continued, so it looks like
> it is not the meter.
> I am looking for any help in understanding whey there is this large
> discrepancy on the kWh reading between the inverter and the production
> meter, when they are so close together. The Solaredge technical help desk
> has been of no use.
>
> --
> Kevin Eigel
> President
> Ecohouse Solar
> 1857 Northwest Blvd. Ste 201, Columbus, OH 43212
> www,*ecohousesolar.com* <http://ecohousesolar.com/>
> 614-805-5776
>
> __
> This email has been scanned by the Symantec Email Security.cloud service.
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Re: [RE-wrenches] SnapNrack

[Carl Adams]

We standardized on snap and rack about 3 years ago as well. Previous to
that we used a number of systems unirac, iron Ridge etcetera.

Good hardware and easy to assemble.  We recently installed our first Snap
and Rack residential ground mount. That installed very nicely and it priced
out better than the UNIVRAC ULA.

The online configurator for the residential ground mount has a few bugs. A
call to snap and rack tech support resolved the issues and they ran the
configurations thru their internal tools to verify measurements.  They were
very accessible and helpful in their response.

Carl Adams
President, SunRock Solar
mobile 513.290.9072
On Jun 24, 2015 9:43 PM, "jerrysgarage01"  wrote:

> Wrenches
> For the more traditional roofs we use unitary products but we use the iron
> ridge
>
>
> Sent via the Samsung Galaxy S™ III, an AT&T 4G LTE smartphone
>
>
>  Original message 
> From: Dana
> Date:06/24/2015 12:09 PM (GMT-10:00)
> To: 'RE-wrenches'
> Subject: Re: [RE-wrenches] SnapNrack
>
> After many years of UniRac we switched to SnapnRack. We have never had to
> wait for product. AEE ships within 48 hours (usually) there are lots of
> options for different roofs and they all seem to work well. Flush mount
> rail is the same for ground mount. We have “custom” over engineered racks
> at 10,000 ft.el., many times that were like doing erector sets on a roof
> and are so stout that it is wonderful. Service has been excellent with
> question & suggestions. I am sold can you tell?
>
> Flush mount is a an easy install too check out their online design &
> components *www.**snapnrack**.com/* <http://www.snapnrack.com/>
>
>
>
>
> 
>
> Dana Orzel
>
> Great Solar Works, Inc -  NABCEP # 051112-136
>
> E - d...@solarwork.com  - Web - solarwork.com
>
> O - 970.626.5253  C - 208.721.7003
>
> "Responsible Technologies for Responsible People since 1988"
>
> *P* Please consider the environment before printing this email.
>
>
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
> Behalf Of *Dana Brandt
> *Sent:* Wednesday, June 24, 2015 3:56 PM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] SnapNrack
>
>
>
> Hi Jason,
>
> We've used Unirac for years but have been contemplating Ironridge. I'm
> curious what your experience was and why you went back to Unirac?
>
> Anyone else have input on best racking systems for flush-mounted
> residential systems on comp roof?
>
> Thanks,
>
>
> Dana
>
> Dana Brandt
> Ecotech Energy Systems, LLC
> www.ecotechenergy.com
> d...@ecotechenergy.com
> 360.318.7646
>
>
>
> On Wed, Feb 5, 2014 at 12:09 PM, Jason Szumlanski 
> wrote:
>
> By Snap N Rack, you mean Sun Run...
>
>
>
>
> http://cleantechnica.com/2014/02/05/sunrun-acquires-rec-solars-residential-business-aee-solar-snapnrack-means/
>
>
>
> I'm curious if these vertical integrators will still make their acquired
> brands available to small dealers through distribution. When SolarCity
> snatched up Zep, I had concerns about being able to service or add onto
> existing Zep systems we installed. That's definitely a concern going
> forward, and reason to perhaps stick with the most compatible racking
> solutions available. We used IronRidge for a while, which is largely
> compatible with Unirac, but now we're back on the Unirac bandwagon.
>
>
>
> Interesting times...
>
>
>
> Jason Szumlanski
>
> ​Fafco Solar​
>
>
>
>
>
> On Wed, Feb 5, 2014 at 12:45 PM, Max Balchowsky  wrote:
>
> We have been using Snap N' Rack for a while, Have lots of installs in
> Hawaii - so far no problems, I like the convenience of the design for
> snapping in the slider nut in mid rail, and also the ability to install the
> panels flush with the end of the rails….
>
>
>
> Max Balchowsky
> Design Engineer
> SEE Systems
> 1048 Irvine Ave Suite 217
> Newport Beach, Ca. 92660
> 760-403-6810
>
> "Building a Better Future For The Next Generation"
>
>
> --
>
> *From:* Allen Frishman 
> *To:* RE-wrenches 
> *Sent:* Wednesday, February 5, 2014 6:17 AM
> *Subject:* Re: [RE-wrenches] SnapNrack
>
>
>
> I am curious about the mid clamps on the snapnrack.   The flange that
> rests on top of the solar panel frame is so small ~ 3/16".Anyone
> experience any problems with these failing in a big storm?With solar
> panel frames not being square it is nice to have a little extra to grab - I
> am always curious as to why 

[RE-wrenches] Outback Optics RE

[Carl Adams]

Hello Wrenches

I am interested to see if any of you have the Outback Optics RE up and
running.  I attended a seminar recently and they could not demo it.  I have
watched the canned demo on the website, but the engineer in me has a
problem with canned demos vs. live demonstrations.

Any field experience would be appreciated.

Carl Adams
NABBCEP Certified PV Installer
SunRock Solar
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Re: [RE-wrenches] Can anyone identify this mounting system and module

[Carl Adams]

Thanks for the responses.

On Thu, Oct 22, 2015 at 12:27 PM, Nick Soleil 
wrote:

> That is the Andalay/Westinghouse Solar system.  They can be reached at:
> http://www.andalaysolar.com/
>
> On Thu, Oct 22, 2015 at 7:59 AM, Carl Adams  wrote:
>
>> I have not been onsite but was sent some photos.  This system needs
>> removed for reroofing.  I am not familiar which this mounting
>> hardware/module.  Pictures attached.
>>
>> Thanks
>> Carl Adams
>> SunRock Solar
>>
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>>
>
>
> --
>
> Cordially,
>
> Nick Soleil
> *Enphase Energy* | Field Applications Engineer
>
> office 707-763-4784 <%28707%29%20763.%204784> x7267
> cell 07-321-2937
>
> <http://enphase.com/>
>
> *Powering What’s Next*™* | *The Enphase Energy Management System
> <http://ow.ly/HbVS3>
> <http://community.enphaseenergy.com/>  <http://facebook.com/EnphaseEnergy>
>   <http://twitter.com/Enphase>
> <http://linkedin.com/company/enphase-energy>
>
>
> NABCEP Certified Solar PV Installer #03262011-300
>
> California C10 Licensed Electrician #986315
>
> Texas Master Electrician #284451
>
> 
>
> “Don’t get me wrong: I love nuclear energy! It’s just that I prefer fusion
> to fission. And it just so happens that there’s an enormous fusion reactor
> safely banked a few million miles from us. It delivers more than we could
> ever use in just about 8 minutes. And it’s wireless!”
>
> - William McDonough
>
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[RE-wrenches] Mage Solar US Support contact

[Carl Adams]

Hello Fellow wrenches,

I have a couple of failed Mage solar AC modules.  These are Mage Solar
panels with an integrated Solardridge inverter.  Anyone have a good contact
number for Mage Solar US Support, or do I need to call Germany?

Thanks
Carl Adams
SunRock Solar
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Re: [RE-wrenches] Mage Solar US Support contact

[Carl Adams]

SunPower support team evaluated the two failed inverters via the web
interface and agreed to send out two replacement inverters

Carl Adams
On Oct 25, 2015 8:35 AM, "William Dorsett"  wrote:

> Carl, I wondered what would happen to other AC module manufacturers using
> these inverters after SolarBridge sold to SunPower. They were always
> warrantied through the module manu.
>
>
>
> Bill Dorsett
>
> Manhattan, KS
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
> Behalf Of *Kurt Johnsen
> *Sent:* Friday, October 23, 2015 11:38 AM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Mage Solar US Support contact
>
>
>
> wolfgang.beaugr...@magesolar.com
>
> Kurt Johnsen
>
>
>
> On Thu, Oct 22, 2015 at 8:52 PM, Carl Adams  wrote:
>
> Hello Fellow wrenches,
>
>
>
> I have a couple of failed Mage solar AC modules.  These are Mage Solar
> panels with an integrated Solardridge inverter.  Anyone have a good contact
> number for Mage Solar US Support, or do I need to call Germany?
>
>
>
> Thanks
>
> Carl Adams
>
> SunRock Solar
>
>
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[RE-wrenches] Source Circuit Disconnect - 690.14 (C)(1)

[Carl Adams]

Fellow Wrenches,

We recently failed an inspection on a new PV installation
We are operating under the 2008 code
I have attached a small sketch of our conduit routing to clarify things.

Inspectors note post inspection ...provide a photovoltaic disconnecting
means per 690.14 (C)(1)

During his inspection the inspector was unhappy that we had entered the
attic space with the DC source circuits, saying we should have run the
conduit across the roof and kept it outside.  Since we entered the building
we would need to add a DC disconnect in the attic to meet code.  My thought
is that we fall under the exception listed (690.31(E)) since all source
circuit internal to the dwelling are in metallic raceways.  I'd like to
hear other wrenches chime in on this.

Our reason for routing things as we did was to keep the installation
aesthetics first class and minimize unsightly conduit runs.

Code section follows

690.14 Additional Provisions. Photovoltaic disconnecting
means shall comply with 690.14(A) through (D).690.14

(C) Requirements for Disconnecting Means. Means
shall be provided to disconnect all conductors in a building
or other structure from the photovoltaic system conductors.
(1) Location. The photovoltaic disconnecting means shall
be installed at a readily accessible location either on the
outside of a building or structure or inside nearest the point
of entrance of the system conductors.
Exception: Installations that comply with 690.31(E) shall
be permitted to have the disconnecting means located remote
from the point of entry of the system conductors.
The photovoltaic system disconnecting means shall not
be installed in bathrooms.

 690.31 (E) reads as follows
(E) Direct-Current Photovoltaic Source and Output
Circuits Inside a Building. Where direct-current photovoltaic
source or output circuits of a utility-interactive inverter
from a building-integrated or other photovoltaic system are
run inside a building or structure, they shall be contained in
metal raceways, or metal enclosures, from the point of penetration
of the surface of the building or structure to the
first readily accessible disconnecting means. The disconnecting
means shall comply with 690.14(A) through (D).


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


DC Source Conduit Run.pdf
Description: Adobe PDF document
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Re: [RE-wrenches] Solar Edge Optimizer failures

[Carl Adams]

Lena,

We've been installing the Solar Edge product for a few years now and are
experiencing good reliability.  I think we have had 2 optimizers which were
DOA from the factory.  One was completely dead the other had a 25% reduced
output.  No problems with warranty replacements.

With Regards
Carl Adams, SunRock Solar

On Fri, Jan 8, 2016 at 12:07 PM, Lena Wilensky 
wrote:

> We've had a strange set of recurring failures from one Solaredge install.
> It's a straightforward 5kw system with 20 x REC 255W modules and P300-5 SE
> optimizers.
>
> System was commissioned in 11/2014 and ran fine for about 6mo.  At that
> time one optimizer failed - gave module short circuit voltage on the
> optimizer output when disconnected from the rest of the array.  Nothing
> visibly wrong.  Rest of the array worked fine.
>
> About 3mo later (this past august), 2 more optimizers failed.  We gave
> Solaredge an earful, but they were only willing to send replacements for
> the 2 newly failed units and 2 spare optimizers for future failures.  Same
> failure apparently with high output voltage from the optimizer when
> disconnected from the array.  They said they had never heard of this
> happening multiple times and would do an optimizer autopsy.
>
> We just had another one fail 2 weeks ago.  They apparently tested the 2
> failed ones from august and found no water intrusion on the optimizer or
> connectors.  This is all the testing they can do in the US for these potted
> units.  They recently sent the failed units to Israel to test them, but
> don't expect results for at least 6mo or more.  Solaredge claims they've
> never seen anything like this and so far they have refused to send
> replacements for the rest of the "good" optimizers in the array claiming
> that the optimizers may not be the issue.  Really?
>
> Anyone heard of or seen any "batch" failures of these optimizers?  Or have
> a good contact at Solaredge?  I'm about ready to swap in an SMA inverter at
> this point, and stay away from module level anything from now on.  We're
> going to have to triple our prices to pay for all this warranty work, as
> Solaredge only gives $25/optimizer and $100/incident to "help" with labor
> costs.
>
> Thanks for any insight
> Lena Wilensky
>
> www.nunatakenergy.com
> 970-349-3432
> NABCEP Certified PV Installer:
> Cert. #R02907-17
>
>
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Re: [RE-wrenches] SIP W/ metal roof

[Carl Adams]

Drake,

We've use DP&W Easy Feet for this application.

Carl Adams
SunRock Solar
NACEP Certified PV Instsller
On Apr 11, 2016 12:09 PM, "Drake" 
wrote:

> Hello Wrenches,
>
> What is the best solution for fastening arrays to SIP construction? This
> is a metal roof. I have information on EcoFasten for shingle roofs.  What
> is the best solution for metal roofs?
>
> Thanks you,
>
> Drake
>
> Drake Chamberlin
>
>
>
>
>
> *Athens Electric LLC OH License 44810 CO License 3773 NABCEP Certified
> Solar PV 740-448-7328 <740-448-7328> *http://athens-electric.com/
>
>
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[RE-wrenches] SolarEdge comm card failures

[Carl Adams]

Hello Wrenches,

Anyone experiencing issues with comm card failures on SolarEdge inverters?
We have some systems installed  in 2012 exhibiting similar behaviors.  The
systems are producing data, it is registering on the inverter, and our
independent utilty meter, but is not reported to the SolarEdge portal.
Next day(s) it reports production to the portal but the missing data is
never filled in.  I have attached a small graph from the portal dashboard.

Typically if a network connection goes down, and then is restored the data
should be uploaded after the connection is back on line.  In this case
their remains a hole in the data, for that day, indicating that data was
never uploaded.

We had one system which exhibited this "missing data" symptom on accasion
over a 2 month period of time.  This was diagnosed, as a failing comm
card.  Once that was replaced we have not seen the issue recur for that
site.  But now we are seeing similar behavior from three other sites, all
installed a in the second half of 2012.

Just wondering if anyone else has encountered this.

Thanks
Carl Adams
SunRock Solar

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Re: [RE-wrenches] SolarEdge comm card failures

[Carl Adams]

Howie,

Thanks for your response.  I would agree that we have not seen this problem
with systems installed after 2012.   The technology has improved, and the
Comm card in the inverter has been thru several iterations since then.  I
would also agree that SE has improved on their tech support response time
this year and the "with the paint by numbers" description of tech support
response.  Based on my limited experience, I surmised a failing
communications card in the inverter.  I had a hell of a time convincing SE
tech support this was the issue.

We were on site troubleshooting this today and after checking that we could
ping Google from the inverter connection, and establish a TCP connection to
the SolarEdge server via the laptop on that connection, and trying to step
thru the inverter programming with a non responsive push button interface,
the SE tech agreed to send us a new comm card.  But only after rolling a
truck, jumping through a few hoops on the phone with SE support, did we get
that agreement.  I felt like most of this troubleshooting was above what I
could expect of most field  techs, without significant computer experience.

Note this is the card which contains the digital display for the inverter,
and the one which interfaces with the push button display on the inverter.
This is not an add-on accessory. One other symptom of this problem is that
the push button interface for scrolling through the SE inverter menus is
intermittent in its response.  You may push the button multiple times
before you get a response on the screen.  Same behavior if you use the push
buttons under the front cover of the inverter.  Another symptom is that the
 indicator does not display on the first  and sixth display screens.
  indicates the unit is unable to connect to the Solar Edge portal.

I have two other sites which exhibit similar symptoms; missing data reports
to the portal on random days in the past few months.  The inverters are
working fine but the data is not being uploaded to the portal on some
days.  I asked SE for a part number for the comm card so I could stock a
spare.  Unfortunately they were unable to provide a part number, which I
could order from my distributor and take to the site to troubleshoot these
sites.  Apparently these are only supplied after you jump through enough
hoops with tech support.  I found this aggravating to say the least.

I hope this is helpful.

With Kind Regards
Carl Adams
SunRock Solar

On Mon, Apr 18, 2016 at 2:26 PM, Howie Michaelson 
wrote:

> Carl,
>
> We experienced a rash of Comm Card issues with several SE installs over
> several years, but none exactly as you describe.  Our issues were almost
> all resolved with a board replacement, but a few were particularly vexing
> with many return service calls to get a resolution.  We seemed to have the
> most problems with the single phase 10k inverters.  In general, SE tech
> support was helpful, although a bit paint-by-numbers at times, as well as
> very slow to answer for much of 2015.  As best I can tell, the issues have
> begun to settle down most recently.
> Howie
>
> *Howie Michaelson*
> *NABCEP Certified Solar PV Installer™*
> Sun Catcher, LLC
> Renewable Energy Systems Sales and Service
> VT Solar Electric Incentive Partner
> 802-272-0004
>
> On Mon, Apr 18, 2016 at 11:34 AM, Carl Adams 
> wrote:
>
>> Hello Wrenches,
>>
>> Anyone experiencing issues with comm card failures on SolarEdge
>> inverters?  We have some systems installed  in 2012 exhibiting similar
>> behaviors.  The systems are producing data, it is registering on the
>> inverter, and our independent utilty meter, but is not reported to the
>> SolarEdge portal.  Next day(s) it reports production to the portal but the
>> missing data is never filled in.  I have attached a small graph from the
>> portal dashboard.
>>
>> Typically if a network connection goes down, and then is restored the
>> data should be uploaded after the connection is back on line.  In this case
>> their remains a hole in the data, for that day, indicating that data was
>> never uploaded.
>>
>> We had one system which exhibited this "missing data" symptom on accasion
>> over a 2 month period of time.  This was diagnosed, as a failing comm
>> card.  Once that was replaced we have not seen the issue recur for that
>> site.  But now we are seeing similar behavior from three other sites, all
>> installed a in the second half of 2012.
>>
>> Just wondering if anyone else has encountered this.
>>
>> Thanks
>> Carl Adams
>> SunRock Solar
>>
>>
>> <https://www.avast.com/en-us/lp-safe-emailing-2109?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=oa-210

Re: [RE-wrenches] Failure Modes Solar Edge

[Carl Adams]

Mac,

I have not encountered that failure mode. Typically only the module
attached to that Optimizer is out of production if the optimizer fails.

I would second Howie's comment about using the online alerts. They will
alert for Optimizer, string, or inverter failure, sending you an email if
anything goes wrong.  We typically set up the customer and our monitoring
email account to receive these alerts.

Carl Adams
SunRock Solar
NACEP Certified PV Instsller
On May 2, 2016 10:00 AM, "Howie Michaelson"  wrote:

> Mac,
> That outs not the typical type of failure in my experience. Usually, an
> optimize failure just takes out the one module's production, although I
> have seen a couple of failures that either disable the whole string or even
> the inverter. If you establish communications with the SE monitoring
> portal, then you can get error warnings that would appraise you of a
> variety of problems, including any production issues.
> Howie
>
> Howie Michaelson
> NABCEP Certified Solar PV Installer™
>
> Sun Catcher
> Renewable Energy Systems Sales and Service
> VT Solar Electric Incentive Partner
> 802-272-0004
> On May 2, 2016 8:44 AM, "Mac Lewis"  wrote:
>
>> Hello Wrenches,
>>
>> I just got the chance to work on my first Solar Edge system.  We were
>> performing a service call on a system that another contractor installed and
>> is now out of the business.
>>
>> One of the power optimizers had failed.  No big deal, but I was surprised
>> it knocked out the entire string.  For this system, about 35% of the array
>> had sat been unproductive for over a year because this customer hadn't paid
>> attention.
>>
>> If an optimizer goes down, does it always knock out the whole string?  Or
>> are there different modes of failures that allow the string to keep
>> producing.  Is this common type of failure?  If so, it seems like there is
>> still a significant advantage to the parallel architecture with a trunk
>> cable.
>>
>> Thanks
>>
>> --
>>
>>
>>
>> Mac Lewis
>>
>> *"Yo solo sé que no sé nada." -Sócrates*
>>
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[RE-wrenches] MAGE AC modules

[Carl Adams]

Hello Wrenches,

I installed some Mage AC modules a few years back. These use the
SolarBridge micro inverter.  I have had a couple of these fail and would
like to have one in stock for trouble shooting.  I currently have one which
appears to be failed based on the online data, but according to SunPower
support I need to go onsite check all connections and measure all voltages
and then call them with data to get the RMA started.  They tell me I cannot
buy a spare to pop in while I am there, as I am not a SunPower dealer.  If
any of you have one of these you would part with contact me off list.

With REgards
Carl Adams
SunRock Solar
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[RE-wrenches] 20 kW 208/120 inverters

[Carl Adams]

Hello Wrenches,

I am looking of a recommendation on a 208 3 phase inverter in the 20 kW
range.  Any suggestions?

Carl Adams
SunRock Solar
NABCEP Certified PV Installer
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Re: [RE-wrenches] 20 kW 208/120 inverters

[Carl Adams]

Jason,

It looks like the 14k is 208/120V but the 20TL is 277/480

Carl Adams
SunRock Solar
NABCEP Certified PV Installer

On Mon, Jun 13, 2016 at 2:15 PM, Jason Szumlanski <
ja...@floridasolardesigngroup.com> wrote:

> Solectria PVI 20TL would meet your criteria. I can't vouch for it
> personally, but I've seen quite a few 14TL successfully installed in
> commercial applications.
>
>
>
>
> On Mon, Jun 13, 2016 at 2:08 PM, Carl Adams  wrote:
>
>> Hello Wrenches,
>>
>> I am looking of a recommendation on a 208 3 phase inverter in the 20 kW
>> range.  Any suggestions?
>>
>> Carl Adams
>> SunRock Solar
>> NABCEP Certified PV Installer
>>
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Re: [RE-wrenches] 20 kW 208/120 inverters

[Carl Adams]

Jason, Howard,

I could certainly use multiple smaller inverters.  I was just looking to
see if there was a larger 208 inverter available.  Seems the upper limit on
the 208Y/120V inerters is at about 14kW.  One larger inverter is almost
always less expensive than two smaller ones in terms of initial expense and
installation labor.

Thanks for your suggestions
Carl Adams
SunRock Solar
NABCEP Certified PV Installer



On Mon, Jun 13, 2016 at 4:16 PM, Jason Szumlanski <
ja...@floridasolardesigngroup.com> wrote:

> You're right. They share the same installation an user manuals, so I
> assumed they were the same output voltage.
>
> Is there a reason you can't use a pair of 10kWs?
>
>
>
> On Mon, Jun 13, 2016 at 4:09 PM, Carl Adams  wrote:
>
>> Jason,
>>
>> It looks like the 14k is 208/120V but the 20TL is 277/480
>>
>> Carl Adams
>> SunRock Solar
>> NABCEP Certified PV Installer
>>
>> On Mon, Jun 13, 2016 at 2:15 PM, Jason Szumlanski <
>> ja...@floridasolardesigngroup.com> wrote:
>>
>>> Solectria PVI 20TL would meet your criteria. I can't vouch for it
>>> personally, but I've seen quite a few 14TL successfully installed in
>>> commercial applications.
>>>
>>>
>>>
>>>
>>> On Mon, Jun 13, 2016 at 2:08 PM, Carl Adams 
>>> wrote:
>>>
>>>> Hello Wrenches,
>>>>
>>>> I am looking of a recommendation on a 208 3 phase inverter in the 20 kW
>>>> range.  Any suggestions?
>>>>
>>>> Carl Adams
>>>> SunRock Solar
>>>> NABCEP Certified PV Installer
>>>>
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Re: [RE-wrenches] SolarEdge 7600 and the Powerwall

[Carl Adams]

Marco,

Are the two switch gear boxes integral to the installation.  If so can you
give me an idea of what their function/purpose is?

On Mon, Jun 13, 2016 at 9:20 PM, Marco Mangelsdorf 
wrote:

> Provides an idea of size and scale.
>
> [image: Tesla Battery system Aalto residence2. 6 may 2016]
>
> From left to right—disconnect, kWh meter, SolarEdge 7600, switch gear, two
> Tesla Powerwalls.
>
>
>
>
>
>
> --
>
> 
>
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Re: [RE-wrenches] SolarEdge 7600 and the Powerwall

[Carl Adams]

Chris,

Nice finish on the Sonnen install.  It looks fabulous.  My understanding is
the Eco 2-8 integrate the 4kW radian, and the 10-16 incorporates the 8kW
radian.  I assume generator support is fully supported

On Fri, Jun 17, 2016 at 8:35 AM, Chris Mason 
wrote:

> I promised a picture of the Sonnen installation. As these units are
> getting close to being appliances in the same vein as home audio, we wanted
> to have a clean finish so we made some mill work to complete the top of the
> unit to the ceiling and hide the ugly conduits.
> https://www.dropbox.com/s/vlh0uumlgf5549g/2016-06-15%2011.00.44-1.jpg?dl=0
>
> On Thu, Jun 16, 2016 at 3:47 PM, Marco Mangelsdorf 
> wrote:
>
>> Dunno exactly, Carl.
>>
>>
>>
>> Twas not I who installed it.
>>
>>
>>
>> marco
>>
>>
>>
>> Marco,
>>
>>
>>
>> Are the two switch gear boxes integral to the installation.  If so can
>> you give me an idea of what their function/purpose is?
>>
>>
>>
>> On Mon, Jun 13, 2016 at 9:20 PM, Marco Mangelsdorf 
>> wrote:
>>
>> Provides an idea of size and scale.
>>
>> [image: Tesla Battery system Aalto residence2. 6 may 2016]
>>
>> From left to right—disconnect, kWh meter, SolarEdge 7600, switch gear,
>> two Tesla Powerwalls.
>>
>>
>>
>>
>>
>>
>> --
>>
>>
>> 
>>
>> This email has been checked for viruses by Avast antivirus software.
>> www.avast.com
>> 
>>
>>
>>
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>
>
> --
> Chris Mason
> NABCEP Certified Solar PV Installer™
> Solar Design Engineer
> Generac Generators Industrial technician
>
> www.cometsolar.com 
> 264.235.5670
> 869.662.5670
> Skype: netconcepts
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Re: [RE-wrenches] Sonnen Battery & Outback Radian Inverter

[Carl Adams]

Drake,

Pricing is for the package, for Eco 2-8  you get the Radian 4kW plus the
kWh batteries specified.  For the Eco 20 - 16 you get the Radian 8kE plus
the kWh batteries specified.  Here is a price sheet.  Installer cost would
be MSRP - 15% plus shipping.
Reading the link, I'm not sure what the following sentence refers to, the
price of the system or the batteries.



*"The batteries are priced at $10,000 for the 4 kWh model up to $24,000 for
the 16 kWh model." *Literally it says that the cost is $10K for 4 KWh
batteries. When compared to the $24K system cost for a system 4 times as
big, it would seem that they are referring to whole system costs with the
same equipment but more batteries.

They wouldn't sell 4 times as many batteries for 2.4 times the cost (would
they)?

If it is 4 kWh of batteries alone for $10K, that wouldn't be much of a
deal, even if they did last 10 years. We are doing *far* better than that
with AGM, which should last 7 years. If it is for the entire system, it
might start looking competitive.

At 09:54 PM 6/17/2016, you wrote:

Enclosed is a photo of what appears to be a test/lab Sonnen system
published in the 01/30/2016 edition of "Power Magazine.

Can plainly see the 8kW Outback Radian inverter and I assume four 12V
Sonnen (Sony?) 8kWh Lithium-Ion batteries. Assume this is a "standard" 48V
Radian inverter.

http://www.powermag.com/german-battery-firm-sonnen-moves-into-u-s-home-solar-storage-market/

Regards,

Gary Willett

Icarus Engineering LLC
[image: []]

On 6/17/16 2:09 PM, Chris Mason wrote:

Yes, correct on both. The generator support is there, I did not use it.

On Fri, Jun 17, 2016 at 3:07 PM, Carl Adams  wrote:
Chris,

Nice finish on the Sonnen install.  It looks fabulous.  My understanding is
the Eco 2-8 integrate the 4kW radian, and the 10-16 incorporates the 8kW
radian.  I assume generator support is fully supported

On Fri, Jun 17, 2016 at 8:35 AM, Chris Mason < cometenergysyst...@gmail.com>
wrote:
I promised a picture of the Sonnen installation. As these units are getting
close to being appliances in the same vein as home audio, we wanted to have
a clean finish so we made some mill work to complete the top of the unit to
the ceiling and hide the ugly conduits.
https://www.dropbox.com/s/vlh0uumlgf5549g/2016-06-15%2011.00.44-1.jpg?dl=0


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160202-Price-list-sonnenBatterie-eco_l.pdf
Description: Adobe PDF document
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Re: [RE-wrenches] Add-On to DGT, string inverter, w/Different Modules on 2nd string

[Carl Adams]

Ash,

I'd look at the Solar Edge 5000 inverter with P300 optimizers or the SMA
5000TL.  Either way you end up with two strings, one old and one new.  Less
work with the SMA route.  Better performance with the SE. With the SE route
the owner could actually see the performance improvement on the older SW175
string.  The owner can find a new home for the old inverter on EBAY

Carl Adams
SunRock Solar
NABCEP Certified PV Instsller
On Jun 21, 2016 6:13 PM, "Jerry Shafer"  wrote:

> I have 12 sharp 72 cell and that only 444 voc so that should not be an
> issue, yes l know he has SW but they are very close
> Jerry
> On Jun 21, 2016 10:31 AM, "Brian Teitelbaum" 
> wrote:
>
>> Hi Ash,
>>
>>
>>
>> Are you sure that there are 12 of the SolarWorld 175’s on a single string?
>>
>>
>>
>> Those were 72-cell modules, and I would think that having 12 in series in
>> CO would see open-circuit voltages over 600 VDC at least on some occasions.
>> That’s 864 cells in series, with would be about equal to having 14.4
>> typical 60-cell modules in series. That sounds too high to me for CO.
>>
>>
>>
>> One option would be to reduce the number of 175’s to 10 (720 cells in
>> series) and match them with 12 of the 60-cell modules (also 720 cells in
>> series). The older modules are 5” cells, so their amperage would be lower,
>> but as long as you get the voltage as close as possible it should be fine.
>> Of course, this doesn’t account for degradation, so you may want to do some
>> actual voltage measurements on the old modules.
>>
>>
>>
>> One thing though – since twelve 280W modules is about 3360W, and you have
>> a 3kW inverter, there really isn’t enough room to add. The older Sunny Boys
>> had a much narrower MPPT voltage range, so I doubt that you could use
>> strings shorter than nine 60-cell modules. I don’t see how you would be
>> able to add much to the old inverter anyway. Adding a second inverter
>> system may be your only option, unless you can find some used 175’s. 18 or
>> 20 of the 175’s, in two strings, should work fine on the 3kW Sunny Boy.
>>
>>
>>
>> Brian Teitelbaum
>>
>> AEE Solar
>>
>>
>>
>>
>>
>> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
>> Behalf Of *Ash Bowersock
>> *Sent:* Tuesday, June 21, 2016 12:48 PM
>> *To:* re-wrenches@lists.re-wrenches.org
>> *Subject:* [RE-wrenches] Add-On to DGT, string inverter, w/Different
>> Modules on 2nd string
>>
>>
>>
>> Good day RE Wrench crew,
>>
>> I’ve got a client whom installed a 2kW array with a 3kW SunnyBoy inverter
>> a number of years back. Due to the age of the system I assume it is single
>> MPPT. The client oversized his inverter in the hopes of using it for this
>> future expansion (and unfortunately his installer went along with it). The
>> original modules were 12 SolarWorld 175’s I believe, and we would be
>> looking at adding SolarWorld 280’s more than likely. To me it is clear that
>> this is poor design practice and not something I am willing to do. My
>> recommendation is a micro-inverter system that we tie in w/his existing
>> using an AC Combiner. But the client wants to know exactly why we don’t
>> want to just add a second string of 12 SolarWorld 280’s to his 6 year old
>> SunnyBoy inverter.
>>
>> Can someone please give me a technical reason why mixed modules on a
>> string inverter is “poor design practice”?
>>
>> The more technical and dry an explanation, the better ;)
>>
>> If you can’t convince them, bore them to tears with the details.
>>
>>
>>
>> Ash Bowersock
>> Senior System Designer
>>
>> [image: RGS Energy] <http://www.rgsenergy.com/>
>>
>> 833 W. South Boulder Road | Louisville, CO 80027
>> tel 303.222.8387
>>
>> *RGSEnergy.com* <http://www.rgsenergy.com/>
>>
>> *Confidentiality Note: *This e-mail message may contain confidential or
>> legally privileged information and is intended only for the use of the
>> intended recipient(s). Any unauthorized disclosure, dissemination,
>> distribution, copying or the taking of any action in reliance on the
>> information herein is prohibited. E-mails are not secure and cannot be
>> guaranteed to be error free as they can be intercepted, amended, or contain
>> viruses. Anyone who communicates with us by e-mail is deemed to have
>> accepted these risks. RGS Energy is not responsible for errors or omissions
>> in this message and denies any responsibility for any damag

[RE-wrenches] Rapid ShutDown Requirement

[Carl Adams]

Hello Wrenches,

I am working on a ballasted roof mount system.  46 kW using four roof
mounted Fronius 10.0-3 208V inverters.  The system consists of 4 sub-arrays
with one inverter for each sub array.  Discussing the rapid shutdown
requirements with a colleague he said if we keep the inverters located
within 10 ft of the array we do not need to add any rapid shutdown
devices.  The inverter AC ouput disconnects would satisfy the requirement.

Does that match your understanding?

Thanks in advance
Carl Adams
President, SunRock Solar
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Re: [RE-wrenches] Protecting Asphalt Shingled Roofs

[Carl Adams]

Our crew wear CougarPaws boots when working on asphalt shingles.  Very
gentle on the roof and added traction is a great safety improvement on
steeper pitches.  They seem to run 1/2 to 1 size larger than the normal
boot for most of the crew.
https://www.cougarpaws.com

Carl Adams
SunRock Solar
NABCEP Certified PV Installer

On Jul 30, 2016 3:04 AM, "Chris Worcester"  wrote:

> We get enough garden hose up to the roof to be able to spray down our work
> area quickly, about every 15 minutes during the heat waves. It can almost
> be a full time job for one person. I hadn’t thought about a mister/drip
> system….hmmm…
>
>
>
> Chris Worcester
>
> Solar Wind Works
>
> NABCEP Certified PV Installer
>
> Office 530-582-4503
>
> Cell 530-448-9692
>
> Fax 530-582-4603
>
> www.solarwindworks.com
>
> ch...@solarwindworks.com
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
> Behalf Of *Solar Energy Solutions
> *Sent:* Friday, July 29, 2016 4:14 PM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Protecting Asphalt Shingled Roofs
>
>
>
> What kind of hose set up do you use?  We do too, during the hot months,
> but now you have me thinking about a rooftop drip irrigation system!
>
>
>
>
>
> *Andrew Koyaanisqatsi*
>
> *President*
>
>
> *Solar Energy Solutions, Inc.The BRIGHT CHOICE*
>
>
> *Since 1987, helping you and your Portland neighborsmove towards an
> environmentally sustainable future.*
>
>
> *503-238-4502 <503-238-4502>www.SolarEnergyOregon.com
> <http://www.solarenergyoregon.com/> *
>
>
>
> On Friday, July 29, 2016 3:44 PM, Chris Worcester <
> ch...@solarwindworks.com> wrote:
>
>
>
> The hose is our best friend, next are foam pads like a twin mattress size,
> these grip well. We’ve used cardboard over the ridge to protect it from
> ropes if our lifelines go over it. On the steeper pitches we use walk
> boards made from ripping 5/8” or ¾” plywood into 12” x 8’ strips and
> nailing/screwing a 2x6 or 2x10 to one edge, depending on the pitch. Then we
> drill (3) 1” holes to run webbing through and tie them off to our
> standoffs. These work well, we’ve also laid 2x4’s above the lower row of
> standoffs allowing us to walk on them.
>
>
>
> Chris Worcester
>
> Solar Wind Works
>
> NABCEP Certified PV Installer
>
> Office 530-582-4503
>
> Cell 530-448-9692
>
> Fax 530-582-4603
>
> www.solarwindworks.com
>
> ch...@solarwindworks.com
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org
> ] *On Behalf Of *August Goers
> *Sent:* Friday, July 29, 2016 11:19 AM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Protecting Asphalt Shingled Roofs
>
>
>
> Hi James,
>
>
>
> Great topic! Minimizing roof wear and tear during installation is a big
> deal. We have Yellow Spaghetti mat (
> http://www.bestmaterials.com/PDF_Files/yellow-spaghetti-datasheet.pdf)
> and carpet scraps. Each has pros and cons. Spaghetti mat is durable and we
> use it over and over. It does get slippery when wet and doesn’t have good
> enough grip over ~ 26-30 degree pitched roofs. Carpet actually performs
> better when wet but it gets heavy and messy. We can also use carpet on
> steeper roofs where we actually tie it off to our anchors by making a hole
> in the top of the carpet piece and tying a rope to it.
>
>
>
> It takes a lot of perseverance to get crews to consistently protect the
> roof to the level that is required to minimize damage. It has to be part of
> every installation plan just like fall protection.
>
>
>
> On hot days we try to get on the roof as early as possible and off the
> roof by the time the roof gets warm and soft. One of my colleagues
> mentioned that they would spray a roof down with a garden hose to cool it
> off on hot days, I  haven’t personally tried that.
>
>
>
> August
>
> Luminalt
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
> Behalf Of *Jerry Shafer
> *Sent:* Friday, July 29, 2016 9:58 AM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Protecting Asphalt Shingled Roofs
>
>
>
> Wrenches
> We have used carpet scraps, they stick well and cheap, we get them from a
> local installer
> Jerry
>
>
>
> On Jul 29, 2016 5:26 AM, "James Rudolph"  wrote:
>
> Aloha Team Wrenches,
>
>
>
> How are we best protecting asphalt shingled roofs during the install?
>
>
>
> Does anybody use "yellow spaghetti mats" up on pitched roofs with any
> success?
>
>
>
> Mahalo in advance,
>
>
> *James B. Rudolph

Re: [RE-wrenches] Pass through/transition box for Enphase

[Carl Adams]

I second Mike Nelson's approach, simple, easily inspectable, rugged.

Carl Adams
SunRock Solar
NABCEP Certified PV Installer

On Aug 10, 2016 12:20 PM, "Mike Nelson"  wrote:

> I have been using buchannon copper crimps with their plastic snap on "wire
> nuts" for years to splice rooftop wires (enphase or pv wire to string
> inverter) inside junction boxes or soladecks. Best connection you can have
> and I've never had one come loose or melt down.
>
> Michael D Nelson
> MD Electric & Solar, Inc.
> 707-684-0064 mobile
> 707-884-1862 office
> www.mdelectricsolar.com
> Sent from my iPhone
>
> On Aug 9, 2016, at 11:03 PM, Ray Walters  wrote:
>
> I think the issue has always been locating the right parts, not the
> installation.  Everyone carries the Cobra X flex, but not the ferrules. We
> usually crimp lugs on and use breakers with stud terminals, so the need for
> ferrules is minimal.
>  I have always wondered about the terminal bussbars from Outback and
> Midnite though.  They're ILSCO and I can't find any mention about extra
> flex, which usually means they are not rated for anything beyond Class B
> stranding.
>
> R.Ray Walters
> CTO, Solarray, Inc
> Nabcep Certified PV Installer,
> Licensed Master Electrician
> Solar Design Engineer303 505-8760
>
> On 8/8/2016 9:54 PM, Jay wrote:
>
> Thimbles are easy to install and make fine strand wire OK for use in
> standard connections.
>
> Jay
> Peltz power.
>
> On Aug 8, 2016, at 5:39 PM, Glenn Burt  wrote:
>
> Be aware that depending upon the vintage of the Engage cable, up to
> recently the conductors used in their cables are fine stranded and cannot
> be used in the terminal blocks provided with the Soladeck.
> This has been acknowledged by Enphase with a revision to their Engage
> manufacturing spec, and by Soladeck to me in writing. One fix is to confirm
> the date of manufacturer of the Engage cable ( much of the fine strand
> version remains in distribution). Another is to source appropriate ferrules
> to be crimped onto the fine stranded conductors before using them in the
> standard Soladeck terminals.
>
> Also beware of the same issue if you are splicing with these older Engage
> cables. Most screw terminals like Polaris are also not listed for use with
> fine stranded conductors. NSI has a special Polaris terminal that is grey
> that is listed for use with fine stranding, and can safely be used.
> I saw a few incorrect Polaris blocks pulled from an installation recently
> that had melted...
> --
> From: Michael Morningstar 
> Sent: ‎8/‎8/‎2016 15:23
> To: RE-wrenches 
> Subject: Re: [RE-wrenches] Pass through/transition box for Enphase
>
> I use DIN rail mount "feed through" terminal blocks. There's all kinds and
> you will find some constructed such that no live parts exposed.
> Michael
>
> On Aug 8, 2016, at 8:49 AM, Jason Szumlanski  floridasolardesigngroup.com> wrote:
>
> I'm looking to bring 8 Enphase 240V circuits in multiple conduits into an
> enclosure inside the attic where I can transition to Romex. I'd rather use
> some kind of rail mounted terminals in an enclosure or something rather
> than making splices in a generic j-box. I'm not looking to combine circuits
> - just transition from THWN to Romex and keep things neat an organized.
>
> Any suggestions?
>
> Jason Szumlanski
>
>
>
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[RE-wrenches] Amphenol and MC4 crimper

[Carl Adams]

Hello Wrenches,

I wanted to ask you about Helios and MC4 crimpers.  I bought a set of
theAmpenol H4 crimp teeth and loactor for my Reinstag crimper some time
back, to handle the Amphenol H4 connectors They work well but require
changing the locator for femal and male crimps and they are expensive.  I
see this tool is out there.
<https://www.aeeexpress.com/crs/storeus/browse/productDetailSingleSku.jsp?productId=094-7#>
CRIMP TOOL 2.5MM-6MM, HELIOS 4, PV-670508-000
094-7

It seems a less expensive solution and simpler than the Reinstag set.  Any
experience with this?  What are your thoughts.

With Regards
Carl Adams, President
SunRock Solar, LLC
513.290.9072 (cell)
513.766.6025 (office)
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[RE-wrenches] Roof layout and proposal tools

[Carl Adams]

Hello Wrenches,

I've been using ModSolar for preliminary estimated and roof layout.  While
it works OK, it can be a bit kwirky at times and the aerial imagery is at
times less than ideal.  I'm looking to see what else is out there?

Carl Adams
SunRock Solar
NABCEP Certified PV Installer
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[RE-wrenches] Evergreen Solar Panels (ES-A-200-fa3)

[Carl Adams]

Looking for some of these Evergreen modules or something compatible.
Please contact me of list.

Carl Adams
SunRock Solar
NABCEP Certified PV Installer
cad...@sunrocksolar.com
513.290.9072
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[RE-wrenches] SMA Sunny WebBox mobile/wireless options

[Carl Adams]

Hello Wrenches,

I have an existing customer who has a Sunny WebBox which has been in
service for several years with no issues.  He is happy with the
service.  He is leaving the country for 1 year for work and wants to
continue the service while he rents out his house.  He can't leave his
internet service in place, to which the WebBox is now hard wired, and
would like to have a mobile/wireless option for keeping this in
service.

I also have a new install on a farm where the family is planning to
move into sometime after the PV system/WebBox is in place and would
like to suggest a wireless option for them to use while the house is
being renovated and prior to their wired internet connection being in
place.

Have any of you dealt with this situation previously,  and if so do
you have any working installations running over mobile services?

With Regards
Carl Adams
SunRock Solar
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[RE-wrenches] PathFinder Photo at 18 degrees latitude needed

[Carl Adams]

Hello Wrenches,

I am in need of a Pathfinder photo at 18 degrees latitude which shows
an open sky (no or limited shading) to use in some simulations.  I
don't have that template in my kit and have ordered them but if anyone
has a file photo in the interim please send it to me off list.

With Regards
Carl Adams
SunRock Solar, LLC.
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[RE-wrenches] MC4 Box connectors

[Carl Adams]

Hello Fellow Wrenches

Is anyone using MC4 box connectors and if so do you have a source for
these in small quantities.  I need 20 each male and female for an
upcoming project.  MC Part number 32.0057P0001 for the Male and
32.0056P0001 for the Female.

With Regards
Carl Adams
SunRock Solar
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Re: [RE-wrenches] MC4 Box connectors

[Carl Adams]

Dana, Jay, William,

Thanks for your responses.
AEE did not carry the box/bulhead MC4 only the standard cable connector.
PV-Cable suggested by Jay had the connectors at $2.97 each, and can
provide these in small quantities

William, I would be interested in seeing a photo of the new technique
if you could share it.

With Regards
Carl Adams
SunRock Solar

On Fri, Mar 2, 2012 at 10:41 AM, jay peltz  wrote:
> Hi William,
>
> Was this cheaper than getting bulkhead fittings?
> Very cool work around.
>
> Jay
>
> peltz power
> On Mar 2, 2012, at 7:19 AM, William Miller wrote:
>
>> Carl:
>>
>> That is the only type of connector we use.  They are very solid and save one 
>> extra splice for each positive or negative lead.  See: 
>> http://millersolar.com/MillerSolar/practices/Technical_Procedures/PV_wiring/_PV_wiring.html
>>
>> Just yesterday, working with a machinist, we figured out a simple procedure 
>> for modifying a 1/2" threaded plug to accept the threaded stud on the back 
>> of these connectors.  Now we can thread these into 1/2" hubs on bell boxes.  
>> Very handy.
>>
>> We have only ordered them in quantities of 100.
>>
>> Good luck,
>>
>> William
>>
>>
>
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Re: [RE-wrenches] Combining Solectria PVI 2500 with SB3000

[Carl Adams]

Dave,
You can also change the jumper settings on the SMA,  so that it does not
require a neutral.

Regards
Carl
On Apr 19, 2012 2:06 PM, "Dave Palumbo" 
wrote:

> Dave,
>
> Very good. Thanks for the pick up on the 650A Service Disconnect issue.
>
> Dave Palumbo
>
> -Original Message-
> From: re-wrenches-boun...@lists.re-wrenches.org
> [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dave Click
> Sent: Thursday, April 19, 2012 1:39 PM
> To: re-wrenches@lists.re-wrenches.org
> Subject: Re: [RE-wrenches] Combining Solectria PVI 2500 with SB3000
>
> This is fine; your PVI2500 is rated for 10.4A, while the SB3000 is 12.5A.
> You can put up to 24A rated current through your 30A fuses.
> Though the disconnect isn't technically a service disconnect, I'd recommend
> using a 60A rated (fused at 30A) disconnect per 230.79(D). You would run a
> neutral to your combining panel and I'd recommend a "PV SYSTEM ONLY; NO
> LOAD
> CIRCUITS TO BE ADDED" placard on that. Otherwise that'll be an
> electrician's
> first choice when wiring up the new 40A hot tub.
>
> I think something like the Cutler-Hammer BR24L70RP panel may be a good fit,
> and it would replace your fused disconnect. It only has space for two 2P
> breakers (no main).
>
> On 2012/4/19 12:29, Dave Palumbo wrote:
> > Wrenches,
> >
> > We have an installation in place since 2008 working well with a
> > Solectria PVI 2500 feeding a supply side grid connection.
> >
> > Homeowner wants us to double the system size now. I can buy a SB3000
> > inverter for $ 300 less than the Solectria PVI 2500 (with upcharge for
> > 10 yr warranty) and I'm inclined to go with the Sunny Boy.
> >
> > We would add an Inverter 240Vac combiner load center before our 30A
> > Fused Disconnect. I would think that it would be OK to combine the
> > 240vac outputs of different inverter manufacturers and sell into the
> > grid but never having done this I wanted to run it by you folks. The
> > SMA phone tech didn't seem to be the most experienced person and after
> > I spoke with him for a minute I had him saying that it should work fine.
> > But wanted to check with more experienced people.
> >
> > One wrinkle is that the Solectria does not use a Neutral, but the
> > Sunny Boy does. Again, I don't think that this will any problem.
> >
> > David Palumbo
> >
> > Independent Power LLC
> >
> > 462 Solar Way Drive
> >
> > Hyde Park, VT 05655**
> >
> > */www.independentpowerllc.com /*
> >
> > NABCEP Certified PV Installer
> >
> > Vermont Solar Partner
> >
> > 24 Years Experience, (802) 888-7194
> >
> >
> >
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Re: [RE-wrenches] Boxes and bags

[Carl Adams]

I second the Veto Pro Pak.  Tough as nails, and nice organization.
Multiple configurations to suit your purpose.
On Apr 23, 2012 5:08 PM, "bob ellison"  wrote:

> I have used tool bags from Sears for years, graduating to bigger each time.
> At the present time I have switched to the one with the rubber bottom, it's
> big and will not soak up moisture when it gets set in a puddle or whatever.
>
> Bob
>
> -Original Message-
> From: re-wrenches-boun...@lists.re-wrenches.org
> [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Hilton
> Dier
> III
> Sent: Monday, April 23, 2012 3:00 PM
> To: re-wrenches@lists.re-wrenches.org
> Subject: [RE-wrenches] Boxes and bags
>
> Here's an everyday, practical question for my fellow wrenches: What kind of
> bag or box do you use for your everyday assortment of tools?
>
> For years I have been carrying my cutters, stripper, screwdrivers,
> multimeter, etc., in an aluminum suitcase about the size of a double
> thickness briefcase. I call it my 90% box because it carries 90% of the
> tools I use regularly. It has loops and pockets inside the lid for pliers,
> cutters, and screwdrivers. It has a partition system in the rest with an
> internal lid. I think it was billed as an office equipment repairman's
> case.
> The problem is that the hinges are broken and the partitions have
> deteriorated to uselessness. I need a new case. This one wasn't ideal, so
> I'm looking for suggestions.
>
> Thanks,
>
> Hilton
>
> --
> Hilton Dier III
> Renewable Energy Design
> Partner, Solar Gain LLC
> 453 East Hill Rd.
> Middlesex, VT 05602
>
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[RE-wrenches] Dynoraxx

[Carl Adams]

Hello Wrenches,

Has anyone installed the DynoRaxx system.  I am looking for some
feedback on the product from someone who has hands on experience.  If
not feel free to add your  opinion on the best ballasted flat roof
mounting system you do have experience with.

With Regards
Carl Adams
SunRock Solar
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[RE-wrenches] Sunny Portal kwh/kwp specific yield

[Carl Adams]

Hello Wrenches,

I have a number of sites on SMA and monitor them via daily emails and
the sunnyportal.  The "Plant List" provides a feature I like whereby
all plants are listed in order of their specific yield (kwh
produced/kw installed).  There are two columns to this data, one for
the current month, the other for the year.  As I look at the monthly
column I see the plants listed as I would expect Best performing
arrays at the top Worst performers at the bottom.  The second column
(annual specific yield) does not seem to line up with my expectations.
 Has anyone looked at this and if so can you offer any insights?

With REgards
Carl Adams
SunRock Solar
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[RE-wrenches] Solar Attic Fans

[Carl Adams]

Fellow Wrenches,

I have had several prospects and customers ask about installation of
solar attic fans.  One customer had a roof replacement prior to our PV
install and the roofing contractor installed a solar attic fan.  I
could not make out any name brand on the unit, but it was quite noisy
for a brand new device.  Makes me wonder about it's longevity.  Have
any of you a good quality brand you would recommend for those
customers who are interested?

With Regards
Carl Adams, SunRock Solar
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[RE-wrenches] Generac tech support phone number

[Carl Adams]

Hello wrenches,
In the field today commissioning a Sunny Island system. We are using a Generac 
ATS (nexus smart switch).  I have this number 888.436.3722 but am told when I 
call they don't provide phone support. Any help appreciated. 

Sent from my iPhone
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[RE-wrenches] 120V grid tie inverter recommendation

[Carl Adams]

Hello Wrenches,

We are looking at a job where we need to install a number of small 2K PV
systems where we only have 120V AC available.  Is there a good choice for a
small grid tie AC inverter in this voltage and power range?

With Regards
Carl Adams
SunRock Solar
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Re: [RE-wrenches] 120V grid tie inverter recommendation

[Carl Adams]

Thanks BIll, Jesse, David, Drake, and Allan,

It seems the Exeltech is a good choice for this application.  Gris tied
with 120V supply to the PV array location.

With REgards,
Carl Adams
SunRock Solar
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[RE-wrenches] SI5048 Commissioning Test

[Carl Adams]

Hello Wrenches,

We have commissioned a new SI system (240V single phase residential) and
want to ensure testing is adequate to ensure the system will perform as
desired.

The system consists of two SI5048s, 5kW PV array, SB5000US, battery bank,
transfer switch, backup generator, and supplemental digital relay to
activate DigIn signal on Grid DOWN condition.

I am sure there are many test scenarios to run through to qualify the
system.  Here is one.
Test Case 1

   1. Verify SOC is 95%+
   2. Modify GnSocTm1Str and GnSocTm1Stp to artificially high numbers (85%
   and  90% respectively)
   3. Power off SB5000US to eliminate charging from solar
   4. Simulate Grid Outage
   5. Verify Transfer switch moves to generator input position
   6. Verify DigIn signal to SI5048 reflects grid state (grid is down)
   7. Monitor SOC and verify that when SOC reaches GnSocTm1Str (85%) the SI
   starts the generator
   8. Monitor SOC and verify that when SOC reaches GnSocTm1Stp (95%) the SI
   stops the generator
   9. Power ON the SB5000US
   10. Reset GnSocTm1Str and GnSocTm1Stp to system specific values.
   11. End Test

Another test would be to bring the grid back up after step 7 or after step
8 and verify correct behavior.

I would love to hear from those who have commissioned similar SI
configurations, about other scenarios we should be testing to adequately
qualify the system.

Carl Adams
SunRock Solar
NABCEP Certified PV Installer
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[RE-wrenches] PVSYST or similar analysis needed

[Carl Adams]

Hello Wrenches,

I am in need of an analysis for a large battery backup system.  I am
looking for a sweet spot in PV array size and battery bank size.  I need
this modeled on a time of day basis, and evaluated monthly thru a full
calendar year.  I am told that PVSYST can perform such an analysis but I
neither have the tool nor the experience using it to perform the modeling,
so I am looking to hire the job out to someone who does.  If any of you
have the software and expertise to use it please contact me off list for
more detailed requirements.

With Regards
 Carl Adams, SunRock Solar.
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Re: [RE-wrenches] Solar Pool Heating

[Carl Adams]

Jason,

We do a few systems each year, and I think it would add to the discussions,
probably not enough traffic to support it's own list.

Carl
SunRock Solar


On Wed, Nov 28, 2012 at 8:32 PM, Jason Szumlanski wrote:

> I was wondering how many people on the list do solar pool heating and if
> it would be appropriate to post occasional topics of interest. It's quite
> distant from what we normally discuss, so maybe it's not the right place.
>
> Thoughts?
>
> Jason Szumlanski
>
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Re: [RE-wrenches] finding array ground faults

[Carl Adams]

Marco,

I second Chris' suggestion.  Disconnect all strings at the combiner.  Check
VOC PV+ to ground, and PV- to ground on each string, and PV+ to PV-.  This
should point you to the faulty string.  If the string consists of 10
modules, each with VOC of 30 volts then you should see +300V from PV+ to
PV- (assuming negatively grounded array), and 0 volts PV+ to ground, and 0
volts PV- to ground.  If you find a string where you see +60V from PV+ to
ground, and -240V PV- to ground, your ground fault is on that string and is
likely between the 2nd and 3rd module as you move from PV + of the string
to PV-. (2 * 30V voc = 60V) (8 *30V voc = 240V).

Hope this helps
Carl
SunRock Solar.com



On Wed, Feb 6, 2013 at 12:57 AM, Marco Mangelsdorf wrote:

>  Hoo boyI’ve got a tough one here.  Trying to troubleshoot an array
> ground fault with a system that has 14 strings mounted on a metal roof with
> the whole roof and metal framed building being common to ground.
>
> ** **
>
> Can anyone recommend any diagnostic tools out there to troubleshoot and
> locate ground faults?
>
> ** **
>
> Thanks,
>
> marco
>
> ** **
>
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[RE-wrenches] Squirrel/leaf guard for solar array

[Carl Adams]

Hello Wrenches,

I serviced an array yesterday which had accumulated a large amount of
leaves under the modules.  No evidence of squirrels at this point, but I
know there has been discussion of protective fencing around arrays to
prevent squirrels moving in and I wonder if the same system might keep the
leaf debri from building up under the array.  Do any of you have
suggestions for materials and methods to do this.  A link to photos of
installed projects would be appreciated.

Thanks
Carl Adams
SunRock Solar
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Re: [RE-wrenches] DC generators

[Carl Adams]

Very interesting Jay,

A customer just asked me two days ago, if it would be possible to install a
DC Generator to feed his six SunnyBoy 6000s at night.  He was thinking of a
water cooled genny from which he could harvest heat while also providing
power to the inverters.  He said he thought the economics could work with
the current low NG prices, but only during the winter months when he has a
need for the excess heat being generated.

The Kohler you point out doesn't have the voltage specs to match the
SB6000s, but I'd be interested in other thoughts on this approach.

Carl Adams
SunRock Solar

On Tue, Mar 5, 2013 at 10:17 AM, jay peltz  wrote:

> HI All,
>
> I know many of you like this concept.
>
> I was just made aware of a new product from Kohler.
>
> Kohler 6vsg.  Natural gas or propane, 24, 36,48v dc only
> looks pretty good, I understand it was made for the telecom industry.
>
> And while I"m not normally on board with the DC genset idea, that i can
> get 222 amps from 6kw at 24v is very appealing.
>
>
> http://www.kohlerpower.com/industrial/filterresults.htm?categoryNumber=12061§ionNumber=13261&filter_1=Variable%20Speed,%20Direct%20Current
>
> Cheers,
>
> jay
>
> peltz power
>
>
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[RE-wrenches] Modules approved for horizontal mounting

[Carl Adams]

Hello wrenches,

I have a request for quote,  which shows modules mounted horizontally on a
supporting structure.  This is being done more for show than production
obviously.  The approved modules in the bid spec are Sharp, Renesolar, LDK,
and Trina.

Does anyone know if these modules are approved, by the manufacturer, for
flat (horizontal) mounting, or have a good point of contact with any of
these manufacturers so I can get a quick answer direct from them?  We have
a 20 psf design snow load in our area.

Cheers
Carl Adams
SunRock Solar
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[RE-wrenches] seimens QP 20 A 240 V breaker backfeed

[Carl Adams]

-Forwarded on behalf of Gary Easton at ARP-Solar


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



-- Forwarded message --
From: gary easton 
Date: Tue, Apr 23, 2013 at 1:12 PM
Subject: backfeeding breakers
To: RE-wrenches 


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

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

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

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




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

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

“First they ignore you. Then they laugh at you. Then they fight you. Then
you win.”
~Ghandi
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Re: [RE-wrenches] Enphase "AC Frequency Out Of Range"

[Carl Adams]

Passing this info along

One of our Enphase customers reported that his local electric utility
installed a new metering system, TWACs by Aclara.   Once they installed a
new meter on the service, the system began registering ACFOOR (AC Frequency
Out Of Range) messages.He contacted Enphase and they informed him that
this issue has occurred previously on other installations where the utility
has a TWACs metering system (Please reference case number 260517).
Enphase applied a firmware upgrade to the site and that has resolved the
issue.

With Regards
Carl Adams
SunRock Solar



On Mon, Apr 15, 2013 at 4:12 PM, Dave Palumbo
wrote:

> I’d like to revisit a thread from early February where we were discussing
> Enphase microinverters going off line due to utility power quality issues
> when “Pinging” of smart meters occur.
>
> ** **
>
> I have a system where I was told by Enphase that they applied their
> software fix in late March, but in this case it did work in fixing the
> problem of the inverters dropping for anywhere from 5 minutes to an hour a
> couple of times per day. The drops are not regular and now it appears that
> they are not connected to the pinging of the meters on my customers site as
> we had the utility change their schedule to only ping at midnight.
>
> ** **
>
> We are still seeing AC Frequency Out of Range errors almost daily on our
> M-215 inverters. Sometimes it is for only several inverters and other times
> up to the whole array of 32 inverters. On my other Enphase systems have no
> problems.
>
> ** **
>
> What other issues besides utility pinging of my customers smart meter
> could be causing the problem?
>
> ** **
>
> Could the pinging of the neighbors meters by the utility off of the same
> transformer be affecting the Enphase M-215’s? I’m suspicious of something
> other than this because the errors occur at random times that appear
> unrelated to utility pinging.
>
> ** **
>
> Thanks,
>
> Dave
>
> ** **
>
> David Palumbo
>
> Independent Power LLC 
>
> 462 Solar Way Drive
>
> Hyde Park, VT 05655**
>
> *www.independentpowerllc.com *
>
> Vermont Solar Partner
>
> 25 Years Experience, (802) 888-7194 
>
> ** **
>
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Re: [RE-wrenches] SHW Schuco issue

[Carl Adams]

Dave,

Were you successful in tracking down one of these pumps?  We have a number
of Schuco units in the field all running fine at present, but it would be
good to have a part source when the time comes.  Any joy locating a US
distributor for the Tyfocor-LS?

Cheers
Carl Adams
SunRock Solar
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