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

[Conrad Geyser]

Same thing going on here

Conrad
Cotuit Solar


Conrad Geyser, Principal
Cotuit Solar LLC
508-428-8442

On Fri, Aug 5, 2016 at 9:59 AM, gary easton <g...@arp-solar.com> wrote:

> just a worthless ticket but no action and certainly no timely
> reimbursement if at all.   I would never do business with this company
> again.
>
> On Fri, Aug 5, 2016 at 9:38 AM, <penobscotso...@midmaine.com> wrote:
>
>> Just to renew this line of conversation, I have been waiting for several
>> call backs form Enphase, with no results, for the past three weeks. I also
>> have warranty claims that go back four months+ that have not been
>> fulfilled. I will not sell any more Enphase, at all, until they resolve
>> these communication and warranty issues.
>>
>> Daryl DeJoy
>> NABCEP Certified PV Installer
>> Penobscot Solar Design
>>
>>
>>
>>
>> > It seems like we are talking about inverter and module customer service
>> > (good and bad) a lot lately.
>> >
>> > Has anyone else noticed that Enphase seems to have stopped responding to
>> > tickets submitted via their website? Hold times are unacceptable, so I
>> > gave
>> > up on that, but nobody gets back to you when you try to contact them via
>> > their web form for weeks, even about an existing RMA or ticket, and they
>> > no
>> > longer let you update tickets by email. They are very helpful and
>> > competent
>> > if you get them on the phone, but who has time for that?!
>> >
>> > I'm also waiting an unacceptable amount of time on a major module
>> > manufacturer warranty claim right now. I'd love to see Home Power or
>> > someone do a story on manufacturer responsiveness to dealers. Things are
>> > generally going down hill it seems.
>> >
>> > Jason Szumlanski
>> > Florida Solar Design Group
>> > ___
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>
>
> --
> 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] Favorite BIPV?

[Conrad Geyser]

Hi all,

Hoping that some of you may be interested in sharing your experiences with
different building integrated PV systems.

I have played around with various approaches over the years including some
fairly experimental ones.  *Not with customers!  *Currently on my radar for
off the shelf systems are Lumos(expensive) and Galaxy Roof systems(have yet
to see in the field).

Seems like we ought to have an affordable, ready to go BIPV market to turn
to when the need arises, but seemingly not yet?

best,

Conrad
Cotuit Solar


Conrad Geyser, Principal
Cotuit Solar LLC
508-428-8442

On Sun, Jul 24, 2016 at 9:03 AM, Conrad Geyser <conr...@cape.com> wrote:

> Hi all,
>
> Hoping that some of you may be interested in sharing your experiences with
> different building integrated PV systems.
>
> I have played around with various approaches over the years including some
> fairly experimental ones.  *Not with customers!  *Currently on my radar
> for off the shelf systems are Lumos(expensive) and Galaxy Roof systems(have
> yet to see in the field).
>
> Seems like we ought to have an affordable, ready to go BIPV market to turn
> to when the need arises, but seemingly not yet?
>
> best,
>
> Conrad
> Cotuit Solar
>
>
> On Sat, Jul 23, 2016 at 9:35 PM, Glenn Burt <glenn.b...@glbcc.com> wrote:
>
>> Hi Jerry,
>>
>>
>>
>> It passes the initial power up tests fine, and fails at almost the same
>> time of day when it faults with a 4301 Electric Arc Detected. Not usually
>> the next day, often it will be fine for a week or so.
>>
>> According to the web box, the inverter has the latest available firmware.
>>
>> I am hoping it is a failure at a splice in a rooftop jbox (all are
>> exposed on the ridge).
>>
>> I went there last week, but the customer office manager decided she
>> wanted a written safety plan before she was comfortable letting me climb on
>> the roof, so I am cogitating on that.
>>
>>
>>
>> Thanks for your thoughts.
>>
>> Glenn
>>
>>
>>
>> *From:* Jerry Shafer [mailto:jerrysgarag...@gmail.com]
>> *Sent:* Friday, July 22, 2016 11:05 PM
>> *To:* RE-wrenches; glenn.b...@glbcc.com
>> *Subject:* Re: [RE-wrenches] Replacing grounded inverters
>>
>>
>>
>> Question, is it the first test where it is checking for noise in the
>> system or is it finding a fault once it is running. Does it have the latest
>> software update, which code do you have test failure or arc failt detected,
>> way different trouble shooting tracks yo follow. If it is a test fail try
>> to remove just the ground wire from the array, because its a metal roof its
>> a big antenna and hears something that is to much for the test to deal
>> with. If it fails due to an arc then there is most likely an arc at a
>> connection.
>>
>> Jerry
>>
>>
>>
>> On Jul 22, 2016 3:37 PM, "Glenn Burt" <glenn.b...@glbcc.com> wrote:
>>
>> August,
>>
>>
>>
>> I am currently chasing down unexplained AFCI faults with old SX 160
>> modules on a metal roof and having replaced two SMA SWR-2500U’s with a SB
>> 5000TL-US-22. So far I have been swapping input strings to see if there is
>> a pattern, however no joy.
>>
>> Next visit is up on the roof (steep pitch) to see if there is anything
>> obvious.
>>
>> I hate to simply disable the AFCI functionality without a serious effort,
>> however I am approaching that point.
>>
>> It is a T job for a system installed by others back in 2004, about an
>> hour trip 1 way and I am afraid the customer will soon believe I am
>> stringing out the work.
>>
>>
>>
>> Looking forward to hearing more of your experience as it develops!
>>
>>
>>
>> -Glenn
>>
>>
>>
>> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
>> Behalf Of *August Goers
>> *Sent:* Friday, July 22, 2016 10:23 AM
>> *To:* RE-wrenches
>> *Subject:* Re: [RE-wrenches] Replacing grounded inverters
>>
>>
>>
>> Glen,
>>
>>
>>
>> It’s interesting you mention that you’re having AFCI issues with new TL
>> inverters and old modules. We are too. We have a particular system with BP
>> modules where we’re trying to figure out if we have a warranty claim
>> situation. We’ve cleaned up all the DC-side wiring and still the Sunny Boy
>> is tripping with AFCI errors. We think it is either corroded traces in the
>> modules or perhaps bypass diode issues in the module j-boxes. More to come.
>>
>>
>>
>> Au

[RE-wrenches] Favorite BIPV?

[Conrad Geyser]

Hi all,

Hoping that some of you may be interested in sharing your experiences with
different building integrated PV systems.

I have played around with various approaches over the years including some
fairly experimental ones.  *Not with customers!  *Currently on my radar for
off the shelf systems are Lumos(expensive) and Galaxy Roof systems(have yet
to see in the field).

Seems like we ought to have an affordable, ready to go BIPV market to turn
to when the need arises, but seemingly not yet?

best,

Conrad
Cotuit Solar


On Sat, Jul 23, 2016 at 9:35 PM, Glenn Burt  wrote:

> Hi Jerry,
>
>
>
> It passes the initial power up tests fine, and fails at almost the same
> time of day when it faults with a 4301 Electric Arc Detected. Not usually
> the next day, often it will be fine for a week or so.
>
> According to the web box, the inverter has the latest available firmware.
>
> I am hoping it is a failure at a splice in a rooftop jbox (all are exposed
> on the ridge).
>
> I went there last week, but the customer office manager decided she wanted
> a written safety plan before she was comfortable letting me climb on the
> roof, so I am cogitating on that.
>
>
>
> Thanks for your thoughts.
>
> Glenn
>
>
>
> *From:* Jerry Shafer [mailto:jerrysgarag...@gmail.com]
> *Sent:* Friday, July 22, 2016 11:05 PM
> *To:* RE-wrenches; glenn.b...@glbcc.com
> *Subject:* Re: [RE-wrenches] Replacing grounded inverters
>
>
>
> Question, is it the first test where it is checking for noise in the
> system or is it finding a fault once it is running. Does it have the latest
> software update, which code do you have test failure or arc failt detected,
> way different trouble shooting tracks yo follow. If it is a test fail try
> to remove just the ground wire from the array, because its a metal roof its
> a big antenna and hears something that is to much for the test to deal
> with. If it fails due to an arc then there is most likely an arc at a
> connection.
>
> Jerry
>
>
>
> On Jul 22, 2016 3:37 PM, "Glenn Burt"  wrote:
>
> August,
>
>
>
> I am currently chasing down unexplained AFCI faults with old SX 160
> modules on a metal roof and having replaced two SMA SWR-2500U’s with a SB
> 5000TL-US-22. So far I have been swapping input strings to see if there is
> a pattern, however no joy.
>
> Next visit is up on the roof (steep pitch) to see if there is anything
> obvious.
>
> I hate to simply disable the AFCI functionality without a serious effort,
> however I am approaching that point.
>
> It is a T job for a system installed by others back in 2004, about an
> hour trip 1 way and I am afraid the customer will soon believe I am
> stringing out the work.
>
>
>
> Looking forward to hearing more of your experience as it develops!
>
>
>
> -Glenn
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
> Behalf Of *August Goers
> *Sent:* Friday, July 22, 2016 10:23 AM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Replacing grounded inverters
>
>
>
> Glen,
>
>
>
> It’s interesting you mention that you’re having AFCI issues with new TL
> inverters and old modules. We are too. We have a particular system with BP
> modules where we’re trying to figure out if we have a warranty claim
> situation. We’ve cleaned up all the DC-side wiring and still the Sunny Boy
> is tripping with AFCI errors. We think it is either corroded traces in the
> modules or perhaps bypass diode issues in the module j-boxes. More to come.
>
>
>
> August
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On
> Behalf Of *Glenn Burt
> *Sent:* Friday, July 22, 2016 5:08 AM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Replacing grounded inverters
>
>
>
> If you read some of the proposed changes for the 2017 NEC, it is looking
> life there will be no problem replacing isolated inverters with
> non-isolated versions. In fact the proposed wording seems to allow either
> USE, or PV wire to be used with non-isolated inverters explicitly going
> forward.
> It made me feel better about doing recent replacements.
> I'm having more trouble with the TL inverters and AFCI issues on older
> systems, however.
> --
>
> *From: *Gary at Santa Ynez Valley Solar 
> *Sent: *‎7/‎21/‎2016 21:43
> *To: *re-wrenches@lists.re-wrenches.org
> *Subject: *[RE-wrenches] Replacing grounded inverters
>
> We are all facing having to replace the old transformer based inverters
> when they run out. Really difficult to find replacements. Against code to
> replace with transformer less ones. I wonder if a DC/DC transformer could
> be installed just ahead of the transformer less inverter for isolation
> purposes? Not clear on the concept.
>
>
>
>
>
> Gary
>
>
>
>
>
> Gary Gordon
>
>
>
>
>
>www.SYVSolar.com 
>
>PO Box 688
>
>Santa Ynez, CA  93460
>
>805 688-1213
>
>NABCEP Certified Installer
>
>CA Licensed 

[RE-wrenches] reflective label maker?

[Conrad Geyser]

Anybody have a favorite reflective label maker that they would care to
share the info on?

Conrad
Cotuit Solar LLC
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Re: [RE-wrenches] Plastic washers

[Conrad Geyser]

Jay,

I would suggest that he has a point, that the dissimilar metals do have a
reaction.  But that the reaction is self limiting and that stainless
fasteners with aluminum are used in marine applications albeit only with
anodized aluminum.  Or say fine and invoice accordingly for the plastic
washers.

Conrad
Cotuit Solar




Conrad Geyser, Principal
Cotuit Solar LLC
508-428-8442

On Wed, Jan 27, 2016 at 8:02 AM, Jason Szumlanski <
ja...@floridasolardesigngroup.com> wrote:

> Another engineer, eh?
>
> I'd say no... Tell him to find another installer. 50 million Elvis fans, I
> mean PV installations, can't be wrong.
>
> Ask him if he brings his own scissors to the hairdresser? That's my
> favorite line.
>
>
> Jason Szumlanski
>
>
> On Wed, Jan 27, 2016 at 12:37 AM, Jay <jay.pe...@gmail.com> wrote:
>
>> Hi all
>>
>> I've got a client who insists on "plastic " ( synthetic) washers between
>> SS washers and the aluminum racking and modules.
>>
>> I'm tried every angle to assure him it's not a problem to no effect.
>>
>> So anybody have any recommendations about type, material, and where to
>> buy?
>>
>> Thanks
>>
>> Jay
>> Peltz power.
>>
>>
>> ___
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Re: [RE-wrenches] to flash or not to flash

[Conrad Geyser]

Tump,

Glad you feel you have a superior method.  Please feel free to use it but
do not assume that your process is superior for others and hence infer an
alleged best practice.

Silicone does indeed react with aluminum; it bonds with it by etching the
surface.  This is a good thing.

I agree with you on looking out for polyurethane products (some made by
Sika) that asphalt degrades!   No need to wander far, silicone works great
and stays flexible indefinitely.  Polyurethane has some great properties
but is not oil or bitumen(asphalt) resistant.

Conrad

On Thu, Aug 6, 2015 at 3:25 PM, Tump t...@swnl.net wrote:

 Silicone is not a roof mastic and it does react to Alu despite your record
 w/ your historic installation methods. We and our industry are now in the
 21st century with 21 century requirements and many hi quality roof mastic
 sealants. The way I figure it is that I am a professional solar installer,
  I am not a roofer nor a sealant engineer but they have provided our
 industry with requirements and products to ensure my clients receive hi
 level of quality installations despite the costs.
 On Aug 6, 2015, at 2:13 PM, Jason Szumlanski wrote:

 This started as an asphalt shingle attachment discussion, so it's
 important to note that many of the sealants from Sika are NOT compatible
 with asphaltic/bitumunous surfaces. Many competitors are still using
 products from this company that are specifically noted by the manufacturer
 as not compatible with the materials being sealed. Make sure your sealant
 is compatible with the roof!




 On Thu, Aug 6, 2015 at 1:34 PM, jarmo.venalai...@schneider-electric.com
 wrote:

 Hi:

 People may already know about this, but I thought I would pass it on in
 case some dont.

 We do a lot of work with the boating and RV industry in the US and
 overseas.

 One sealant name which has come up a lot with strong positive reviews
 regarding age related drying/shrinking not only in the US but overseas as
 well is SIKA.

 Here's a link to their website,

 http://usa.sika.com/

 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*
 jarmo.venalai...@schneider-electric.com  |   *Site:** www.Xantrex.com*
 http://www.xantrex.com/  |   *Address:* 3700 Gilmore Way, Burnaby, BC
 V5G4M1
 Mail Attachment.gif http://www.xantrexrebate.com/

 From: Matt Partymiller m...@solar-energy-solutions.com To: RE-wrenches
 re-wrenches@lists.re-wrenches.org, Date: 08/06/2015 10:16 AM Subject: Re:
 [RE-wrenches] to flash or not to flash Sent by: RE-wrenches 
 re-wrenches-boun...@lists.re-wrenches.org
 --



 Daniel,

 My answer is to flash until others prove me wrong.

 I am in the same position you are, speaking to the same manufacturers you
 are, and probably dealing with the same low competitor pricing you are.
 These products sure sound tempting.

 Over the past decade I have probably removed a dozen 80's era hot air or
 hot water systems that were directly attached to roofs (installed by
 others).  In every instance the roof was a complete mess and required deck
 replacement.  I now tell homeowners just to contact a roofer and have them
 dispose of the collectors in the process of re-roofing - we will come out
 after the new roof is in place.

 I think you summed up the sealant problem quite well.  I sell my systems
 as a 25 year product.  I am not satisfied that butyl is a 25 year answer.
 Until someone convinces me otherwise, I will relate as much to my
 customers and proceed with proper flashings.

 Good poll.

 Matt


 Matthew Partymiller
 Solar Energy Solutions LLC
 (877) 312-7456
 m...@solar-energy-solutions.com


 On Thu, August 6, 2015 12:47 pm, Daniel Young wrote:
  Writing the subject above, it seems like I've heard this question on the
  wrench list before, but I could not find it in my old email archives.
 Feel
   free to pint me back to the old discussion if it's there.
 
 
 
  I've been using a flashing based roof attachment for 8+yrs now (quick
  mount or similar). Now we are looking at Rail-less systems  (quick rack
 is
  a good example). There is also a non-flashed rail-less racking from
  roof-tech http://roof-tech.us/ . I've always been of the opinion that
  simply crushing some sealant/gasket onto an asphalt shingle work fine at
  first (the test data from roof-tech is impressive), but would be an
 issue
  10+yrs down the
  road (thermal expansion movement, freeze/thaw, etc). I can make a good
  waterproof seal at first by just slathering some butyl/silicone to an
  L-foot
  and cranking it down on the shingles, but that practice really
 disappeared
   8+yrs ago.
 
 
 
 
  Maybe consider this a Poll: (to flash, or not to flash)
 
 
 
 
  With Regards,
 

Re: [RE-wrenches] to flash or not to flash

[Conrad Geyser]

Hi fellow Wrenches,

Flashing -

We have ~30 years experience with ~700 systems dating back to 1980 here in
the Northeast primarily on asphalt shingles.

Standard attachment method on these historic systems and currently for us
is a lagged foot bedded in silicone.  We've seen no leaks including the
historic systems as long as there was solid attachment to framing and the
foot size was big enough to not crush the roofing.

Our current technique is to use a single lag through the center of a 1.5 x
5 foot.  Bed the foot 100% and run the lag in coated as well.   Fillet all
gush out (you can look these terms up  :  ). Don't use GE silicone below
45F - it will never cure.

For aspahlt here in the NE, I feel as though the flashing products are OK
but actually create more roof liability as they require the releasing of
shingles at a minimum.

Conrad Geyser
Cotuit Solar LLC
NAPCEP PV and Thermal







On Thu, Aug 6, 2015 at 1:16 PM, Matt Partymiller 
m...@solar-energy-solutions.com wrote:

 Daniel,

 My answer is to flash until others prove me wrong.

 I am in the same position you are, speaking to the same manufacturers you
 are, and probably dealing with the same low competitor pricing you are.
 These products sure sound tempting.

 Over the past decade I have probably removed a dozen 80's era hot air or
 hot water systems that were directly attached to roofs (installed by
 others).  In every instance the roof was a complete mess and required deck
 replacement.  I now tell homeowners just to contact a roofer and have them
 dispose of the collectors in the process of re-roofing - we will come out
 after the new roof is in place.

 I think you summed up the sealant problem quite well.  I sell my systems
 as a 25 year product.  I am not satisfied that butyl is a 25 year answer.
 Until someone convinces me otherwise, I will relate as much to my
 customers and proceed with proper flashings.

 Good poll.

 Matt


 Matthew Partymiller
 Solar Energy Solutions LLC
 (877) 312-7456
 m...@solar-energy-solutions.com


 On Thu, August 6, 2015 12:47 pm, Daniel Young wrote:
  Writing the subject above, it seems like I've heard this question on the
  wrench list before, but I could not find it in my old email archives.
 Feel
   free to pint me back to the old discussion if it's there.
 
 
 
  I've been using a flashing based roof attachment for 8+yrs now (quick
  mount or similar). Now we are looking at Rail-less systems  (quick rack
 is
  a good example). There is also a non-flashed rail-less racking from
  roof-tech http://roof-tech.us/ . I've always been of the opinion that
  simply crushing some sealant/gasket onto an asphalt shingle work fine at
  first (the test data from roof-tech is impressive), but would be an issue
  10+yrs down the
  road (thermal expansion movement, freeze/thaw, etc). I can make a good
  waterproof seal at first by just slathering some butyl/silicone to an
  L-foot
  and cranking it down on the shingles, but that practice really
 disappeared
   8+yrs ago.
 
 
 
 
  Maybe consider this a Poll: (to flash, or not to flash)
 
 
 
 
  With Regards,
 
 
 
 
  Daniel Young,
 
 
  NABCEP Certified PV Installation ProfessionalTM: Cert #031508-90
 
 
  ___
  List sponsored by Redwood Alliance
 
 
  List Address: RE-wrenches@lists.re-wrenches.org
 
 
  Change listserver email address  settings:
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Re: [RE-wrenches] offsetting generator loads with PV

[Conrad Geyser]

Hi Jerry,

Most of these sites have intermittent grid and onsite full sized
generators.  When the grid is up, it supports net metering.  So I'm hoping
to be able to program inverters for grid tied and generator tied.

When the grid is up, it is a large scale grid.

thanks,

Conrad


On Sun, Oct 5, 2014 at 12:32 AM, Jerry Shafer jerrysgarag...@gmail.com
wrote:

 I have done some work in central America where there was only a genny down
 the road that supplied power and it would only run if someone put fuel in
 it, is this your issue also.
 Jerry












 On Sat, Oct 4, 2014 at 7:37 AM, Conrad Geyser conr...@cape.com wrote:

 Esteemed wrenchies,

 I'm working on Integrating PV with a group in the Caribbean on commercial
 sites with intermittent gird power.  Need to be able to work grid tied and
 generator tied.  No UL 1741.  Anybody worked with this? Need some
 consulting and/or therapy.

 always a pleasure,

 Conrad
 NABCEP PV and thermal
 Cotuit Solar LLC, etc.


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[RE-wrenches] offsetting generator loads with PV

[Conrad Geyser]

Esteemed wrenchies,

I'm working on Integrating PV with a group in the Caribbean on commercial
sites with intermittent gird power.  Need to be able to work grid tied and
generator tied.  No UL 1741.  Anybody worked with this? Need some
consulting and/or therapy.

always a pleasure,

Conrad
NABCEP PV and thermal
Cotuit Solar LLC, etc.
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Re: [RE-wrenches] DC arc welder?

[conrad geyser]

Hi Tom,

 

Yes it works great.  PV is the perfect set up for welding - it doesn't
matter if you short it out.  The modules in the youtube are in parallel, not
series, and that is how I've done it.  We have a power trailer set up for
temporary power that works perfectly - it's 9: 195W Suntechs:
http://imageevent.com/cotuitsolar/1303publicalbum?p=40
http://imageevent.com/cotuitsolar/1303publicalbum?p=40n=1m=-1c=3l=0w=4
s=0z=3 n=1m=-1c=3l=0w=4s=0z=3  It's about right for 3/32 stick
welding under optimum conditions if you're a decent enough welder.

 

Conrad

Cotuit Solar

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Tom DeBates
Sent: Saturday, November 23, 2013 8:50 AM
To: re-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] DC arc welder?

 

Hello Wrenches,
   Recently, while working overseas, we were asked by a welder we employed
if we could make a solar welder for him. So, not wanting to dismiss his
request, my initial thought was to eliminate an inverter and welder for cost
and efficiency reasons and weld directly from a battery bank. I have done
some homework on this and it seems as though it may be feasible. There is a
YouTube video of a guy doing this with 3, 12 volt batteries in series. This
would be stick welding only and rod of ~ 3/32. There would be some details
to work through, but the biggest one seems to be a means to limit current to
the electrode. Has anyone attempted this and/or know of a means to limit the
current to the rod?
Thank you,

Tom DeBates

Habi-Tek
Geneva,IL. 60134

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Re: [RE-wrenches] PV-direct electric water heating

[conrad geyser]

Hilton and Allan,

 

If the system has an Outback or any other charge controller with a diversion
load setting, the diversion to water heating or ice making can be made to
happen at a fully charged setpoint only.   I have a system set up making ice
which does this nicely - it typically comes on by 11 AM (if the
load/collection ratio hasn't been to high) and actually cycles some later in
the day.  It never takes the 24 V bank below 27.1 V(continues to float) and
leaves the system with topped off batteries and a bunch of ice at the end of
any halfway decent day.  Saves lots of battery load.  Ice lasts for a week.
Works pissah.  

 

Conrad

Cotuit Solar

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Allan
Sindelar
Sent: Tuesday, May 14, 2013 11:24 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] PV-direct electric water heating

 

Hilton,
That sounds like a good idea at first glance but a bad one when you dig a
bit deeper. In essence he is sacrificing proper absorption on the batteries
and will pay the price in reduced battery capacity and life. As soon as the
batteries reach the bulk voltage setpoint, which is typically about 85% SOC
and would normally trigger the absorption stage, the charge current is
diverted to the heating element. As soon as the controller switches it over,
the battery voltage drops to the reconnect point - sort of like an old Trace
C30A, which was never a good controller. In the best case, the energy cycles
back and forth between absorption and diversion, or if the controller has
PWM, I suppose a portion would go to each.

Somehow I just can't see how it could be made to work without these inherent
complications.
Allan

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

 

 

On 5/14/2013 6:22 PM, Hilton Dier III wrote:

A friend of mine lives off grid with PV and wind. He added a shunt-type
controller to his battery bank and connected it to a DC heating element in
his hot water tank. Below a set voltage the element is dormant. When the
battery bank hits a high voltage (at the end of a particularly sunny day or
during a windy spell) the element comes on. That way, instead of just a PWM
shutoff and wasted energy, he gets some benefit.

I wouldn't deliberately install PV just for hot water, but in an off grid
situation where the excess would go to waste, it makes sense.

Hilton



-- 
Hilton Dier III
Renewable Energy Design
Partner, Solar Gain LLC
453 East Hill Rd.
Middlesex, VT 05602






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[RE-wrenches] C-46 abe to do tie ins?

[conrad geyser]

JLC is publishing a residential installation article by me and goes to
print this week.  There is going to be some information on licensing  - are
you c-46 allowed to do everything related to a grid tied PV system - even
say a line tap?

 

thanks,

 

Conrad

Cotuit Solar

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Marco
Mangelsdorf
Sent: Saturday, January 19, 2013 4:53 PM
To: 'RE-wrenches'
Subject: [RE-wrenches] PV permitting standards

 

We've got a strange situation in our little Aloha State.  While the counties
of Maui, Kauai and the Big Island require a PV permit package to include
system design schematics with the package, the largest county in the state
by population, the island of O'ahu, does not require any schematic for
residential systems.  This blows my mind.

 

I'm wondering if there are other AHJs out there on the Mainland where no
schematics are required to obtain a PV permit.

 

Any feedback would be appreciated.

 

Thanks,

marco

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Re: [RE-wrenches] Fridge recommendations?

[conrad geyser]

David,

 

Is this on or off grid?

 

Conrad

Cotuit Solar

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Rob Shappell
Sent: Wednesday, January 09, 2013 3:44 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Fridge recommendations?

 

If possible, locate the refer in a cold room to reduce winter consumption.
We had a Sunfrost RF 12, and a cold room for winter. Brrr.

 

Rob

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dave Palumbo
Sent: Wednesday, January 09, 2013 2:45 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Fridge recommendations?

 

I'm having difficulty finding a RF in the 16 to 20 cu ft range that uses
less than 350kWh/yr. All of the GE units listed by Energy Star as 300 to
311kWh/yr are no longer being manufactured according to my local appliance
dealers.

 

I see a Fridgidaire 18.2 cu ft that uses 335kWh/yr (reviews that I see on
this unit complained of loud clunky noises). 

 

Sun Frost units are too pricey for this application.

 

Any recommendations?

 

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] Fridge recommendations?

[conrad geyser]

Dave,

 

My favorite approach is a Gibson(or similar coil-in-shelves style
http://www.google.com/imgres?hl=ensa=Xtbo=dbiw=1241bih=580tbm=ischtbn
id=UW2FlKpAEZ9uJM:imgrefurl=http://forsale.oodle.com/view/gibson-commercial
-upright-freezer/3089328239-watertown-ny/docid=zp1bWc9OglDZ2Mimgurl=http:/
/i.oodleimg.com/item/3089328239u_1x424x360f%253F1341103609w=424h=360ei=Jy
XuUMnKFLKu0AHSgoHQBgzoom=1iact=hcvpx=471vpy=66dur=803hovh=208hovw=244
tx=119ty=135sig=118117522962116310335page=2tbnh=142tbnw=168start=25n
dsp=29ved=1t:429,r:29,s:0,i:179 ) up right freezer.  Section off the top
part where the coils do the most work with some loose foam insulation and
fill that portion of the freezer with 1 gallon water jugs.  Then run it off
the diversion load of the Outback.  I have one of these rigs going on the
construction trailer at one of our jobsites and it's been an icy cold fridge
without fail for the last eight months.  And obviously  it doesn't add any
load to the battery bank.  Once the diversion load comes on, the freezer
goes to work making ice in the jugs.  That ice can carry through five days
of cloudiness.  In colder weather it's necessary to leave it unplugged a
good portion of the time and you have to play around with the parameters on
the diversion load to get them to do what you really want.  The energy
stored in the phase change from water to ice is equivalent to the amount of
energy to change the water temperature from 173°F to 32°F, so it's really
huge.  And water is a lot cheaper than batteries!  I have a design for a
thermostat that turns it off automatically when the jugs are all the way
frozen but I haven't had to build it yet as I've just been unplugging.

 

Conrad

Cotuit Solar

 

From: Dave Palumbo [mailto:d...@independentpowerllc.com] 
Sent: Wednesday, January 09, 2013 4:26 PM
To: conr...@cape.com; 'RE-wrenches'
Subject: RE: [RE-wrenches] Fridge recommendations?

 

Off grid.

 

And good suggestions from Rob and Todd on the cold location.

 

Best,

 

Dave

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of conrad
geyser
Sent: Wednesday, January 09, 2013 3:52 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Fridge recommendations?

 

David,

 

Is this on or off grid?

 

Conrad

Cotuit Solar

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Rob Shappell
Sent: Wednesday, January 09, 2013 3:44 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Fridge recommendations?

 

If possible, locate the refer in a cold room to reduce winter consumption.
We had a Sunfrost RF 12, and a cold room for winter. Brrr.

 

Rob

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dave Palumbo
Sent: Wednesday, January 09, 2013 2:45 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Fridge recommendations?

 

I’m having difficulty finding a RF in the 16 to 20 cu ft range that uses
less than 350kWh/yr. All of the GE units listed by Energy Star as 300 to
311kWh/yr are no longer being manufactured according to my local appliance
dealers.

 

I see a Fridgidaire 18.2 cu ft that uses 335kWh/yr (reviews that I see on
this unit complained of loud clunky noises). 

 

Sun Frost units are too pricey for this application.

 

Any recommendations?

 

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-wrenches] 15 kV redundant relay

[conrad geyser]

Fellow wrenches,

Anybody know a source for a 15 kVredundant relay ?  I have a 1 MW farm
ready to go online and the engineering didn't spec. this utility
requirement.   Everybody's many weeks out on producing.

Happy Thanksgiving all,

Conrad
Cotuit Solar 

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Re: [RE-wrenches] MC4 Y Connectors

[conrad geyser]

Allen,

 

Our read is that it's OK to use unfused wyes on systems with 2 strings only.
If one string shorts, the other string can't overcurrent it.  As soon as you
are ringing together more than two strings, you need to fuse each one.

 

Conrad

Cotuit Solar

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Allen
Frishman
Sent: Wednesday, March 07, 2012 4:35 AM
To: RE-wrenches
Subject: [RE-wrenches] MC4 Y Connectors

 

Wrenchers,

Has anyone used MC4 Y Connectors to combine strings?  This website claims
that they are TUV Certified but does not list the manufacturer.  Seems like
best practice to fuse each string but wanted to see what others think about
this product and the idea of fusing every two strings instead of each
individual string.

 

http://www.solarpenny.com/MC4-Y-Connectors-609-4431.htm

 

Al Frishman
AeonSolar

(917) 699-6641 tel:%28917%29%20699-6641  - cell
(888) 460-2867 tel:%2%29%20460-2867 
www.aeonsolar.com http://www.aeonsolar.com/ 

 

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Re: [RE-wrenches] SolarEdge v Enphase

[conrad geyser]

Andrew,

 

We installed a Solar Edge system on a 5 kW this spring.  We've had to
replace all the optimizers and the inverters.  They've been OK with support
on this but perhaps a bit slow in throwing in the towel making us go back
three times.  Maybe the bugs are out by now but our experience wasn't one
I'd like to repeat.

 

Conrad

Cotuit Solar

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Andrew
Truitt
Sent: Thursday, January 12, 2012 1:25 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] SolarEdge v Enphase

 

 

Does anyone have any experience installing SolarEdge?  The advantage that I
see over microinverters from a reliability standpoint is that the power
optimizers do not contain electrolytic capacitors.  The inverter is also
supposed to last longer since it does not handle the MPPT duties so the
electronics are less complex.

 

Marv - Do you have any SolarEdge reliability and / or performance data you
can share beyond the white paper on the SolarEdge website?  Also, one issue
that I've had with Enphase is an occasional loss of data transfer between
inverters and the monitoring system - does SolarEdge have that issue?  If
not, how have you overcome it?  Can you share a link to a live SolarEdge
system monitoring interface?

 

 

 

Andrew Truitt

Truitt Renewable Energy Consulting

 

 

On Thu, Jun 9, 2011 at 12:40 PM, Mark Frye ma...@berkeleysolar.com wrote:

Indeed.

 

Yes it is 1v per module when not operating, but still 250V when operating.
That means that all code requirements for 250V still apply to the DC wiring
such as bonding bushings for conduit as required etc.

 

SolarEdge is making hay off of this safety feature, but this feature is
inherent in microinverters as well. 


Mark Frye 
Berkeley Solar Electric Systems 
303 Redbud Way 
Nevada City,  CA 95959 
(530) 401-8024 tel:%28530%29%20401-8024  
 http://www.berkeleysolar.com/ www.berkeleysolar.com  

 

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of benn kilburn
Sent: Thursday, June 09, 2011 10:54 AM
To: Wrenches
Subject: Re: [RE-wrenches] SolarEdge v Enphase

Mark, 

I thought that the SolarEdge reduced the 'string' voltage to 1V per
unit/module, reducing the high DC voltage risk factor, until the inverter
switch was turned on?


The fact that by hitting the off switch on the inverter will reduce the
potentially high DC voltage to 1V per unit/module could be an advantage from
a safety perspective (maintenance, firemen/utility workers)

 

Labor/time-wise, it is like installing both a microinverter system and a
string inverter system together, soo

 

benn


DayStar Renewable Energy Inc.  

b...@daystarsolar.ca

780-906-7807 

HAVE A SUNNY DAY 


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Re: [RE-wrenches] Vent Pipes under an array?

[conrad geyser]

Al,

 

It has long been on my list to come up with a  code compliant way of routing
vents under pipes and out the North side.  I'll let you know if I come up
with one!

 

Conrad

Cotuit Solar

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Allen
Frishman
Sent: Thursday, December 15, 2011 2:31 PM
To: re-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] Vent Pipes under an array?

 

Wrenchers, 

My local JHA has recently decided that vents for anything other than fresh
air are not allowed under the solar array.   The ones that are causing me
the biggest problem are the plumbing vent pipes as I have several projects
with 10 or more pipes to deal with.  Has anyone successfully proven that it
is not a health problem to vent under the array since there is plenty of
airflow between panels and on all 4 sides of the array?  Other than
extending the pipes through the array by leaving out panels, are there any
other suggestions? 

 My application is flat roofs with raised multiple row arrays (100+ solar
panels)

 All feedback is appreciated.

Al Frishman
AeonSolar

(917) 699-6641 tel:%28917%29%20699-6641  - cell
(888) 460-2867 tel:%2%29%20460-2867 
www.aeonsolar.com http://www.aeonsolar.com/ 

 

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[RE-wrenches] mc4 inline fuses

[conrad geyser]

Hi all,

 

Does anybody have any experience with / have a source for MC 4 inline fuses?
http://www.win-solarllc.com/index.php?page=shop.product_details
http://www.win-solarllc.com/index.php?page=shop.product_detailsflypage=fly
page-ask.tplcategory_id=5product_id=122vmcchk=1option=com_virtuemartIte
mid=113
flypage=flypage-ask.tplcategory_id=5product_id=122vmcchk=1option=com_vi
rtuemartItemid=113

 

thanks,

 

Conrad

Cotuit Solar

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ron Young
Sent: Thursday, November 10, 2011 6:33 PM
To: boB Gudgel; RE-wrenches
Subject: Re: [RE-wrenches] Xantrex Vesta Online units

 

So would these be suitable for an off-grid application Bob? Any comments on
the reliability? The proposed set is in individual residences on a First
Nations reserve and the recipients will have zero technical knowledge for
operation of them.

 

Ron Young

 

On 2011-11-10, at 2:41 PM, b...@midnitesolar.com wrote:





On 11/10/2011 1:41 PM, Ron Young wrote: 

Hi all, does anyone have any experience with the Xantrex Vesta Online units?
I have just been contacted by a client who has several of these in storage
and he wants to put them into use as off-grid inverter systems. The only
thing I've been able to find out about them is that they seem to be UPS
units. Client has no further info or manuals. I have a pic if anyone needs a
look. 

 

Best Regards,

Ron Young



The Vesta that I remember was a very early Xantrex,  late Trace battery box
like thing with an inverter
in it.  The inverter would normally have been either a Statpower Prosine  or
a Trace PS2512 or
some other voltage.   We called it the Pentasine cuz it had 5 transformers.

I wasn't sure if the Vesta was a shipping product but I guess they/we did
ship some.

I have a couple of those that I use for shelves in the basement.  They had
doors.

boB











earthRight Products - Solareagle.com http://Solareagle.com/ 

Alternative Energy Solutions ~ Renewable Energy Products

1-877-925-2929

blog: http://www.earthrightsolar.tumblr.com
http://www.earthrightsolar.tumblr.com/ 

website: http://www.solareagle.com http://www.solareagle.com/ 

email: sa...@solareagle.com

79F North Third Ave

Williams Lake, BC

V2G 2A3

 






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Re: [RE-wrenches] mixing aluminum and galvanized steel

[conrad geyser]

My experience on the Northeast coast(salty sometimes) is that the
galvanizing helps protect all the metals in the system.  The zinc in the
most anodic metal on the chart and will help protect anything.  On the
contrary, the stainless and the aluminum do react and in the case of
fasteners, often freeze. 

 

Don't use zinc plated of course, just hot dipped.

 

Conrad

Cotuit Solar

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kristopher
Schmid
Sent: Wednesday, October 05, 2011 12:45 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] mixing aluminum and galvanized steel

 

This is an amazingly timely post for me!  I was just thinking of asking the
same question since i have a couple of ground mount installs coming up with
concrete pillars/galvanized anchor bolts/aluminum channel base.  I notice
that DPW for example specs galvanized pipes to be attached with u-bolts to
their aluminum racking in their LGM racks.  

Anxiously awaiting the collective wisdom...

On Wed, Oct 5, 2011 at 11:23 AM, Jeff Yago jry...@dtisolar.com wrote:

For years we have used standard mounting racks like UniRac rails bolted
together with stainless-steel hardware.  On larger arrays this usually means
bolting their extruded aluminum module rails to galvanized 3 pipe supports
for ground mounted arrays.

 

We have recently received several flags during the engineering review
process of our design documents on state funded projects stating all bolted
connections between aluminum and galvanized steel will require neoprene
washers to prevent corrosion.

 

Any of you run into this requirement or have had any problems?  The only
issues we ever see with corrosion is mixing copper and aluminum such as
where somebody used wrong type module frame ground connectors.

 

Jeff Yago


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-- 
Shine On!

Kris Schmid
Legacy Solar, LLC
864 Clam Falls Trail
Frederic, WI 54837
www.legacysolar.com http://www.legacysolar.com/ 
715-653-4295
NABCEP Certified PV Installer
BSEE

 

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Re: [RE-wrenches] Piping Reynolds Solar Hot Water Collectors

[conrad geyser]

We just use standard copper 5/8 compression fittings and have for decades
with no galvanic consequences.  Sometimes tough to find a clean section of
tubing to go on.  Also some limited success with a copper and aluminum
compatible solder

Conrad
Cotuit Solar

-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Brian
Mehalic
Sent: Thursday, June 23, 2011 7:44 AM
To: cwar...@entech-engineering.com; RE-wrenches
Subject: Re: [RE-wrenches] Piping Reynolds Solar Hot Water Collectors

I believe the absorber plate and piping is aluminum, so a galvanic isolation
fitting - compression if you can find it - would allow you to transition to
copper pipe. 

Sent from my iPhone. 

On Jun 23, 2011, at 7:30 AM, Christopher Warfel
cwar...@entech-engineering.com wrote:

 I have come into possession of two, ~4 x12 Reynolds collectors and I 
 need to pressure test them. It looks like the piping to and from the 
 collectors was radiator hose. I have not been able to find any 
 installation instructions on line for the way to pipe these and was 
 wondering if anyone had a reference source. Thanks for any help. Chris
 
 --
 
 Christopher Warfel, P.E.
 ENTECH Engineering, Inc.
 Energy Utilization Experts
 (401)466-8978
 
 The information contained within this communication shall be 
 considered confidential and shall not be retransmitted without 
 knowledge of the sender. Please contact us if this email reached you 
 in error. Thank you.
 
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Re: [RE-wrenches] 690.4 (B) ???

[conrad geyser]

Kirk,

Just zip tie your DC stuff together and your AC stuff together and keep the
two bundles separate.  Then they can be in the same trough.  At least that's
the way we do it.  I don't know about in the same conduit, I'd guess no. 

Conrad
Cotuit Solar

-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirk
Herander, VSE
Sent: Saturday, April 09, 2011 9:29 PM
To: k...@vtsolar.com; 'RE-wrenches'
Subject: Re: [RE-wrenches] 690.4 (B) ???

PS Does this merely mean that conductors from more than one source must be
bundled(connected) together, but are allowed in the same conduit?

Kirk Herander
Vermont Solar Engineering
802.863.1202
NABCEP(tm) Certified Solar Installer
NYSERDA-eligible Installer
VT Solar Incentive Program Partner

-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirk
Herander, VSE
Sent: Saturday, April 09, 2011 9:10 PM
To: 'RE-wrenches'
Subject: [RE-wrenches] 690.4 (B) ???

2008 NEC states that:

(B) Conductors of Different Systems. Photovoltaic source circuits and
photovoltaic output circuits shall not be contained in the same raceway,
cable tray, cable, outlet box, junction box, or similar fitting as feeders
or branch circuits of other systems, unless the conductors of the different
systems are separated by a partition or are connected together.

Can anyone describe and give an example of what connected together means
to inverter PV circuits in the same conduit as a branch (load) circuit?

I have a single existing PVC conduit to a barn with an AC load subpanel. I
want to run the output conductors of an inverter combiner panel in the barn
through the same conduit to get to be main building. The fill / derating
calcs work to do this. The inspector says I have to run a new conduit for
the AC inverter combiner because the subpanel feeder and the combiner output
conductors are not connected. But they are both connected to the main
building panel. Any insight will be appreciated. Thanks. I've also been told
that the NEC 2011 comments on 690.4 (B) clarify this. Can anyone comment?
Obviously I am not mixing DC and AC conductors.



Kirk Herander
Vermont Solar Engineering
802.863.1202
NABCEP(tm) Certified Solar Installer
NYSERDA-eligible Installer
VT Solar Incentive Program Partner

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[RE-wrenches] PV encapsulation qualities

[Conrad Geyser]

Esteemed wrenches,

As the Chinese invasion continues, I imagine that most of us will end up
using products made in China at some point.

Most of my experience and knowledge has indicated the Chinese modules are by
and large going to be of comparable quality to any other crystalline silicon
module.  The one aspect that I haven't seen much information on is the
encapsulation.  

Anyone up on their Tedlar  Tedlar substitutes?  All the Tedlar that I've
known from 80's exterior pipe insulation has truly been amazingly durable
stuff even in direct sunlight.  The stuff typically is still holding up 30
years later.  But now I've been stymied by trying to get backing and
encapsulation information out of manufacturers no matter where they are.  I
am very nervous that less expensive substitution will lead to premature
failure of backing or other encapsulation points.  I've seen too many
plastics undergo breakdown with age to not be nervous.

My concern for a early February day...

Conrad
Cotuit Solar

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Re: [RE-wrenches] Protection against birds

[Conrad Geyser]

Lee,

We have had to run a wire mesh perimeter guard around our arrays at some
sites.  Squirrels can be quite a problem as well - they chew the wires!

Conrad
Cotuit Solar

-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dana
Sent: Monday, October 25, 2010 5:05 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Protection against birds

LOEWs had bird spikes in the insect and rodent poison area.

Thanks,  Dana Orzel

Great Solar Works, Inc
E - d...@solarwork.com
V - 970.626.5253
F - 970.626.4140
C - 970.209.4076
web - www.solarwork.com

Responsible Technologies for Responsible People since 1988


-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf
Of Lee Bristol
Sent: Monday, October 25, 2010 2:45 PM
To: RE-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] Protection against birds

Hi Wrenches,

My prospect has an existing problem with birds (black birds,
pigeons,
and sparrows) nesting on their roof in every available nook
and
cranny.  They are concerned about the birds soiling the
modules.  I
have suggested putting a wire mesh around the array so that
the birds
can't get under the array and build nests.  I am concerned
about the
nests that will be built along the top of the array on the
wire mesh
that I have so conveniently located for them.  If there are
too many
nests then the air flow up and under the array could be
compromised.

Any thoughts?  Possibly spikes along the top of array to
discourage
landing, pictures of cats, or warning signs - Birds-High
Voltage go
further South

Thanks!

Lee
-- 
Lee Bristol
NABCEP Certified Solar Designer/Installer

Co-Founder  Commercial Channel Manager
Standard Solar, Inc.
1355 Piccard Drive, #300
Rockville, MD 20850
(301) 944-5105
(240) 479-1510 (c)
www.standardsolar.com
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Re: [RE-wrenches] VAWT recommendation

[Conrad Geyser]

Hear hear!  We need to rout the RE industry of the charlatans that will only
serve to bring the responsible people down.

VAWTs do not employ the Bernoulli Effect - the laminar flow phenomenon that
gives all foils/wings their power.  They are categorically inefficient.  

There are plenty of HAWT companies out there selling poor, untested
equipment with non disclosure policies too.  Please be very careful when
entering into any wind project!  Wind power is a whole different animal from
good old solar!  Make sure that you get a number of good references for
anything that you do and verify field results and longevity before buying!  

There is such a thing as a good wind project.  I've seen too many people
hurt by bad wind projects. 

Conrad
Cotuit Solar 

-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of
g...@remotepowerinc.com
Sent: Thursday, October 21, 2010 10:13 AM
To: re-wrenches@lists.re-wrenches.org
Subject: Re: [RE-wrenches] VAWT recommendation

Kelly,

I've never seen one or heard of one that produces power or lasts.  If you
install these your name is on them.  If they don't work it reflects on you
and your business.  I'd write the prime contractor a short note letting
them know that you cannot find a VAWT that you can recommend with a clear
conscious and because you don't want he and his company to wind up with a
black eye, your not going to recommend a VAWT to him for purchase.

If he's smart he'll tell the Navy he can't get a knowledgeable person with
a conscious to sell him one and they'll do the right thing and either
install a HAWT of good lineage or more solar.

Best,

Greg Egan
Remote Power Inc.

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 Today's Topics:

1. Re: VAWT recommendation (Dan Fink)
2. Re: Mounting Enphase when using S-5-PV Clamps (benn kilburn)
3. Re: The perfect solar ready roof (Hans Frederickson)
4. Re: VAWT recommendation (Kelly Keilwitz, Whidbey Sun  Wind)
5. Re: VAWT recommendation (Dan Fink)
6. Re: Mounting Enphase when using S-5-PV Clamps
   (North Texas Renewable Energy Inc)
7. Re: VAWT recommendation (Kelly Keilwitz, Whidbey Sun  Wind)
8. Re: Inverter 1741 Listing Process (Exeltech)
9. Re: The perfect solar ready roof
   (North Texas Renewable Energy Inc)
   10. Re: The perfect solar ready roof (Chris Daum)
   11. Re: The perfect solar ready roof (Richard L Ratico)
   12. Re: The perfect solar ready roof (Chris Daum)
   13. Re: VAWT recommendation (Darryl Thayer)
   14. Re: The perfect solar ready roof (benn kilburn)


 --

 Message: 1
 Date: Wed, 20 Oct 2010 15:16:46 -0600
 From: Dan Fink dan...@hughes.net
 To: RE-wrenches re-wrenches@lists.re-wrenches.org
 Subject: Re: [RE-wrenches] VAWT recommendation
 Message-ID: 4cbf5c3...@hughes.net
 Content-Type: text/plain; charset=ISO-8859-1; format=flowed

 Kelly;

 I would insist on a years worth of actual wind speed versus energy
 output data performed by an unaffiliated third party, before even
 touching this project with a 10-foot gin pole.

 DAN FINK
 Buckville Energy Consulting LLC

 Kelly Keilwitz, Whidbey Sun  Wind wrote:
 Wind wrenches,
 We have a subcontract to install 30kW of VAWT, along with 30kW of PV for
 the Navy. The Navy specified Helix Wind turbines, and is adamant on
 sticking with VAWTs, although they may accept an alternative. The GC we
 are working under is sufficiently scared of Helix to look for a viable
 alternative. Are there any?!

 The GC has done some research and wants to use the UGE-4K from Urban
 Green Energy http://www.urbangreenenergy.com
 It's an H-style lift machine that appears to have several European
 certifications on safety, power performance, noise, and vibration.

 Anyone know anything about these turbines or company? UGE's address is
 NY. Roy?

 Thanks,
 -Kelly

 Kelly Keilwitz, P.E.
 Whidbey Sun  Wind
 Renewable Energy Systems
 ke...@whidbeysunwind.com
 360-678-7131
begin_of_the_skype_highlighting  360-678-7131  end_of_the_sk
ype_highlighting



 --

 Message: 2
 Date: Wed, 20 Oct 2010 16:17:36 -0600
 From: benn kilburn b...@daystarsolar.ca
 To: Wrenches re-wrenches@lists.re-wrenches.org

[RE-wrenches] Proven 15 turbine

[Conrad Geyser]

Anybody out there interested in talking about the Proven 15 kW (now called
the Proven 35)?

Conrad Geyser

Cotuit Solar




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[RE-wrenches] Concordes / desulphator / Lithium ion?

[Conrad Geyser]

A bit of a follow up on a thread of about three months ago where we had
taken over an orphaned bank of Concorde 12V VRLA, 10 parallel banks of 4.
Thanks for all the input on this!

 

Efforts to revive via fixed amperage charging have not proven successful.
These batteries had been sorely abused.  A friend recommends to try a Pulse
tech desuphator, swears by them.  Any experience with one of these?

 

Going with some big Surettes for replacements.

 

Maybe soon we'll have some 1000 amp hour Lithium Ion cells and can put all
this lead acid stuff behind us!

 

Conrad

Cotuit Solar

 

 

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dana
Sent: Saturday, February 13, 2010 3:43 PM
To: 'RE-wrenches'
Subject: [RE-wrenches] Refractometer vs Hydrometer?

 

We have retired the Hydrometer and now use only refractometer. We have used
them for 4+ years now.

Our clients that do their own battery maint. Are so impressed that we have
sold quite a few to that crowd too.

 

They are safer and less intrusive: you only use a drop of electrolyte.

Faster to use than a Hydrometer.

Appear to be a more accurate reading VS. the Hyd..

Will check propylene and eythethlene glycol concentrations.

Are 1/10 as susceptible to getting broken in a work truck or situation.

1/3 the size of a hydrometer and live in a padded case.

Calibrated to distilled H2O and we have never had to re-adjust the setting.

And best of all they are easy to keep clean and do not drip battery acid for
days even if the hydrometer is washed out.

 

A hands down winner in my book - $100-125 at your local plumbing wholesale.
You may want to get an extra plastic flap lid, we have had a couple come
apart.

 

 

 

Dana Orzel

 

Great Solar Works, Inc

www.solarwork.com

E - d...@solarwork.com

V - 970.626.5253

F - 970.626.4140

C - 970.209.4076

 

I will be the shift in how the world uses power! - Dana Orzel

 

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[RE-wrenches] Investment Tax Credit SEIA

[Conrad Geyser]

Hi Peter,

 

1)   Only the DOT grant alternative to the ITC is due to expire. SEIA is
pushing for an extension.  I couldn't be more impressed by this organization
and would strongly encourage everyone in this industry to join.  There are
varying levels of membership and it costs some money but it is well worth
it.  They are very active in Washington and keep members updated with
webinars on legislation, accounting, tax issues, etc.

2)   Yes!

 

Perhaps Michael can see the accounting / economics as part of the
mechanics..   : 

 

Conrad

Cotuit Solar

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Peter
Parrish
Sent: Thursday, January 14, 2010 11:43 AM
To: 'RE-wrenches'
Subject: [RE-wrenches] Investment Tax Credit

 

I have two questions about the Investment tax Credit (ITC). 

 

(1) I understand that it has an expiration date of December 31, 2010. If
this is true, is it probable that it will be extended for another year or
more? Asked another way, what are the chances that it will be allowed to
expire?

(2) Is it true that the project must only be started (e.g. installation
actually started) before the end of the year to qualify?

 

If this post should be on the Marketing list, I apologize in advance!

 

- Peter

 

Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP T Cert. 031806-26
 mailto:peter.parr...@calsolareng.com peter.parr...@calsolareng.com  
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885


 

 

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Re: [RE-wrenches] solar hot water nighttime recirc

[Conrad Geyser]

We use chrome oxide collectors exclusively.  

 

What I'm getting at is that the system will satisfactorily self regulate.
Just from all the combined parasitic losses, a typical flat plate system
will top out around 180F max.tank temp. in an average summer climate even
without nighttime heat dumping.   Night time heat dumping is nice way to
bring that number down more in a case of limited occupancy / overproduction.
Here in the Northeast, more often than not, residences have basement
dehumidifiers running all summer.  If that is the case and there isn't
significant AC being used, we tend to use a basement heat loop for the
excess heat.  Again, no numbers, but any thermal load that can help against
a giant electrical dehumidification one is a gain.

 

An evacuated tube system needs more sophisticated top heat regulation. 

 

Conrad

Cotuit Solar  

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of
m...@hurshtown.com
Sent: Friday, December 18, 2009 10:26 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] solar hot water nighttime recirc

 

I was once told that the best collector used black chrome plated on bright
nickel.  

This combination absorbs heat well, with the advantage of not letting the
heat back out.  

Sort of a thermal diode of sorts.

I have no data, but I believe good collectors radiate less than they
collect.

 

Mark

 Original Message 
Subject: Re: [RE-wrenches] solar hot water nighttime recirc
From: Carl Emerson freepo...@freepower.co.nz
Date: Fri, December 18, 2009 10:04 pm
To: 'RE-wrenches' re-wrenches@lists.re-wrenches.org

Hi there gang,

 

Just to say that IMHO solar thermal panels will radiate quite a bit less
than they collect, someone must have some data on this ??

 

Have a great Christmas.

 

Carl Emerson

Free Power Ltd.

Web   www.freepower.co.nz

 


  _  


From:re-wrenches-boun...@lists.re-wrenches.org [
mailto:re-wrenches-boun...@lists.re-wrenches.org
mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Conrad Geyser
Sent: 18 December 2009 5:42 p.m.
To: npon...@buildingenergyus.com; 'RE-wrenches'
Subject: Re: [RE-wrenches] solar hot water nighttime recirc

 

Nicholas,

 

You can certainly do that.  Most newer controllers have a vacation
function that will provide this.  Another method is to put in a bypass to
the check valve that you can open and the system will naturally reverse
thermo siphon at night.  Not much in the way of calculations other than the
collectors reradiate as effectively as they collect.

 

Conrad

Cotuit Solar

 


  _  


From:re-wrenches-boun...@lists.re-wrenches.org [
mailto:re-wrenches-boun...@lists.re-wrenches.org
mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Nicholas
Ponzio
Sent: Wednesday, December 16, 2009 10:54 PM
To: RE-wrenches
Subject: [RE-wrenches] solar hot water nighttime recirc

 

Apologies if this has already been discussed here.

One heat diversion method I hear suggested often is recirculating through
the collectors (flatplate) at night. Are there any data, calculations or
anecdotal evidence on the effectiveness of this approach? That is, can I
really radiate as much energy back to a dark sky as I collect during the
day?

Thanks for any feedback.



__ NOD32 4697 (20091217) Information __

This message was checked by NOD32 antivirus system.
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Re: [RE-wrenches] solar hot water nighttime recirc

[Conrad Geyser]

Nicholas,

 

You can certainly do that.  Most newer controllers have a vacation
function that will provide this.  Another method is to put in a bypass to
the check valve that you can open and the system will naturally reverse
thermo siphon at night.  Not much in the way of calculations other than the
collectors reradiate as effectively as they collect.

 

Conrad

Cotuit Solar

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Nicholas
Ponzio
Sent: Wednesday, December 16, 2009 10:54 PM
To: RE-wrenches
Subject: [RE-wrenches] solar hot water nighttime recirc

 

Apologies if this has already been discussed here.

One heat diversion method I hear suggested often is recirculating through
the collectors (flatplate) at night. Are there any data, calculations or
anecdotal evidence on the effectiveness of this approach? That is, can I
really radiate as much energy back to a dark sky as I collect during the
day?

Thanks for any feedback.

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Re: [RE-wrenches] Federal Tax Credit Grants for Businesses

[Conrad Geyser]

Ryan,

 

It seemed to us that the stamped plan really could have been electrical or
mechanical.  We submitted electrical.  It doesn't seem to be a comprehensive
review process, just some validation of the installation.  The third party
commissioning consisted of a letter drafted by us and signed by the inverter
manufacturer( they had online production tracking) in one case and the
turbine manufacturer(factory rep. had seen the installation) in another.

 

Good luck!

 

Conrad

Cotuit Solar

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ryan
Mayfield
Sent: Monday, December 14, 2009 4:30 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Federal Tax Credit Grants for Businesses

 

Conrad,

 

Did they require electrical stamped drawings only or structural too?

 

Ryan

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Conrad
Geyser
Sent: Saturday, December 12, 2009 9:56 AM
To: 'RE-wrenches'
Cc: 'Katie Kehrl'
Subject: Re: [RE-wrenches] Federal Tax Credit Grants for Businesses

 

Kirpal,

 

We have just received notification and payment for our first two
applications which went in during the first week of the program.

 

They did require engineered stamped plans and a third party commissioning
report which we weren't initially aware of and supplied later.

 

Good luck!

 

Conrad

Cotuit Solar

 

 

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirpal
Khalsa
Sent: Friday, December 11, 2009 1:17 PM
To: RE-wrenches
Subject: [RE-wrenches] Federal Tax Credit Grants for Businesses

 

Hi All..just wanted to see if any of you have been having success with
applying for and recieving the federal tax credit grant for commercial
systems.what kind of time frames have they been following from
application to payout, have they been requiring any unforseen engineering
reports or other unexpected documentation?
We have a few applications we are about to submit and want to make sure we
are as efficient as possible.we heard of one solar customer who was
given 21 days to come up with a engineering report on a project that was
relatively small home based roof mounted business.none of the local
jurisdictions required engineering reports for that project so now a report
could have to be commissioned..
I am just trying to plan for any unexpected requirements ahead of time
Thanks for any advice! 


-- 
Sunny Regards,
Kirpal Khalsa
NABCEP Certified Solar PV Installer
Renewable Energy Systems
www.oregonsolarworks.com
541-218-0201 m
541-592-3958 o

No virus found in this incoming message.
Checked by AVG - www.avg.com
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19:37:00

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Re: [RE-wrenches] Federal Tax Credit Grants for Businesses

[Conrad Geyser]

Kirpal,

 

We have just received notification and payment for our first two
applications which went in during the first week of the program.

 

They did require engineered stamped plans and a third party commissioning
report which we weren't initially aware of and supplied later.

 

Good luck!

 

Conrad

Cotuit Solar

 

 

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirpal
Khalsa
Sent: Friday, December 11, 2009 1:17 PM
To: RE-wrenches
Subject: [RE-wrenches] Federal Tax Credit Grants for Businesses

 

Hi All..just wanted to see if any of you have been having success with
applying for and recieving the federal tax credit grant for commercial
systems.what kind of time frames have they been following from
application to payout, have they been requiring any unforseen engineering
reports or other unexpected documentation?
We have a few applications we are about to submit and want to make sure we
are as efficient as possible.we heard of one solar customer who was
given 21 days to come up with a engineering report on a project that was
relatively small home based roof mounted business.none of the local
jurisdictions required engineering reports for that project so now a report
could have to be commissioned..
I am just trying to plan for any unexpected requirements ahead of time
Thanks for any advice! 


-- 
Sunny Regards,
Kirpal Khalsa
NABCEP Certified Solar PV Installer
Renewable Energy Systems
www.oregonsolarworks.com
541-218-0201 m
541-592-3958 o

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Re: [RE-wrenches] concord batteries, EQUALIZE Them!

[Conrad Geyser]

Thanks for the amazing responses everyone!

 

Larry, it sound as though the parameters below are a perfect match for your
average ~180 watt PV module in December sunlight wired back through a diode
to a test battery inside?  Does it matter if the process get's interrupted
by a few nights / cloudy days?  Do you have a preferred test approach?

 

Yeah, this bank represents a huge amount of resources; I want to make sure
it can't be saved.

 

Conrad

Cotuit Solar 

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Larry
Crutcher, Starlight Solar
Sent: Monday, November 30, 2009 11:17 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] concord batteries, EQUALIZE Them!

 

Conrad,

 

We have sold many Concord (Lifeline, Sun Xtender...) batteries over the
years. They are the best and half of our battery sales are Deka and Concord
AGM's.

 

When our mobile customers abuse their AGM batteries, I use an equalization
process that has a constant current and no voltage limit to restore them. I
am sure you have heard that you should never equalize an AMG battery. This
is not true but the process must be tightly controlled. I have done it many
times and the result is always to recover some or most capacity. 

 

Do one battery at a time.

1. Battery temp: 77 degrees (+/-5) and stable

2. Apply charge current limited to 5% of the 20hr rate. eg. 220 AH will be
11 amps. Do not regulate voltage!

3. Monitor temperature and voltage.

4(a) If temperature reaches 130F, stop the process. Start again when the
battery temperature has been lowered to room temperature.

4(b) When voltage reaches 2.6 vpc, continue charging for 4 hours. Voltage
may reach 3 vpc!!  Follow 4(a) about temp.

5. After this process, perform a capacity test. 

 

This has worked for me with chronically undercharged AGM's of all types. I
have never had one vent or go into thermal run away. At the price of these
batteries, it is worth the time to try if you have the power source and
time.

 

For reference this process is outlined in the Lifeline Technical manual,
page 20. http://www.lifelinebatteries.com/manual.pdf

 

Larry Crutcher

www.starlightsolar.com

la...@starlightsolar.com

(928) 941-1660

 

On Nov 29, 2009, at 6:48 PM, Conrad Geyser wrote:





In the vein of us on grid folks who's heads spin when the off grid folks
start talking about charge programming and gen set start up parameters.

 

I am servicing an orphaned 48 V off grid system that is only 1 1/2 years
old, with 40 Concorde Sun Extender batteries, which are for the most part,
shot (about half of them under 10V after a generator EQ charge).  I'm sure
the batteries have been abused at least after the point that someone lowered
the generator start voltage to 40V.  We're still doing fact finding on the
charge parameters for the PV and wind, but I'm wondering if there is anyone
that has an opinion on the Concorde batteries.

 

And at least at this point, I'm glad I had to study for some off grid
questions on the NABCEP test, not to mention the conversations on this list.
: 

 

Conrad

Cotuit Solar

 

 

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Bob-O
Schultze
Sent: Wednesday, November 25, 2009 9:59 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Nabcep - grid tie---Off grid

 

William,

Nice to meet you -however briefly- at the Solar Zoo in Anaheim.

If you don't see the value in being NABCEP certified, then you shouldn't
bother with it. If your state- as more than a few have- decides to recognize
it in some way that affects your pocket, then you'll likely change your mind
PDQ. I've personally gotten one or two jobs that I know about because I was
Certified and the other bidder was not, but our bids were very close in
price. Low-ballers, like head lice, are just a nasty fact of life.

While I generally agree with you on your point #2, it varies a lot state to
state. I'm licensed in CA and OR. While I understand the rules in CA are
changing, enforcement is, and has always been, a joke. In OR, you need a
4000 hour apprenticeship AND 256 hours of general electrical classroom time
to get a Renewable Energy license. A general journeyman license is twice
that. I've had inspectors come to our job site and check that everyone is
licensed. In OR, you don't lay hands on a wire without a license. Ever hear
of the like in CA? Maybe in the big cities, but nowhere else.

We're totally on the same page about the IBEW. If you understand that their
goal is total domination of the electrical trade everywhere, a lot of how
they operate makes sense. I'm a pro-Union kinda guy as a rule, but, like
religion, too much of a thing is way worse than none.

As to experience with EMT and the like, again it varies state to state and
certainly region to region. In this neck of the woods, if you can't bend an
offset or saddle bend, you are either a new apprentice

[RE-wrenches] concord batteries

[Conrad Geyser]

In the vein of us on grid folks who's heads spin when the off grid folks
start talking about charge programming and gen set start up parameters.

 

I am servicing an orphaned 48 V off grid system that is only 1 1/2 years
old, with 40 Concorde Sun Extender batteries, which are for the most part,
shot (about half of them under 10V after a generator EQ charge).  I'm sure
the batteries have been abused at least after the point that someone lowered
the generator start voltage to 40V.  We're still doing fact finding on the
charge parameters for the PV and wind, but I'm wondering if there is anyone
that has an opinion on the Concorde batteries.

 

And at least at this point, I'm glad I had to study for some off grid
questions on the NABCEP test, not to mention the conversations on this list.
: 

 

Conrad

Cotuit Solar

 

 

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Bob-O
Schultze
Sent: Wednesday, November 25, 2009 9:59 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Nabcep - grid tie---Off grid

 

William,

Nice to meet you -however briefly- at the Solar Zoo in Anaheim.

If you don't see the value in being NABCEP certified, then you shouldn't
bother with it. If your state- as more than a few have- decides to recognize
it in some way that affects your pocket, then you'll likely change your mind
PDQ. I've personally gotten one or two jobs that I know about because I was
Certified and the other bidder was not, but our bids were very close in
price. Low-ballers, like head lice, are just a nasty fact of life.

While I generally agree with you on your point #2, it varies a lot state to
state. I'm licensed in CA and OR. While I understand the rules in CA are
changing, enforcement is, and has always been, a joke. In OR, you need a
4000 hour apprenticeship AND 256 hours of general electrical classroom time
to get a Renewable Energy license. A general journeyman license is twice
that. I've had inspectors come to our job site and check that everyone is
licensed. In OR, you don't lay hands on a wire without a license. Ever hear
of the like in CA? Maybe in the big cities, but nowhere else.

We're totally on the same page about the IBEW. If you understand that their
goal is total domination of the electrical trade everywhere, a lot of how
they operate makes sense. I'm a pro-Union kinda guy as a rule, but, like
religion, too much of a thing is way worse than none.

As to experience with EMT and the like, again it varies state to state and
certainly region to region. In this neck of the woods, if you can't bend an
offset or saddle bend, you are either a new apprentice or unemployed.

Best, Bob-O

 

On Nov 24, 2009, at 11:48 PM, William Miller wrote:

 

Friends:

I'd like to make two brief points on the training/NABCEP debate:

1. If I thought NABCEP certification would get me one more job I'd normally
lose to a low-ball bidder, I'd be inclined to sit for the test, but it
won't.

2. Most solar electric installers could not be considered electricians.
Until they learn the trade, they are not qualified to install the most basic
grid tie system.  Conversely, many electricians with the most basic
electrical skills think they know all that needs to be known to design and
install solar-electric.  Wrong again.

I don't support the IBEW concept of taking over the solar industry by force,
but I do respect their concept of actually encouraging well rounded
electrician's skills.  How many solar installers can actually lay an offset
into a stick of EMT?  Not many.  Most are glorified stereo installers,
plugging and praying.

Respectfully,

William Miller

 

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Re: [RE-wrenches] raintite box mounting angle

[Conrad Geyser]

We always fill any conduit at the point of building penetrations for air
sealing.  Otherwise in winter, not only will the conduit get house moisture
condensing inside of it, but it will act a a nice thermo siphon for pulling
warm air out of the house...

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Wind-sun.com
Sent: Tuesday, August 25, 2009 11:49 AM
To: jry...@netscape.com; RE-wrenches
Subject: Re: [RE-wrenches] raintite box mounting angle

 

It is almost impossible in a normal installation to get a totally waterproof
enclosure.

 

What you describe with the flooded box is more common than people might
think. 

 

What causes most of that is condensation. Humid air gets sucked into the
enclosure at night or whenever else it cools off. The water then condenses
inside. Next day, the box heats up again and the air expands a bit again,
but the water has already condensed and cannot get out.

 

That is why the weep hole as you noted is mandatory, especially in areas
with high humidity. But we have seen this even in the desert regions of
Arizona and CA, so it can happen anyplace over long periods of time.

 


..
Northern Arizona Wind  Sun - Electricity From The Sun Since 1979
Solar Discussion Forum: http://www.wind-sun.com/ForumVB/

..

- Original Message - 

From: Jeff Yago mailto:jry...@netscape.com  

To: k...@vtsolar.com ; RE-wrenches
mailto:re-wrenches@lists.re-wrenches.org  

Sent: Tuesday, August 25, 2009 8:40 AM

Subject: Re: [RE-wrenches] raintite box mounting angle

 


I am getting more convinced that there is no such thing as a water-tight
electrical enclosure, regardless of gasket covers and sealed openings.  We
always drill a very small weep-hole in the bottom of an enclosure.   We
have found this is too small to allow insects to enter, but will drain any
leaks or moisture that gets condensed into a liquid.  I was recently called
by the owner of a large pole mounted array (that was installed by another
firm ) when the system stopped working and the originally installer was long
gone.   I absolutely swear to you that when I pulled the covers off several
electrical junctions boxes, water POURED out of the enclosures!   I am not
talking about wet, I am saying about a quart of water was being held inside
each enclosure by their water-proof gasketed covers.  Needless to say, all
of the electrical terminals and wire connectors inside these junction  boxes
were badly corroded.

 

I know they make totally water-proof electrical equipment for under-water
applications, but have found most outdoor rated electical enclosures will
get some water inside and that includes under-ground conduit.   Take some
advice and regardless of mounting orientation, drill a small weep-hole in
the bottom if there is not one provided by the manufacturer.

 

Jeff Yago

DTI Solar

 

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[RE-wrenches] Oscilloscope

[Conrad Geyser]

Esteemed Wrenches,

We haven't talked oscilloscopes since 2007.  We have a Nantucket Fronius
inverter that is telling us there is an AC frequency problem.  It seems
feasible that there is a frequency issue way out there and that we better
check that.  

Any reviews on the Velleman handheld (or any other)oscilloscope?

http://www.kitsusa.net/phpstore/html/VELLEMAN-HPS10SE---PERSONAL-SCOPE-10MSs
---SPECIAL-EDITION-1485.html

thanks,

Conrad
Cotuit Solar

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Re: [RE-wrenches] Solar Magic

[Conrad Geyser]

I was having a conversation with Michael Rogol from Photon yesterday and his
only concern was the life expectancy.  They are testing them.

Other than that they are working as far as overcoming intermittent shading.

Conrad Geyser

Cotuit Solar

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Joel
Davidson
Sent: Friday, June 19, 2009 7:45 PM
To: RE-wrenches
Subject: [RE-wrenches] Solar Magic

 

(I'll change the subject.) I have some clients with shading problems that
may be potential Solar Magic retrofits. I've been to National
Semiconductor's presentation and was impressed with their demonstration and
professionalism. Does anyone have Solar Magic experience to share with us?

Joel Davidson

- Original Message - 

From: Wilco mailto:w.vercoe...@dommelvalley.ca  Vercoelen 

To: 'RE-wrenches' mailto:re-wrenches@lists.re-wrenches.org  

Sent: Friday, June 19, 2009 3:55 PM

Subject: Re: [RE-wrenches] Enphase Recall?

 

An alternative could be using the Solar Magic with a string inverter
reducing shading efficiency losses. Provide easy monitoring and you still
would be able to keep your client happy. ;)

Just a thought.

Kind regards,
Wilco Vercoelen
President

new-logo-email.gif
Dommelvalley Green Power Inc.
Solar Energy Solutions
Utopia, Ontario, Canada
 http://www.dommelvalley.ca http://www.dommelvalley.ca
Tel. 705-423-9699
Fax. 705-423-9880
Toll Free 1-877-889-7657

This e-mail message is intended only for the person or entity to which it is
addressed and is confidential, subject to copyright and may be legally
privileged. Any unauthorized review, use or disclosure is prohibited.  If
you received this in error, please contact the sender and delete all copies
of the e-mail together with any attachments.

 


  _  


From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Mark Frye
Sent: June-19-09 18:38
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Enphase Recall?

 

Here is my experience with bringing in the Enphase:

 

Week 0: First contact with a customer that can benefit from micro inverter
application (site visit); Check with vendor - out of stock with 2 week lead
time

Week 1: Develop design specificiation and bid incorporating Enphase micro
inverter; bid presentation

Week 2: Customer selects my bid out of a pool of three competevive bids,
other two bids string inverters, wants to sign contract and start work
immediately.

Week 2 plus One Day: Before contract signing check in with vendor; Enphase
still completely out of stock and lead time is now 12 WEEKS..shock,
heart attack, knowing I am going to lose the job (could have bid a string
inverter), how can I face my customer now?.

 

I ended up getting a line on the inverters I needed with a 6 week
leadtime, taking that to my customer and winning the job.  We are both now
waiting to see if the alternate vendor will deliver the product as promised.

 

The main thing that went thorough my mind was, I thought we got over this
kind of thing with the module supply shortage, but it's deja vu all over
again.

 

Enphase may be diligent in managing quality during production ramp-up.
However, going from 2 weeks to 12 weeks leadtime in 2 weeks is no way to
manage customer expectation.

 

In my mind it's a black eye for Enphase. I am hoping that they will win a
feather back into their cap with an on time delivery of a stellar product.


Mark Frye 
Berkeley Solar Electric Systems 
303 Redbud Way 
Nevada City,  CA 95959 
(530) 401-8024 
 http://www.berkeleysolar.com/ www.berkeleysolar.com  

 

 


  _  


From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Bill Brooks
Sent: Friday, June 19, 2009 2:58 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Enphase Recall?

Peter and all,

 

The Enphase product is the only one of its kind on the market currently
(there will be more). Their sales are far beyond where they thought they
were going to be-good and bad news. Great for them to be confirmed in their
market prediction. Bad for the people who are anxious to get the product.

 

Many companies simply ramp up production and hope for the best. It is my
impression that this is not what Enphase is doing. They are trying to
carefully control production.

 

If you are making sales based on the benefits and availability of the
Enphase product alone, that is probably bad business. Until the Enphase
product is widely available, I would recommend that you continue to use the
product wisely in specific locations where it will clearly outperform any
other option. If you are using the Enphase product where another mature
available product will do, you are not using your head or applying the
limited quantity of available product wisely. 

 

Continue to move with measured caution. The product looks good, but it is
not a silver bullet. Don't push

[RE-wrenches] perimeter guards?

[Conrad Geyser]

Anybody willing to share their thoughts / devices on a guard around the
edges of arrays to stop animals from nesting in there?

Thanks,

Conrad
Cotuit Solar

-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay peltz
Sent: Sunday, April 12, 2009 6:19 PM
To: RE-wrenches
Subject: [RE-wrenches] wireless routers for off grid

Hi All,

Im wondering if there are any recommendations for wireless routers  
for an off grid application.

The application is mine.

I've used Apple airports for some years with lots of problems.  I've  
had 2 now 3 go bad, and well enough is enough.

So I'm looking for something that A works, B efficient, and C isn't an  
Apple.

Any suggestions?

thanks,

jay

peltz power

Powered by Outback.


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Re: [RE-wrenches] Solar Installers Association

[Conrad Geyser]

Hi all,

SEBANE, Solar Energy Business Association of New England, which is an
ongoing concern, would fit the parameters of the national trade association
that you describe.  I support SEBANE and would also support a national
organization.

Ken, you have to be a little careful with CommonWealth Solar as it also
happens to be the name of the Massachusetts state PV incentive program,
without the capitalized W.  It was this agency under a prior name that
provided the seed money for SEBANE, so I guess you might say that they too
support a trade organization!

Conrad
Cotuit Solar



-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ken Schaal
Sent: Saturday, February 14, 2009 3:34 PM
To: jry...@netscape.com; RE-wrenches
Subject: Re: [RE-wrenches] Solar Installers Association

Count CommonWealth Solar among those supporting this effort.
Don't most of these groups support themselves with various business 
offerings? Like contracts and insurance ? Priority 1 ?

Thanks for stirring this up.

Ken Schaal



- Original Message - 
From:  Jeff Yago jry...@netscape.com
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Sent: Saturday, February 14, 2009 2:20 PM
Subject: Re: [RE-wrenches] Solar Installers Association


I think bringing life back into this early start of a solar association is 
a very good idea. As a first step, I have been working on a suggested 
installers contract and have already received emails from many on this list

with suggestions and prior horror stories that could have been avoided with

better contract clauses.

 I do not have time to start a new association by myself, but can either 
 help others get this going, or wait until next year when many of my 
 current project obligations should lighten up.  I also have a friend that 
 may soon have her job elliminated at a national trade asociation due to a 
 major drop in their membership, and she has far more experience than me in

 the day to day issues of keeping a trade organization going.  This might 
 be a good fit once this thing gets started and can stand on its own.

 Anyone else want to help me make this happen?

 Jeff Yago

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Re: [RE-wrenches] Federal Tax Credits for Nonprofits

[Conrad Geyser]

Howie,
If you have the tax appetite, just own the system yourself for 5 years,
charging the site for production.  After five years, sell it to them for
whatever balance you need to get to make the numbers work.  As a solar
installer you can do this without many legal hoops.

Other than that you are stuck forming a small PPA LLC and finding an
investor with passive gains to offset.  10 KW is probably too small to be
worthwhile.  If it was 20 KW, that might work.

Conrad
Cotuit Solar

-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Howie
Michaelson
Sent: Thursday, January 29, 2009 10:56 AM
To: re-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] Federal Tax Credits for Nonprofits

Hi All,

Does anyone know of a way that a nonprofit could take advantage of the ITC
on a relatively small gridtie (10 kW)?  The only way I know of is if there
is an historical building involved, but this seems only useful for much
larger projects because of the administrative costs involved in pursuing
this angle.

TIA,
Howie
-- 
Howie Michaelson
NABCEP Certified Solar PV InstallerT

Sun Catcher, LLC
Renewable Energy Systems Sales and Service
VT Solar  Wind Incentive Program Partner
http://www.SunCatcherVT.com
(cell) 802-272-0004
(home) 802-439-6096





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Re: [RE-wrenches] Sample Power Purchase Agreements

[Conrad Geyser]

Carl,

 

We have been working on a small (20 KW) PPA which I'll call a partial pay
model.  The main advantage is that it transfers tax credits for the
non-profit / municipality.  They end up getting as much as 50% more KW
(Massachusetts) than they would otherwise and the investor ends up making a
good return. 

 

There are lots of accounting and SEC rules that need to be addressed, but it
appears to be within the scope of feasibility.

 

Happy to share details but don't have much time until after the New Year and
don't have formation papers yet.

 

Best,

Conrad

Cotuit Solar 

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Carl Adams
Sent: Monday, December 15, 2008 9:51 PM
To: RE-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] Sample Power Purchase Agreements

 

Hello All,

I'm interested in sample PPAs.  I'd like to set one of these up for a local
non-profit customer and would appreciate any examples, etc you are willing
to share

With REgards
Carl Adams
NABCEP Certified Installer 

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[RE-wrenches] Electricians liability certificate

[Conrad Geyser]

Esteemed colleagues,

 

Having just hired a licensed electrician for our renewable energy company we
find that he cannot use our liability insurance to cover him on pulling
electrical permits here in Massachusetts.  It seems that he has to have his
own certificate despite being listed as an electrician under our liability
policy.

 

Any insights?

 

Thanks,

Conrad

Cotuit Solar

 

  _  

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Allan
Sindelar
Sent: Wednesday, December 10, 2008 3:16 PM
To: 'RE-wrenches'
Subject: [RE-wrenches] Module Voltage Question for Off-Grid Designers

 

Wrenches, 
Here's an issue I haven't seen directly addressed, and I would like to know
what the rest of you are doing. 
It's getting harder to get 24V nominal modules. Because the bulk of industry
growth is high-voltage grid-tied applications, modules no longer have to be
a standard voltage. Just pick the number of modules to best fit the chosen
inverter's string voltage range.

But for off-grid, the odd cell counts and resulting nontraditional DC
input voltages challenge the traditional rules of off-grid design. I may be
fighting a losing battle here, as the industry changes so rapidly and
fundamentally. I have been trying to stay with 72-cell modules for offgrid,
as this most readily combines with existing systems with 36-cell modules
(12V) and 72-cell modules (24V). 

For example, I will use the new Canadian Solar 170-200W modules. They are
60-cell modules, with a Vmppt of around 28 volts - too low to charge 24V
batteries with a standard charge controller. We can use them in any new
systems with an MX60 or similar voltage-converting MPPT controller. Two or
three in series would charge a 24V battery; 3 in series would charge 48V.
Four in series would violate Code, as low-temp voltage would easily exceed
150V. 

Unless 60-cell modules remain a standard in the future, any future array
additions would have to be on their own charge controller, in order to match
a different I-V curve and MPP voltages into the same battery bank. Is this
prohibitive? No, it just runs counter to the longstanding standards of
off-grid design that allow modules to be added in the future: these modules
will not add well to existing systems, and will not easily allow additional
dissimilar modules to be added later. 

I had this same objection to using Day4 modules, although they were better
at 16Vnom. Three made up a standard 48V array, so strings could be combined
with two-module strings of similar 24Vnom modules.

Who else is trying to stay with 24V modules? Anyone still using 12V modules
in off-grid (residential-scale, not little apps) designs? Who has a crystal
ball and knows what modules will be like in 20 years, or even two years? Wat
are the rest of you doing?

Thanks, as usual. 
Allan 
Allan Sindelar 
 mailto:al...@positiveenergysolar.com allan_(at)_positiveenergysolar.com 
NABCEP certified solar PV installer 
Positive Energy, Inc. 
3225A Richards Lane 
Santa Fe NM 87507 
505 424-1112 

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Re: [RE-wrenches] tankless hot water and pumping question

[Conrad Geyser]

Hey Ian,
The key is that you want temperature modulated, not flow modulated.
There are a number of temperature modulated units out there, the Rinnai and
Takagi probably being the most popular.  We have had one problem with a
solar preheat through one of these and that is if the solar water is pretty
close (around 115 or so) the unit doesn't come on.  The factory settings
don't let you take the temperature higher than 125 to try to overcome this.
Both the Rinnai and Takagi have electric ignition, no pilot!
Cheers,
Conrad
Cotuit Solar

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ian
Woofenden
Sent: Friday, November 14, 2008 12:05 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] tankless hot water and pumping question


Hi Todd and all,

Since this is a renewable energy list, I think it's worth mentioning 
that installing a modulating demand heater will make the installation 
solar ready.

I'm only aware of one tankless heater that accepts pre-heated water 
and has no electrical usage, and that's the Bosch 1600PS (which I 
live with). I'd love to know if there are others, since this is a 
common need in off-grid systems. Some of the other modulating heaters 
on the market have significant electrical demand, which is a deal 
breaker for us poor off-gridders.

Ideally, we'd have such a unit that doesn't have a standing pilot, 
but I've never heard of such a product, though there are 
non-modulating heaters that run on piezo igniton and a couple of 
D-cells. Bosch's hydro unit is a neat concept, but it's not 
modulating.

I hope others will share their knowledge and experience.

Ian


-- 
Ian Woofenden [EMAIL PROTECTED], Senior Editor, Home Power
magazine
Subscriptions: $24.95 per year PO Box 520, Ashland, OR 97520 USA 
800-707-6585 (US), 541-512-0220
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Re: [RE-wrenches] hydro coils

[Conrad Geyser]

Todd / Wrenches:

For what it’s worth:

My favorite woodstove hookup is a thermo siphon feed as done in days of old.
This is self regulating and worry free.  My oldest one has been going for
~25 years.  Just use all threaded joints anywhere near the stove!  In
firebox HX  I’d average 24” of ¾” brass per person for a full time
woodstove.  A scraper arrangement to clean off deposits can make a big
difference if more BTUs are needed. 

Conrad

Cotuit Solar 

 

  _  

From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Travis
Creswell
Sent: Thursday, November 06, 2008 10:01 AM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] hydro coils

 

Assuming you’re talking about the units that actually installed in the fire
box; I’ve actually disconnected a few over the years because they overheated
the water to point of regularly blowing the pop off valve of the domestic
hot water heater.  It’s pretty spooky to rely on the PT valve in that
manner.  These were retired folks that didn’t use much hot water and plenty
of time to keep the wood stove stoked.  Hyrdo Coils (etc) would probably
work OK for an installation that didn’t keep the wood stove going 24hrs/day,
used plenty of hot water and had a very attentive owner.

 

But to answer Todd’s question.  I haven’t seen a new one for long time.
Seems like I’ve seen a few NOS ones on Ebay and in the dusty corners of wood
stove dealers.  There was a product that actually installed on the outside
of the firebox in such a manner that the heat was conducted to it.  I don’t
remember who made it and it’s been years since I’ve seen it.  Of course it
wouldn’t be near as efficient but that would be a good thing in this case
plus it didn’t void the stoves warranty because you didn’t have to drill any
holes into the stove.

 

Best,

Travis Creswell

Ozark Energy Services

 

 

  _  

From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Thursday, November 06, 2008 8:40 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] hydro coils

 

Todd,

Just a friendly point - I know you probably know---be real careful doing
that. That use to be an option on some of the woodstoves I sold 25 years ago
until,.BOOM! ..DIY not recommended. 

 

Holt E. Kelly
Holtek Fireplace  Solar Products
500 Jewell Dr.
Waco,Tx. 76712
254-751-9111
254-228-9621 (cell)
[EMAIL PROTECTED]

www.holteksolar.com


 

- Original Message - 

From: Todd mailto:[EMAIL PROTECTED]  Cory 

To: re-wrenches@lists.re-wrenches.org 

Sent: Wednesday, November 05, 2008 11:57 PM

Subject: [RE-wrenches] hydro coils

 

I have a client that is wanting to add a water loop in their wood stove. 
Does anyone know if the old SS hydro coils are still made?

Todd

-- 




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Re: [RE-wrenches] Apollo T80 hardware

[Conrad Geyser]

Sounds like a lot of Apollo swap outs.  We're considering one 'cause of the 
higher voltage...  How have they been holding up?

Conrad
Cotuit Solar
- Original Message - 
From: John Raynes [EMAIL PROTECTED]

To: RE-wrenches re-wrenches@lists.re-wrenches.org
Sent: Wednesday, July 30, 2008 5:00 PM
Subject: [RE-wrenches] Apollo T80 hardware


For those wrenches supporting Apollo T80's I have two units and a wireless 
display available for sale.  One of the T80's was in the field for a year 
before it was pulled and replaced with a different controller.  It needs 
firmware upgrades.  The other T80 is a recent factory re-build, never 
started up by me.  The wireless display has only been used briefly in my 
shop.


Contact me off-list if you have any interest.

Regards,
John Raynes
RE Solar
Torrey UT
435-425-2110

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