Re: [RE-wrenches] Fed Tax Credit
We've never had a problem with this approach. Then again, we've never had a client get audited, to my knowledge, and that, I imagine, will be where the rubber finally hits the road. Eric Stikes GoodSun Solar A 501(C)(3) CA. Non-profit Corp. NABCEP PV Pro 001.530.798.3738 (cell) www.GoodSun.life [sent via pigeon...or cell phone] > On Oct 31, 2015, at 3:32 PM, jay wrote: > > I thought the ITC was all types of solar products? >> On Oct 31, 2015, at 11:28 AM, Drake >> wrote: >> >> I talked to my tax accountant. She had never had come across anything that >> would indicate that it would be a problem. Has anyone had customers that did >> or didn't have issues? >> >> Thanks, >> >> Drake >> >> >> >> At 01:57 PM 10/30/2015, you wrote: >>> Content-Language: en-US >>> Content-Type: multipart/alternative; >>> >>> boundary="_000_CY1PR15MB0567306710E7580F88273F5DE32F0CY1PR15MB0567namp_" >>> >>> Talk to your tax advisor (or have the customer talk to theirs). Dont ever >>> give out tax advise (unless youre licensed to) as it opens you to >>> liability should you give them the wrong advise and they get audited by the >>> IRS. >>> >>> From: RE-wrenches [ mailto:re-wrenches-boun...@lists.re-wrenches.org] On >>> Behalf Of Drake >>> Sent: Friday, October 30, 2015 12:01 PM >>> To: re-wrenches@lists.re-wrenches.org >>> Subject: [RE-wrenches] Fed Tax Credit >>> >>> Hello Wrenches, >>> >>> Is it permissible to take the the tax credit on the batteries and backup >>> inverter of an AC coupled system when the system would be capable of >>> feeding the grid without the backup inverter and the batteries? >>> >>> Thank you, >>> >>> Drake >>> >>> Drake Chamberlin >>> Athens Electric LLC >>> OH License 44810 >>> CO License 3773 >>> NABCEP Certified Solar PV >>> 740-448-7328 >>> http://athens-electric.com/ >>> >>> ___ >>> List sponsored by Redwood Alliance >>> >>> List Address: RE-wrenches@lists.re-wrenches.org >>> >>> Change listserver email address & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> List-Archive: >>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >>> >>> List rules & etiquette: >>> www.re-wrenches.org/etiquette.htm >>> >>> Check out or update participant bios: >>> www.members.re-wrenches.org >> ___ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] PV Tracker - Best available?
This was my first recommendation to the client, to avoid tracking. But they really want a tracker (they're trying to keep up with their neighbors who have one). My engineer steered me to GMI trackers and those look very robust but are too pricey for this client. Eric Stikes GoodSun Solar A 501(C)(3) CA. Non-profit Corp. NABCEP PV Pro 001.530.798.3738 (cell) www.GoodSun.life [sent via pigeon...or cell phone] > On Oct 3, 2015, at 12:04 PM, Starlight Solar Power Systems > wrote: > > Hello Eric, > > With the low cost of PV solar modules, I would like to know why anyone would > choose to track the sun? It cost's much more and is a maintenance issue > compared to adding more PV modules to make up the difference. Tracking winter > gain is about 10% and summer about 40%. If there is no space available for > more PV it makes sense if you must have more production. > > Larry Crutcher > Starlight Solar Power Systems > > > > On Oct 3, 2015, at 9:49 AM, SunHarvest wrote: > > Given 310# snow load in the Sierras, what are some suggestions for a superior > pole-mounted tracking system? Right now I'm considering DHSolar, but I'm > unfamiliar with the product. > > Eric Stikes > GoodSun Solar > A 501(C)(3) CA. Non-profit Corp. > NABCEP PV Pro > 001.530.798.3738 (cell) > www.GoodSun.life > [sent via pigeon...or cell phone] > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
[RE-wrenches] PV Tracker - Best available?
Given 310# snow load in the Sierras, what are some suggestions for a superior pole-mounted tracking system? Right now I'm considering DHSolar, but I'm unfamiliar with the product. Eric Stikes GoodSun Solar A 501(C)(3) CA. Non-profit Corp. NABCEP PV Pro 001.530.798.3738 (cell) www.GoodSun.life [sent via pigeon...or cell phone] ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Hazards of underground feeders
Sorry to hear about that tragedy William. As a volunteer firefighter, (and of course a huge proponent of solar safety), I'm 100% supportive of, and encourage the use of "rapid" shut-down right at the module. Eric Stikes Founding Director, GoodSun Solar A 501(C)(3) CA. Non-profit Corp. 001.530.798.3738 (cell) www.GoodSun.life [sent via pigeon...or cell phone] > On Sep 6, 2015, at 11:35 AM, jay peltz wrote: > > Dear William, > > I like all of your ideas, but they have one thing in common, they are all > passive. All the placards/labels/signs in the world won't prevent someone > from not reading or acting or miss understanding them. So I totally agree > with the NEC that we need automatic disconnects that prevent such events in > the future. > > I think this kind of sad event is the reason for the NEC to require > array/string level disconnect. > From what I've heard and I'm sure others are well more versed than I, but we > will see module level shutdown required in 2017 NEC, and I for one welcome > that. > > jay > > peltz power > sent: 11.35am 9/6/15 > > > > > >> On Fri, Sep 4, 2015 at 2:21 PM, William Miller >> wrote: >> Dear Friends: >> >> >> >> Last week a local well technician was electrocuted. I had just met him in >> conjunction with a job we are about to do and realized right away he was a >> very nice person. He left behind a wife and two teenagers. Most tragic, >> his wife was working with him when it happened. >> >> >> >> The scenario is still not fully understood but here is what we do know: >> >> >> >> 1.The fellow was digging with a mini-excavator. >> >> 2.He knew buried lines were present and had turned off all circuits he >> thought were included. >> >> 3.He struck a power feeder. We don’t know if it was direct bury or in a >> conduit or if it was AC or DC. >> >> 4.Based on his impression the conductors were all dead, he jumped into >> the ditch with uninsulated dikes to cut the wire. >> >> 5.He had one hand on a t-post and the other on his pliers. >> >> 6.His wife grabbed his clothing but could not get him to release his >> grip. >> >> 7.An AT&T tech was nearby and donned hot gloves to pull him off the >> circuit. It was too late. >> >> >> >> This is an important issue for all of us. We work with high voltage >> regularly. We need to think about how to avoid this. >> >> >> >> I have connected with high voltage AC many times. My body always reacts to >> retract from contact. I got across high voltage DC once. I could not let >> go. I had to will myself to throw my arms down to break contact. The >> experience was frightening. >> >> >> >> On our crew we are integrating what we hope will be reflexive responses to >> given procedures. >> >> >> >> One is this: Every time you turn off a breaker to work on a circuit, the >> next thing you touch is a meter to check that the circuit is de-energized. >> >> Two: Don’t trust your inductive tester. It will not detect DC. It will >> not always indicated voltage present. >> >> >> >> This accident was at a local winery. Many wineries in this region have >> ground-mounted PV systems, many remote from the main service, therefore they >> have underground feeders. Most are string configured systems meaning the >> feeders are high voltage. >> >> >> >> It occurs to me that the uninformed worker might assume that turning off all >> the circuit breakers at the meter will de-energize a circuit, should it be >> compromised. Turning of the AC breakers would not de-energize a DC PV >> feeder. This is a problem. >> >> >> >> I spoke with another well technician about this . He was not aware of the >> safety issues associated with PV feeders. >> >> >> >> What to do? Here are a few suggestions: >> >> >> >> 1.Mark all conduits with bury tape 12” above the conduit. This does >> require extra work, you have to make two runs backfilling. >> >> 2.Sign the meter panel with an indication that opening all the circuit >> breakers will not de-energize all circuits on the property >> >> 3.Include your contact number so you can easily be contacted to >> reinforce the steps needed to be taken to excavate safely. >> >> 4.Always include disconnecting means at a ground-mount array. >> >> >> >> This issue is specific to excavation operations, but this reminds me of why >> I am so picky about wire shielding on ground mount arrays. This tragedy >> could easily happen to a child climbing on a ground-mount rack. >> >> >> >> Please add your thoughts on how to best manage the safety issues presented. >> >> >> >> William >> >> >> >> >> Lic 773985 >> millersolar.com >> 805-438-5600 >> >> >> >> >> ___ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http:
Re: [RE-wrenches] clear sealant recommendations
I like 'Through The Roof'. Eric Stikes Owner, SunHarvest Solar CA. Solar Contractor #968280 Founding Director, GoodSun Solar CA. Non-profit Corp. 001.530.798.3738 (cell) www.harvesthesun.com [message sent from cell phone] > On Aug 10, 2015, at 2:52 PM, August Goers wrote: > > Hi Wrenches, > > For the most part we are using Chemlink M1 sealant for to seal our rooftop > penetrations. It hasn’t let us down yet. > > M1 is a available in several opaque colors and grey is the most common. > Sometimes we want a good quality clear sealant to put around conduit > fittings, where our conduit enters buildings, etc. We used Geocell 2300 in > the past and I don’t have anything bad to say to it but our current supplier > doesn’t carry Geocell products. More recently we’ve tried Chemlink Clear > sealant but I’ve already seen signs that it doesn’t hold up well in the > elements – it seems to peel off the surface it was installed on and turn > brown relatively fast. > > Does anyone have a good multipurpose clear sealant that they like? > > Best, > > August > > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Flashed Roof-attachment systems
Hi William, I've used QuickMount almost exclusively for the past 5 or so years. Good product. Lots of options including height extension blocks. They also have conduit flashings for running emt on a roof. Good documentation for permitting as well. I believe they have a 20yr warranty too. Eric Stikes GoodSun Solar A CA. Non-profit Corp. 001.530.798.3738 (cell) www.goodsun.life [message sent from cell phone] > On Aug 5, 2015, at 3:30 PM, "William Miller" > wrote: > > Friends: > > We have been using the Eco-Fasten flashings for comp roofs. We have a few > complaints: > > 1.We have been using the Eco-Fasten blocks and Unirac serrated L-feet. > There is not enough room below the foot to install the neoprene washer, the > block, the bonded washer, the washer, the lock washer and the nut. The > L-foot runs into the nut. > 2.The flashing is not wide enough (12” high by 8” wide). If the flashing > ends up on the split between two 3-tab shingles there is an obvious leak path. > 3.The company does not offer a decent cut-sheet. This is crucial to the > permit authoring process. > 4.We can’t seem to get the rail height correct. We would prefer about 4” > to the top of the rail. > a.The L102-3 results in a rail height of 3”. > b.The L102-6 is 6” rail height—this is too high. > c.The block with the Unirac serrated L-foot results in 3-3/4”, but the > combination of parts does not really fit and it is expensive. > > We have also tried the Iron Ridge and it seems to offer some improvements: > 1.The flashing is larger (12” by 12”). > 2.The rail height is about 3-1/4”, still a little low. > > I posted some photos and comments on our web site: > http://www.millersolar.com/MillerSolar/case_studies/Flashed_roof_attachments/FlashedRoofAttachements.html > > Do any of you have any suggestions for a flashed foot system with a rail > height of about 4” and a wider flashing? Do any of you have any comments on > products you like or don’t like for our review? > > Thanks in advance. > > William Miller > > > Lic 773985 > millersolar.com > 805-438-5600 > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Dream system.
How 'bout a Tesla Powerwall? That way you can test it out first and let us know how it goes :) Got any flexible, multi-application thin film out there? How about PV-direct water pumping? That's going to be a hot topic for us in Cali. here pretty shortly. Sounds like a great gig you have there. Thanks for being a solar educator and spreading the good word. Eric Stikes GoodSun Solar, A 501(c)(3) CA. Non-profit Corp. 001.530.798.3738 (cell) www.goodsun.life > On Jul 31, 2015, at 5:54 PM, Solar wrote: > > All great ideas!! > > We do have S-5 both for racking and the PV kit. To Great point we do cover > efficiency, passive solar, load shifting... We do have internships with > install companies and the utilities. We have 5 different racking types and > one ballast mount for hands on work. We have 4 on campus systems all with > different monitoring (Tigo, enphase, egauge and SMA) while working on the > mock roof we do tie off and observe a safety procedure. We also cover OSHA > regs as part of class and the students get OSHA 10. > > The battery ideas are good too. LION and such are needed for sure along with > monitoring for those systems. I just did my first solaredge system and I > agree that is a must. > > We also need some design software. We have the pathfinder and solmetric > software we use in class and we use PVwatts and those similar to that. > > Much appreciated. I hope to build lab that covers as much as possible for use > with students and our continuing ed electrical programs. > > Jesse > > Sent from my iPhone > >> On Jul 31, 2015, at 5:57 PM, Glenn Burt wrote: >> >> I would suggest a Solar Edge inverter system, some lithium batteries, an >> Aqueon battery system, a variety of safety equipment and trying to partner >> with a local installation firm for site visits, and possibly hands on work. >> >> Sincerely, >> Glenn Burt >> Sent from my 'smart' phone so please excuse grammar and typos. >> From: Solar >> Sent: 7/31/2015 17:05 >> To: Wrenches >> Subject: [RE-wrenches] Dream system. >> >> Hello all, >> >> I was recently hired to be the full time electrical instructor at a local >> community college. In the second year of the class there is a 6 credit >> "renewable energy and habitat house" course. I have been teaching at this >> college as an adjunct instructor since 2009 teaching for 3 of the 7 local >> iron ore mines,the local paper mill as well as doing most of the NEC code >> update courses. During that time I ran a one year and a 6 month solar PV >> course. I have a fairly nice lab built for the PV course consisting of the >> following: >> >> 2 axis tracker >> Fixed tilt pole mount >> 20'x16' mock roof with shingles and metal roofing >> Enphase systems >> (3) 700W SMA inverters >> Outback setup >> Xantrax 600v 80A charge controller >> Magnum 4024 inverter (AC coupled goal with this) >> Tigos >> 300W Morningstar on a demo cart >> Couple Solectria inverter (not used much) >> Trace 4024 (purchased in 99) >> Trace DR 1524 that goes along with our 1Kw Bergy >> Multiple battery brands and types AGM and flooded >> Pathfinders >> Suneye (2 210s) >> 600V Solmetric PVA >> Racking, quickmounts standoffs, clamps nuts and bolts... >> >> >> Modules include: 90W sunwize, Solarwolrd 175, REC 215W, silicon energy 190W, >> kyocera 210W, solar frontier 100W (I think 100W) AEE 95W, Dasol 15, 30, >> 135w. >> >> Assuming I stay with this job for the next 25 years, which will take me into >> my early 60s and my goal, I will have a yearly budget to spend adding to >> this lab. >> >> Here is the question, seeing what we have now what individual pieces would >> you add or what system would you build with the goal of community education >> or training electrical students and electricians. >> >> Long winded but I am very interested to hear your ideas! >> >> Have a good weekend and thanks! >> >> Jesse >> >> >> >> Sent from my iPhone >> ___ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> ___ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org > _
[RE-wrenches] Eaton replacement guts for Sylvania panel
I have a Sylvania/Zinsco changeout to complete and I am interested in using the Eaton "panel-interior swap kit". When I went in to my local electrical supply house the service tech said, "Huh?" Then he checked and saw only 1 package has been sold in the last 3 or so years. Apparently they're not used very frequently for Syl/Zin upgrades. Does anyone have any experience with these units? (They are a guts swap package where you can leave the Sylvania box in the wall, pull out the busbar, and replace it with an Eaton bus and breakers). Thanks. Eric Stikes Owner, SunHarvest Solar CA. Solar Contractor #968280 Founding Director, GoodSun Solar CA. Non-profit Corp. 001.530.798.3738 (cell) www.harvesthesun.com [message sent from cell phone] ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Panels with 20.1% efficiency rating?
Speaking to the U.S. market: I've been a SPR dealer 3 different times (on again, off again, currently on). Because I have to bid against non-SPR systems all day long I've had to do my homework on this issue. From what I've read in the literature, there are no commercially available mods that are in the 20's except SPR. Other high eff claims are cell eff or non-commercial/space tech stuff. Too bad. Can't wait for solar R&D to break the ceiling and reach commercially viable efficiencies in the 50's at least. Eric Stikes Owner, SunHarvest Solar CA. Solar Contractor #968280 Founding Director, GoodSun Solar CA. Non-profit Corp. 001.530.798.3738 (cell) www.harvesthesun.com [message sent from cell phone] > On Dec 20, 2014, at 3:28 PM, "b...@midnitesolar.com" > wrote: > > > If you ~really~ need high efficiency solar panels, you could go here... > > http://www.spectrolab.com/solarpanels.htm > > Greater than ~30% efficiency if you don't mind paying about $250 per watt. > > boB > > > >> On 12/20/2014 2:34 PM, Larry wrote: >> Hey Marco, >> >> I pulled the data sheet to scan it and what did I see? CELL efficiency is >> 21.1%, not module efficiency. I guess I told all my customers >> wrongsheesh! >> >> I will email you the data sheet. >> >> Larry >> >> On 12/20/14 10:41 AM, Marco Mangelsdorf wrote: >>> Can you please provide a spec sheet on this mod, Larry? >>> >>> Thanks, >>> marco >>> >>> From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On >>> Behalf Of Larry >>> Sent: Saturday, December 20, 2014 7:39 AM >>> To: RE-wrenches >>> Subject: Re: [RE-wrenches] Panels with 20.1% efficiency rating? >>> >>> Right August, it was the Panasonic HIT 240 that is 21.1% . The newer ones >>> are less. >>> >>> >>> On 12/20/14 9:53 AM, August Goers wrote: >>> Hi Lou, >>> >>> The LG Mono X NeON 305 W 60 cell is 18.6% according to their website. I >>> think that is about the best non-SunPower option you can readily get these >>> days. >>> >>> http://www.lg.com/us/commercial/solar-panels/lg-LG305N1C-B3 >>> >>> >>> Even Panasonic modules are only 19.4%: >>> http://eu-solar.panasonic.net/en/products/n-240-n-245/ >>> >>> Best, August >>> >>> >>> >>> From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On >>> Behalf Of Lou Russo >>> Sent: Saturday, December 20, 2014 8:16 AM >>> To: RE-wrenches >>> Subject: [RE-wrenches] Panels with 20.1% efficiency rating? >>> >>> Wrenches, >>> >>> I am looking for panels with a 20.1% efficiency rating or better, that are >>> NOT Sun Power. My distributors can not acquire anything even near that. Any >>> leads or resources to check would be greatly appreciated. >>> >>> Thanks! >>> >>> Aloha, >>> >>> Lou Russo >>> (440) 345 6762 > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
[RE-wrenches] ITC for solar water pumping on a ranch
Does anyone know for certain if a homeowner can qualify for the 30% federal solar tax credit (ITC) if the PV is used for direct water pumping out of a well used for irrigation? To be more specific, there are two wells that will be solarized. One well will provide irrigation water to livestock on the homeowner's property. The other well will provide drinking water to a future residence (not yet built) on the property. From what I'm reading online, the answer is yes but the actual IRS tax form doesn't address this application and I've been told by a friend that the answer is no. Thanks! Eric A. Stikes **** Owner, SunHarvest Solar CA Solar Contractor 968280 * Founder, GoodSun Solar CA Non-Profit C3586424 On Oct 24, 2014, at 9:58 AM, "Starlight Solar Power Systems," wrote: > Jay, > > Perhaps asking the question here. I have hundreds of Magnum inverter > installations, perhaps I or others can help. > > Larry > On Oct 23, 2014, at 5:44 PM, jay peltz wrote: > > HI All, > > Does anyone have a person at Magnum in engineering or higher up than tech > support. > > I've got a problem with an inverter that tech support won't or can't help > with. > > thanks > > jay > > peltz power > ___ > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] A legal PV install in CA
That's what I thought. Thanks for pointing me to the documentation Marco! SunHarvest On Aug 21, 2014, at 11:20 PM, Marco Mangelsdorf wrote: > This should be helpful, Eric. > > https://www.dir.ca.gov/dlse/ecu/ElectricalTrade.html > > From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On > Behalf Of e...@harvesthesun.com > Sent: Thursday, August 21, 2014 8:01 PM > To: RE-wrenches > Subject: [RE-wrenches] A legal PV install in CA > > California Wrenchers, > > I have a C-46. A company with which I subcontract has a C-10 but uses > non-licensed, non-journeyman, non-apprenticed laborers to complete all phases > of their PV installations, including the final tie-in and commissioning. > These guys are working under no supervision. I have the understanding that > this is not legal. Am I incorrect? Where is the affirmation/negation > documented? Thanks. > > > SunHarvest > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Moving batteries
William,
I just had three customers replace their failing battery banks at the same
time. Eight batteries in total, each weighing over 1000#. I couldn't come up
with the heavy equipment for loading & transport myself so I coordinated the
move with a local tree faller friend (plenty of lumber jacks up here in the
sticks) who has a small Bobcat skid and a heavy-duty flat bed truck. It worked
out pretty well. The issue of HAZMAT control & signage shouldn't be ignored and
was addressed.
Eric
SunHarvest
001.530.798.3738 (Cell)
- Original Message -
From: Tump
To: RE-wrenches
Sent: Wednesday, March 19, 2014 6:05 PM
Subject: Re: [RE-wrenches] Moving batteries
Ahh the joys of steel contained batteries. Are the interconnects welded? If
you "own" them then you can move them. If I am going on the road w/ any
battery, proper placarding is the norm but I ALWAYS cover them. Sometimes I use
a tarp other times I use a "used" lumber (say for a stack of 2"x10"x 20's)
tarp. these tarps come on a load/pallet of lumber. The lumber company usually
throws them away.
U haul trailer, flat bed or sometimes you can get your friendly scrap/junk
dealer to transport them on their tilting car transport for the old batteries.
$.025-.35/Lb can usually add up quickly.
On Mar 19, 2014, at 8:20 PM, William Miller wrote:
Friends:
I'm installing 12 deka FLA batteries. They're 1860 pounds each and none of
the local movers want to touch them since they're considered hazmat.
Have any of you ever addressed this problem?
As always, thanks in advance.
William Miller
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Re: [RE-wrenches] Ungrounded P.V.
Jason, See page 29 of the SB7000TL manual for grounding requirements and page 30 for a schematic. Both the pos and neg are disconnected in the DC disco that comes with the SB7kTL. One problem that we recently ran into is that the TL makes WAY more noise upon start-up and shut-down than the non-TL so do not mount the inverter next to any noise-sensitive area such as a bedroom. The installation manual mentions this very slightly (insufficiently). Seriously, WAY more noise. Eric Stikes SunHarvest 001.530.798.3738 (Cell) - Original Message - From: Jason Andrade To: re-wrenches@lists.re-wrenches.org Sent: Friday, February 14, 2014 9:08 AM Subject: [RE-wrenches] Ungrounded P.V. Wrenches, I have yet to do a Transformer-less inverter and am understanding that they are an ungrounded system and that both the positive and negative of each string will need to be disconnected. I started with the sma SB series and now find myself using mainly Enphase. The SMA TL dual mppt lighter weight inverter has my attention, especially with AB327 Knocking on the door but that's another topic. Jason West Coast Sustainables Jason Andrade C-46# 974647 (530) 410-4745 Cell (530) 241-7498 Office (530) 348-5301 Fax ja...@westcoastsustainables.com -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] CA Fire code
We met with the Nevada County AHJ and the local CalFire Chief yesterday to discuss details about the new Title 24 regs. So far, their official policy on PV mod fire rating is this: "Modules shall be tested, listed, and identified with the fire classification based on the specific type of building construction. (See CBC Table 1505.1 for specific classification requirements)." Basically, we can install Class C rated modules on buildings of Type 2B, 3B, and 5B construction. Anything else requires a Class A or B module. That's the latest word from Nevada County. Special thanks to Lars et al. at Cal Solar for keeping the rest of us up here in the Gold Country in socks and groceries. Flowers are on their way. Eric Stikes SunHarvest 001.530.798.3738 (Cell) - Original Message - From: Bill Brooks To: findso...@herzfeld.org ; 'RE-wrenches' Sent: Thursday, January 09, 2014 5:17 PM Subject: Re: [RE-wrenches] CA Fire code Martin, Regarding your reference to installations west of I-280 requiring Class A, I did not find that in Palo Alto's materials. The City of Woodside fire department was very involved in the CalFire Guidelines and I would not be surprised if they implemented such a requirement. If you can find a specific document with the wording, I would love to see it. I will likely be working with SEIA to draft some educational materials on the new standards and how to apply them. Bill. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Martin Herzfeld Sent: Thursday, January 09, 2014 4:13 PM To: RE-wrenches Subject: Re: [RE-wrenches] CA Fire code 1. In addition to the thoughts shared, for instance, for one AHJ: (A) I think "Photovoltaic Installations west of Interstate 280 require PV modules to have a minimum Class A fire rating" - requirements and 'additional information' since 2009 were revised and updated here ? http://www.cityofpaloalto.org/gov/depts/utl/residents/resources/pcm/pv_permitting_and_interconnection.asp (B) Also ground-mount options - not only just rooftops - CSFM Guidelines Section 5.0, ... http://www.cityofpaloalto.org/civicax/filebank/documents/34052 http://osfm.fire.ca.gov/informationbulletin/pdf/2012/IB_12-004_FireApparatusAccessRoadsPhotovoltaicFacilities.pdf http://osfm.fire.ca.gov/training/pdf/Photovoltaics/Fire%20Ops%20PV%20lo%20resl.pdf You may first check with the specific jurisdiction for more information ... 2. In addition, you may want to join or attend the IAEI meetings in California, there's good information on this and other topics at the monthly meetings and CEUs. http://www.iaei.org 3. By the way, I attended at the very last stakeholder meeting in SF and the publications here for new changes and updates http://www.solarabcs.org/about/publications/reports/flammability-testing/index.html 4. Wildland Hazard/Building Codes http://www.fire.ca.gov/fire_prevention/fire_prevention_wildland_zones.php We'll check it out on an install, if in the area ... Martin Herzfeld California Contractor License #833782 UL Certified PV Installer #17, OSHA 30 Certified Technical Classroom Trainer (CTT+) OSHA-Authorized Construction Trainer Wrenches, If you are in a wild land fire zone in CA, it looks like we are all in for a rude awakening. Our local AHJ is requiring not only set backs for ventilation of roofs, but also THAT ALL PANELS ON THE ROOF CARY A CLASS A FIRE RATING! It doesn't take allot of research to realize that this pretty much eliminates roof-top solar as an option, as if you can eve find a class A panel, they are cost prohibitive. I'm wondering a couple things. One, has anyone had luck using the local political process to postpone the enforcement of the class A requirement? and two, has anyone found readily available Class A modules? This issue seems to have caught the industry with it's pants down, as industry lobby doesn't even seem to be aware that the the local AHJ's would have this interpretation. Is this the end of roof top solar in 60% of California? What are y'all doing to deal with this issue? -- Lars Ortegren President California Solar Electric Company .PO Box 480 149 E.Main St Grass Valley, CA 95945 Phone : (530)274-3671 Fax: (530)274-7518 California C-10 Electical Contractor #779624 Certified NABCEP Continuing Education Provider Certified NAPCEP Technical Sales and Installation Profesional ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrench
[RE-wrenches] Fw: January 1 - CA Title 24 Section 2.5 regulation
Hello CA solar pros - I've just today heard rumor that come January 1, certain AHJs will be enforcing a new Title 24 reg requiring PV modules to meet Class A fire rating; which most currently do not. I'm not too concerned, yet. But a few of my local colleagues and competitors are talking about the end of PV, for some unknown duration, in California due to this new regulation taking effect in the new year. Just wondering if anyone else has heard the news and if I should quit my day job...(finally!)...or if someone's trying to celebrate April fools early... Eric Stikes SunHarvest 001.530.798.3738 (Cell) ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Busbar rating with multiple main breakers
Sounds like I may be misinterpreting something but I don't think so... NFPA 70, 2014 NEC 705.12(D2)(3)(b) states, "The sum of 125% of the inverter(s) output circuit current and the rating of the overcurrent device protecting the busbar shall not exceed 120% of the ampacity of the busbar." Based on this wording, here's an example of the way I calculate whether or not I'm compliant with the 120% rule: 1. Circuit#1 inverter output current rating = 13.5A X 1.25 = 16.88 (OCPD for this circuit = 20A)...(I run 10AWG for these circuits) 2. Circuit#2 inverter output current rating = 9.0A X 1.25 = 11.25 (OCPD for this circuit = 20A) 3. 16.88A + 11.25A = 28.13A 4. 28.13A + 100A (rating of main OCPD in subpanel) = 128.13A 5. Ampacity of busbar in 125A rated subpanel = 125A 6. 125A X 1.2 = 150A 7. 128.13A < 150A, therefore, this installation is compliant with 2014 NEC 705.12(D1-D6). If I used the 100A rating of the OCPD instead of the 125A rating of the busbar, I would be limited to 20A of PV instead of 50A. According to the wording in the NEC I ignore load breakers and only concern myself with OCPD for PV inverter output circuits and OCPD for the busbar. Eric Stikes SunHarvest___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Busbar rating with multiple main breakers
Hi guys - Concerning the 120% rule: I've encountered several circumstances recently where a 400A nameplate-rated (listed on inside label) main panel has two 200A main breakers. One of the breakers will be feeding the busbar in the main and the other will feed a subpanel. I had previously thought the main busbar is rated at the nameplate rating (400A in this case) regardless of quantity of main breakers. My lead electrician says the main busbar in these types of panels is derated to 200A because of the split. However, I have two other reliable electrician friends who disagree with my lead electrician. One of my C10 buddies says it depends on whether or not the busbar in the main is broken up into 2 sections (200A) or it is continuous (400A). Can anyone clear up, beyond doubt, our disagreement? Thanks! Eric Stikes SunHarvest___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] BP solar warranty contact etc.
I guess I never followed up. The warranty claim process was a success; just had to take lots of unnecessary pictures. BP paid out a check to replace all the modules even though only half of them failed. Guess they have a crystal ball. Warning: They will not reimburse for labor. Contact Lini: Lini After Sales Warranty Customer Service Representative Location: Cantera II, 218N Tel: 630-821-2287 Zhang, Lini Good luck! Eric Stikes Owner SunHarvest 001.530.798.3738 (Cell) - Original Message - From: Allan Sindelar To: RE-wrenches Sent: Wednesday, November 06, 2013 2:59 PM Subject: Re: [RE-wrenches] BP solar warranty contact etc. Here are a couple of previous Wrenches posts: 7/30/13: I looked up BP Solar and found their Alternatives page: http://www.bp.com/sectiongenericarticle.do?categoryId=9025019&contentId=7046515 Which has this info for warranty claims: For customers from Americas (North, Central, South) Telephone Number: 1-866-BP-SOLAR and 1-800-891-2163 Email Address: bpsolarwarranties...@bp.com The 866-BP-Solar number is bunk but the 891-2163 number got me to Nancy and she, being very friendly, put in a warranty claim for me on behalf of my customer. We'll see where it goes from here... SunHarvest 6/10/13: Hi Mac, Everything is different again. I just did a claim, and things seemed to work for the client quite well (full replacement). BP is having the owner call 800 891-2163 to start a claim. In Colorado the claim went to a 3rd party installer that is handling all the claims. They came out, did their own evaluation and recommendation to BP. BP than processed the recommendation, and passed along their judgement.In our case the client could have modules that BP procured (I think Motech) installed by the 3rd party installer, or a cash buyout. The new process doesn't seem to bode well for the local installer as far as drumming up work as you are soon cut out of the loop. I find though that these clients are incredible grateful for looking out for their best interests. Ultimately, things worked out much easier, as our 3rd part BP reps are great. If this is the process, for better or worse, it is much easier. Jay Pozner 10/2/12" >From 10 months ago. Not sure whether Christine is still there. Christine Alinen Asset Coordinator After Sales/Warranty BP Solar 301-698-4217 Anyone know who is providing warranty support for BP? Same old problem - shattered glass from overheated J box area Jeremy Rodriguez Sent via BlackBerry. Sorry for typos and shorthand!Allan Allan Sindelar al...@positiveenergysolar.com NABCEP Certified PV Installation Professional NABCEP Certified Technical Sales Professional New Mexico EE98J Journeyman Electrician Founder, Positive Energy, Inc. A Certified B CorporationTM 3209 Richards Lane Santa Fe, New Mexico 87507 505 424-1112 office 780-2738 cell www.positiveenergysolar.com On 11/6/2013 3:52 PM, Chris Daum wrote: Kirk: My last warranty contact was Tracy Cox at 301-698-4307, cox...@bp.com, but I'm not sure how current that information is. I've had regular BP/Solarex warranty problems over the years (since 1990 or so), and it's seemed like they were generally slow to respond before they stepped up to the plate. Thus, they've never been a desirable module to sell, IMO. GOOD LUCK. Chris Daum Oasis Montana Inc. 406-777-4309 406-777-0830 fax www.oasismontana.com From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirk Herander Sent: Wednesday, November 06, 2013 3:33 PM To: RE-wrenches Subject: [RE-wrenches] BP solar warranty contact etc. Hey folks, I'm in the middle of re-commissioning properly(megger, curve tracer, etc.) a 45 kw system that I installed using BP SX170B panels in the Spring of 2006. I have found 5 strings so far with 0 Voc, and 2 strings with a good Voc but 0 current when the inverter is operating. I have noticed small brown burn marks on the face of a few panels where the junction box and/or bypass diodes are (haven't looked at every panel yet). I understand that these panels are now showing problems elsewhere in the field. If one of you familiar could pass me the present BP warranty contact, that would be great. Also any real-life experience / two-cents worth with your dealings with BP and this problem would help also. Thanks. Kirk Herander VT Solar, LLC dba Vermont Solar Engineering NABCEPTM Certified Inaugural Certificant NYSERDA-eligible Installer VT RE Incentive Program Partner 802.863.1202 ___ List sponsored by Home Power magazine Lis
[RE-wrenches] Trace 2548 intermittent power problem...55 not 25
I was looking at a scratch pad note where I wrote 25 instead of 55...Yes, it is a SW5548. Definitely not set to "Search"...it's in "On" mode. I've checked error codes. No "Yes" messages. I am wondering about a firmware upgrade although I have serious doubt that will clear up the problem. I guess I will try the swap and see if that does the trick. On the genny, I try to stay away from genset service but I can definitely check some of the more simple items like check oil & coolant. Thanks guys. - Original Message - From: Allan Sindelar To: RE-wrenches Sent: Thursday, October 17, 2013 10:36 AM Subject: Re: [RE-wrenches] Trace 2548 intermittent power problem Eric, A Trace 2548 with automatic generator start? I don't believe there ever was such a thing. I suspect that you're referring to either a SW4048 or SW5548. If so, your first step is to check the error codes, some of which are found in Menu Heading 2 (for generator-related issues) and the rest in Heading 5. Any "Yes" message as you scroll through them is a good hint. This inverter is at least 13 years in service, likely more. Sounds like a pre-GTI Y2K system. The units are remarkably robust and reliable, but it may well have a glitch in the firmware or voltage/frequency sensors. The extra inverter is your ace in the hole, once you determine what the issue is. Allan Allan Sindelar al...@positiveenergysolar.com NABCEP Certified PV Installation Professional NABCEP Certified Technical Sales Professional New Mexico EE98J Journeyman Electrician Founder, Positive Energy, Inc. A Certified B CorporationTM 3209 Richards Lane Santa Fe, New Mexico 87507 505 424-1112 office 780-2738 cell www.positiveenergysolar.com On 10/17/2013 10:41 AM, SunHarvest wrote: I have encountered a Trace 2548 in seemingly good working condition. I was called out to troubleshoot a Grid-tied, battery back-up system with the following problem: - Upon loss of grid power there is about a 5 second lapse (no power to house) before the BB system engages. Power to the critical loads panel from the Trace is restored after the 5 second lapse. - After another 5 seconds the Trace will disconnect power to the loads. This on-off cycle continues until grid power is restored. After checking voltage & S.G. values, I determined that the 11 year old batteries needed to be replaced and I assumed this was the cause of the Trace on-off cycling. I also found that half of his PV array had bad BP modules. BP replaced all of the modules under somewhat of a warranty. So, new modules, new batteries, and a new Outback FM60 charge controller. After all upgrades I ran through a simulated power outage again and the intermittent power problem persists! He also has gen support enabled - connection to an Onan "RV Genset BGE NHE (??) - and when I start the genny from the inverter, by selecting "On" not "Auto", the genset fires right up but only stays on for about 30 seconds before it too shuts off and enters a cycling between auto-starting from the inverter and shutting down. This behavior is beyond me. So, I'm seeking help from the pros. Anyone know what's going on here? The customer has another Trace 2548, unused, sitting in a box. So, if I needed to I could swap out the inverter and see if that makes a difference...? Eric SunHarvest (530)798-3738 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Trace 2548 intermittent power problem
I have encountered a Trace 2548 in seemingly good working condition. I was called out to troubleshoot a Grid-tied, battery back-up system with the following problem: - Upon loss of grid power there is about a 5 second lapse (no power to house) before the BB system engages. Power to the critical loads panel from the Trace is restored after the 5 second lapse. - After another 5 seconds the Trace will disconnect power to the loads. This on-off cycle continues until grid power is restored. After checking voltage & S.G. values, I determined that the 11 year old batteries needed to be replaced and I assumed this was the cause of the Trace on-off cycling. I also found that half of his PV array had bad BP modules. BP replaced all of the modules under somewhat of a warranty. So, new modules, new batteries, and a new Outback FM60 charge controller. After all upgrades I ran through a simulated power outage again and the intermittent power problem persists! He also has gen support enabled - connection to an Onan "RV Genset BGE NHE (??) - and when I start the genny from the inverter, by selecting "On" not "Auto", the genset fires right up but only stays on for about 30 seconds before it too shuts off and enters a cycling between auto-starting from the inverter and shutting down. This behavior is beyond me. So, I'm seeking help from the pros. Anyone know what's going on here? The customer has another Trace 2548, unused, sitting in a box. So, if I needed to I could swap out the inverter and see if that makes a difference...? Eric SunHarvest (530)798-3738___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Enphase and Line Noise
Thanks William, I completely agree about PV dedicated power centers & connections. I talked with the homeowner about having the Envoy located in the detached garage several hundred feet away from the house where the solar is mounted and tied into a dedicated sub but he insisted the Envoy be located in the house. I'll give the Digi-Key filter a try. Thank you! SunHarvest - Original Message - From: William Miller To: 'RE-wrenches' Sent: Wednesday, October 16, 2013 5:52 PM Subject: Re: [RE-wrenches] Enphase and Line Noise Hey Eric, Wrenches: The first thing that jumps out at me is the timer in the neutral. That is messed up. You should never switch the neutral. I have had some difficult Enphase interference problems. I was told this and did not believe at first, but always, always, bring your Enphase feeds into a separate sub-panel. In that sub-panel install the breaker feeding the receptacle for the Envoy. This way you can filter the feeder to that sub-panel and it is isolated from the entirety of the remaining electrical system. I tried the toroidal filters but they did not work Nick Soleil recommended an in-line filter from Digi-key that did the trick. Here is the link: http://www.digikey.com/product-search/en?vendor=0&keywords=FN+2450G-20-61 Good luck. William From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of SunHarvest Sent: Wednesday, October 16, 2013 3:34 PM To: RE-wrenches Subject: Re: [RE-wrenches] Enphase and Line Noise I really like using Enphase but my most recent customer just informed me that his pool lighting is now turning on and off intermittently after the PV install completion. The lights are controlled via a timer on the neutral line. I'm pretty green when it comes to controls so I don't have a solution yet. Just thought I'd add my experience in response to your query. Look forward to what others have to say about this... Eric - Original Message - From: ma...@berkeleysolar.com To: re-wrenches@lists.re-wrenches.org Sent: Wednesday, October 16, 2013 1:01 PM Subject: [RE-wrenches] Enphase and Line Noise Guys, I am thinking of getting back into using Enphase, but I am worried about sites with high line noise block communication with the microinverters. I have run into homes with light control systems and VFD pumps. I am wonder what folks have experienced: 1 - How often do you encounter this problem? 2 - What are other causes of noise that impacted the site? 3 - How did you address, with a line filter? 4 - How did you handle the added cost, passed it on or eat it? Thanks, Mark Frye Berkeley Solar Electric Systems ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org -- No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4158 / Virus Database: 3609/6740 - Release Date: 10/10/13 -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Enphase and Line Noise
I really like using Enphase but my most recent customer just informed me that his pool lighting is now turning on and off intermittently after the PV install completion. The lights are controlled via a timer on the neutral line. I'm pretty green when it comes to controls so I don't have a solution yet. Just thought I'd add my experience in response to your query. Look forward to what others have to say about this... Eric - Original Message - From: ma...@berkeleysolar.com To: re-wrenches@lists.re-wrenches.org Sent: Wednesday, October 16, 2013 1:01 PM Subject: [RE-wrenches] Enphase and Line Noise Guys, I am thinking of getting back into using Enphase, but I am worried about sites with high line noise block communication with the microinverters. I have run into homes with light control systems and VFD pumps. I am wonder what folks have experienced: 1 - How often do you encounter this problem? 2 - What are other causes of noise that impacted the site? 3 - How did you address, with a line filter? 4 - How did you handle the added cost, passed it on or eat it? Thanks, Mark Frye Berkeley Solar Electric Systems ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Enphase commercial
That works. Thanks Nathan! Eric - Original Message - From: Nathan Stumpff To: RE-wrenches Sent: Thursday, October 03, 2013 12:28 PM Subject: Re: [RE-wrenches] Enphase commercial Hi Eric, It is 25 inverters on a 20A circuit, but only on 208 three phase. Each micro connects to the cable in an alternating way (L1/L2, then L2/L3, then L3/L1, etc.) so with 25 micros there are either 8 or 9 micros on each combination. 9 x 1.0 A x 1.732 (square root of 3) x 1.25 = 19.48 A = 20 A breaker Cheers, -Nathan -- Nathan J. Stumpff NABCEP Certified PV Installation Professional #091209-175 NABCEP Certified Solar Heating Installer #032412-14 Project Manager | Arctic Sun, LLC nat...@arcticsun-llc.com | (907) 457-1297 www.reina-llc.com | www.arcticsun-llc.com From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of SunHarvest Sent: Thursday, October 03, 2013 10:52 AM To: RE-wrenches Subject: [RE-wrenches] Enphase commercial Hey Wrenches & Nick Soleil (with whom I worked at APS for a time I believe...), I'm not familiar with Enphase commercial applications and am currently working through a commercial design. Enphase, on their M215 datasheets claim up to 25 micros per branch, at 1.0A each, with each branch terminating at a 20A breaker. By my calculations, 25 micros at 1.0A each (25A*1.25=31.25A) need to terminate at a 40A breaker. Anyone know what I'm missing or know how the 20A breaker design gets past the AHJ? Eric Stikes SunHarvest (530) 798-3738 -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org <>___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Enphase commercial
Hey Wrenches & Nick Soleil (with whom I worked at APS for a time I believe...), I'm not familiar with Enphase commercial applications and am currently working through a commercial design. Enphase, on their M215 datasheets claim up to 25 micros per branch, at 1.0A each, with each branch terminating at a 20A breaker. By my calculations, 25 micros at 1.0A each (25A*1.25=31.25A) need to terminate at a 40A breaker. Anyone know what I'm missing or know how the 20A breaker design gets past the AHJ? Eric Stikes SunHarvest (530) 798-3738___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Who has the best overall solar racking solution?
September 2013 | Creotecc Solar Mounting Systems I use Ironridge all the time and like the sturdiness but I've always liked the idea of Creotecc and and really want to try it. Anyone have any first-hand experience? The images included in the forwarded email are interesting, especially when looking at the "biting" effect of Ironridge's IGS. Eric SunHarvest - Original Message - From: Creotecc US To: e...@harvesthesun.com Sent: Wednesday, September 04, 2013 3:45 PM Subject: Reduce Micro-Cracks and Hot Spots September 4, 2013 Clampless Module Mounting Can Reduce Hot Spots Compelling new images show that Creotecc's "lay-in" rail system can reduce hot spots. These thermal photos from two similar ground-mount arrays reveal vastly different systems. The Creotecc system is devoid of hot spots because mechanical stress from thermal expansion is alleviated by clampless module mounting. In addition, mounting modules from underneath the array eliminates the risk of point loads from bodyweight. Read the entire article "Reducing Hot Spots" in this month's edition of North American Clean Energy. Read Article Spotlight on Agriculture Farmers are experts at striking that balance between quality and affordability. Many businesses would do well to model what successful farmers have been practicing for decades: selecting the most robust, durable materials while keeping a tight fist on the budget. At Creotecc, we have been delivering strong, affordable ground mount systems to agriculture for years. Give us a call today for support on your next farm project. Contact Creotecc Request A Quote Creotecc quote packages include highly competitive pricing, comprehensive BOM, and preliminary engineering and design. Projects over 500kW receive free custom construction plan sets with P.E. stamps, geotechnical facilitation, in-house engineering support, on-site training, and more. To get started, click on the link below and receive a quote within 48 hours. Request A Quote 11 Janis Way | Scotts Valley, CA | 95066 | Tel: 831.438.9000 | Email: i...@creotecc.us Forward email This email was sent to e...@harvesthesun.com by i...@creotecc.us | Update Profile/Email Address | Instant removal with SafeUnsubscribeT | Privacy Policy. Creotecc | 11 Janis Way | Scotts Valley | CA | 95066 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] PV Assist
As you're aware William, being my mentor, I can't give you advice on your designs...none-the-less I figured I'd throw my hat in the ring of our talkabout (verbal walkabout)... I've seen plenty of wealthy homeowners turn to solar initially for the savings and end up acquiring an affinity for saving energy which, as I've seen, can lead to an awareness on the importance of ecological preservation. Some have even put aside their more "conservative" sociopolitical ideologies and recalled their inherent desire to connect with their environment, a.k.a. become more hippied-out man. We run up against this concept with every single solar panel we sell. Where is it manufactured? Not at the local, organic, free-range, fair-trade solar farm that's for sure. How much embodied energy and chemical by-product comes with each module (let's not talk about batteries)? Way, way, way too much. But for now, as this is the time of transition, solar is "the lesser of two evils". The underlying truth is that in order to establish a sustainable existence, at a bare minimum, we must not consume more resources than we produce. This is hardly possible given any modern lifestyle, even the most eco-friendly. Each and every one of us that are not living entirely off the land and putting back all the nutrients that we consume; despite our best intentions, recycling our plastic bottles, shopping at farmer's markets, driving electric cars, are slowly destroying our planet. So what do we do? We may not be able to save the earth but we can wake as many sleeping zombie-consumers as possible and see where that gets us. The way I see it, our good work is far from perfect but it's a modest means to a greater end and everyone must get on board, fast; even the gluttons; especially the gluttons. As it's been said, we're the pioneers. We're the messengers, the alarm clocks, and the catalysts of this paradigm shift. Energy technology is changing fast, in both the renewable and conventional sectors and we're the ones, selling solar to everything that breathes and has a pocketbook, that are helping renewables to beat coal, oil, natty gas, nuclear; and If we don't do it, who will? In order for the green revolution to contend and win we need to build bridges between the tree-huggers and the oil-mongers and that is accomplished not by creating an eco-elite but through persistent diplomacy... ...Hey, come back here with my soapbox!... - Original Message - From: William Miller To: 'RE-wrenches' Sent: Friday, August 16, 2013 5:56 PM Subject: Re: [RE-wrenches] PV Assist Friends: I am a bit surprised at the responses I have gotten on this thread. I appreciate the technical advice and I don't mind the polite philosophical discussion like the one below. However, I received one reply, fortunately off-line, that was not very polite, to say the least. I have been advised to abandon the clients that don't fit someone's criteria of green living. I don't think this is appropriate advice, especially if the adviser does not know what the whole story is. For example, one of the aforementioned clients was sold a bill of goods by a now defunct local installer. He retired, bought the property, moved in with a generator and then waited way too long for the scam artist to build a system that would "power everything with the rays of the sun." Tens of thousands of dollars later the client fired the scammer and asked me to help as best I could. He is on a fixed income, he lives with extended family, the daughter has severe health problems, the son in law is out of work, etc.. My client is in a tight situation, with no good choices. Yes, I could tell the guy f*** you, you don't meet my standards. But I am not that kind of person. I am trying to help the customer get by as best he can by working as a team. This, my friends, is the professional and humane thing to do, and I make no apologies. Have a nice weekend everyone. William Miller PS: the "good" customers are not necessarily the greenest people, they are the ones that reduce consumption as best they can, do their homework, trust me and pay on time. Wm -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of penobscotso...@midmaine.com Sent: Friday, August 16, 2013 3:22 PM To: RE-wrenches Subject: Re: [RE-wrenches] PV Assist Honestly, William, in these type of cases I usually walk away from the job if the customer isn't willing to reduce where possible. There is no such thing as a completely fool proof off grid PV system. Like a good lawyer, the best way to have a stellar record is to know which cases to takejust one man's opinion of course, but we get approached for many systems like this, particularly in the Caribbean and I have learned that there is such a thing as a good solar customer and also a ba
Re: [RE-wrenches] SW AGS
Jay, Stop absorb was enabled but that wasn't the problem. His batteries were shot. Eric, sorry I couldn't call. My cell phone died. But we figured out the problem. Seems like his system is working fine except for his 48v bank of expensive paper weights. Because he's still getting some Ah out of his industrial bank I put him on a daily EQ regime to see if we can breathe some life back into his batteries. I figured it's worth a shot and he'll learn more about battery maintenance along the way. Thanks guys! Eric Stikes SunHarvest 001.530.798.3738 (Cell) - Original Message - From: eric.bent...@schneider-electric.com To: RE-wrenches Sent: Wednesday, August 07, 2013 3:24 PM Subject: Re: [RE-wrenches] SW AGS Hi Chris, "Stop absorb" ramps up to the BULK voltage, which replaces approx 80% of capacity. Running the gen thru the absorption stage will allow for a full charge, but is a waste of fuel (most of abs is at reduced rate), and users want to charge the rest of the way with RE. The SW uses "Absorption Time" for stop parameter, but if set to "0" would accomplish the same as stop absorb. Eric _ Eric Bentsen | Schneider Electric | Solar Business | UNITED STATES | Technical Support Representative Phone: +(650) 351-8237 ext. 001# | Email: eric.bent...@schneider-electric.com | Site: www.schneider-electric.com/solar | Address: 250 South Vasco Rd., Livermore, CA 94551 *** Please consider the environment before printing this e-mail From: "Chris Worcester" To: "'RE-wrenches'" Date: 08/07/2013 03:17 PM Subject: Re: [RE-wrenches] SW AGS Sent by: re-wrenches-boun...@lists.re-wrenches.org -- Now there is a useful setting, just being a little sarcastic, this would be hard to diagnose. Was that available on the SW’s AGS menu too? Chris Worcester Solar Wind Works NABCEP Certified PV Installer Office 530-582-4503 Cell 530-448-9692 Fax 530-582-4603 www.solarwindworks.com ch...@solarwindworks.com From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay peltz Sent: Wednesday, August 07, 2013 2:30 PM To: RE-wrenches Subject: Re: [RE-wrenches] SW AGS HI Eric, Sounds like the "stop absorb" might have been enabled. This will stop the AGS when the battery volts reach absorb setpoint. But has no impact if starting the generator manually. jay peltz power Sounds like you talked to the right guy, that's his info...except that he has, according to what he told me, an SW not an XW. I'm assuming he's maybe at 50% capacity on his original 1260Ah bank based on everything he told me this morning. He did say that his bank will last him through the night and that he has some pretty hefty air conditioning loads. He also said he had equalized in the past but not in the last 18 months. I'm just not convinced that his batteries are shot. But all this battery talk may be beside the point if he's not experiencing the same on/off cycling problem when he manually starts the genny, right? That is, assuming the disco settings remain in effect regardless of start mechanism. Thanks for indulging me tocayo. Eric SunHarvest 001.530.798.3738 (Cell) - Original Message - From: eric.bent...@schneider-electric.com To: RE-wrenches Sent: Wednesday, August 07, 2013 12:54 PM Subject: Re: [RE-wrenches] SW AGS Hi Eric, Sounded like bad batteries to me also (I think he called in this AM). He has (2) XW6048 units that are capable of 200ADC between them, and he also has 1260Ah of flooded capacity. DC Start V is set for 46.5V, so if we assume he was close to 50% discharge (depending on load), it should take almost 2 hours to reach the bulk voltage (80% replaced). His batteries were ramping up to bulk in just a couple of minutes, meaning the batteries were not absorbing the charge. I have heard varying opinions on the symptoms of sulfation, but it does sound like a battery issue (5 yrs old). He was advised to equalize to try and recover them (he has never done this), or replace them. Rgds, _ Eric Bentsen | Schneider Electric | Solar Business | UNITED STATES | Technical Support Representative Phone: +(650) 351-8237 ext. 001# | Email: eric.bent...@schneider-electric.com | Site: www.schneider-electric.com/solar | Address: 250 South Vasco Rd., Livermore, CA 94551 ***
Re: [RE-wrenches] SW AGS...or is it?
Jay, To me, that sounds like the most logical answer. By the way, it IS an XW after all...whodathot? Eric, I'll give you a call when I get there. Thanks! Eric SunHarvest 001.530.798.3738 (Cell) - Original Message - From: jay peltz To: RE-wrenches Sent: Wednesday, August 07, 2013 3:36 PM Subject: Re: [RE-wrenches] SW AGS HI Chris, Nope the SW had a pretty simple menu AGS wise. jay On Aug 7, 2013, at 3:16 PM, Chris Worcester wrote: Now there is a useful setting, just being a little sarcastic, this would be hard to diagnose. Was that available on the SW’s AGS menu too? Chris Worcester Solar Wind Works NABCEP Certified PV Installer Office 530-582-4503 Cell 530-448-9692 Fax 530-582-4603 www.solarwindworks.com ch...@solarwindworks.com From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay peltz Sent: Wednesday, August 07, 2013 2:30 PM To: RE-wrenches Subject: Re: [RE-wrenches] SW AGS HI Eric, Sounds like the "stop absorb" might have been enabled. This will stop the AGS when the battery volts reach absorb setpoint. But has no impact if starting the generator manually. jay peltz power Sounds like you talked to the right guy, that's his info...except that he has, according to what he told me, an SW not an XW. I'm assuming he's maybe at 50% capacity on his original 1260Ah bank based on everything he told me this morning. He did say that his bank will last him through the night and that he has some pretty hefty air conditioning loads. He also said he had equalized in the past but not in the last 18 months. I'm just not convinced that his batteries are shot. But all this battery talk may be beside the point if he's not experiencing the same on/off cycling problem when he manually starts the genny, right? That is, assuming the disco settings remain in effect regardless of start mechanism. Thanks for indulging me tocayo. Eric SunHarvest 001.530.798.3738 (Cell) - Original Message - From: eric.bent...@schneider-electric.com To: RE-wrenches Sent: Wednesday, August 07, 2013 12:54 PM Subject: Re: [RE-wrenches] SW AGS Hi Eric, Sounded like bad batteries to me also (I think he called in this AM). He has (2) XW6048 units that are capable of 200ADC between them, and he also has 1260Ah of flooded capacity. DC Start V is set for 46.5V, so if we assume he was close to 50% discharge (depending on load), it should take almost 2 hours to reach the bulk voltage (80% replaced). His batteries were ramping up to bulk in just a couple of minutes, meaning the batteries were not absorbing the charge. I have heard varying opinions on the symptoms of sulfation, but it does sound like a battery issue (5 yrs old). He was advised to equalize to try and recover them (he has never done this), or replace them. Rgds, _ Eric Bentsen | Schneider Electric | Solar Business | UNITED STATES | Technical Support Representative Phone: +(650) 351-8237 ext. 001# | Email: eric.bent...@schneider-electric.com | Site: www.schneider-electric.com/solar | Address: 250 South Vasco Rd., Livermore, CA 94551 *** Please consider the environment before printing this e-mail From: "SunHarvest" To: "RE-wrenches" Date: 08/07/2013 12:39 PM Subject: [RE-wrenches] SW AGS Sent by: re-wrenches-boun...@lists.re-wrenches.org -- I read through the archives on the XW AGS thread but have a query on behalf of a customer with an SW AGS issue. I'm heading out to the remote site tomorrow and would like, if possible, to show up knowing what I might be up against. The customer recently replaced his AGS for his two SW 6048s and then upgraded his firmware a week later. He reported that his problem with the AGS began after firmware upgrade. Here's the particular issue: AGS will try to start the 15.8kW Multi-Quip genny due to low battery voltage (event 306 DCV start). After about 5 minutes the AGS will stop the genny due to battery absorption level reached (event 313 ABS stop). The AGS will go through this event 306/313 cycle on and off until the homeowner shuts down the AGS. To me this sounds like bad batteries. But, the homeowner says this cycling does not occur when he manually starts the generator. This doesn't sound like a complicated problem but so far I'm unfamiliar with the SW AGS. So, I would greatly appreciate any insight you g
Re: [RE-wrenches] SW AGS
Sounds like you talked to the right guy, that's his info...except that he has,
according to what he told me, an SW not an XW. I'm assuming he's maybe at 50%
capacity on his original 1260Ah bank based on everything he told me this
morning. He did say that his bank will last him through the night and that he
has some pretty hefty air conditioning loads. He also said he had equalized in
the past but not in the last 18 months. I'm just not convinced that his
batteries are shot. But all this battery talk may be beside the point if he's
not experiencing the same on/off cycling problem when he manually starts the
genny, right? That is, assuming the disco settings remain in effect regardless
of start mechanism. Thanks for indulging me tocayo.
Eric
SunHarvest
001.530.798.3738 (Cell)
- Original Message -
From: eric.bent...@schneider-electric.com
To: RE-wrenches
Sent: Wednesday, August 07, 2013 12:54 PM
Subject: Re: [RE-wrenches] SW AGS
Hi Eric,
Sounded like bad batteries to me also (I think he called in this AM). He has
(2) XW6048 units that are
capable of 200ADC between them, and he also has 1260Ah of flooded capacity.
DC Start V is set for 46.5V, so if we assume he was close to 50%
discharge (depending on load), it should take almost 2 hours to reach the
bulk voltage (80% replaced). His batteries were ramping up to bulk
in just a couple of minutes, meaning the batteries were not absorbing the
charge. I have heard varying opinions on the symptoms of sulfation,
but it does sound like a battery issue (5 yrs old). He was advised to
equalize to try and recover them (he has never done this), or replace them.
Rgds,
_
Eric Bentsen | Schneider Electric | Solar Business | UNITED STATES
| Technical Support Representative
Phone: +(650) 351-8237 ext. 001# |
Email: eric.bent...@schneider-electric.com | Site:
www.schneider-electric.com/solar | Address: 250 South Vasco Rd., Livermore,
CA 94551
*** Please consider the environment before printing this e-mail
From: "SunHarvest"
To: "RE-wrenches"
Date: 08/07/2013 12:39 PM
Subject: [RE-wrenches] SW AGS
Sent by: re-wrenches-boun...@lists.re-wrenches.org
--
I read through the archives on the XW AGS thread but have a query on behalf
of a customer with an SW AGS issue. I'm heading out to the remote site tomorrow
and would like, if possible, to show up knowing what I might be up against.
The customer recently replaced his AGS for his two SW 6048s and then upgraded
his firmware a week later. He reported that his problem with the AGS began
after firmware upgrade. Here's the particular issue:
AGS will try to start the 15.8kW Multi-Quip genny due to low battery voltage
(event 306 DCV start). After about 5 minutes the AGS will stop the genny due to
battery absorption level reached (event 313 ABS stop). The AGS will go through
this event 306/313 cycle on and off until the homeowner shuts down the AGS. To
me this sounds like bad batteries. But, the homeowner says this cycling does
not occur when he manually starts the generator. This doesn't sound like a
complicated problem but so far I'm unfamiliar with the SW AGS. So, I would
greatly appreciate any insight you guys can offer me.
Thanks!!
Eric
SunHarvest
001.530.798.3738 (Cell)
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[RE-wrenches] SW AGS
I read through the archives on the XW AGS thread but have a query on behalf of a customer with an SW AGS issue. I'm heading out to the remote site tomorrow and would like, if possible, to show up knowing what I might be up against. The customer recently replaced his AGS for his two SW 6048s and then upgraded his firmware a week later. He reported that his problem with the AGS began after firmware upgrade. Here's the particular issue: AGS will try to start the 15.8kW Multi-Quip genny due to low battery voltage (event 306 DCV start). After about 5 minutes the AGS will stop the genny due to battery absorption level reached (event 313 ABS stop). The AGS will go through this event 306/313 cycle on and off until the homeowner shuts down the AGS. To me this sounds like bad batteries. But, the homeowner says this cycling does not occur when he manually starts the generator. This doesn't sound like a complicated problem but so far I'm unfamiliar with the SW AGS. So, I would greatly appreciate any insight you guys can offer me. Thanks!! Eric SunHarvest 001.530.798.3738 (Cell) ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Solarex replacement policy - Solution Found, I think...
I looked up BP Solar and found their Alternatives page: http://www.bp.com/sectiongenericarticle.do?categoryId=9025019&contentId=7046515 Which has this info for warranty claims: For customers from Americas (North, Central, South) Telephone Number: 1-866-BP-SOLAR and 1-800-891-2163 Email Address: bpsolarwarranties...@bp.com The 866-BP-Solar number is bunk but the 891-2163 number got me to Nancy and she, being very friendly, put in a warranty claim for me on behalf of my customer. We'll see where it goes from here... SunHarvest___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Solarex replacement policy
Hi all - I had good luck a while back asking ya'lls advice on Kyocera mod replacement and thought I'd try with Solarex. I read through the archives on the Solarex threads but haven't come across the answer to my question. Here it is: I know BP is long out of the game and so I'm not holding out hope. Still, thought I'd ask. Is there a replacement policy still in effect, in some form? If so, who can I contact? These mods are about 14 yrs old and show good voltage but low amperage. I told the customer not to hold his breath but that I'd look into it for him. Thanks! Eric SunHarvest (530)798-3738___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Battery bank during peak times
Hi Jesse, If I read this correctly your customer is wanting to go off-grid during peak hours. I recently went through this same thing with a customer. I received feedback from an old SMA tech and some Wrenchers (thread titled "Battery Back-up and Grid Tie"). Here's what I learned: 1. Inverters are more efficient at inverting than charging, anywhere from 5-10%. Add to that about 10% transmission loss...you'll always have significant energy losses associated with trying to put back that power that you're drawing out during those peak hours. Energy loss = $$ loss. 2. Compare the utility peak kWh cost against the cost of cycling the battery bank. Just for an example, let's say for a 48V system you're using 150Ah 12V Trojan AGMs $2000 for 8 batteries. If the specs say those batteries, at 50% discharge, get 1000 cycles in their lifetime, that's $2.00 per cycle. 300Ah X 48V X 50% = 7.2kWh. $2/7.2kWh = $0.28/kWh. Add to that 20% round-trip efficiency losses, you're up to $0.33/kWh. What else does daily, unnecessary cycling add: Extra maintenance? Shortened life so probably should factor in some replacement cost?... 3. Murphy's law says that the power will go out at the end of one of these non-essential discharge cycles. Then what? Probably not worth it. Eric Stikes SunHarvest 530-798-3738 - Original Message - From: Jesse Dahl To: RE-wrenches Sent: Monday, June 24, 2013 8:50 PM Subject: [RE-wrenches] Battery bank during peak times Hello, I was contacted by a local co-op about installing a PV system at their office. At first they wanted a straight grid-tied system, and after they received the bid they changed their minds and now want a battery based system price. What they want now is a system that will allow them to draw the battery bank down starting at 5pm during their peak demand time. Has anyone worked on or installed a system of this type? Thanks as always! Jesse -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Tigo and SMA AFCI - Was: AC coupled, grid-tied Sunny Island - contactor & bypass
Just an FYI for anyone wanting to use Tigo optimizers with SMA inverters incorporating AFCI - According to SMA the Tigo optimizers will not operate with the SMA inverters. They didn't go into detail. They just said the AFCI feature of the Sunny Boy is not compatible with Tigo. After further discussion they acknowledged that disabling the AFCI feature in the Sunny Boy would allow compatibility with the Tigo optimizer. Awesome. After talking this over with Tigo they came to the same conclusion but neither company seemed too happy or confident in the marriage. Awesome. Eric Stikes SunHarvest - Original Message - Wrenches, Here's an update on this configuration (20kW Enphase, AC coupled to Sunny Islands) you should know about: Enphase will not support and warranty the use of their micro inverters in an AC-coupled installation with battery-based inverters. Enphase approved this verbally with us in design, but balked when we asked them to back it up in writing. Their issue/point is that AC-coupling violates the UL1741 listing. Thus, we're revising the design to use Sunny Boy string inverters. Our customer would still like the module-level monitoring and optimization offered by the micro-inverters (there is some shading issue), so we're considering using string optimizers. We have not used string- optimization, yet. It looks like the leading options are Solar Magic and Tigo. Any preferences, cautions, or advice with choosing and using optimizers would be appreciated. Thanks, -Kelly Kelly Keilwitz, P.E. Principal Whidbey Sun & Wind Renewable Energy Systems NABCEP Certified PV Installer WA Electrical Administrator 987 Wanamaker Rd. Coupeville, WA 98239 kelly at whidbeysunwind.com PH & FAX: 360.678.7131 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] FM80
Jesse, I have an FM80 on an array of 2560 STC; all off-grid. The only issue I have is that when my batteries are full, and I have essentially zero loads, and the sun is shining away, my XW will disconnect and my house will lose power. I have to reset the system to get back online. This, I'm pretty sure is not a malfunction of the FM80, but rather an issue with the XW, just haven't had time yet to fully trouble-shoot. I think it's a matter of reconfiguring the XW charging setpoints. I haven't had any direct issues with the FM80 with this STC "over power" set up. Eric SunHarvest (530)98-3738 - Original Message - From: "Jesse Dahl" To: "Wrenches" Sent: Friday, May 24, 2013 8:06 PM Subject: [RE-wrenches] FM80 Hello, I'm working on bid for a system using the FM80 controller. The specs for the controller say the maximum STC wattage for a 24V system is 2500W. The array I want to use has a STC wattage 2550. I called outback to ask if this was "close enough" today and didn't get a reply (holiday weekend?!) I also called the distributor I buy my parts through and they said it wouldn't be a problem. I don't want to lose warranty of something happens. I don't want to use different modules. I don't want to have to add another controller and split up the array just for 50W. Thoughts? Have a good holiday weekend! Jesse Sent from my iPhone ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Battery Back-up and Grid Tie
Should've mentioned that, sealed AGM. And his loads, the ones he wants to run on his CLP, are such that the batts would be cycling daily at least, with a D.O.D. yet to be determined (we're trying to stay above 49%). Eric - Original Message - From: Bill Turberville To: RE-wrenches Sent: Friday, April 26, 2013 12:30 PM Subject: Re: [RE-wrenches] Battery Back-up and Grid Tie Batteries actually do better if they are cycled than if they just sit there. He may actually extend his battery life. What kind of batteries is he using? From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of SunHarvest Sent: Friday, April 26, 2013 2:25 PM To: RE-wrenches Subject: Re: [RE-wrenches] Battery Back-up and Grid Tie I have a crazy...I mean creative customer who wants a BB system so that he can run off-grid during peak and partial-peak rate hours: 1 to 7pm is peak, 7 to 9pm is partial from PG&E. He got this great idea from a tech at a reputable power optimizer manufacturer, whom I will not name here, who said, "you've got the batteries just sitting there; why not put them to work?" Initially he wanted his PV to operate while the sun is shining and the grid is down...and his batteries to supply power when the sun and grid is down. But now he wants his back-up system to do it all. We've touched on all the obvious points: - Peak buying is also peak selling - Physics and efficiency losses determine that the energy he "saves" will never equal the energy he can put back into his system. - Decreased battery life due to increased cycling - Costs for batts and special inverters versus generator What is the definitive argument against BB in general and this "peak shaving" idea in particular? Thanks pros. Eric SunHarvest - Original Message - From: toddc...@finestplanet.com To: RE-wrenches Sent: Friday, April 26, 2013 11:57 AM Subject: Re: [RE-wrenches] Battery Back-up and Grid Tie our power outages generally come from bad weather too... and of course when the weather is bad the pv does next to nothing. so for emergency backup, i recommend a generator. todd On Friday, April 26, 2013 10:33am, "Bill Turberville" said: Not very often, and usually for no more than an hour or two, although it has been down as long as 5 days, either during tornado season, or ice taking down power lines. What these people are looking for is Just In Case a big event happens. They do not want to have all those panels just sitting there. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jay Peltz Sent: Friday, April 26, 2013 12:25 PM To: RE-wrenches Subject: Re: [RE-wrenches] Battery Back-up and Grid Tie Hi bill Just how often is your grid down? Jay Peltz power Sent from my iPhone On Apr 26, 2013, at 10:01 AM, Bill Turberville wrote: I live in a TVA area where there is a Feed In Tariff. Everything that is generated by the PV array feeds into the grid through a Generation Meter that ties-in ahead of the house meter. I have started getting calls from customers who hate having a solar array that does not generate when the grid is down but the sun is shining, but who also want to get the $.12 premium when the grid is connected. We have lots of systems with SMA Sunnyboy inverters, but more with Enphase micro-inverters. Rather than trying to reinvent the wheel, what you found to be the best solution for this type of installation? W.C. (Bill) Turberville P.E. President ECE Solar Electrical Contracting Enterprises LLC 3080 Stage Post Road Suite 107 Bartlett, TN 38133 901-348-9230 ext 101 phone 901-348-2192 fax 901-289-6346 cell billt...@ece-llc.com NABCEP Certified PV Installation Professional 032611-320 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org Sent from Finest Planet WebMail. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-r
Re: [RE-wrenches] Battery Back-up and Grid Tie
I have a crazy...I mean creative customer who wants a BB system so that he can run off-grid during peak and partial-peak rate hours: 1 to 7pm is peak, 7 to 9pm is partial from PG&E. He got this great idea from a tech at a reputable power optimizer manufacturer, whom I will not name here, who said, "you've got the batteries just sitting there; why not put them to work?" Initially he wanted his PV to operate while the sun is shining and the grid is down...and his batteries to supply power when the sun and grid is down. But now he wants his back-up system to do it all. We've touched on all the obvious points: - Peak buying is also peak selling - Physics and efficiency losses determine that the energy he "saves" will never equal the energy he can put back into his system. - Decreased battery life due to increased cycling - Costs for batts and special inverters versus generator What is the definitive argument against BB in general and this "peak shaving" idea in particular? Thanks pros. Eric SunHarvest - Original Message - From: toddc...@finestplanet.com To: RE-wrenches Sent: Friday, April 26, 2013 11:57 AM Subject: Re: [RE-wrenches] Battery Back-up and Grid Tie our power outages generally come from bad weather too... and of course when the weather is bad the pv does next to nothing. so for emergency backup, i recommend a generator. todd On Friday, April 26, 2013 10:33am, "Bill Turberville" said: Not very often, and usually for no more than an hour or two, although it has been down as long as 5 days, either during tornado season, or ice taking down power lines. What these people are looking for is Just In Case a big event happens. They do not want to have all those panels just sitting there. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jay Peltz Sent: Friday, April 26, 2013 12:25 PM To: RE-wrenches Subject: Re: [RE-wrenches] Battery Back-up and Grid Tie Hi bill Just how often is your grid down? Jay Peltz power Sent from my iPhone On Apr 26, 2013, at 10:01 AM, Bill Turberville wrote: I live in a TVA area where there is a Feed In Tariff. Everything that is generated by the PV array feeds into the grid through a Generation Meter that ties-in ahead of the house meter. I have started getting calls from customers who hate having a solar array that does not generate when the grid is down but the sun is shining, but who also want to get the $.12 premium when the grid is connected. We have lots of systems with SMA Sunnyboy inverters, but more with Enphase micro-inverters. Rather than trying to reinvent the wheel, what you found to be the best solution for this type of installation? W.C. (Bill) Turberville P.E. President ECE Solar Electrical Contracting Enterprises LLC 3080 Stage Post Road Suite 107 Bartlett, TN 38133 901-348-9230 ext 101 phone 901-348-2192 fax 901-289-6346 cell billt...@ece-llc.com NABCEP Certified PV Installation Professional 032611-320 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org Sent from Finest Planet WebMail. -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Advanced PV Training Solar Living Institute - class needs students
On the off-chance that anyone out there is interested in an advanced off-grid
training class on the 25th & 26th of this month for about $400 in Hopland, CA...
The advanced off-grid course (PV 290) needs more participants lest it should be
postponed until October. Just thought I'd post because I was planning to take
this course...
Eric
SunHarvest
- Original Message -
From: Jesse Dahl
To: RE-wrenches
Sent: Friday, April 12, 2013 7:49 PM
Subject: Re: [RE-wrenches] Advanced PV Training Recommendations
The MREA (Midwest renewable energy association) offers classes, some on-line
now. Really good Instructors.
www.midwestrenew.org
Jesse
Sent from my iPhone
On Apr 12, 2013, at 8:03 PM, jay peltz wrote:
HI Eric,
I'm going to advise you to look at SEI
Solar energy international.
http://www.solarenergy.org/
Full disclosure, I teach part time from them.
Cheers,
jay
peltz power
On Apr 12, 2013, at 12:46 PM, SunHarvest wrote:
Wrenchers -
I am in need of hands-on advanced training for my own continuing
education. I have a California C46 solar contractor's license and plenty of
experience designing and installing systems. But, as you all know, there are
always more details to master, code issues to be clarified, and new
technologies coming down the pike. I'd like to focus on off-grid and on-grid
w/BB systems over straight grid-tie.
I'm looking at Solar Living Institute as that's here in NorCal, where I
live.
Are there any training schools/programs that you guys would recommend?
My main requirements are that the instructor has 20+ years of hands-on
experience and that the training is hands-on and fully comprehensive. I am
interested in getting NABCEP certified but I'm more concerned with getting
professional, in-depth training than with qualifying for NABCEP exam
requirements.
Thanks!
Eric
SunHarvest
- Original Message -
From: John Berdner
To: RE-wrenches
Sent: Thursday, April 04, 2013 11:44 AM
Subject: Re: [RE-wrenches] Combining conductors
Larry:
Yes, you can parallel conductors (there is an NEC limit on minimum size
allowed to parallel).
You just add the ampacity of the two conductors.
To convince yourself you can also check Table 8 Conductor Properties
and sum the cross sectional areas of all the parallel conductors to see the
equivalency to a single larger conductor.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new
address.)
T: 510.498.3200, X 747
M: 530.277.4894
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Larry Crutcher,
Starlight Solar Power Systems
Sent: Thursday, April 04, 2013 9:51 AM
To: RE-wrenches
Subject: [RE-wrenches] Combining conductors
Wrenches,
Here's a tough one for me to understand. I am installing 2 volt AGM
batteries. There are two terminals for each battery polarity. I have some
height limits so I need to use the minimum wire size. Here's my question: If I
combine two identical conductors, what is the equivalent single conductor size?
I found one "rule of thumb" that says doubling like conductors creates
a AWG decrease of 3. Example: two #2 will be equivalent to 2/0. Is this true?
Thank you,
Larry Crutcher
Starlight Solar Power Systems
CONFIDENTIALITY NOTICE: This e-mail and its attachments are intended
only for the use of the individual or entity who is the intended recipient and
may contain information that is privileged, confidential and exempt from
disclosure or any type of use under applicable law. If the reader of this
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responsible for delivering the e-mail to the intended recipient, you are hereby
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[RE-wrenches] Advanced PV Training Recommendations
Wrenchers - I am in need of hands-on advanced training for my own continuing education. I have a California C46 solar contractor's license and plenty of experience designing and installing systems. But, as you all know, there are always more details to master, code issues to be clarified, and new technologies coming down the pike. I'd like to focus on off-grid and on-grid w/BB systems over straight grid-tie. I'm looking at Solar Living Institute as that's here in NorCal, where I live. Are there any training schools/programs that you guys would recommend? My main requirements are that the instructor has 20+ years of hands-on experience and that the training is hands-on and fully comprehensive. I am interested in getting NABCEP certified but I'm more concerned with getting professional, in-depth training than with qualifying for NABCEP exam requirements. Thanks! Eric SunHarvest - Original Message - From: John Berdner To: RE-wrenches Sent: Thursday, April 04, 2013 11:44 AM Subject: Re: [RE-wrenches] Combining conductors Larry: Yes, you can parallel conductors (there is an NEC limit on minimum size allowed to parallel). You just add the ampacity of the two conductors. To convince yourself you can also check Table 8 Conductor Properties and sum the cross sectional areas of all the parallel conductors to see the equivalency to a single larger conductor. Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Larry Crutcher, Starlight Solar Power Systems Sent: Thursday, April 04, 2013 9:51 AM To: RE-wrenches Subject: [RE-wrenches] Combining conductors Wrenches, Here's a tough one for me to understand. I am installing 2 volt AGM batteries. There are two terminals for each battery polarity. I have some height limits so I need to use the minimum wire size. Here's my question: If I combine two identical conductors, what is the equivalent single conductor size? I found one "rule of thumb" that says doubling like conductors creates a AWG decrease of 3. Example: two #2 will be equivalent to 2/0. Is this true? Thank you, Larry Crutcher Starlight Solar Power Systems CONFIDENTIALITY NOTICE: This e-mail and its attachments are intended only for the use of the individual or entity who is the intended recipient and may contain information that is privileged, confidential and exempt from disclosure or any type of use under applicable law. If the reader of this e-mail is not the intended recipient, or the employee, agent, or representative responsible for delivering the e-mail to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this e-mail is strictly prohibited. If you have received this e-mail in error, please reply immediately to the sender. P Please think of the environment before printing this email -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] GSCM-mini with Honda EM5000SX
Thanks all for the comments. I did not install the batteries, genny, Outback inverter, or Mate, just the GSCM and an RTS. I've given the homeowner a lot of advice along the way but did not touch the other installer's work. It was clear from the beginning that the homeowner knows nothing about off-grid power generation or battery maintenance and that the previous installer didn't bother with code compliance or educating the homeowner on how to operate his own system. Yes, it's one of those. I'm trying to keep my distance while still being available to answer questions. Thanks again guys! Eric Stikes SunHarvest - Original Message - From: William Miller To: RE-wrenches Sent: Monday, March 25, 2013 12:41 PM Subject: Re: [RE-wrenches] GSCM-mini with Honda EM5000SX Eric: The generator-based charging may impose higher currents into the batteries than either PV charging or inverter consumption, triggering the problem. Melted battery terminals are not uncommon. You must have washers under your bolt heads with lead flanges. Otherwise the bolt heads sink into the lead, loosening connections. All mating surfaces need to be newly wired brushed just before assembly. Battery connections need to be re-torqued annually. William Miller At 09:40 AM 3/25/2013, you wrote: Larry, Thanks for your reply. For some reason the schematic I received from the tech at Atkinson did not show any wires being connected to pins 9 & 10 and as I'm a literalist I did not make those connections. After I received your (and other) feedback I connected gen power to those pins and the AGS seemed to function fine. Within 2 days the customer called me back saying his genny was shutting off after 20 mins of runtime. I told him to disconnect or reprogram one system component at a time to find the fault source. Before a fault source was determined, he observed that two batteries in his bank were experiencing the "battery terminals melting into the battery casing" (as was texted to me by the customer). I have no idea how a GSCM interface would cause or allow an overcurrent fault at the batteries but the timing of the installation seems to indicate that the AGS is at fault. Ever heard of this before? Eric Stikes SunHarvest Solar We install solar pool pumps quite frequently here in the Caribbean. We use Sunpumps - excellent company, great support. Email Joe Lines j...@sunpumps.com for design assistance, he is very helpful. On Wed, Feb 20, 2013 at 1:02 PM, William Korthof wrote: A few questions. I have a customer who really wants a solar-direct pool pump for his home. Medium size in-ground pool and I'd like the pump to be strong enough to lift to the solar pool panels (12 ft lift above pool level). I'd like to offer him hardware that is at least one notch above experimental beta-test. I remember the SunCentric from several years ago, but not sure how durable that turned out, and I was having trouble a vendor for it now. Any suggestions for today with some favorable track record? Or suggestions on what to avoid? William Korthof Sustainable Solutions Partners ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org -- Chris Mason President, Comet Systems Ltd www.cometenergysystems.com Cell: 264.235.5670 Skype: netconcepts ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wren
Re: [RE-wrenches] GSCM-mini with Honda EM5000SX
Larry, Thanks for your reply. For some reason the schematic I received from the tech at Atkinson did not show any wires being connected to pins 9 & 10 and as I'm a literalist I did not make those connections. After I received your (and other) feedback I connected gen power to those pins and the AGS seemed to function fine. Within 2 days the customer called me back saying his genny was shutting off after 20 mins of runtime. I told him to disconnect or reprogram one system component at a time to find the fault source. Before a fault source was determined, he observed that two batteries in his bank were experiencing the "battery terminals melting into the battery casing" (as was texted to me by the customer). I have no idea how a GSCM interface would cause or allow an overcurrent fault at the batteries but the timing of the installation seems to indicate that the AGS is at fault. Ever heard of this before? Eric Stikes SunHarvest Solar - Original Message - From: Larry Crutcher,Starlight Solar Power Systems To: RE-wrenches Sent: Friday, March 01, 2013 11:48 AM Subject: Re: [RE-wrenches] GSCM-mini with Honda EM5000SX You need the line and neutral from the generator connected to pin 9 & 10 or the GSCM does not know if the generator is running or not. Larry Crutcher Starlight Solar Power Systems On Mar 1, 2013, at 10:30 AM, SunHarvest wrote: I've installed a GSCM-mini (interfaced with a Honda EM500SX w/manual remote start box) according to the attached schematic provided by Mr. Kendall of Atkinson. The unit is not functioning properly. It seems that the GSCM-mini is not recognizing that the generator is running. Here are the results of my troubleshooting: Start LED (yellow) on GSCM-mini blinks once every 5 seconds to indicate it is ready. When starting the generator using the MATE3 from either the manual Generator Status Menu, or using the auto 2 minute Voltage Start - Generator starts OK, MATE enters RUN mode, no faults listed on MATE, AC IN shows USE AGS, i.e., everything looks OK. But when I press the OFF button on the Gen Status screen the STATUS goes to OFF but the generator will not shut off...until... At the time of manual start the GSCM begins going through the cycle of trying to start the genny then goes into a Lockout Fault Condition: Start LED goes to solid yellow, K1 light comes on, generator starts, K1 light goes off for 40 seconds, yellow Start light is solid, K1 comes back on for 20 seconds, cycle repeats 3 times, K2 light comes on for 5 seconds, Gen Hz LED Fault blinks twice repeatedly, Fault LED (terminal 12) comes on solid, GSCM enters (Max Crank) Lockout Fault, ...then the generator shuts off. Seems the GSCM is not registering a Valid Run Condition. So, either the schematic for the 4000SX is not applicable for the 5000SX or the red wire I connected to terminal 8 (as shown in the schematic, needs to actually go to terminals 9&10, or I need to run a wire from the Pilot LED on the manual remote start box to terminal 8 on the GSCM... Any experience with this scenario? Thanksalot, Eric Stikes SunHarvest Solar - Original Message - From: Chris Mason To: RE-wrenches Sent: Wednesday, February 20, 2013 6:26 PM Subject: Re: [RE-wrenches] Solar-direct pool pumping We install solar pool pumps quite frequently here in the Caribbean. We use Sunpumps - excellent company, great support. Email Joe Lines j...@sunpumps.com for design assistance, he is very helpful. On Wed, Feb 20, 2013 at 1:02 PM, William Korthof wrote: A few questions. I have a customer who really wants a solar-direct pool pump for his home. Medium size in-ground pool and I'd like the pump to be strong enough to lift to the solar pool panels (12 ft lift above pool level). I'd like to offer him hardware that is at least one notch above experimental beta-test. I remember the SunCentric from several years ago, but not sure how durable that turned out, and I was having trouble a vendor for it now. Any suggestions for today with some favorable track record? Or suggestions on what to avoid? William Korthof Sustainable Solutions Partners ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org -- Chris Mason President, Comet Systems Ltd www.cometenergysystems
Re: [RE-wrenches] 24V Module Query
Upgrading to a versatile Midnite or Outback cc seems to me a better investment. Sometimes you can match newer 72 cells with older mods...For example, one new Canadian 280 (35.6Vmp, 44.2Voc) matches up nicely with 2 old Kyo 120's (33.8Vmp, 43Voc) Eric SunHarvest - Original Message - From: Jason Szumlanski To: RE-wrenches Sent: Thursday, January 24, 2013 12:38 PM Subject: Re: [RE-wrenches] 24V Module Query I totally agree - old mods are usually not worth messing with at today's PV prices. In some cases it might be best to downsize the system and then AC couple some microinverters to cover the decrease in performance, or just replace the entire array if there are enough problems. There is a used market for smaller PV mods on Craigslist. Back when I was installing Astropower 110W modules on single voltage Xantrex C40's, I never thought we'd be using anything but 12V nominal PV mods. Little did I know... Off-grid is really tough in these retrofit situations, but this applies to failed/broken mods on grid-tie systems as well. That's where I can make a good case for microinverters. Jason Szumlanski Fafco Solar On Thu, Jan 24, 2013 at 3:11 PM, Ray Walters wrote: Hi Allan; I've been in the same conundrum lately. I found that AEE and others have 12 v modules (Solartech), but the price per watt is double or triple. My take is that somewhere around 200 to 400 watts, its more cost effective to go to the GT modules with an MPPT controller. Blue Sky makes the 1524, and 3024 that can take up to 57 Voc, so those would work at still fairly low cost. Unfortunately many of the other low cost MPPT controllers won't work with the 60 cell modules. At some point, it may actually be cost effective to just use 60 cell modules with non MPPT controllers, and just forget about the extra 24 cells. (I know that sounds crazy, but PV less than $1/ watt is crazy too) I'm trying to add modules to an existing array of 8 Siemens 12 v modules, and it just doesn't work out, except with separate controllers. Also, its amazing how much PV you can throw at an off grid project these days for $10k. It almost makes messing around with the old modules a waste of time. Perhaps the solution might be to remove old arrays for customers wanting to really up size, and then reuse the old modules for small systems? Ray On 1/24/2013 12:35 PM, Allan Sindelar wrote: Wrenches, We have years of installing 36-cell (12V) and 72-cell (24V) modules for battery-based customers. Most of our systems are 24V or 48V nominal. Over the last few years, sources of conventionally-sized 72-cell modules have dried up - as cells have increased in size, most modules and most newer factory production lines have either gone to 60-cell (20V) modules, or 72 cells in 300+ watt ranges. It seems that the formerly common 72 cell, 24V modules in the 150-190 watt range, which are well-suited to integrating into existing systems, are no longer available. 60-cell modules in the common 220-250 watt range can't be added to an existing system unless run through a dedicated MPPT charge controller that can convert voltage, such as an FM, XW60, Classic or TriStar; the added cost of any of these controllers cancels out the low prices of the modules. Who continues to manufacture 72-cell modules? Which distributors carry them? I am aware of three options - are there more? - Sunpower makes one module in the 245 watt range that can be used negative ground, but it's very high efficiency (and with high Voc/Vmp as well) and very pricey; - Sanyo/Panasonic has 225-240 watt modules, but also quite premium and pricey; - Ameresco bought the rights to manufacture many former BP modules, and I think they make some. But we had to replace lots of failed BP modules in that size range, and are hesitant to use their technology, fearing that the problems may persist in the continued line. Thank you for any discussion and recommendations. Allan -- Allan Sindelar 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 -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wr
Re: [RE-wrenches] Awkward Mid-clamps & jigs for installing or removingmodules?
Bill, Have you looked at CreoTec? I personally like the Ironridge racking system much better than ProSolar or Unirac. I've seen plenty of demos with Creotec but haven't had the opportunity to use it yet. Looks very cool though and has some rave reviews. Eric Stikes SunHarvest - Original Message - From: William Dorsett To: 'RE-wrenches' Sent: Friday, January 18, 2013 9:35 AM Subject: [RE-wrenches] Awkward Mid-clamps & jigs for installing or removingmodules? Single-handed mounting for replacing or installing modules on racks. My helper installing an array on an Iron Ridge rack commented (like so many of you have surely thought) that the mid-clamps are really clumsy. His suggestion was that on his, he would lengthen the rail and only use end clamps so each module would be independently mounted, removed or the Enphase replaced. Of course this would apply to UniRack and other mid-clamps too. Can anyone recommend a jig for supporting the line of modules, while they are individually being clamped or unclamped? Perhaps a long length of Al angle braced back to the rail, so the bottoms of the modules can sit in a straight line while they are being clamped. Even a couple sliding Z-shaped spring hooks that can support the bottoms might work one module at a time as long as the rail is s Bill Dorsett Sunwrights 1715 Leavenworth Manhattan, KS 785/539-1956 Home/Office -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] off grid PV connected to generator
>From Maverick: 1. With SellRE enabled, the AGS timers don't work correctly and I doubt it will auto start. I know for sure it will not exercise. >So, gen auto start will only function properly if SellRE is disabled? 2. Even if you turn off SellRE, the GVFX is persnickety about AC IN and I don't think your Genny will sync with the inverter and therefore it will not charge the batteries. >So there's no option to charge batteries with a generator using a GVFX?? Am I hearing this correctly? Thanks Maverick. Eric On Jan 16, 2013, at 11:53 AM, "SunHarvest" wrote: Finally got through to Outback. They said the GVFX could be wired with a genny line-side of the inverter in order for the genny to charge the batteries and that this configuration could potentially cause problems for the genny. The likelihood of the PV sending power to the generator is extremely small as the inverter needs to see 5 minutes of perfect power in addition to sensing a near full battery bank before it will attempt to "sell" power back to the AC source. Additionally, when the genset is connected with the AGS the generator will turn on automatically when the batteries require absorption and automatically turn off when the batteries are "full" (according to set points). The moment when the batteries reach that "full" set point is when the inverter may attempt to "sell" power back but this is when the AGS will shut down the generator. I have, on my house, an older Xantrex SW4024 and it works fine with my Kohler 8.5kW genset but then again, it has two AC-IN inputs which operate in mutual exclusion. Outback mentioned that while the FX series inverters do not enjoy this feature, the Radian inverter re-introduces this configuration. Hallelujah! So, it sounds like the solution for the Outback grid-tied BB system is to install an AGS...which is part of the plan as soon as the homeowner completes some required genny repairs. The solution for the grid-tied Enphase system, it seems, will have to be asking the homeowner to shut off his PV when the grid goes down...Ugh. But reading back through the older posts in this thread, pretty much all recommending against configuring the genset supply-side of the inverter, the question remains, for me at least, how does the generator charge the batteries if the genny is load-side of the inverter? Eric SunHarvest - Original Message - From: SunHarvest To: RE-wrenches Sent: Wednesday, January 16, 2013 8:47 AM Subject: Re: [RE-wrenches] off grid PV connected to generator For claification, the two installs with which I'm concerned are: 1) Grid or 8.5kW Genset ---> Manual transfer switch ---> FlexPower One w/GVFX3524, FM80, Mate ---> transformer to 240vac ---> Residential Loads. This set up also has batteries and an old 600Wstc PV array tied in to the FP1. 2) Grid or ~10kW Genset determined by auto transfer switch, all located at utility main panel/meter located about 400' from main residence ---> Subpanel and sub meter at main residence <--- PV-designated subpanel <--- 8.4kW PV array w/Enphase micros. It's good to hear (thanks Phil) that PV doesn't auto disconnect when the genny kicks on (didn't think this was the case) but if the PV does not disconnect don't we end up with PV potentially backfeeding to the genset?? Isn't this thread discussing how PV backfeeding to a genny is a dangerous configuration?? David, I can't disconnect the GVFX when the grid is down and the genny on as both grid and genset supply the AC-IN to the inverter via the manual transfer switch. But your comment begs the question: Why do you recommend disconnecting the inverter? Still trying to connect to an Outback tech (Katee Wood)... Eric SunHarvest - Original Message - From: David Katz To: RE-wrenches Sent: Wednesday, January 16, 2013 8:12 AM Subject: Re: [RE-wrenches] off grid PV connected to generator Phil, If Eric is using the FX ot GTFX in an AC coupled mode, he would need to disconnect the grid tie inverter when the generator was running. From the thread, I cannot tell if this is his situation. David Katz Sent from my HTC smartphone on the Now Network from Sprint! - Reply message - From: "Phil Undercuffler" To: "RE-wrenches" Subject: [RE-wrenches] off grid PV connected to generator Date: Tue, Jan 15, 2013 8:07 pm Eric, Good questions, and you hit on a number of topics so let me see if I can address them one at a time, not necessarily in chronological order. Yes, the optimal application for the GTFX / GVFX inverter
Re: [RE-wrenches] off grid PV connected to generator
Finally got through to Outback. They said the GVFX could be wired with a genny line-side of the inverter in order for the genny to charge the batteries and that this configuration could potentially cause problems for the genny. The likelihood of the PV sending power to the generator is extremely small as the inverter needs to see 5 minutes of perfect power in addition to sensing a near full battery bank before it will attempt to "sell" power back to the AC source. Additionally, when the genset is connected with the AGS the generator will turn on automatically when the batteries require absorption and automatically turn off when the batteries are "full" (according to set points). The moment when the batteries reach that "full" set point is when the inverter may attempt to "sell" power back but this is when the AGS will shut down the generator. I have, on my house, an older Xantrex SW4024 and it works fine with my Kohler 8.5kW genset but then again, it has two AC-IN inputs which operate in mutual exclusion. Outback mentioned that while the FX series inverters do not enjoy this feature, the Radian inverter re-introduces this configuration. Hallelujah! So, it sounds like the solution for the Outback grid-tied BB system is to install an AGS...which is part of the plan as soon as the homeowner completes some required genny repairs. The solution for the grid-tied Enphase system, it seems, will have to be asking the homeowner to shut off his PV when the grid goes down...Ugh. But reading back through the older posts in this thread, pretty much all recommending against configuring the genset supply-side of the inverter, the question remains, for me at least, how does the generator charge the batteries if the genny is load-side of the inverter? Eric SunHarvest - Original Message - From: SunHarvest To: RE-wrenches Sent: Wednesday, January 16, 2013 8:47 AM Subject: Re: [RE-wrenches] off grid PV connected to generator For claification, the two installs with which I'm concerned are: 1) Grid or 8.5kW Genset ---> Manual transfer switch ---> FlexPower One w/GVFX3524, FM80, Mate ---> transformer to 240vac ---> Residential Loads. This set up also has batteries and an old 600Wstc PV array tied in to the FP1. 2) Grid or ~10kW Genset determined by auto transfer switch, all located at utility main panel/meter located about 400' from main residence ---> Subpanel and sub meter at main residence <--- PV-designated subpanel <--- 8.4kW PV array w/Enphase micros. It's good to hear (thanks Phil) that PV doesn't auto disconnect when the genny kicks on (didn't think this was the case) but if the PV does not disconnect don't we end up with PV potentially backfeeding to the genset?? Isn't this thread discussing how PV backfeeding to a genny is a dangerous configuration?? David, I can't disconnect the GVFX when the grid is down and the genny on as both grid and genset supply the AC-IN to the inverter via the manual transfer switch. But your comment begs the question: Why do you recommend disconnecting the inverter? Still trying to connect to an Outback tech (Katee Wood)... Eric SunHarvest - Original Message - From: David Katz To: RE-wrenches Sent: Wednesday, January 16, 2013 8:12 AM Subject: Re: [RE-wrenches] off grid PV connected to generator Phil, If Eric is using the FX ot GTFX in an AC coupled mode, he would need to disconnect the grid tie inverter when the generator was running. >From the thread, I cannot tell if this is his situation. David Katz Sent from my HTC smartphone on the Now Network from Sprint! - Reply message - From: "Phil Undercuffler" To: "RE-wrenches" Subject: [RE-wrenches] off grid PV connected to generator Date: Tue, Jan 15, 2013 8:07 pm Eric, Good questions, and you hit on a number of topics so let me see if I can address them one at a time, not necessarily in chronological order. Yes, the optimal application for the GTFX / GVFX inverter series is grid tie with battery backup. If you just want backup to the grid, the traditional FX is a great solution. If you need extended run-time and want to integrate a generator, then the Radian series is a better solution because it can not only integrate both grid and generator, but it can change its operating parameters based on which input it's connected to. The SW, XW and Radian inverters are all capable of operating on-grid (grid-interactive or backup) or off-grid (with or without a generator). However, none will automatically disconnect the PV when the genny auto-starts, nor would I suggest that they should. Realistically, the system should only start the genny when the batteries are near depletion -- if it's started, the batterie
Re: [RE-wrenches] off grid PV connected to generator
For claification, the two installs with which I'm concerned are: 1) Grid or 8.5kW Genset ---> Manual transfer switch ---> FlexPower One w/GVFX3524, FM80, Mate ---> transformer to 240vac ---> Residential Loads. This set up also has batteries and an old 600Wstc PV array tied in to the FP1. 2) Grid or ~10kW Genset determined by auto transfer switch, all located at utility main panel/meter located about 400' from main residence ---> Subpanel and sub meter at main residence <--- PV-designated subpanel <--- 8.4kW PV array w/Enphase micros. It's good to hear (thanks Phil) that PV doesn't auto disconnect when the genny kicks on (didn't think this was the case) but if the PV does not disconnect don't we end up with PV potentially backfeeding to the genset?? Isn't this thread discussing how PV backfeeding to a genny is a dangerous configuration?? David, I can't disconnect the GVFX when the grid is down and the genny on as both grid and genset supply the AC-IN to the inverter via the manual transfer switch. But your comment begs the question: Why do you recommend disconnecting the inverter? Still trying to connect to an Outback tech (Katee Wood)... Eric SunHarvest - Original Message - From: David Katz To: RE-wrenches Sent: Wednesday, January 16, 2013 8:12 AM Subject: Re: [RE-wrenches] off grid PV connected to generator Phil, If Eric is using the FX ot GTFX in an AC coupled mode, he would need to disconnect the grid tie inverter when the generator was running. >From the thread, I cannot tell if this is his situation. David Katz Sent from my HTC smartphone on the Now Network from Sprint! - Reply message - From: "Phil Undercuffler" To: "RE-wrenches" Subject: [RE-wrenches] off grid PV connected to generator Date: Tue, Jan 15, 2013 8:07 pm Eric, Good questions, and you hit on a number of topics so let me see if I can address them one at a time, not necessarily in chronological order. Yes, the optimal application for the GTFX / GVFX inverter series is grid tie with battery backup. If you just want backup to the grid, the traditional FX is a great solution. If you need extended run-time and want to integrate a generator, then the Radian series is a better solution because it can not only integrate both grid and generator, but it can change its operating parameters based on which input it's connected to. The SW, XW and Radian inverters are all capable of operating on-grid (grid-interactive or backup) or off-grid (with or without a generator). However, none will automatically disconnect the PV when the genny auto-starts, nor would I suggest that they should. Realistically, the system should only start the genny when the batteries are near depletion -- if it's started, the batteries need all the help they can get. Rather, the generator should only be disconnected (turned off) when the batteries reach the absorb setpoint. BTW, I can't speak for everyone but none of those inverters have that functionality, at least not yet. With 600 Watts of connected PV, I wouldn't worry about disconnecting the PV. Even with a small battery bank, the sun will set before that size of array drives the bank anywhere close to an absorb voltage. Add another zero to the PV size and my answer would be different, of course. Also, if you do wind up installing an automatic transfer switch with a battery-based inverter system, don't allow the ATS to control the generator starting, even if that flies against every tradition of the generator sales guy. You don't want the genny running through every minute of the power outage, you want the system to start the genny only when the batteries are low. Good luck with it, and enjoy the sun! Phil On Tue, Jan 15, 2013 at 1:50 PM, SunHarvest wrote: Further, I recently installed a GVFX for a customer. I'm hearing from certain sources that the grid-tied line of inverters from Outback are not designed to interface with a generator. Really?? I was told by Outback to install a transfer switch line/supply side of the inverter; that this was the only way to interface the genny with the inverter; that the AC Hot In could come from grid or a genset. And indeed, this is the only way I can figure out how to get the genny to charge the batteries when the grid goes down. But then again, I don't have the extensive electrical background that allows me to think outside the box as often as I would like...that's why I'm posing my query here for the pros. In this Outback install I have to again advise the homeowner to open the PV breaker to the inverter during generator operation, right? Even though he has a modest 600W (STC) array and an 8.5kW Kohler genset. Hardly the opportunity for solar to feed back to the genny under th
Re: [RE-wrenches] off grid PV connected to generator
I did. They were less than helpful. At least the two or three different techs I talked to. They sounded as green as me. - Original Message - From: Dan Fink To: RE-wrenches Sent: Tuesday, January 15, 2013 1:54 PM Subject: Re: [RE-wrenches] off grid PV connected to generator Talk to Outback. It's an easy fix, on-site. -- Dan Fink, Executive Director; Otherpower Buckville Energy Consulting Buckville Publications LLC NABCEP / IREC accredited Continuing Education Providers 970.672.4342 (voicemail) On Tue, Jan 15, 2013 at 2:50 PM, SunHarvest wrote: (snip) Further, I recently installed a GVFX for a customer. I'm hearing from certain sources that the grid-tied line of inverters from Outback are not designed to interface with a generator. Really?? (snip) -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] off grid PV connected to generator
I'm a bit confused by this thread and am looking for some clarity. To that end here's an example of a recent installation we completed (under the direction of a licensed electrician, not me (praise the Lord)): Grid & Genset feed Main Panel (genny on ATS) ---> Main panel feeding subpanel ---> subpanel is point of connection for our PV array with Enphase. My understanding is that the inverters will look for an "infinite grid" and sensing none when the grid goes down but instead sensing the genset power, the inverters will not turn on. So, we should have tied the PV system to the main panel, that's what I'm reading from the conversation. This would have been completely cost prohibitive due to trench length. Now should we advise the customer to manually open the PV breakers in the subpanel to be safe? This is what I'm reading from the conversation. Further, I recently installed a GVFX for a customer. I'm hearing from certain sources that the grid-tied line of inverters from Outback are not designed to interface with a generator. Really?? I was told by Outback to install a transfer switch line/supply side of the inverter; that this was the only way to interface the genny with the inverter; that the AC Hot In could come from grid or a genset. And indeed, this is the only way I can figure out how to get the genny to charge the batteries when the grid goes down. But then again, I don't have the extensive electrical background that allows me to think outside the box as often as I would like...that's why I'm posing my query here for the pros. In this Outback install I have to again advise the homeowner to open the PV breaker to the inverter during generator operation, right? Even though he has a modest 600W (STC) array and an 8.5kW Kohler genset. Hardly the opportunity for solar to feed back to the genny under the most sunny and cool of days. I'm more concerned with the Enphase install. The Xantrex SW series inverters are fully capable of operating on-grid or off-grid with a genset. So do those inverters automatically disconnect the PV when the genny auto-starts? And with the Outback, is the Mate supposed to do the same (as long as the genny is operated by the auto-start and not a transfer switch)? Eric SunHarvest ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Fridge recommendations?
Livin' off-grid, just bought Sears Kenmore myself incidentally... Eric Stikes, PM Sustainable Energy Group, Inc. www.SustainableEnergyGroup.com 001.530.798.3738 (Cell) - Original Message - From: "Howie Michaelson" To: "RE-wrenches" Sent: Wednesday, January 09, 2013 12:00 PM Subject: Re: [RE-wrenches] Fridge recommendations? Dave, I've always recommended Kenmore (Sears) which we have - they are reliable, quiet, and a good price point typically (especially if you get it on sale which them seem to have every other week). If you look for the right model, you should be able to get one that comes close to that usage, especially in the smaller models. Sears' website lists the kWh yearly usage last time I looked. Howie -- Howie Michaelson NABCEP Certified Solar PV InstallerT Catamount Solar, LLC Renewable Energy Systems Sales and Service VT Solar Electric & Hot Water Incentive Partner http://www.CatamountSolar.com 802-272-0004 On Wed, January 9, 2013 2:44 pm, Dave Palumbo wrote: 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 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Fw: center feeding Enphase
Jesse - We order at least 1 extra drop for each of our Enphase installs now, just to make things easier. The engage splices are pretty slick but aren't cheap. Those are two options (except that you already have the material...so really only one.) Pulling the slack out of the engage cable works but is not a best practice if it kinks the cable, obviously. I'd go with the engage splices. E.Stikes - Original Message - From: Jesse Dahl To: RE-wrenches Sent: Wednesday, January 02, 2013 8:57 PM Subject: Re: [RE-wrenches] center feeding Enphase I find info about the AC soladeck in my distributors catalog, but I don't find any information about it on Soladeck's website. On Wed, Jan 2, 2013 at 7:18 PM, Jesse Dahl wrote: Hello, I am in the process of installing a Enphase system that requires center feeding the individual 15 modules circuits. I am wondering about wiring the J-Box. I need to cut all of the boxes into the center of the runs of Engauge cable and maintain the 6" of free conductor. To do this, I will need to pull the trunk cable towards the J-Box. There are a few spots where doing this may pull the inverter connection points to far from the inverter. It looks like like the spots where this will be a problem is where the circuit of modules is made up of modules from different North-South rows of racking. I took some rough measurements at the end of the day, but haven't really laid the cable out to check if it will really be problem. I'm sure this is common, and easily fixed, but a conformation from another installer would surely be welcome. Thanks, Jesse -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] EPDM Roof Attachment/Flashing
Last flat roof mount I did was in San Francisco (high winds, strict building codes). We worked with a roofer who requested that we simply place an L-foot on top of a 3-1/2" block of PT wood or IPE and lay the block on a pad of EPDM straight on the roof; lag down an L-foot through the block into the supporting roof members and the roofer would come behind us and flash around the block & foot. Not sure if this will work in your case... Stikes - Original Message - From: wire...@gmail.com To: RE-wrenches Sent: Monday, December 31, 2012 6:17 AM Subject: [RE-wrenches] EPDM Roof Attachment/Flashing Hello Wrenches, Installing rail mounted PV array on a 2 1/2 / 12 pitch EPDM residential roof. It's a flat section of roof in the middle of the house. Need to keep it low so would like to use 3" or 4" Unirac standoffs. The standard 1-6" peel and stick witches hat is fine for a 7" standoff but too tall for the 3-4" standoff. Unirac and Oatey have advised against using the Oatey aluminum flashing although the roofer who did the roof said it would be OK using seam tape between the Oatey and the EPDM. Another roofer I know has said absolutely not. I did find a rubber Masterflash (6" x 6" base) that's a good fit but all their images show it used on metal roofs only and it's not a peel and stick. Can I use it with seam tape and/or caulking. Do I just need to go with the 7" standoff and the standard peel and stick witches hat and forget the low profile? Or is their some other system out there (roof attachment/flashing) that would keep it low. The ridge height is already at the 35 ft limit and the upper row of mod's would go above the ridge with the 7" standoff. I will work with a roofer but would like to figure this out before just turning it over to the roofer Very much appreciate any thoughts. Thank you and Happy New Year to you all. Larry Liesner Design and Installations Elektron Solar, LLC 49 Richmondville Ave Suite 107 Westport, CT 06880 203-557-3127 (office) 203-644-2404 (cell) 203-549-0977 (fax) wire...@gmail.com NABCEP Certified PV Installer (# 032611-184) -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Marine battery bank switch
Decided to check clearance in the back of the switch and curiously found a hairline crack in the casing. Decided to check for continuity between the "1" and "2" settings and sure enough, there was intermittent continuity. Kind of wondering why the thing didn't catch on fire... As always, thanks for the responses guys. Eric Stikes SunHarvest Solar - Original Message - From: Dan Fink To: RE-wrenches Sent: Thursday, October 11, 2012 5:20 PM Subject: Re: [RE-wrenches] Marine battery bank switch Eric; If you set the switch to "1+2" (sometimes labeled "both") then you are paralleling the banks. Set at "1" or "2" it's is not, unless there is another sneaky + current path that you missed. Be sure *everything* positive goes to the main + buss bar, which is then switched between the banks by the big red switch. Also, you might check behind the switch -- there's not much room back there, and it's easy for the + lugs to move and possibly touch while you are torquing the lugs. -- Dan Fink, Executive Director; Otherpower Buckville Energy Consulting Buckville Publications LLC NABCEP / IREC accredited Continuing Education Providers 970.672.4342 (voicemail) On Thu, Oct 11, 2012 at 4:23 PM, SunHarvest wrote: I recently installed a Blue Sea 4-way marine battery switch to switch between two battery banks, one new bank and one old bank. I was hesitant to connect the negative home-runs from both banks onto one common bus (connected directly to a ground rod), which then connects back to the DC load center at the inverter. But that's how I was advised to wire it by an electrician friend. It appears now that the newer bank was performing quite a bit better prior to being connected to the marine switch (and neg lead to the neg bus) and the old bank is now performing better than before. I think my electrician buddy was incorrect and that even the positive leads being on a switch and neg lead on a neg bus, the banks are still, to some extent, effectively paralleled and that the new bank is being pulled down by being indirectly connected to the old bank. Thoughts and advice on how to correct the wiring if needed? Sorry to ask such a simple question, I'm just a little rusty on off-grid. Thanks guys. Eric Stikes SunHarvest Solar -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org <>___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Marine battery bank switch
Thanks Allan, I always value your insight. There is a TriMetric on this system but I'm looking at the FM80. I wrestled with the idea that the systems are connected as the circuits between the two banks are not complete. However, as soon as I made the connections the voltage on the new bank dropped and the old bank "seemed" to be rejuvenated. Yes, it could simply be an issue of I didn't witness a "drop" but before and after voltage was off by about 2 volts (down from 25 to 23) according to the charge controller. Not a lot but enough to raise an eyebrow. Eric - Original Message - From: Allan Sindelar To: RE-wrenches Sent: Thursday, October 11, 2012 4:00 PM Subject: Re: [RE-wrenches] Marine battery bank switch Eric, It still doesn't make sense to me. Unless you have a complete circuit, the banks are not in parallel, and your switch on the positives prevents a complete circuit of both at the same time. Common negatives should not be an issue - after all, in a standard off grid system, the DC - and the AC neutral are common to the same ground rod and thus equipment bonding. A Trimetric TM2025 has a second battery voltage sense function that requires the negatives be common; mine tells me the voltage of my main 24V system and my 12V generator starting battery, and all works well. So I question your perception that one is stronger and the other weaker. How do you perceive this new difference, and could it simply be a error in perception? One issue with a switch on two banks is that you can't use a single amp-hour meter, such as a TriMetric. So I would tend to place less value on subjective perception without the metrics to back it up. Allan Allan Sindelar 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 On 10/11/2012 4:23 PM, SunHarvest wrote: I recently installed a Blue Sea 4-way marine battery switch to switch between two battery banks, one new bank and one old bank. I was hesitant to connect the negative home-runs from both banks onto one common bus (connected directly to a ground rod), which then connects back to the DC load center at the inverter. But that's how I was advised to wire it by an electrician friend. It appears now that the newer bank was performing quite a bit better prior to being connected to the marine switch (and neg lead to the neg bus) and the old bank is now performing better than before. I think my electrician buddy was incorrect and that even the positive leads being on a switch and neg lead on a neg bus, the banks are still, to some extent, effectively paralleled and that the new bank is being pulled down by being indirectly connected to the old bank. Thoughts and advice on how to correct the wiring if needed? Sorry to ask such a simple question, I'm just a little rusty on off-grid. Thanks guys. Eric Stikes SunHarvest Solar ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org -- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org <>___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Marine battery bank switch
I recently installed a Blue Sea 4-way marine battery switch to switch between two battery banks, one new bank and one old bank. I was hesitant to connect the negative home-runs from both banks onto one common bus (connected directly to a ground rod), which then connects back to the DC load center at the inverter. But that's how I was advised to wire it by an electrician friend. It appears now that the newer bank was performing quite a bit better prior to being connected to the marine switch (and neg lead to the neg bus) and the old bank is now performing better than before. I think my electrician buddy was incorrect and that even the positive leads being on a switch and neg lead on a neg bus, the banks are still, to some extent, effectively paralleled and that the new bank is being pulled down by being indirectly connected to the old bank. Thoughts and advice on how to correct the wiring if needed? Sorry to ask such a simple question, I'm just a little rusty on off-grid. Thanks guys. Eric Stikes SunHarvest Solar ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Best practices for comp shingle flashing?
Thanks guys. Talked with TTi and mentioned Mr. Miller's experience with rust. They said they got a lot of feedback about this problem on their 1st generation line and have since corrected the issue. I'll remain cautious...thanks Willy. TTi, DPW, EcoFasten, and Quick-mount all seem to have the same issue of lacking versatility in height adjustment. Anyway, going to check out a sample from TTi. DPW and EcoFasten look like they still require cutting of both flash base and comp courses. I'm trying to avoid cutting anything as I want to avoid disturbing original flashing and original roofing material. Thanks for all your input!! Eric Stikes SunHarvest Solar A Sustainable Energy Group Partner +1 (530) 798 - 3738 www.harvesthesun.com ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Dankoff 48Vdc replacement brushes?
Customer in need of replacement brushes for a Dankoff SunRise submersible 5226 48Vdc pump. Part number for brushes is BSH-5000. I keep getting the, "Sorry, they don't make those anymore" response from my suppliers. Anyone have them? Windy? Thanks! Eric Stikes SunHarvest Solar A Sustainable Energy Group Partner +1 (530) 798 - 3738 www.harvesthesun.com___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Best practices for comp shingle flashing?
Hey guys, What's the consensus on the best practice for flashing roof penetrations on existing (not new) comp shingle roofs? I don't like Oatey because the boot degrades quickly and even shaded under the modules I don't like the idea of using an inferior product. The flashing on Master flash is quite extensive; I don't like disturbing the established roofing material as much as is required with Master Flash...nor do I like the idea of having to trim so much of the flashing. Quick-mount is easy but I really don't like the lack in height versatility plus the fact that there is no decent way of retracting the lag bolt. I know there must be a better way. I recall in the old days (old for me anyway) we used to just mount L-feet to the shingles and on my own house I mounted stand-offs directly to the shingles because I'm confident in that method. But, I need something with more insurance when working on other people's homes. William, what are you using these days? Eric Stikes SunHarvest Solar A Sustainable Energy Group Partner +1 (530) 798 - 3738 www.harvesthesun.com___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Trina modules and SolarEdge Inverter experience: Peace of mind?
Hi Wrenches - I have a homeowner who is trying to save some money by going with Trina modules instead of Schott and SolarEdge instead of SMA but he's concerned about performance. I don't have enough experience with either of these manufacturers to give him the peace of mind he seeks. I can confidently recommend SMA and a handful of module makers but am having a hard time here. Anyone with good or bad experiences with either Trina modules or SolarEdge inverters? Thanks! Eric Stikes SunHarvest Solar A Sustainable Energy Group Partner +1 (530) 798 - 3738 www.harvesthesun.com___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Low power production at a winery: DC voltage drop upon SB6000 start-up
Hello Wrenches, I am helping a client troubleshoot a complaint about underproduction of his on-grid system installed about 6-8 years ago. At first I thought I might encounter the bad Kyocera KC120 issue but it turns out they have BP170's, 40 of them for an STC power rating of 6.8kW. Ratings of the BP modules: PTC=150.7, Vmp=35.4, Voc=44.2, Imp=4.8, Isc=5 The system has four panels of ten modules wired in series for a nominal rating of about 350v, 4.8a per string. At the DC disconnect (first accessible combiner) I measured: All strings right at about 375v(oc), 4.7a(mp). After the strings are combined, at the DC input of the SB6000 (with the AC power to the inverter OFF) I measured about 375V as expected. Once the AC power is connected, the SB6000 starts up, and MPP operation is initiated, the DC voltage drops to about 280V, and amps sit between 14 & 15A. I didn't think the voltage was supposed to drop upon MPP tracking...especially this much. This voltage drop would account for the observed power loss between actual and rated production values. I'm going to check with SMA but I wanted to ask the experts here too, as someone may advise something like, "Oh yeah, BP modules have a similar defect as the Kyocera..." My questions: Is the DC voltage supposed to drop significantly in MPP mode on these inverters? If not, does this indicate a bad inverter? Anyone know of problems with BP modules manufactured around 2006-2008? The Kyocera modules showed good volts and amps until a load was connected. Seems like a similar issue here. Eric Stikes SunHarvest Solar A Sustainable Energy Group Partner +1 (530) 798 - 3738 www.harvesthesun.com___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Battery Experience
Just got talked into buying Crown (395Ah@20Hr) as my local rep, "the battery expert", was persuasive in his testimony to their reliability. Should've consulted wrenches first. Should I be worried?? Eric Stikes SunHarvest Solar +1 (530) 798 - 3738 www.harvesthesun.com___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Troubleshooting Off-grid PV...Resolution
The KC120's turned out to be faulty. Kyocera replaced all 12 of the bad KC120's with refurbished KC120's and requested an invoice for my labor to complete the exchange. I tested the new and old modules side by side and both registered the same voltage and amperage. It's only under load when the power failure is apparent. This is why I initially ruled out the modules as being the problem. Thanks for all your help wrenchers! Eric Stikes Owner SunHarvest Solar +1 (530) 798 - 3738 www.harvesthesun.com___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Troubleshooting Off-grid PV...Bad batch of KC120's
Hi Wrenches, Thanks for all your input. I took the advice of those wrenchers suggesting I had bad modules and am in the process of dealing with Kyocera - will update when I have received their final answer. My problem was that when I tested the modules they showed normal Voc and Isc. But I was testing them, albeit in direct sunlight, after storing them for the evening so they were cool and unloaded. When I tested them on the roof after being loaded up and exposed to higher temperatures, their performance diminished to nearly zero. So, after testing the mods on the ground, I thought I had production from my array and was suspect of the other components. I know my batteries are on their way out. But just how far out the door?...more testing... Eric Stikes SunHarvest___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Troubleshooting Off-grid PV...second try with server up
Sorry. I have to re-post this as my local, small-town email provider's server crashed the day I sent this out. I couldn't receive any responses. Hi Wrenches, I inherited an off-grid PV system that seems to be significantly under producing. I have: 12 KC120's (~19V 7A each) paired up 2 in series, for 6 strings terminated on new 15A breakers in a new Midnite combiner, Output of combiner passes through a 60A breaker into a RV SolarBoost 50 charge controller. An SW4024 ties in the CC, a Kohler 8.5 Gen set, and a Yuasa 24V battery bank. My problem is that I never see more than about 5A (displayed at charge controller) coming off the array, even in full sun, regardless of the state of charge of the batteries. I figure I should see, at least once in a while, closer to between 20-30A. Batteries are, admittedly, passed their life expectancy as the system was installed in '02 and I am sure this is part of the problem. I'm thinking that if the batteries are at about 1/2 capacity (don't own a hydrometer...yet), the controller senses the batteries are near full SOC even at lower voltage (~24V) and is therefore attempting to trickle charge even in the bulk stage. Though this is not how the CC is supposed to function in bulk, obviously, I'm assuming the old batteries are altering the standard operating conditions of the system. I've adjusted the Bulk set point on the CC but that doesn't seem to make a difference. I doubt this is part of the problem but the generator is problematic as well (it has it's own array of maladies). Any insight is greatly appreciated. Thanks! Eric Stikes Owner SunHarvest Solar +1 (530) 798 - 3738 www.harvesthesun.com___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
