[RE-wrenches] Enphase 210s
Are the Enphase 210s only compatible with the Sanyo mods? Thanks, marco ___ 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] kW/MW v. kWh/MWh
I'm reading a piece on energy storage in the latest issue of Distributed Energy mag. The writer, Lyn Corum, repeatedly refers to the capacity of storage mediums (thermal, compressed air, flywheel, battery) in kW and MW terms. Heck, even my friends at Beacon Power refer to their flywheel systems in MW terms. Am I missing something here? Shouldn't all references to energy storage be in kWh and MWh terms? Or am I experiencing a d'oh! moment? Marco ProVision 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] Walt Ratterman
I heard that fellow Wrench Walt Ratterman is MIA in Haiti. Anyone have any news? marco ___ 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] Rennsteig Crimper
Well, after reading all of those helpful posts, I decided to order two of the Rennsteig crimper pliers for the MC4 connectors. I purchased them directly from Rennsteig in Ohio for $225/each. MC wanted close to $400 for their tool. I'll let you all know what my guys think about using them. On another subject, have any of you used the Schletter-brand mounting hardware? Any comments? Thanks, marco provision_highres_solar_logo2 with C-26351 Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image001.jpg___ 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] calculating DC voltage line loss
Can anyone pass on a good website address that provides the means to calculate DC line loss over distance? The ones that I've come across don't allow for entering in whatever you want as far as specified DC voltage. Thanks, marco provision_highres_solar_logo2 with C-26351 Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image001.jpg___ 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] DC lightning arrestors
Is the best one can do as far as high DC array voltage the Delta LA602? Didn't they used to have a high voltage version of the LA302DC? Thanks, marco provision_highres_solar_logo2 with C-26351 Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image001.jpg___ 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] DC lightning arrestors
Amen, brother, and a women as well. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of robert ellison Sent: Friday, April 16, 2010 12:37 PM To: RE-wrenches Subject: Re: [RE-wrenches] DC lightning arrestors I think that the high voltage unit is the 602, there are units available from other manufacturers but they are a boat load of money and still require prayer. Bob On Fri, Apr 16, 2010 at 6:31 PM, Marco Mangelsdorf ma...@pvthawaii.com wrote: Is the best one can do as far as high DC array voltage the Delta LA602? Didn't they used to have a high voltage version of the LA302DC? Thanks, marco provision_highres_solar_logo2 with C-26351 Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile www.provision-solar.com http://www.provisiontechnologies.com/ ___ 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 http://www.members.re-wrenches.org/ image001.jpg___ 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] Volcanos and reduced solar production
Pat, Kicked your butts as far as lower output? If so, by how much on a percentage basis? On the Big Island of Hawaii, we've had a very active volcano doing its thing since 1983. With the normal trade winds, the vog (volcanic smoke + fog) gets blown south past the volcano, around the south tip of the island and then back up along the west side of the island. Which means that Kona-side residents can be in a yucky vog zone for days and sometimes longer. Think L.A. on a smoggy summer day. And as far as percentage decrease in solar output, I really have little accurate clue. Marco ProVision Solar Kicked out butts, in fact. Pat Redgate Ameco 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] Volcanos, reduced solar production and kWh performance warranties
This thread brings up a very timely issue that I’m dealing with right now with PV Power Purchase Providers. As an integrator providing turnkey PV systems of X kW, I’m being asked to contractually agree to a minimum performance warranty for said PV systems. I am EXTREMELY uncomfortable to any such clause in any contract that I would sign. I have strong confidence in my PV design capabilities and engineering support and in my professional crew to install a top-quality PV system. I have a lot less confidence in an inverter manufacturer being able to get to a site on a Hawaiian island in the middle of the Pacific in a super timely fashion as the lost PV kWhs rack up. And as I mentioned in a previous post today, we have an active volcano here that’s been spewing since 1983, a volcano that could get a lot worse on any given day. I’m leaning strongly against agreeing to any such clause. Way too bad a precedent to set. Way too much of a liability. Anyone else had to deal with this bugger of a performance warranty demand? Thanks, marco ProVision Solar Marco: Our production schedule has been in tatters - lowered by perhaps 30% because of the rain can't plan, can't do. Then I pay overtime on good days to (try to) catch up. We have a number of systems online and I had not thought to actually review and compare from this year to last. I'll let ya know. We'll get a call like - My bill is higher than last year (edison has a bar graph of monthly consumption for the past 13 months) and I'd like you to look at my system or My meter is not going backwards, should I call edison? The weather is so consistently wet this winter (think Hilo) that we usually just need to ask- Been outside lately? But everywhere is so green and the desert bloom is outrageous. http://www.desertusa.com/wildflo/ca.html Pat Redgate Ameco Solar In a message dated 4/25/2010 12:24:53 P.M. Pacific Daylight Time, ma...@pvthawaii.com writes: Pat, Kicked your butts as far as lower output? If so, by how much on a percentage basis? On the Big Island of Hawaii, we’ve had a very active volcano doing its thing since 1983. With the normal trade winds, the vog (volcanic smoke + fog) gets blown south past the volcano, around the south tip of the island and then back up along the west side of the island. Which means that Kona-side residents can be in a yucky vog zone for days and sometimes longer. Think L.A. on a smoggy summer day. And as far as percentage decrease in solar output, I really have little accurate clue. Marco ProVision Solar Kicked out butts, in fact. Pat Redgate Ameco Solar No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.814 / Virus Database: 271.1.1/2833 - Release Date: 04/24/10 20:31:00 ___ 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] looking for Enphase
As in Enphase 190s, S11 version, with the MC3 connectors. As in about 100 of 'em. Anyone have any suggested sources? Thanks, marco ___ 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] suggested scary language
For a high voltage DC junction box? As in touch these wires and die or something similar? Thanks, marco provision_highres_solar_logo2 with C-26351 Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image001.jpg___ 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] Solmetric Suneye 210
Anyone have a line on a well-priced Solmetric Suneye 210? The cheapest I've found so far comes to a bit under $1,900. Thanks. marco provision_highres_solar_logo2 with C-26351 Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image001.jpg___ 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] Enphase performance
My biz partner has an Enphase system with BP Solar mods. He believes that the web-based monitoring system may be reporting on the high side as far as kWH performance over time. That is, he suspects that what he's seeing may not be accurate. Anyone out there have a similar experience? Thanks, marco ___ 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: Enphase performance
Marco, I have a revenue grade kWh meter on my 3 Enphase 175 system that is owned by the utility (production based incentive in WA state) and the Enphase monitoring reads about 6% over the revenue meter. This has been over a one year period. I've been very pleased with the performance using either measurement. Brad AEE 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] Enphase performance
I just don't understand why going over 20 percent of module nameplate to nameplate inverter rating makes any sense. I regularly see 120-130 percent of nameplate amperage coming off of the array on our office due to edge of cloud. So I have to disagree with Dana in this instance. I see this a bad design especially since lower output mods are so readily available these days. And what's up with the Enphase 210? Doesn't it say on their latest compatibility list (March 2010) that it's only good for the Sanyo line? What's up with that especially since I know that one other manufacturer is signing off on using the Enphase 210 with their 210-watt module, apparently with Enphase's approval? Marv-why is your Enphase 210 only listed for use with the Sanyo line when there's a growing number of 210+ watt mods out there these days? Thanks, marco I've been concerned about pairing higher wattage modules (~230W) with the 190W Enphase fearing a lot of clipping and power loss when the modules are at full power. I did some modeling of this setup in PVSYST and found that the expected loss from the inverter being underpowered is 0 - 0.2% annually depending on the assumptions. The modeling was for northwestern Washington State. A fifth of a percent seems pretty negligible to me and is easily offset by removing module mismatch from the equation. So, I'm convinced that matching modules in the 230W range with the 190W Enphase inverters is a good design. I recently installed 4kW of 230s with the Enphase 190s and have seen their output as high as 199W. Dana Dana Brandt Ecotech Energy Systems, LLC www.ecotechenergy.com d...@ecotechenergy.com 360.510.0433 On Fri, May 7, 2010 at 4:48 PM, Chris Worcester ch...@solarwindworks.com wrote: Do the Enphase inverters clip the output power to their rating like other manufacturer's? So a M190 can only put out 190 watts max? I have had this question for a bit now on system performances using Enphase in designs during our cold spring and fall days. Sincerely, Chris Worcester Solar Wind Works NABCEP Certified PV Installer Phone: 530-582-4503 Fax: 530-582-4603 www.solarwindworks.com http://www.solarwindworks.com/ ch...@solarwindworks.com Proven Energy Solutions From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Mark Westbrock Sent: Friday, May 07, 2010 10:33 AM To: RE-wrenches Subject: Re: [RE-wrenches] Enphase performance The over-reporting of energy that Randy refers to below was much higher than any discrepancy based on monitoring resolution. We have a pyranometer at the site, and Enphase reported energy production as high as 38% higher that predicted from irradiance data, as well as 38% higher than the string inverter portion of the same system. Individual microinverters showed instantaneous power output as high as 285 W from a nominal 190 W unit. Enphase explained that there was a software glitch that was resulting in double counting. It took them over two months to correct this issue, time which is lost from our experimental comparison of string vs. microinverter. They indicated that this seemed to be an isolated situation, but I wonder how many Enphase customers are reporting miraculous performance from their system without verifying via another meter. Screen shot of a day's power production of 22 M190 microinverters (nominal 4180 watts AC): Error! Filename not specified. Mark Mark Westbrock NABCEP Certified Solar PV Installer NM ER-1J Journeyman Electrician Positive Energy, Inc. office: 575-524-2030 cell: 575-640-2432 westbr...@positiveenergysolar.com www.positiveenergysolar.com We definitely experienced an overstatement. We have a client who installed 5kW on a string inverter and 5kW on enphase and it is that side-by-side comparison that enabled us to positively identify a problem. There was a significant overstatement of output. We finally got a Enphase person who told us it was a software glitch. The problem appears to be fixed. They explained to us that our problem was isolated without giving us a detailed explanation of what happened. Since that problem was fixed, we have seen no difference in output between a string inverter and enphase. Randy Kirpal Khalsa wrote: This same issue has come up over the years for us..first with PV Powered inverters and then noticed in Fronius as well..We have noticed in most of our grid tied systems that are connected thru a revenue grade meter for Oregon Energy Trust production reporting, that the inverter always has a higher performance than indicated on the utility grade meter. We have seen the discrepency as high as 10%. Over time this adds up to significant kWh differences. In our experience the inverter always has the higher kWh reporting, we have attributed this to the inverter wanting to report a good production number, to boost their efficiency claims..maybe even more than is accurate.I
[RE-wrenches] current carrying conductor
Thanks for sending that link, William. OK.let's try it from a different perspective. When you're running, say, three three-phase hot conductors from point A to point B with a neutral conductor, should that neutral be considered current carrying from the perspective of more than three current carrying conductors in a raceway? And thereby necessitating de-rating the current carrying capacity of the hot conductors? marco Marco: You have opened a can of worms. I hope you are happy! Are you looking for the legal definition or to discover if the neutral conductor actually carries current? The answer to the legal definition is in 310.15(B)4 (2002), and the answer is: It depends (on the type of service). This on-line article sums it up well: http://ecmweb.com/nec/code-basics/electric_conductor_size_matters/ William Miller PS: In my opinion, the neutral is a current carrying conductor in any system. Disconnect it at your peril. William At 02:41 PM 5/13/2010, you wrote: Content-Type: multipart/alternative; boundary==_NextPart_000_0078_01CAF291.3BA43F40 Content-Language: en-us I have a disbelieving business partner who believes that the neutral conductor in a standard 120/240VAC service is a current carrying conductor. Could someone please disabuse him of that notion? Thanks, marco No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2870 - Release Date: 05/12/10 20:26:00 ___ 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] current carrying conductor
How about some clear definitions-for-dummies of 1) linear loads and 2) non-linear loads? marco Marco: Will non-linear loads be expected? If so, the neutral is considered to be a current carrying conductor and needs to be counted. If no non-linear loads, then the neutral is not counted. Code citation below (2008): 310.15(4) Neutral Conductor. (c) On a 4-wire, 3-phase wye circuit where the major portion of the load consists of nonlinear loads, harmonic currents are present in the neutral conductor; the neutral conductor shall therefore be considered a current-carrying conductor. William Miller PS: Who's buying dinner, you or your partner? Wm At 09:17 PM 5/13/2010, you wrote: Content-Type: multipart/alternative; boundary==_NextPart_000_02F9_01CAF2C8.8607F590 Content-Language: en-us xmlns:ns0=urn:schemas-microsoft-com:office:smarttags Thanks for sending that link, William. OK.let's try it from a different perspective. When you're running, say, three three-phase hot conductors from point A to point B with a neutral conductor, should that neutral be considered current carrying from the perspective of more than three current carrying conductors in a raceway? And thereby necessitating de-rating the current carrying capacity of the hot conductors? marco No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2870 - Release Date: 05/13/10 08:26:00 ___ 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] Solmetric Suneye 210
Has anyone had any experience with the fairly new Solmetric Suneye 210 shading analysis tool? Feedback and observations? Or how about with their earlier version the Suneye 110? Thanks, marco provision_highres_solar_logo2 with C-26351 Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image001.jpg___ 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] MC 4 connectors
Anyone have a good line on MC 4 locking connectors? Thanks, marco ___ 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] MC 4 connectors
Have you ever tried to get a return phone call from Multi-Contact in Petaluma? Rots of ruck.. Is Wieland a manufacturer of knock-off MC connectors? marco Marco: Multicontact or Wieland. William Miller At 10:43 AM 5/18/2010, you wrote: Content-Type: multipart/alternative; boundary==_NextPart_000_00BE_01CAF65D.C1078F50 Content-Language: en-us xmlns:ns0=urn:schemas-microsoft-com:office:smarttags Anyone have a good line on MC 4 locking connectors? Thanks, marco No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2880 - Release Date: 05/17/10 08:26:00 ___ 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] MC 4 connectors
You got that right. marco Ive gotten a few replies from MC in Petaluma today, but they were all to make me revise my PO? I've never worked with a company that was so difficult and un-interested in my business. Nick Soleil Project Manager Advanced Alternative Energy Solutions, LLC PO Box 657 Petaluma, CA 94953 Cell: 707-321-2937 Office: 707-789-9537 Fax: 707-769-9037 _ From: Marco Mangelsdorf ma...@pvthawaii.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Tue, May 18, 2010 11:13:02 AM Subject: Re: [RE-wrenches] MC 4 connectors Have you ever tried to get a return phone call from Multi-Contact in Petaluma? Rots of ruck…. Is Wieland a manufacturer of knock-off MC connectors? marco Marco: Multicontact or Wieland. William Miller At 10:43 AM 5/18/2010, you wrote: Content-Type: multipart/alternative; boundary==_NextPart_000_00BE_01CAF65D.C1078F50 Content-Language: en-us xmlns:ns0=urn:schemas-microsoft-com:office:smarttags Anyone have a good line on MC 4 locking connectors? Thanks, marco No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2880 - Release Date: 05/17/10 08:26:00 ___ 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] desperately seeking MC4 connectors
Anyone have any line on some MC4s or have some, even a paltry quantity, that they're willing to part with? Thanks, marco ___ 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] calculating DC voltage drop
When calculating the voltage drop from a PV array to the inverter, what's the most common accepted practice? To use the Isc X 1.25 or 1.56 as the multiplier? Thanks, marco ___ 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] #10 THWN-2
Finding that wire in these here parts is pretty much impossible. Can any of my CA. brethren/sistren provide me any leads on wholesalers in either northern or southern CA. that carry #10 THWN-2 wire? Thanks, marco ___ 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] #10 THWN-2
I've been looking hard to see what manufacturers produce this kinda elusive #10 THHN/THWN-2 wire. United Copper Industries (Texas) does. I have a handy spec sheet from them that I can email anyone who's interested. marco ___ 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] 3-phase kWh meters
Anyone know where to go for reconditioned 3-phase kWh meters (other than Austin International)? Thanks, marco ___ 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] Aluminum conduit LBs
Anyone know where I could go to find out the max conductor sizes that threaded Al. LBs can handle? I learned the hard way that a conduit of X inches that can handle conductors of a certain size does not necessarily mean that a LB of the same diameter can handle the same size conductors. Thanks, marco ___ 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] Aluminum conduit LBs
The lesson was that even if, say, for a 2 ½ conduit says three 350 MCMs are OK, that doesnt mean that a 2 ½ LB I was planning on using is rated for three 350s. For the first time ever I saw printed in the LB itself the specified max conduct size, in this case 4/0 for a 2 ½ LB. So for this short conduit run I upsized everything to 3. I looked at the Thomas and Betts spec sheet kindly supplied by Ratico on their LB offerings and there was no notation of max conductor sizes that I could find. marco Marco, I'm curious to know what you did after the hard lesson. Was it an issue of difficult/impossible installation, or an AHJ issue? It seems like the most straightforward solution in a situation like this is to replace your conduit bodies (LBs in this case) with a larger size, and then install reducers in order to leave the existing conduit runs intact. I'm looking at an upcoming installation where I would like to use 1-1/4 EMT, but will need 1-1/2 conduit bodies to be ok with wire fill. -Hans _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Marco Mangelsdorf Sent: Thursday, August 12, 2010 8:19 PM To: 'RE-wrenches' Subject: [RE-wrenches] Aluminum conduit LBs Anyone know where I could go to find out the max conductor sizes that threaded Al. LBs can handle? I learned the hard way that a conduit of X inches that can handle conductors of a certain size does not necessarily mean that a LB of the same diameter can handle the same size conductors. Thanks, marco No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.851 / Virus Database: 271.1.1/3067 - Release Date: 08/12/10 08:34:00 ___ 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] phase rotation wiring
There are two situations one can find when working on three-phase AC systems: a clockwise or counterclock phase rotation. Is it correct to assume that a CW rotation would be color-coded (for 120/208V) from left to right black-red-blue while CCW rotation would be, say, red-black-blue? Or whether it's a CW or CCW phase rotation, is the color coding always going to be black-red-blue (again for 120/208)? Thanks, marco ___ 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] modules and inverter poll
What is your no. 1 preferred PV module manufacturer and why? I'm not looking for a dissertation, but a sentence or two. And while I'm at it, how about inverter manufacturer as well? I'll tabulate all the answers for those interested. Thanks, marco ___ 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] The Demise of Reason, SunPower and WEEBs
One point of clarification regarding SunPower Corp. and WEEBs having just had communication with them today on this subject. SunPower has yet to officially approve/sign off on the use of WEEBs with their metal-framed modules. They have been exploring the issue but have yet to give their seal of approval on the WEEB as a grounding means for their modules. marco Hi Bill; 690.43 seems to practically spell out acceptance of the WEEB. and then it cross references article 250.136A. 250.136 EQUIPMENT CONSIDERED GROUNDED (A)Electrical equipment secured to and in electrical contact with a metal rack or structure provided for its support (Is it the undefined in electrical contact?) Third, in the NEC 2008 hand book, Exhibit 250.53 shows several generic (j-boxes, could be any electrical device?) mounted to a metal rack, with one bonding jumper from the rack to ground. It seems to make a case that we don't even need the WEEB, that star washers on bolts to the frame would be acceptable, as long as the frame were grounded. On an Outback prewired powerboard (for example), all the equipment is considered grounded (and passes as a UL assembly) simply by being bolted altogether on a powder coated steel backing plate. Is this also a voltage issue, for arrays over 250 v? I'm sure I'm missing something. I recall you once saying that UL doesn't even use the grounding hole when testing modules, that they just clamped an alligator clip to the frame? Thanks for giving us the NEC and beyond viewpoint, Ray Walters We need a more generic approach to grounding and that is what is currently underway. Amen Grounding and bonding is extremely important and jurisdictions are focused on it for obvious safety reasons. We need solutions that are clearly reliable and straightforward so that installers and jurisdictional authorities don't have to constantly be revisiting the issue. Bill. -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Peter Parrish Sent: Monday, September 13, 2010 7:18 AM To: 'RE-wrenches' Cc: 'Christopher Flueckiger'; 'Tim Zgonena' Subject: Re: [RE-wrenches] The Demise of Reason Bill (and Chris and Tim), Be a little bit more careful in your choice of subjects...? I am shocked, shocked that you would use that tone with me. If you would re-read my post, I talked about three things: (1) SunPower's no longer supporting the WEEB clip technology and regressing to the ILSCO GBL-4DBT. You are right about the insertion of the star washer between the lug and module frame. I wonder what SP's response to that might be... (2) As for SP's comment that they pulled the WEEB clip, due to UL testing changes. Does anyone close enough to the situation know what this means? (3) I never mentioned the SP IFF clip. I mentioned the Tyco SolKlip. SP mentions the IFF in their literature but do not offer it to their dealers (as far as I know), and I haven't been able to find it yet in their product literature, except for a small low-resolution image. I assumed that the Tyco SolKlip was a different component -- however it may be similar or may be rebranded by SP as the IFF -- I don't know. Bonding PV arrays and their supporting structures is complicated subject and in my experience is one of the more frequently examined aspects of PV installations by inspectors (along with bonding and grounding the other components). So it would seem to be an apt subject for discussion by those of us actively installing PV systems subject to inspection by the AHJ. - Peter Peter T. Parrish, Ph.D., President California Solar Engineering, Inc. 820 Cynthia Ave., Los Angeles, CA 90065 CA Lic. 854779, NABCEP Cert. 031806-26 peter.parr...@calsolareng.com Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Bill Brooks Sent: Sunday, September 12, 2010 8:50 PM To: 'RE-wrenches' Cc: 'Christopher Flueckiger'; Tim Zgonena Subject: Re: [RE-wrenches] The Demise of Reason Peter, Be a little more careful in your choice of subjects. You are talking about the SunPower IFF clip. I have not heard this story, but I don't doubt it. There have been significant changes at UL and ETL, the two largest listers of PV modules, in the area of evaluating grounding equipment for PV modules. Unfortunately, the shift to overly conservative approaches to module grounding has caused huge problems with field installations. To make matters worse, installation manuals from PV modules have been required to get extremely specific about the only methods allowed to ground and bond the module frames. This conservative approach has shut the door on many methods that are far superior to the methods shown, because of the cost of evaluating these
[RE-wrenches] fewer wires, mo bettah?
Check this out. Four series strings of mods on a same plane roof feeding a larger Sunny Boy or Fronius inverter. Four #10 conductors for the ungrounded, fused (at the inverter) conductors. And for the grounded conductor, a single, common, larger conductor from those four strings. So instead of four pairs of wires, or eight total, I'm using just five (plus ground). Assuming that the larger grounded conductor is adequately sized taking into account conduit fill and temp derate for exposed conduit, does anyone see a problem in doing this? I've already been doing this for several years with no problems that I can tell. But it occurred to me whether different resistances between the ungrounded conductors and the grounded conductor might be an issue. Feedback appreciated. Thanks, marco ___ 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] deadly fall off of roof
A 30-year-old PV installer fell to his death back in April at job site in CA. He backed off of a roof accidentally and was not wearing any fall protection. I have the official report of the accident, but the multi-state full-service solar provider that has approximately 650 employees was not identified. Anyone know which company this was? Thanks, marco ___ 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] Pulse charge controller
I'm looking for an old (as in late 1990s vintage) PM-60 48V charge controller, the kind that Pulse/Connect Energy used in their PC 250 load center. Please to contact me off-list if you might have one in good working order lying around somewhere. Thanks, marco ___ 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] Tranformless inverter
Bill B. wrote the following: Ungrounding the array requires additional fusing and disconnects, but the most significant difference is that the module wiring and all external cable must be PV Wire/Cable. Therefore only modules with PV Wire/Cable can be used in these systems. You must confirm from the manufacturer that they have made the switch. Hopefully all manufacturers will be installing PV Wire/Cable soon so that this will not be a problem anymore. --My question: why is the standard USE-2 wire not acceptable any mo’? marco ___ 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] Tranformless inverter
Ah so….double-insulated is the key. I understand, Master. I will get my peeps on it. marco It has to do with the development of a “double-insulated” conductor needed for ungrounded systems. PV Wire is double-insulated while USE-2 is not tested as double insulated. It is analogous to double-insulated tools in the U.S. that do not require a ground wire. Bill. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Marco Mangelsdorf Sent: Friday, October 01, 2010 11:09 AM To: 'RE-wrenches' Subject: [RE-wrenches] Tranformless inverter Bill B. wrote the following: Ungrounding the array requires additional fusing and disconnects, but the most significant difference is that the module wiring and all external cable must be PV Wire/Cable. Therefore only modules with PV Wire/Cable can be used in these systems. You must confirm from the manufacturer that they have made the switch. Hopefully all manufacturers will be installing PV Wire/Cable soon so that this will not be a problem anymore. --My question: why is the standard USE-2 wire not acceptable any mo’? marco ___ 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] Xantrex/Schneider GT inverters
Anyone else having a hard time getting a hold of warranty replacements from Schneider for the Xantrex GT series inverters? What are they doing as far as warranty replacements? Waiting for bad ones to come in so that they can fix them and send them out again? I've got a customer who has been waiting for a while now with the we don't have any in stock right now and expect them in X weeks runaround. Makes you appreciate even more those other inverter manufacturers who get their warranty replacements out the door in days.. Thanks, marco ___ 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] insolation v. actual output
Could someone please provide me with that generally accepted equation when it comes to estimating AC output from a PV array versus the STC rating? That is, I'm looking for that equation which estimates the losses due to mod mismatch, soiling, wire losses, etc., etc. I've got someone who mistakenly expects their PV array to put out 90 or more percent of the STC rating. Thanks, marco ___ 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] insolation v. actual output
Yeah, but I'm looking for the equation as to how you get to that 75-80 percent figure. marco Marco I use 75% as a general rule, it seems to work out well. I've gotten upwards of 80% on certain enphase sanyo installations. Mike Nelson MD Electric Solar, Inc. Gualala, Ca. 95445 On Tue, Oct 12, 2010 at 6:17 PM, Marco Mangelsdorf ma...@pvthawaii.com wrote: Could someone please provide me with that generally accepted equation when it comes to estimating AC output from a PV array versus the STC rating? That is, I'm looking for that equation which estimates the losses due to mod mismatch, soiling, wire losses, etc., etc. I've got someone who mistakenly expects their PV array to put out 90 or more percent of the STC rating. Thanks, marco ___ 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] SolarWorld 245
SolarWorld is pushing hard its 245-watt module with the claim that it has won the Photon mag module competition in 2008 and 2009 (compared to several other manufacturers). I can send the spec sheet to anyone who wants it. It states on the front page: SolarWorld only delivers modules that have greater than or equal to the nameplate rated power. (emphasis added) This implies clearly to me a minus zero percent power tolerance. And then you look at the finer print on page 2 and see under Power Tolerance : +/- 3%* *Only modules with flash-tested or = Pmax are delivered. Linear warranty guarantees Year 1 module output to or + 97% or Pmax. I'm confused. Does this mod actually have a -0 PT or not? And on another note, are many of you finding it difficult to get an adequate supply of PV mods to meet your demands these days? SolarWorld, Schott, Sharp and Kyocera seem to be in short supply these days out in these here parts. Thanks, marco ___ 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] Enphase 210s
Anyone know who might have an available box or two of Enphase 210s @240V, please contact me off-list. (I don't care about the connector type.) Thanks, marco ___ 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] AC voltage in North America
I just don't understand it. Lots of people-from reporters to homeowners-consistently refer to the AC voltage in their homes as 110/220. Where does this come from? If North American utilities were putting out power at that voltage range, they would be in serious trouble. Anyone able to educate me on this matter? marco ___ 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] warranty liabilities
In places like California, and other states as well I'm sure, a PV integrator needs to provide a bumper-to-bumper system warranty of what? 10 years. I'd like to know if many, or any, of you all put aside any money to cover your future warranty liabilities. (I don't.) My belief is that we as an industry-at least as far as the large majority of us who are independent small companies-don't have a clue when it comes to calculating what our present and future exposure is as far as warranty liability issues. Having gone through the boom and bust of the solar thermal business in CA. in the late 1970s and early 1980s, there were tons and tons of orphan systems that had been supposedly covered by warranties by companies that were long gone. Makes we wonder how close or far we are these days to a similar situation. marco ___ 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] SW 4024
I'm looking for a used, and still working properly, Trace/Xantrex SW 4024 with 120V/60 hZ output. Please contact me off-list if you have a lead or two for me. Thanks, marco ___ 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] Enphase matching
Does anyone know if there's any reason why one couldn't do a single string using, say, six Enphase 190s with six Enphase 210s? The max in series for the 190 is 15 while it's 13 for the 210. I would think it would be OK to mix 'em. Thanks, marco ___ 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] feed-in imbalance
Now that SMA has come up with their new 8, 9 and 10 kW transformerless line of single-phase 120/208V inverters, it brings up the question once again about how practical and wise it is to have one or two of these inverters feed into a three-phase service. That is, is such an unbalanced feed much, if any, of a big deal? I spoke to my consulting E.E. about this and he said that the large majority of utility-provided transformers are so large these days that an unbalanced feed of, say, a 10 kW inverter that only has output power through L1 and L2 should not present a problem. Any other thoughts out there on this matter? Thanks, marco ___ 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] PV wire/double insulated
I'm starting to use the SMA SB transformerless 8-10 kW inverters. It appears that the new SMA 6-circuit combiner box is being included whenever I order one of these buggers (at least from my distributor). Does the double insulated PV wire have to be used all the way back to the inverter? Or can I get by with just using it to the combiner and then transition to the usual TWHN-2 wire? Thanks, marco ___ 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] double insulated PV wire
Could anyone please pass on the name of a manufacturer or two which produces this wire? Thanks, marco ___ 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] Pulse 250 power center
I'm looking for a Pulse 250 power center complete with PWM 60A charge controller, DC and AC switches. Anyone have one in good condition collecting dust in their garage or warehouse? Thanks, marco ___ 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] Sanyo mods
Would anyone be willing to tell me what they're paying for Sanyo mods these days? If so, please send me an email off-list. Thanks, marco ___ 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] OutBack v. Xantrex (SqD)
I don't do much off-grid no mo' and would appreciate some advice. I've got a client who's going to be purchasing a power panel with either an OutBack 3648 or Square D/Xantrex 4548. Also included would be the AC and DC switchgear integrated into the panel as well as either the OutBack or Xantrex MPPT charge controller. I welcome your recommendation and why. Thanks, marco ___ 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] Enphase and oversizing
To those of you installing Enphases. Other than their 210 only working with Sanyo and SunPower modules, the vast majority of other mods only work with the Enphase 190. Question: what's the max size module that you're comfortable using with the Enphase 190? In there here parts I'm seeing competitors pairing the Enphase 190 with modules in the 230+ watt range. Some are even pairing the 190 with the SolarWorld 245. Talk about wasting the customer's money.. This strikes me as a bad design that essentially has the homeowner throwing away some of his/her money on unused PV horsepower. Here in the tropics, where the edge-of-cloud effect can be seen on a regular basis, I see DC nameplate AND higher coming out on the AC side of my systems. I'm wondering where others are on this question of oversizing. Thanks, marco ___ 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] SunPower and SMA
Have any of you SunPower dealers used their modules with the fairly new SMA line of transformerless inverters (8, 9 and 10 kW @ 120/208 only)? I'm trying to get a compatibility answer directly from SunPower tech support, but am wondering if any of you have tried this combo. Thanks, marco ___ 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] Sunpower and SMA
I’ve used that line, Tom, with non-SunPower mods. Those three models definitely should NOT be used with SunPower modules due to the fact that there’s no grounded current-carrying DC conductor in the circuit. marco Have any of you SunPower dealers used their modules with the fairly new SMA line of transformerless inverters (8, 9 and 10 kW @ 120/208 only)? I’m trying to get a compatibility answer directly from SunPower tech support, but am wondering if any of you have tried this combo. Thanks, marco hello Marco, I am interested in same, have not contacted SMA tech about this, but see that they list the SunPower modules in their String Sizer for their TL inverters. Did you receive a response from them? thanks, tom Tom DeBates Habi-Tek 524 Summit St. Geneva,IL. 60134 630-262-8193 fax 630-262-1343 _ No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1204 / Virus Database: 1435/3433 - Release Date: 02/09/11 ___ 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] Solmetric SunEye upgrade?
Yes, very sensitive to nearby EMFs. And the bugger mistakes clouds for shading! marco Wrenches, I'm considering upgrading my old SunEye 100 to the model 210 this year. Even with the trade-in credit, the 210 costs more than the original SunEye did. I'm interested in hearing from those of you who have taken this step. Is it worth it? What are the most significant benefits to you? While we're on the subject of the SunEye, let's talk about some of the tricks to using this tool. I've found the built-in compass to be very sensitive to nearby metal, even nails under comp shingles. I find it more accurate to get the orientation of a site from Google maps and the azimuth angle finder on the Solmetric website: http://www1.solmetric.com/tools/RoofAzimTool.htm Then I update the azimuth angle in the software to the accurate measurement from Solmetric/Google, but it's still a tedious process to get the tool oriented as accurately as possible on site. That's part of why I'm interested in the 210, because its more rectangular shaped body would be a bit easier to orient on site with a protractor if the magnetic compass is having fits. Am I being too fussy with this? As I see it, a 10-degree azimuth error will throw off your shading analysis enough to be significant in certain scenarios, e.g. does the shade from that tall tree stop at 9am or 10am? Regards, -Hans ___ 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 _ No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1204 / Virus Database: 1435/3435 - Release Date: 02/10/11 ___ 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] Xantrex/Schneider recall
Is anyone getting reimbursed from Schneider for the replacement cost for the recalled GT series disaster line? We have yet to get response from them when we pose this question. And has anyone seen one of these buggers smoke or blow off the cover? Thanks, marco ___ 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] Sanyo problems
In the March issue of Photon magazine it's being reported that Sanyo's HiT modules may be suffering from MWs worth of failures. If you're unable to track down the article on-line, let me know and I can send you a PDF version. marco ___ 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] Sanyo problems
Esteemed colleagues, Regarding the Sanyo problems, I was mistaken. They're having problems with their HIP models. I'm seeking clarification from the author of the article who I know to see whether there have been any HIT problems as well. My apologies. marco ___ 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] John Wiles
I know that Michael Welch does not like when we Wrenches goes down the road of advocacy, but I wanted to put in a plug for John Wiles. The federal funding that has supported John's time and availability to the PV industry has been cut. I for one have relied on John as an invaluable resource on numerous occasions and have sent a brief email to his boss requesting that funding be restored. I respectfully request that you all consider doing the same. Thanks, marco ___ 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] John Wiles
The info originally posted to be able to contact John's boss and voice support for continued funding was incorrect. Below is the correct info. To those of you who feel inclined, please send an email to Andy Rosenthal. marco Andrew Rosenthal New Mexico State University 3705 Research Drive Las Cruces, NM 88003 arose...@nmsu.edu ___ 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] Fronius IG Plus
Does anyone know if Fronius is actually shipping their higher output IG Plus line? Do any distributors actually have some on their shelves? Thanks, marco Marco Mangelsdorf, Ph.D., President Electrical Contractor License C-26351 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile www.provisiontechnologies.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] 300A panel
I know that it's an oddball size, but I'm looking for a 300A indoor, surface-mounted 120/240V distribution panel. Anyone know of an available model and manufacturer out there? Thanks, marco Marco Mangelsdorf, Ph.D., President Electrical Contractor License C-26351 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile www.provisiontechnologies.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] SS Tek Crews
Peter, Would a #12 2 self-driller with a carbon steel shank and stainless steel hex head with attached washer do? I use the T-5 Scots screws that I get from Dynamic Fasteners. I use them to attach ProSolar al. mounting rails directly through roof metal and into a 14g or 16g z-bar purlin. (I use a 1/4-thick hypalon rubber pad to separate the rail from direct contact with the roof.) Marco ProVision Does anyone have a source for stainless steel, self tapping Tek screws? I could use some #10/3-4 and #10/1-1/2. If they have the little cap and neoprene washer that would be even better! - Peter Peter T. Parrish, President California Solar Engineering, Inc. 820 Cynthia Ave., Los Angeles, CA 90065 Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 CA Lic. 854779, NABCEP Cert. 031806-26 peter.parr...@calsolareng.com ___ 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] fed tax credit
The renewed and expanded ITC..does that still maintain the 20-year max limit to be able to claim that tax credit? Thanks, marco cid:image001.jpg@01C6D004.C865A8F0 Marco Mangelsdorf, Ph.D., President Electrical Contractor License C-26351 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provisiontechnologies.com image001.jpg___ 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] Mounting system for array on a metal roof
In Hawaii, we have a lot of steel-framed buildings with z-bar steel purlins supporting the metal roof. My attachment means of choice is using T-5 screws (#12 x 24 threads per inch). These buggers are self-drillers with a carbon steel shank and drill point and stainless steel hex head cap with rubber grommet. With a screw gun, you can actually zip these puppies through your Pro Solar rail, through the roof metal and through the z-bar purlin without the need to pre-drill. I use two screws per attachment point. I've had this method studied by licensed structural engineer and he has given me the thumbs up. Between the rail and the roof metal, I use a 2 square by 1/4 thick piece of Hypalon rubber to act as a dielectric between the al. rail and steel roof. I get the T-5 screws from Dynamic Fasteners and the Hypalon rubber strips from MacMaster-Carr. Marco ProVision --- You wrote: We did four 6.8 kW systems for a commercial development with standard metal building constructions. This building too had purlins 5' o.c. running parallel to the ridge. After looking into it, we determined that #14 Tek screws worked fine. The blow-mind was something around 1,400 pounds of pull-out strength in the steel we were using (it varies with the gauge of the purlin steel) per screw. (This is from memory and may be off.) We used a single Tek screw per L-foot, with a 2 square of sealing bitumen membrane under each foot, plus caulk after setting the screws. Test your red steel for workability. Try to drill holes in an accessible spot. See if this might work for you. Allan Sindelar ___ 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] SunPower Corp
I'd appreciate getting in contact with all SunPower Corp. dealers on the List. Please email me off-list. Thanks, marco cid:image001.jpg@01C6D004.C865A8F0 Marco Mangelsdorf, Ph.D., President Electrical Contractor License C-26351 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provisiontechnologies.com SPPD-logo image001.jpgimage002.jpg___ 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] Beam me up, Sunny!
Does anyone have any used, working SMA Sunny Beams that they'd be willing to sell or know of any anywhere? Thanks, marco Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image001.png___ 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] Fronius IG Plus
Any of you have experience with the new Fronius IG Plus inverters in the 8 kW to 12 kW range? Good, bad, beautiful, ugly? Thanks, marco Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile www.provision-solar.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] sales to-date
Compared to the first five months of last year, how would any of you who care to respond compare your year-to-date sales in 2009? Thanks, marco Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile www.provision-solar.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] sales to-date
Travis, Given the high cost for electricity here in Hawaii and both the federal and state tax credits available here, we've had a pretty solid 2009 so far and been at about the same revenue level as last year. We're a very small market out here compared to other states. And we're starting to see more areas of the grid where the utilities are saying that they have reached their comfort level as far as installed PV kWs, which means that no additional PV systems may be installed in those areas without expensive (e.g., in the $30K range) interconnect studies being performed. marco U...Marcowe're you going to share your numbers :)? A few months ago our gross sales were down nearly 70% compared to the same period the year before. But 2008 1st 2nd quarters we're some of the best we'd ever had the last 15 years. We've since landed some good sized jobs (for us anyway) and are now down less then 30%. We might catch up by the end of the year but I'm certainly not in a panic if we don't. I'm enjoying the lighter work load plus net profit is noticeable higher which I suppose is all that matters. Best, Travis Creswell Ozark Energy Services ___ 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] Chinese solar cells and modules and pricing
I'm seeing ~ $2.60/watt from a major Chinese manufacturer for a modest volume purchase. What are you all seeing as far as $/watt? marco Joel, Since late last year we've been stocking the Yingli 175w single-crystal modules. They seem dependable, haven't heard of any problems with them. Earlier in the year they were a low-cost choice for very cost-sensitive projects, but they were a 1st choice for very, very few dealers. Lately, with all PV prices tumbling, they've been even less attractive. I think the immediate future for Chinese modules will be developing country projects, and very large projects where price points matter more than a dependable track record or possible warranty service in a decade or two. Cheers, Doug Pratt DC Power Systems ___ 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] Solar Installers Education
I second a lot of what Peter says. And believe that it ain't gonna get nuttin' but worse over time as grid-tie PV becomes more mainstream. I think it's pretty much inevitable that a serious fire or two or serious injury or death or two due to incompetence and a poorly installed system is gonna whack us all over the head one day soon. In Hawaii, by law, there's no such thing as a legal owner-builder PV system. Only licensed electrical contractors (C-13) can legally obtain the necessary electrical permits in Hawaii's four counties to install PV systems. (We have a specialty Solar Power Systems license, but it's a joke and does not carry any mango juice with the state's electrical departments.) But that has not stopped a tsunami of sometimes well-intentioned, often-times grandiose thinking local and Mainland yahoos from leaping into the PV market peddling their _-brand cheep-cheap modules in this frantic race to the price and quality installation bottom. More education and training is desperately needed. I know that Ezra and our NABCEP amigos are doing their best, but I have to say that I've been shockingly disappointed with those eager people with their NABCEP entry level certification in hand hitting me up for a job. 'Kinda like offering a diploma to a kid graduating from kindergarten.. I also very much appreciate Bill Brooks, John Wiles, Keith Cronin, my friends at various IBEW chapters and others who are doing what they can to accelerate the process. But I have a queasy feeling that we're falling behind. In the 30+ years I've been in the field, nothing can take the place of experience in the field. (And I'm still learning each and every day and with each and every installation.) And I just don't see the numbers out there as far as enough trained and PV-competent people in the field. marco From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Peter Parrish Sent: Sunday, July 19, 2009 6:43 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Solar Installers Education Joel, As a friend, I have enjoyed your perspectives on our business, even though I usually don't agree with everything you say. I have never taken you to task in a public forum, but I can't let your latest post go without comment. There is a reason we call these guys DIYs. They have no experience and limited knowledge; in other words they are not professionals. And, by the way, what do you mean by so-called professional. I can't believe you tell some one who wants to get into the solar business to first put one on their home as a DIY. Could you in good conscience recommend someone who has never stepped foot on a roof in their lives to spend a week on one in 90-100 degree weather, in physical contact with modules and other components that are cooking at 145 degrees, and DC voltages approaching 600 V? Squinting at a layout/schematic the likes of which they have never seen before? Someone who hasn't used anything more than an 8 ft step ladder or doesn't know what a safety harness is? You also oversimplify: an appropriate apprenticeship for an installer is not the same as that for a design engineer or a salesperson. You don't need to have installed the PV system you own to appreciate how it works. I am personally aware of three DIY solar projects as well as a dozen or so contractor-installed systems that we have been called out to troubleshoot and fix. Even the best DIY project was worse than worst contractor-installed job. All, But here is my main point. I have a pretty good test of what is key in this PV business of ours. I get a call at least once a week from some one who wants me to help them with a PV installation. In addition to DIYs, I get these calls from B and C-10 contractors, facilities managers, apartment owners, and the like. They will take care of [fill in the part that they think they have covered] and they only need help with [fill in the part they need help on]. They usually have spent some time on the internet and have an idea of what modules to use and have teased a quote out of a manufacturer or distributor for 5-50 kW of PV; they usually have some un(der)employed electricians who can read a blueprint, bend and hang conduit and pull wire. What they don't know is how to (1) Specify an appropriately sized system (2) Design a system (panel orientation, shading, structural calcs, string sizing, ampacity calcs, over current protection, grounding), (3) Specify all the speciality BoS components or where to buy them. (4) Put together a permit package (that will pass ARB, Planning, Safety and Fire department muster) (5) Perform the mechanical side of the installation (read roof penetrations) They usually know about the 30% ITC (or grant) but they just need a little help with the rebate application, which usually means they have some un(der) employed back office
[RE-wrenches] fed grant
In order to get the 30 percent federal grant rather than the 30 percent ITC, is there any requirement that the equipment used be American made? Thanks, marco provision_highres_solar_logo2 with C-26351 Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image001.jpg___ 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] module pricing
I'd like to do an unscientific poll and welcome any participants. Please to fill in the blanks. These two manufacturers are currently selling the highest priced PV modules at present (in terms of $/watt): _ and . I'll go first. SunPower and Sanyo. While there's been this pretty much manic race to the bottom as far as module pricing, I'm curious as to which manus are trying to make their stand on quality, high efficiency, power tolerance and premium pricing for an ostensible premium product. Thanks, marco provision_highres_solar_logo2 with C-26351 Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image003.jpg___ 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] Pulse combiner box
I'm looking for some of those old-style fuseholders for the Pulse brand combiner box. I could use a half dozen of them. Anyone have any out there that they would be willing to sell? Thanks, marco provision_highres_solar_logo2_final Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image001.jpg___ 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] Canadian Solar modules
Canadian Solar modules are most definitely made in China. I guess they couldn't get away with branding American Solar and probably didn't want Mexican Solar. Heck, everyone likes Canadians. The Strong frame is not very rigid and flexes too much like most Chinese modules. - Original Message - From: Bob-O Schultze mailto:bo...@electronconnection.com To: RE-wrenches mailto:re-wrenches@lists.re-wrenches.org Sent: Thursday, October 15, 2009 7:48 AM Subject: Re: [RE-wrenches] Canadian Solar modules Holt, No experience with them, but I believe they are made in China. The whole misnomer of Canadian Solar is enough to turn me off to them. Bob-O On Oct 15, 2009, at 7:31 AM, hol...@sbcglobal.net hol...@sbcglobal.net wrote: Greatly valuing the opinions of all who participate on this list, I was wondering if anyone has had experience with Canadian Solar modules. Am bidding a 42kw system for local community college, so budgets are tight and this line of modules fits the budgetary profile. Sharing pros or cons would be greatly appreciated. ___ 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] REC modules
And REC Solar had HUGE recall earlier this year to the tune of tens of millions of . marco No, IMHO. A polycrystalline module is never going to be top shelf. First Quality would be Sunpower, Solarworld, Sanyo, Check the new CEC module ratings. Apparently most modules were further derated. A few stayed the same or went up slightly. R. Walters r...@solarray.com Solar Engineer On Oct 26, 2009, at 5:46 PM, Drake Chamberlin wrote: Hello Wrenches, I am considering using REC modules on a project, and have never used them. Are these first quality modules? Thank you, Drake Chamberlin Athens Electric OH License 44810 CO License 3773 NABCEP TM Certified PV Installer Office - 740-448-7328 Mobile - 740-856-9648 ___ 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 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.423 / Virus Database: 270.14.32/2460 - Release Date: 10/26/09 08:10:00 ___ 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] Enphase track record
Can anyone think of a more brutal environment for a piece of electronic equipment than under a solar module which day in and day out experiences the elements and temperatures of 130+ plus F? Despite any so-called accelerated life-cycle testing and estimated mean time to failure probabilities, nothing takes the place of actual time cooking under solar arrays. Having seen my fair share of controller and inverter manufacturers come and go out of business in 30+ years in the RE field, I'll be watching with great interest the great Enphase experiment unfold. And ever heard of the word recall? Swapping a central inverter or two is one thing. Imagine doing it with the X number of microinverters you installed six months or two years ago... But hey, other than my Eeyore-sounding words above, aren't Enphase inverters so cool with all that they can do? marco in Hawaii A while back there was a discussion about the reliability of Enphase inverters. As I understand, they have been selling like hot cakes, so a lot must be installed. Some sort of track record must be emerging. Has the promised reliability of these inverters been met? Can they be connected to a rail, under a large array without worry that the unit will need to be dug out and replaced? Should the inverters be located in an attic or other accessible location. Thanks, Drake Chamberlin Athens Electric OH License 44810 CO License 3773 NABCEP TM Certified PV Installer Office - 740-448-7328 Mobile - 740-856-9648 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.425 / Virus Database: 270.14.52/2485 - Release Date: 11/06/09 19:39:00 ___ 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] peformance matters
The common metric for many consumers when considering a PV system purchase is the $/watt cost of the installed system. This misleading metric allows low-priced bottom feeders (those licensed and unlicensed contractors working out of their garage or storage spaces) to clobber those of us who pay all of the taxes and insurances and infrastructure costs to run a brick-and-mortar operation with employees, etc. But when it comes down it, what really matters to the consumer is not the $/watt installed cost but the kWhs produced by the system over time. For what good is a cheap PV system if its output is poor? Our focus as PV integrators should instead be to emphasize the superior performance of our offered products, as in kWhs produced. To that end, where can we go for objective performance data comparing brands X, Y and Z in monitored side-by-side testing over time? Ideally if we had multiple sites worldwide, with multiple climate conditions, we would be able to see whether a 2 kW array of brand X put out more power than brand Y. Can anyone point me to readily available data comparing the performance of the major mod manufacturers in side-by-side testing? Gracias amigas y amigos, Marco ProVision 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: [RE-wrenches] performance matters
Hence the need to be able to present objective, 3rd party-collected performance data demonstrably showing the superior performance of one brand over another. marco Marco: Good point, but how does a consumer quantify the expected long term harvest and reliability of a solar electric system? Smooth talking sales people will assure customers that the lower priced system is of equal value as the name brand system offered by an established installer. William Miller PS: Our best customers are working or retired trades people or engineers. They know the difference. Wm At 09:50 AM 11/10/2009, you wrote: But when it comes down it, what really matters to the consumer is not the $/watt installed cost but the kWhs produced by the system over time. For what good is a cheap PV system if its output is poor? No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.425 / Virus Database: 270.14.58/2493 - Release Date: 11/09/09 19:40:00 ___ 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] Fronius IG Plus line
I have yet to install a Fronius IG Plus inverter. Looking through the manual I'm trying to determine whether each inverter in the line, between 3 and 12 kW, puts out three-phase power across all three poles, L1, L2 and L3 or whether all or some of these models put out power across just one or two poles like the SMA Sunny Boys. I'd appreciate any education on this. Thanks, marco provision_highres_solar_logo2 with C-26351 Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image001.jpg___ 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] Andalay and Lowes
Mr. Cinnamon's company, Akeena Solar, has accumulated over $48 million in losses from 2006 through Q3 2009, according to public documents since they're a publicly-traded company (http://ir.akeena.com/annuals.cfm). He now apparently believes that he can turn a profit by commodifying PV through his Andalay product line and having Joe Blow homeowner pick up an Andalay package or two or ten at Lowes, essentially bypassing licensed solar or electrical contractors and slap those puppies on the roof himself. As long, of course, he's safety conscious about getting up and down the ladder. I fully agree with brother Jeff Wolfe's observation: You put solar panels on your roof without a permit, bad things happen to you. One thing is virtually certain: come Monday morning we're going to be getting calls from Joe B. asking for help to figure out what he did wrong or that he got a nasty zap and doesn't want to get back on that roof... marco This article in the Cape Cod paper floored me, especially with this quote It's really not a big deal, said CEO Barry Cinnamon. The most dangerous thing is learning about ladder safety. http://www.capecodonline.com/apps/pbcs.dll/article?AID=/20091219/NEWS11/9121 09992 wlmailhtml:%7b07912ECD-9606-422B-9FE8-4061F9615E3F%7dmid://0054/!x-usc: http://www.capecodonline.com/apps/pbcs.dll/article?AID=/20091219/NEWS11/9121 09992 My gut says this will spawn a whole host of horror story installations. Tom ___ 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] Enphase 215
Anyone know what the max rated output of the his new bugger will be? For the Enphase M190 it's 199 watts and 219 watts for the M210 according to our inphase Enphase friends. I'm wondering if the new M215 will also have some higher than nameplate max continuous rating. Thanks, marco ___ 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] Enphase 215-2
Anyone make sense out of this from the M215 spec sheet? This model would seem to be able to accommodate a wider range of 200 series mods out there as far as input DC voltage, which is good. And yet how will the 215 perform with those modules which have a MPPT voltage from 37-45 since that range is beyond the state peak power tracking range? Thanks, marco image001.png___ 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] big combiner box
I'm looking for a 30-circuit combiner in a NEMA4 non-metallic enclosure. Any suggestions? Thanks, marco ___ 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] Tigo to go?
What's the feedback on these Tigo buggers? I'm not talking about sites where shading is an issue, but a nice big commercial roof with no shading. Specifically, I'm talking about a 400-module system feeding into a single PV Powered 100 kW inverter. Anyone have an opinion whether spending another $15,000 on gobs of little tiny Tigos would be worth it as far as increased kWhs production? Obviously it's in Tigo's interest to say emphatically yes. But I is wonderin'. marco ___ 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] Tigo to go?
Nowhere close. I'm not a believer in using micro inverters for large commercial projects. Plus, I'm pushed to the limit on this particular project to keep the costs down in order to satisfy the PPA investors. Off-line I'll tell you what I'm charging. I never thought I could/would go that low. But our industry (and I've been in the RE biz since the late 1970s) has been taken over by bean counters, financiers/bankers and lawyers. (Sorry, Michael..) marco Marco, I understand that the cost of electricity in Hawaii is pretty high so cost can be justified. But don't forget the cost of bolting up each optimizer. And the cost of doubling the number of cable connection, now and possibly in the future. Complexity increase cost in the long run? How closely have you looked at this? It looks like the Tigo is already about 1/4 the cost of an Enphase. So how close are you to moving from an optimizer / inverter combination to a microinverter? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Marco Mangelsdorf Sent: Wednesday, June 08, 2011 7:59 PM To: 'RE-wrenches' Subject: [RE-wrenches] Tigo to go? What's the feedback on these Tigo buggers? I'm not talking about sites where shading is an issue, but a nice big commercial roof with no shading. Specifically, I'm talking about a 400-module system feeding into a single PV Powered 100 kW inverter. Anyone have an opinion whether spending another $15,000 on gobs of little tiny Tigos would be worth it as far as increased kWhs production? Obviously it's in Tigo's interest to say emphatically yes. But I is wonderin'. marco ___ 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] commercial system monitoring
I'm looking for a bare-bones, cheap (hah!) web-based monitoring system for three-phase systems using either Satcon or PV Powered inverters. I'm having a hard time finding any package (it doesn't have to be bloomin' revenue-grade) under $3,000. Anyone know of anything reputable and lower cost out there? Thanks, marco ___ 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] Ballpark Cost/Watt
Yes, you're in the ballpark. marco Hello Wrenches, My employer has the inside track on a 1MW install on .5/12 standing seam metal roofs (two separate roofs). This is by far larger than anything we've designed so I am looking for a ballpark cost/watt. I'm at around $4/watt. I realize there are lots of variables and I am looking for help on this but just wondering if I am in the ballpark? Thank you. Larry Liesner Design and Installations Elektron Solar, LLC 16 Ketchum St. 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
[RE-wrenches] Pulse PC 500
Anyone have the manual or spec sheet in an electronic format that they could send me, please? Thanks, marco provision_highres_solar_logo2 with C-26351 Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image001.jpgimage002.png___ 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] SMA design tools
I'm s bummed out that SMA has removed their handy and easy to use string sizing tool from their website and replaced it with a cumbersome monster of a design program. (Yes, at my age I do struggle with having to learn yet another bloomin' program.) Does anyone know if there's some magic way to be able to find/use their old string sizing program somewhere? Or has it been banished to the deep, dark dungeon of SMA corporate HQ in Germany forever? Thanks, marco ___ 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] shatterproof PV
I'm looking to install a 10-20 kW system on a roof that's going to be getting falling foul balls from a nearby baseball field. The roof is not appropriate for any of the Uni-Solar peel-n-stick products. Any recommendations for anything else out there that does not have a glass glazing? Thanks, marco provision_highres_solar_logo2 with C-26351 Marco Mangelsdorf, President 69 Railroad Avenue, A-7 Hilo, Hawai'i 96720 (808) 969-3281, 934-7462 facsimile http://www.provisiontechnologies.com www.provision-solar.com image001.jpgimage002.png___ 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] Uni-Solar
OK, I guess that it had to happen someday. I call Uni-Solar in Michigan for some basic product info only to be told that their sales dept. does not take any phone calls, that any inquiries have to be done on-line. Being in the customer service myself, like pretty much all of us, it is beyond belief that any company would take this we refuse to talk to you directly approach. Brilliant move, corporate people at Uni-Solar. Refuse to speak to possible customers. OK, rant off. I'm looking for 10-20 kW worth of the Uni-Solar 64-watt framed a-Si modules. From what I can tell, Uni-Solar doesn't make them anymore. Anyone know whether there are any to be had somewhere? I need a non-glass, framed product. Thanks, marco ___ 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] Enphase 215
According to my discussions with Enphase on this subject, the M215 can actually put out 225 watts continuous. Marv? Please confirm. marco The inverter should be current-limited on its output. The other Enphases have a higher output power than rated (199 @ 190, 219 @ 210, if memory serves from earlier list posts), so this may have a similar window. 215Wac max inverter output / 240V = 0.896 0.896 x 17 = 15.23A 15.23A x 1.25 20A so it's OK. As long as the inverter output is actually 225W or less, you can fit 17 on a 20A circuit. As before, you'd have the inverter limiting output when the high-power modules are actually performing near or above STC. There will certainly be times during the year where the inverters are maxed out but those times will be a small portion. Enphase had some documentation on their site about this where they claimed it wasn't worth worrying about, but it's a site-specific question that the installer should answer. On 2011/8/24 0:20, Keith Cronin wrote: Hey gang With the 215's on the scene and the tech literature on their website, they state you can put up to 17 modules on a string. Locally, I see folks throwing on 17-235 watt modules. Back of the napkin- 235 watts/240 volts = .97 amps. 17 x .97 = 16.49 amps on the 20 amp circuit. Pushing the envelop of the circuit, per NEC and in situations of lower voltage, could tip the current higher, per module it seems or is the unit current limiting? Wouldn't it seem plausible to ebb on 16 vs the 17? The 15 amp circuit to 20 amp circuit also is a change for the industry at large, as well as a few other changes. As Solarworld is rolling out their 250 watt and others in the same zone, it seems there should/could be some caveats on the enphase literature to reflect this. Thoughts, comments? Keith ___ 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] roof types
A bit off of the solar subject. Any recommendations for a new roof that would be an acceptable means for collecting drinking water? Thanks, marco ___ 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] quite the conundrum
In 2008, about 200 Net Energy Metered systems went in on this Big Island of Hawaii, where I live. About 400 in 2009 and over 800 in 2010. The same increase in adoption rates took place across the Aloha State. I think that the next two years or so will bring a stop to this kind of growth most likely because of the fed grant in lieu of tax credits very likely going away come 1-1-2012 and a likely change to the HI. state tax credits as well after this next legislative session as well as the continued progression of our small island grids becoming more closed to PV due to grid saturation issues. Be that as it may, until there's a contraction in the PV biz in our Aloha State (not a question of if but when), we're going to continue to be in an insanely competitive sales environment. My commercial sales these past 9 months have been kinda light and I'm bothered by that. Our standard approach is to always offer the highest efficiency mods from Brand X. But we've been losing sales to others who are undercutting us by as much as 30 or more percent. No surprise, really, since these mods are so much more than pretty much the rest of the market, aside from Brand Y with its HIP and HIT lines. I've resisted going all in or even mostly in as far as getting container loads of good quality Chinese mods as we've been hyping ourselves as providers of the highest efficiency production mods on the planet along with our solid econoline of U.S.-made mods with a minus zero PT and flash test data for every mod. But if you hit 'em with Brand X and they're not really educated on Brand X nor asking for the best, any other quotes that they're considering from others will make the Brand X quote look way high. And at that time you can usually kiss the sale good-bye. So I'm considering a substantial change in our approach to selling PV. Go mostly Chinese, go low price to keep up with the competition, offer quotes using Chinese mods as a standard matter of course and perhaps offer Brand X on a more limited basis. It just seems to me that the commoditization of the PV biz these days has most consumers concluding that price is the most important factor whether the mods come from China, the U.S. or Timbuktu. Let the fireworks begin. marco ___ 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] ARCO Solar and Carrizo Plain
Us old-timers remember the dismemberment of the then big ARCO Solar grid-tie project down in So. CAL. In the 1980s and the parting out of that project in dribs and drabs for years. I was wondering recently with all these ever so big and getting bigger grid-tie projects sprouting like mushrooms across the developed world: why did ARCO Solar and the utility (PGE?) scrap the whole thing after a relatively short period of time? Causes me to wonder about the fate of so many of the mammoth projects now going in as far as what's going to happen when the owner-investors likely bail, having made their handsome ROIs, after the tax credits and MACRS depreciation plays out. Thanks, marco ___ 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] under performing Enphase inverters
For the first time, several weeks ago, after 40-50 Enphase installs, we've come across at least two M210s that we putting out consistently lower outputs than their immediate neighbors. We replaced the two mods first, which made no difference. Then, in consultation with Enphase, replaced the M210s. After replacing them, the power output was as it should be. Now I've got another suspect system with several underperforming mods out of (36). Has anyone else had this experience? Thanks, marco ___ 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] SMA micro
Anyone been able to lay their hands on a preliminary spec sheet for the new SMA micro inverter? Also, anyone install the SolarBridge Pantheon micro yet? Feedback? Thanks, marco ___ 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] Sharp triangles
Does Sharp still make those quasi-triangular mods? Thanks, marco ___ 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
