Since SunPower began using their Maxxeon cells several years ago, the grounded conductor—when there is one—is indeed negative. (No grounded conductor while using TL inverters.)
marco From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirk Herander Sent: Tuesday, January 19, 2016 5:55 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Availability of Powerwall Batteries SE, both inverter and optimizers are now compatible with Sunpower? Someone also told me Sunpower now makes a negatively grounded panel. From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Marco Mangelsdorf Sent: Monday, January 18, 2016 10:27 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Availability of Powerwall Batteries SE and SunPower are compatible. SunPower has recently started providing SE through their residential dealer channel. From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirk Herander Sent: Monday, January 18, 2016 4:44 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Availability of Powerwall Batteries I’m not sure the Powerwall actually exists yet. Our utility, Green mountain Power, has announced a pilot program using them in selected residential applications, but they have no product at this point to my knowledge. And I don’t think SE optimizers are compatible with Sunpower, if not for other reasons using a SMA inverter. Aren’t they unique to the SE inverter only? Kirk Herander Owner|Principal, VT Solar, LLC Celebrating our 25th Anniversary 1991-2016 www.vermontsolarnow.com dba Vermont Solar Engineering NABCEPTM 2003 Inaugural Certificant VT RE Incentive Program Partner 802.863.1202 From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Peter Parrish Sent: Sunday, January 17, 2016 7:44 PM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Availability of Powerwall Batteries I know a fair amount about Sonnen. I thought their main thrust was 480 V/3P & LiFePO4 batteries, and systems for peak demand clipping. Do they have a “residential” offering? I am looking at 240/120 V split phase. If I can TOU load shifting and battery back-up, that will do it for this customer. - Peter Peter T. Parrish, Ph.D. President, SolarGnosis 1107 Fair Oaks Ave. Suite 351 South Pasadena, CA 91030 (323) 839-6108 peter...@pobox.com From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dan Fink Sent: Sunday, January 17, 2016 11:38 AM To: RE-wrenches Subject: Re: [RE-wrenches] Availability of Powerwall Batteries Have you looked into SonnenBatterie? To which a number of Tesla execs have recently bailed out to work for? As always with all these new hypey Lithium storage systems, their presentations had everything except the information that real Wrenches actually need. But I was able to glean the info that Sonnenbatterie works with existing 48VDC nominal equipment and input, and 120/240VAC inputs also. Following all the info coming out, but i'd rather let someone else be the guinea pig. And, of course, big $$$$ per kWh of storage. Dan Fink Adjunct Professor, Ecotech Institute IREC Certified Instructor™ for: ~ PV Installation Professional ~ Small Wind Installer Executive Director, Buckville Energy NABCEP Accredited Continuing Education Providers™ <tel:970.672.4342> 970.672.4342 On Sun, Jan 17, 2016 at 12:06 PM, Peter Parrish <peter.parr...@calsolareng.com> wrote: I have a residential client who wants a grid tied PV system with battery backup. The client wants everything to be top of the line: Sunpower modules. Tesla Powerwall batteries. Unfortunately, I have been spending time recently researching "smart energy storage" for commercial applications focusing on peak demand shaving. These are 480 V 3-phase systems with 30 kW inverters and 48+ kWh Lithium technology batteries. I think I am beginning to understand the performance trade-offs and how these systems can complement PV to reduce demand charges as well as usage charges. My problem, is that I have not spent as much time researching the newer residential GTBB offerings. I have studied the Juicebox offering – Schneider XW5548 plus NMC Lithium batteries -- but that’s about it. I don’t know the default vendor for the NMC batteries and if not Powerwall, could Powerwall be a replacement? Otherwise, does anyone know how to access the Powerwall offerings? Also has anyone had success getting a rebate in CA through the SGIP/AES program? I know to qualify for SGIP one needs to demonstrate load shifting as opposed to (or in addition to BB). There seems to be an offering from Solaredge (Storedge), but it is not clear their optimizers work with the 96 cell Sunpower X21-345, for example. I am convinced that smart storage will become more important over time, and I would like to use this customer to “get smart”, and prepare for future business of this sort. Any practical knowledge would be greatly appreciated. I am happy to exchange information on commercial demand management offerings. - Peter Peter T. Parrish, Ph.D. President, SolarGnosis 1107 Fair Oaks Ave., Ste. 351 South Pasadena, CA 91030 (323) 839-6108 <tel:%28323%29%20839-6108> NABCEP Certified PV Installation Professional #031806-26 peter.parr...@solargnosis.com _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org _____ No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.7357 / Virus Database: 4489/11401 - Release Date: 01/14/16 _____ No virus found in this message. 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