Bob, So he is grid-tied. But his household loads are all 100 Vdc? I wonder how he charges his battery bank If it is PV with a charge controller (or wind), then I think he can export to the grid and get both a rebate from his utility and a Federal Tax credit. I assume that he is not interested in powering the 20 HP motor for his sawmill! If he is charging his batteries some other way (small hydro) I dont know about the incentives.
But it looks like he is staring at a fully charged battery bank with generation to spare and is thinking Why not sell this juice to my utility company? Fair question. I have no direct experience with the SB700, but it has been around for eons, and presumably is rock solid and can MPPT at 100 V all day long. The Fronius inverters only work down to 150 V. The Exeltech inverters that I am familiar with work down to 200 V. There must be lower voltage, grid tied inverters out there but the battery backup versions assume 24 Vdc or 48 Vdc battery banks. So, with the exception of the SB700, there seems to be a gap between 48 V (maybe 60 Vdc) and 150 Vdc. - 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 ________________________________________ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of bob ellison Sent: Tuesday, November 16, 2010 5:23 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] 120 volt grid tie inverter Peter, The fellow is living with a 120 volt DC battery bank, using it to power his place and a 20 HP motor on his sawmill. He wants to reduce the electric bill further than he already has. So we are looking for an inverter that will take 120 volt DC nominal from the panels / batteries and send it to the grid. I am supposed to meet him tomorrow and hope to have more info afterwards. Thanks, Bob Ellison From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Peter Parrish Sent: Monday, November 15, 2010 8:38 PM To: glenn.b...@glbcc.com; 'RE-wrenches' Subject: Re: [RE-wrenches] 120 volt grid tie inverter Bob, Do you mean they have a nominal 120 Vdc input? Or do you mean that they want a 120 Vac (RMS) output? If the former, what output voltage do you want? If the latter, what is their nominal dc input voltage (better yet the range of DC input voltages over a range of typical temperatures and irradiance values)? - 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 Glenn Burt Sent: Monday, November 15, 2010 5:29 PM To: 'RE-wrenches' Subject: Re: [RE-wrenches] 120 volt grid tie inverter I think there is still an SMA 700W inverter available that uses 120VAC. -Glenn -----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Bob Ellison Sent: Monday, November 15, 2010 11:14 AM To: RE-wrenches Subject: [RE-wrenches] 120 volt grid tie inverter I have a customer who wants to grid tie a 120 volt dc system Does anyone know of an inverter that can do this? Thanks Bob ellison > _______________________________________________ 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 ________________________________________ No virus found in this message. 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