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Lars,
With the old Trace inverters? Were they 4.01 firmware or 4.10/4.30? Did you use the GTI? How did you AC couple them - which input/output terminals? And what was the rationale in an off grid scenario - distance to sun in a shady forest? I didn't know this was possible. Thanks, Allan
Allan Sindelar
On 5/28/2013 11:53 AM, lars Ortegren wrote:al...@positiveenergysolar.com NABCEP Certified Photovoltaic Installer NABCEP Certified Technical Sales Professional New Mexico EE98J Journeyman Electrician Founder and Chief Technology Officer Positive Energy, Inc. 3209 Richards Lane (note new address) Santa Fe, New Mexico 87507 505 424-1112 www.positiveenergysolar.com We have done a number of off grid AC coupling projects over the last eight years. We have found they are successful with anything that comes close to a true sign wave, including some of the old Trace inverters. I would be careful to not come too close to the wattage of the source inverter, and keep in mind that your battery charging is only one stage (bulk), and might not be the best choice without another charging source (i.e. the grid, or a semi regular generator). I can't say it makes a lot of sense, but when we have tested grid tied inverters and charge controllers side by side, the GT inverters produce significantly more than any CC's on the market.. Any more, I think that it is a better design to have the larger array tied to a GT inverter, and a small array tied to a charge controller for absorb and float charging...Just sayin.Lars Ortegren Director of Operations California Solar Electric Company 10141 Evening Star Drive, Suite 6 Grass Valley, CA 95945 http://www.californiasolarco.com/ Phone : (530)274-3671 Fax: (530)274-7518 California C-10 Electical Contractor #779624 NABCEP Certified PV Installer # 091110-89 Certified NABCEP Continuing Education Provider _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org |
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