Hello Wrenches, I have a customer with questions. We had recommended a standard SMA 5kW inverter for an outdoor installation.
He is an engineer, so he was looking at the specs for the transformer-less version as well as the one with a transformer. He noted that the rated max efficiency of the non-transformer unit is 3% higher, 98.5%. He also asked about the cold weather -40C option. He lives in central Vermont, which does get below the regular -13C rating. (Although less often lately) Any opinions on the relative durability or efficiency of the two versions? Any opinions from cold region installers about the merits of the -40C option? Thanks, Hilton Dier Hilton Dier III Renewable Energy Design Solar Gain, LLC Missisquoi River Hydro LLC _______________________________________________ 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
