I can only answer for the cold weather portion. I live in northern MN, my hometown has a record cold temp of -60F (no wind chill). We see -40F every year. I usually stay away from outside mounting, although we have installed some Enphase and they have seen colder than their rating with no problems. I have one PV Powered 2000W inverter mounted outside in international Falls, it's cold rating is -12F or something close to that. It has seen -36F and keep working.
Jesse Sent from my iPhone On Dec 14, 2012, at 1:03 PM, Hilton Dier <hiltond...@gmail.com> wrote: > 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 > _______________________________________________ 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
