Why dont you use the m250 anyway as the 250's so far are more reliable then the 215 have been. A little off topic i know. On Aug 25, 2014 1:41 PM, "Jason Szumlanski" <ja...@fafcosolar.com> wrote:
> I had a tough customer recently that grilled me on how we can put a 270W > solar module on a 215W inverter. Fortunately, Enphase has a wonderful white > paper on the subject. However, it got me thinking... Enphase has > demonstrated that higher output panels in many climates (hot SW Florida > included) can benefit from modules that far exceed the inverter rating, and > even exceed the inverter's "recommended input" rating. Enphase has shown > that 270W+ modules can show energy harvest on the M215 where it makes sense > to "oversize" the module. > > I also received a similar query from a rather uninformed plan reviewer in > an area AHJ along similar lines. Fortunately I was within the "recommended > input" rating on the spec sheet of 270W with a 265W module, but I wonder > what would happen if I had paired the M215 with a 280W module on my plans, > which are becoming readily available now in 60 cell modules with 300W > modules on the near horizon. I'm pretty sure my plan would have been kicked > back for exceeding the manufacturer's recommendation. > > My question, which applies to string inverters and microinverters, is how > much is too much, what would happen if you paired an array that far > exceeded the rating, and how do inverter manufacturers determine the > recommended and/or maximum rating of the connected module or array? Also, > why do some manufacturers have a simple recommendation while others have a > "maximum" rating? > > > Jason Szumlanski > > Fafco Solar > > > _______________________________________________ > 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 > > >
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