larger size panels and Enphase

bobdog

I'm confused. As I see, the Enphase M215 puts out 215 watts of power. (I believe I read that correctly). If that is the case, why do folks buy 240 watt solar panels or anything larger than 215 watts?

BB.

Re: larger size panels and Enphase

Roughly, on an average basis, GT solar will output around 0.77 to 0.82 of panel rated power (cold climates, panels will output more).

So, for a cost effective system, you could put on a 215 watt GT inverter, up to:

• 215 w / 0.77 derating = 279 Watt Panel

You will lose some power at noon, cool days--but not that much usually on average (hot summer afternoons really reduce Vmp, dusty panels, etc.).

-Bill

bobdog

Re: larger size panels and Enphase

Now that makes sense. Forgot about derating factor. thanks Bill.