larger size panels and Enphase

bobdogbobdog Solar Expert Posts: 192 ✭✭
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?

Comments

  • BB.BB. Super Moderators, Administrators Posts: 32,612 admin
    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
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • bobdogbobdog Solar Expert Posts: 192 ✭✭
    Re: larger size panels and Enphase

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