Decreased energy production

dhill Solar Expert Posts: 47
Does heat decrease the production of energy in solar panels?


  • halfcrazy
    halfcrazy Solar Expert Posts: 720 ✭✭✭
    Re: Decreased energy production

    short answer is yes someone will chime in with the exact amount though. it is more then you would think for though.
  • crewzer
    crewzer Registered Users, Solar Expert Posts: 1,832 ✭✭✭✭
    Re: Decreased energy production

    Yes. Check the "temperature coefficient of power" spec for your PV modules. A typical spec for polycrystalline modules is -0.5% per degree C. Translation: For every degree C of PV cell temp above 25 C, expect a ~0.5% drop in output power. Cell temp can run ~30 C above ambient in full "Sun", so a 12% to 15% drop in available power is not uncommon.

    Jim / crewzer