Quote:
Originally Posted by red-beard
They dont stop working. They just produce less power as time goes by. Most lose about 1% per year. Top tier lose about 1/2% per year.
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To be honest, i haven't noticed much reduction since 2011 when I put mine up on the garage.. My average daily production seems pretty much the same as what it was then.
I think the theoretical 1% loss is masked by the inverter losses, and heat losses on really hot days... So it probably takes a long time before you really start to notice anything.