Poly panel turns black and loses power
Anyone ever see this before?
that string of three (230W Poly panels - Chinese Ningo Quixin) produced half the power of the other 3. When I looked at the cells closely, there is a dark hue over most of them, with loss of the usual polycrystalline variance.
Could this be moisture ingress as a result of a bad seal? the thing is, these panels were in storage until today.
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