• Turun@feddit.de
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      7 months ago

      The solar panels I just bought have a manufacturer warranty for 87% power output after 30 years.

    • Heliumfart
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      7 months ago

      My dad is still using the first 60w panel he bought in 1986, for 600$. Obvs added many more to his system, and who knows how efficient it is, but it does work, haven’t put a ampmeter on it though.

      Mind you it was made in the USA, probably better materials than nowadays.

      • Turun@feddit.de
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        7 months ago

        The mass market has really pushed solar panel production. I expect the material quality even of the cheap china panels to be better than what anyone was able to produce almost 40 years ago. That’s a long time to understand degradation processes and develop countermeasures.