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 my
Turun@feddit.de 6 months ago
The solar panels I just bought have a manufacturer warranty for 87% power output after 30 years.
FiniteBanjo@lemmy.today 6 months ago
That’s much more realistic, I like that.