Solar modules deployed in France in 1992 still provide 75.9% of output power

> Solar modules deployed in France in 1992 still provide 75.9% of output power

These are before the "lead free" introduction. I wonder what is the useful life of a today's built solar module.

Yes. But have those modules actually produced anything? I bought 6 watt panel from West Marine in 1992 and it was 80 dollars. According to my expert calculation with full sunshine everyday and kWh being 10 cents, it has not been profitable yet. It has produced 38 dollares in 22 years (0.006*0.10*360*8*22).

> This result exceeds the performance promised by the manufacturers

If only this could be said of more companies products.

They’re sure these aren’t just the ones not deinstalled for failing before now?

We have wind- and watermills which still provide 100% of output 400 years later.