[randombit]

Solar panels don't depreciate in the same way as most silicon. 20 years later, panels will still be producing power just fine, albeit with some degradation.

Source: my house has 23 year old solar panels, my garage has 10 year old panels, they all still produce plenty of electricity.

There are plenty of reasons to avoid dealing with these companies, but this isn't one of them.

[antisthenes]

Out of curiosity, how much do your 23 year old solar panels produce compared to when they were new? 90%? 85%?