My solar is making about 2/3rds of the power I've consumed. Money-wise it's a horrible investment -- it'll take many years for it to pay for itself and I make much more investing in equity funds. Nor is it a replacement for fossil fuels -- nothing is. But it gives me the peace of mind that at least a healthy portion of my energy costs are pre-paid and can't be messed up by Dims trying to make everybody repent from their cow farting sins.
For a single residence it doesn't make sense to replace old ones.
Wind powered large ones are another matter...eventually stall out (gearbox busted) or disintegrate.
” and have a metal roof”
What’s the importance of a metal roof?
Me too. I have 18 panels, and they do about 2/3 of my electricity.
I added a few electric baseboards, and on sunny days in the winter, I let them run. My Oil bill is half what is was.