In the UK you get paid for the power PV puts back into the grid. They do however keep scaling back the payment, but thankfully they don't apply it retrospectively to existing installations.

I looked at solar when we moved 3 years ago, but the figures just didn't make sense. Yes I would have got my money back after a few years, but none of the estimates you see listed include things like replacing failed inverters (or worse). Had we moved a few years earlier, when the subsidies were higher it would have made perfect sense.

Also it might still make sense if I had £10,000+ just sat around doing nothing, but when the choice comes down to deciding between spending money on fixing other parts of the house and solar, keeping the house standing wins. Though it occurs to me that maybe I should run the figures again, but taking the money out of our mortgage account where the interest rate is down at 1.25% (for now at least)