I've had solar on my roof for 4 full years now. 27,600 initial costs minus 45% donated from my Fed and State rebates 12,420 dollars. that's 15,180 I have to pay. My 1897 2.5 story Victorian used to cost me 225 in the summer to cool. Now I cool it for less than 100 and most summer Months 35 bucks. I installed a heat pump with another rebate offered andI now also heat my house with them for all but the coldest days. Got a lifetime warranty on the Amana heat pump. My panels have made more electricity every year so far. Weather patterns I assume. My pay back was set to be a 7 year plan. Then we got Bidenflation on the energy. Electricity costs went up and I'm now looking at a 5.5 year payoff