I have a roof facing south with full sun exposure from sunrise to sunset. A local professional solor company come and gave me a 100% supplemental quote... well after all the incentives and subsidies offered by the Fed govt and state and local govts of PA, my out of pocket bill was going to be approx. $35,000. He then proceeded to sell me on a fancy way of looking at return on investment that was WAY over my head. I went home and this is the math I wrote out on a napkin:
$35,000 (not including interest charged on financing) divided by $100p/m normal monthly electric bill = 350 months or 29yrs. of normal electric bills assuming no fluctutions, plus additional time to pay off interest accrued, plus additional time to pay off maintenance needed. Assuming I'll need a new roof in the next 5-10 years, didn't help the sell, then again after another 20-30yrs led me to realize i'm pissing in the wind.
final answer was "no" for me. Hope this helped in some weird way
Home Built 1995
13acres in the middle of the woods
Kids, Tractors, family