Unless you are one of the chosen few to get picked for the Government rebate I highly doubt you would ever come close to seeing a return. Sat in an office next to a green energy salesman when I was a salesman for a global electrical supplier. Heard all the training sales pitches and corporate dialog. If you are considering, be very cautious and read all their contracts very carefully and get stated life expectancy of the arrays and associated equipment. And be very very suspicious of everything said. Last thing, make sure and ask to see that everything installed is UL listed. We just removed and destroyed over $150,000.00 of solar equipment off an older model center for a national homebuilder that was not listed. Solar company got investigated after numerous fires were caused by their equipment. Closed up shop and ran overnight. Homebuilder wanted it destroyed and video taped in case anything ever linked them. Just be real careful.