I have talked with many people including engineers who wanted to do their part by going solar. Everyone of them would not recommend it to their friends. Payback never came, parts wear out, maintenance during winter, [clearing snow off] and by the time ROI showed up the systems need to be replaced. I install solar for livestock watering and that works well but for domestic I need someone to show me where it is feasible without government assistance helping to make it worth the money and I don't like that part of it. If it can't pay for itself it is a hoax in my opinion. Our city participated in green energy for several years, when I asked the mayor about it he said their/our involvement cost the city lots of money to do that but it was the only way they could get certain grants and government loans by being "green". We finally got out of the green business as it was too costly. Just my two bits worth.