Actually, there's a few companies out here in California that come out and install Solar panels on your roof with no cost to you. You use what you need for your

Actually, there's a few companies out here in California that come out and install Solar panels on your roof with no cost to you. You use what you need for your house, then I guess they make money by selling off the excess power. I'm not totally sure how it all works but I do have a couple coworkers who swear by it.