we leased, and put some money down to make our lease payments lower. Supposedly, they can come get them in 15 years, but the rep didn't think they would want them. We don't have the max amount we could have on our roof, because we have a room with vaulted ceiling, but we have enough that our energy use is taken down to the lowest pay tier, so we pay the lowest rates, usually. We save about $100 or so a month, more in the Summer. We pay $38 a month for the lease. We are pretty happy with it. The energy companies here raise the rates often, so we like not being impacted so much by them. I think if we were able to have more panels, our savings would be better- I just remembered that because we have an older house, we were limited on the panels or we would have had to change out our electrical panel- for a few grand, we decided not to.