We installed solar on our house about 11 years ago. I've been extremely happy with it. We bought the system outright so we own the panels and all the power they generate. I wouldn't recommend doing the lease that some were talking about this morning. Between the lower electric bills and the money we make by selling the "renewable energy credits" on the market, we've easily paid them off. Overall, I'm definitely happy with the purchase. Also ...even after all this time, I haven't noticed any diminished production due to the age of the panels.