This is a question that you need to decide for yourself, but I will give you the facts, then you can make your conclusions. First, Do you pay taxes? Taxes are very Important because of the discount of 30% from federal is attached to the taxes you pay. If you are retired, or self-employed and you do not pay or pay little federal taxes then buying is not for you, the ROI(Return On Investment) would be over 15 to 20 years. Second, how long you want to live in your house; The national average is seven to ten years. If you buy the average ROI is 8 to 10 years. Another relevant issue is maintenance which with Lease will come with the system with Guarantee production. The one thing that is very attractive with purchase is No more electric bill for a life of the solar which is 25 to 30 years. Ohhhhh Babby!!!!