The Real Cost of Leasing vs. Buying Solar Panels

Buying solar panels requires an investment and more decision-making than leasing, but over the long term the benefits of owning your system are hard to beat.  Buying your solar electric system outright is best. It usually costs $15,000 to $20,000 after tax credits and can reduce your electricity bill by 70 to 100 percent, depending on the size and orientation of your roof and local regulations. 

Most systems pay for themselves in five to seven years.

http://www.consumerreports.org/energy-saving/real-cost-of-leasing-vs-buying-solar-panels/