Startup Idea : Solar Power: Sell electricity per unit

Problem: I have worked on a Solar Power Project. I feel that Solar Power can and should be installed on as many roofs as possible. However, the major bottleneck I see in this is the high capital cost. Solution: In order to promote installation of Solar Panels, the best solution possible is to have the best financial solution possible. What I want to do is that the Solar company should install the Panels at their own cost on the customers roof and sell the electricity at a fixed cost with a certain escalation. This will resolve the problem for high upfront investment for the consumers and promote green energy.