I talked to a guy at a party who sells rooftop solar systems here in Ohio (supposedly 75% of San Diego's sun). For up to a eight kilowatt system, 80% will be r

I talked to a guy at a party who sells rooftop solar systems here in Ohio (supposedly 75% of San Diego's sun). For up to a eight kilowatt system, 80% will be reimbursed via grants from a combination of the state and federal government. So, instead of paying $50K, I'd only pay $10K up front for a system that might last 20 years. He said that it would generate 10,000 kwh of power per year on my roof. At about ten cents/kwh, that's about a grand. So, a 10% ROI doesn't sound too bad although I question the maintenance cost stream over the product's lifetime. However, it's not so rosy. The power company (at least in Ohio) only must pay about three cents per kwh to the homeowner for putting power back onto the grid. So, at least some percentage of that 10% ROI gets turned into a three percent ROI. Even at 80% off, it's still a bad deal at current pricing levels!