check with your power provider..the "reverse metering" that made these deals look reasonable is coming to an end.
I've actually heard pros and cons of that. The problem with residential solar is that we don't have a valid way to store what we capture without maintaining battery banks and storing it in DC.
Selling power back allows for all of the customers to provide the companies with a vast solar array on someone else's property. They can essentially back-feed the grid without the cost of the panels being on the utility companies...THEN they can buy X-amount of power at $.75 and sell it for $1....profit!
The problem is, the cost of metering and the bill back, and taxes takes most of the profit.
I've even read some of the larger solar customers say the companies haven't been eager to pay anything back at all, despite their advertising. I want to do solar, but not to generate electricity...just to generate heat.