I assume it would be the same as when people install solar panels and feed excess power back into the grid. Many power companies do pay people for the excess p

I assume it would be the same as when people install solar panels and feed excess power back into the grid. Many power companies do pay people for the excess power and you can in effect be a producer for your electric company and not a consumer. Unfortunately not all of them do that. Austin Energy for example charges you the normal rate for all electricity you use even if you generate it with your own solar, and then monitors how much you generated and pays for that at a lower rate in the form of credits. So if you generate enough extra power you can end up with a $0 bill and reduce your next bill. But if you generate more than you use every month you'll never get any monetary return, and of course the rates can vary.