The quantity of kilowatt several hours (kWh) you send out to your neighborhood utility and pull from it are “netted” monthly. We inherited a solar system on a house we not long ago bought. Through escrow, the system faulted and not developed any power by the time we took occupancy. https://www.americanarraysolar.com/what-kind-of-support-you-can-expect-from-a-solar-contractor-pleasanton/