The quantity of kilowatt hrs (kWh) you ship to your local utility and pull from it are “netted” every month. The overhaul arrives as California has to lean more seriously on renewable energy to fulfill state targets to create zero-carbon electric power by 2045 and conclude utilization of fossil fuels. https://www.americanarraysolar.com/4-factors-to-remember-when-choosing-the-solar-company-visalia/