The problem with policies is that they can change. For years, California has had a policy in effect that required utility companies to compensate homeowners and small business owners for any electricity they exported back to the grid from their. But there is such a thing as too much of a good thing.
The thing about solar panels is that anyone can install them and make their own electricity. How dare they! It was never possible for individual homeowners to build their own thermal generating station or nuclear power plant.leads to the democratization of electricity and that is anathema to the utility industry.
The CPUC justified the change by saying the state needed more batteries to soak up electrons during the day and send them back to the grid in the evening and in fact the number of residential batteries installed in California has jumped. But batteries are expensive and add quite a large amount to the total cost of a rooftop solar system.