Or people installing renewables theirselves minimizing power demands to the grid. It could be very easy with a fair contract with energy companies, if they pay for your excess of energy same as they get paid, batteries would not be necessary and the cost and amortization period of renewables will drop dramatically. Then they would become widespread, cost will drop some more, and at some point people would start becoming self suficient
wich is exactly the reason those companies don´t provide that option