That would be great if it worked both ways. I don't have a choice, I have to use PG&E. They have no incentive to lower prices when their energy prices drop. The point of all those regulations is to force them to pass on their savings to consumers who have no choice in energy provider.
If we have so much solar generation during summer, why isn't my energy free or nearly so? If the market worked correctly, they would be paying me to use energy in the summer.
But instead PG&Es profits get to go up, because I have no choice but to use PG&E.