They'd have to convince me that that is not already built into the per kilowatt hour cost.
Residential power generation changes the dynamics. If you've got enough solar generation capacity to power your home, then the grid is a backup that you're going to expect to stand in for the solar panels if they fail. If you never use it then the power company is building and maintaining the grid to your home for free. The only way they can recoup that cost is to charge the other customers more per KWH.