What's wrong with negative electricity pricing? Are utilities meant to let consumers overvolt the grid and use their industrial customers and utility-scale generators to counteract it without any compensation or disincentive?
I have no roof but I would happily have a day of battery around in the bad weather and use it to drastically cut my electricity costs in good weather. In a world with competitive grids or grids that couldn't charge negative, I think some regulatory complexity would suddenly evaporate and someone much like the paradoxical utility sponsored energy saving consultant might show up to help me do that.