[ironhaven]

Depending on the the wind/nuclear mix in the grid possibly as low as zero.

But batteries are a very important innovation for power grids regardless of renewable energy goals. 50% of the job of an energy grid is just keeping the ac power supply stable when generation does exactly match consumption. Lithium batteries help smooth out spikes in demand over milliseconds and hours to save millions of dollars

Lithium grid scale storage is awesome no matter what happens with renewables.