A sand battery would work[0] if you have the space ;) https://polarnightenergy.com/news/worlds-largest-sand-battery-now-in-operation/ https://polarnightenergy.

A sand battery would work[0] if you have the space ;) https://polarnightenergy.com/news/worlds-largest-sand-battery-now-in-operation/ https://polarnightenergy.com/news/worlds-largest-sand-batter...