We already have rain and hydro power plants. Batteries are similar: they store a finite amount of energy. So battery PV and wind have their place as peaker plan

We already have rain and hydro power plants. Batteries are similar: they store a finite amount of energy. So battery PV and wind have their place as peaker plants to replace gas fired power plants and hydro. Otherwise one could just smelt aluminium with the excess electricity like the Germans do.