Electricity can be stored, mostly in pumped hydro storage, but also in e.g. battery storage, pressurized air or heated rock. But storage is scarce, expensive an

Electricity can be stored, mostly in pumped hydro storage, but also in e.g. battery storage, pressurized air or heated rock. But storage is scarce, expensive and doesn't look like it is going to be built anytime soon (for the usual reasons, NIMBY, environmentalism, YAGNI (correct or imagined), "energy abstinence is more virtuous", "we can manage by regulating demand", etc.)