Batteries, while very efficient, have some pretty harsh scaling problems, and are very expensive for the tail end of availability needs. There are plenty of ene

Batteries, while very efficient, have some pretty harsh scaling problems, and are very expensive for the tail end of availability needs. There are plenty of energy storage options that are comparably inefficient but scale much easier (such as hydrogen storage or thermal storage), but lower energy production costs can mitigate the expense of inefficiency.