Batteries are as yet inappropriate for long duration swings over weeks or months that cycle only a few times a year.
Better to compare it to thermal storage, PHES, simply curtailing it or even virtual storage via hydro or w2e (or hydrogen generation with no step where it is converted back to electricity or motion). All of which are more sensible than hydrogen for personal transport.
Better to compare it to thermal storage, PHES, simply curtailing it or even virtual storage via hydro or w2e (or hydrogen generation with no step where it is converted back to electricity or motion). All of which are more sensible than hydrogen for personal transport.