Wasteful is relative. Our house produces 250-300% of our usage most days, but 5-50% of our usage some weeks.

Heating and cooling (and the computers that manage the batteries, which draw about 200W, including internet!) is hard to timeshift, but everything else is easy to move to sunny days.

Anyway, on those sunny days, electricity is literally free. I wish I could just dump it into a magic box that pulled charcoal out of the atmosphere.