Well, if you don’t manage the power grid, it doesn’t sound so bad.
Only few kinds of power plants can be taken on and off with a flick of a switch. Many need some time to come online. Then there is the strain on the equipment, as frequent thermal cycling wears the materials rather badly.
Larger areas have the grid strain issue.
Batteries have rather lousy energy storage density.
I’d rather go for hydrogen, in a cascade of electrolyzers/fuel cells, which would concentrate deuterium as a byproduct. This, together with lithium-bred tritium, can be used as a fusion fuel.
Meanwhile, go aggressively for molten salt thorium reactors. The molten fluorides are rather hard on most of the alloys, leach quite some of the alloying elements, but the problem is solvable. Such reactors should be pretty safe, and won’t require so much spare reactivity (and therefore enrichment) as the neutron poisons (notably xenon that itself absorbs as much neutrons as all the other fission products together) can be removed from the circulating melt.
