Who says we have to produce the batteries? I mean obviously we ought to have the capability for national security reasons, much like we ought to have the capability to make (green) steel and suchlike, but I'm talking about installing BESS systems for the grid, pylons, sub-stations. Boring shit that will save everybody money and transform our lives and the economy.
And you should go and tell the offshore wind folks about your theory.
https://davidturver.substack.com/p/obscene-profits-offshore-wind-farms
The genius of a wind farm is it doesn't need fuel so the operating costs are super low but they can sell the electricity for more or less the same price as a gas power station.
Also, build onshore wind. Build onshore solar. Produce the electricity close to where it's needed e.g. urban centres, industrial parks, ports, military bases etc etc.