China does subsidize their electricity, and are self declared communists. It seems like if it goes to corporations it would be more of a Corporatocracy however.

Do you have an example of a city that runs on renewables with battery storage with no duplicate backup base load generator?

As far as I was aware there were none, as it is non-feasible outside of areas with hydro dams for power storage.

Maybe Nuclear, given it can actually support the base load power, except they need to fully deregulate it first so Nimbys and lawsuits balloon the cost. It shouldnt cost more nowadays in inflation adjusted terms than France building them in the 70s.