Nice idea Brydo but it’s not going to happen. You scenario presumes EVs would sit at home plugged in most of the time which of course they don’t.
They sit at work during the day, connected to the 7kW posts, absorbing the midday solar peak, there’ll be plenty of electricity spare for the aircon at the office.
As usual, the trouble comes when there’s a high pressure system in the winter & the weather is cold, clear, and still.