Wow, maybe you should give up on the climate scientist and talk to an electrical engineer. First you state that that there is no need to change out the transmission lines from the power plants and then you state we need DC electricity to implement the local charging structure. Do you understand the difference between DC and AC electricity? Do you understand there advantages and disadvantages? Do you understand that AC can Be converted to DC and vice versa? Do you understand the huge costs of what you're trying to do?

The only advantage DC electricity has over AC is it provides lower line losses in long distance electric delivery. Going DC only on the local lines completely cancels out any advantage of DC over AC. Going AC from the power plants and then converting to DC from the local grid completely ruins any advantages of using DC.

You do know changing the local grid over to DC would mean either building a complete second grid, forcing everyone on the grid to add a full house DC to AC convertor, or requiring the electric using customer to replace every single electrical appliance in their house. All of your home appliances run on AC.

You're talking about completely replacing the entire grid just so you can charge car batteries. How about we leave the grid alone and suffer through the minor inefficiency of converting AC to DC where the grid meets the car just like we do now.

If you're going to keep the plants and the interstate transmission line AC, you might as well keep the local grid AC