What's nice there, though, is that the total amount of _energy_ needed at a charging station is roughly fixed(), regardless of how fast you charge the cars. So if you're provisioned for the needed total energy inflow, you can to a reasonable degree compensate for having a more bursty high-rate charging load by having some amount of local energy storage as a buffer.

() - Assuming you provision for the highest-traffic-volume day. Ignoring potential induced demand of making it a little easier to drive, which I suspect is pretty bounded - people need pee and stretch breaks anyway.