The power requirements to run, say, 100 chargers, potentially all at once, are potentially bananas. If there's going to be large-scale charging, there's also going to have to be some kind of load-orchestration system involved, too.
There already is, companies like EverCharge (https://evercharge.net/) deal with load orchestration. However even if every parking spot has a car that’s plugged in, most of them probably won’t be charging at any given time.
