[dgacmu]

As others have noted, urban gas stations are likely to be far less busy in an EV world due to the ease of distributed charging -- home, work, destination, etc.;

But I think you raise a good model for long-haul. I think of the pennsylvania turnpike gas stations as a worst-case situation: They serve a somewhat captive audience, many of whom are traveling so far they need a mid-trip fillup. So something like 80kWh/minute _does_ seem like what you'd have to do for those specific stations, and that's an average rate of 4.8MW, at least during prime time.

You can probably get away with half of that if you use local storage as use is much lower at night. But let's not - let's see what it takes to do 4.8MW.

The answer is: You don't need a substation. You DO need on-site transformers and switchgear from 12kV primary service. But to put it in perspective, 4MW is like a tiny datacenter or really big (new york size) office building. So it's not really too crazy to think about an EV per minute going from 0-80kWh in a dedicated area. Compared to huge underground gas tanks, I think the infrastructure part of it is pretty ok.