Comment Re:Everyone Saw The Reality (Score 1) 176
Fortunately for EV charging, there are Energy Management Systems compatible with NEC 625.41 A to manage overall load to the grid. This can address both the spikes (the rate of change in load, impacting voltage flicker) as well as the maximum load from the grid from a collection of chargers.
You're right that 350 kW is an incredible amount of power, but in many parts of the US, the distribution feeders operate at 12.47 or 13.8 kV. A 1/0 ASCR conductor (overhead) is rated for 242 amps, so at that voltage the circuit has a thermal rating of 5,000 kVA. Assuming 0.9 power factor, that's enough for 12 of the 350 kW chargers (at full output). A more typical conductor for a utility would be 336 MCM, rated for 519 amps, allowing for more than 27 of the 350 kW chargers (again, assuming all are at full output). Of course, the chargers are sharing the distribution circuit with other customers -- the indicative numbers would be for dedicated service.
1,500 kW is already claimed on paper through the Megawatt Charging Standard. That quickly gets to what you talk about -- taking service at transmission voltages.