If the EV gets 4 miles per kWh, this means a charge rate of 500 kWh- that's charging at over 1200 amps on a 400 volt EV architecture. And that is assuming it can charge at a constant 500kWh for the entire cycle
What can be achieved in testing doesn't always translate into real world numbers.
At a 350kWh charge station the best case scenario will be about 30 minutes. That not bad, but it's not "500 miles in 15 minutes". If you have a large EV truck or SUV, it's going to need twice as much time to get the same range as most of the average 2 miles/kWh.My Chevy Bolt gets about 4 miles/kWh, but charges at 55 kWh max. The vehicle determines how fast the car will charge, so in order to achieve these numbers, the EV would need some heavy duty wiring and charge capacity.