The current 800v standard is for 350kw charge rates. The avg nuclear plant is 1,350,000 Kw per reactor Texas has two such plants with four reactors two at each plant with the plant sized for four reactors each for a total of eight.
Each reactor could run 3857 chargers at 350kw each there are 4 of them so over 15,400 fast chargers just on those four reactors alone. I’m in the Texas power industry Texas has 125,000 mega watts of installed capacity with an avg summer capacity of just over 100,000 mega watts. 100k mega watts is 100,000,000 kw theoretically Texas power industry could simultaneously run over 285,000 fast chargers all at once.
As for current to the chargers commercial services to the local transformers are 15,000 volt three phase AC to drive a single 350kw Three way rectified charger would take 7.7 amps @15000v from each leg of the triple phase AC supply. Ten of such chargers would take 77 amps. Medium duty poles are rated for 7200 to 34500 volts three phase. 15,000 is just the most common. A typical power line of bare aluminum conductor will be rated at 100 amps each phase more than enough to drive ten chargers which is also the avg number of pumps at a service station. Going to dedicated HV lines to a sub station is an option with HVAC being 34500 to 500,000 volts three phase ratings.
“Yep, that’s gonna work out well, oops the power went out again...”
The solution would have to be a battery on the delivery side so it can slowly pull from the grid.