EV charge times

Vehicle charging is most definitely defined in terms of current even if it's presented to the user as power. The charger signals to the car a current it is allowed to draw, and the car draws up to that amount (less if its battery is near full) independent of voltage. Hence a common "7 kW charge point" is really a 32 A charge point which ranges from 6.9 kW to 8.1 kW over the allowable voltage range. A “22 kW charge point" presents identical signals to the car allowing it to draw 32 A, but provides all three phases.

Where the cable from charge point to car is provided by the user, the a resistor in the cable also encodes a current rating for the cable, and the car treats that as an upper limit irrespective of what the charge point signals.

Fast DC chargers move the power electronics to the roadside and take commands from the car as to what its battery wants, but they still measure their input current to keep within the programmed supply limits.

Vehicle charging is most definitely defined in terms of current even if it's presented to the user as power. The charger signals to the car a current it is allowed to draw, and the car draws up to that amount (less if its battery is near full) independent of voltage. Hence a common "7 kW charge point" is really a 32 A charge point which ranges from 6.9 kW to 8.1 kW over the allowable voltage range. A “22 kW charge point" presents identical signals to the car allowing it to draw 32 A, but provides all three phases.

Where the cable from charge point to car is provided by the user, the a resistor in the cable also encodes a current rating for the cable, and the car treats that as an upper limit irrespective of what the charge point signals.

Fast DC chargers move the power electronics to the roadside and take commands from the car as to what its battery wants, but they still measure their input current to keep within the programmed supply limits.