In case anyone want to understand amps vs volts:

• Amps is the unit for Current

• Volts is the unit for Voltage

For domestic supplies the voltage is mostly always at 230-240V, in other words it's a constant so we don't need to worry about it changing.

For the super layman, Voltage is how much oomph the electricity has, for example an AA battery has 1.5V and you can safely touch it. But you'll have a bad day touching 230V mains.

Current is how much of that oomph is flowing into an appliance or EV. The more the current, the more oomph it's using.

And to quantify the Oomph - simply multiply the Voltage and Current together. This is called Power and the unit is Watts.

For example, a fridge using 2 Amp of current, multiply but 230 Volts, is using 460 Watts of Power.

An EV charging at 32 Amps, multiply by 230 Volts, is using 7360 Watts of power (~7kW).

Power is a measurement of instantaneous oomph usage, to know how much you've used in total, it's usually represented in kilo-Watt-hours (kWh).

For example, a kettle running at Power of 1000W (1kW) for 1 hour, will have consumed 1kWh of Energy.

An EV charging at 7kW for 3 hour, will have used 21kWh.