Originally Posted By Hamwich
Originally Posted By ewn
Domestic supply is only rated at 9kw per hour


Sorry ewn, 9KW per hour makes no sense, wattage is a delivery of power (energy per second).

Max current rating on a UK domestic consumer unit is 100A, beyond that you need multiple supply points / consumer units at the same location (not a problem, we have 2) and for very high consumption you can go 3-phase.

100A means that at 240V you could in theory charge at 24KW, but you'd have to leave a bit to enable your other homes systems to run and you would need dedicated wiring to the charge point.



Your consumer unit and wiring might be rated at a maximum of 100A but I very much doubt that its rated at 100A continuous which is effectively wht is needed to charge a car battery.

However, the key is the capability of the incoming supply to the house. Is there a maximum rating for a domestic dwelling or can you have as much power as you want by agreement with the power distribution company?

Sure the architecture of the national system has to be based on non domestic charging if only for the reason that lots of people dont have drives or garages to put the car whilst charging