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.
But in exactly the same way that we don't expect people to provide their own petrol refuelling systems at home, there's no particular reason why we should expect people to provide their own home charging.
There is, of course, a very good reason to do so, as it will enable owners to make money from their EVs using the Vehicle to Grid technology that's already available and is going to be expanding rapidly over the next few years. The early adopters now who are going for domestic battery installations are going to be able to take even more of an advantage.
Much of the development work in the industry is focused on 'opportunistic' charging, doing things like using the existing network for things like street lighting to provide charge points.
