Roland Perry wrote:

Theo wrote:

Maybe they can load balance, so when you run the oven, tumble drier,
electric shower and GSHP all together the car scales back its charge
rate to avoid overloading the supply incomer.

A big maybe.

There are car-chargers that can have remote current transformer
monitoring, so can work out from the rated supply, minus usage, plus any
contribution from solar and throttle the car to what's available, e.g.
the Zappi

https://youtu.be/gwmiGf6tChE