Have an ID.4 with an Ohme Pro charging unit at home and on British Gas EV tariff at present.
Have the price cap set to 7.91P through the Ohme app, and plug it in at night before I go to bed* then get ~5hrs charge between midnight and 5am with no bother.
Normally I plug it in everytime it drops to about 40%, but when it was raining last month a lot I ran it down to 5%.
The only problem was it curbs the cars power to preserve the battery. I can put up with such vagaries, for £6 a tank 🙂
*I plug mine in at around 6pm usually before it gets dark
