I did some basic maths. Our electricity spend is about £90 a month, of which £15 is the standing charge. Octopus go has a 20% premium for 20 hours, meaning my £75 electricity usage, plus 20% would be £90. In reality a little less as the fridge/freezer would be using 4 hours of cheaper electric. So the question is would I save £15 a month charging the car. I have taken a conservative annual mileage of 7500 which assuming 300 miles per charge is 25 a year. at 28.46p that equates to £455.36 and and £120.00 at 7.5p, a difference of £335.36, £27.95 a month. Deducting the additional £15.00 for daytime usage equates to a saving of around £14.00 a month. If a 21.30 or even 22.30 start is available then the savings ratchet up as its possible to use high consumption items like dishwashers, tumble dryers etc. In fact its quite striking that even at 15000 miles pa, that’s just 1 charge a week. Like you, we use gas for heating, although I am not sure how much we will use it this winter, our central heating boiler which is a modern one will cost around £1 per hour, if operating non stop. I think it’ll be a question of an hour or two in the evening, possibly using the electric fire after 21.30 so there is residual heat in the morning. The house is very well insulated, and although I don’t consider myself mean, I resent paying money to line the pockets of the power companies and ultimately the oil and gas producers. Apologies to the mods if we have drifted a little off topic.