It’s very hard to be sure of any electric prices but I use Octopus go faster which gives me 5 hours at 5.5p and I take that from 20.30 to 1.30 now that is quite a good time to do washing heating etc so can combine with car so when you get bill it’s averaged over total and last time came in at 9.2p per unit overall so makes a bit more sense when trying to compare I use about 300 units per week including car charge