Don’t need anything - you can switch to any tariff you like. Some will require connecting to the charger itself like Intelligent Octopus if you want to take full advantage of it, but as mine isn’t compatible I’m just on Octopus Go which gives me 5 hours of 7p per kWh each night. The charger is manually set to only operate during the cheap hours of the tariff.
From a three pin plug you can safely draw about 10 amps continuous without creating excessive heat at the plug, but the lower you can set it the better. At 10 amps and 240 volts, you’ll generate 2.4 KW in ideal conditions and thus over the 5 hours you’d get maybe 10kwh into the car, so roughly 30 miles of range for the average EV. This works out at a week to charge a 70 kWh battery…
So yes it CAN work, and you can save yourself a grand on the install if you don’t do that much mileage, but the wall chargers make things much more convenient.
The other option would be to join eon and have the longer hours to charge at 6.7p I suppose? But I am in the process of moving my export to octopus export so wondering can you have octopus export and be on eon for electric?




