EV tariff increases the daily tariff !

[BarryH]

The other thing to remember is the whole house runs at the lower rate, not just the EV charger so if you have appliances with delay timers e.g. washing machines, tumble dryers and dishwashers you can run those more cost effectively. Might even be cheaper to heat a water tank with a low rate immersion heater than gas (but that would need some spreadsheetery to confirm)

I now have a Heat Pump and heat my hot water using that at night which has a 250% efficiency for hot water and that at the 7p IOG rate. My heating also boosts and over heats the house (excluding the bedrooms) building up heat in the fabric of the house walls thereby reducing heating needed in the fist part of the day. BUT even before I had a heat pump and used Gas Central Heating, I moved every thing I could to the off peak hours and achieved 65% use off peak then I added a little bit of solar and a 10 kWh battery (9 kWh useable) and got to 98% off peak. Now I've a heat pump I back down to 65% in winter but 95%-98% for the bulk of the year. And for for a substantial part of the year I'm also exporting surplus Solar PV generated kWh. Even as late in the year as October my Octopus bill showed £40 export and £60 import so net the house is low cost to run. Sure I invested in Green Tech but under £10 over 2-3 years which is less than my car depreciated over the same period.