EV equivalent tariff for home batteries 15 October 2022 at 12:56PM in Green & ethical MoneySaving 3 replies 192 views

phillybeccy

Does anyone know of an EV equivalent tariff that could be used for charging up home batteries. It seems illogical that, if it is economic to have a tariff for electric vehicles, why they don't have one for home batteries that could change up using the same timings to use the same excess night time power.

Thanks

David

QrizB

Economy 7? With recent price changes there are lower off-peak prices available on E7 from eg. EDF than on the previous favourite Octopus Go / Go Faster.

BTT43

Octopus intelligent is the best ev tariff to charge your battery but you must have an ev. If you use 10kwh per day you can save £1000 per year just by having a home battery without solar

QrizB

BTT43 said:

Octopus intelligent is the best ev tariff to charge your battery but you must have an ev. If you use 10kwh per day you can save £1000 per year just by having a home battery without solar

I don't think the maths stack up.

To save £1000 a year on 10kWh a day you'd need to save almost 28p/kWh. Given that Flexible Octopus is currently capped at 34p/kWh and Intelligent is 10p/kWh, plus you'll lose perhaps 10% each way with conversion to/from the battery, savings are more like 22p/kWh which is £800 a year.

And a 10kWh battery plus inverter is at least £6k, so it'll take seven+ years to pay for the battery before you make any actual savings.