Toggle what's installed — including your tariff type and smart tech setup — and watch the estimated annual electricity cost update, for a typical UK 3-bed home.
Estimates only, based on typical annual energy costs for a UK 3-bed home. Your actual costs depend on your usage, tariff and system size, so get a tailored quote for real figures.
Your household's electricity pattern changes overnight. Your tariff should too.
The most common smart options focus on Electric Vehicle (EV) drivers, heat pump owners, or dynamic wholesale tracking:
| Tariff type & example | Off-peak rate | Peak rate | Best for |
|---|---|---|---|
| Intelligent Octopus Go | ~5.5p/kWh | ~32p/kWh | EV drivers with compatible chargers (6-hour daily cap) |
| E.ON Next Drive Smart | 6.9p/kWh | ~31.7p/kWh | Fixed overnight EV charging (12am–7am) |
| EDF GoElectric | ~6.99p/kWh | ~32.39p/kWh | Longest overnight window (7 hours, 11pm–6am) |
| Cosy Octopus | ~14.5p/kWh | ~53p/kWh (50% above day rate) | Homes with heat pumps or electric boilers (3 off-peak windows daily) |
| Octopus Agile | Dynamic (changes every 30 mins) | Capped at £1/kWh | Homes with solar panels or home batteries |
It saves you money if you can shift heavy electricity usage — like charging an EV, running heat pumps, or operating washing machines — into the cheap overnight hours.
It will cost you more if your household uses most of its electricity during the late afternoon and evening peak hours, as the higher peak rates will outweigh the overnight savings.
Not sure which applies to you? Toggle your setup — EV, solar panels, or a home battery — in the Energy Systems Lab above to see your own estimate, or talk to our team for a personalised recommendation.
Any solar power you don't use can be sold back. Here's how that income works.
Automated systems that decide the cheapest time to charge and the best time to sell.
