Havenwise cannot provide fully objective, personalised tariff advice. That's because every house is different, with different lifestyles, different home devices and different needs. However, we can offer general advice on how different tariffs interact with Havenwise.

It depends on how your home uses electricity, and what other devices you own. It’s not as straightforward as picking any old heat pump tariff. These are the best options for different types of homes:

If the only smart device you own is a heat pump, then we suggest a tariff such as E.ON Next Pumped, Octopus Cosy or EDF Heat Pump Tracker. These tariffs give you cheap rates for heating your home throughout the day, as well as peak rate (excluding EDF Heat Pump Tracker). Havenwise works around these slots and heats your home for less.

If you also own an EV, you can access tariffs with super cheap overnight rates. Tariffs such as Octopus Intelligent Go, E.ON Next Drive or EDF GoElectric give you a super cheap period of electricity overnight. Havenwise can take advantage of this super cheap window to pre-heat your home and keep your bills down.

Octopus Agile offers some of the cheapest electricity by tracking half-hourly wholesale prices, which are typically around 30% lower than standard tariffs and can even go negative during periods of excess green energy. Prices can spike at peak times (up to 100p/kWh a few days per year), so it’s best for risk-tolerant users or homes with a battery.

You are probably best off using a fixed tariff. This might mean you pay a little more for your electricity than a time-of-use tariff, but your price will be the same regardless of the time of day. Your prices will also be fixed, so won’t go up if market prices increase.