Heat pump running cost in Southampton
For a typical 3-bed home in Southampton, at the Ofgem price cap of 26.11p per kWh electricity (1 July – 30 September 2026). Southampton’s climate means it needs about 11,250 kWh of heat a year.
One of the mildest cities in the UK, so a heat pump runs fewer hours here than almost anywhere — the running-cost case is unusually strong.
The numbers behind that
- Heat a typical 3-bed home in Southampton needs: about 9,563 kWh a year, once boiler losses are taken off.
- Electricity a heat pump would use to deliver it, on existing radiators: about 3,297 kWh.
- Break-even electricity price: 28.22p per kWh. The cap is currently 26.11p, and gas is 7.33p.
- With radiators sized for a heat pump, the saving rises to about £196 a year.
The weather in Southampton sets how much heat you need; your radiators set how efficiently a heat pump delivers it. If your break-even price is above what you actually pay for electricity, the heat pump wins — a dedicated heat pump tariff can move your real price down far enough to flip a borderline case.
Run it with your own numbers
Put in your own gas use, radiators and tariff — the honest answer is specific to your house.
Open the calculatorHeat pump running cost in other places
Or by property type
Electricity priced at the Ofgem cap for 1 July – 30 September 2026 (26.11p per kWh). Figures are estimates for a typical 3-bed home to help you think, not a quote — get a survey from an MCS-certified installer before committing.