Night Storage Heaters Electricity Cost Calculator
Night storage heaters use electricity supplied at cheaper off-peak night time tariffs (Economy 7 and Economy 10). Storage heaters radiate heat stored during the night slowly releasing this heat the following day.
Storage heaters are rated in Watts (W) or Kilowatts (kW). Check what your heaters are rated at, then use our energy calculator to see how much each heater should cost to run per hour, day or week.
Storage Heater Running Costs
| Power Rating | Per Hour | Per Day* | Per Week |
|---|---|---|---|
| 400W | 7.42p 400W |
£0.52 2.8kWh |
£3.63 19.6kWh |
| 800W | 14.83p 800W |
£1.04 5.6kWh |
£7.27 39.2kWh |
| 1100W (1.1kW) | 20.39p 1100W |
£1.43 7.7kWh |
£9.99 53.9kWh |
| 1400W (1.4kW) | 25.96p 1400W |
£1.82 9.8kWh |
£12.72 68.6kWh |
| 1700W (1.7kW) | 31.52p 1700W |
£2.21 11.9kWh |
£15.44 83.3kWh |
| 2500W (2.5kW) | 46.35p 2500W |
£3.24 17.5kWh |
£22.71 122.5kWh |
| 3400W (3.4kW) | 63.04p 3400W |
£4.41 23.8kWh |
£30.89 166.6kWh |
*based on 7 hrs a day at maximum input using the Average rate of 18.54p/kWh (December 2019 tariff) for a unit of electricity. Heaters with a thermostat will automatically turn off when required room temperature is reached.
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