500 W Panel Heater running cost — 6 h daytime (home-worker)
A 500 W Panel Heater (500 W) running 6 hours/day uses 3.00 kWh and costs 78.3p/day at the Ofgem cap of 26.11p/kWh (1 July to 30 September 2026).
500 W Panel Heater — 6 h daytime (home-worker): 500 W ÷ 1000 × 6 h × 26.11p/kWh = 78.3p/day. Weekly (5 days): £3.92. Annual: £203.66. Coverage: Small bedroom, bathroom, hallway (~8 m²). Source: Energy Saving Trust (wattage, typical/indicative); Ofgem (OGL v3.0).
- Per hour
- 13.1p
- Per day (6 h)
- 78.3p
- Per week (5 days)
- £3.92
- Per year
- £203.66
Heater specification
- Rated power
- 500 W (0.5 kWh/h)
- Coverage
- Small bedroom, bathroom, hallway (~8 m²)
- Cost per kWh (Ofgem cap)
- 26.11p
- Cost per hour
- 13.1p
Energy Saving Trust — typical 500 W panel heater rating
How the cost is worked out
- Wattage: 500 W Panel Heater draws 500 W = 0.5 kWh per hour.
- Daily use: 0.5 kWh × 6 h = 3.00 kWh/day.
- Daily cost: 3.00 kWh × 26.11p = 78.3p.
- Weekly (5 days): 78.3p × 5 = £3.92.
- Annual: £3.92 × 52 = £203.66.
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500 W wattage from Energy Saving Trust — Heating your home guide (typical appliance ratings) (typical/indicative). Unit rate 26.11p/kWh from Ofgem — Energy price cap unit rates and standing charges (1 July to 30 September 2026), OGL v3.0.