500 W Panel Heater running cost — 5 h shoulder season
A 500 W Panel Heater (500 W) running 5 hours/day uses 2.50 kWh and costs 65.3p/day at the Ofgem cap of 26.11p/kWh (1 July to 30 September 2026).
500 W Panel Heater — 5 h shoulder season: 500 W ÷ 1000 × 5 h × 26.11p/kWh = 65.3p/day. Weekly (5 days): £3.26. Annual: £169.72. Coverage: Small bedroom, bathroom, hallway (~8 m²). Source: Energy Saving Trust (wattage, typical/indicative); Ofgem (OGL v3.0).
- Per hour
- 13.1p
- Per day (5 h)
- 65.3p
- Per week (5 days)
- £3.26
- Per year
- £169.72
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 × 5 h = 2.50 kWh/day.
- Daily cost: 2.50 kWh × 26.11p = 65.3p.
- Weekly (5 days): 65.3p × 5 = £3.26.
- Annual: £3.26 × 52 = £169.72.
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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.