Infrared panel consumption depends on electrical input and actual operating time. A reliable cost estimate also needs the heated room or area, target temperature and controls. This guide distinguishes output, energy use and cost, and explains how to check a calculation against measurements.
Key points
Watts describe power, kWh describes energy and euros describe cost at a chosen tariff. Do not use one operating factor for every home. Compare systems at the same demand and comfort. High conversion of electricity to heat does not by itself prove a low annual bill.
What determines consumption?
Heat loss through the envelope and ventilation, outdoor temperature, target indoor temperature and hours of use affect demand. Controls determine when the panel switches on. At high demand, a panel may run for long periods or continuously; a thermostat does not guarantee one-third operating time.
Walls and furniture can absorb and later release heat, but storage creates no energy and does not cancel losses. A convector can also warm the structure through heated air. Different heat distribution can affect comfort; a fixed reduction in air temperature with unchanged comfort is not established for everyone.
Calculating: from watts to kWh and cost
The basic formula is: kWh = watts ÷ 1000 × actual on-hours. A 1000-watt panel actually on for three hours uses 3 kWh. If controls are enabled for six hours but switch the panel on for only three, operating time is still three hours. This is an example, not a prediction for your home.
Multiply kWh by your applicable electricity tariff. With variable tariffs, add costs for each period. Treat fixed costs separately. For several panels, add each appliance’s consumption; a shared schedule does not mean identical on-times.
Measure rather than assume a fixed factor
Use only a suitable energy meter or designed-in monitoring function with adequate load capacity. Record consumption, settings, usage and weather per period. One mild day cannot establish annual consumption. An installer can help with fixed wiring or uncertain measurement arrangements.
A fair comparison with other heating
Direct electric resistance heating converts electricity largely into heat at the point of use. This is not unique to infrared panels. A heat pump can also move environmental heat and therefore need less electricity for the same delivered heat. Compare the whole system and application, not only purchase price and appliance-level efficiency.
A gas comparison includes fuel price, boiler and system losses, controls and maintenance. Local supplementary heating also requires accounting for energy genuinely avoided elsewhere. A lower gas bill alone does not prove lower total cost when electricity use rises. No universal payback or savings percentage applies.
Practical steps to limit unnecessary use
Schedule heating around occupancy, position the sensor as instructed and check that settings are followed. Avoid furniture blocking coverage and preserve safety clearances. Choose wall or ceiling by model and coverage; ceiling mounting does not guarantee lower consumption.
Limit heat loss through suitable insulation and draught measures while retaining necessary ventilation. Follow cleaning instructions and do not add insulation behind a panel without manufacturer approval. Low maintenance does not mean inspections or repairs are never needed.
Our advice for a verifiable estimate
We help private and business end users, installers and wholesalers. Share dimensions, insulation information, intended hours and existing heating. We can advise on capacity, positioning and controls and explain proposal assumptions. A quotation does not guarantee a fixed annual bill.
From expectation to an informed choice
Use the formula for a checkable example and measure actual use where possible. Assess a full season before drawing firm annual-cost conclusions. This grounds the choice in your situation rather than general efficiency or origin claims.
Consumption questions
Should I maintain a constant base temperature?
It depends on use, warm-up time and building. A higher temperature during unoccupied hours can increase losses; reheating also takes energy and time. Choose a suitable schedule considering damp, frost and comfort. Constant temperature is not automatically cheaper than setback.
Do solar panels make heating free?
No. Generation can cover simultaneous use, but investment and foregone export revenue also belong in a comparison. Winter demand and solar generation do not always coincide. Use current contract terms for export, storage and supply; this article provides no fixed tariffs or legal assurances.