Solar Heating Calculator

Calculate your solar heating potential, cost savings, and return on investment. Discover how solar energy can reduce your heating costs and environmental impact.

Solar Heating Calculator

Calculate solar heating potential and savings

Monthly energy usage

Cost per kilowatt-hour

Total living space size

Solar Heating Benefits

Discover the advantages of solar heating systems for your home

Eco-Friendly

Reduce your carbon footprint with clean, renewable solar energy

Long-term Savings

Significantly reduce heating costs over 20+ years

Energy Independence

Reduce dependency on traditional energy sources

How Solar Heating Works

Understanding the technology behind solar heating systems

1

Solar Collection

Solar panels collect sunlight and convert it to energy

2

Heat Transfer

Energy is transferred to your heating system

3

Distribution

Heated water or air is distributed throughout your home

4

Savings

Reduced energy bills and environmental impact

  1. 1

    Assess Roof Space

    Measure available south-facing roof area (best), or east/west facing (10-20% less efficient). Need 20-40 m² for typical domestic system. Check for shade from trees or buildings - even partial shade reduces output significantly. North-facing roofs generally unsuitable in UK.

  2. 2

    Find Solar Irradiance

    Look up your location's average daily solar irradiance (kWh/m²/day). UK averages: South England 2.8-3.2, Midlands 2.6-2.9, North England/Wales 2.4-2.7, Scotland 2.2-2.5. Lower than continental Europe but still viable with current technology and tariffs.

  3. 3

    Select Panel Efficiency

    Choose solar panel efficiency: Budget 15-17%, standard 17-19%, premium 19-22%. Higher efficiency = more power from limited roof space. Premium worth considering if roof area restricted or partial shading present.

  4. 4

    Input Electricity Rate

    Enter current electricity cost per kWh from your bill (typically £0.24-£0.34/kWh). Solar savings directly tied to electricity rate - higher rates = faster payback. Consider export tariff (£0.04-£0.15/kWh) for unused generation via Smart Export Guarantee.

  5. 5

    Calculate ROI and Savings

    Review system cost (typical 4kW system £5,000-£8,000 installed), annual energy production, savings, and payback period. UK systems typically pay back in 9-15 years. Panels last 25-30 years, providing free electricity for 10-20 years after payback. Best ROI with high electricity usage during daytime or battery storage (additional £4,000-£8,000).

Pro Tip: Use Ctrl+Enter to calculate quickly, or Ctrl+R to reset the form.

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