Calculate Your Site's Solar Potential
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Section 1 — Electricity Costs
p/kWh
Please enter your unit rate.
📐
Section 2 — Roof Area
🗺️ Satellite map: To enable address search and roof drawing, add your Google Maps API key to this file — see the setup instructions in the HTML comments at the top. Without a key, simply enter your roof area in m² using the field below. A rough estimate is fine at this stage.
Click once per corner to trace your roof outline. Double-click to close the shape and calculate the area.
Click once per corner to trace your roof outline. Double-click to close the shape and calculate the area.
Satellite view not active
Add your Google Maps API key (see top of file) to enable satellite imagery and roof drawing.
Until then, enter your roof area manually below.
Until then, enter your roof area manually below.
or enter area manually:
m²
Based on your roof area and consumption data
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kWp
Estimated system capacity
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kWh / year
Estimated annual generation
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£ / year
Estimated electricity savings
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tCO₂e / year
Estimated carbon offset
Take the next step - request a Desktop Feasibility Study
This estimate shows the maximum solar potential for your roof space. The next step is sizing the system around your energy consumption. Request a Desktop Feasibility Study and, if you can provide 12 months of electricity data, we'll produce an initial design tailored to your site's specific load profile.
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We'll review your assessment and contact you as soon as possible.
Assumptions
Indicative estimate only. This tool uses fixed assumptions and your stated tariff and consumption data. Actual generation and savings will depend on factors like shading, roof condition and panel layout. Orientation and tilt adjustments are applied in a detailed desktop feasibility study. The carbon offset figure uses the UK grid emission factor of 0.177 kgCO₂e/kWh (DESNZ 2024). For this estimate, we have used a specific annual yield of 950 kWh/kWp.