See what a new solar system could do for your home — get indicative figures for annual generation and potential bill savings from your address. A minute or two; clear, easy-to-read results.
Enter your postcode, tap Show map, and place the pin on your home. That position is used for your estimate so results match where you live.
Helps us identify the right home at this postcode.
Drag the pin onto your home or tap the map to move it. Blue outlines show building footprints where the map has them. Zoom in if outlines do not appear.
Roof snapshot
Illustrative only — not a site survey
Updates when you change the roof face tab above.
Sunshine, yield, and layout limits apply to the building model for this address—not the single roof face above.
Indicitive installation costs for the roof face selected above.
Roof footprint and direction on the map are estimates. Tilt may default to a typical value when it cannot be detected. Suggested size uses ~165 W/m² and 72% usable roof area. Panel count assumes 1.9×1.0 m, 450 W modules, packed by footprint using the same usable roof %. All values are guides, not a measured survey.
Typical UK pitched roofs are often around 30–40°.
Values below were suggested from the map step — adjust if needed.
Range 10–18%. Add site shading below — not a measured survey.
Effective total loss: 14%
Capped at 30% for the calculator. Very heavy shade may reduce output more than this model shows.
Adjust these to match your bill or smart meter — figures are illustrative only.
Fine-tune export & usage
Export / SEG price and self-consumption use typical default values. Turn on the option above to edit them.
Without a battery, many homes use roughly 30–50% of what they generate on site.
Estimated annual savings
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Based on your import/export prices and self-consumption.
Estimated generation
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What we used in the model
Monthly generation (kWh) — long-run average for your settings.
| Month | kWh |
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Important: This is not financial advice. Shading, roof condition, equipment, and how you use electricity will change real results. For a firm quote, book a survey.