Solar Panel Cost Calculator
Estimate the cost, annual saving and payback period for a home solar PV system, with or without a battery, using indicative UK installer pricing.
Estimate only. This is an indicative estimate, not a quote. Actual costs, generation and savings depend on your property, usage and tariff, get quotes from MCS-certified installers before committing.
Enter your system details
Your estimated generation, annual saving and payback period appear here as you type.
How solar panel savings are estimated
A UK solar PV system generates roughly 950 kWh per year for every kWp installed on a well-sited, south-facing roof, panels facing east/west or split SE/SW generate somewhat less. Electricity you use as it's generated (self-consumption) saves you the full import rate; anything you don't use is exported to the grid and paid at the Smart Export Guarantee (SEG) rate, which is normally lower. A battery lets you store daytime generation to use in the evening, which typically raises self-consumption from around 40% to 70% or more, at an extra upfront cost. Payback is simply the total system cost divided by the annual saving; the 25-year figure assumes today's rates stay flat and ignores gradual panel degradation, so treat both as a rough guide, not a guarantee.
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