Written for UK homeowners and checked against official or established independent sources where applicable. It is general information, not a substitute for a property assessment.
Rooftop solar can reduce the amount of electricity a home needs to buy from the grid, but there is no universal annual saving. A reliable estimate needs a few specific details.
Generation is not the same as use
Solar produces electricity in daylight, while many households use more electricity in the evening. The share you use directly can make a big difference to the value of a system.
Roof conditions matter
Direction, pitch, size and shading affect output. A west-facing roof may still be useful, but performance should be modelled rather than assumed.
Export payments
Eligible exported electricity may receive a payment through a supplier export tariff or Smart Export Guarantee arrangement. Rates vary and must be checked with a supplier.
Payback is an estimate
Quotes should set out capital cost, likely output, consumption assumptions and tariff rates. Check what happens if prices or your usage change.
Reliable information
These are general UK homeowner considerations, not a quote, technical design or funding decision. For current rules, see the official or independent guidance for this topic. The right answer depends on your property and the latest scheme conditions.
General educational information, reviewed 11 October 2026. Not a property survey, technical recommendation, financial forecast or guarantee of funding. Rules, tariff rates and technology costs can change.
