How Much Solar Electricity Could My Roof Generate?

“How much solar electricity could my roof generate?” is a better starting question than choosing a panel count from a brochure. The answer depends on the usable roof area and how much daylight the proposed panels can capture over a year.

Roof layout matters

A large roof does not necessarily mean a large solar array. Chimneys, roof windows, edges and shaded sections reduce the space available for panels. Roof direction also affects when and how much electricity is produced. A south-facing area may have a different output pattern from an east- or west-facing area, while nearby trees or buildings may affect either.

Generation is not the same as bill savings

An annual generation estimate is measured in kilowatt-hours (kWh). It tells you how much electricity the proposed panels might produce in a typical year, not exactly how much money you will save. The financial result also depends on when your household uses electricity, how much can be stored in the package’s battery, your tariff and any export payments. Weather and actual use will vary.

See an estimate for your own address

Oxford Green Energy’s online tool uses your address to suggest a roof layout and show estimated annual generation alongside an indicative installed price and potential bill savings. You can review the proposed roof outline and adjust it if imagery has missed a detail.

The result is a starting estimate. A free home survey checks the real roof, access and wiring before a final design and quotation are confirmed. There is no obligation to proceed.

Use the button below to explore your roof’s potential.