How much does a solar panel produce per day UK?

A 400W panel averages 1.0-1.2 kWh per day across the year. In summer: 2.0-2.5 kWh/day. In winter: 0.2-0.4 kWh/day.

Does UK output vary by region?

By about 20% between the sunniest (south-west England) and least sunny (northern Scotland) areas. This affects payback by 1-2 years but solar is viable everywhere.

Average Solar Panel Output UK

By Home Solar Guide Team|Updated 18 March 2026|educational

Independently written | Evidence-based | Sources cited

Average UK solar output data — UK average: 1,000 kWh per kWp per year. Southern England slightly more, Scotland slightly less.

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What is the average solar panel output in the UK?

The average UK solar panel output is 950-1,050 kWh per kWp installed per year for a south-facing roof at 30-40 degree tilt. A 4kW system generates approximately 3,800-4,200 kWh annually. Regional variation: southern England +5-10%, northern Scotland -10-15%, with the rest of the UK falling between. These averages already account for UK weather including cloud cover, rain, and seasonal variation. Your installer uses PVGIS data for your specific postcode to estimate output.