Average Solar Panel Output UK

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.