What is Solar Resource Map?
A map showing solar energy potential across different regions, used to estimate panel output by location.
Quick Answer
Solar resource maps for the UK show a clear south-to-north gradient. The south coast receives 10–20% more solar energy than Scotland and northern England. However, the difference in electricity output is modest — a 4kWp system generates 3,200 kWh in the north vs 3,800 kWh in the south. Solar panels are worthwhile across all of the UK.
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
Solar Resource Map Explained
A solar resource map (or solar irradiance map) is a geographic visualisation showing the amount of solar energy available in different areas. These maps are created using satellite data, ground measurements, and meteorological models. They help homeowners, installers, and planners estimate the expected output of solar installations based on location. Solar maps typically show annual or monthly irradiance in kWh/m².
How Does Solar Resource Map Work in the UK?
Solar resource maps for the UK show a clear south-to-north gradient. The south coast receives 10–20% more solar energy than Scotland and northern England. However, the difference in electricity output is modest — a 4kWp system generates 3,200 kWh in the north vs 3,800 kWh in the south. Solar panels are worthwhile across all of the UK.
Frequently Asked Questions
Where in the UK is best for solar panels?
The south coast has the highest solar resource. But the difference is only 10–20%, so solar panels perform well everywhere in the UK.
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John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He fact-checks all content against official MCS and Ofgem data and maintains relationships with MCS-certified installers across the UK.