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 Ireland show a clear southeast-to-northwest gradient. Counties in the southeast (Wexford, Waterford, Kilkenny) receive 10–15% more solar energy than northwestern counties (Donegal, Leitrim). However, the difference in electricity output is modest — a 4kWp system generates 3,400 kWh in the northwest vs 3,800 kWh in the southeast. Solar panels are worthwhile across all of Ireland.
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 Ireland?
Solar resource maps for Ireland show a clear southeast-to-northwest gradient. Counties in the southeast (Wexford, Waterford, Kilkenny) receive 10–15% more solar energy than northwestern counties (Donegal, Leitrim). However, the difference in electricity output is modest — a 4kWp system generates 3,400 kWh in the northwest vs 3,800 kWh in the southeast. Solar panels are worthwhile across all of Ireland.
Frequently Asked Questions
Where in Ireland is best for solar panels?
The southeast (Wexford, Waterford, Kilkenny) has the highest solar resource. But the difference is only 10–15%, so solar panels perform well everywhere in Ireland.
Related Guides
John Rooney is the founder of Solar Info and has been covering the Irish solar energy market since 2023. He fact-checks all content against official SEAI data and maintains relationships with SEAI-registered installers across Ireland.