State of Solar in Ireland 2025
A data-driven look at Ireland's solar energy market in 2025 — covering SEAI installation trends, county-by-county performance, installer market dynamics, and customer satisfaction. All data sourced from SEAI records, PVGIS satellite measurements, and verified Google reviews.
Quick Answer
Ireland saw 33,049 SEAI-supported solar installations in 2025, with an average solar yield of 883 kWh/kWp. The installer market includes 743 active companies, 100% of which are SEAI-registered, with an average Google rating of 4.7/5.
33,049
SEAI Installs
2025 total
883
Avg kWh/kWp
National average yield
743
Active Installers
In our directory
4.7/5
Avg Google Rating
41,038 total reviews
Last updated March 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
In This Report
Solar Adoption by County
Ireland recorded 33,049 SEAI-supported residential solar installations in 2025. Dublin, Cork, and Galway led in absolute numbers, reflecting their larger populations.
All 26 Counties
| County | Region | SEAI Installs | kWh/kWp | Solar Rank |
|---|---|---|---|---|
| Dublin | Leinster | 7,044 | 915 | 4 |
| Cork | Munster | 3,603 | 907 | 6 |
| Galway | Connacht | 2,126 | 886 | 13 |
| Meath | Leinster | 1,972 | 885 | 12 |
| Limerick | Munster | 1,888 | 869 | 18 |
| Kildare | Leinster | 1,654 | 885 | 11 |
| Wexford | Leinster | 1,278 | 965 | 1 |
| Wicklow | Leinster | 1,275 | 947 | 3 |
| Tipperary | Munster | 1,161 | 884 | 14 |
| Mayo | Connacht | 1,131 | 841 | 23 |
| Louth | Leinster | 1,084 | 881 | 15 |
| Kerry | Munster | 1,076 | 896 | 8 |
| Clare | Munster | 1,045 | 888 | 9 |
| Donegal | Ulster | 881 | 817 | 26 |
| Waterford | Munster | 840 | 949 | 2 |
| Kilkenny | Leinster | 754 | 905 | 7 |
| Westmeath | Leinster | 603 | 871 | 17 |
| Laois | Leinster | 580 | 888 | 10 |
| Offaly | Leinster | 550 | 881 | 16 |
| Sligo | Connacht | 467 | 847 | 21 |
| Roscommon | Connacht | 462 | 867 | 19 |
| Carlow | Leinster | 438 | 911 | 5 |
| Cavan | Ulster | 433 | 841 | 25 |
| Monaghan | Ulster | 283 | 841 | 24 |
| Leitrim | Connacht | 222 | 842 | 22 |
| Longford | Leinster | 199 | 854 | 20 |
Solar Performance by County
Solar yield varies across Ireland from 888 to 965 kWh per kWp installed. The southeast consistently outperforms, benefiting from higher sunshine hours and lower rainfall. The national average is 883 kWh/kWp.
Installer Market Overview
Ireland's solar installer market is served by 743 active companies in our directory. Of these, 741 (100%) are SEAI-registered — a key quality indicator and requirement for grant eligibility.
743
Total Installers
100%
SEAI Registered
741 companies
41,038
Google Reviews
Across all installers
Installers by County
Customer Satisfaction
Based on 41,038 verified Google reviews across 743 installers, the average Google rating is 4.7/5. The majority of rated installers score 4.0 or above, reflecting generally high customer satisfaction in the Irish solar market.
4.7/5
Average Rating
Based on 41,038 reviews
Geographic Opportunity
Some counties have a high population relative to the number of solar installers serving them. These underserved areas represent growth opportunities for the industry. The table below shows the population-to-installer ratio — higher numbers indicate greater unmet demand.
Note: Installer counts are based on companies listed in our directory and do not represent the total market. Actual installer coverage may be higher. Population data is from CSO Census 2022.
| County | Population | Installers | People per Installer |
|---|---|---|---|
| Wicklow | 155,851 | 11 | 14,168 |
| Dublin | 1,458,154 | 139 | 10,490 |
| Cork | 584,156 | 58 | 10,072 |
| Limerick | 209,536 | 22 | 9,524 |
| Roscommon | 70,259 | 9 | 7,807 |
| Clare | 127,419 | 17 | 7,495 |
| Kilkenny | 104,160 | 14 | 7,440 |
| Sligo | 69,819 | 10 | 6,982 |
| Laois | 91,657 | 14 | 6,547 |
| Donegal | 166,321 | 27 | 6,160 |
| Louth | 139,703 | 23 | 6,074 |
| Galway | 276,451 | 46 | 6,010 |
| Longford | 46,634 | 8 | 5,829 |
| Kildare | 247,774 | 44 | 5,631 |
| Tipperary | 167,895 | 30 | 5,597 |
Key Takeaways
Strong Adoption
33,049 SEAI installations in 2025 show continued strong demand for residential solar in Ireland.
Southeast Leads on Yield
Counties in the southeast generate up to 9% more solar energy per kWp than the national average, and all counties are viable.
High SEAI Registration
100% of installers are SEAI-registered, ensuring quality standards and grant eligibility for homeowners.
Customer Satisfaction
An average Google rating of 4.7/5 across 41,038 reviews indicates high customer satisfaction in the market.
Underserved Counties
Several counties with large populations have relatively few installers, presenting growth opportunities for the industry.
Dublin Dominates Volume
Dublin leads in total installations by a significant margin, driven by population density and higher property values.
Methodology
This report draws on four primary data sources:
- SEAI Solar PV Scheme data (2025) — Official installation counts by county from the Sustainable Energy Authority of Ireland.
- PVGIS satellite data — Solar irradiance and yield estimates (kWh/kWp) from the European Commission's Photovoltaic Geographical Information System, validated against Irish weather station data.
- Solar Info installer directory — Business data, Google ratings, and review counts sourced from our verified installer database as of February 2026.
- CSO Census 2022 — County population figures from the Central Statistics Office of Ireland.
Caveats: SEAI installation data covers grant-supported installations only and does not include non-grant installs or commercial systems. Installer counts represent companies in our directory and may not capture every installer in the market. Google ratings are a snapshot and change over time.
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.