Co. Offaly had the highest percentage increase in installations (45.8%), followed by Mayo (42.4%), Meath (40.2%) and Kerry (36.5%). 

The counties with the most installations in total were Dublin with 6,391, Cork with 3,269 and Galway with 1,929.

Monaghan bucked the national trend, and was the only county to record a decrease (-1) in grants awarded for new solar arrays at the end of 2024.

Co. Cavan has one of the lowest solar adoption rates per capita in Ireland, but there were promising signs in 2024 with a 21.7% increase in solar panel systems being installed., slightly below the national average of 24%. A total of 393 solar installations were carried out in the county in 2024 compared to 316 in 2023, representing an increase of 77.

2024 saw a 21.1% increase in solar panel installations in Co. Clare – again, slightly below the national average percentage increase. 948 solar PV installations were carried out in the Banner County in 2024, compared to 767 in 2023. This represents an increase of 181 installations in 2024.

Homes in Cork have embraced solar energy over the past two years. 2024 saw a 15% increase in installations in the Rebel County, slightly below the national average. A total of 3,269 solar PV installations were carried out in the Rebel County in 2024, compared to 2804 – an increase of 465 solar energy systems.

There was a 24% increase in solar installations in Donegal in 2024, with 156 more installations than 2023. A total of 731 households in the Hills availed of solar grants to have solar panels fitted on their homes in 2024, compared to 575 the previous year. If the rate of increase continues, 2025 could see over 900 homes in the county install a solar PV system.

Dublin has a low solar adoption rate per capita, however installations are still being carried out in the county, with a 20% rise in solar in 2024. While this is below the national average, it is the largest increase in terms of actual installations (1,165). This represented 18% of national increase last year.

2024 was a great year for solar energy installations in Galway, with an increase of 30% on the year before. Some 1,929 solar arrays were fitted on homes in the county, 503 more than the previous year. If the changes to the solar grant don’t have a detrimental affect on numbers, 2025 should see well over 2,000 solar installations in Galway.

Kerry had one of the largest percentage increases for solar panels in 2024 with a whopping 36% rise in installations in the county. 976 households received a grant from the SEAI to have solar panels installed in The Kingdom in 2024 – 301 more than 2023 when there were 675 installations.

A total of 1,501 solar PV installations were carried out in Kildare in 2024, the fourth highest number in the country. 323 more solar arrays were fitted in Co. Kildare last year compared to 2023 (+24%).

Co. Kilkenny saw a 22% increase in solar panel installations with SEAI grant assistance in 2024 – an increase of 133 solar systems on 2023 figures. 684 PV arrays were installed last year in the county, up by 133 on the previous year. The county has one of the highest solar adoption rates per capita.

Laois households installed solar panels on their rooftops in their droves last year, with a total of 526 installations carried out over the course of the year. It was an increase of 154, or 34% from 2023 when there were 372 solar arrays fitted in Co. Laois.

Leitrim has one of the lowest overall installation rates in Ireland as well as one of the lowest rates of solar uptake per capita. However, there was a 20% increase in the number of homes that adopted solar in 2024. A total of 169 solar panel systems with grant support were installed in the county last year, an increase of 31 (+20%) from 2023.

The number of installations in Limerick surpassed the 1,000 mark for the first time last year, as homes in the treaty county availed of the €2,100 grant for PV panels to cut their energy bills. A total of 1,170 arrays of solar panels were installed in the Treaty County in 2024, an increase of 27% from the previous year.

Longford was one of only two counties with fewer than 200 installations in 2024, and the adoption rate per capita is one of the lowest in Ireland. However, the percentage increase from 2023 in Co. Longford was substantial at 36%. 55 more solar arrays were installed in the county last year, taking the overall figure to 181, up from 126 in 2023.

At the other end of the scale, Louth has among the highest PV panel uptake rates in the country per capita, and 2024 was another record year for solar in Co. Louth, with a 35% increase in installations. There were 984 arrays of solar panels fitted in the county in 2024, with 2025 promising to break the 1,000 mark. 

Co. Mayo saw the second highest percentage increase in solar panels being installed in 2024 in Ireland at 42% – one of only three counties where there was a rise of over 40%. A total of 835 grants were awarded for solar panel systems to be installed in Mayo in 2024, an increase of 292 from 2023.

Meath has consistently had the highest rate of solar panel adoption per capita in the country, and there was no let up in demand for solar energy in 2024, with the 3rd highest percentage increase at 40%. There were 1,789 installations carried out in the Royal County last year, up by 599 from 2023.

Monaghan was the only county in Ireland to see a decrease in the total number of solar panel grants awarded in 2024 – with one less installation than 2023. There were 257 installations in the county last year.

Offaly had the highest percentage increase of all counties, at 46%. The installation figure jumped from 313 in 2023 to 499 in 2024 – a stellar year for solar energy in the county as households flocked to their local solar installers to have panels fitted.

There were 67 more PV installations in Co. Roscommon in 2024 compared to 2023, with a total of 419 last year. This represented an increase of 17% – which was one of the lower figures recorded in the end of year SEAI data.

Sligo had the second smallest increase in solar adoption in 2024 compared to 2023, at just 14%. The number of new solar PV panel systems in the county went from 370 in 2023 to 424 in 2024, an increase of 54.

Over 1,000 homes installed solar panels in Tipperary in 2024, with the county recording a 39% increase in installations. The final figure for the county was 1,053 at the end of the year, and 2025 could be another record year for solar in the county if the trend continues.

There was an 18% increase in solar arrays in Waterford last year – up from 635 in 2023 to 762 in 2024. Met Éireann data shows Waterford is one of the sunniest counties in Ireland, meaning households in the county can generate more free electricity from solar than other counties.

Westmeath saw 547 new solar panel systems installed in 2024, an increase of 92 from 2023. This was an 18% increase in installations, which was below the national average increase for solar adoption last year which was 25%.

2024 was a great year for solar in Wexford, with more homes than ever before having panels fitted on their rooftops – surpassing 1,000 installations for the first time. A total of 1,160 installations with SEAI grant support were carried out in the county, a 29% increase (296 more solar arrays) on 2023 figures.

Wicklow had the second lowest percentage increase in solar installations in 2024, however there were over 1,000 installations for the second year in a row in the county and a 13% rise compared to 2023. Overall, there were 1,157 solar systems installed in the county in 2024 – 141 more than the previous year.