Solar Panels in Castlecomer, Co. Kilkenny
Castlecomer is a small town in Co. Kilkenny with a population of around 1,496. Located 17.1 km from Kilkenny, the area has a solar yield of 771 kWh/kWp. A 4kWp solar system generates approximately 3,084 kWh annually, saving an estimated €925+ per year. The SEAI grant of up to €1,800 and 0% VAT bring the net cost to €3,200–€6,200.
Castlecomer solar irradiance and generation figures
| Solar Metric | Value |
|---|---|
| Solar Yield | 771 kWh/kWp |
| 4kWp System Output | 3,084 kWh/yr |
| Sunshine Hours | 1,360 hrs/yr |
| Est. Annual Savings | €925+ |
| Household Coverage | 73% of avg use |
Solar yield calculated for Castlecomer (52.81°N, 7.21°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Monthly Solar Output in Castlecomer
kWh per month (4kWp system)
Castlecomer at a Glance
| Area Data | Value |
|---|---|
| Population | 1,496 (Census 2022) |
| Households | 605 |
| Houses/Bungalows | 97% of dwellings |
| Owner-Occupied | 58% |
| Built Before 2000 | 69% |
| Avg. Rooms per Home | 5.1 |
| Elevation | 125 metres |
| Eircode Area | R95 |
| Dist. to Kilkenny | 17.1 km |
| Location | Inland |
| Coordinates | 52.8061°N, 7.2106°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Oak Park, 20.8 km).
Weather & Climate in Castlecomer
Weather data from Met Eireann (Oak Park station, 20.8 km from Castlecomer). 5-year average (2019–2023).
Solar Suitability in Castlecomer
97% of dwellings in Castlecomer are houses or bungalows, making the area highly suited for rooftop solar panels. 58% of homes are owner-occupied — homeowners can apply directly for the SEAI grant. 69% of homes were built before 2000, qualifying for the SEAI solar grant (homes built and occupied before 2021 are eligible).
Renewable Energy Potential in Castlecomer
Castlecomer is a small town in Co. Kilkenny with a population of 1,496 (CSO Census 2022). It is a short drive from Kilkenny (17.1 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Castlecomer is R95. You'll need your full Eircode when applying for the SEAI grant. According to the 2022 Census, Castlecomer has 605 households, of which 97% are houses or bungalows — well suited for rooftop solar panels. Based on satellite data for this location, a 4kWp solar system generates approximately 3,084 kWh per year (771 kWh/kWp). The area has relatively low rainfall (867 mm/yr), with a mean temperature of 10.5°C.
Why Go Solar in Castlecomer?
Save on Electricity Bills
Homeowners in Castlecomer can save an estimated €925+ per year on electricity with a 4kWp solar system generating 3,620 kWh annually.
SEAI Grant: Up to €1,800
Get up to €1,800 back from SEAI. The grant is available for homes built before 2021. No means testing. Apply online at seai.ie.
0% VAT on Installation
Residential solar installations are zero-rated for VAT since May 2023, saving approximately €1,000 on a typical system.
Earn from Excess Energy
Sell surplus electricity at 15-25c/kWh through the Microgeneration Support Scheme. The first €400/year is tax-free.
Top Solar County in Ireland
Co. Kilkenny ranks #7 in Ireland for solar yield with 905 kWh/kWp. Homes in Castlecomer benefit from some of the best solar conditions in the country.
25+ Year Lifespan
A system installed in Castlecomer today will generate clean electricity for 25-30 years with minimal maintenance.
SEAI Solar Grant for Castlecomer Residents
Homeowners in Castlecomer, Co. Kilkenny can apply for the SEAI solar PV grant. The maximum grant of €1,800 is confirmed for 2026.
| System Size | Grant Amount | Typical Net Cost |
|---|---|---|
| 2 kWp | €1,400 | €2,000 - €3,000 |
| 3 kWp | €1,600 | €2,500 - €4,000 |
| 4 kWp+ | €1,800 (max) | €3,200 - €6,200 |
Solar Installers in Kilkenny
SEAI registered solar panel installers covering Kilkenny.
Top Rated Solar Installers Near Castlecomer
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Castlecomer solar panel questions answered
How much do solar panels cost in Castlecomer?
A 4kWp system in Castlecomer typically costs €5,000-€8,000 before grants. After the €1,800 SEAI grant and 0% VAT, the net cost is €3,200-€6,200. The system generates approximately 3,620 kWh/year, paying for itself in 4-6 years.
How long do solar panels last?
Modern solar panels are warrantied for 25-30 years and typically last even longer. Panel efficiency degrades by about 0.5% per year, so after 25 years, your panels will still produce around 87% of their original output. Inverters typically last 10-15 years and may need one replacement.
How do I get the SEAI grant in Castlecomer?
Apply online at seai.ie with your MPRN and Eircode. Use an SEAI-registered installer. Do not start work before your Letter of Offer. After installation, complete a BER assessment. The grant is paid to your bank within 4-6 weeks.
Do solar panels work in winter in Kilkenny?
Yes, solar panels generate electricity all year round. While output is lower in winter, Kilkenny still receives usable daylight hours even in December. Annual generation figures (3,620 kWh for a 4kWp system) already account for seasonal variation.
What happens during a power cut?
Standard grid-tied solar systems shut down during a power cut for safety reasons (to protect ESB workers). If you need backup power, you can install a hybrid inverter with battery storage that provides power during outages.
How long does solar panel installation take?
A typical residential installation takes 1-2 days. This includes scaffolding, mounting the panels, wiring, inverter installation, and connecting to the grid. Your installer handles the ESB Networks notification (NC6 form).
Do I need to clean my solar panels?
In most cases, rain keeps solar panels clean enough in Ireland. If your panels are near trees or at a low angle, an annual clean may improve output by 2-5%. Never use abrasive materials. A soft brush and water is sufficient.
Sources
- SEAI — Solar Electricity Grant
- SEAI — Find a Registered Professional
- Revenue — 0% VAT on Solar Panels
- PVGIS — EU Joint Research Centre (solar irradiance data)
- CSO — Census of Population 2022
- Met Eireann — Climate Data
Last updated: March 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
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