Solar Panels in Castlemaine, Co. Kerry
Castlemaine is a village in Co. Kerry with a population of around 177. Located 11.4 km from Killarney, the area has a solar yield of 765 kWh/kWp. A 4kWp solar system generates approximately 3,060 kWh annually, saving an estimated €918+ per year. The SEAI grant of up to €1,800 and 0% VAT bring the net cost to €3,200–€6,200.
Castlemaine solar irradiance and generation figures
| Solar Metric | Value |
|---|---|
| Solar Yield | 765 kWh/kWp |
| 4kWp System Output | 3,060 kWh/yr |
| Sunshine Hours | 1,246 hrs/yr |
| Est. Annual Savings | €918+ |
| Household Coverage | 73% of avg use |
Solar yield calculated for Castlemaine (52.17°N, 9.70°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Monthly Solar Output in Castlemaine
kWh per month (4kWp system)
Castlemaine at a Glance
| Area Data | Value |
|---|---|
| Population | 177 (Census 2022) |
| Households | 79 |
| Houses/Bungalows | 100% of dwellings |
| Owner-Occupied | 68% |
| Built Before 2000 | 58% |
| Avg. Rooms per Home | 5.4 |
| Elevation | 3 metres |
| Eircode Area | V92 |
| Dist. to Killarney | 11.4 km |
| Location | Inland |
| Coordinates | 52.1686°N, 9.7012°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Valentia Observatory, 44.9 km).
Weather & Climate in Castlemaine
Weather data from Met Eireann (Valentia Observatory station, 44.9 km from Castlemaine). 5-year average (2019–2023).
Solar Suitability in Castlemaine
100% of dwellings in Castlemaine are houses or bungalows, making the area highly suited for rooftop solar panels. 68% of homes are owner-occupied — homeowners can apply directly for the SEAI grant. 58% of homes were built before 2000, qualifying for the SEAI solar grant (homes built and occupied before 2021 are eligible).
Renewable Energy Potential in Castlemaine
Castlemaine is a village in Co. Kerry with a population of 177 (CSO Census 2022). It is a short drive from Killarney (11.4 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Castlemaine is V92. You'll need your full Eircode when applying for the SEAI grant. According to the 2022 Census, Castlemaine has 79 households, of which 100% are houses or bungalows — well suited for rooftop solar panels. Based on satellite data for this location, a 4kWp solar system generates approximately 3,060 kWh per year (765 kWh/kWp). The area has higher rainfall (1763 mm/yr), with a mean temperature of 11.3°C.
Why Go Solar in Castlemaine?
Save on Electricity Bills
Homeowners in Castlemaine can save an estimated €918+ per year on electricity with a 4kWp solar system generating 3,584 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. Kerry ranks #8 in Ireland for solar yield with 896 kWh/kWp. Homes in Castlemaine benefit from some of the best solar conditions in the country.
25+ Year Lifespan
A system installed in Castlemaine today will generate clean electricity for 25-30 years with minimal maintenance.
SEAI Solar Grant for Castlemaine Residents
Homeowners in Castlemaine, Co. Kerry 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 Kerry
SEAI registered solar panel installers covering Kerry.
Top Rated Solar Installers Near Castlemaine
Read verified reviews from solar panel installers serving Castlemaine, Co. Kerry.
Nearby Towns Also Served
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Castlemaine solar panel questions answered
How much do solar panels cost in Castlemaine?
A 4kWp system in Castlemaine 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 3,584 kWh/year, paying for itself in 4-6 years.
How do I get the SEAI grant in Castlemaine?
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 Kerry?
Yes, solar panels generate electricity all year round. While output is lower in winter, Kerry still receives usable daylight hours even in December. Annual generation figures (3,584 kWh for a 4kWp system) already account for seasonal variation.
What is the Microgeneration Support Scheme?
The Microgeneration Support Scheme allows homeowners to sell surplus solar electricity back to the grid at 15-25c/kWh. You need a smart meter (free from ESB Networks) and a grid-connected system. The first €400/year of export income is tax-free.
Is my roof suitable for solar panels in Castlemaine?
Most roofs are suitable. You need at least 15-20 m² of unshaded roof space for a typical 4kWp system (10 panels). South, east, or west-facing roofs work well. Your installer will assess your roof's orientation, angle, and structural suitability during a site survey.
What maintenance do solar panels need?
Solar panels need very little maintenance. Rain keeps them clean in most cases. There are no moving parts. Your inverter may need replacing once in 25 years (10-15 year lifespan). Annual visual checks and occasional cleaning if near trees is all that's needed.
How does shading affect solar panels in Castlemaine?
Shading from trees, chimneys, or nearby buildings can reduce output significantly. Modern systems use optimisers or microinverters so that shading on one panel doesn't drag down the whole system. Your installer will assess shading during the site survey.
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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