Solar Panels in Castleisland, Co. Kerry
Castleisland, Co. Kerry, has a solar yield of 896 kWh/kWp (among the highest in Ireland). A 4kWp system generates approximately 3,584 kWh annually, covering 85% of average household electricity use and saving an estimated €1075+ per year. With the SEAI grant of up to €1,800 and 0% VAT, the net cost is €6,500–€7,200 with payback in 4–6 years.
Solar energy output for Castleisland, Co. Kerry
| Solar Metric | Value |
|---|---|
| Solar Yield | 896 kWh/kWp |
| 4kWp System Output | 3,584 kWh/yr |
| Sunshine Hours | 1,246 hrs/yr |
| Est. Annual Savings | €1075+ |
| Household Coverage | 85% of avg use |
Based on county-level solar data for Kerry. Actual output varies by roof orientation, shading, and system specification.
Castleisland at a Glance
| Area Data | Value |
|---|---|
| Population | 2,536 (Census 2022) |
| Households | 1,009 |
| Houses/Bungalows | 94% of dwellings |
| Owner-Occupied | 58% |
| Built Before 2000 | 67% |
| Avg. Rooms per Home | 5.2 |
| Elevation | 28 metres |
| Eircode Area | V92 |
| Dist. to Killarney | 16.5 km |
| Location | Inland |
| Coordinates | 52.2312°N, 9.4637°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Valentia Observatory, 62.3 km).
Weather & Climate in Castleisland
Weather data from Met Eireann (Valentia Observatory station, 62.3 km from Castleisland). 5-year average (2019–2023).
Solar Suitability in Castleisland
94% of dwellings in Castleisland 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. 67% of homes were built before 2000, qualifying for the SEAI solar grant (homes built and occupied before 2021 are eligible).
Castleisland: Local Solar Energy Profile
Castleisland is a town in Co. Kerry with a population of 2,536 (CSO Census 2022). It is a short drive from Killarney (16.5 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Castleisland is V92. You'll need your full Eircode when applying for the SEAI grant. According to the 2022 Census, Castleisland has 1,009 households, of which 94% are houses or bungalows — well suited for rooftop solar panels. The area receives around 1,246 sunshine hours annually, allowing a 4kWp solar system to generate approximately 3,584 kWh per year. The area has higher rainfall (1763 mm/yr), with a mean temperature of 11.3°C.
How solar panels pay off in Castleisland
Save on Electricity Bills
Homeowners in Castleisland can save an estimated €1075+ per year on electricity with a 4kWp solar system generating 3,584 kWh annually.
Top Solar County in Ireland
Co. Kerry ranks #8 in Ireland for solar yield with 896 kWh/kWp. Homes in Castleisland benefit from some of the best solar conditions in the country.
25+ Year Lifespan
A system installed in Castleisland today will generate clean electricity for 25-30 years with minimal maintenance.
What SEAI grants can Castleisland homeowners claim?
Homeowners in Castleisland, Co. Kerry can claim up to €1,800 from the SEAI solar PV grant (2026). Combined with 0% VAT, the net cost of a 4kWp system is typically€6,500–€7,200.
289 SEAI-registered solar installers serve Castleisland, Co. Kerry. Compare installers in Kerry or read verified reviews.
Solar Installers Serving Castleisland
SEAI registered solar panel installers covering Castleisland, Co. Kerry.
Mr Sparkx Electrical Services Ltd
carlow, cavan, clare +23 more
Teddy Kelleher Electrical Ltd
carlow, cavan, clare +23 more
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Common Questions About Going Solar in Castleisland
How much do solar panels cost in Castleisland?
A 4.4 kWp system in Castleisland typically costs €8,300–€9,000 before grants. After the €1,800 SEAI grant and 0% VAT, the net cost is €6,500–€7,200. The system generates approximately 3,584 kWh/year, paying for itself in 4-6 years.
Can I sell excess solar electricity?
Yes. Under Ireland's Microgeneration Support Scheme, you sell surplus electricity at 15-25c/kWh. You need a smart meter (ESB Networks installs free). The first €400/year of export income is tax-free.
Are solar panels worth it in Castleisland?
Yes. With estimated savings of €1075+ per year, the €1,800 SEAI grant, 0% VAT, and export income of 15-25c/kWh, a solar system in Castleisland pays for itself in 4-6 years and lasts 25+ years.
How much electricity will solar panels generate in Castleisland?
Based on Kerry county data, a 4kWp system in Castleisland generates approximately 3,584 kWh per year, covering 85% of average household use (4,200 kWh/year). Kerry receives around 1,246 sunshine hours annually.
Is my roof suitable for solar panels in Castleisland?
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.
Can I add a battery to my solar system?
Yes. A home battery (typically 5-10 kWh) stores excess solar electricity for evening use. This increases your self-consumption from around 30-40% to 60-80%. Batteries currently cost €3,000-€6,000 and are not yet covered by the SEAI grant.
Can I get solar panels on an east or west facing roof in Castleisland?
Yes. East or west-facing roofs still produce 80-85% of the output of a south-facing roof. Many installers recommend splitting panels across east and west to spread generation throughout the day, which can actually improve self-consumption.
Can you go off-grid with solar in Castleisland?
Fully off-grid setups are rare in Castleisland. Most homes stay grid-connected and sell surplus back through the Microgeneration Support Scheme. A hybrid inverter with 10-20 kWh of battery storage covers evenings and power cuts, which is what most people searching "off-grid" actually want. A true off-grid system needs a much larger array and battery bank, and you lose the grant-supported export income.
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: September 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
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