Solar Panels in Castlerea, Co. Roscommon
Castlerea, Co. Roscommon, has a solar yield of 756 kWh/kWp (ideal conditions for solar energy). A 4kWp system generates approximately 3,024 kWh annually, covering 72% of average household electricity use and saving an estimated €907+ per year. With the SEAI grant of up to €1,800 and 0% VAT, the net cost is €3,200–€6,200 with payback in 4–6 years.
Castlerea solar yield and performance data
| Solar Metric | Value |
|---|---|
| Solar Yield | 756 kWh/kWp |
| 4kWp System Output | 3,024 kWh/yr |
| Sunshine Hours | 1,200 hrs/yr |
| Est. Annual Savings | €907+ |
| Household Coverage | 72% of avg use |
Solar yield calculated for Castlerea (53.76°N, 8.49°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Monthly Solar Output in Castlerea
kWh per month (4kWp system)
Castlerea at a Glance
| Area Data | Value |
|---|---|
| Population | 2,348 (Census 2022) |
| Households | 987 |
| Houses/Bungalows | 89% of dwellings |
| Owner-Occupied | 50% |
| Built Before 2000 | 58% |
| Avg. Rooms per Home | 5 |
| Elevation | 67 metres |
| Eircode Area | F45 |
| Dist. to Roscommon | 24.6 km |
| Location | Inland |
| Coordinates | 53.7616°N, 8.4858°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Knock Airport, 27 km).
Weather & Climate in Castlerea
Weather data from Met Eireann (Knock Airport station, 27 km from Castlerea). 5-year average (2019–2023).
Solar Suitability in Castlerea
89% of dwellings in Castlerea are houses or bungalows, making the area highly suited for rooftop solar panels. 50% 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).
Going Solar in Castlerea
Castlerea is a town in Co. Roscommon with a population of 2,348 (CSO Census 2022). It is a short drive from Roscommon (24.6 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Castlerea is F45. You'll need your full Eircode when applying for the SEAI grant. According to the 2022 Census, Castlerea has 987 households, of which 89% are houses or bungalows — well suited for rooftop solar panels. Based on satellite data for this location, a 4kWp solar system generates approximately 3,024 kWh per year (756 kWh/kWp). The area has higher rainfall (1447 mm/yr), with a mean temperature of 9.3°C.
Solar panel benefits in Castlerea, Roscommon
Save on Electricity Bills
Homeowners in Castlerea can save an estimated €907+ per year on electricity with a 4kWp solar system generating 3,468 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.
Increase Property Value
Solar panels improve your BER rating and can add up to 4% to your property value.
25+ Year Lifespan
A system installed in Castlerea today will generate clean electricity for 25-30 years with minimal maintenance.
Castlerea SEAI solar PV grant details
Homeowners in Castlerea, Co. Roscommon 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 Roscommon
SEAI registered solar panel installers covering Roscommon.
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Solar Panel FAQs for Castlerea
How much do solar panels cost in Castlerea?
A 4kWp system in Castlerea 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 3,468 kWh/year, paying for itself in 4-6 years.
What is the payback period for solar panels in Castlerea?
With a net cost of €3,200-€6,200 after the SEAI grant and savings of €907+ per year plus export income, a typical solar system in Castlerea pays for itself in 4-6 years. After payback, you get 20+ years of near-free electricity.
What is a BER assessment and do I need one?
A Building Energy Rating (BER) assessment is required after installing solar panels to claim the SEAI grant. A BER assessor visits your home and rates its energy efficiency from A1 to G. Solar panels typically improve your BER by 1-2 grades. The assessment costs around €150-€200.
Can I get solar panels on an east or west facing roof in Castlerea?
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.
Is my roof suitable for solar panels in Castlerea?
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.
How much electricity will solar panels generate in Castlerea?
Based on Roscommon county data, a 4kWp system in Castlerea generates approximately 3,468 kWh per year, covering 72% of average household use (4,200 kWh/year). Roscommon receives around 1,200 sunshine hours annually.
Are solar panels worth it in Castlerea?
Yes. With estimated savings of €907+ per year, the €1,800 SEAI grant, 0% VAT, and export income of 15-25c/kWh, a solar system in Castlerea pays for itself in 4-6 years and lasts 25+ years.
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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