Solar Panels in Crolly, Co. Donegal
Crolly is a village in Co. Donegal with a population of around 400. Located 34.5 km from Letterkenny, the area has a solar yield of 702 kWh/kWp. A 4kWp solar system generates approximately 2,808 kWh annually, saving an estimated €842+ per year. The SEAI grant of up to €1,800 and 0% VAT bring the net cost to €3,200–€6,200.
Solar energy output for Crolly, Co. Donegal
| Solar Metric | Value |
|---|---|
| Solar Yield | 702 kWh/kWp |
| 4kWp System Output | 2,808 kWh/yr |
| Sunshine Hours | 1,175 hrs/yr |
| Est. Annual Savings | €842+ |
| Household Coverage | 67% of avg use |
Solar yield calculated for Crolly (55.02°N, 8.26°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Monthly Solar Output in Crolly
kWh per month (4kWp system)
Crolly at a Glance
| Area Data | Value |
|---|---|
| Population | 400 (Census 2022) |
| Elevation | 16 metres |
| Eircode Area | F92 |
| Dist. to Letterkenny | 34.5 km |
| Location | Inland |
| Coordinates | 55.0250°N, 8.2608°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Finner, 59.1 km).
Weather & Climate in Crolly
Weather data from Met Eireann (Finner station, 59.1 km from Crolly). 5-year average (2019–2023).
Crolly: Local Solar Energy Profile
Crolly is a village in Co. Donegal with a population of 400 (CSO Census 2022). It is accessible from Letterkenny (34.5 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Crolly is F92. You'll need your full Eircode when applying for the SEAI grant. Based on satellite data for this location, a 4kWp solar system generates approximately 2,808 kWh per year (702 kWh/kWp). The area has higher rainfall (1246 mm/yr), with a mean temperature of 10.4°C.
How solar panels pay off in Crolly
Save on Electricity Bills
Homeowners in Crolly can save an estimated €842+ per year on electricity with a 4kWp solar system generating 3,268 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.
Energy Independence
For homes in rural Crolly, solar panels provide energy security and reduced reliance on the grid. Combined with a battery, you can store power for evening use.
25+ Year Lifespan
A system installed in Crolly today will generate clean electricity for 25-30 years with minimal maintenance.
What SEAI grants can Crolly homeowners claim?
Homeowners in Crolly, Co. Donegal 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 Donegal
SEAI registered solar panel installers covering Donegal.
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Common Questions About Going Solar in Crolly
How much do solar panels cost in Crolly?
A 4kWp system in Crolly 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 3,268 kWh/year, paying for itself in 4-6 years.
Can I get solar panels on an east or west facing roof in Crolly?
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 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.
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.
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.
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.
Are solar panels worth it in Crolly?
Yes. With estimated savings of €842+ per year, the €1,800 SEAI grant, 0% VAT, and export income of 15-25c/kWh, a solar system in Crolly 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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