Solar Panels in Rathmullan, Co. Donegal
Rathmullan is a small town in Co. Donegal with a population of around 528. Located 19.7 km from Letterkenny, the area has a solar yield of 817 kWh/kWp. A 4kWp solar system generates approximately 3,268 kWh annually, saving an estimated €980+ per year. The SEAI grant of up to €1,800 and 0% VAT bring the net cost to €3,200–€6,200.
What is the solar potential in Rathmullan?
| Solar Metric | Value |
|---|---|
| Solar Yield | 817 kWh/kWp |
| 4kWp System Output | 3,268 kWh/yr |
| Sunshine Hours | 1,175 hrs/yr |
| Est. Annual Savings | €980+ |
| Household Coverage | 78% of avg use |
Based on county-level solar data for Donegal. Actual output varies by roof orientation, shading, and system specification.
Rathmullan at a Glance
| Area Data | Value |
|---|---|
| Population | 528 (Census 2022) |
| Households | 210 |
| Houses/Bungalows | 98% of dwellings |
| Owner-Occupied | 62% |
| Built Before 2000 | 71% |
| Avg. Rooms per Home | 5.7 |
| Elevation | 13 metres |
| Eircode Area | F92 |
| Dist. to Letterkenny | 19.7 km |
| Location | Inland |
| Coordinates | 55.0939°N, 7.5403°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Malin Head, 33.5 km).
Weather & Climate in Rathmullan
Weather data from Met Eireann (Malin Head station, 33.5 km from Rathmullan). 5-year average (2019–2023).
Solar Suitability in Rathmullan
98% of dwellings in Rathmullan are houses or bungalows, making the area highly suited for rooftop solar panels. 62% of homes are owner-occupied — homeowners can apply directly for the SEAI grant. 71% of homes were built before 2000, qualifying for the SEAI solar grant (homes built and occupied before 2021 are eligible).
Solar Power in Rathmullan, Co. Donegal
Rathmullan is a small town in Co. Donegal with a population of 528 (CSO Census 2022). It is a short drive from Letterkenny (19.7 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Rathmullan is F92. You'll need your full Eircode when applying for the SEAI grant. According to the 2022 Census, Rathmullan has 210 households, of which 98% are houses or bungalows — well suited for rooftop solar panels. The area receives around 1,175 sunshine hours annually, allowing a 4kWp solar system to generate approximately 3,268 kWh per year. The area has moderate rainfall (1191 mm/yr), with a mean temperature of 10.3°C.
Advantages of Solar Energy for Rathmullan Homeowners
Save on Electricity Bills
Homeowners in Rathmullan can save an estimated €980+ 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.
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 Rathmullan today will generate clean electricity for 25-30 years with minimal maintenance.
Solar grants available in Rathmullan
Homeowners in Rathmullan, 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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Your solar questions for Rathmullan
How much do solar panels cost in Rathmullan?
A 4kWp system in Rathmullan 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.
How much electricity will solar panels generate in Rathmullan?
Based on Donegal county data, a 4kWp system in Rathmullan generates approximately 3,268 kWh per year, covering 78% of average household use (4,200 kWh/year). Donegal receives around 1,175 sunshine hours annually.
Can I get solar panels on an east or west facing roof in Rathmullan?
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.
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.
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.
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.
Is my roof suitable for solar panels in Rathmullan?
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.
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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