Solar Panels in Letterkenny, Co. Donegal
Letterkenny is one of the larger towns in Co. Donegal with a population of 22,549. With 1,175+ sunshine hours per year, solar energy is a strong investment for homeowners here. A typical 4kWp system generates approximately 3,268 kWh annually — covering 78% of average household electricity use. After 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.
What is the solar potential in Letterkenny?
Solar Yield
4kWp Output
Sunshine
Est. Savings
Household Coverage
Population
Eircode Area
Dist. to Letterkenny
Location
Based on county-level solar data for Donegal. Actual output varies by roof orientation, shading, and system specification.
About Solar Energy in Letterkenny
Letterkenny is a large town in Co. Donegal with a population of 22,549 (CSO Census 2022). It is conveniently close to Letterkenny (0.5 km), where most SEAI-registered installers in the county are based. Letterkenny's coastal position means good exposure to sunlight, though installations should account for higher wind loads and salt air. The Eircode routing key for Letterkenny is F94 — you'll need your full Eircode when applying for the SEAI grant.
Benefits of Solar Panels in Letterkenny
Save on Electricity Bills
Homeowners in Letterkenny 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.
Coastal Location Advantage
Letterkenny's coastal position often means fewer obstructions and clearer horizons for solar exposure. Modern panels are designed to withstand coastal conditions including salt air.
25+ Year Lifespan
A system installed in Letterkenny today will generate clean electricity for 25-30 years with minimal maintenance.
Government Support for Solar in Letterkenny
Homeowners in Letterkenny, 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.
Where can you find solar installers near Letterkenny?
Also serving nearby areas in Donegal:
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Solar Panel FAQs for Letterkenny
How much do solar panels cost in Letterkenny?
A 4kWp system in Letterkenny 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 Letterkenny?
Based on Donegal county data, a 4kWp system in Letterkenny 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.
Are solar panels worth it in Letterkenny?
Yes. With estimated savings of €980+ per year, the €1,800 SEAI grant, 0% VAT, and export income of 15-25c/kWh, a solar system in Letterkenny pays for itself in 4-6 years and lasts 25+ years.
Do solar panels increase property value in Letterkenny?
Yes. Solar panels improve your BER rating and can increase property value by up to 4%. Buyers increasingly look for energy-efficient homes with lower running costs. A solar system in Letterkenny is a long-term investment in your property.
What size solar system do I need for my home in Letterkenny?
Most homes in Letterkenny benefit from a 3-6 kWp system. A 4kWp system (10 panels) covers 78% of average household electricity use. Your installer will assess your roof space, orientation, and energy usage to recommend the optimal size.
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.
Sources
Last updated: February 2026
Reviewed by the Solar Info editorial team. Editorial policy
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