Solar Panels in Greencastle, Co. Donegal
Greencastle is a small town in Co. Donegal with a population of around 1,268. Located 55.3 km from Letterkenny, the area receives 1,175+ sunshine hours per year. 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.
How much solar energy can you generate in Greencastle?
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.
Solar Power in Greencastle, Co. Donegal
Greencastle is a small town in Co. Donegal with a population of 1,268 (CSO Census 2022). It is located away from Letterkenny (55.3 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Greencastle is F94 — you'll need your full Eircode when applying for the SEAI grant.
Advantages of Solar Energy for Greencastle Homeowners
Save on Electricity Bills
Homeowners in Greencastle 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.
Energy Independence
For homes in rural Greencastle, 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 Greencastle today will generate clean electricity for 25-30 years with minimal maintenance.
What SEAI grants can Greencastle homeowners claim?
Homeowners in Greencastle, 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.
Solar Panels in Areas Near Greencastle
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Common Questions About Going Solar in Greencastle
How much do solar panels cost in Greencastle?
A 4kWp system in Greencastle 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 Greencastle?
Based on Donegal county data, a 4kWp system in Greencastle 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 Greencastle?
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 Greencastle pays for itself in 4-6 years and lasts 25+ years.
Do solar panels increase property value in Greencastle?
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 Greencastle is a long-term investment in your property.
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.
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.
Sources
Last updated: February 2026
Reviewed by the Solar Info editorial team. Editorial policy
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