Solar Panels in Threemilehouse, Co. Monaghan
Threemilehouse is a village in Co. Monaghan with a population of around 148. Located 6.2 km from Monaghan, the area has a solar yield of 742 kWh/kWp. A 4kWp solar system generates approximately 2,968 kWh annually, saving an estimated €890+ 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 Threemilehouse, Co. Monaghan
| Solar Metric | Value |
|---|---|
| Solar Yield | 742 kWh/kWp |
| 4kWp System Output | 2,968 kWh/yr |
| Sunshine Hours | 1,200 hrs/yr |
| Est. Annual Savings | €890+ |
| Household Coverage | 71% of avg use |
Solar yield calculated for Threemilehouse (54.22°N, 7.04°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Monthly Solar Output in Threemilehouse
kWh per month (4kWp system)
Threemilehouse at a Glance
| Area Data | Value |
|---|---|
| Population | 148 (Census 2022) |
| Elevation | 84 metres |
| Eircode Area | H18 |
| Dist. to Monaghan | 6.2 km |
| Location | Inland |
| Coordinates | 54.2165°N, 7.0442°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Ballyhaise, 25.3 km).
Weather & Climate in Threemilehouse
Weather data from Met Eireann (Ballyhaise station, 25.3 km from Threemilehouse). 5-year average (2019–2023).
Threemilehouse: Local Solar Energy Profile
Threemilehouse is a village in Co. Monaghan with a population of 148 (CSO Census 2022). It is conveniently close to Monaghan (6.2 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Threemilehouse is H18. 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 2,968 kWh per year (742 kWh/kWp). The area has moderate rainfall (1102 mm/yr), with a mean temperature of 9.9°C.
How solar panels pay off in Threemilehouse
Save on Electricity Bills
Homeowners in Threemilehouse can save an estimated €890+ per year on electricity with a 4kWp solar system generating 3,364 kWh annually.
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 Threemilehouse today will generate clean electricity for 25-30 years with minimal maintenance.
What SEAI grants can Threemilehouse homeowners claim?
Homeowners in Threemilehouse, Co. Monaghan can claim up to €1,800 from the SEAI solar PV grant (2026). Combined with 0% VAT, the net cost of a 4kWp system is typically €3,200–€6,200.
271 SEAI-registered solar installers serve Threemilehouse, Co. Monaghan. Compare installers in Monaghan or read verified reviews.
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Common Questions About Going Solar in Threemilehouse
How much do solar panels cost in Threemilehouse?
A 4kWp system in Threemilehouse 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 3,364 kWh/year, paying for itself in 4-6 years.
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.
How do I get the SEAI grant in Threemilehouse?
Apply online at seai.ie with your MPRN and Eircode. Use an SEAI-registered installer. Do not start work before your Letter of Offer. After installation, complete a BER assessment. The grant is paid to your bank within 4-6 weeks.
What is the payback period for solar panels in Threemilehouse?
With a net cost of €3,200-€6,200 after the SEAI grant and savings of €890+ per year plus export income, a typical solar system in Threemilehouse pays for itself in 4-6 years. After payback, you get 20+ years of near-free electricity.
Can I get solar panels on an east or west facing roof in Threemilehouse?
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 size solar system do I need for my home in Threemilehouse?
Most homes in Threemilehouse benefit from a 3-6 kWp system. A 4kWp system (10 panels) covers 71% of average household electricity use. Your installer will assess your roof space, orientation, and energy usage to recommend the optimal size.
Do I need a smart meter for solar panels?
You need a smart meter to sell surplus electricity back to the grid. ESB Networks installs smart meters for free. Your installer submits the NC6 form to ESB Networks after installation, which triggers the meter upgrade if needed.
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: April 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
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