Solar Panels in Carnacon, Co. Mayo
Carnacon is a small town in Co. Mayo with a population of around 500. Located 6.1 km from Castlebar, the area has a solar yield of 756 kWh/kWp. A 4kWp solar system generates approximately 3,024 kWh annually, saving an estimated €907+ per year. The SEAI grant of up to €1,800 and 0% VAT bring the net cost to €3,200–€6,200.
How productive are solar panels in Carnacon?
| Solar Metric | Value |
|---|---|
| Solar Yield | 756 kWh/kWp |
| 4kWp System Output | 3,024 kWh/yr |
| Sunshine Hours | 1,105 hrs/yr |
| Est. Annual Savings | €907+ |
| Household Coverage | 72% of avg use |
Solar yield calculated for Carnacon (53.73°N, 9.22°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Monthly Solar Output in Carnacon
kWh per month (4kWp system)
Carnacon at a Glance
| Area Data | Value |
|---|---|
| Population | 500 (Census 2022) |
| Elevation | 27 metres |
| Eircode Area | F31 |
| Dist. to Castlebar | 6.1 km |
| Location | Inland |
| Coordinates | 53.7315°N, 9.2206°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Claremorris, 15.1 km).
Weather & Climate in Carnacon
Weather data from Met Eireann (Claremorris station, 15.1 km from Carnacon). 5-year average (2019–2023).
About Solar Energy in Carnacon
Carnacon is a small town in Co. Mayo with a population of 500 (CSO Census 2022). It is conveniently close to Castlebar (6.1 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Carnacon is F31. 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 3,024 kWh per year (756 kWh/kWp). The area has higher rainfall (1376 mm/yr), with a mean temperature of 10°C.
Benefits of Solar Panels in Carnacon
Save on Electricity Bills
Homeowners in Carnacon can save an estimated €907+ 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 Carnacon today will generate clean electricity for 25-30 years with minimal maintenance.
Government Support for Solar in Carnacon
Homeowners in Carnacon, Co. Mayo 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.
304 SEAI-registered solar installers serve Carnacon, Co. Mayo. Compare installers in Mayo or read verified reviews.
Solar Installers in Mayo
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What Carnacon homeowners ask about solar
How much do solar panels cost in Carnacon?
A 4kWp system in Carnacon 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.
What roof direction is best for solar panels in Carnacon?
South-facing roofs produce the most electricity (100% of potential). South-east and south-west roofs produce around 95%. East or west-facing roofs still produce 80-85%. North-facing roofs are generally not recommended for solar panels in Ireland.
Do solar panels work in winter in Mayo?
Yes, solar panels generate electricity all year round. While output is lower in winter, Mayo still receives usable daylight hours even in December. Annual generation figures (3,364 kWh for a 4kWp system) already account for seasonal variation.
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.
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.
What size solar system do I need for my home in Carnacon?
Most homes in Carnacon benefit from a 3-6 kWp system. A 4kWp system (10 panels) covers 72% of average household electricity use. Your installer will assess your roof space, orientation, and energy usage to recommend the optimal size.
How does shading affect solar panels in Carnacon?
Shading from trees, chimneys, or nearby buildings can reduce output significantly. Modern systems use optimisers or microinverters so that shading on one panel doesn't drag down the whole system. Your installer will assess shading during the 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: April 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
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