Solar Panels in Hollymount, Co. Mayo
Hollymount is a village in Co. Mayo with a population of around 400. Located 16.4 km from Castlebar, the area has a solar yield of 763 kWh/kWp. A 4kWp solar system generates approximately 3,052 kWh annually, saving an estimated €916+ 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 Hollymount?
| Solar Metric | Value |
|---|---|
| Solar Yield | 763 kWh/kWp |
| 4kWp System Output | 3,052 kWh/yr |
| Sunshine Hours | 1,105 hrs/yr |
| Est. Annual Savings | €916+ |
| Household Coverage | 73% of avg use |
Solar yield calculated for Hollymount (53.66°N, 9.12°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Monthly Solar Output in Hollymount
kWh per month (4kWp system)
Hollymount at a Glance
| Area Data | Value |
|---|---|
| Population | 400 (Census 2022) |
| Elevation | 36 metres |
| Eircode Area | F31 |
| Dist. to Castlebar | 16.4 km |
| Location | Inland |
| Coordinates | 53.6607°N, 9.1173°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Claremorris, 9.9 km).
Weather & Climate in Hollymount
Weather data from Met Eireann (Claremorris station, 9.9 km from Hollymount). 5-year average (2019–2023).
About Solar Energy in Hollymount
Hollymount is a village in Co. Mayo with a population of 400 (CSO Census 2022). It is a short drive from Castlebar (16.4 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Hollymount 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 3,052 kWh per year (763 kWh/kWp). The area has higher rainfall (1376 mm/yr), with a mean temperature of 10°C.
Benefits of Solar Panels in Hollymount
Save on Electricity Bills
Homeowners in Hollymount can save an estimated €916+ 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 Hollymount today will generate clean electricity for 25-30 years with minimal maintenance.
Government Support for Solar in Hollymount
Homeowners in Hollymount, 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.
303 SEAI-registered solar installers serve Hollymount, Co. Mayo. Compare installers in Mayo or read verified reviews.
Solar Installers in Mayo
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What Hollymount homeowners ask about solar
How much do solar panels cost in Hollymount?
A 4kWp system in Hollymount 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.
Do solar panels increase property value in Hollymount?
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 Hollymount is a long-term investment in your property.
How does shading affect solar panels in Hollymount?
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.
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.
How long does solar panel installation take?
A typical residential installation takes 1-2 days. This includes scaffolding, mounting the panels, wiring, inverter installation, and connecting to the grid. Your installer handles the ESB Networks notification (NC6 form).
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.
What is a BER assessment and do I need one?
A Building Energy Rating (BER) assessment is required after installing solar panels to claim the SEAI grant. A BER assessor visits your home and rates its energy efficiency from A1 to G. Solar panels typically improve your BER by 1-2 grades. The assessment costs around €150-€200.
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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