Solar Panels in St. Mullins, Co. Carlow
St. Mullins is a village in Co. Carlow with a population of around 400. Located 38.5 km from Carlow Town, the area has a solar yield of 818 kWh/kWp. A 4kWp solar system generates approximately 3,272 kWh annually, saving an estimated €982+ per year. The SEAI grant of up to €1,800 and 0% VAT bring the net cost to €3,200–€6,200.
St. Mullins solar irradiance and generation figures
| Solar Metric | Value |
|---|---|
| Solar Yield | 818 kWh/kWp |
| 4kWp System Output | 3,272 kWh/yr |
| Sunshine Hours | 1,490 hrs/yr |
| Est. Annual Savings | €982+ |
| Household Coverage | 78% of avg use |
Solar yield calculated for St. Mullins (52.49°N, 6.90°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Monthly Solar Output in St. Mullins
kWh per month (4kWp system)
St. Mullins at a Glance
| Area Data | Value |
|---|---|
| Population | 400 (Census 2022) |
| Elevation | 94 metres |
| Eircode Area | Y34 |
| Dist. to Carlow Town | 38.5 km |
| Location | Inland |
| Coordinates | 52.4910°N, 6.8964°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Johnstown Castle, 34.6 km).
Weather & Climate in St. Mullins
Weather data from Met Eireann (Johnstown Castle station, 34.6 km from St. Mullins). 5-year average (2019–2023).
Renewable Energy Potential in St. Mullins
St. Mullins is a village in Co. Carlow with a population of 400 (CSO Census 2022). It is accessible from Carlow Town (38.5 km), where most SEAI-registered installers in the county are based. The Eircode routing key for St. Mullins is Y34. 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 3,272 kWh per year (818 kWh/kWp). The area has moderate rainfall (1114 mm/yr), with a mean temperature of 10.6°C.
Why Go Solar in St. Mullins?
Save on Electricity Bills
Homeowners in St. Mullins can save an estimated €982+ per year on electricity with a 4kWp solar system generating 3,644 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.
Top Solar County in Ireland
Co. Carlow ranks #5 in Ireland for solar yield with 911 kWh/kWp. Homes in St. Mullins benefit from some of the best solar conditions in the country.
25+ Year Lifespan
A system installed in St. Mullins today will generate clean electricity for 25-30 years with minimal maintenance.
SEAI Solar Grant for St. Mullins Residents
Homeowners in St. Mullins, Co. Carlow 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 Carlow
SEAI registered solar panel installers covering Carlow.
Top Rated Solar Installers Near St. Mullins
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St. Mullins solar panel questions answered
How much do solar panels cost in St. Mullins?
A 4kWp system in St. Mullins 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 3,644 kWh/year, paying for itself in 4-6 years.
What maintenance do solar panels need?
Solar panels need very little maintenance. Rain keeps them clean in most cases. There are no moving parts. Your inverter may need replacing once in 25 years (10-15 year lifespan). Annual visual checks and occasional cleaning if near trees is all that's needed.
What is the difference between solar PV and solar thermal?
Solar PV panels generate electricity from sunlight. Solar thermal panels heat water directly. For most Irish homes, solar PV is the better investment: it's more versatile, qualifies for the SEAI grant, and you can sell excess electricity. Solar thermal only heats water.
What is the payback period for solar panels in St. Mullins?
With a net cost of €3,200-€6,200 after the SEAI grant and savings of €982+ per year plus export income, a typical solar system in St. Mullins pays for itself in 4-6 years. After payback, you get 20+ years of near-free electricity.
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).
How do I get the SEAI grant in St. Mullins?
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 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
- 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: March 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
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