Solar Panels in Portmarnock, Co. Dublin
Portmarnock is one of the larger towns in Co. Dublin with a population of 10,587. With a solar yield of 915 kWh/kWp and 1,500+ sunshine hours per year, solar energy is a strong investment for homeowners here. A typical 4kWp system generates approximately 3,660 kWh annually, covering 87% of average household electricity use. After the SEAI grant of up to €1,800 and 0% VAT, the net cost is €6,500–€7,200 with payback in 4–6 years.
Portmarnock solar irradiance and generation figures
| Solar Metric | Value |
|---|---|
| Solar Yield | 915 kWh/kWp |
| 4kWp System Output | 3,660 kWh/yr |
| Sunshine Hours | 1,500 hrs/yr |
| Est. Annual Savings | €1098+ |
| Household Coverage | 87% of avg use |
Based on county-level solar data for Dublin. Actual output varies by roof orientation, shading, and system specification.
Portmarnock at a Glance
| Area Data | Value |
|---|---|
| Population | 10,587 (Census 2022) |
| Houses/Bungalows (Co. Dublin avg.) | 82% of dwellings |
| Owner-Occupied (Co. Dublin avg.) | 81% |
| Built Before 2000 (Co. Dublin avg.) | 62% |
| Avg. Rooms per Home (Co. Dublin avg.) | 6.1 |
| Elevation | 11 metres |
| Eircode Area | D13 |
| Dist. to Dublin | 10.4 km |
| Location | Inland |
| Coordinates | 53.4177°N, 6.1513°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Dublin Airport, 6.1 km).
Weather & Climate in Portmarnock
Weather data from Met Eireann (Dublin Airport station, 6.1 km from Portmarnock). 5-year average (2019–2023).
Solar Suitability in Portmarnock
Across Co. Dublin, 82% of dwellings are houses or bungalows, making the area highly suited for rooftop solar panels. 81% of homes are owner-occupied — homeowners can apply directly for the SEAI grant. 62% of homes were built before 2000, qualifying for the SEAI solar grant (homes built and occupied before 2021 are eligible).
Renewable Energy Potential in Portmarnock
Portmarnock is a large town in Co. Dublin with a population of 10,587 (CSO Census 2022). It is a short drive from Dublin (10.4 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Portmarnock is D13. You'll need your full Eircode when applying for the SEAI grant. Across the wider Dublin area, 82% of dwellings are houses or bungalows and 81% are owner-occupied (Census 2022). Homeowners in Portmarnock with a south, east, or west-facing roof are well positioned for solar panels. The area receives around 1,500 sunshine hours annually, allowing a 4kWp solar system to generate approximately 3,660 kWh per year. The area has relatively low rainfall (798 mm/yr), with a mean temperature of 9.9°C.
Why Go Solar in Portmarnock?
Save on Electricity Bills
Homeowners in Portmarnock can save an estimated €1098+ per year on electricity with a 4kWp solar system generating 3,660 kWh annually.
Top Solar County in Ireland
Co. Dublin ranks #4 in Ireland for solar yield with 915 kWh/kWp. Homes in Portmarnock benefit from some of the best solar conditions in the country.
25+ Year Lifespan
A system installed in Portmarnock today will generate clean electricity for 25-30 years with minimal maintenance.
SEAI Solar Grant for Portmarnock Residents
Homeowners in Portmarnock, Co. Dublin 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€6,500–€7,200.
376 SEAI-registered solar installers serve Portmarnock, Co. Dublin. Compare installers in Dublin or read verified reviews.
Solar Installers Serving Portmarnock
SEAI registered solar panel installers covering Portmarnock, Co. Dublin.
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Portmarnock solar panel questions answered
How much do solar panels cost in Portmarnock?
A 4.4 kWp system in Portmarnock typically costs €8,300–€9,000 before grants. After the €1,800 SEAI grant and 0% VAT, the net cost is €6,500–€7,200. The system generates approximately 3,660 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.
How does shading affect solar panels in Portmarnock?
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.
Can I add a battery to my solar system?
Yes. A home battery (typically 5-10 kWh) stores excess solar electricity for evening use. This increases your self-consumption from around 30-40% to 60-80%. Batteries currently cost €3,000-€6,000 and are not yet covered by the SEAI grant.
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.
What roof direction is best for solar panels in Portmarnock?
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.
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.
Can you go off-grid with solar in Portmarnock?
Fully off-grid setups are rare in Portmarnock. Most homes stay grid-connected and sell surplus back through the Microgeneration Support Scheme. A hybrid inverter with 10-20 kWh of battery storage covers evenings and power cuts, which is what most people searching "off-grid" actually want. A true off-grid system needs a much larger array and battery bank, and you lose the grant-supported export income.
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: September 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
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