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 793 kWh/kWp and 1,500+ sunshine hours per year, solar energy is a strong investment for homeowners here. A typical 4kWp system generates approximately 3,172 kWh annually, covering 76% of average household electricity use. After the SEAI grant of up to €1,800 and 0% VAT, the net cost is €3,200–€6,200 with payback in 4–6 years.
Portmarnock solar irradiance and generation figures
| Solar Metric | Value |
|---|---|
| Solar Yield | 793 kWh/kWp |
| 4kWp System Output | 3,172 kWh/yr |
| Sunshine Hours | 1,500 hrs/yr |
| Est. Annual Savings | €952+ |
| Household Coverage | 76% of avg use |
Solar yield calculated for Portmarnock (53.42°N, 6.15°W) using PVGIS satellite data. Actual output varies by roof orientation, shading, and system specification.
Monthly Solar Output in Portmarnock
kWh per month (4kWp system)
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. Based on satellite data for this location, a 4kWp solar system generates approximately 3,172 kWh per year (793 kWh/kWp). 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 €952+ per year on electricity with a 4kWp solar system generating 3,660 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. 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 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 Dublin
SEAI registered solar panel installers covering Dublin.
Top Rated Solar Installers Near Portmarnock
Read verified reviews from solar panel installers serving Portmarnock, Co. Dublin.
Nearby Towns Also Served
Also serving nearby areas in Dublin:
Find Solar Installers in Dublin
Browse SEAI-registered installers covering Portmarnock and all of Dublin.
Portmarnock solar panel questions answered
How much do solar panels cost in Portmarnock?
A 4kWp system in Portmarnock 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 3,660 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.
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
Get a Free Solar Quote in Portmarnock
Connect with SEAI-registered installers covering Portmarnock, Co. Dublin.