Solar Panels in Newcastle, Co. Dublin
Newcastle, Co. Dublin, has a solar yield of 915 kWh/kWp (among the highest in Ireland). A 4kWp system generates approximately 3,660 kWh annually, covering 87% of average household electricity use and saving an estimated €1098+ per year. With 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.
Newcastle solar irradiance and generation figures
| Solar Metric | Value |
|---|---|
| Solar Yield | 915 kWh/kWp |
| 4kWp System Output | 3,660 kWh/yr |
| Sunshine Hours | 1,514 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.
Newcastle at a Glance
| Area Data | Value |
|---|---|
| Population | 4,526 (Census 2022) |
| Houses/Bungalows (Co. Dublin avg.) | 98% of dwellings |
| Owner-Occupied (Co. Dublin avg.) | 78% |
| Built Before 2000 (Co. Dublin avg.) | 83% |
| Avg. Rooms per Home (Co. Dublin avg.) | 6 |
| Elevation | 94 metres |
| Eircode Area | K78 |
| Dist. to Dublin | 16.9 km |
| Location | Inland |
| Coordinates | 53.3000°N, 6.5014°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Casement Aerodrome, 4.2 km).
Weather & Climate in Newcastle
Weather data from Met Eireann (Casement Aerodrome station, 4.2 km from Newcastle). 5-year average (2019–2023).
Solar Suitability in Newcastle
Across Co. Dublin, 98% of dwellings are houses or bungalows, making the area highly suited for rooftop solar panels. 78% of homes are owner-occupied — homeowners can apply directly for the SEAI grant. 83% of homes were built before 2000, qualifying for the SEAI solar grant (homes built and occupied before 2021 are eligible).
Renewable Energy Potential in Newcastle
Newcastle is a town in Co. Dublin with a population of 4,526 (CSO Census 2022). It is a short drive from Dublin (16.9 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Newcastle is K78. You'll need your full Eircode when applying for the SEAI grant. Across the wider Dublin area, 98% of dwellings are houses or bungalows and 78% are owner-occupied (Census 2022). Homeowners in Newcastle 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 (804 mm/yr), with a mean temperature of 10.2°C.
Why Go Solar in Newcastle?
Save on Electricity Bills
Homeowners in Newcastle 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 Newcastle benefit from some of the best solar conditions in the country.
25+ Year Lifespan
A system installed in Newcastle today will generate clean electricity for 25-30 years with minimal maintenance.
SEAI Solar Grant for Newcastle Residents
Homeowners in Newcastle, 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 Newcastle, Co. Dublin. Compare installers in Dublin or read verified reviews.
Solar Installers Serving Newcastle
SEAI registered solar panel installers covering Newcastle, Co. Dublin.
WattSolar
carlow, cavan, clare +23 more
Fuinneamh Renewables Ltd
carlow, cavan, clare +23 more
DTN Electrical
carlow, dublin, kildare +8 more
Top Rated Solar Installers Near Newcastle
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Newcastle solar panel questions answered
How much do solar panels cost in Newcastle?
A 4.4 kWp system in Newcastle 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 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.
Do I need planning permission for solar panels?
Most residential solar installations are exempt from planning permission, provided panels don't project more than 15cm from the roof and don't cover more than 50% of total roof area.
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.
Is my roof suitable for solar panels in Newcastle?
Most roofs are suitable. You need at least 15-20 m² of unshaded roof space for a typical 4kWp system (10 panels). South, east, or west-facing roofs work well. Your installer will assess your roof's orientation, angle, and structural suitability during a site survey.
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 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.
Can you go off-grid with solar in Newcastle?
Fully off-grid setups are rare in Newcastle. 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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