Solar Panels in Rathfarnham, Co. Dublin
Rathfarnham is one of the larger towns in Co. Dublin with a population of 23,276. With a solar yield of 915 kWh/kWp and 1,514+ 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.
Rathfarnham 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.
Rathfarnham at a Glance
| Area Data | Value |
|---|---|
| Population | 23,276 (Census 2022) |
| Houses/Bungalows (Co. Dublin avg.) | 71% of dwellings |
| Owner-Occupied (Co. Dublin avg.) | 57% |
| Built Before 2000 (Co. Dublin avg.) | 73% |
| Avg. Rooms per Home (Co. Dublin avg.) | 4.8 |
| Elevation | 50 metres |
| Eircode Area | D14 |
| Dist. to Dublin | 5.9 km |
| Location | Inland |
| Coordinates | 53.2988°N, 6.2855°W |
Population and housing data: CSO Census 2022. Weather data: Met Eireann (Casement Aerodrome, 10.2 km).
Weather & Climate in Rathfarnham
Weather data from Met Eireann (Casement Aerodrome station, 10.2 km from Rathfarnham). 5-year average (2019–2023).
Solar Suitability in Rathfarnham
Across Co. Dublin, 71% of dwellings are houses or bungalows, with good potential for rooftop solar installations. 57% of homes are owner-occupied — homeowners can apply directly for the SEAI grant. 73% of homes were built before 2000, qualifying for the SEAI solar grant (homes built and occupied before 2021 are eligible).
Renewable Energy Potential in Rathfarnham
Rathfarnham is a large town in Co. Dublin with a population of 23,276 (CSO Census 2022). It is conveniently close to Dublin (5.9 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Rathfarnham is D14. You'll need your full Eircode when applying for the SEAI grant. Across the wider Dublin area, 71% of dwellings are houses or bungalows and 57% are owner-occupied (Census 2022). Homeowners in Rathfarnham 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 Rathfarnham?
Save on Electricity Bills
Homeowners in Rathfarnham 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 Rathfarnham benefit from some of the best solar conditions in the country.
25+ Year Lifespan
A system installed in Rathfarnham today will generate clean electricity for 25-30 years with minimal maintenance.
SEAI Solar Grant for Rathfarnham Residents
Homeowners in Rathfarnham, 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 Rathfarnham, Co. Dublin. Compare installers in Dublin or read verified reviews.
Solar Installers Serving Rathfarnham
SEAI registered solar panel installers covering Rathfarnham, Co. Dublin.
Powers Solar PV installations LTD
carlow, dublin, kildare +9 more
Solar Power Ireland BK Ltd
carlow, cavan, clare +23 more
Top Rated Solar Installers Near Rathfarnham
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Rathfarnham solar panel questions answered
How much do solar panels cost in Rathfarnham?
A 4.4 kWp system in Rathfarnham 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 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 Rathfarnham?
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 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.
What roof direction is best for solar panels in Rathfarnham?
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.
How long do solar panels last?
Modern solar panels are warrantied for 25-30 years and typically last even longer. Panel efficiency degrades by about 0.5% per year, so after 25 years, your panels will still produce around 87% of their original output. Inverters typically last 10-15 years and may need one replacement.
Can you go off-grid with solar in Rathfarnham?
Fully off-grid setups are rare in Rathfarnham. 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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