Solar Panels in Castletroy, Co. Limerick
Located just 3.7 km from Limerick, Castletroy receives 1,281+ sunshine hours per year — ideal conditions for solar energy. A 4kWp system generates approximately 3,476 kWh annually, covering 83% of average household electricity use and saving an estimated €1043+ per year. With 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.
What is the solar potential in Castletroy?
Solar Yield
4kWp Output
Sunshine
Est. Savings
Household Coverage
Eircode Area
Dist. to Limerick
Location
Based on county-level solar data for Limerick. Actual output varies by roof orientation, shading, and system specification.
About Solar Energy in Castletroy
Castletroy is a area near the county town in Co. Limerick. It is conveniently close to Limerick (3.7 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Castletroy is V94 — you'll need your full Eircode when applying for the SEAI grant.
Benefits of Solar Panels in Castletroy
Save on Electricity Bills
Homeowners in Castletroy can save an estimated €1043+ per year on electricity with a 4kWp solar system generating 3,476 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.
Increase Property Value
Solar panels improve your BER rating and can add up to 4% to your property value.
25+ Year Lifespan
A system installed in Castletroy today will generate clean electricity for 25-30 years with minimal maintenance.
Government Support for Solar in Castletroy
Homeowners in Castletroy, Co. Limerick 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 Limerick
SEAI registered solar panel installers covering Limerick.
Where can you find solar installers near Castletroy?
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Solar Panel FAQs for Castletroy
How much do solar panels cost in Castletroy?
A 4kWp system in Castletroy 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 3,476 kWh/year, paying for itself in 4-6 years.
How much electricity will solar panels generate in Castletroy?
Based on Limerick county data, a 4kWp system in Castletroy generates approximately 3,476 kWh per year — covering 83% of average household use (4,200 kWh/year). Limerick receives around 1,281 sunshine hours annually.
Are solar panels worth it in Castletroy?
Yes. With estimated savings of €1043+ per year, the €1,800 SEAI grant, 0% VAT, and export income of 15-25c/kWh, a solar system in Castletroy pays for itself in 4-6 years and lasts 25+ years.
How do I get the SEAI grant in Castletroy?
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 size solar system do I need for my home in Castletroy?
Most homes in Castletroy benefit from a 3-6 kWp system. A 4kWp system (10 panels) covers 83% of average household electricity use. Your installer will assess your roof space, orientation, and energy usage to recommend the optimal size.
Do solar panels work in winter in Limerick?
Yes, solar panels generate electricity all year round. While output is lower in winter, Limerick still receives usable daylight hours even in December. Annual generation figures (3,476 kWh for a 4kWp system) already account for seasonal variation.
Sources
Last updated: February 2026
Reviewed by the Solar Info editorial team. Editorial policy
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