Solar Panels in Castlewarren, Co. Kilkenny
Located just 10.2 km from Kilkenny, Castlewarren receives 1,360+ sunshine hours per year — among the highest in Ireland. A 4kWp system generates approximately 3,620 kWh annually, covering 86% of average household electricity use and saving an estimated €1086+ 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.
How much solar energy can you generate in Castlewarren?
Solar Yield
4kWp Output
Sunshine
Est. Savings
Household Coverage
Eircode Area
Dist. to Kilkenny
Location
Based on county-level solar data for Kilkenny. Actual output varies by roof orientation, shading, and system specification.
Solar Power in Castlewarren, Co. Kilkenny
Castlewarren is a community in Co. Kilkenny. It is a short drive from Kilkenny (10.2 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Castlewarren is Y21 — you'll need your full Eircode when applying for the SEAI grant. Co. Kilkenny ranks #7 in Ireland for solar yield, making Castlewarren an excellent location for solar panels.
Advantages of Solar Energy for Castlewarren Homeowners
Save on Electricity Bills
Homeowners in Castlewarren can save an estimated €1086+ per year on electricity with a 4kWp solar system generating 3,620 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. Kilkenny ranks #7 in Ireland for solar yield with 905 kWh/kWp. Homes in Castlewarren benefit from some of the best solar conditions in the country.
25+ Year Lifespan
A system installed in Castlewarren today will generate clean electricity for 25-30 years with minimal maintenance.
What SEAI grants can Castlewarren homeowners claim?
Homeowners in Castlewarren, Co. Kilkenny 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 Kilkenny
SEAI registered solar panel installers covering Kilkenny.
Solar Panels in Areas Near Castlewarren
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Browse SEAI-registered installers covering Castlewarren and all of Kilkenny.
Common Questions About Going Solar in Castlewarren
How much do solar panels cost in Castlewarren?
A 4kWp system in Castlewarren 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 3,620 kWh/year, paying for itself in 4-6 years.
How much electricity will solar panels generate in Castlewarren?
Based on Kilkenny county data, a 4kWp system in Castlewarren generates approximately 3,620 kWh per year — covering 86% of average household use (4,200 kWh/year). Kilkenny receives around 1,360 sunshine hours annually.
Are solar panels worth it in Castlewarren?
Yes. With estimated savings of €1086+ per year, the €1,800 SEAI grant, 0% VAT, and export income of 15-25c/kWh, a solar system in Castlewarren pays for itself in 4-6 years and lasts 25+ years.
What size solar system do I need for my home in Castlewarren?
Most homes in Castlewarren benefit from a 3-6 kWp system. A 4kWp system (10 panels) covers 86% of average household electricity use. Your installer will assess your roof space, orientation, and energy usage to recommend the optimal size.
What happens to my solar panels if I move house in Castlewarren?
Solar panels stay with the property — they're a permanent fixture. They add value to your home for the next buyer. The SEAI grant does not need to be repaid if you sell. Your installer can transfer monitoring accounts to the new owner.
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.
Sources
Last updated: February 2026
Reviewed by the Solar Info editorial team. Editorial policy
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