Solar Panels in Castlebar, Co. Mayo
Castlebar is one of the larger towns in Co. Mayo with a population of 13,054. With 1,105+ sunshine hours per year, solar energy is a strong investment for homeowners here. A typical 4kWp system generates approximately 3,364 kWh annually — covering 80% 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.
Castlebar solar yield and performance data
Solar Yield
4kWp Output
Sunshine
Est. Savings
Household Coverage
Population
Eircode Area
Dist. to Castlebar
Location
Based on county-level solar data for Mayo. Actual output varies by roof orientation, shading, and system specification.
Castlebar and Renewable Energy
Castlebar is a large town in Co. Mayo with a population of 13,054 (CSO Census 2022). It is a short drive from Castlebar (10.6 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Castlebar is F56 — you'll need your full Eircode when applying for the SEAI grant.
Why Go Solar in Castlebar?
Save on Electricity Bills
Homeowners in Castlebar can save an estimated €1009+ per year on electricity with a 4kWp solar system generating 3,364 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 Castlebar today will generate clean electricity for 25-30 years with minimal maintenance.
SEAI Solar Grant for Castlebar Residents
Homeowners in Castlebar, Co. Mayo 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 Mayo
SEAI registered solar panel installers covering Mayo.
Nearby Towns Also Served
Also serving nearby areas in Mayo:
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Frequently Asked Questions About Solar Panels in Castlebar
How much do solar panels cost in Castlebar?
A 4kWp system in Castlebar 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 3,364 kWh/year, paying for itself in 4-6 years.
How much electricity will solar panels generate in Castlebar?
Based on Mayo county data, a 4kWp system in Castlebar generates approximately 3,364 kWh per year — covering 80% of average household use (4,200 kWh/year). Mayo receives around 1,105 sunshine hours annually.
Are solar panels worth it in Castlebar?
Yes. With estimated savings of €1009+ per year, the €1,800 SEAI grant, 0% VAT, and export income of 15-25c/kWh, a solar system in Castlebar pays for itself in 4-6 years and lasts 25+ years.
What size solar system do I need for my home in Castlebar?
Most homes in Castlebar benefit from a 3-6 kWp system. A 4kWp system (10 panels) covers 80% of average household electricity use. Your installer will assess your roof space, orientation, and energy usage to recommend the optimal size.
How does shading affect solar panels in Castlebar?
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.
What happens to my solar panels if I move house in Castlebar?
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.
Sources
Last updated: February 2026
Reviewed by the Solar Info editorial team. Editorial policy
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