Solar Panels in Castlemahon, Co. Limerick
Castlemahon, Co. Limerick, 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.
How much solar energy can you generate in Castlemahon?
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.
Solar Power in Castlemahon, Co. Limerick
Castlemahon is a community in Co. Limerick. It is accessible from Limerick (36.4 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Castlemahon is P56 — you'll need your full Eircode when applying for the SEAI grant.
Advantages of Solar Energy for Castlemahon Homeowners
Save on Electricity Bills
Homeowners in Castlemahon 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.
Energy Independence
For homes in rural Castlemahon, solar panels provide energy security and reduced reliance on the grid. Combined with a battery, you can store power for evening use.
25+ Year Lifespan
A system installed in Castlemahon today will generate clean electricity for 25-30 years with minimal maintenance.
What SEAI grants can Castlemahon homeowners claim?
Homeowners in Castlemahon, 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.
Solar Panels in Areas Near Castlemahon
Also serving nearby areas in Limerick:
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Common Questions About Going Solar in Castlemahon
How much do solar panels cost in Castlemahon?
A 4kWp system in Castlemahon 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 Castlemahon?
Based on Limerick county data, a 4kWp system in Castlemahon 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 Castlemahon?
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 Castlemahon pays for itself in 4-6 years and lasts 25+ years.
What size solar system do I need for my home in Castlemahon?
Most homes in Castlemahon 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.
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.
How does shading affect solar panels in Castlemahon?
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.
Sources
Last updated: February 2026
Reviewed by the Solar Info editorial team. Editorial policy
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