Solar Panels in Williamstown, Co. Galway
Williamstown is a village in Co. Galway with a population of around 198. Located 55.2 km from Galway, the area receives 1,182+ sunshine hours per year. A 4kWp solar system generates approximately 3,544 kWh annually — saving an estimated €1063+ per year. The SEAI grant of up to €1,800 and 0% VAT bring the net cost to €3,200–€6,200.
What is the solar potential in Williamstown?
Solar Yield
4kWp Output
Sunshine
Est. Savings
Household Coverage
Population
Eircode Area
Dist. to Galway
Location
Based on county-level solar data for Galway. Actual output varies by roof orientation, shading, and system specification.
About Solar Energy in Williamstown
Williamstown is a village in Co. Galway with a population of 198 (CSO Census 2022). It is located away from Galway (55.2 km), where most SEAI-registered installers in the county are based. The Eircode routing key for Williamstown is F26 — you'll need your full Eircode when applying for the SEAI grant.
Benefits of Solar Panels in Williamstown
Save on Electricity Bills
Homeowners in Williamstown can save an estimated €1063+ per year on electricity with a 4kWp solar system generating 3,544 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 Williamstown, 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 Williamstown today will generate clean electricity for 25-30 years with minimal maintenance.
Government Support for Solar in Williamstown
Homeowners in Williamstown, Co. Galway 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 Galway
SEAI registered solar panel installers covering Galway.
Where can you find solar installers near Williamstown?
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Solar Panel FAQs for Williamstown
How much do solar panels cost in Williamstown?
A 4kWp system in Williamstown 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 3,544 kWh/year, paying for itself in 4-6 years.
How much electricity will solar panels generate in Williamstown?
Based on Galway county data, a 4kWp system in Williamstown generates approximately 3,544 kWh per year — covering 84% of average household use (4,200 kWh/year). Galway receives around 1,182 sunshine hours annually.
Are solar panels worth it in Williamstown?
Yes. With estimated savings of €1063+ per year, the €1,800 SEAI grant, 0% VAT, and export income of 15-25c/kWh, a solar system in Williamstown pays for itself in 4-6 years and lasts 25+ 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.
What is the Microgeneration Support Scheme?
The Microgeneration Support Scheme allows homeowners to sell surplus solar electricity back to the grid at 15-25c/kWh. You need a smart meter (free from ESB Networks) and a grid-connected system. The first €400/year of export income is tax-free.
What roof direction is best for solar panels in Williamstown?
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.
Sources
Last updated: February 2026
Reviewed by the Solar Info editorial team. Editorial policy
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