Solar Panels in Castlebar
A south-facing roof in Castlebar makes about 860 kWh a year for every kWp of panels. That's 4,170 kWh from 10 panels, for about €6,200 after the SEAI grant. Tell us about the house and one local SEAI-registered installer who covers your area rings you with a price.
Free, no obligation. One local installer prices it, not five.
- 860kWh a year per kWp, south roof
- €1,800SEAI grant for the panels
- 0% VATon solar panels for homes
A Castlebar roof, every direction
kWh a year for each kWp of panels, from the EU's PVGIS satellite record.
What's different about solar in Castlebar
- A south roof in Castlebar makes about 860 kWh a year for each kWp of panels, sixth of the nine Mayo towns we checked. Ten panels (4.85kWp) make about 4,170 kWh: 531 in June and 106 in December.
- East and west roofs make about 695 kWh per kWp here, 81% of a south roof. A flat roof with panels at 10° makes 789.
- SEAI's home grant is for owners of homes built and occupied before 2025. On Census 2022, 95% of Castlebar's homes were built before 2011 and 5% since, all inside that rule.
- 54% of households in Castlebar own their home and 44% rent. The grant goes to the owner, so if you rent, it's the landlord who would apply.
- 13% of households live in a flat or apartment. Panels on a shared roof need the owners' management company to agree before an installer can price them.
Nearby towns
What panels cost in Castlebar
What 8 to 16 panels cost on a Castlebar roof, and what each system makes here a year. The installer prices your own roof, so hold the quote against these.
| System | Typical price, fitted | SEAI grant | You pay | kWh a year in Castlebar |
|---|---|---|---|---|
| 8 panels3.88kWp | about €7,600 | −€1,776 | €5,824 | 3,340 |
| 10 panels4.85kWp | about €8,000 | −€1,800 | €6,200 | 4,170 |
| 12 panels5.82kWp | about €8,400 | −€1,800 | €6,600 | 5,010 |
| 16 panels7.76kWp | about €9,200 | −€1,800 | €7,400 | 6,680 |
Typical prices for a straightforward roof, 0% VAT on homes. The grant is worked out with SEAI's rates, panels only. Output is for a south roof.
Castlebar questions
How much do solar panels cost in Castlebar?
8 to 16 panels (3.88kWp to 7.76kWp) cost about €7,600 to €9,200 fitted, before the grant. Take off the €1,800 SEAI grant and that's €5,800 to €7,400. With a battery or a harder roof, most homes pay €6,000 to €9,000 after the grant.
How much power do panels make in Castlebar?
About 860 kWh a year per kWp on a south roof, so 10 panels make about 4,170 kWh. East and west roofs make about 695 per kWp.
Can I get the SEAI grant for a house in Castlebar?
If you own it, it was built and lived in before 2025, and SEAI hasn't paid for panels at the address before. 95% of homes in Castlebar were built before 2011.
How much is the SEAI grant?
SEAI pays €700 per kWp for the first 2kWp of panels and €200 per extra kWp up to 4kWp, so up to €1,800 for the panels. A battery of 5kWh or more adds a flat €600, so the most a home gets is €2,400.
How long do panels take to pay back?
Typically five to eight years, depending on how much of the power you use yourself. Power you use saves you the full unit price, 36c to 45c per kWh on standard tariffs, while power you export earns around 19.5c per kWh. The Department of Energy estimates a 4kWp system with a battery could save as much as €900 a year.
Get a solar price in 3 quick taps
Tell us about the house. It goes to one local SEAI-registered installer who covers your area, and they ring you with a price.
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