Before the grant
€7,600
to €9,200
8 to 16 panels on a straightforward roof.
Solar Panel Cost in Mayo
What 8 to 16 panels cost before and after the SEAI grant, what a battery adds, VAT, export rates and payback.
Free, no obligation. One local installer prices it, not five.
- €5,8008 panels, after the SEAI grant
- €1,800SEAI grant for the panels
- 0% VATon solar panels for homes
What a typical home pays
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.
After the grant
€5,800
to €7,400
Less the €1,800 SEAI grant.
VAT
0%
on home solar
Since May 2023.
Payback
5–8 yrs
typical
Depending on how much of the power you use yourself.
Use an SEAI-registered installer, or you can't get the grant.
Our price guide for Mayo homes
Typical prices after the SEAI grant, with 0% VAT, and what each system makes on a south roof in Castlebar.
| System | Suits | Typical price after the grant | kWh a year, Castlebar | What moves the price |
|---|---|---|---|---|
| 8 panelsabout 3.5 to 3.9kWp | 2-bed terrace or a small bungalow | €5,800 to €6,000 | 3,340 | Roof access, panel make |
| 10 panelsabout 4.4 to 4.9kWp | 3-bed semi | €6,100 to €6,200 | 4,170 | Scaffolding, inverter size |
| 12 panelsabout 5.3 to 5.8kWp | 4-bed detached | €6,600 to €7,400 | 5,010 | Panels on two sides, cable run |
| 16 panelsabout 7 to 7.8kWp | Big house, a heat pump or an electric car | €7,400 to €8,700 | 6,680 | A bigger inverter, a second string |
| A battery5 to 10kWh, fitted with the panels | Using the power in the evening | +€1,300 to €2,400less the €600 battery grant | – | Battery size, a hybrid inverter |
What's included
- The panels, the inverter and the mounting rails
- Access to the roof on a normal house, scaffolding if it's needed
- The ESB Networks paperwork before the panels go live
- Testing, and the paperwork SEAI needs to pay your grant
- 0% VAT, because it's a home
What pushes it up or down
- Up: a high, steep or slate roof that needs more scaffolding
- Up: panels on two sides of the roof, or a split array
- Up: a long cable run to the fuse board, or a fuse board that needs work
- Up: a battery, an EV charger or a hot water diverter
- Down: one plain south-facing roof with easy access
- Down: the full SEAI grant, offer in hand before any work starts
By size, before and after the grant
Typical prices fitted, with the SEAI panel grant taken off.
| System | Typical price, fitted | SEAI grant | You pay |
|---|---|---|---|
| 8 panels3.88kWp | about €7,600 | −€1,776 | €5,824 |
| 10 panels4.85kWp | about €8,000 | −€1,800 | €6,200 |
| 12 panels5.82kWp | about €8,400 | −€1,800 | €6,600 |
| 16 panels7.76kWp | about €9,200 | −€1,800 | €7,400 |
Typical prices for a straightforward roof, 0% VAT on homes. The grant is worked out with SEAI's rates, panels only.
By house, after the grant
| Home | Typical cost after the grant |
|---|---|
| Small terraced4 panels, 1.76kWp | about €4,800 |
| 2-bed terraced8 panels, 3.5kWp | about €5,901 |
| 3-bed semi-detached10 panels, 4.4kWp | about €6,145 |
| 4-bed detached12 panels, 5.3kWp | about €7,400 |
| 6-bed detached16 panels, 7kWp | about €8,700 |
Batteries not included. SEAI puts the typical cost of an install at €1,700 to €2,500 per kWp before the grant.
Prices in Mayo are set by each installer, so use these as a benchmark to hold a quote against.
What a battery adds
A 5 to 10kWh battery fitted with the panels adds about €1,300 to €2,400; the biggest home batteries cost over €4,000. SEAI pays a flat €600 towards a battery of 5kWh or more, on top of the panel grant.
€1,800 off, more with a battery
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 to apply.
- €1,800 for panels
- Up to €1,800 + €600 with a battery
- Offer before any work starts
VAT, and what exports earn
VAT
Solar panels supplied and installed on homes have had a 0% VAT rate since May 2023. Ask the installer to confirm how VAT applies to a battery on your quote.
Exports
Under the Clean Export Guarantee your supplier pays you for power you send to the grid, around 19.5c per kWh depending on the supplier and up to €400 a year of it is tax-free. The supplier rates are in the table.
| Electricity supplier | Paid per kWh exported |
|---|---|
| SSE Airtricity | 32c |
| Pinergy | 25c |
| Energia | 20c |
| Electric Ireland | 19.5c |
| Bord Gáis | 18.5c |
| Flogas | 18.5c |
| Prepay Power | 15.89c |
| Yuno Energy | 15.89c |
Rates including VAT. Suppliers change these, so check yours before you sign up.
Payback
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.
Questions about cost
How much do solar panels cost in Mayo in 2026?
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 does a solar battery cost?
A 5 to 10kWh battery fitted with the panels adds about €1,300 to €2,400; the biggest home batteries cost over €4,000. SEAI pays a flat €600 towards a battery of 5kWh or more, on top of the panel grant.
Is there VAT on solar panels in Ireland?
Solar panels supplied and installed on homes have had a 0% VAT rate since May 2023. Ask the installer to confirm how VAT applies to a battery on your quote.
How long do solar 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.
How much do I get paid for exporting electricity?
Under the Clean Export Guarantee your supplier pays you for power you send to the grid, around 19.5c per kWh depending on the supplier and up to €400 a year of it is tax-free. The supplier rates are in the table.
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.
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