The SEAI commercial solar grant, the Non-Domestic Microgen Grant (NDMG), now pays an effective 45% of your solar PV costs, worth up to €325,200 per site. That enhanced rate runs for a nine-month window, from 6 October 2026 to 6 July 2027.
The grant pays a set amount per kilowatt-peak (kWp) installed, so a bigger system earns a bigger grant, up to the cap. For new applications in this window, every per-kWp band is double the old rate, and SEAI pays whichever is lower, the band value or 45% of your invoiced cost.
Below we set out the current NDMG rates, who qualifies, how the 45% rule works, and how to apply before the deadline. Figures are current as of November 2026 and should be confirmed on seai.ie before you apply.
What Is the SEAI Commercial Solar Grant (NDMG)?
The NDMG is a capital grant from the Sustainable Energy Authority of Ireland that funds solar PV for non-domestic buildings, meaning businesses, farms, schools, sports clubs and public bodies. It pays a fixed amount per kWp installed, currently at an enhanced effective 45% rate, up to a maximum grant of €325,200 per site.
The scheme sits under SEAI’s microgeneration supports, and the commercial solar grant page sets out how it applies to different premises, from rooftop to ground-mount.
- Open to a wide range of non-domestic applicants across the Republic of Ireland.
- Paid as a set amount per kWp, banded by system size and capped by the 45% rule.
- Claimed after the system is installed and signed off by an SEAI-registered contractor.
Northern Ireland businesses can’t use the NDMG, as it applies only in the Republic. Cross-border operators should check the supports that apply on the NI side separately.
How Much Is the SEAI Commercial Solar Grant Worth?
The NDMG is worth up to €325,200 per site, paid at an effective 45% of eligible costs for new applications made between 6 October 2026 and 6
July 2027. Before this enhanced window the maximum was €162,600, so the per-kWp rates have doubled across every band.
The grant is banded by system size, and the bands are cumulative, like income-tax bands. Each kWp is paid at the rate of the band it falls into.
| System Size | Grant Value |
| 1 kWp | €1,800 |
| 2 kWp | €3,600 |
| 3 kWp | €4,200 |
| 4 to 6 kWp | €4,800 |
| 7 to 20 kWp | €600 per kWp |
| 21 to 200 kWp | €400 per kWp |
| 201 to 1,000 kWp | €300 per kWp |
| Above 1,000 kWp | Capped at €325,200 |
There’s one more rule that decides your payment. SEAI pays the lower of the band value or 45% of your invoiced eligible cost, the maximum aid allowed under EU state-aid rules. A keenly priced system collects the full 45%, while a larger or more expensive one is held to its band value.
Here’s what common system sizes draw under the enhanced rates, against what they earned before.
| System Size | Enhanced Grant | Old Grant |
| 20 kWp | €13,200 | €6,600 |
| 50 kWp | €25,200 | €12,600 |
| 100 kWp | €45,200 | €22,600 |
| 200 kWp | €85,200 | €42,600 |
| 1,000 kWp | €325,200 | €162,600 |
Because the grant is banded and taper-based, sizing the system to your actual demand is where the numbers are won or lost. You can confirm the current bands on SEAI’s non-domestic microgen grant page before you contract an installer.
Who Is Eligible for the NDMG Solar Grant?
Eligibility is open to any non-domestic electricity account holder in the Republic of Ireland with a suitable site and a system from 1 kWp up to 1,000 kWp. The grant starts at 1 kWp. The 7 kWp figure is simply where per-kWp banding begins, so smaller commercial systems still qualify.
Businesses, farms, community groups, schools and public bodies can all apply, provided the work is done by an SEAI-registered contractor.
- A valid non-domestic MPRN (your electricity meter point reference).
- A building or land in the Republic of Ireland suitable for solar PV.
- A system fitted by an SEAI-registered Non-Domestic Microgen installer.
- A letter of offer from SEAI before any works begin. Starting early can void the grant.
- A new application made inside the window, from 6 October 2026 to 6 July 2027.
Do Farms Qualify Under the NDMG?
Farms qualify as non-domestic applicants, and the enhanced 45% NDMG has become the main route for many farms since solar support under TAMS was scaled back. You take one route per system, so you
can’t claim the NDMG and the TAMS solar measure on the same install. Our guide to the new 45% rate and what it changes for farms compares the two routes so you can see which suits your project before you apply.
Can Schools and Public Bodies Apply for the NDMG?
Yes, schools, colleges and public-sector bodies are eligible as non-domestic applicants, at the same enhanced 45% rate. Public procurement rules may apply on top of SEAI’s process, so build that extra step into your timeline when you plan the project.
