Solar panels for business Ireland owners are weighing up have rarely been better supported: from 6 October 2026, SEAI’s grant rose to an effective 45% rate for new applications, alongside accelerated capital allowances and VAT recovery for registered businesses. This guide explains how the three fit together and gives a simple way to judge payback. Checked 26 October 2026. It’s general information, not tax advice; speak to your accountant. For sector-specific pages, see industries we service.
The SEAI 45% grant for business solar
SEAI’s Non-Domestic Microgen Grant is open to businesses, the agricultural sector, public sector bodies, schools, community centres and non-profits. For new applications from 6 October 2026 to 6 July 2027, SEAI pays the lower of its grant table value and 45% of the invoiced cost, up to €325,200. Existing applications aren’t increased.
| System size | Grant table value |
|---|---|
| 1kWp | €1,800 |
| 2kWp | €3,600 |
| 3kWp | €4,200 |
| 4–6kWp | €4,800 |
| 7–20kWp | €600 per kWp |
| 21–200kWp | €400 per kWp |
| 201–1,000kWp | €300 per kWp |
Key conditions:
- Use an SEAI-registered Non-Domestic Microgen (Solar PV) company and sign a formal contract before applying.
- Don’t start works until you receive the letter of offer. Offers are valid for eight months.
- Batteries are not eligible; the scheme supports self-consumption, not export-only systems (SEAI guide).
- Aid can’t be combined with other State grants for the same measure (SEAI terms). Grants over €10,000 in a calendar year need a Tax Clearance Certificate.
Farms can alternatively use TAMS 3, which pays 60% with a separate €90,000 investment ceiling (Teagasc), but not both. See our solar panels for farms guide.
Accelerated capital allowances
Accelerated capital allowances (ACA) let companies, sole traders and farmers paying tax in Ireland write off 100% of qualifying equipment in the first year (SEAI). Photovoltaic systems and inverters are in the Triple E Heating and Electricity Provision category, with a €1,000 minimum spend (SEAI). The scheme runs to the end of 2030 (Revenue eBrief 028/26). Equipment must be new, used in the trade and not leased out. Allowances are generally calculated on cost net of grants; our ACA guide covers the detail.
VAT on business solar
The 0% VAT rate for solar applies to private dwellings and recognised schools, not commercial, industrial or retail premises. For those, the reduced rate may apply under a supply-and-install contract, subject to the two-thirds rule (Revenue). VAT-registered businesses can generally reclaim VAT on goods and services used for taxable supplies through their VAT3 return; VAT linked to exempt activities can’t be reclaimed, and mixed use is apportioned (Revenue). Ask installers to quote ex-VAT and confirm the rate applied.
Solar panels for business Ireland: how to approach payback
Payback for a business depends far more on how much solar you use on site than on the panels themselves. The approach:
- Get your load profile. Half-hourly data from your smart meter or supplier shows when you use power. Daytime-heavy users (offices, shops, chilled storage, manufacturing) suit solar best.
- Size to daytime demand. Electricity you use replaces your full unit rate; exported electricity earns less. Under the planning exemptions, power must also be primarily (over 50%) used on site.
- Ask for a modelled yield from each installer, with orientation, shading and assumptions stated.
- Net off the grant and tax. Grant first, then ACA on the net cost, with your accountant.
- Run the numbers with your own tariff. Unit rate, standing charges and any export payment.
Here’s the method in action. Every number below is an assumption for illustration, not a quote or a prediction:
| Item | Illustrative figure | Basis |
|---|---|---|
| System | 50kWp | Assumed |
| Installed cost (ex VAT) | €50,000 | Assumed for illustration |
| Grant table value | €25,200 | €13,200 for first 20kWp + 30kWp × €400 |
| 45% of cost | €22,500 | 45% × €50,000 |
| SEAI grant paid | €22,500 | Lower of the two |
| Net cost | €27,500 | €50,000 − €22,500 |
| Annual generation | about 43,500kWh | 870kWh/kWp, derived from SEAI’s homeowner guide example |
| Used on site (80%) | about 34,800kWh | Assumed share |
| Value at 20c/kWh | about €6,960 a year | Assumed unit rate |
| Simple payback (before tax relief and export) | about 4 years | €27,500 ÷ €6,960 |
Choosing a commercial installer
Commercial jobs carry more risk than a home system: bigger roofs, more complex electrical work and often a busy site. Before you sign, check that the company is registered for SEAI’s Non-Domestic Microgen scheme, that a Registered Electrical Contractor will do the electrical work, and that the quote names every product and states the yield assumptions. Ask how they’ll manage access, scaffolding and working at height around your operations, how long the site will be disrupted, and what monitoring and service you get after handover. Get at least two quotes on the same specification; our compare solar quotes guide has a side-by-side checklist.
Planning and grid connection
Since October 2022, roof-mounted solar on business, industrial and agricultural buildings is broadly exempt from planning, subject to conditions on height, edge distances and on-site use (S.I. 493/2022). Inside one of the 43 Solar Safeguarding Zones near airports and helipads, roof panels are limited to 300m² per roof and you must notify the council (gov.ie). For grid connection, systems up to 11kVA on three-phase can use ESB Networks’ NC6 micro-generation route; larger systems use mini-generation or bigger connection routes (ESB Networks).
FAQs
How much is the SEAI grant for business solar panels?
For new applications from 6 October 2026 to 6 July 2027, the lower of SEAI’s table value and 45% of invoiced cost, up to €325,200.
Can a sole trader claim ACA on solar panels?
SEAI says companies, sole traders and farmers paying corporation tax or income tax can use the scheme, if the equipment is on the Triple E register and used in the trade.
Is there 0% VAT on solar panels for businesses?
No. The zero rate is for private homes and recognised schools. Business premises may get the reduced rate under a supply-and-install contract; VAT-registered businesses can usually reclaim VAT.
Does the business grant cover batteries?
No. SEAI’s application guide says batteries are not eligible under the Non-Domestic Microgen scheme.
Can I start installing while the grant is being processed?
No. SEAI says not to start works until you receive the letter of offer.
Get your solar quote today
Get your solar quote today. Tell us about your premises and electricity use, and we’ll connect you with SEAI-registered commercial installers for itemised quotes under the 45% grant. Call 089 450 4544 to discuss your project.
