Commercial Solar PV
Reduce operating costs with commercial solar panels. SEAI grant up to €162,600. Accelerated Capital Allowances for full Year 1 tax write-off. Systems from 30kW to 1MWp for businesses, farms, warehouses and schools across Ireland.
Key Features
- SEAI grant up to €162,600
- Accelerated Capital Allowances — full Year 1 write-off
- ROI typically 4–6 years
- Self-consumption 70–90% for daytime businesses
- Flat roof ballasted mounting — no penetrations
- Minimal disruption during installation
Your Roof Is a Power Station
Cut electricity bills by 30–70%. Grant-funded. Tax-deductible. Paying back in 4–6 years.
€162,600
Max SEAI grant
100%
Year 1 ACA tax write-off
4–6yr
typical payback
25yr
panel performance warranty
Why Commercial Solar in Ireland Makes Financial Sense
Commercial electricity in Ireland typically costs between 25c and 45c per kWh depending on your contract. Solar generates it for free. For any business operating during daylight hours — a warehouse, factory, farm, hotel, school, or supermarket — solar PV is one of the highest-return capital investments available.
The combination of a government grant of up to €162,600 and full Year 1 tax write-off under Accelerated Capital Allowances means the net cost of a commercial solar installation is significantly lower than the sticker price suggests.
Accelerated Capital Allowances (ACA) — What It Actually Means
Important: ACA is not free money. It’s a tax timing advantage — and a very significant one.
The SEAI grant reduces what you pay upfront. ACA reduces what you owe Revenue — but only if your business is profitable. Understanding the difference matters.
The Grant (SEAI) — This IS a reduction in cost
The SEAI grant is paid directly to you (or deducted from the invoice) after installation. It’s government money that reduces the actual cash you spend. A €100,000 installation with a €20,000 grant costs you €80,000. Simple.
Example: 100kWp system
Installation cost: €120,000
SEAI grant: −€22,600
You pay: €97,400
ACA — This reduces your tax bill, not your purchase price
Normally, when a business buys a capital asset (machinery, equipment), it can only write off the cost against tax over several years at 12.5% per year — that’s 8 years. ACA lets you write off the entire cost against your taxable profit in Year 1. You still spend the money — but you get the tax relief immediately instead of spread over 8 years.
What this means in euro:
System cost (after grant): €97,400
Corporation tax rate: 12.5%
Year 1 tax saving: €12,175
Without ACA, this saving spreads over 8 years instead
ACA — A Real Example
Let’s say your business installs a 100kWp solar system for €120,000, receives a €22,600 SEAI grant, and pays €97,400 net. Your business made a profit of €500,000 in Year 1 and corporation tax is 12.5%.
| Scenario | Without ACA (standard) | With ACA |
|---|---|---|
| Taxable profit before solar deduction | €500,000 | €500,000 |
| Capital allowance deducted in Year 1 | €12,175 (12.5% of €97,400) | €97,400 (100% in Year 1) |
| Taxable profit after deduction | €487,825 | €402,600 |
| Corporation tax bill (12.5%) | €60,978 | €50,325 |
| Year 1 tax saving from ACA vs standard | — | €10,653 saved in Year 1 |
Without ACA:
You get €1,522/year tax relief for 8 years as you write off the asset gradually. Total relief is the same — it just arrives over 8 years instead of 1.
With ACA:
You get the full €12,175 tax relief in Year 1. That cash stays in your business 7 years earlier. Better cashflow, faster effective payback.
⚠️ Important Limitations of ACA
- You must be profitable. If your business makes a loss, there’s no tax to reduce. ACA only helps businesses paying corporation tax. Speak to your accountant — it doesn’t apply to every situation.
- The ACA is on the net cost after the grant. You claim ACA on what you actually paid (post-grant), not the gross cost.
- Standard rate is 12.5%. Most Irish SMEs are on 12.5% corporation tax. The tax saving is 12.5% of the eligible cost — not the full amount. ACA accelerates when you receive this relief, not how much you receive.
- It’s not cash in hand. It reduces your tax bill. That’s a real saving — but it’s different from the SEAI grant, which directly reduces your invoice.
The Combined Effect
For a profitable Irish business, the combination of SEAI grant + ACA + energy savings creates a compelling financial case:
€22,600
SEAI grant (100kWp example)
Real cash reduction in cost
€12,175
Year 1 ACA tax saving
Tax relief accelerated to Year 1
€25,000+
Annual electricity savings
Ongoing for 25+ years
SEAI Non-Domestic Microgen Grant — Exact Figures
The grant scales with system size. Available to businesses, farms, schools, community centres, and non-profits. Apply before works start — SEAI letter of offer required first.
| System Size | Grant Rate | Grant Value | Typical Use |
|---|---|---|---|
| 1–2 kWp | €900 / €1,800 | €900 – €1,800 | Small office, shed |
| 3–6 kWp | €700/kWp (3kWp), flat €2,400 (4–6kWp) | €2,100 – €2,400 | Small business |
| 7–20 kWp | €300/kWp | €2,100 – €6,000 | Pub, small factory, farm shed |
| 21–200 kWp | €200/kWp | €4,200 – €40,000 | Warehouse, hotel, large farm |
| 201–1000 kWp | €150/kWp | €30,150 – €150,000 | Industrial, large commercial |
| Maximum (1,000 kWp) | — | €162,600 | Large industrial / campus |
30kWp example
€8,600
grant
50kWp example
€12,600
grant
100kWp example
€22,600
grant
500kWp example
€87,600
grant
⚠️ Critical: Do not start work before your letter of offer arrives.
SEAI requires grant approval before installation begins. Starting early invalidates your grant. Allow 4+ weeks for ESB Networks connection approval — this also must happen before installation.
Commercial Solar ROI — The Numbers
Assumes commercial electricity rate of 30c/kWh, 80% self-consumption, 950 kWh/kWp annual generation (Irish average). ACA saving based on 12.5% corporation tax, Year 1.
| System Size | Annual Output | Annual Saving | SEAI Grant | Net Cost | Payback |
|---|---|---|---|---|---|
| 30 kWp | approx 26,000 kWh | approx €6,200 | €8,600 | €21,400 to €31,400 | 4 to 5 yrs |
| 50 kWp | approx 43,000 kWh | approx €10,300 | €12,600 | €35,000 to €50,000 | 4 to 5 yrs |
| 100 kWp | approx 86,000 kWh | approx €20,600 | €22,600 | €70,000 to €100,000 | 4 to 5 yrs |
| 250 kWp | approx 215,000 kWh | approx €51,500 | €52,600 | €165,000 to €230,000 | 3.5 to 5 yrs |
Payback shortens significantly when ACA tax saving is factored in for profitable businesses. Electricity prices above 30c/kWh improve ROI further. Consult your accountant on ACA eligibility and timing.
Ideal Commercial Users
Warehouses & distribution
Large flat roofs, high daytime usage
Manufacturing
High consumption, runs during solar hours
Cold storage
Refrigeration load perfectly matched to solar
Hotels & hospitality
Hot water + all-day electricity demand
Farm sheds
TAMS or NDMG grant available, large roofs
Schools & community
Daytime operation = high self-consumption
Supermarkets & retail
Lighting + refrigeration covered by solar
Offices
Peak usage during peak solar generation
Industrial units
High-voltage loads, large roof potential
Frequently Asked Questions
Do I need planning permission for commercial solar?
Systems up to 1,000m² of solar panels are generally exempt from planning permission in Ireland under the Planning and Development Regulations. Larger systems or installations on protected structures will require full planning. We assess this as part of every commercial project.
Can we export excess solar to the grid and earn money?
Yes. Commercial systems connect under the microgeneration support scheme. Excess electricity is exported and paid for via the Clean Export Guarantee (CEG). Most commercial sites have high enough self-consumption that export is minimal — but the option is there.
Does ACA apply to solar in Ireland?
Yes. Solar PV equipment qualifies for Accelerated Capital Allowances under the Irish government’s energy efficiency incentive programme. This allows the full net cost (after grant) to be deducted against taxable profit in Year 1, rather than over 8 years at 12.5%/year. Your accountant will handle the claim — we provide the necessary documentation. ACA only benefits profitable, tax-paying businesses.
How long does the grant process take?
Allow 6–10 weeks total from application to installation start: SEAI grant application and letter of offer (2–4 weeks), followed by ESB Networks connection approval (4+ weeks / 20 working days minimum). We manage both processes on your behalf. Do not start any works before both approvals are received.
Can we install on a flat roof without drilling through it?
Yes. Ballasted mounting systems use weighted frames to hold panels in place without any roof penetration. These are standard for industrial flat roofs and avoid any warranty or waterproofing issues. A structural survey confirms suitability.
Let’s Run the Numbers for Your Business
We’ll survey your site, model the ROI, confirm grant eligibility, and give you a clear picture of costs, savings, and payback — before you commit to anything.
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