The Planned SEAI Solar Grant Step-Down: Does Waiting Until 2027 or 2028 Save You Money?

The SEAI Solar Electricity Grant is €1,800 in 2026 — and that figure held flat only because Minister O’Brien reversed the planned cut in November 2025. It was the first time since the scheme began that the grant was not reduced year-on-year. The government’s published plan is still to reduce it by up to €300 a year until the grant is expected to end in 2029.

So: should you install now, or wait for prices to drop?

Waiting until 2027 saves you around €125 on the install itself. Waiting until 2028 saves around €229 on the install — but costs you roughly €2,200 in electricity savings your panels would have generated in the meantime. On net, waiting to 2028 leaves you approximately €1,971 worse off.

What the Government Has Said About the Grant Step-Down

Citizens Information, in a page dated 10 March 2026, confirmed the government’s position on the grant trajectory. The exact wording: “The Government plans to reduce the grant by up to €300 every year, as the cost of solar panels reduce. The grant is due to end in 2029.”

Source: citizensinformation.ie — Grants for solar panels (page dated 10 March 2026).

The 2026 reduction was already reversed once. The plan had been to cut the grant by €300 for 2026, bringing it to €1,500. Minister O’Brien intervened in November 2025 and kept it at €1,800. Ronan Power, CEO of Solar Ireland, called the decision “simple, sensible and hugely positive,” adding that keeping the grant at €1,800 “will help thousands more families cut their energy bills.” The 2027 rate has not been confirmed as of May 2026. It is expected to be set in the October 2026 budget.

That context cuts both ways. It shows the government is willing to hold the grant flat when it decides to. It also shows the direction of travel is downward. For anyone with a roof ready now, the 2026 rate is the known quantity. Waiting for 2027 means betting the budget goes your way.

The Three-Year Break-Even Table

The table models your net install cost across three install years, then shows what waiting actually costs when you account for the electricity savings you miss while your panels are not yet running.

On install cost alone, waiting to 2028 saves €229. That is before you account for the electricity savings your panels would have generated in the meantime.

The Real Cost of Waiting: Two Years of Missed Savings

A 4 kWp solar system on an average Irish home saves roughly €1,100 a year. That covers the electricity you no longer have to buy from the grid plus the export income from surplus generation under the Clean Export Guarantee. The exact figure varies: homes with a heat pump or EV charger drawing power during the day typically land at €1,200–€1,400; homes without those loads are closer to €900–€1,000.

If you wait until 2028 rather than installing in 2026, you forgo two years of those savings:

2 years × €1,100/yr = €2,200 in missed electricity savings

Waiting to 2028 does not save you €229. It costs you approximately €1,971 in total.

What About Waiting Just One Year — to 2027?

The 2027 case is tighter. The net install saving is only €125. Against that, you miss one year of electricity savings — approximately €1,100.

There is also a political variable. The October 2026 budget could hold the grant flat again (as it did for 2026), reduce it by less than €300, or reduce it by the full €300. If it holds flat, the case for waiting one year gets worse. If it drops by €300, the case is exactly as modelled above.

Under the full €300 reduction scenario: net cost of waiting from 2026 to 2027 is roughly €975 worse off (€1,100 in lost savings, minus €125 install saving). Even if the budget reduces the grant by only €150 — half the planned amount — you are still worse off waiting by around €1,025.

The step-down does not compensate for the electricity savings you lose while waiting. It compensates, partially, for the falling install cost, and nothing more.

The October 2026 Decision Point

The autumn budget (expected October 2026) is the earliest point at which 2027 grant rates will be confirmed.

If you are currently in the quote-gathering stage, there is still time to lock in the 2026 grant. The grant rate is locked at the rate in effect when the Letter of Offer is issued — so even if your install and post-works BER assessment complete in October or November, you keep the 2026 grant provided your Letter of Offer arrived under the 2026 rate. The Letter of Offer is valid for 8 months.

To have your Letter of Offer arrive before the October budget, a practical target is to submit your SEAI application by late September 2026. Verify current SEAI processing times on mgen.seai.ie before submitting — application volumes in mid-2026 are high.

What If Solar Costs Fall Faster Than 5% a Year?

The 5% annual cost reduction in the table above is a modelling assumption, not a published government figure. If Irish install costs fall faster, the case for waiting improves.

At 10% annual cost deflation:

• 2027 gross cost: approximately €7,650, grant €1,500, net approximately €6,150 (saving vs 2026: approximately €550)
• 2028 gross cost: approximately €6,885, grant €1,200, net approximately €5,685 (saving vs 2026: approximately €1,015)

Even at 10% deflation per year, waiting to 2028 only pays off if your electricity savings from panels would be below €500 a year. For any home saving €900 or more — which covers most Irish homes with moderate usage — waiting still costs more than installing now.

Key Facts

• The 2026 SEAI Solar Electricity Grant is confirmed at €1,800 — 2026 is the first year since the scheme began that it was not reduced
• Grant tiers: €700 per kWp for the first 2 kWp, €200 per kWp for the next 2 kWp — maximum €1,800 for a 4 kWp or larger system
• The government’s published plan is to reduce the grant by up to €300 per year until it is expected to end in 2029, per Citizens Information (10 March 2026)
• The planned 2026 cut was reversed by Minister O’Brien in November 2025 — the 2027 rate has not been confirmed as of May 2026
• 0% VAT applies to the supply and installation of solar panels on private dwellings since 1 May 2023
• The Letter of Offer is valid for 8 months from issue; the grant rate is locked at the rate in effect when the Letter of Offer is issued
• A 4 kWp system saves approximately €900–€1,400/yr in electricity costs; €1,100 is a mid-range estimate for a home without a heat pump or EV charger

For the full grant tier maths and how the €700/€200 per kWp formula works, see the SEAI solar grant tier calculation guide. For current installed system costs across different system sizes, see the solar panels cost Ireland guide.

Frequently Asked Questions