Commercial solar PV support has increased to as much as €325,200, while higher support has also been announced for heat pumps and solar thermal. For businesses considering an energy project, the funding case has changed but the grant should still follow the energy plan.

Irish businesses have entered a more favourable funding period for energy-efficiency and renewable-energy investment.

SEAI has substantially increased support for commercial solar PV and announced higher grant rates for business heat pumps and solar thermal installations. Existing programmes can also support energy audits, building fabric, controls, ventilation, metering and larger decarbonisation projects.

The changes form part of the Government's September energy-affordability package, with the main business measures taking effect around 6 October 2026. They should not all be described as new Budget 2027 measures: the principal grant increases were announced on 29 September ahead of Budget day. Sustainable Energy Authority of Ireland

For businesses, the important change is not simply that larger grants are available. There are now stronger funding routes at several stages of an energy project from identifying where energy is being wasted, through technical design, to paying for the eventual equipment.

That makes the order in which a project is approached increasingly important.

Commercial Solar PV Support Has Doubled at the Top End

The most substantial confirmed change is to SEAI's Non-Domestic Microgen Grant, which supports commercial solar PV.

The maximum grant has increased from €162,600 to €325,200, with grant-supported capacity available up to 1,000 kWp. During the enhanced funding window, the final payment is capped at the lower of the size-based grant award or 45% of the eligible invoiced installation cost. Sustainable Energy Authority of Ireland

That distinction matters.

The scheme is not simply a flat reimbursement of 45% of every solar project. SEAI first calculates an award according to the installed capacity bands. The 45% rule then acts as an additional cap on the amount ultimately paid.

For example, the current bands produce an indicative grant of €45,200 for a 100 kWp installation before the invoice-cost cap is applied.

If the eligible invoiced cost of that system were €80,000, 45% would be €36,000. The grant would therefore be capped at €36,000 rather than €45,200.

If the eligible cost were €120,000, the 45% figure would be €54,000, but the size-based award would remain the lower amount at €45,200.

This is why the headline percentage alone does not establish the actual grant.

SEAI says the enhanced solar PV support is available for new applications during the temporary window running to 6 July 2027. Existing applications are not automatically increased to the new rates. Sustainable Energy Authority of Ireland

Solar Still Has to Be Sized Against the Load

A larger grant does not automatically justify a larger solar array.

The commercial case still depends on when the site uses electricity, how much of the solar generation can be consumed behind the meter, available roof or ground space, connection requirements and the cost of the installation after grant support.

A warehouse with a large roof and limited daytime consumption can have a very different solar profile from a food manufacturer, hotel or retailer using substantial electricity throughout daylight hours.

The grant changes the capital cost. It does not change the underlying load profile.

That is why electricity consumption data should normally be assessed before system sizing begins.

Heat Pump and Solar Thermal Support Is Moving to 45%

The Government's 29 September package also announced an increase in Business Energy Upgrades support for qualifying commercial heat pumps and solar thermal installations to 45% of eligible costs. SEAI estimated average annual energy savings of approximately €3,500 for each of those measure categories, although actual savings will depend on the building and installation. Sustainable Energy Authority of Ireland

There is an important administrative point as of 6 October.

The SEAI announcement gives the enhanced 45% rate, while some individual live measure pages still display the previous support levels. For example, SEAI's heat-pump page continues to show support of up to 30% and a €100,000 grant ceiling at the time of writing. Sustainable Energy Authority of Ireland

The enhanced rate has therefore been announced, but businesses should confirm the applicable current terms and Letter of Offer before treating a particular grant amount as committed. The same caution is noted in Energy Matters Ireland's 6 October grants review.

For heat pumps in particular, the percentage grant is only part of the decision.

A commercial heat-pump project can involve the heating distribution system, operating temperatures, building fabric, hot-water demand, plant-room configuration and electrical capacity. Installing a heat pump into a building that has not first been assessed for those conditions can undermine the economics of the project.

Technical Design Can Be Funded Before the Equipment

One of the more useful SEAI supports is not an equipment grant at all.

The Technical Assistance Grant can fund up to 50% of the cost of a building-specific consultant engineer's design package, to a maximum grant of €25,000. The design can cover renewable heat, energy efficiency and BMS controls. Sustainable Energy Authority of Ireland

For a business considering several measures at once, this can be more valuable than immediately selecting a technology.

A design study can establish whether the sensible sequence is to improve building fabric first, change heating plant, install controls, add solar generation, or carry out several measures as part of a coordinated project.

That avoids a common problem with grant-funded investment: selecting the measure because funding is available and only then asking whether it is the best use of capital.

The Business Energy Upgrades Scheme Covers More Than Solar

SEAI's Business Energy Upgrades programme provides a broader menu of measures for commercial buildings.

Alongside heat pumps and solar thermal, the scheme includes support for wall and roof fabric, variable-speed pumps, ventilation and heat recovery, Building Management Systems and technical assistance. Sustainable Energy Authority of Ireland

Building fabric support can reach €120,000, with grants of up to 30% for qualifying roof and wall upgrades. Sustainable Energy Authority of Ireland

For buildings with an existing BMS, SEAI also provides an optimisation route designed to identify faults, improve settings and extract savings from the controls already installed. Sustainable Energy Authority of Ireland

This is commercially relevant because not every energy saving requires a major equipment replacement.

Poor scheduling, unnecessary heating or cooling, pumps running continuously and badly configured controls can all increase consumption even where the main plant itself is serviceable.

The first capital project should therefore not automatically be the most visible one.

The Energy Audit Route Changes on 11 October

The Support Scheme for Energy Audits provides a €2,000 voucher towards a professional business energy audit.

From 11 October 2026, SEAI says eligibility will move to a consumption-based test. Public and private enterprises consuming less than 2.8 GWh, or 10 TJ, of energy annually from all sources will be eligible, subject to the remaining scheme conditions. The previous SME status test for private enterprises will no longer apply. Sustainable Energy Authority of Ireland

This makes an audit accessible to a wider group of businesses based on their actual energy consumption rather than simply their corporate size.

The 2.8 GWh threshold also has a second significance.

Article 11 of the recast EU Energy Efficiency Directive requires Member States to ensure that enterprises averaging more than 10 TJ annually over the previous three years, taking all energy carriers together, undergo an energy audit unless they operate the qualifying energy-management-system route. The Directive sets 11 October 2026 for the first audit for enterprises falling into that category. EUR-Lex

SEAI is currently supporting the Irish transition and implementation of Article 11 through its Leap to 11 programme. Sustainable Energy Authority of Ireland

That creates a useful dividing line for businesses.

Below the consumption threshold, an enterprise may be able to use the €2,000 audit support. Around or above it, the issue can move from voluntary energy assessment into regulatory compliance.

For multi-site businesses in particular, consumption needs to be considered at enterprise level rather than assuming each individual meter or premises stands alone.

Local Enterprise Office Funding Can Take the Audit Into Implementation

For qualifying small businesses, completing the audit can also open another funding route.

The Local Enterprise Office Energy Efficiency Grant provides 75% of eligible costs, from €750 up to a maximum grant of €10,000, for qualifying projects identified through a Green for Business report, GreenStart report or SEAI Energy Audit. Local Enterprise

Typical uses include energy-efficient equipment, monitoring, controls and eligible operational upgrades.

This creates a practical sequence for many smaller businesses: identify the waste first, document the recommended improvement and then assess whether the equipment itself qualifies for capital support.

It is also important to recognise the boundaries between schemes.

The LEO grant is not designed to replace SEAI's dedicated solar PV or building-upgrade programmes. The Energy Matters Ireland review also identifies exclusions for measures such as commercial solar PV, space-heating heat pumps and certain building upgrades under the LEO route.

The funding decision therefore needs to be made at project-cost level rather than assuming one grant can be applied across an entire refurbishment.

Enterprise Ireland Clients Have a Different Set of Options

Larger or export-focused businesses that are Enterprise Ireland clients can have access to a different funding structure.

GreenStart provides up to 80% of eligible consultancy costs, capped at €5,000, for work including environmental management, resource efficiency and development of a decarbonisation strategy. It does not fund capital equipment, and legally required energy audits are excluded. Enterprise Ireland

GreenPlus moves further into implementation and organisational capability, providing 50% of eligible project costs up to a €50,000 grant. Eligible costs can include external environmental expertise, training and elements of the internal project team. Enterprise Ireland

Enterprise Ireland also operates an Energy Monitoring and Tracking Systems support with grant funding of up to €50,000 for new metering systems. Enterprise Ireland

For manufacturing or energy-intensive businesses, this can be important.

Without sufficiently granular metering, a site may know its monthly electricity bill but still have limited visibility on whether the consumption is coming from refrigeration, compressed air, process heat, HVAC, production equipment or out-of-hours base load.

Measurement can therefore be part of the investment case rather than an administrative afterthought.

Larger Projects Have Funding Routes Beyond Rapid Approval

The €10,000 or €25,000 grant range does not represent the upper limit of business energy support.

For significant energy projects, SEAI's EXEED programme can provide grant funding of up to €3 million, with the award linked to project type, eligible expenditure and verified energy savings. EXEED is aimed particularly at substantial renovations, new designs, process upgrades and larger energy users. Sustainable Energy Authority of Ireland

SEAI also operates an Energy Contracting Support Scheme, which can fund up to 75% of qualifying external advisory costs, subject to maximum support of €50,000 for Energy Performance Contracts or Local Energy Supply Contracts and €25,000 for Energy Performance Guarantees. Sustainable Energy Authority of Ireland

These routes become relevant where the project is too large or technically complex to be treated as a straightforward equipment replacement.

The funding question then becomes part of a wider investment case involving energy savings, project risk, design, capital expenditure and contract structure.

Business Energy Funding at a Glance