Guide · Reviewed against RECI guidance and installer-published documentation. Last verified: 2026-10-22.

Home standby generator cost in Ireland (2026 guide)

Storm Éowyn in January 2025 changed the Irish backup-power market overnight. More than 750,000 premises lost supply, generators sold out nationally, and installer deposits stretched to months as households that had never considered standby power joined the queue. Two years on, quotes have settled into a more predictable pattern - and this guide sets out what a standby generator actually costs in Ireland in 2026, which levers move the price, and how to get an honest quote.

What you are actually paying for

An installed price is rarely just the box. When a RECI-registered installer quotes you, the figure bundles five distinct cost layers:

• The unit itself - engine, alternator and weatherproof enclosure, priced by kVA rating and fuel type.
• The transfer switch - an automatic transfer switch (ATS) or a manual changeover switch, plus the wiring to integrate it with your distribution board.
• Civil works - a concrete or composite plinth, cable trenching between the unit and the house, and earthing.
• Fuel provision - a diesel tank, an LPG tank (sometimes shared with an existing heating supply), or a gas-network connection where that is an option.
• Commissioning and certification - load testing, handover training and the RECI electrical certification for the connection work.

Ask any installer to break the quote into these five layers. A quote that only shows one number makes it impossible to compare - or to spot where a cheaper offer simply skipped the groundworks you will need anyway.

Installed cost by class (indicative 2026, EUR - ASSUMPTION)

Treat every band as a planning figure, not a quote. Two similar houses on the same road can differ by thousands: one may already have an LPG tank the installer can share, the other may need 30 metres of trench through a driveway.

The five levers that move your quote

1. Size (kVA)

Sizing is the single biggest cost driver, and oversizing is the most common way to waste money. A correctly sized essential-circuits installation often costs thousands less than a whole-home one - and covers the things that actually matter in an outage: water pump, heating controls, fridge, broadband, some lights and sockets. Use our generator sizing calculator to see how the kVA estimate is built, then read the full sizing methodology.

2. Automatic transfer switch vs manual changeover

An ATS senses the outage, disconnects from the grid, starts the generator and switches the load - all in seconds, unattended. A manual changeover switch costs less but requires someone home to switch over safely. For unattended homes, holiday homes and anyone away during working hours, the ATS premium is usually worth paying. Our installation and ATS guide explains both paths step by step.

3. Fuel type

LPG burns clean, stores indefinitely and can often share the household's existing heating tank - which is why it dominates the compact home market. Diesel delivers more output per euro at larger sizes and suits farmyards, but needs fuel care over long storage. HVO (hydrotreated vegetable oil) is increasingly supported by modern diesel engines as a renewable drop-in, though Irish availability is still uneven. Portable-class petrol is short-shelf-life fuel for occasional use only.

4. Site and civil works

Distance from the house, driveway surfaces, ground conditions, noise-sensitive neighbours and access for a crane lorry all show up in the groundworks line. Coastal sites on the Atlantic seaboard also justify corrosion-protection enclosures - a real consideration in Clare, Kerry, Mayo and Donegal especially.

5. Lead times

Since Éowyn, popular kVA brackets have periodically gone on allocation. Quotes can carry validity windows because stock moves. Booking ahead of storm season - not after the first Status Red warning - is the difference between installing in autumn and waiting until spring.

Running costs (indicative)

Fuel consumption depends on load and the specific unit, but as planning figures (ASSUMPTION - verify with the installer's data sheet for your unit):

• A typical compact standby set running a house at partial load consumes roughly 1.5 - 3 litres of diesel or equivalent LPG per hour.
• A three-day outage at that rate means 100 - 200 litres of fuel - which is why tank sizing is a design decision, not an afterthought.
• The annual service - oil, filters, battery test and an exercise-run check - is typically a modest annual cost comparable to a boiler service. Most Irish installers offer service plans at handover.

What you cannot offset: there is no grant

There is no SEAI grant for standby or portable generators. SEAI schemes cover heat pumps, insulation, solar PV and similar upgrades - not backup power plant. Budget for the full installed cost, and be sceptical of any marketing that hints at grant support. If a salesperson mentions a generator grant, walk away.

Getting quotes that compare honestly

1. Get three quotes from RECI-registered installers, each broken into the five cost layers above.
2. Fix the scope first - same kVA target, same fuel, same ATS-vs-manual decision for every bidder, or you are comparing different products.
3. Ask who does the electrical work - the ATS connection and safe isolation must be carried out by a RECI-registered electrical contractor, in-house or subcontracted.
4. Ask for the service terms - annual service cost, response commitment in storm season, and warranty conditions in writing.
5. Check lead time in writing - unit availability, plinth crew, and electrical booking dates.

The cost of waiting

The most expensive decision in this market is often deferring one. After Éowyn, households that waited for the next storm found multi-month queues. Those who installed in the quiet months paid standard rates and had the system commissioned before autumn. If your county has a history of multi-day outages - and after January 2025, most Irish counties do - the economics of booking early are straightforward.

Cost bands on this page are indicative 2026 planning figures (ASSUMPTION) compiled from Irish market reporting after Storm Éowyn. Real quotes vary by site, size and switchgear - always get RECI-registered installers to quote your actual property.