How many panels are in a 6kW solar system?

A 6kW system is usually around 14 panels, depending on each panel's wattage. Most Irish homes have the roof space for this on a single pitch.

How much does a 6kW solar system with a battery cost in Ireland?

A 6kW system with a 5kWh battery typically costs €12,000 to €17,200 before grants, or about €9,600 to €14,800 after the €1,800 solar grant and €600 battery grant.

How much electricity does a 6kW solar system produce in Ireland?

A 6kW system generates roughly 5,400 to 6,600 kWh a year in Ireland. That covers a large share of a typical home's annual electricity use.

What SEAI grant can I get for a 6kW solar system?

A 6kW system qualifies for the full €1,800 SEAI solar grant. Add a 5kWh or larger battery and you get a further €600.

Is a 6kW solar system worth it in Ireland?

Yes. For a four-bed or high-use home, a 6kW system can save roughly €1,000 to €1,900 a year and usually pays for itself in about 6 to 8 years.

Do I need a battery to get the SEAI solar grant?

No. The €1,800 solar grant depends on your system's output, so a battery is not required to claim it.

6kW Solar System Cost in Ireland 2027 | Price After SEAI Grant

Most homeowners pay €9,000 to €13,000 for a 6kW solar system in Ireland, falling to about €7,200 to €11,200 after the SEAI grant. At roughly 14 panels, it is the size that suits a typical four-bed home. This guide breaks the cost down line by line.

What a 6kW Solar System Costs in Ireland

A 6kW system is around 14 panels and costs €9,000 to €13,000 installed, before the €1,800 SEAI grant brings it down to roughly €7,200 to €11,200. A 5kWh battery adds to that. The table below sets out the full cost at a glance.

Item	Typical figure (6kW)
System size	6kW, around 14 panels
Install cost before grant	€9,000 to €13,000
SEAI solar grant	−€1,800
Net cost after grant	€7,200 to €11,200
VAT	0%
Add a 5kWh battery	+€3,000 to €4,200 (less €600 grant)

What Changes the Price of a 6kW System

Two 6kW systems can be quoted hundreds of euro apart. Here is what moves your price:

Panel brand and quality: premium panels cost more up front but last longer and generate more.
Roof type and access: slate, tile or flat roofs, and any scaffolding, all change the labour.
Battery storage: a 5kWh+ battery is the single biggest add-on to the base price.
Inverter choice: a hybrid inverter that runs a battery costs more than a basic string inverter.
Panel count: more panels raise the total but lower the cost per panel.

Where Your 6kW Quote Will Land

Most 6kW systems land in the middle of the €9,000 to €13,000 range. You reach the lower end with standard panels, a simple roof and no battery. You hit the top with premium panels, a flat or awkward roof, and added storage. Smaller 4kW systems cost less up front, so if your usage is lower it is worth comparing sizes in our full solar panel cost guide.

The SEAI Grant on a 6kW System

A 6kW system qualifies for the full €1,800 SEAI solar grant, which is reached at 4kWp, so you do not need a battery to claim it. Add a 5kWh or larger battery and you get a further €600 battery grant on top. Domestic installs also carry 0% VAT. To qualify, your home must have been built and occupied before 2025 and the work done by an SEAI-registered installer. Going Solar handles the full SEAI application for you. See the current rates on our solar panel grants page.

The Benefits of a 6kW Solar System

Beyond the grant, a 6kW system pays you back in four ways.

Lower Electricity Bills

A 6kW system covers most of a typical home’s daytime electricity. Going Solar estimates a well-matched system cuts bills by 60% to 70%, and homeowners save roughly €1,000 to €1,900 a year once export payments are counted.

A Smaller Carbon Footprint

Every unit your panels produce is clean electricity you did not draw from the grid. Over a year that cuts your home’s carbon emissions and supports Ireland’s climate targets.

A Better BER and Resale Appeal

Solar lifts your home’s BER rating, one of the first things buyers and renters look at. A stronger BER can make the property easier to sell or let.

More Energy Independence

Producing your own power means less exposure to rising electricity prices. Add a battery and you store daytime solar for the evening peak, leaning on the grid even less.

The Cost Factors in Detail

The factors above set the price. Here is a closer look at the three that move it most, so you know what you are paying for.

Panel and Component Quality

Cheaper panels and inverters lower the up-front price but can generate less and fail sooner, so the cheapest quote rarely works out cheapest over time. Tier 1 panels and a solid inverter cost more and hold their output for longer. Going Solar’s own Topco panels, for example, carry a 25-year warranty and are built for the Irish climate, which is why it pays to choose an experienced home solar installer.

Installation and Labour

Labour is a big part of any quote, and it varies with your roof. A straightforward slate or tile roof is quicker and cheaper to fit than a flat roof, awkward access, or one that needs extra scaffolding. The electrical work and grid connection add to it too. Going Solar typically completes a home install in a single day.

Maintenance and Warranty

Solar panels need very little upkeep, usually just the odd clean and an inverter replacement at some point over the system’s life. Good installers back the work with strong product and workmanship warranties, so check both before you buy. Going Solar’s systems come with a monitoring app and ongoing aftercare, so any drop in output is spotted early.

A 6kW system suits most larger Irish homes, and after the €1,800 grant and 0% VAT it is more affordable than many expect. The only way to pin down your exact cost is a quote based on your roof and usage, with the grant handled for you.