Home battery costs, grants and installation in Ireland

A home battery stores the electricity your solar panels make during the day so you can use it in the evening. In 2026, a typical 5 to 10 kWh battery costs between €4,000 and €8,000 installed in Ireland, and SEAI offers a €600 grant for batteries of 5 kWh or more.

Through solarpanels.ie, you can compare up to 4 home battery offers for free and without obligation.

What is a home battery and how does it work?

A home battery, also called a solar battery or battery storage system, stores electricity so you can use it later. Most solar panel systems in Ireland produce the most power in the middle of the day, when many households use the least. Without a battery, that surplus goes to the grid. With a battery, you keep it for the evening, when electricity is most expensive.

A battery can also charge from the grid at night on a night-rate or smart tariff and power your home during the day, which can cut your bills even without solar panels.

How it works in practice

• Charging: Your solar panels charge the battery with the electricity you don't use straight away. On a night-rate or smart tariff, it can also charge from the grid when electricity is cheapest.
• Storage: The battery holds the electricity until you need it. A typical home battery in Ireland stores between 5 and 10 kWh.
• Usage: In the evening, or when the panels aren't producing enough, your home draws power from the battery before it buys from the grid.
• Grid supply: When the battery is full, surplus electricity is exported to the grid, and your supplier pays you for it through the Clean Export Guarantee.

Choosing the best solar battery for your home

The right battery depends on how much electricity you use, when you use it and the size of your solar panel system. Installers will look at these factors:

• Capacity: Battery capacity is measured in kilowatt hours (kWh). Size it to your evening use, not your total daily use. A battery that's too big for your panels will rarely fill up.
• With or without solar panels: A battery works best alongside solar panels, but it can also save money on its own if you charge it on a cheap night rate.
• Inverter: If you already have solar panels, your installer will check whether your inverter works with a battery. A hybrid inverter can run both panels and battery; otherwise a separate battery inverter may be needed.
• Smart control: Many batteries come with an app that lets you schedule charging, follow your production and use, and make the most of smart tariffs.
• Location: SEAI recommends installing the battery outdoors, including on an outbuilding, in a suitable enclosure. It can go indoors if the space is well ventilated. Your installer should follow the manufacturer's guidance so the warranty stays valid.

How much does home battery storage cost in Ireland?

In 2026, a home battery typically costs between €4,000 and €8,000 installed in Ireland. A 5 kWh battery usually costs €4,000 to €5,500, while a 10 kWh battery is more often €6,000 to €8,000. Larger batteries, such as a 13.5 kWh unit, can cost €9,000 or more.

Adding a battery to existing solar panels can cost a little more if you need a new inverter or extra electrical work. Installing the battery at the same time as your panels is usually the cheapest option, and it also means 0% VAT.

The price depends on:

• the battery's capacity and brand
• whether you need a new or hybrid inverter
• whether the battery is installed together with solar panels or added later
• the location of the battery and the amount of cabling and electrical work
• whether you want backup power during power cuts, which needs extra equipment

SEAI battery grant

SEAI offers a grant of €600 for home batteries of 5 kWh or more. You can claim it together with the solar PV grant of up to €1,800 in a single application, or apply for the battery on its own if you already have solar panels. The home must have been built and occupied before 2025, and it can't have received a battery grant for the same MPRN before.

You must receive a grant offer from SEAI before work starts, and the battery must be installed by an SEAI registered solar PV contractor. Some households receiving certain social welfare payments can get enhanced grants of up to €9,000 for solar panels and a battery. Read more about the SEAI solar grant.

VAT on home batteries

The supply and installation of solar panels on homes has a 0% VAT rate. A battery supplied and installed with the panels under the same contract is also covered. A battery bought and installed on its own is usually charged at the standard 23% VAT rate.

Installing a home battery

A home battery must be installed by a qualified installer. To get the SEAI grant, you need an SEAI registered solar PV contractor, and a Registered Electrical Contractor (Safe Electric) must sign off on the electrical work.

Before installation, your installer applies to ESB Networks to connect the system to the grid, which usually takes at least 4 weeks. Once the battery is installed, they complete an NC6 form for ESB Networks and give you the commissioning and Safe Electric certificates you need for the grant.

A battery installed inside your home, in a garage or on an outbuilding doesn't usually need planning permission. If your home is a protected structure or in an architectural conservation area, check with your local council first. Read more about planning permission for solar panels.

Export payments: Electricity you export to the grid is paid for through the Clean Export Guarantee (CEG). The rate varies by supplier, so it's worth comparing. A battery lets you use more of your own electricity instead of exporting it at a lower rate than you pay to buy it. Export income up to a yearly limit is tax-free.

Smart and night-rate tariffs: With a smart meter, you can choose a tariff with cheap night-time or off-peak electricity. The battery charges when prices are low and powers your home when they're high, which can add to your savings even in winter, when solar panels produce less.

Compare solar battery installers in Ireland

Prices, products and warranties vary between installers, so it pays to compare more than one offer. Through solarpanels.ie, you can get offers from up to 4 local installers by filling out one short form.

The installers will contact you to talk about your home and electricity use and give you an offer based on your needs. Many will also recommend a battery size and check whether your current inverter is compatible.

The service is free and non-binding. Compare the offers on price, battery capacity, warranty and installation, and choose the one that suits you best, or turn them all down.

Frequently asked questions