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Battery Energy Storage Systems Ireland

Store power when it is cheap and use it when it is expensive. We design and install commercial battery energy storage systems (BESS) for Irish businesses, with or without solar — including the design, grid approval and install.

Get a battery storage assessment

We analyse your usage, size the system and show you the payback. Free, no obligation.
100%

Year-one tax write-off (ACA)

Fox ESS & KSTAR

Battery systems we install

€162,600

Upto NDMG
grant

Upto NDMG grant

30–50%

Typical bill
reduction

Typical bill reduction

What does a battery do?

A commercial battery does several jobs at once. Which ones matter most depends on your tariff, how you use power and your grid connection.

Peak shaving

Your demand charge is set by your busiest half hour. The battery covers those spikes, so one busy afternoon does not set your bill for months.

Cuts demand charges

Tariff optimisation

Charge the battery at cheap night rates and use that power during expensive hours. This works with or without solar panels.

Cuts unit costs

Solar self-consumption

Solar without a battery often exports power you could have used. The battery stores that surplus for later in the day.

Lifts solar ROI

Backup & grid limits

Keep critical equipment running through power cuts. A battery can also let you add load without an ESB Networks connection upgrade.

Protects operations

How does battery storage work?

Your demand charge is set by your single busiest half hour. A battery covers that spike, so your bill is based on a lower peak.
Without a battery
Peak 142 kW
Peak charge threshold
42 kW
62 kW
82 kW
142 kW
88 kW
124 kW
58 kW
40 kW
6am9am12pm2pm 4pm6pm9pm12am
With a battery
Peak 100 kW
Peak charge threshold
42 kW
62 kW
82 kW
100 kW
88 kW
100 kW
58 kW
40 kW
6am9am12pm2pm 4pm6pm9pm12am
Battery covers this

We work this out from your actual meter data, so the system is sized around the hours that actually cost you money.

Grants & Tax Relief

Is there a grant for battery storage?

The SEAI grant does not cover batteries

The SEAI Non-Domestic Microgen Grant funds solar PV only. There is no grant for battery storage in Ireland, whatever a quote may suggest. We would rather tell you now than have you find out later.

ACA: 100% written off in year one

Battery equipment on the SEAI Triple-E register qualifies for the Accelerated Capital Allowance. You deduct the full cost from your profits in year one instead of spreading it over eight years. For most profitable businesses this is worth more than a grant. Check it with your accountant.
Dominos Solar 3

Do you need solar to have a battery?

No. Solar and storage work well together, but a battery pays its way on tariff savings and demand charges on its own. We work on commercial-scale systems only, not small domestic-size installs.
Testimonials

What Our Happy Customers Say About Us

google reviews with star
5.0

18 Reviews

Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Going Solar from Resolute Engineering Group. As a small family home B&B with many hips, valleys and dormers on main roof and limited space around house required for car parking some imagination was required and Going Solar came up with a plan on a budget to deliver us up to 11,000 kw of power annually via an Anker solid inverter and 20kw of battery, while housing our 25 solar panels on 2 carport structures. On completion the carpark was returned to pre arrival condition and our carbon footprint was slashed by up to 11000 tones a year. On power cuts with change over switch the batteries can keep our home lite for days. Soon Anker app will be updated to automatically fill batteries from any source when Met Eireann issues a red weather warning. Resolute engineering kindly threw in a 21kw zappi 3 phase car charger when doing the install. We had some drama during install that many would have walked from but @ResoluteEngineering @goingsolar saw the project through delivering a finished product any team could be proud of. Yesterday SEAI inspectors called and said top class finish, nothing left out, an install that makes their job easy Thanks to every one who had a part to play in our install at Going Solar @ Resolute Engineering https://resolutegroup.ie/
Posted on Google Google
Tom Donagher profile picture
Tom Donagher
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
A big thank you to the team for a very efficient and professional install yesterday. We're delighted with our system and surprised to see that our battery charge went from 25% to 79% today with solar alone, despite the awful weather. We also really appreciate the excellent advice on the size of system to go for and the best panel arrangement; we found the consultation process to be technically far superior to the sales talk of the other solar companies we spoke to.
Posted on Google Google
Finola O'Rourke profile picture
Finola O'Rourke
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Very professional from start to finish. Great installation team
Posted on Google Google
Brenda Mccann profile picture
Brenda Mccann
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Very good professional services.
Posted on Google Google
Kevin Delany profile picture
Kevin Delany
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Very professional, well installed and easy to work with on grants etc. The panels are working great since installation earlier this year. I would definitely recommend
Posted on Google Google
Brian Tonge profile picture
Brian Tonge

How we design your BESS

Four steps from your first meter reading to a monitored, running system.

01

Load analysis

Your meter data shows which hours cost you most

02

Sizing & payback

Capacity and output matched to your peaks

03

Grid & safety design

ESB approval, capacity checks, fire safety, siting

04

Install & monitor

Fitted around your operations, monitored after handover

Trusted by Leading Irish Businesses

What we pair battery storage with

Commercial Solar

Store the power you currently export

EV Charging

Add chargers without a grid upgrade

Solar for Schools

Evening and peak-time use
Have any questions?

Frequently Asked Questions

No. The SEAI grant covers solar panels only. The tax incentive is the Accelerated Capital Allowance, which lets you write off Triple-E registered equipment against your first-year profits.

No. Charging at night and using that power during expensive hours saves money on its own. Solar makes the case stronger. We take on commercial-scale battery projects only, not small domestic-size systems.

We size it from your meter data: the kWh capacity needed to cover your expensive hours, and the kW output your peaks demand. We work on commercial-scale systems, so small domestic-size batteries are outside what we do.

Often, yes. Using stored power during peaks lets a site run above its import capacity, which can delay or avoid an ESB Networks upgrade when adding EV chargers or new equipment.

This depends on the battery type and how often it cycles. Manufacturer performance warranties cover the expected life, and remote monitoring tracks condition over time.
Contact Resolute Engineering Group

Find out what a battery is worth on your site

We will analyse your usage data, size the system and show you the payback. Free, and we reply within one working day.

Book Your Free Consultation

Request your free consultation below. Our team will assess your requirements and come back to you soon.