ESB Opens Major Battery Plant At Poolbeg Site

ESB has opened a major battery plant at its Poolbeg site in Dublin today, 7 February.

This new battery plant will add 75MW (150MWh) of fast-acting energy storage to help provide grid stability and deliver more renewables on Ireland’s electricity system.

Currently the largest site of its kind in commercial operation in Ireland, this battery energy storage system (BESS) is part of ESB's pipeline projects that are being completed at sites in Dublin and Cork, representing an investment of up to €300m.

These high-capacity batteries can store excess renewable energy for discharge when required which will help Ireland meet its climate targets by 2030 and ESB in achieving its Net Zero by 2040 strategy.

This project at ESB's Poolbeg site has been in operation since November 2023 and has a capability of providing 75MW of energy for two hours to Ireland's electricity system. Some of the latest technologies that will support the future delivery of renewable energy including batteries, hydrogen and offshore wind will be deployed at this site over the next decade.


ESB is working with partners Fluence, as well as Irish companies, Kirby Group and Powercomm Group, in the delivery of these projects at Poolbeg, Aghada, Inchicore, and South Wall.

Eamon Ryan TD, Minister for the Environment, Climate and Communications, said: "Energy storage like this major battery plant at the ESB's flagship site in Poolbeg will be a core part of Ireland’s new renewable energy transition and will play a key role in balancing our new, homegrown power supply. No electricity system can operate without a backup. In Ireland this has traditionally been provided by fossil fuel generation. However, into the future, we can store increasing amounts of wind and solar power in energy storage projects and use it to support the system instead of relying on dirty and expensive coal or gas."

Jim Dollard, ESB Executive Director, Generation and Trading, outlined how the plant will support ESB’s Net Zero by 2040 target: "Today marks another important milestone for ESB as we launch our latest fast-acting grid-scale battery unit that will support grid stability and help to deliver more renewables on Ireland’s electricity system. The location of this project, at our Poolbeg Energy Hub, will build on our longstanding history of innovation at the site. We are looking forward to continuing to work with our partners to deliver the remainder of our projects in development this year."