This latest battery energy storage system (BESS), currently the largest site of its kind in commercial operation in Ireland, is part of ESB's pipeline of projects which are being delivered at sites in Dublin and Cork – representing an investment of up to €300m. “Energy storage. . Ireland inaugurated the country's 'largest' grid-scale battery energy storage facility, located in Poolbeg Energy Hub. The 75 MW/150 MWh BESS is aimed at enhancing grid stability and facilitating greater integration of renewable energy into Ireland's power network. In a bid to support Irish grid stability, Electricity Supply Board (ESB) has opened a major battery plant at its Poolbeg site in Dublin. . On Wednesday the 7th of February 2024, the ESB officially opened a major battery plant at its Poolbeg site in Dublin which will add 75MW of fast-acting energy storage, providing increased grid stability and the ability to provide more renewables on Ireland's electricity system.