Ireland's first four-hour battery storage system opens in Offaly
Powercomm Engineering Ltd was proud to play an integral role in the delivery of Ireland’s first four-hour grid-scale Battery Energy Storage System (BESS), developed by Statkraft at its Cushaling Wind Farm in Co Offaly.
The 22.8MW battery system represents a significant milestone in Ireland’s renewable energy transition. Capable of storing enough clean electricity to power approximately 10,000 homes for a full four-hour period, the project marks a major evolution from short-duration storage solutions to long-duration energy resilience.
Located adjacent to Statkraft’s 55.8MW Cushaling Wind Farm, the battery system enhances the flexibility and stability of Ireland’s electricity grid. With response times of less than one tenth of a second, the system can be called upon instantly by EirGrid to support grid stability during fluctuations in supply and demand.
Reducing Renewable Energy Waste
Each year, between 10% and 14% of available wind energy in Ireland is curtailed — meaning turbines are temporarily switched off when demand is low. Long-duration battery storage addresses this challenge by capturing excess renewable generation and redistributing it during periods of higher demand.
By bridging the gap between peak generation and peak consumption, the Cushaling BESS strengthens grid resilience, reduces renewable energy waste, and supports the long-term goal of lowering electricity costs.
A Hybrid Clean Energy Hub
The Cushaling site is evolving into a fully hybridised clean energy hub, combining wind generation, long-duration battery storage, and planned solar development. This integrated approach reflects the future of renewable infrastructure in Ireland — where multiple technologies work together to optimise clean energy output and grid performance.
Powercomm’s Role
Powercomm was an integral part of this landmark project, supporting the successful delivery of critical electrical infrastructure required to bring the system online safely and efficiently. Our involvement in this pioneering development reflects our continued commitment to enabling Ireland’s transition to a more flexible, low-carbon energy system.
As battery technology advances and long-duration storage becomes increasingly important to national grid strategy, projects like Cushaling demonstrate how engineering expertise and collaborative delivery can accelerate meaningful progress.
We are proud to support forward-thinking partners like Statkraft in developing infrastructure that strengthens communities, enhances energy security, and powers Ireland’s sustainable future.