Battery Energy Storage Unit – Shannonbridge

The Shannonbridge 100MW Battery Energy Storage System (BESS) has officially been energised, marking a significant milestone in the region’s energy transition. Located in an area long associated with power generation, the facility brings modern energy technology to a heritage-rich site.

The BESS supports the Irish grid under the DS3 System Services Programme, using high-power batteries to provide system reserve, smooth power fluctuations, and enhance grid stability. It enables the storage and discharge of electricity based on system needs, improving supply reliability.

Project scope included:

• Installation of 40 MVPS and battery containers
• Construction of the IPP building
• Completion of 220kV cable sealing end interface

We are proud to have managed the construction and energisation of this high-availability, low-maintenance facility. It is one of the largest operational BESS units in Ireland and part of one of the most extensive portfolios in Europe. As Ireland targets 70% renewable electricity by 2030, with an estimated 1,700MW of battery capacity needed, this project sets a strong foundation.

The completed site includes:

• Battery storage units and control buildings
• Grid connection infrastructure
• Access roads, paving, footpaths
• Drainage and landscaping works