The Mullavilly Battery Energy Storage System is a 50,000kW energy storage project located in Mullavilly, Armagh, Northern Ireland, UK.

The project was commissioned in 2021.

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The Mullavilly Battery Energy Storage System was developed by Gore Street Energy Storage Fund. The project is owned by Gore Street Energy Storage Fund (51%).

The key applications of the project are frequency regulation and grid support services.

Contractors involved

Gore Street Energy Storage Fund has delivered the battery energy storage project.

Additional information

Gore Street Energy Storage Fund has awarded fixed-price engineering, procurement and construction (EPC) contracts and long-term operations and maintenance contracts to NEC Energy Solutions, for 100MW of energy storage projects in Northern Ireland, among 100MW 50MW is Mullavilly is one. Under the EPC and operations and maintenance contracts, NEC Energy Solutions had committed to construct the projects at a fixed price by a specified completion date, to provide for performance and availability warranties and to operate the projects for up to 15 years.

51% of the project is owned by Gore Street Storage Fund plc.

About Gore Street Energy Storage Fund

Gore Street Energy Storage Fund Plc is a financial investor which provides sustainable and attractive dividend over the long term by investing in storage assets. The company is headquartered in the London, Greater London, the UK.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.