EirGrid, SONI and SEMO have introduced a significant upgrade to the electricity grid’s Scheduling and Dispatch system, opening the door for utility-scale battery storage to take a larger role in balancing power across the island of Ireland.

Known as Initiative 2 of the Scheduling and Dispatch Programme (SDP-02), the enhancement fully incorporates battery units classed as Energy Storage Power Stations (ESPS) into the real-time electricity market.

Capable of both charging and discharging, these assets will help smooth supply and demand more effectively.

Until now, most grid-scale batteries primarily supported the network by delivering stability services.

With SDP-02, they will be able to participate more actively in energy trading—charging when renewable output is high or prices are low, and releasing power during peaks—potentially displacing fossil-fuel generation.

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Operators will also be able to indicate preferred charging and discharging windows, giving grid managers better information to plan how best to meet the island’s energy needs.

Minister for Climate, Energy and the Environment Darragh O'Brien said: "The role of battery storage in Ireland’s energy needs is critical.

"The number of battery units operating in Ireland has increased over recent years, with more continuing to connect to the power system.

"These units will grow in importance as more variable renewable energy is brought onto the system. I welcome this update to increase the value and efficient utilisation of these battery units, supporting the transition to a low-carbon future by making the grid more flexible, efficient, and sustainable."

Liam Ryan, Chief Transformation, Technology and Offshore Officer at EirGrid, said: "Operating a power system with electricity generated from high levels of variable renewables, such as wind and solar, is complex and technically very challenging.

"There's a need to overcome the limitations of many established technological and operational practices, while making sure the grid remains stable and secure. After extensive engagement with industry and stakeholders, we have introduced this update to allow market participants and the control centres to realise more value from battery units."