Japanese power company Mitsubishi Power is to develop four battery energy storage system (BESS) projects in Ireland in partnership with renewable energy developer ION Renewables.

Ion Renewables entered an exclusivity agreement with Mitsubishi Power Americas for the four projects, which will use Mitsubishi’s Emerald storage solutions and have 185.5MW or 371MWh of total capacity.

The BESS projects will be developed at brownfield sites with existing electrical interconnects.

They are expected to offer Secure, Sustainable Electricity System (DS3) energy storage and system services such as frequency and capacity response to the national grid.

Mitsubishi Power has also signed a ten-year service agreement for the projects.

Ion Renewables director John Ward said: “We are delighted to be working with the Mitsubishi Power team to deliver these important projects.

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“These installations represent a viable and economical solution to balance the network, strongly aligning with the principles of the REPowerEU draft directive.

“These projects demonstrate that effective solutions for storing energy can be achieved by utilizing renewable power that would otherwise be curtailed.”

Scheduled to come online in 2024, the four BESS projects will support Ireland’s Climate Action Plan, which aims to achieve net-zero greenhouse gas emissions by 2050.

The projects will also support EirGrid Group’s DS3 programme, which aims to address the challenges of integrating clean energy generation into the grid and securing 70% of Ireland’s electricity from renewable sources by 2030.

They will increase Mitsubishi Power’s global deployment of its Emerald storage solutions to more than 2GWh.

Mitsubishi Power Americas Energy Storage Solutions senior vice-president Tom Cornell said: “The continued adoption of battery storage technologies outside of the US and the recognition of the important role they play in enabling renewable energy generation to reach net-zero cannot be overstated.

“Mitsubishi Power’s Emerald storage solutions will help Ireland reach its goal of 70% generation from renewable sources while ensuring the stability of the grid with a secure power system.”