Canada''s largest battery storage project breaks ground in Ontario
— Construction is now underway on the single largest battery storage facility ever procured in Canadian history, the Ontario government reports. Once complete, the new
July 25, 2025 – With 278 lithium-ion battery units—each weighing more than 84,000 lb—now drawing and storing power from Ontario's electricity grid, the Oneida Energy Storage Project has officially entered commercial operation, becoming the largest battery energy storage facility in operation in Canada, and among the largest globally.
It will feature approximately 400 battery containers, which are each the size of a 20-foot shipping container. EDWARDSBURGH CARDINAL, ONT. — Construction is now underway on the single largest battery storage facility ever procured in Canadian history, the Ontario government reports.
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