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Built to store, powered by partnership – Oneida sets the standard for grid-scale battery energy storage - Electrical Business

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. Located in Haldimand County, Ontario, the 250-MW/1000-MWh facility was delivered through a collaborative partners…

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Electrical Business broke the news in on Friday, July 25, 2025.
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