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.
What is Canadian energy storage?
The blueprint for Canadian energy storage. Located in Haldimand County, Ontario, Oneida Energy Storage is a fully operational, 250 MW/1,000 MWh lithium-ion battery energy storage facility. It represents Canada's largest operational energy storage facility, and is amongst the largest energy storage projects globally.
Where is Canada's largest battery storage facility located?
The Oneida Energy Storage Project, Canada's largest grid-scale battery storage facility and one of the largest globally, has officially begun commercial operations. Located in Haldimand County, Ontario, the 250-megawatt (MW) / 1,000-megawatt-hour (MWh) facility is powered by 278 Tesla Megapacks.
What is Canada's first battery energy storage facility?
TORONTO, May 7, 2025 – The Oneida Energy Storage Project (“Oneida”) has officially entered commercial operations, becoming the largest battery energy storage facility in operations in Canada, and one of the largest globally Follow along for a behind-the-scenes look at building Canada's first battery energy storage facility.
Will Ontario's biggest energy storage plant spark a grid revolution?
Ontario will switch on the country's biggest energy storage facility next summer, taking a key step in transforming an aging electricity network aiming to be net-zero by 2035 — and one that could spark the grid revolution the province needs. Aerial view of the Oneida energy storage project, Canada's biggest battery plant, in southwest Ontario.
What is the fastest growing energy storage technology in Canada?
BESS is the fastest growing energy storage technology in Canada and is also the dominant storage technology in terms of capacity and number of sites. All but four projects proposed to be commissioned by 2030 are battery storage, with two CAES and two PHS projects also proposed.
The Oneida Energy Storage Project has officially commenced commercial operations. The project was completed ahead of schedule and under budget and is the largest battery energy storage facility in operation in Canada.