Northland Power has announced that the 250MW Oneida Energy Storage Project (Oneida) has successfully 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, according to Northland.
Christine Healy, president & chief executive of Northland, said: “Today marks a major milestone for Northland and the Oneida project.
“Oneida represents a pivotal step in our strategy to develop and operate battery storage facilities. A first-of-its-kind in Canada, this facility supports grid stability and reliability in Ontario.
“Delivering this project ahead of schedule and under budget is a clear demonstration of Northland’s capability to execute large-scale energy projects safely and effectively.”
Located in Haldimand County, Ontario, Oneida is a 1000MWh battery storage facility. It is Northland’s first operational energy storage project in Canada.
The project positions the company as a market leader in a key growth segment, offering immediate scale and presence.
Northland owns approximately 70% of Oneida, with the remaining ownership held by Six Nations of the Grand River Development Corporation, NRStor, Aecon Concessions and Mississaugas of the Credit Business Corporation.
The project was completed with a final cost of approximately CAN$700m, compared to the initial CAN$800m estimate at financial close in 2023.
Oneida is backed by a 20-year capacity contract with Ontario’s Independent Electricity System Operator.


