Canadian grid-connected battery energy storage system

4 FAQs about Canadian grid-connected battery energy storage system

What is the largest battery energy storage facility in Canada?

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 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.

What is a battery energy storage system?

Battery Energy Storage Systems (BESS) are tools that store electrical energy. Within Canada, all energy storage projects currently under construction are BESS. Proposed and under-construction projects have a power range between 1 MW and 411 MW, with an average storage capacity range of 0.5 hours to 6 hours.

Are pumped hydro and battery energy storage a new technology in Canada?

Some technologies, like pumped hydro, have a long history in Canada. Others, like battery energy storage systems (BESS) are new technologies to many and raise questions, especially as project approvals anticipate the integration of these assets into peoples' communities.