Canadian Solar unit to supply 381 MWh battery system in Michigan

Canadian Solar Inc. (NASDAQ: CSIQ) announced that its energy storage subsidiary, e-STORAGE, will supply a 75 MW / 381 MWh battery energy storage system to Apex Clean Energy in Branch County, Michigan.

The system will be co-located with Apex's existing Coldwater Solar facility. Under the agreement, e-STORAGE will deliver an integrated solution combining its SolBank 3.0 battery blocks, Power Conversion Systems, and its EQ-S Energy Management System. The batteries will use lithium-iron phosphate cells manufactured at Canadian Solar's own facilities.

Deliveries are scheduled to begin in early 2027, with commercial operation targeted for mid-2027.

Ken Young, CEO of Apex Clean Energy, said: "Power demand is rising rapidly, and storage projects like Coldwater enable our grid to keep pace. e-STORAGE has the technology and the scale to deliver this project, and we're glad to be working once again with our partners at Canadian Solar."

Jeff Roy, President of e-STORAGE, said: "Michigan is rebuilding its power generation mix on a fixed timeline, and this collaboration shows how that target turns into reliable capacity on the ground. By supplying the batteries, power conversion, and our EQ-S controls as one integrated system, we serve as Apex's single accountable technology partner across the project's lifecycle."

Michigan law requires utilities to bring 2,500 MW of energy storage online by 2030. The state's largest coal units are also scheduled to retire through 2032.

As of March 31, 2026, e-STORAGE had shipped over 20 GWh of battery energy storage solutions globally. Canadian Solar reported a $3.5 billion contracted backlog as of May 8, 2026, according to the company's press release.

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