Canadian Solar defendants

Canadian Solar Inc. (NASDAQ: CSIQ) is a global renewable energy company founded in 2001 by Dr. Shawn Qu. Headquartered in Kitchener, Ontario, Canada, the company operates as a publicly traded entity on NASDAQ. As of December 31, 2025, Canadian Solar reported approximately 12,587 employees.

Canadian Solar manufactures solar photovoltaic (PV) modules and provides battery energy storage solutions. Its product lines include monocrystalline and polycrystalline photovoltaic modules, inverters, and complete photovoltaic systems for residential, commercial, and utility-scale applications. The company is also involved in developing, building, and connecting utility-scale solar power and battery energy storage projects globally. Canadian Solar has manufacturing facilities in countries including the United States, Canada, China, Indonesia, Vietnam, and Brazil.

Canadian Solar is an operating company that has been a defendant in patent litigation. The company is currently tracked as a defendant in one case in the US International Trade Commission (ITC). This aligns with its posture as an operating company that defends against assertions of patent infringement rather than initiating suits as a plaintiff.

The notable tracked case is Trina Solar v. Canadian Solar defendants, initiated on October 23, 2024, in the US International Trade Commission. This case involved allegations of infringement related to TOPCon (Tunnel Oxide Passivated Contact) solar cell technology. While parallel proceedings were also filed in the US District Court for the District of Delaware, the ITC investigation was terminated. The patents asserted by Trina Solar in this dispute were subsequently challenged and all claims were held unpatentable by the Patent Trial and Appeal Board (PTAB) of the USPTO in April 2026, effectively halting the infringement proceedings.