Defendant
1 case as defendant.
Canadian Solar Inc., commonly known as Canadian Solar, is a global renewable energy company founded in 2001 by Dr. Shawn Qu and headquartered in Kitchener, Ontario, Canada. The company has been publicly traded on NASDAQ under the ticker CSIQ since 2006. As of December 31, 2025, Canadian Solar reported approximately 12,587 employees, with a trailing 12-month revenue of $5.48 billion as of March 31, 2026, and a market capitalization of $1.13 billion as of May 20, 2026.
Canadian Solar's core operations encompass the manufacturing of solar photovoltaic (PV) modules and the provision of battery energy storage solutions. The company produces advanced N-type TOPCon solar cells and modules and offers residential energy storage products like the EP Cube, as well as utility-scale battery energy storage systems through its subsidiary e-STORAGE. Beyond manufacturing, Canadian Solar develops, builds, owns, and operates utility-scale solar power and battery energy storage projects globally through its Recurrent Energy segment. Its manufacturing facilities are located across several countries, including the United States, Canada, China, Indonesia, Vietnam, and Brazil.
In terms of patent litigation, Canadian Solar Inc. primarily operates as a defendant, reflecting the posture of an operating company defending its products and services. The company has been involved in one tracked case as a defendant and zero as a plaintiff. The sole tracked lawsuit, First Solar, Inc. v. Canadian Solar Inc., was filed in the United States District Court for the District of Delaware on May 9, 2025.
Beyond the currently tracked case, Canadian Solar has demonstrated engagement in the intellectual property landscape. For example, it previously reached a settlement agreement in a patent infringement lawsuit with Maxeon Solar Technologies in April 2022. More recently, in April 2026, the U.S. Patent Trial and Appeal Board invalidated Trina's TOPCon Patents, a development relevant to Canadian Solar's manufacturing and product offerings in solar cell technology.
First Solar, Inc. filed a patent infringement lawsuit against Canadian Solar Inc. Canadian Solar (USA) Inc. later petitioned for Inter Partes Review of US Patent 9130074 (IPR2025-01130), which the USPTO Director denied.