Canadian Solar Inc. said on Tuesday that a U.S. federal court dismissed with prejudice a patent infringement lawsuit filed by Maxeon Solar Pte. Ltd., ending a dispute over three TOPCon solar cell technology patents.
The U.S. District Court for the Northern District of California ruled in Canadian Solar’s favor, rejecting Maxeon’s claims that its modules violated patented technology. The decision follows a January 2026 ruling by the Patent Trial and Appeal Board (PTAB), which issued Final Written Decisions invalidating all Maxeon patents asserted in the litigation.
The litigation originated in March 2024, when Maxeon filed suit in federal court alleging infringement of its TOPCon-related patents. Canadian Solar, which has been publicly traded on the NASDAQ since 2006, manufactures solar photovoltaic modules and provides energy storage solutions. The company operates from Kitchener, Ontario.
Colin Parkin, Chief Executive Officer of Canadian Solar, said the ruling affirms the company’s ability to compete through technology and manufacturing leadership. The Federal Circuit separately vacated the PTAB’s remaining claim portion, further consolidating the outcome in Canadian Solar’s favor.
