Patent Trial and Appeal Board (PTAB)

The Patent Trial and Appeal Board issued Final Written Decisions on April 17, 2026 invalidating all claims of two U.S. patents covering TOPCon solar cell technology that Trina Solar had asserted against Canadian Solar subsidiaries in a dispute seeking over $144 million in damages.

The PTAB issued final written decisions invalidating all claims in two Trina Solar patents covering TOPCon solar cell technology, handing a major win to competitors Runergy and Canadian Solar in a patent battle spanning the ITC, Delaware, and California.