First Solar Sues JA Solar Over TOPCon Technology Patent Infringement

Key Facts

First Solar has filed a patent infringement lawsuit against JA Solar regarding TOPCon solar cell technology. Investing.com reported that the legal action concerns the unauthorized use of First Solar's patented Tunnel Oxide Passivated Contact technology, which is critical for high-efficiency cell designs.

The lawsuit aims to safeguard the company's intellectual property rights within the increasingly competitive solar technology sector. In the equity markets, FSLR closed at $175.16 on September 30, 2026, having traded between a session low of $174.83 and a high of $178.68.