Portions of Trina Solar TOPCon Patents Deemed ‘Unpatentable’

Why It Matters

The invalidation weakens Trina’s leverage over rival manufacturers, potentially lowering licensing costs and accelerating adoption of TOPCon modules. It also signals heightened scrutiny of solar patents, influencing future IP strategies across the industry.

Key Takeaways

• USPTO declared portions of Trina’s TOPCon patents unpatentable.
• Runergy and Canadian Solar cleared of infringement under the decision.
• Adani Green previously settled with Trina; its case remains unaffected.
• First Solar’s Sec. 337 investigation now targets Trina and other rivals.
• Patent validity debate may reshape competitive dynamics in the solar market.

Pulse Analysis

TOPCon (Tunnel Oxide Passivated Contact) technology has become a cornerstone for high‑efficiency silicon solar cells, promising lower recombination losses and higher energy yields. Trina Solar, through a licensing arrangement with Evervolt Green Energy, has long positioned its TOPCon patents as a competitive moat, filing infringement suits against several manufacturers. The recent USPTO decision, however, struck down critical claims in both U.S. Patents 9,722,104 and 10,230,009, effectively eroding that moat and setting a precedent for how narrowly the Patent Trial and Appeal Board will interpret patent eligibility in the solar sector.

For Runergy and Canadian Solar, the ruling removes a legal cloud that could have hampered supply‑chain continuity and market expansion, especially in regions where U.S. customs enforcement is a concern. Without the threat of a Sec. 337 exclusion order, these firms can continue importing TOPCon‑based modules without additional licensing fees, potentially translating into modest cost reductions for downstream installers. The decision also underscores the risk for companies relying heavily on a limited patent portfolio to extract royalties, prompting a shift toward broader R&D investment and cross‑licensing arrangements.

The broader industry narrative now pivots to First Solar’s active Sec. 337 petition, which targets a swath of competitors, including Trina. This move suggests that the battle over TOPCon IP is far from over and may evolve into a multi‑player contest where patent validity, licensing strategies, and antitrust considerations intersect. Stakeholders should monitor forthcoming rulings closely, as they will shape the cost structure, competitive dynamics, and innovation pathways for next‑generation solar technologies.