European Patent Office upholds JA Solar patent ‘as valid’ in opposition oral proceeding

Facebook
Twitter
LinkedIn
Reddit
Email
The Changan Ford 20MW distributed PV project of Guangzhou Development New Energy Incorporation in Chongqing. Image: JA Solar.
‘The EPO has upheld the patent in accordance with the main request of JA Solar, and the independent claims of the patent have not been amended,’ said JA Solar. Image: JA Solar.

The European Patent Office (EPO) “upheld as valid” a patent held by Chinese PV manufacturer JA Solar last week, on 2 October, following the filing of a TOPCon patent infringement lawsuit.

“The EPO has upheld the patent in accordance with the main request of JA Solar, and the independent claims of the patent have not been amended,” said JA Solar in a statement; the company also noted that appeals can also be made against this decision.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

JA Solar filed two lawsuits at the German offices of the Unified Patent Court (UPC) against fellow Chinese solar manufacturer Astronergy in July, which manages disputes relating to patents for EU member states, and the patents were validated by the court earlier this year.

While JA Solar did not specify if Astronergy is the defendant in both lawsuits, it named the company as potentially infringing patent EP2787541B1, which relates to the structure of tunnel oxide passivated contact (TOPCon) solar cells. A final decision has not yet been reached on either lawsuit.

The news follows the filing of a number of lawsuits in the global solar sector. Over the summer, a lawsuit was filed against Maxeon for alleged damages to investors, and Tigo Energy filed a suit against Zhejiang Benyi for potential copyright infringement over its rapid shutdown technology. This week, Runergy called on US authorities to “cancel’ two patent infringement complaints filed by Trina Solar, as manufacturers are increasingly keen to protect what they consider to be their intellectual property from potential competitors.

The headline and opening of this story have been updated to reflect the publication of new information.

Read Next

May 27, 2026
PowerBridge Networks has acquired more than 50 Enphase Energy patents tied to distributed energy, inverter and grid infrastructure technologies.
Premium
May 11, 2026
Amid the PV industry's toughest downturn, JA Solar held its 2025 annual results briefing on May 6 2026, offering the market a key glimpse of when the sector may turn the corner.
Premium
March 12, 2026
PV Talk: 'The US is entering a pivotal moment for domestic solar manufacturing,' Swift Solar CEO Joel Jean told PV Tech Premium this week.
Premium
January 27, 2026
For the past two years, China’s PV manufacturers have been locked in a cycle of intense competition and price wars.
January 21, 2026
LONGi Green, Tongwei, JA Solar, TCL Zhonghuan and Aiko Solar are projecting a combined 2025 deficit of RMB28.9-32.8 billion (US$4.1-4.7 billion).
January 21, 2026
The USPTO has denied three challenges to patents held by US solar manufacturer First Solar pertaining to its production of TOPCon cells.

Upcoming Events

Solar Media Events
June 16, 2026
Napa, USA
Media Partners, Solar Media Events
June 30, 2026
Sacramento, California
Media Partners, Solar Media Events
August 25, 2026
São Paulo, Brazil
Media Partners, Solar Media Events
September 1, 2026
Mexico City, Mexico
Media Partners, Solar Media Events
September 9, 2026