Tongwei’s latest HJT module reaches power output of 776.2W, power conversion efficiency of 24.9%

Facebook
Twitter
LinkedIn
Reddit
Email
Tongwei manufacturing.
Tongwei’s latest module is the first HJT module to exceed a power output of 775W. Image: Tongwei.

Leading Chinese module manufacturer Tongwei has set a new record for power output among heterojunction (HJT) modules, with its latest THC-G12 module delivering a maximum power output of 776.2W.

The THC-G12 module has a power conversion efficiency of 24.99%, and the latest module’s performance figures were verified by German services giant TÜV. Both power output and power conversion efficiency metrics are improvements over the company’s existing HJT modules. In June this year, the company presented its earlier generation of the THC-G12 series at the SNEC event in China, which boasted a maximum power output of 765.2W and a power conversion efficiency of 24.63%.

This article requires Premium SubscriptionBasic (FREE) Subscription

Unlock unlimited access for 12 whole months of distinctive global analysis

Photovoltaics International is now included.

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Unlimited digital access to the PV Tech Power journal catalogue
  • Unlimited digital access to the Photovoltaics International journal catalogue
  • Access to more than 1,000 technical papers
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

This is the first time an HJT module has surpassed a power output of 775W, and is the ninth time the company has broken a record in either the power output or power conversion efficiency space since 2023. While Tongwei did not specify other performance metrics for its latest module, previous versions of the THC-G12 module have had a temperature coefficient of -0.24% per degree Celsius, and a power degradation of 1% in the first year, and no more than 0.375% annual degradation in the following years.

Tongwei attributed much of these successes to the work of its global research and development (R&D) centre, which started work in June this year.

“In just four months, the R&D team increased cell efficiency by nearly 0.3% by optimising light-trapping structures and plasma-enhanced chemical vapor deposition (PECVD) uniformity, along with employing advanced materials and printing techniques, raising the module mainstream massive production power up to 745,” said Tongwei in a statement.

The news is the latest encouraging development in the HJT space, following rival Chinese manufacturer Huasun’s start of commercial production of HJT cells with a “record-breaking” power conversion efficiency of 26.5% in May this year. Further research from LONGi and the School of Materials at Sun Yat-sen University developed HJT back contact cells with an even higher power conversion efficiency of 27.09%.

10 March 2026
Frankfurt, Germany
The conference will gather the key stakeholders from PV manufacturing, equipment/materials, policy-making and strategy, capital equipment investment and all interested downstream channels and third-party entities. The goal is simple: to map out PV manufacturing out to 2030 and beyond.

Read Next

June 4, 2025
Chinese PV module manufacturer Haitai Solar has announced the termination of a 10GW TOPCon and the reallocation of investment to fund an Indonesian facility.
Sponsored
June 3, 2025
Tongwei Solar talks innovation, growth, sustainability and future technologies in the global solar PV sector.
June 2, 2025
Arctech has partnered with ACME Cleantech Solutions to provide 175MW worth of solar trackers for an upcoming facility in Duqm, Oman.
May 30, 2025
Swiss solar manufacturer Meyer Burger has abandoned module production activities at its manufacturing facility in Goodyear, Arizona, US.
Premium
May 29, 2025
PV Talk: Global Solar Council CEO Sonia Dunlop tells Shreeyashi Ojha why the solar industry needs collective action to combat political and supply-chain disruption.
Sponsored
May 28, 2025
Ben Willis speaks to Astronergy about its next-generation TOPCon offering and the advantages of its zero-busbar module design, both of which were on show at Intersolar 2025.

Subscribe to Newsletter

Upcoming Events

Solar Media Events
June 17, 2025
Napa, USA
Upcoming Webinars
June 30, 2025
10am PST / 6pm BST
Solar Media Events
July 1, 2025
London, UK
Solar Media Events
July 1, 2025
London, UK
Solar Media Events
September 16, 2025
Athens, Greece