Trina, Tongwei unveil major, multi-billion-dollar solar silicon, wafer and cell alliance

Facebook
Twitter
LinkedIn
Reddit
Email
Image: Tongwei.

Trina Solar and Tongwei have unveiled a multi-billion-dollar collaboration which will see the two companies invest in and co-develop multi-gigawatt solar supply facilities.

Announcing a major joint venture agreement late yesterday, Trina and Tongwei said the two companies will establish projects to develop high-purity c-Si silicon rods and high-efficiency c-Si cells and wafers.

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

Trina signed the JV with two subsidiaries of Tongwei – YongXiang CO and Tongwei Solar – and the JV will collaborate on and jointly invest in facilities producing high-quality polysilicon, polysilicon rods, solar wafers and cells, with a total investment value of RMB15 billion (US$2.3 billion).

Those projects are detailed in the chart below.

Tongwei-Trina Alliance Capacity Total investment (RMB) Location Share structure Operational start
Polysilicon 40,000 tons 4 billion Baotou Tongwei 65%, Trina 35% By September 2022
Silicon rods 15GW 5 billion Leshan Tongwei 65%, Trina 35% Phase I by September 2021, 7.5GW;Phase IIBy March 2022,7.5GW
Wafers 15GW 1.5 billion Jintang County Tongwei 65%, Trina 35% Phase I by September 2021, 7.5GW;Phase II By March 2022,7.5GW
Cells 15GW 4.5 billion Jintang County Tongwei 65%, Trina 35% By October 2021,15GW

Tongwei will take a 65% share in the projects and has provided an initial registered capital of RMB3.9 billion, while Trina solar will take a 35% share with a total registered capital of around RMB2.1 billion.

Tongwei claimed that Trina Solar or its affiliates would enjoy prioritised supply of high purity c-Si, silicon rods and cells produced by all project companies.

According to Trina Solar, the joint investment agreement would help reduce the company's procurement costs and guarantee long-term stability of the supply chain. In the meantime, it would facilitate sharing upstream profits to enhance the company’s profitability. The agreement was aligned with the company's strategic plan for future development.

In addition to polysilicon, the Tongwei-Trina cooperation was also underscored by the large-scale expansion of wafer capacity. Wafers have been the common weakness between the two, as could be seen from the supply chain layouts featuring quite limited or zero wafer capacities. It was of great significance to bridge this gap.

Wafer capacities of both companies are now expected to surge thanks to this cooperation. The supply chain is to be interconnected to support silicon, wafer and cell integration to achieve optimised cost advantages, the companies said.

Wu Qun, secretary of the board of directors of Trina Solar, said that these major project investments were necessitated by Trina Solar's strategic development planning.

Trina Solar and Tongwei had marked advantages in all segments throughout the industry chain. By reaching consensus on the 210 series, this cooperation would strengthen the strategic partnership between the two.

The joint efforts had helped to foster a mature 210 series supply chain and led to deepened integration. The planned PV module capacity would top 50GW for Trina Solar, the majority of which would go to 210 modules, and Trina Solar would continue to consolidate its advantage in massive production of advanced modules made from big cells.

Trina Solar also confirmed it had signed a framework agreement with Tongwei which will see the former procure 72,000 metric tons (MT) of polysilicon from four Tongwei subsidiaries between 2021 and 2023.

Trina said it was eyeing guaranteed silicon supply in signing the contract, having witnessed pricing volatility and supply constraints in the polysilicon market earlier this year.

Prices under the contract will be negotiated on a monthly basis, with the final contract value set to be dependent on those monthly market prices.

The announcement coincided with two major supply deals also signed by Trina Solar, securing its supply of both wafers and solar glass.

20 April 2027
Istanbul, Türkiye
PV Tech has been running PV CellTech Conferences since 2016. PV CellTech Global, on 20-21 April 2027, is the meeting place for everyone invested in the growth of PV manufacturing and advancement in cell technologies, which will drive us towards the installed capacity required to power the planet by 2050. This is a gathering of key stakeholders driving capital expenditure and technologies for new PV manufacturing plants across the globe to harness the opportunities the growth of PV represents out to 2050 and beyond. The conference takes place in one conference room, where all senior peers have the same shared experience of learning and unique insight, unmatched anywhere else in the solar industry events calendar.

Read Next

Sponsored
October 27, 2026
Tongwei Solar's TNC 2.0 FULLX G12R-48 is designed for rooftop applications with varying available space and aesthetic requirements.
October 26, 2026
TNO, Perovion Technologies and Toyo Seikan have announced plans to work towards the industrialisation of perovskite solar cells.
October 26, 2026
Vikram Solar is on track to begin production of the first cells at its n-type TOPCon solar cell manufacturing facility in Tamil Nadu.
October 26, 2026
Q3 2026 was a pivotal period for the global inverter market, marked by capacity expansion in the US and a landmark regulatory shift.
October 21, 2026
China’s Ministry of Commerce is proposing to introduce export controls on key PV components, including polysilicon, wafers and cells.
Premium
October 16, 2026
Markus Beck of RCT Solutions discusses how the US PV manufacturing can be sustained beyond the current boom.

Upcoming Events

Solar Media Events
November 3, 2026
Málaga, Spain
Solar Media Events
November 24, 2026
Warsaw, Poland
Solar Media Events
February 2, 2027
London, UK
Solar Media Events
April 20, 2027
Istanbul, Türkiye