Stock code: 688599 Stock abbreviation: Trina Solar Announcement No.: 2025-036

Convertible bond code: 118031 Convertible bond abbreviation: day 23 convertible bond

Trina Solar Co., Ltd

Voluntary Disclosure Announcement on Patent Technology Cooperation

The board of directors and all directors of the company guarantee that there are no false records, misleading statements or material omissions in the content of this announcement, and assume legal responsibility for the authenticity, accuracy and completeness of its content in accordance with the law.

Important Content Notes:

Trina Solar Co., Ltd. (hereinafter referred to as the "Company") recently entered into an agreement with Global Perovskite/Crystalline Silicon Solar

Oxford Photovoltaics Ltd. (hereinafter referred to as "Oxford Photovoltaic"), a leading pool technology company, has officially entered into a contract

Exclusive patent license agreement, through this cooperation, the company obtained R&D, manufacturing and sales in Chinese mainland

Selling, offering to sell, use, and distribute perovskite/perovskite stacks based on Oxford photovoltaic perovskite cell technology

Exclusive licensing of photovoltaic products for layer technology and perovskite/crystalline silicon tandem cell technology, as well as local production

Manufacturer's exclusive right to sublicense.

This cooperation does not need to be submitted to the company's board of directors and shareholders' meeting for deliberation.

In the process of cooperation between the two parties, in case of changes in the market environment, industry policy adjustments, force majeure and other factors

may result in the cooperation not being fulfilled as scheduled or in full. The company will be based on the progress of the cooperation

In accordance with the requirements of relevant laws and regulations, we will fulfill the corresponding decision-making approval procedures and information disclosure obligations

Investors should be aware of the investment risks.

1. Overview of cooperation

The company has recently reached an exclusive patent license agreement with Oxford Solar, a global leader in perovskite/crystalline silicon solar cell technology. As a global technology leader in the field of perovskite solar cells, Oxford PV is a spin-off company of the University of Oxford, and is the first enterprise to focus on the R&D and mass production of perovskite/crystalline silicon tandem cells, and has taken the lead in creating world records of 27.3%, 28% and 29.5% efficiency of small-area tandem cells in the world in 2018, 2019 and 2020, and the first to prepare tandem cells on 158.75mm industrial silicon wafers. In 2024,

The 1.7m2 laminated modules it manufactures are certified to be 26.9% efficient. At the same time, Oxford PV has laid out core patents in the field of perovskite.

Through this cooperation, the Company has obtained an exclusive license to develop, manufacture, sell, offer to sell, use and distribute photovoltaic products based on Oxford PV perovskite cell technology and perovskite/perovskite tandem technology and perovskite/crystalline silicon tandem cell technology in Chinese mainland, as well as the exclusive right to sublicense to local manufacturers.

This cooperation does not need to be submitted to the company's board of directors and shareholders' meeting for deliberation.

2. Basic information of the partner

(1) Company name: Oxford Photovoltaics Ltd.

(2) Type of enterprise: private limited company (foreign holding)

(3) Date of establishment: 2010

(4) Office: Unit 7–8 Oxford Pioneer Park, Mead Road, Yarnton, Kidlington,

Oxon OX5 1QU

(5) Main business: Focus on the development and commercialization of a perovskite-based solar energy technology

3. The impact of this cooperation on the company

Since 2014, the company has been deeply deploying perovskite tandem technology, and has applied for a total of 331 patents in the field of perovskite tandem technology. Recently, the company's research and development of 210 large-size perovskite/crystalline silicon two-terminal tandem cell modules with a peak power of 808W, becoming the world's first industry-standard size photovoltaic module product with a power exceeding the 800W threshold, creating a new world record and making epoch-making significance in the field of perovskite/crystalline silicon tandem technology.

The in-depth cooperation between the company and Oxford PV will give full play to the advantages of both parties in technology and resources, and achieve complementary advantages, which is in line with the company's long-term development strategic plan. With its high conversion efficiency and broad application prospects, perovskite tandem technology will become the core development direction of the next generation of photovoltaic technology. Through this cooperation, the company has laid a solid foundation for promoting the R&D and industrial application of perovskite tandem technology in China, which is expected to reshape the development pattern of the photovoltaic industry and accelerate the global energy transition.

At the same time, this cooperation marks that the industrialization process of the company's perovskite tandem technology has entered a substantial promotion stage. The company will give full play to its global brand channel advantages, manufacturing management advantages in the industry and comprehensive operation and management advantages of industry leaders, and combine with the cutting-edge technology of Oxford Photovoltaic to truly realize scientific and technological innovation and industry

The deep integration of innovation continues to lead the development of the industry.

4. Risk Warning

In the process of cooperation between the two parties, if affected by changes in the market environment, industry policy adjustments, force majeure and other factors, the cooperation may not be performed as scheduled or in full. According to the progress of cooperation, the company will fulfill the corresponding decision-making approval procedures and information disclosure obligations in accordance with the requirements of relevant laws and regulations, and investors are requested to pay attention to investment risks.

The announcement is hereby made.

Board of Directors of Trina Solar Co., Ltd

April 10, 2025