At the 2025 SNEC exhibition in Shanghai, LONGi, a global leader in PV technology innovation, and TÜV Rheinland, the international independent third-party testing, inspection, and certification organization, signed a strategic cooperation agreement. This marks the beginning of a new chapter of high-quality collaboration between the two parties in the solar photovoltaic sector. The agreement was signed by Mr. Li Weichun, Vice President of Global Power Electronics Business Segment and Vice President of Solar & Commercial Products Greater China at TÜV Rheinland, and Mr. Dennis She, Vice President of LONGi.
Reshaping PV Industry Quality Benchmarks, Delivering Higher Value to the Market
This partnership will focus on areas including Back Contact (BC) photovoltaic cell and module standard development, product reliability research, and quality control during module mass production. Using high-quality BC products as an anchor point, the collaboration aims to establish new quality benchmarks for the entire PV industry and deliver higher lifecycle commercial value to global markets and customers. Since last year, LONGi's HPBC 2.0 module, Hi-MO 9, underwent a series of complex and rigorous professional tests under TÜV Rheinland's evaluation criteria. Its outstanding power generation performance earned it TÜV Rheinland's "All Quality Matters Award" for both "Power Generation Simulation" and "Module Reliability." Additionally, TÜV Rheinland professionally certified the superior low-light performance of LONGi's BC products, with test results showing the Spectral Response Rate of LONGi's HPBC 2.0 products significantly outperforms TOPCon products, leading by up to 44%.
A More Excellent Supply Chain Management System, More Reliable Quality Assurance
At the exhibition, TÜV Rheinland also awarded LONGi the "AA-Rated Certification for PV Supply Chain Traceability Management System." Subjected to strict assessment criteria, LONGi achieved the highest AA rating across all supply chain stages – polysilicon, ingot, wafer, and module – demonstrating exceptional supply chain management. This provides robust systemic assurance for the high-quality and high-efficiency performance of LONGi's BC products throughout their lifecycle. This honor reflects LONGi's core strengths cultivated over years: full industry chain synergy, digital empowerment, and continuous capability building.
Moving forward, the two parties will integrate their strengths for comprehensive cooperation in enhancing PV product reliability, researching, developing, and upgrading cutting-edge technologies, and formulating international standards. Together, they will empower and drive global sustainable development with higher-quality, higher-value solutions.
About TÜV Rheinland
TÜV Rheinland is one of the world's leading providers of testing and inspection services, with annual revenues of over 2.7 billion euros and approximately 26,000 employees in more than 50 countries. Its highly qualified experts test technical systems and products, enable innovation, and assist companies in their transition toward greater sustainability. They train professionals across numerous fields and certify management systems to international standards. With exceptional expertise in areas such as mobility, energy supply, infrastructure, and beyond, TÜV Rheinland provides independent quality assurance—not least for emergent technologies such as green hydrogen, artificial intelligence and autonomous driving. In doing so, TÜV Rheinland contributes to a safer and better future for everyone.
About LONGi
Founded in 2000, LONGi aims to be the world's most valuable solar technology company, driving comprehensive energy transition through customer-centric innovation.
As a global industry leader, LONGi invested CNY 5.014 billion in R&D in 2024, representing 6.07% of annual revenue, maintaining technological leadership with dual world efficiency records in monocrystalline silicon single-junction cells and perovskite-silicon tandem cells. LONGi leads in ESG performance with its 2024 MSCI rating upgraded to BBB, achieving the highest ESG scores among A+H-listed semiconductor companies and ranking first in the photovoltaic sector. As China's first PV enterprise to join RE100, EP100, EV100 and SBTi initiatives, LONGi remains committed to advancing green development and building a carbon-neutral future. www.longi.com
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