On June 3-4, at the 2026 SNEC exhibition, Tongwei's photovoltaic R&D achievements reached a highlight moment. Multiple authoritative institutions, including the National Photovoltaic Quality Inspection Center (CPVT), China National Testing & Certification Group (CTC), and TÜV Nord, successively presented Tongwei with a series of major certifications and awards, confirming the outstanding performance and enduring value of Tongwei modules across all scenarios from the dimensions of long-term empirical reliability, extreme environment adaptability, and international standard compliance.

1

Dual Certifications

Leading the Industry in Reliability and Efficiency

At the exhibition, the National Photovoltaic Quality Inspection Center (CPVT) presented Tongwei with the "Certificate of Conformity Verification Test for Crystalline Silicon PV Module Energy Efficiency Grade (Mandatory National Standard)" and the "Certificate for Ultra-Long-Term Stable and Reliable Operation of TNC Products at CPVT Empirical Base." Bao Jun, Dean of Wuxi Inspection, Testing and Certification Research Institute and Director of the National Solar PV Product Quality Inspection and Testing Center, attended and presented the certificates. Xing Guoqiang, Chief Technology Officer of Tongwei Co., Ltd. PV Division, and Fan Hualong, Head of System Empirical Projects at Tongwei PV Technology Center, received the certificates on site.

The National Photovoltaic Quality Inspection Center (CPVT) presents Tongwei with the

"Certificate of Conformity Verification Test for Crystalline Silicon PV Module Energy Efficiency Grade (Mandatory National Standard)"

The National Photovoltaic Quality Inspection Center (CPVT) presents Tongwei with the

"Certificate for Ultra-Long-Term Stable and Reliable Operation of TNC Products at CPVT Empirical Base"

Based on three years of rigorous outdoor test data from three empirical bases in Yinchuan, Yantai, and Hainan, it has been proven that Tongwei's TNC series products possess ultra-long lifespan and stable power generation capabilities under various extreme climates. Meanwhile, Tongwei's THC modules not only lead in power output but also meet the national mandatory energy efficiency standard requirements in terms of product reliability. After multiple rounds of comprehensive environmental stress assessments including UV, DH, HF, TC, and load testing, they have achieved the highest Level 1 energy efficiency rating.

These two authoritative certifications fully demonstrate Tongwei's comprehensive technical strength centered on "reliable durability" and "efficient power generation," continuously providing dual guarantees for customer value and industry development.

2

Mohe Empirical Validation

Breaking Through Performance in Extreme Cold

At the same time, China National Testing & Certification Group Co., Ltd. (CTC) presented Tongwei with the "Outstanding Performance Award in Extreme Cold Environments." Zhang Qinghua, Member of the Party Committee and Deputy General Manager of CTC, attended the award ceremony. Xing Guoqiang, Chief Technology Officer of Tongwei Co., Ltd. PV Division, received the certificate on site.

China National Testing & Certification Group Co., Ltd. (CTC)

awards Tongwei the "Outstanding Performance Award in Extreme Cold Environments"

The outstanding performance and reliability demonstrated by Tongwei PV modules in extremely cold environments prove their strong adaptability under harsh conditions. This award is an authoritative endorsement of Tongwei products' adaptability to extreme environments, verifying that Tongwei modules—from materials and structure to manufacturing processes—can withstand extreme climate challenges. It significantly expands the application boundaries of photovoltaic technology, providing solid technical and quality confidence for large-scale PV power stations in high-cold and high-altitude regions.

3

Leading International Standards

R&D System Certified by TÜV Nord

During the exhibition, TÜV Nord presented Tongwei with the "TNC 3.0 PV Module IEC TS 63126:2025 Certificate" and awarded Tongwei the certification for the "Yancheng PV Outdoor Performance Testing Base." Xu Tingting, Senior Vice President of Global Renewable Energy, President of Global Smart Energy Center and Vice President of Greater China at TÜV Nord, attended the award ceremony. Xing Guoqiang, Chief Technology Officer of Tongwei Co., Ltd. PV Division, and Fan Hualong, Head of System Empirical Projects at Tongwei PV Technology Center, received the certificates on site.

TÜV Nord presents Tongwei with the

"TNC 3.0 PV Module IEC TS 63126:2025 Certificate"

Tongwei receives TÜV Nord's certification for the

"Yancheng PV Outdoor Performance Testing Base"

Tongwei's complete closed-loop development process of "design & R&D — laboratory verification — outdoor real-scene validation" has gained international authoritative recognition. This empirical system provides solid data support for product R&D, reliability verification, and performance assessment, not only proving that Tongwei's R&D system possesses standardized, internationalized, and high-precision verification capabilities, but also further consolidating its technical guarantee in terms of continuous product iteration and long-term value commitment.

The multiple authoritative recognitions received at this SNEC exhibition represent a concentrated affirmation of Tongwei's current technical strength and product quality by industry authorities. Tongwei will continue to leverage its full-industry-chain synergy advantages, uphold the long-termism R&D philosophy, and continuously provide customers with PV products that deliver lower LCOE and greater reliability across the full lifecycle, driving global energy transition forward with steady and sustained progress.