Energetica India Magazine

CEO Zealwe Tech DR. ZHIGANG LIU Q Could you begin by telling us about Zealwe Tech and its presence in India? Dr. Zhigang Liu: Zealwe Tech was established in 2012 with a clear mission to prevent poor-quality solar modules from entering the market and to ensure that every module main- tains high performance throughout its operational life. From the beginning, we have focused on developing reliable testing equipment for photovoltaic (PV) modules, with all our sys- tems designed and manufactured in-house. Today, our equipment is used by customers across India, Tur- key, the United States, and several other markets. In India alone, we have supplied more than 500 testing systems to over 50 customers. We are proud to support Indian manufacturers in building world-class testing laboratories and improving the quality and reliability of their products. Q As manufacturers transition to high-efficiency technol - ogies such as TOPCon, HJT, BC and tandem cells, how do you see the role of advanced testing and quality assurance evolving? Dr. Zhigang Liu: Higher efficiency is undoubtedly the future of the solar industry, and technologies such as TOPCon, HJT, BC and tandem cells are driving significant improvements in module performance. However, efficiency alone is not enough. Reliability remains the most important factor because a high-efficiency module must continue delivering that perfor - mance throughout its entire service life. As technologies become more advanced, manufacturers need equally advanced reliability testing to identify potential deg- radation mechanisms early. Our focus is on developing testing solutions that help manufacturers validate long-term product reliability while adopting new technologies. Q What are the biggest challenges solar manufacturers face in maintaining consistent module quality at giga- watt-scale production capacities? Dr. Zhigang Liu: One of the biggest challenges is balancing cost competitiveness with product reliability. Manufactur- ers are under constant pressure to reduce production costs, which often involve negotiating with suppliers or selecting lower-cost materials. However, if material quality changes without adequate vali- dation, it can directly affect module reliability. At GW-scale production, even a small quality issue can impact thousands of modules every day, resulting in significant financial losses. Our testing equipment helps manufacturers evaluate materi- als, components and production processes so they can achieve both cost efficiency and consistent product quality. Q As module technologies become more sophisticated, what new testing technologies have emerged compared to five years ago? Dr. Zhigang Liu: The industry’s focus on reliability has led A s technologies become more advanced, manufacturers need equally advanced reliability testing to identify potential degradation mechanisms early. Our focus is on de- veloping testing solutions that help manufacturers validate long-term product reliability while adopting new technol- ogies, said Dr. Zhigang Liu, CEO, Zealwe Tech, in an inter- view with Energetica India. 38 energetica INDIA- Jul-Aug_2026 INTERVIEW