Mr. Liu Shuqi, Chairman and CEO of Tongwei Company Limited, attended the meeting and delivered a speech. As the rotating chairman of the conference, Mr. Liu Shuqi warmly welcomed the guests to the conference. China's photovoltaic (PV) industry has gone through many cycles, from following suit to taking the lead, and has become a veritable “China business card”. Technological progress is the key factor driving the PV industry forward. Among the many technical routes, heterojunction technology has formed differentiated advantages with its excellent surface passivation effect, low temperature coefficient, high double-sided rate and excellent low irradiation response.

Chairman Liu Shuji said that Tongwei is a pioneer in the research and development of heterojunction technology. It has been actively laying out heterojunction technology research and development since 2018. The core technologies of Tongwei, such as double-sided microcrystalline, copper interconnect, and 0BB technology, are the three major “tools” to promote the heterogeneous junction technology to reduce costs and increase efficiency, and realize large-scale mass production. At the end of October this year, the highest output power of Tongwei's heterojunction modules reached 776.2 watts, and the efficiency of the modules reached 24.99%, which is the ninth time to set a new record.

Dr. Xing Guoqiang, Chief Technology Officer of PV of TONGWEI, hosted the meeting. During the meeting, Dr. Xing Guoqiang had an in-depth discussion with the guests on topics such as heterojunction module testing, wafer size, and market outlook. Regarding the future development of heterojunction, Dr. Xing Guoqiang especially pointed out that the technological upgrading space of heterojunction determines its future development potential, and promoting the progress of heterojunction industry requires the joint efforts of the industry to create a better industry ecology.

During the conference, Mr. Liu Shuqi, Chairman of the Board of Directors of TÜV Rheinland, had an in-depth discussion with the guests on heterojunction technology and the current market situation. When talking about how to utilize the role and value of heterojunction, Li Weichun, Vice President of TÜV Rheinland's Global Power Electronics Service, said that innovation is the source of development, and that heterojunction technological innovation can be used to enhance the advantages from the three aspects of cost reduction, efficiency, and quality improvement.

Mr. Wang Xin, Chairman of Lian Sheng Photovoltaic Technology Co., Ltd. said that the value of heterojunction technology needs to be truly enhanced, which can be optimized in four aspects: market promotion, brand publicity, supply chain management and technical synergy, and that Lian Sheng is willing to strengthen the cooperation with all the units to help heterojunction technology reduce costs and increase efficiency. Mr. Zhang Zhongwei, Chief Scientist and Director of New Energy Research Institute of Guosheng Technology, expressed his hope to contribute more to the progress of heterojunction technology and increase the market share of heterojunction together with all of you here.

Dr. Gao Qi, TÜV Rheinland Greater China's technical expert for solar and commercial products, shared “TÜV Rheinland Heterojunction (HJT) Photovoltaic Module Electrical Performance Measurement Data Analysis and Test Process R&D Progress”. Heterojunction technology needs to demonstrate its advancement in terms of performance and reliability in order to gain market acceptance and expand its share. At this stage, the comprehensive performance parameters of heterojunction in the market are affected by different processes, equipment, and production procedures, etc., and the efficiency and performance of HJT modules from leading module manufacturers are significantly better than the market average. In the future, we hope to strengthen cooperation with various organizations in HJT measurement, testing and related standards.

Dr. Xing pointed out that cost reduction in heterojunction technology is important, but perhaps efficiency improvement is more important. If efficiency is not improved, the differentiation advantage of heterojunction technology will no longer be significant. Dr. Jiang Fangdan, Director of PV Research Institute of PV Technology Center of Tongwei Company, believes that it would be more reasonable to explain the substability of heterojunction technology in terms of working state.

Xu Xin, Senior Vice President of Anhui Huasheng New Energy Technology, said that although the advantages of heterojunction technology in the large version, especially in including ground power plants are very significant, but also need to improve the competitiveness of the small version to fight for this part of the market. According to Zong Jun, CEO of Guodian New Energy, it is hoped that all units will cooperate to improve the reliability test and other standards of heterojunction modules, so as to enhance the competitiveness of module products.

In the exchange discussion on the topic of “Heterojunction Outdoor Empirical Data”, Xu Xin, Vice President of Huasheng, said that whether in high temperature or relatively low temperature areas, heterojunction components have good outdoor performance in terms of power generation, attenuation rate, double sided rate, low light response, and so on, and so heterojunction products have a high degree of acceptance in overseas.

Lei Xinyue, president of QuanWei Technology, said that heterojunction is now emerging as a separate segment in the domestic large-scale project bidding and procurement. Heterojunction products in the outdoor, agriculture, marine and other fields also have more achievements, which makes heterojunction in the application of PV module selection advantages more prominent.

Xia Zhengyue, Minister of PV Technology Center of Tongwei Company, and Dr. Long Wei, Minister of PV Technology Center of Tongwei Company, attended this roundtable. At the meeting, Dr. Long Wei gave a speech on “Heterogeneous Junction Cell Production Unit Consumption Benchmarking”, which provided ideas for technological improvement of the production line by benchmarking the key indexes, water consumption and other production data of some enterprises. Wang Jilei, CTO of Anhui Light Potential New Energy Technology Co., Ltd. said that the key indexes of heterojunction technology need to be optimized, and the subsequent enhancement of technology can improve the efficiency of production lines and reduce production costs.

Dr. Yang Bochuan, President of Orient Sunrise Global Photovoltaic Research Institute, gave a speech on “Optimal Size of Heterojunction Cell Modules and Its Impact on Crystal Pulling, Module and Cell Side”, analyzing the wafer size and development trend. Under the existing specifications of crystal pulling, cell and module size, it is necessary to seek larger wafer size to increase module power.

Dr. Xing said that a more in-depth analysis of wafer size can be carried out to explore the optimal size in terms of wafer pitch and other indicators, so as to avoid repeating technical reforms caused by subsequent size upgrading again.

Participants shared their views on “Market Acceptance of HJT and Market Outlook”. Mr. Xu Xin, Vice President of Huasheng, believed that heterojunction is facing an unprecedented opportunity to go to the sea in light of the feedback from customers in the European market. Mr. Zong Jun, CEO of Guodian New Energy Technology, agreed with this view and pointed out that the improvement of heterojunction module efficiency is especially important for large-scale ground power plants.

Mr. Zeng Qingzhi, Chairman of Zhejiang Runhai New Energy Co., Ltd. said that to improve the market share of heterojunction, it is necessary to make group efforts and promote technological progress by opening up the upstream and downstream. Li Changhong, CEO of Zhuhai Hongjun New Energy Co., Ltd. believes that the roundtable has boosted the industry's confidence in heterojunction technology, and hopes that the technical advantages accumulated by various units can jointly help the industry progress. Qiu Wenkai, Executive General Manager of Guangdong Ming Yang Volkswagen Industry Co., Ltd. said that heterojunction market share can be increased through a variety of solutions such as new power reforms and high-speed photovoltaics.

Ye Dongting, Deputy General Manager of Shanghai Hengxi Photovoltaic Technology Co., Ltd. expressed the hope that industry leaders can share more technology to promote the entire heterojunction industry to reduce costs and increase efficiency, and War Zigang, Vice President of Procurement Center of King Kong Photovoltaic Co. Guo Wanwu, Deputy General Manager of CNBM Junkin Technology Co., Ltd, believes that technology cost reduction should cover upstream and downstream, and that reducing fixed investment will help to enhance the willingness to invest in heterojunction.

Talking about the patent risk of heterojunction, which has received much attention in the industry, Dr. Jiang Fangdan believes that the reasons leading to patent wars are more complicated, but it seems that the patent risk of heterojunction is still at a relatively low level at present. Liu Chang, executive secretary-general of High-Efficiency Heterojunction Club and founder of SOLARZOOM, said that the external situation, especially the necklace of technical patents, will be further amplified, so based on this background, the heterojunction has a relatively outstanding advantage in patents, and the subsequent in the PV market, especially in the overseas market, can give full play to the potential and value of the belief that there will be more companies to join the heterojunction camp. It is believed that more companies will join the heterojunction camp.

At the end of the meeting, Mr. Liu Chang, the executive secretary-general, announced that Ming Yang PV would be the next rotating chairman unit, and hoped that all the guests would gather in Zhongshan next time for more in-depth exchanges on the overall situation of the annual summary and the outlook for the new year.

During this roundtable, Tongwei also invited the guests to visit the showroom of Tongwei Global Innovation R&D Center to gain a deeper understanding of the layout and achievements of Tongwei's PV technology research and development.

With the successful conclusion of the 8th Roundtable Meeting of China PV Solar High-Efficiency Heterojunction 740W+ Club, we witnessed the positive actions of Chinese enterprises in the field of PV heterojunction and their firm confidence in the future development of heterojunction. The meeting also conveyed to the whole PV industry the attitude of cooperation and the temperature of future expectation of many PV leading and elite enterprises. Leaders, outstanding talents and experts from the heterojunction industry had an in-depth discussion on a number of related topics, which provided further guidance for the development direction of the industry and contributed to the formulation of industry specifications from multiple perspectives, fully demonstrating the profound strength of China's photovoltaic industry in technological research and development, its exuberant vitality in commercial practice, and its outstanding leadership in industrial development.