At present, the concept of heterojunction is in full swing in the market. Under extreme assumptions, some people in the industry have begun to calculate the possibility that the cost of heterojunction equals PERC. However, it seems that professional battery companies and second-tier companies are The advancing speed of junction technology is significantly faster than that of the head vertical integration giant.
Heterojunction solar cells were first developed by Sanyo Corporation of Japan in 1990. The early equipment was mainly imported. The earlier Chinese companies were Hanergy, Junshi, Jinneng, and Zhongzhi. The production scale is small and belongs to small With the localization of heterojunction equipment, China’s domestic battery companies, especially the second- and third-tier companies, have announced their intention to enter the market. The current capacity planning in China has exceeded 50GW. The battery industry generally predicts that heterojunction batteries The conversion efficiency will exceed 25% in the short to medium term.
However, although there are many companies that plan to invest in heterojunction batteries and conduct research on them, few have actually produced results, and the scale of mass production is generally small.
Among old battery companies, Jinneng’s average mass production efficiency of heterojunction has reached 23.85%, and it is expected to reach 24.2% by the end of the year. According to Yang Liyou, general manager of Jinneng Technology, “Currently, the cost of Jinneng Technology’s heterojunction products is PERC’s. 138%. We are more certain about dropping to 108%. This is just a conservative goal."
Junshi Energy has taken a different approach. It has creatively launched HDT polycrystalline heterojunction bifacial modules at this year's snec exhibition. It is said that its battery conversion efficiency is as high as 23.5%, while the cost is 10% lower than PERC.
Among the new battery companies, Risen Energy is the first among the top ten component shippers to mass-produce heterojunction modules. In the latest semi-annual report, Risen Energy stated that its heterojunction battery has the highest mass production efficiency Has reached 24.2%, the highest module efficiency is as high as 22%, the first batch of 9BB heterojunction half-chip low temperature welding packaging process, the conversion efficiency of half-chip heterojunction modules exceeded 21.90%, the first year attenuation rate did not exceed 2%, 30 years The rate does not exceed 16.5%. In addition, the company also mentioned that it will combine heterojunction and shingle technology. The preliminary work has been completed and the trial production can be fast.
Among the top ten component companies that ship, except for Risen Orient, only Canadian Solar's capacity plan for heterogeneous junctions has already started. It is expected to ship in the first quarter of 2021. Trina Solar disclosed its related heterogeneity in the semi-annual report. The scientific research progress of Jie said that the TUV certification of HJT products will soon be completed, but production capacity planning has not been carried out.
Professional solar cell manufacturers have also entered the game. Tongwei HJT battery research and development production line has been launched at the end of 2018 and officially launched in June 2019. As of the 2019 annual report, the highest conversion efficiency of HJT batteries has exceeded 24.6%, but in the semi-annual report No specific progress regarding HJT technology was disclosed.