Zheng Quan Zhi Xing·2025-07-08 07:19Core Viewpoint - The BC battery sector has seen a collective surge of over 4% as of July 8, with several stocks, including Tongwei Co., Ltd. and Junda Co., Ltd., reaching their daily limit up [1] Industry Summary - BC batteries, or back-contact batteries, integrate both positive and negative metal contacts on the back, allowing for a design that absorbs more sunlight and offers higher efficiency, particularly suitable for distributed photovoltaic and commercial rooftop applications [1] - By April 2025, the mass production efficiency of BC batteries is expected to exceed 27%, with a theoretical efficiency limit of 29.1% [1] - Recent discussions in the photovoltaic industry have focused on "anti-involution," with the Ministry of Industry and Information Technology emphasizing the need for lawful and orderly competition, which is expected to enhance market expectations for the healthy development of the photovoltaic industry [1] - The BC battery technology is positioned as a high-efficiency, high-value photovoltaic technology, offering better performance compared to traditional P-type and TOPCon batteries, and is anticipated to play a significant role in the industry's transformation and upgrade [1] Company Summary - Longi Green Energy (601012) has a BC production capacity of 30GW HPBC (High-efficiency Passivated Back Contact) battery project, which is already in mass production [2] - Junda Co., Ltd. has established an experimental line for BC products based on N-type technology, moving towards pilot testing and mass production of N-type products [2] - Tongwei Co., Ltd. has a comprehensive layout in various technology routes, including TOPCon, HJT, BC batteries, and perovskite/silicon tandem batteries, with ongoing breakthroughs in N-type batteries [2] - Dongcai Technology (601208) focuses on technological innovation and explores differentiated photovoltaic product development strategies, with products already applied to BC batteries [2] - Jiejia Weichuang (300724) is developing XBC battery testing and sorting equipment to address issues related to the positioning accuracy of battery grid lines on the back [3] - Foster (603806) is the largest supplier of packaging materials for Longi and Aiko's BC batteries [4] - Aiko Co., Ltd. (600732) has launched a new generation of N-type back-contact ABC battery technology components and photovoltaic energy solutions [4] - TCL Zhonghuan (002129) is enhancing its product lineup by transforming TOPCon standard component production lines and establishing a 2GW BC component production line [4]