On April 27, Longi Green Energy participated in the official release of the “Back Contact (BC) Battery Technology Development White Paper” in Beijing. This document is the first authoritative report on BC technology aimed at the photovoltaic industry and the general public. It systematically outlines the industrialization pathway, core advantages, and sustainable development potential of BC technology, marking the beginning of a new phase for this technology, which is renowned as the “ultimate form of monocrystalline silicon solar cells.”
The release event highlighted that the breakthrough in BC technology is a critical sign of China’s transition from “follower” to “leader” in the photovoltaic industry, showcasing the country’s core competitiveness in the global new energy technology sector. BC technology is set to accelerate the evolution of the photovoltaic industry towards higher efficiency and lower costs, injecting new momentum into the global energy transition.
During the conference, industry experts provided in-depth analyses from various perspectives, including empirical data, energy transformation, the iterative process of photovoltaic technology, testing and measurement, and international certification. There was a unanimous agreement that BC technology has achieved dual breakthroughs in optical and electrical performance by eliminating traditional battery grid line shading and enhancing light absorption area, all while ensuring reliability, stability, and innovation.
Professor Martin Green from the University of New South Wales, known as the “father of solar energy,” sent a video message congratulating the initiative and predicted that IBC technology would gradually replace TOPCon technology within the next five years. He also praised Chinese enterprises for their industrialization efforts in the BC field.
In the roundtable discussion, industry leaders from associations, research institutions, power generation groups, certification agencies, and leading companies engaged in deep discussions about the significance of the BC technology white paper release, the core challenges of industrialization, and strategies to address these challenges. Experts concurred that BC technology has overcome critical bottlenecks in industrialization, and its technological maturity and market competitiveness will propel the photovoltaic industry into a new cycle of technological iteration, becoming a core driving force for the global energy transition.
In recent years, significant technological breakthroughs, such as laser patterning and wet processing optimization, have substantially reduced the production costs of BC battery modules and significantly enhanced mass production efficiency, rapidly improving product competitiveness and providing a solid technical and market foundation for large-scale manufacturing.
The publication of this white paper, supported by authoritative data and technical analysis, serves as a scientific guide for the industrialization of the BC technology. As the “crown jewel” of crystalline silicon technology, BC technology is poised to lead the global photovoltaic industry into a new era characterized by higher efficiency and lower electricity costs, contributing Chinese wisdom to the global energy transition.
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