#China #LONGi #Beijing #Solar Technology #Back Contact

BC Technology Unveils Future of Solar Industry

On April 27, 2025, a momentous occasion unfolded in Beijing with the release of a pioneering white paper on Back Contact (BC) solar technology, spearheaded by prominent organizations including the China Electricity Council, TÜV Rheinland, China General Certification Center (CGC), AIKO, and LONGi. This landmark document marks the first authoritative report on BC technology within the photovoltaic industry, delineating its industrialization trajectory, core advantages, and sustainable growth potential. It signifies a pivotal step forward as BC technology is recognized as the ultimate form of single-junction silicon solar cells poised for mass application.

The white paper's release was celebrated during an event that showcased the gathering of industry experts, academics, and stakeholders who extended commendations and insights on the technology's prospective impacts. Notably, Professor Martin Green from the University of New South Wales, esteemed as the 'Father of Photovoltaics,' acknowledged the advancements in BC technology. He projected that Interdigitated Back Contact (IBC) technology will gradually overtake TOPCon technology in the next five years, citing the promising innovations emanating from Chinese firms.

Mr. Jinhua Wu, Executive President of the Solar Power Branch of the China Electricity Council, articulated that the ascendency of BC technology heralds a new era for the photovoltaic sector—one characterized by enhanced efficiency and reduced costs. He emphasized the necessity for a cohesive effort across the entire industry to fully realize BC technology's commercial viability. Complementing this sentiment, Mr. Xiaochao Zhang, former Deputy Director of the New Energy Division at China Huaneng Group, expressed confidence in BC products, noting their high efficacy and reliability as key value propositions for end-users.

Validation Through Expert Perspectives

The event also featured elaborations from professionals concerning the global relevance of BC technology. Dr. Qi Gao, Technical Director of Solar Services at TÜV Rheinland, discussed the reliability standards and testing protocols applicable to BC technology from an international certification perspective. Furthermore, empirical evidence was presented by Mr. Gang Zhou, General Manager of the Solar Energy Division at CGC, illustrating the superior performance of BC modules in demonstration projects.

BC Technology: A Benchmark of Efficiency

With BC cells achieving an unprecedented efficiency record of 27.81% this year—certified by ISFH—these cells have redefined standards in solar technology. The innovative design, which integrates both electrodes on the cell's back surface, minimizes shading caused by front-side busbars, thereby maximizing light absorption. This substantial enhancement in conversion efficiency strengthens BC technology's status as the pinnacle of single-junction silicon solar cell innovation.

In a subsequent panel discussion, industry thought leaders including Mr. Zhenguo Li, President of LONGi, and Prof. Wenzhong Shen, Director of the Solar Energy Research Institute at Shanghai Jiao Tong University, provided insights on the white paper's implications, BC technology's core advancements, and future challenges. There emerged a clear consensus: BC technology is not only mature but is also set to catalyze further turmoil and growth within the solar industry.

A Blueprint for Future Adoption

The white paper is structured within seven chapters that encompass a detailed examination of BC technology principles, its road to industrialization, standardization mechanisms, core advantages such as efficiency and reliability, application insights across various scenarios, and future ecosystem developments. It is hailed as the 'crown jewel' of photovoltaic technologies, catalyzing a global shift toward higher efficiency and lower levelized costs of electricity (LCOE), while propelling the transition to sustainable energy solutions.

As this innovative technology progresses, its full potential appears boundless, promising to lead the solar industry not just into a new era of possibilities but also into a framework of sustainable energy practices for a greener future.