Anhui Huasun Energy Co., Ltd.
Anhui Huasun Energy Co., Ltd.

Huasun Unveils 0BB Heterojunction Module with Cutting-edge Zero Busbar Technology


As the n-type technology landscape undergoes a significant transformation within solar the industry, heterojunction (HJT) technology stands out by showcasing remarkable advancements in the last couple of years. Recent data projections indicate that over 60GW of HJT production capacity will be operational by 2024. With improved efficiency, consistent power generation performance, and heightened reliability, HJT modules are increasingly catching the attention of Chinese state-owned enterprises, international investors, and project developers, fueling anticipation for a surge in global demand for HJT modules.


In this dynamic environment, Huasun has unveiled its latest innovation in high-efficiency modules, featuring groundbreaking zero busbar (0BB) technology. Launched on April 18, 2024, this cutting-edge advancement has been seamlessly integrated into Huasun's mass production lines, including the Himalaya G12 series and Everest G12R rectangular series of large-format modules. Leveraging innovative improvements in printing process, welding before lamination, fine ribbons, ultra-thin silicon wafers, encapsulation, and sealing technologies, Huasun has significantly elevated the electrical, optical, and temperature coefficient performance of HJT modules, enhancing the market competitiveness of its product lineup.

As a frontrunner in HJT mass production, Huasun continues to lead the photovoltaic (PV) industry by harnessing the latest 0BB technology. This breakthrough enables higher conversion efficiency, enhanced reliability, and lower Levelized Cost of Electricity (LCOE) for PV projects, further solidifying Huasun's position as an innovator in HJT technology R&D and industralization.

While 0BB technology is advancing towards industrialization, variations exist among companies regarding specific implementation methods. Huasun's approach primarily involves welding and dispensing, incorporating advantages such as stronger adhesion, improved resistance to hot spots, and elimination of load-bearing film.

Specifically, regarding the manufacturing process of 0BB cells, Huasun adopts a simpler two-step single printing (SP) technology to deliver superior product quality and enhanced electrical and cell-to-module (CTM) performance, demonstrating significant advantages over super multi-busbar (SMBB) products in terms of OCV, conversion efficiency and module power output.


“Huasun's 0BB modules employ welding before lamination, which offers benefits including reliable soldering, reduced contact resistance, enhanced resistance to hot spots, lower hot-spot temperature, and higher module reliability. Additionally, the design reduces metal shadowing area on the rear side, expanding the light-receiving area and achieving bifaciality of up to 90%,” emphasized by Christian Comes, Huasun’s BD Director Europe.

The 0BB technology supports the trend towards thinner silicon wafers by providing higher reliability with no main grid, thinner ribbons, minimal stress, and lower fragmentation rates.

By leveraging the downshifting (DS) light conversion encapsulation and PIB edge sealing technology, Huasun's HJT 0BB modules deliver a substantial increase in power generation capacity. This advancement translates into more dependable products for owners of photovoltaic projects across utility, commercial & industrial (C&I), and residential rooftops.


The successful mass production of "G12+0BB" and "G12+R+0BB" HJT products signifies another milestone for Huasun in its quest for efficiency and power enhancement. Committed to advancing the industrialization of HJT technology, Huasun continues to promote the widespread adoption of 0BB high-efficiency modules, contributing to the global development of clean energy.