The evolution of photovoltaic (PV) interconnection technology has witnessed significant milestones—from 4BB and 5BB to MBB (Multi-Busbar, 9–15 lines), then to SMBB (Super-Multiple Busbar, 16+ lines), and now to ZBB (Zero Busbar). This continuous iteration underscores the industry’s relentless pursuit of higher quality and efficiency. As such, the research, development, and industrial-scale application of ZBB technology align perfectly with the prevailing direction of PV innovation.
What Is ZBB Technology?
In a PV module, busbars serve two primary functions: collecting current from the fingers and enabling series connections between cells. With each technological advance, busbars have become finer and more numerous, reducing shading and current losses.
ZBB technology represents a breakthrough in this area by:
Eliminating traditional busbars,
Utilizing finer and more numerous ribbons,
Reducing shading and current losses,
Enhancing current collection capacity,
Optimizing ribbon and adhesive film design.
These improvements contribute to both higher cell efficiency and a lower Levelized Cost of Energy (LCOE), meeting the dual goals of performance enhancement and economic return improvement.
Astronergy’s Leadership in ZBB-TOPCon Technology
Astronergy is an industry pioneer in integrating ZBB with TOPCon cell technology and scaling it to mass production. The ZBB-TOPCon platform developed by Astronergy is:
Mature and versatile, compatible with various n-type technologies (e.g., HJT, BC),
Production-ready, enabling the launch of a complete ZBB-TOPCon product lineup,
Application-flexible, catering to residential, commercial & industrial (C&I), and utility-scale projects.
These products stand out for their:
High efficiency and refined appearance,
Reliability and safety in long-term deployment,
Environmentally friendly attributes, supporting low-carbon goals.
By focusing on these three pillars, Astronergy continues to create greater customer value across diverse PV scenarios.
Capacity and Scale: Enabling Reliable Delivery
Astronergy’s robust production capabilities form the backbone of its technology leadership. Key milestones include:
2023: 1 GW+ ZBB-TOPCon capacity achieved at the Haining Manufacturing Base, Zhejiang Province.
2024: An additional 5 GW capacity added at the Fuyang Manufacturing Base, Zhejiang Province.
2024 target: Total ZBB-TOPCon capacity surpassing 6 GW.
This positions Astronergy among the industry’s frontrunners in both technology and supply capability.