210×210mm 12BB Monocrystalline Silicon Solar Cell – High-Efficiency Core Component for Large-Format PV Modules

1. Large-Format Design for Higher Module Power

The square 210×210mm large-format design significantly increases the cell area compared to conventional M6 (166mm) and M10 (182mm) formats. A larger light-receiving area translates into higher power output per cell, enabling higher total module power within the same panel dimensions. This helps reduce balance of system (BOS) costs and enhances overall economic returns for solar power plants.

2. 12-Busbar Technology for Reduced Power Loss

The 12-busbar (12BB) design features five 0.5mm-wide busbars on the front side with a spacing of 17.45mm. Compared to conventional designs with fewer busbars, the 12BB structure shortens current transmission paths, reduces series resistance, and minimizes internal power loss. Additionally, the multi-busbar design improves resistance to micro-cracks, enhancing the long-term mechanical reliability of the final module.

3. Bifacial Structure for Increased Energy Yield

The cell adopts a bifacial design, with the front side capturing direct sunlight while the rear side absorbs reflected and diffused light from the ground or surrounding surfaces. In scenarios such as sandy terrain, snowy environments, or high-reflectivity rooftops, bifacial modules can achieve an additional 5% to 25% energy gain, significantly improving project return on investment.

4. High-Efficiency PERC Process for Stable Performance

The front surface undergoes alkaline texturization to form a pyramid-like texture, effectively reducing reflectivity and enhancing light absorption. A dark blue silicon nitride anti-reflective (AR) coating further improves light transmission. The rear side features a local aluminum back surface field (Al-BSF) design, optimizing carrier collection efficiency and ensuring stable electrical performance over the cell's lifetime.

5. Strict Process Control for Quality Assurance

Wafer thickness is maintained within 180μm ± 20μm, balancing mechanical strength and material cost. Each cell undergoes rigorous electrical performance testing and visual inspection, ensuring conversion efficiency between 22.1% and 23.1%, with output power ranging from 9.75W to 10.18W. Cells are packaged in standard cartons with foam protection, with 600 pieces per carton, ensuring safety and integrity during transportation.

Application Value

This 210×210mm 12BB monocrystalline silicon solar cell is ideal for high-efficiency PV module manufacturing and is widely applicable in utility-scale solar farms, commercial and industrial rooftop installations, and residential solar systems. Its three core advantages—large format, high efficiency, and bifacial design—enable module manufacturers to achieve higher power output within the same module area, reduce levelized cost of electricity (LCOE), and deliver better returns for end customers.

The product also supports OEM customization, allowing adjustments in branding, packaging, and technical specifications to meet diverse market and application requirements.

Conclusion

As a critical component in the PV supply chain, the solar cell’s technical performance directly determines module efficiency and reliability. The 210×210mm 12BB monocrystalline silicon solar cell, with its advanced 12-busbar architecture and bifacial design, strikes an excellent balance between high efficiency, reliability, and cost-effectiveness, serving as a key enabler for next-generation high-power, low-cost PV modules.

Shenzhen Shi Haoxiang Solar Battery Co., Ltd.