IPP&T Magazine Online

Seamless soldering has potential to push solar efficiencies to new heights

June 4, 2019  

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LONGi Solar has announced that the company has developed the technology of “Seamless Soldering,” which completely eliminates the gap between cells and increases the efficiency of PV modules.

According to a recent TÜV SÜD test on May 30, “Seamless Soldering” technology – when combined with innovative module design – has the potential to push LONGi Solar’s high efficiency PERC module power record to 500Wp.

The technology is planned for mass production in the second half of this year.

“Seamless Soldering” technology uses a solder ribbon to achieve “tiled” interconnection of the cell, completely eliminating the typical 2mm wide cell gap, thus increasing efficiency while reducing the BOM cost of the module. This technology is perfectly compatible with existing module encapsulation processes and equipment. It has high mass production maturity and stability, and capacity is easily scalable.


In addition, “Seamless Soldering” has good technical compatibility that integrates with M6 monocrystalline silicon wafer, thin silicon wafer, soldering wire and reflective ribbon.

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