Wedoany.com Report-May 10, Chinese solar module manufacturer Longi introduced its innovative bifacial n-type heterojunction (HJT) back-contact solar module, the Hi-MO S10, at the Smarter-E trade show in Munich, Germany. This launch marks a significant advancement in photovoltaic technology, emphasizing efficiency and durability.

Longi stated: “This is the first time that heterojunction back contact technology has been successfully implemented in a commercialized module. The Hi-MO S10 delivers a world-leading cell efficiency of 27.6% and a module efficiency of up to 25.2%, setting a new benchmark for performance in the photovoltaic industry.”

The Hi-MO S10, a 54-cell module, offers a power output of 490 W to 510 W and a power density of 240.1 W/m² to 249.9 W/m². Available in five versions, it achieves power conversion efficiencies between 24.0% and 25.0%, with a temperature coefficient of -0.24%/C. The module measures 1,800 mm × 1,134 mm × 30 mm, weighs 23.5 kg, and features a black anodized aluminum alloy frame with semi-tempered glass of 2.0 mm and 1.6 mm thickness.

Designed for longevity, the Hi-MO S10 comes with a 30-year linear power output warranty, ensuring at least 88.85% of nominal output after 30 years. It has a first-year degradation rate of 1% and an annual linear degradation of 0.35%. Longi noted: “Designed for durability it has a load capacity of 6000/3600 Pa. As a result, the module can withstand very high snow loads, equivalent to 4 m of snow pressure, as well as heavy storms, equivalent to a category 15 hurricane. Its Class A fire rating guarantees the highest safety standards.”

The module incorporates 182 mm n-type TaiRay wafers, which enhance resistance consistency, reduce metal impurities, and improve mechanical strength. Longi explained: “The full-back contact one-line welding structure reduces cell edge stress, improving the module’s anti-cracking performance. Furthermore, the wafer is 10 μm thicker than mainstream options, providing enhanced reliability and longevity.” The module’s bipolar passivation technology on the rear side lowers hotspot temperatures by 38.75% compared to conventional TOPCon cells, reducing thermal risks.

The Hi-MO S10’s advanced design and high efficiency position it as a leading solution for sustainable energy, offering robust performance for diverse applications while prioritizing safety and reliability.