LONGi’s Hi-MO X10 wins pv magazine Award 2025 for back contact bifacial innovation

LONGi has won the prestigious pv magazine Award 2025 in the “Modules” category with its Hi-MO X10 back contact module. The annual pv magazine Award is a widely recognized international distinction in the photovoltaic industry, decided by an independent expert jury. The jury cited the Hi-MO X10 for its technological innovation, particularly its advanced bifacial performance, and for overcoming long-standing limitations of back contact technology while delivering high efficiency under real-world conditions.

Jury praises optimization that pushes rear-side performance to 75%

Bifacial performance has traditionally been considered a challenge for back contact cell designs as the electrical contacts are located on the rear side of the cell. The pv magazine awards jury highlighted how the Hi-MO X10 addresses this limitation through a series of targeted design optimizations. According to the jury, these measures increased the module’s rear-side performance ratio to 75%, enabling high energy yield from both sides despite the back contact architecture. The jury also commended the module for fully leveraging additional advantages of the technology, including strong shading resilience and exceptional performance in low-light conditions.

HPBC 2.0 technology sets new efficiency benchmarks beyond TOPCon

The award also highlights the technological progress behind LONGi’s HPBC 2.0 platform, which underpins the Hi-MO X10.  Based on second-generation Hybrid Passivated Back Contact cells and the TaiRay wafer, the module achieves a maximum mass production efficiency of 24.8%, exceeding typical performance levels of conventional TOPCon modules. The zero-busbar design not only improves the visual aesthetic but also enhances light absorption by removing grid lines from the front surface. These technological advancements ensure that the Hi-MO X10 generates more power per square meter, making it a superior choice for a wide range of application scenarios, including commercial and industrial installations.  

For residential use, the 54-cell version of the Hi-MO X10 is part of LONGi’s EcoLife Series, which has been developed specifically to address the performance, reliability, and design requirements of modern homeowners.

Real-world performance benefits from improved shading behavior and thermal response

In addition to the bifacial performance highlighted by the jury, the Hi-MO X10 demonstrates advantages under real-world operating conditions. Its so-called soft breakdown behavior reduces hotspot risk under partial shading, a factor that can significantly affect long-term system reliability. Under shading conditions, the design can reduce power losses by more than 70% compared with standard TOPCon products.  

The module also benefits from an improved temperature coefficient of -0.26%/°C, supporting stable energy yield in high-temperature environments. Together, these characteristics underline the relevance of back contact technology not only at cell level, but in practical system operation across different climate and installation scenarios.