LONGi’s Hi-MO X10 Earns TÜV Rheinland’s Top Rating for Shading Resistance
LONGi’s Hi-MO X10 Receives TÜV Rheinland Class A Certification for Shading Resistance, Redefining PV Module Reliability
In a major breakthrough for photovoltaic technology, LONGi's Hi-MO X10 series has earned the prestigious Class A Shading Resistance Certification from TÜV Rheinland, a globally recognized third-party certification authority. This milestone not only highlights LONGi’s ongoing leadership in high-efficiency solar products, but also marks a significant step forward in addressing one of the industry's most persistent challenges—power loss due to shading.
■ Tackling Real-World Shading Challenges
Shading caused by trees, buildings, power lines, or rooftop obstructions has long plagued solar module performance. Even partial shading can lead to dramatic drops in output, create localized hotspots, accelerate material degradation, and ultimately reduce the system's lifespan and safety.
To solve this, the Hi-MO X10 series adopts LONGi’s revolutionary HPBC 2.0 cell architecture and a unique quasi-bypass diode structure. This innovation enables current to automatically reroute around shaded cells, minimizing the impact on overall power output. In rigorous laboratory simulations, the Hi-MO X10 demonstrated over 70% lower power loss under identical shading conditions compared to conventional TOPCon modules.
■ Advanced Cell Efficiency and Long-Term Reliability
The Hi-MO X10 is not only optimized for shading scenarios—it is also a high-efficiency champion. The mass-produced HPBC 2.0 cells exceed 26.6% efficiency, with module efficiencies reaching up to 24.8%, placing it among the top-performing modules globally.
To ensure long-term stability and performance, the module integrates a host of proprietary technologies:
Advanced half-cell layout to reduce resistive loss
Dual-sided composite passivation for enhanced light utilization and reduced leakage
Flat intelligent soldering process to lower thermal stress and microcracks
Fine-line pure silver busbars to boost conductivity while reducing material consumption
These innovations jointly ensure lower degradation, improved energy yield, and stable operation throughout a 30-year lifecycle, delivering more value and confidence to investors and end-users alike.
■ Recognized by Industry Authorities
The TÜV Rheinland certification, widely considered one of the most rigorous in the PV industry, confirms that the Hi-MO X10 meets the highest standards for shading tolerance and safety. The test results validate LONGi’s approach to real-world PV challenges and reinforce its commitment to quality, reliability, and innovation.
■ LONGi’s Vision for the Future
With this recognition, LONGi once again proves its technological strength and industry foresight. As global PV deployment shifts from ideal open-field installations to more complex urban, industrial, and distributed rooftop settings, modules like the Hi-MO X10—with superior adaptability to shading and harsh conditions—will become increasingly critical.
LONGi will continue to invest in next-generation solar technologies, providing the global market with high-performance, high-reliability green energy solutions, and accelerating the transition to a carbon-free energy future.
