- Hi-MO X10 features new proprietary HPBC 2.0 back contact technology
- Availability in DACH region: March 2025
- Targeted production capacity for HPBC 2.0 modules by end 2025: 50 GW
LONGi, a global solar technology leader, launches its next-generation high-end back contact solar module in Germany, Austria and Switzerland - the Hi-MO X10. The module is based on LONGi’s new HPBC 2.0 technology and is equipped with the company’s new proprietary n-type TaiRay wafer and Bipolar Hybrid Passivation Technology which brings significant improvements in efficiency, mechanical characteristics and reliability. In addition, it comes with 0BB-structure (zero-busbar), a multi-layer design for increased performance, as well as a shading optimizer technology that reduces the loss of power output by 70% compared to TOPcon modules. All in all, the Hi-MO X10 sets a performance benchmark with a 670W power output, 24.8% module efficiency, and 26.6% cell efficiency. It outperforms conventional TOPCon modules by 30W. LONGi aims to achieve approximately 50GW production capacity for HPBC 2.0 modules by the end of 2025.
In DACH region the module will be available as dual-glass and glass-foil versions in the sizes of 54 cells with 490W and 72 cells with 670W from March 2025. It can be ordered as of now. All modules offer a power warranty of 30 years. The Hi-MO X10 will be presented today to invited guests in LONGi’s European headquarters in Frankfurt am Main, Germany.
Sales already started: Energy3000 buys 100 MW
Energy3000, an internationally operating full-service provider for photovoltaic products and solutions based in Austria, is one of the first buyers of the Hi-MO X10. Michael Bairhuber, Vice President at Energy3000, signed a 100MW supply agreement at LONGi’s global headquarters in Xi’an, China.
Gerald Müller, Sales Director DACH at LONGi Solar DG: “The Hi-MO X10 is the ideal solution for the DACH region, where efficiency, durability, and reliability are key. With HPBC-2.0 back-contact technology on the N-type TaiRay wafer and a module power of up to 670 W, the Hi-MO X10 sets new standards in performance. In Germany, where solar systems are predominantly installed on rooftops, the shading optimizer technology reduces power loss by over 70%, ensuring consistent energy production even in partially shaded conditions. As a result, the module’s low-light performance is significantly better than that of TOPCon modules. In Austria and Switzerland, where demanding alpine weather conditions require robust systems, the low-temperature coefficient of -0.26%/°C ensures optimal performance in both hot summers and cold winters. Additionally, the zero-busbar design enhances both aesthetics and efficiency. LONGi is proud to bring cutting-edge solar technology to the DACH market with the Hi-MO X10 to meet the high-performance demands. The module is particularly cost-effective due to its excellent low-light performance compared to TOPCon modules. This means it generates more electricity during dawn and dusk.”
Hi-MO X10 - Engineered to maximize reliability, cost-effectiveness, and long-lasting power output
With just 1% degradation in the first year and a 0.35% annual linear degradation rate, the module offers unmatched longevity. In addition, its power temperature coefficient of -0.26%/°C delivers a 0.03% improvement over TOPCon modules, ensuring superior performance especially in hot climates.
HPBC 2.0 enhances solar module efficiency and reliability through a multi-layer structure designed for optimal performance:
- Light absorption layer: Featuring a multi-layer anti-reflection film, this layer improves short-circuit current by 2.25%. The additionally improved uniformity of the micro texture reduces the reflection of short-wave light by 12%. Therefore, more sunlight is effectively captured.
- Photovoltaic conversion layer: Leveraging Bipolar Hybrid Passivation Technology, this layer increases open-circuit voltage by 15mV to 745mV.
- Uniform passivation: The implemented uniform passivation significantly reduces UV-induced degradation and boosts long-term efficiency.
- Electric transmission layer: With the Bipolar Low Resistance Passivation Contacts and the inclusion of the shading optimizer technology, this layer reduces shading power losses by over 70% and lowers hotspot temperatures by 28%, ensuring enhanced safety and performance. Additionally, the special 0BB structure adds more module power output and reliability.
The zero-busbar structure significantly changes cell design and performance
The back contact manufacturing process has been upgraded through the implementation of a zero busbar (0BB) structure utilizing an intelligent soldering process to make the connections stronger than with conventional soldering. By directly connecting the ribbons to the fingers the energy transmission distance is reduced by 6.5%, adding an extra 5W to the module’s power output. This changed back contact structure also removes the shading of the busbars, enhancing aesthetics as well as its performance. Precision laser etching and advanced high transparency insulating materials further enhance performance by reducing leakage risks and improving light absorption.
LONGi’s TaiRay wafer drives a higher reliability and performance directly at the core of the modules
LONGi’s proprietary TaiRay wafer solves the long-standing challenges of silicon wafer limitations. With improved resistance distribution, fewer impurities, and a remarkable 16% increase in break resistance, this wafer is a key driver of the Hi-MO X10’s high performance. The performance increase and related benefits are the result of an improved Recharge Czochralski (RCz) process (crystal pulling method) used in the production of monocrystalline silicon ingots.
HPBC 2.0 is the start of a new era in back contact technology
LONGi’s HPBC 2.0 technology represents a leap in back contact solar modules, overcoming previous limitations in back contact (BC) cell designs and silicon wafer constraints. One of the major advancements by LONGi’s R&D between HPBC 1.0 and 2.0 is the 1% cell efficiency increase within only 2 years of development from 2022 to 2024. Another big step was LONGi’s change from P-Type to N-Type wafers.
LONGi's commitment to research and development to further improve its back contact technology continues unabated, resulting in several records in 2024. The latest record from October 2024 is especially significant because LONGi is the first Chinese solar technology company which has set the module efficiency world record since its recordings in 1988. With 25.4% LONGi is now leading the global module efficiency record list. The National Renewable Energy Laboratory (NREL) has updated its Champion Photovoltaic Module Efficiency Chart accordingly: https://www.nrel.gov/pv/module-efficiency.html
In May 2024, LONGi made history when its heterojunction back contact (HBC) solar cell achieved a new world record for photovoltaic conversion efficiency at 27.3%, certified by the Institute for Solar Energy Research Hamelin (ISFH).
The Hi-MO X10 will be available as dual-glass and glass-foil versions in the sizes of 54 cells with 490W and 72 cells with 670W from March 2025.
Links:
Website (English): https://www.longi.com/eu/products/modules-series/hi-mo-x10/
Datasheets (German): Download Datasheets Hi-MO X10
Leaflet (English): https://static.longi.com/Hi_MO_X10_Leaflet_a3840f66e5.pdf