LONGi Unveils Hi-MO 7 Module at SNEC, Showcasing Cutting-Edge Solar Technology


On May 24th, the annual SNEC (Shanghai New Energy Industry Association) event commenced in Shanghai, and LONGi, known for its high-efficiency solar modules, made a significant appearance. At the event, LONGi unveiled its latest product, the Hi-MO 7 module, which is based on HPDC (High-Performance and Hybrid Passivated Dual-Junction Cell) technology.


Hi-MO 7 module retains the standard M10 module size and boasts a mass production power output of 580 W, with an impressive conversion efficiency of 22.5%. Designed specifically for large ground power stations worldwide, the Hi-MO 7 module represents a valuable addition to LONGi’s product lineup, contributing to the advancement of the “Terawatt Era” through integrated innovations.

During the release event, Li Shaotang, LONGi’s Product Marketing Director, provided in-depth insights into the core advantages of the HPDC-based Hi-MO 7 module. He highlighted the extensive evaluation, development, and testing that went into its creation. In addition to its high efficiency, the module boasts world-leading product quality and long-term reliability. These features significantly reduce the levelized cost of electricity (LCOE) for large-scale photovoltaic projects in desert regions by maximizing energy generation throughout the module’s lifespan.


The Hi-MO 7 module is the result of advancements in HPDC cell technology and has exceeded expectations in power generation efficiency. It incorporates high and low junctions, optimized film design, and advanced deposition techniques on the backside of the cell, enabling full-area passivation with minimal parasitic absorption.


The front side of the cell features a local low-resistance contact layer that enhances efficiency. Both sides utilize upgraded antireflection and low-recombination films, as well as improved metallization solutions, to deliver superior performance. The upgraded HPDC cell technology improves conversion efficiency, power temperature coefficient, and overall reliability, thereby significantly enhancing power generation.

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LONGi’s Hi-MO 7 modules based on HPDC cell technology have garnered recognition for their outstanding performance. Prototype products won the TÜV Rheinland Energy Yield Simulation AQM Award in 2022, and in a power generation demonstration project conducted in Qionghai, Hainan, the Hi-MO 7 modules achieved a power generation gain of 2.9% compared to other bifacial modules. This highlights their superior temperature coefficient, low-irradiation performance, improved angle of incidence, and overall product stability, making them highly valuable for ground power generation applications.

LONGi places great emphasis on product reliability throughout the lifecycle, and the Hi-MO 7 module is no exception. It incorporates various design optimizations, including high-quality monocrystalline silicon wafers, customized cell paste, an optimized module encapsulation film system, SMBB high-precision interconnection, and high-reliability automatic welding of junction boxes.

The application of digitalized manufacturing, quality control platforms, and intelligent AI detection technology further ensures the product’s quality. Consequently, the Hi-MO 7 module offers a linear power warranty of not more than 0.38%, providing customers with reliable and efficient returns that surpass expectations.

An important aspect of the Hi-MO 7 module is its adherence to the standardized M10 module size of 2278×1134 mm. This large-sized, high-efficiency bifacial module has gained significant market share since its introduction three years ago, accounting for over 70% of the market. The industry-wide standardization achieved through M10 reduces application risks in extreme weather conditions, promotes coordination throughout the industry chain, facilitates the replacement and upgrade of existing solar power plants, and contributes to the healthy and sustainable development of the industry.

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The M10 specification strikes a balance between manufacturing, product reliability, application convenience, and compatibility. Hi-MO 7, based on the M10 specification, is compatible with manual installation processes involving large racks, cables, and inverters. The module’s improved efficiency can increase the installed capacity of a power station by over 4.5% in limited space, reducing balance of system (BOS) costs and lowering the costs associated with AC terminal equipment. This results in reduced operation and maintenance expenses over the power station’s lifespan.

LONGi’s product lineup now features the Hi-MO series, which includes the Hi-MO 5, Hi-MO 6, and Hi-MO 7 modules, catering to various scenarios. The Hi-MO 5 series, known for its mature and reliable power generation performance, remains the main product for the utility market. The Hi-MO 6 series, released last year, is a high-quality product targeting the distributed generation market worldwide, offering both high efficiency and exceptional power generation performance while providing users with an unmatched visual experience. The Hi-MO 7 series is designed for scenarios that demand modules with high ground surface reflectivity, elevated ambient temperatures, and limited land availability.

With the arrival of the “Terawatt Era” and the global focus on carbon reduction, the demand for higher efficiency, greater returns, and increased reliability throughout a product’s life cycle in diversified photovoltaic application scenarios has become more urgent. LONGi, as a specialist in green energy technologies, aims to accelerate the realization of a zero-carbon future through the Hi-MO 7 module and its valuable series of Hi-MO modules, offering full-scenario products and solutions.

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Dennis She, Vice President of LONGi, emphasized that continuous and steady innovation is the key to LONGi’s ability to create higher value in the market. LONGi’s technological innovations, efficiency records, and leadership in the solar industry have contributed to the industry’s high-quality development. LONGi delivered over 100 GW of Hi-MO modules, supporting the transition and upgrade of the global energy structure.

In 2022, LONGi achieved “three consecutive championships” in global module delivery and market share, delivering solar modules capable of generating approximately 46.76 GW of power. For 2023, LONGi aims to deliver 85 GW of cells and modules, including self-use. Mass production of the Hi-MO 7 module is expected to commence in the second half of the year, with a target capacity of over 30 GW by year-end. The Hi-MO series will play a crucial role in accelerating the achievement of a zero-carbon future, contributing to humanity’s pursuit of green energy.

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