The Chinese manufacturer has launched a fire-resistant version of its Hi-MO X10 module for distributed PV applications, with back-contact technology and an efficiency of up to 24.8%. The company says the module adds improved fire safety design to address rooftop PV risks such as hot spots and DC arcing.
Chinese solar panel manufacturer Longi launched a fire-resistant version of its Hi-MO X10 module on March 9 at the 19th China International Solar Utilization Conference and Exhibition (SUCE).
According to the company, the module is based on LONGi’s Hi-MO X10 platform, which uses second-generation hybrid passivated back-contact (HPBC 2.0) cell technology.
The Hi-MO X10 portfolio features a maximum module efficiency of 24.8%, a flow temperature coefficient of -0.26%/C and a 30-year product and power warranty. The series is mainly marketed for distributed PV applications.
The new fire-resistant version is designed to address an issue that has become increasingly prominent in the Chinese rooftop PV segment: module-driven fire risk linked to hotspots and DC arcing.
According to Longi, the product is not only intended to reduce the risk of ignition, but also to slow down or prevent flame spread in the event of an external fire.
The company says the module retains the “three-defense” positioning of the Hi-MO It was previously announced that the Hi-MO
The fire-resistant version uses 108 half-cells, supports a 1,500 V DC system architecture and is offered in a power range from 580 W to 630 W. Longi says the module achieves a maximum conversion efficiency of 24.8%, with an average mass production efficiency of more than 24.5%. The operating temperature range is -40 C to +85 C.
Longi describes the security architecture as a combination of protection at the cell, string and module level. Features include a honeycomb-style current diversion structure intended to limit the formation of hot spots, a reinforced junction box seal and weld design aimed at reducing the risk of arcing, and the use of flame retardant materials in encapsulation and junction box components. The company also says the module includes a heat-resistant front glass designed to withstand prolonged exposure to flames longer than conventional PV glass.
The product has obtained a Class A fire certification from TÜV Rheinland at the full module mass production level. The company says it has also undergone performance and safety verification by China’s National Center of Supervision and Inspection on Solar Photovoltaic Products Quality (CPVT), in addition to international standard testing under IEC 61215 and IEC 61730.
The launch reflects a broader shift in the Chinese distributed PV market, where product differentiation continues to move beyond module efficiency to application-specific design. Manufacturers are focusing more on features such as dust-resistant performance, lightweight construction, shade tolerance and fire-resistant configurations.
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