LONGi has unveiled its lightweight BC module under the Hi-MO X10 series for low-load-bearing C&I roof-based PV installations
Weighing 16.3 kg, it can deliver a power output of up to 560 W and an efficiency of up to 24.8%
It can also reduce installation cost and turnaround time compared to standard alternatives, by eliminating the need for roof reinforcement of old C&I roofs
LONGi expanded its Hi-MO X10 series portfolio with the launch of the Guardian Light Design module. According to the company, this module has been developed targeting low-load-bearing commercial and Industrial (C&I) roofs.
This new module, under the LR7-60HVHL model, featuring 120 HPBC 2.0 half cells, boasts a power output of up to 560 W and an efficiency of up to 24.8%, claimed the company. The company calls its proprietary BC cell structure HPBC, which stands for Hybrid Passivated Back Contact, while the 2.0 indicates 2nd generation. Measuring 1,990 × 1,134 × 30 mm, it is laminated with 1.6 mm semi-tempered front glass and a rear backsheet. Weighing 16.3 kg, it has weight per unit area (density) of 7.2 kg/m². The company emphasized that this is up to 42% lighter compared to a standard double-glass-based TOPCon module.
According to the company, the 10 types of lightweight or flexible PV modules available in the global market are mostly based on p-type PERC or n-type TOPCon cell technology. These have an average efficiency level of about 21%, reported LONGi.
In contrast, the company says the Hi-MO X10 lightweight module offers a maximum efficiency of 24.8%.
Explaining the limitations of old C&I factory roof-based PV installations, LONGi stated that these require reinforcement of rooftops. The cost of reinforcing the ‘main structure + purlins’ of a Chinese building comes up to 0.5 RMB/W, or RMB 500,000 for a 10,000 m² rooftop, explained LONGi. In addition to the cost, the whole process of reinforcement and PV installations takes 42 days. However, the lightweight modules, which don’t need reinforcements, take only between 8 and 10 days for the installation.
Alongside the performance and easy installations, this module exhibits multiple reliability and safety features. Relative to market available lightweight modules, its frame structure design incorporates 2 additional aluminum cross bars, each 20 mm in diameter, placed at 660 mm intervals along the length of the module. This design increases the maximum load-bearing capacity by more than 50%, while it reduces the potential risk of deformation at the center by 50%, without cell microcracks, claimed LONGi. The module can endure front and rear side static mechanical loading of up to 3,600 Pa and 2,400 Pa, respectively.
Prior to this global launch, this module was introduced in May 2025, targeting the Chinese market.
President of LONGi's Distributed Business Group Jiang Dongyu said, “LONGi has always adhered to the development philosophy of stability, reliability, and technological leadership even when facing the trend of ‘cost reduction’ in the solar industry.” He added, “When the demand for cost reduction conflicts with the ‘reliability’ of products, LONGi will firmly prioritize reliability."