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LONGi has launched its Hi-MO X12 solar module series in Europe. The series uses what the company describes as the industry’s first Integrated Conductive Interconnection (ICI) technology, replacing conventional soldered ribbons with a continuous sheet of conductive metal foil. Commercial and industrial versions reach up to 690 W and a maximum module efficiency of 25.72 percent, with deliveries to Europe expected to begin in January 2027.
Metal foil instead of solder ribbons
Conventional modules connect cells with soldered metal ribbons, which add electrical resistance and can put mechanical stress on the cells because of differences in thermal expansion. In Hi-MO X12 the ribbons are replaced by a continuous conductive foil extending over 400 metres per module. The foil connects directly to the cells and eliminates more than 15,000 potential solder-joint failure points per module.
According to LONGi, the new interconnection increases the conductive cross-sectional area by 85 percent, and the lower resistance adds 6-8 W of module power. The ribbon-free structure also cuts internal mechanical stress from 50 MPa to 20 MPa, a reduction of 60 percent, lowering the risk of microcracks during transport and installation.
Gapless cell layout and moisture barrier
ICI also includes a gapless cell architecture that uses overlapping cells and hidden busbars to remove visible gaps between cells. The larger active area contributes up to 12 W, and together the two innovations raise module power by up to 20 W. The metal foil barrier reduces the water vapour transmission rate (WVTR) by 90 percent, helping protect internal components against moisture-related degradation, particularly in humid climates.
Hi-MO X12 carries a 30-year power performance warranty guaranteeing at least 88.85 percent of rated power after 30 years, with maximum degradation of 1 percent in the first year and 0.35 percent annually thereafter.
Six versions for commercial and industrial rooftops
The European portfolio comprises six module versions in 54-, 60- and 72-cell configurations for commercial and industrial projects, giving installers flexibility to match different roof dimensions. Two EcoLife residential versions offer up to 500 W and a uniform black surface with virtually no visible gaps between cells, in single-glass and dual-glass configurations.
The series builds on LONGi’s HPBC 2.0 (Hybrid Passivated Back Contact) cell technology already used in the Hi-MO X10 and EcoLife product families. The company notes that the specifications and performance figures reflect pre-production status and will be confirmed ahead of commercial release.
We previously reported on the technologies LONGi presented in Shanghai in July 2026.
Sources
- LONGi Solar press release, “LONGi launches Hi-MO X12 in Europe with new Integrated Conductive Interconnection (ICI) technology and up to 25.72% module efficiency”, 13.11.2026 (LONGi Solar European communications)
Image: LONGi
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