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At its PV and Energy Storage Innovation Technology Launch in Shanghai on 14 July 2026, LONGi unveiled eight new photovoltaic technologies covering cells, modules, hardware and energy management. According to the company, when the eight technologies are combined in a standard module, module power rises above 690 W at 25.54 percent efficiency.
The figure was given for a standard 2,382 x 1,134 mm module. Presented together as the “Technology Forest”, the technologies can also be used on their own, and different combinations can create products tailored to customer scenarios. LONGi Chairman Zhong Baoshen argued that the industry can escape destructive price competition only through technological innovation.
Cell side with ACM finger technology
Developed in-house, ACM (Advanced Contact Matrix) uses a patented nano-alloy and an anti-oxidation surface treatment to halve the electrical resistance of the fingers compared with conventional TOPCon products. Adding 0.2 to 0.3 points to mass-production efficiency in Hi-MO 9 and Hi-MO X10 modules, the technology supports module power of up to 672 W.
Module side with a ribbon-free backsheet and new interconnections
Conductive Backsheet technology removes the solder ribbons used in modules for around 20 years; the rear encapsulation film and conductive ribbon are merged with the backsheet into a single part. According to LONGi, the full-surface metal foil contact widens the current-carrying cross-section by more than 85 percent, cuts mechanical stress on the cell by 60 percent and water vapour transmission by 90 percent, and its reflective foil adds 3 to 5 W per module.
Shingled technology, which overlaps cells by 0.4 mm at the edges, increases the effective generating area by around 2 percent, while Hidden Busbar technology, which moves the busbars to the back of the module, increases the light-receiving area by 1.1 percent. A low-temperature interconnection called STAC reduces thermal stress in BC cells, improving resistance to outdoor temperature changes.
Smart modules, dust-resistant Hi-MO X10 Pro and LONGi One OS
Smart Modules, which place a separate MPPT unit on each module, increase output by 5 to 30 percent in systems with partial shading, and their rapid shutdown function brings DC voltage below 30 V within 20 seconds. Certified by TÜV SÜD in 2025, the product’s global launch is on 25 August 2026 in Brazil, with volume deliveries starting in October. Hi-MO X10 Pro modules combine ACM with an anti-dust coating and a redesigned frame to reach 24.7 percent efficiency and 670 W.
The LONGi One OS platform, which manages solar, storage, EV charging and load management together, recalculates the charge-discharge plan every 15 minutes using market prices, generation and consumption forecasts and weather data.
BC target of more than 100 GW shipped by end-2026
LONGi, which went all-in on back contact (BC) cell technology in 2023, held 510 BC patents at the end of 2025, 330 of them invention patents. The company aims to raise global BC module shipments above 100 GW by the end of 2026.
Sources
- LONGi press release, “LONGi introduces eight new solar technologies”, 17.07.2026 (LONGi Solar Europe press office)
Image: LONGi
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