LONGi Shatters Tandem Cell Efficiency Record with 35.5% Milestone, Unveils Revolutionary Technology Forest Portfolio

In a groundbreaking achievement, LONGi has officially announced a new world record for tandem cell efficiency, reaching an unprecedented 35.5% conversion efficiency with its in-house-developed crystalline silicon-perovskite tandem solar cells. This milestone was independently verified by the European Solar Test Installation and unveiled at the Solar and Energy Storage Innovation Conference held at Shanghai Jiao Tong University on July 14, 2026.

Simultaneously, LONGi has launched its innovative Technology Forest system, a comprehensive portfolio that showcases a full range of upgraded PV and energy storage technologies. At the heart of this system lies the flagship Alloy Contact Matrix and integrated conductive backsheet technologies, designed to enhance cell efficiency, module reliability, and system intelligence.

The Technology Forest system incorporates several cutting-edge technologies, including shingling technology that enables precise 0.4mm overlapping of solar cell edges. This converts conventional 2-3mm inactive gaps into power-generating areas, increasing effective module power output by 2%. When combined with 40µm ultra-thin metal foil materials and low-temperature interconnection processes, the integrated conductive backsheet resolves stress concentration and cell fragmentation issues inherent in traditional shingling manufacturing.

Focusing on enhanced performance and reliability, LONGi has also introduced hidden busbar technology, eliminating the need for exposed busbar structures on the front side. This reduces shading loss and increases the effective light-receiving area of modules by 1.1%. Furthermore, the use of 40μm ultra-thin metal foils instead of traditional thick solder ribbons over 250μm avoids mechanical extrusion damage during production and operation cycles.

LONGi's temperature-controlled alloy interconnection technology leverages the grid-free front design of BC cells, featuring high-precision visual positioning for micron-level layout accuracy and low-temperature fusion processing. This technology effectively releases interfacial thermal stress, guaranteeing the long-term operational reliability of modules.

The intelligent module technology provides each module with its own maximum power point tracking unit, eliminating output imbalances caused by shading and multi-orientation installations while boosting power generation by 5-30%. The dual active and passive rapid shutdown system ensures millisecond-level disconnection of individual modules and de-energisation of the entire station, reducing DC high voltage to below 30V within 20 seconds to mitigate fire risks and comply with global safety codes.

LONGi One OS, an AI-powered integrated energy management platform, is designed for PV generation, energy storage, charging, and load-collaborative scenarios. It integrates real-time electricity tariffs, generation forecasts, load data, meteorological statistics, and historical power consumption records to execute optimized charge and discharge strategies every 15 minutes, maximizing energy storage asset returns. The built-in AI agent provides operational guidance, fault diagnosis, and early warnings, reducing O&M technical barriers by 90%.

The Technology Forest portfolio is the culmination of LONGi's continuous, independent R&D capabilities, with its current commercial products stemming from two to three years of prior verification and iteration. Newly unveiled technologies originate from five to ten years of targeted R&D, showcasing the company's commitment to innovation and its vision for the future of solar energy.

With the launch of the Technology Forest system and the achievement of the 35.5% tandem cell efficiency record, LONGi is poised to revolutionize the solar industry, setting new benchmarks for efficiency, reliability, and performance. As the world transitions towards renewable energy sources, LONGi's innovative technologies are expected to play a crucial role in shaping the future of solar energy and beyond.