LONGi Unveils World's First 700W HIBC Solar Module with 25.9% Efficiency and Record Power Density

LONGi Launches Breakthrough 700W HIBC Solar Module with 25.9% Efficiency

At the 18th SNEC International Solar Photovoltaic Exhibition 2025, LONGi introduced its latest innovation: a Hybrid Interdigitated Back Contact (HIBC) solar module series now entering mass production. The new modules deliver an industry-first power output exceeding 700W using the standard 2382mm × 1134mm format, reaching a record-breaking power density of over 259 W/m². With a production efficiency of 25.9%, the launch signals a major leap forward—ushering in a new era of solar technology with efficiencies surpassing 25%.

LONGi’s HIBC Technology Marks New Milestone in Solar Efficiency

LONGi’s HIBC (Hybrid Interdigitated Back Contact) technology represents a breakthrough blend of heterojunction (HJT) and back-contact (BC) solar cell designs. This innovative approach leverages a composite passivated back contact structure capable of operating efficiently across both high and low temperatures. For the first time, LONGi has successfully brought this advanced architecture into large-scale mass production.

Chairman Zhong Baoshen called the launch a major milestone in LONGi’s ongoing innovation journey and a critical step forward in advancing back-contact solar technology. He emphasized that conversion efficiency is the cornerstone of photovoltaic (PV) advancement and the key to delivering real value to customers.

“Boosting efficiency within a fixed module size maximizes energy yield per unit area,” Zhong explained. “Simply increasing power by stacking layers or enlarging panel size offers limited benefits and can compromise reliability and quality.”

Underscoring its leadership in solar innovation, LONGi set a new world record in April 2025, when Germany’s Institute for Solar Energy Research Hamelin (ISFH) certified its HIBC cell at a conversion efficiency of 27.81%.

LONGi’s HIBC 700W+ Module Sets New Standard for Solar Efficiency

LONGi’s newly launched HIBC module has set a new benchmark in the solar industry, delivering over 700W of output within a standard 2382 × 1134 mm footprint. With a power density of 259 W/m² and module efficiency reaching 25.9%, it is currently the most efficient industrial photovoltaic product available.

“This module redefines performance by combining high value with reliability through improved unit yield,” said Zhong Baoshen, Chairman of LONGi.

Unlike typical 700W modules—often built on a larger 2384 × 1303 mm frame—LONGi’s design achieves 34 W/m² more power density while using 0.4 m² less space. This challenges the traditional mindset that “bigger means better,” and underscores the importance of power density as a more accurate measure of customer value.

The HIBC modules also utilize advanced high-density cell interconnection, boosting the cell coverage ratio from 93.2% to 95.1%. This expands the effective light-absorbing area, further improving efficiency without compromising long-term durability or performance.

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LONGi Pioneers the 25%+ Efficiency Era with Breakthrough HIBC Technology

LONGi is steering the solar industry into a new era of efficiency with its HIBC (Hybrid Interdigitated Back Contact) technology, pushing mass-produced photovoltaic modules beyond the 25% efficiency threshold. The company’s new 700W module merges high-quality HJT passivation with cutting-edge back-contact architecture, setting a new standard for solar performance.

“In less than three years, we’ve elevated module efficiency to a whole new level,” said Chairman Zhong Baoshen. “This rapid progress showcases not only the scalability of back-contact technology but also its tremendous potential for future efficiency gains.”

Solar energy pioneer Professor Martin Green from the University of New South Wales, often referred to as the “Father of Solar Energy,” praised LONGi’s achievement. “In our latest global solar cell efficiency rankings, LONGi’s HIBC technology claimed the top spot,” he noted, attributing the accomplishment to the company’s unwavering focus on advancing back-contact designs.

Further solidifying its leadership, LONGi unveiled the EcoLife series at the Intersolar exhibition on May 7. This mass-produced product line, built on HIBC technology, includes modules with cell efficiencies of up to 27.3% and module efficiencies exceeding 25%.

LONGi’s Back Contact Ecosystem Reaches Major Milestones Since 2023 Launch

Since the launch of its Back Contact (BC) ecosystem in 2023, LONGi has made significant strides in building a robust and collaborative platform to support next-generation solar technology. Speaking on the progress, Chairman Zhong Baoshen shared that by the end of May 2025, the company had formed technical collaborations with 191 global partners and signed 55 formal agreements across seven core sectors: silicon wafers, solar cells, modules, system solutions, hydrogen energy, biomass, and engineering technology. These partnerships have already generated a revenue of 1.95 billion yuan.

“Our vision has always been to plan with the future in mind—creating fertile ‘black soil’ for the healthy, sustainable growth of the solar industry,” Zhong said.

The LONGi BC Ecosystem is more than a product initiative—it’s a vertically integrated, end-to-end platform encompassing research and development, manufacturing, supply chains, and application systems. Designed around its advanced back contact solar technology, the ecosystem provides the foundation for scaling innovation and delivering real-world impact.

The operational blueprint for the ecosystem was unveiled at the opening of LONGi’s Global Distributed R&D Center on July 3, 2024. Looking ahead, the company plans to deepen its global collaborations to accelerate the adoption of BC technology across both industrial and residential applications.