LONGi achieves record with 25.4% c-Si solar module efficiency

Chinese solar panel manufacturer Longi Green Technology Energy Co, or LONGi, has developed a crystalline silicon solar module with 25.4% efficiency, setting a new world record, the company has said.

The Fraunhofer Institute for Solar Energy Systems ISE in Germany has officially certified the record for the module, which is based on LONGi’s independently developed HPBC (Hybrid Passivated Back Contact) 2.0 back contact solar cells, LONGi said.

The new level surpasses the 25% benchmark efficiency record held by photovoltaics researcher Martin Green and the National Renewable Energy Laboratory (NREL). It has also exceeded the 24.9% efficiency of an Interdigitated Back Contact (IBC) module achieved earlier in 2024.

Back contact technology, like HPBC, involves moving electrical contacts to the rear of the solar cell. This eliminates shading caused by front contacts, allowing more sunlight absorption and boosting energy efficiency.

LONGi first introduced a version of the HPBC technology in 2022. The next generation, HPBC 2.0, is set for release in 2025.

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