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China proposes stricter efficiency standards for solar manufacturers

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China proposes stricter efficiency standards for solar manufacturers

China’s Ministry of Industry and Information Technology (MIIT) has proposed stricter efficiency requirements for photovoltaic manufacturers, raising minimum average conversion efficiencies for solar cells and modules and introducing separate thresholds for TOPCon, heterojunction (HJT) and back-contact (BC) technologies.

The draft 2026 Photovoltaic Manufacturing Industry Specifications, released for public consultation on Oct. 16 alongside proposed revisions to the system for listing compliant manufacturers, would replace the 2024 rules. The consultation period runs until Nov. 15.

For new and expanded solar cell production lines, the proposed minimum average conversion efficiencies are 26.2% for n-type TOPCon, 26.0% for HJT and 26.6% for BC technologies. The 2024 rules set a uniform 26.0% threshold for new n-type cells. Existing production lines would need to achieve efficiencies of at least 25.3% for TOPCon and HJT and 25.6% for BC, compared with the previous 25.0% requirement for n-type cells.

For new and expanded module production, the proposed minimum efficiencies are 24.2% for TOPCon, 24.0% for HJT and 24.4% for BC, up from a uniform 23.1% threshold for n-type modules under the 2024 rules. Existing module production would face minimum efficiency requirements of 23.4% for TOPCon and HJT and 23.7% for BC. All thresholds refer to average conversion efficiency, with bifacial modules assessed on front-side performance.

The draft also removes separate performance categories for multicrystalline and p-type crystalline silicon products while introducing requirements for emerging photovoltaic technologies. New tandem solar modules would need to achieve at least 27% efficiency, compared with 25% for existing tandem modules. New perovskite modules would face a minimum efficiency threshold of 20%.


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