Phase 1:Process Optimization as a Foundation - Advancing from 730 W to 740 W by Mid 2025
The standard bifacial microcrystalline HJT process has achieved 730 W output at 23.5% efficiency for 210mm products in mass production. By optimizing CVD processes, upgrading gettering, and enhancing module’s materials and processes, the output is expected to increase to 740 W by June 2025, with module efficiency reaching 23.8%.
Phase 2: Innovative Combinations to Drive Advancement – Achieving 780 W by Early 2026
By introducing high-mobility target materials, photon firing technology, metal pattern and paste optimization, and incorporating secondary light conversion film, output will reach 750 W by the end of 2025, with efficiency surpassing 24%.
To achieve 24.5%+ of module efficiency that is targeted by back contact (BC) technology while maintaining HJT's high bifaciality, a new quasi-rear polishing process significantly improves rear-side light reflection and absorption, reducing bifaciality losses to less than 1%. These innovations will elevate output to 765 W and efficiency to 24.6%, with minimal hardware upgrade costs, making it feasible for all club members’ champion production lines. In addition, module technology will integrate multi-slicing and negative-spacing with full-screen design, adding 15 W of power while maintaining module dimensions at 1303*2384mm. The upgrade cost for each GW-scale production line will remain under CNY 20 million. By early 2026, champion production lines will produce HJT modules with 780 W output, 25% efficiency, and bifaciality exceeding 85%.
Phase 3: Pushing the Limits Towards 800 W by End of 2026
The roadmap also proposes seedless copper electroplating for single- or bifacial metallization as the next breakthrough. Initial research suggests that this process improves front-side efficiency and reduces contact resistance, offering a 0.5% efficiency increase. Coupled with an innovative ribbon design that reduces light reflection, module output could rise by over 20 W, achieving 800 W with 25.75% efficiency—the highest power and efficiency ever achieved in standard crystalline silicon modules, while maintaining bifaciality above 85%. This will mark the "ultimate process" for crystalline silicon modules before the launch of HJT-perovskite tandem products.
"This is not just a simple power race, but a redefinition of China’s PV capabilities in extreme manufacturing," emphasized Jimmy Xu. "Every watt of increased power comes from the relentless exploration and continuous breakthroughs of our HJT partners. This represents a firm belief and persistent commitment to producing HJT products with the highest conversion efficiency and overall power generation capabilities, using the simplest processes, the fewest materials, and the lowest energy consumption."
