Chinese solar cell and module, and energy storage system (ESS) supplier JinkoSolar has claimed it has independently developed N-type tunnel oxide passivated contact (TOPCon) modules with a maximum conversion efficiency of 25.58%.

The conversion efficiency has been certified by the German testing and certification service company TÜV SÜD.

Jinko also claimed the National Photovoltaic Industry Metrology and Testing Center in China verified the company’s 182N-type monocrystalline silicon battery as having a full-area conversion efficiency of 27.02%.

The company aims to upgrade over 40% of its production capacity this year and establish 40–50 GW of high-power TOPCon capacity by the end of 2025. This latest TOPCon capacity can achieve a maximum power of 670 W, with a module efficiency of up to 24.8% and a bifaciality of 85%.

Jinko attributed the module efficiency breakthroughs to advanced technologies, including metalization laser enhancement, high-quality emitter passivation, and local absorption passivation contact on the battery side, as well as key innovations such as integrated film graphic technology, SMBB ultra-multi-main grid technology, and reflective film technology on the module side.

For the breakthroughs in module technology, it credited integrated film graphics, super multi-busbar ultra-multi-main grid, and reflective film technologies.

In January this year, JinkoSolar Holding claimed that its N-type TOPCon-based perovskite tandem solar cell achieved a conversion efficiency of 33.84%, surpassing its previous record of 33.24%. The Shanghai Institute of Microsystem and Information Technology, a research institute affiliated with the Chinese Academy of Sciences, independently tested this claim.

Jinko was the top solar module supplier in 2024, according to Mercom’s recently released India Solar Market Leaderboard 2025. Its modules accounted for 15.7% of the modules shipped to India.

The company expects Q2 2025 module shipments to range between 20 GW and 25 GW, with full-year shipments reaching 85 GW to 100 GW. It aims to achieve a year-end production capacity of 120 GW for mono wafers, 95 GW for solar cells, 130 GW for solar modules, and 40 GW to 50 GW for third-generation TOPCon modules.