Four-Year Daqing Field Test Confirms Growing Power Generation Advantage of TOPCon Modules

JinkoSolar has highlighted the findings of the Field Test Results (Release) 2025 from the National Photovoltaic and Energy Storage Demonstration Platform at Daqing, which show that N-type TOPCon modules consistently outperformed N-type BC modules over a four-year evaluation period.

The Daqing testing base, located in China's Heilongjiang Province, operates under challenging climatic conditions, with an average annual temperature of 5.5°C and solar irradiance levels typically ranging between 900 and 1,000 W/m². These conditions provide a suitable environment for assessing the real-world performance, reliability and durability of photovoltaic technologies.

The first phase of the demonstration project began in January 2022 and involved 12 manufacturers and 29 types of PV modules with a combined installed capacity of 24.25 MW. Continuous monitoring over four years generated operational data intended to reflect actual field performance rather than laboratory conditions.

According to the report, N-type TOPCon modules delivered an average power generation gain per watt of 2.27 percent compared with N-type BC modules during the evaluation period. The performance gap widened over time, with TOPCon modules recording a gain of 1.39 percent in 2022, 2.68 percent in 2023 and 3.49 percent in 2025.

The report attributes the superior performance of TOPCon technology to factors including stronger bifacial power generation capability, a favorable temperature coefficient and stable long-term power output. These characteristics contributed to higher energy yields across different operating conditions.

The evaluation also found notable differences within the TOPCon category itself, indicating that power output can vary by around 2 percent between leading products and standard offerings. The findings suggest that manufacturing quality, process control and technological expertise play a significant role in determining long-term project returns.

JinkoSolar said that  its Tiger Neo series modules ranked among the leading TOPCon products in the assessment, citing the company's large-scale mass production experience, ongoing technology development and quality control measures.

The company further said that the Daqing results provide further evidence of TOPCon's competitiveness as a mainstream N-type photovoltaic technology and reaffirm its suitability for large-scale solar projects. JinkoSolar added that it will continue to monitor performance data from major testing platforms and focus on improving module efficiency, reliability and long-term value for customers.