pv magazine Test: September 2025 Results
By George Touloupas and Huatian Xu
This article was originally published in pv magazine – November 2025 edition. Learn more about the pv magazine test here.
George Touloupas, Vice President of ESG and New Services at Intertek CEA, and Huatian Xu, Director of Technology and Quality, analyze the September 2025 results from the pv magazine test outdoor installations in Yinchuan, China, and Dammam, Saudi Arabia.
Due to monitoring system malfunctions at the Yinchuan site, we removed data from Sept. 6 to 8 and Sept. 23 to 24. A normalization error in September’s temperature and irradiance chart also prompted us to report two months of data from the Dammam site in this issue. Temperatures trended slightly lower in September and irradiance was slightly higher than in August.
Figure 1: Daily meteo station data from Dammam for August and September 2025
Figure 2: Daily meteo station data from Yinchuan for September 2025
Monthly highlights
In Yinchuan, although there were some days during September with abnormally high temperatures, the temperature continued to decrease, and the samples performed similarly to the preceding month. Further observation and comparison of data of more high efficiency products is still needed to understand the behavior of the products and technologies, and we are looking forward to having more suppliers joining the test fields in China and Saudi Arabia. There was no change in the relative performance of the products installed in Dammam, which is expected, given the negligible change in local weather conditions.
Table 1: Specific energy yield ranking from Yinchuan, August to September 2025
Table 2: Specific energy yield ranking from Dammam, August to September 2025
Figure 3: Specific energy yield of modules Yinchuan and Dammam, September 2025
