The test field in Yinchuan, China, underwent extensive upgrades in July to improve the accuracy and quality of data, and we restarted in August. Due to monitoring system malfunctions, we did not acquire data on Aug. 14.
We also report the second month of outdoor data from the test installation in Dammam, Saudi Arabia, alongside the updated results from Yinchuan. High temperatures and high irradiance conditions at this site remain unchanged.
Monthly highlights
In August, temperatures at the Yinchuan site decreased and there were more low-irradiance days than in July. Certain products improved their performance, such as the two Astronergy modules, and the JA and SEG panels, which climbed back to the top rank.
After months of operation, it is exciting to observe the dynamic, “competitive” behavior of products, as time passes and as the weather changes.
Astronergy, JA, Runergy, and SEG all had products in the top rank for more than half the time, while AE’s new product has led since its installation in June. It should be pointed out that not only can the well-known, top-tier suppliers perform well, but also other lesser-known suppliers. Further observation and comparison of more high-efficiency products is needed to understand their behavior, and we look forward to more suppliers joining the test fields in Yinchuan and Saudi Arabia.
The performance of the two products installed in Dammam, meanwhile, showed no change, which is also supported by the unchanged prevailing weather conditions. Although these products have a similar ranking difference in Yinchuan (top rank for SEG and second rank for Astronergy) the specific energy yield gap is bigger in Dammam. Longer observation time under different conditions is needed to draw conclusions on what causes these differences. 
George Touloupas and Huatian X
| # | Installation Month | Product | Type | Total 2025 July kWh/m2 |
Total 2025 July Wh/Wp |
July 2025 Rank (Wh/Wp) |
Total 2025 August kWh/m2 | Total 2025 August Wh/Wp |
August 2025 Rank (Wh/Wp) |
| 62 | 2025/5/8 | SEG Solar SEG-BTC-600-BG | Bifacial n-TOPCon | 36.35 | 163.48 | 1 | 36.74 | 183.50 | 1 |
| 63 | 2025/5/8 | Astronergy CHSM66RN(DG)/F-BH-615 | Bifacial n-TOPCon | 36.09 | 159.47 | 2 | 36.33 | 178.31 | 2 |
| Specific energy yield ranking – Yinchuan, August 2025 | |||||||||
| # | Installation Month | Product | Type | Total 2025 June kWh/m2 |
Total 2025 June Wh/Wp |
June 2025 Rank (Wh/Wp) |
Total 2025 August kWh/m2 |
Total 2025 August Wh/Wp |
August 2025 Rank (Wh/Wp) |
| 66 | 2025/6/5 | AE AE605CMER-132-BDS | Bifacial n-TOPCon | 29.80 | 133.29 | 1 | 32.82 | 146.80 | 1 |
| 61 | 2024/12/9 | JA JAM72D42-615/LB | Bifacial n-TOPCon | 29.29 | 130.45 | 2 | 32.84 | 146.28 | 1 |
| 60 | 2024/12/8 | Runergy HY-DH144N8-570 | Bifacial n-TOPCon | 28.70 | 131.39 | 1 | 31.90 | 146.03 | 1 |
| 62 | 2025/3/5 | SEG Solar SEG-BTC-600-BG | Bifacial n-TOPCon | 27.73 | 125.45 | 4 | 32.00 | 144.78 | 1 |
| 63 | 2025/3/5 | Astronergy CHSM66RN(DG)/F-BH-615 | Bifacial n-TOPCon | 29.06 | 128.04 | 3 | 32.75 | 144.32 | 2 |
| 50 | 2024/12/8 | Astronergy CHSM72N(DG)/F-BH-580 | Bifacial n-TOPCon | 28.33 | 128.00 | 3 | 31.87 | 143.97 | 2 |
| 57 | 2024/12/8 | AE AE570CMD-144BDS | Bifacial n-TOPCon | 28.62 | 129.44 | 2 | 31.79 | 143.77 | 2 |
| 59 | 2024/12/8 | DMEGC DM605G12RT-B66HSW | Bifacial n-TOPCon | 29.11 | 129.35 | 2 | 31.69 | 143.22 | 2 |
| 54 | 2024/12/8 | Trina TSM-685NEG21C.20 | Bifacial n-TOPCon | 29.01 | 130.26 | 2 | 31.88 | 143.13 | 2 |
| 56 | 2024/12/8 | Longi LR5-72HGD-585M | Bifacial n-TOPCon | 28.98 | 128.97 | 2 | 32.13 | 142.99 | 2 |
| 58 | 2024/12/8 | SolarSpace SS9-66HD-695N | Bifacial n-TOPCon | 29.24 | 129.86 | 2 | 32.16 | 142.81 | 2 |
| 53 | 2025/1/1 | SEG SEG-575-BTA-BG | Bifacial n-TOPCon | 28.69 | 126.68 | 3 | 32.11 | 141.79 | 3 |
| 51 | 2025/1/1 | Risen RSM132-8-700BHDG | Bifacial n-HJT | 29.32 | 128.98 | 2 | 32.16 | 141.33 | 3 |
This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: editors@pv-magazine.com.
