As temperatures drop and snow begins to blanket regions across the Northern Hemisphere, solar installations face one of their most demanding operational periods of the year. Designed to endure extreme weather conditions over decades of service, DAS Solar's N-type modules have once again demonstrated their outstanding resilience through a comprehensive series of laboratory and real-world cold climates.
To validate the long-term reliability of its modules in harsh environments, DAS Solar conducted multiple stringent assessments at its certified PV laboratory, including humidity freeze, damp leakage, static and dynamic mechanical load, and hail impact tests. These trials replicate decades of exposure to wind, snow, and temperature fluctuations, providing a scientific measure of durability under extreme conditions.
During static load testing, DAS Solar N-type modules withstood pressures of 5,400 Pa on the front and 2,400 Pa on the rear, cycled three times with no signs of deformation, glass breakage, or output degradation. In dynamic load testing, the modules were subjected to more than 1,000 load cycles of 1,500 ± 100 Pa to simulate long-term stress from wind and seismic activity. Following the tests, the modules maintained full structural integrity and stable power performance, proving their high mechanical strength and long-term reliability.
Hail impact is another common and destructive natural hazard for PV systems. DAS Solar evaluated its N-type modules using 35 mm hailstones weighing 20.7 g and traveling at a velocity of 27.2 m/s. After 11 direct impacts comparable to being struck by golf ball-sized ice, the modules showed no visible damage or internal defects, and power degradation was limited to just 0.07%, far below the IEC standard threshold of 5%. The results confirmed the modules' exceptional impact resistance and product safety.
In environments with high humidity and subzero temperatures, condensation and meltwater can lead to insulation breakdown or leakage. To test insulation reliability, DAS Solar's damp leakage experiment applied a 1,500 V DC voltage while spraying water onto the junction box and submerging module edges. The insulation resistance remained above 1.9 GΩ with no evidence of surface cracking or dielectric failure, nearly twice the IEC requirement.
Beyond the lab, DAS Solar's N-type modules have also proven their resilience in the field. Since October 2023, a full range of N-type products have been operating in Mohe, Heilongjiang Province, one of the most severe cold regions in the world. With temperatures dropping to -53℃ and continuous snow cover exceeding 8 cm, the modules endured months of freezing, blizzards, and heavy wind. Throughout the test period, all systems maintained stable output with no microcracks, no glass breakage, and no functional failure, demonstrating the proven stability of DAS Solar's materials and process design.
Performance results from the Mohe project were equally impressive. In January, when daily average temperatures fell below -30℃, DAS Solar's N-type modules achieved specific yields of 52.58 kWh/kW. The bifacial design accelerated snowmelt through rear-side irradiation, increasing energy output by more than 60% compared with monofacial modules. Meanwhile, DAS Solar's lightweight modules achieved 28% higher generation gain than conventional single-glass modules under melting conditions, thanks to their superior surface thermal characteristics.
All testing was conducted within DAS Solar's in-house PV laboratory, accredited by CANS and certified as a witnessed laboratory by TÜV Nord and TÜV SÜD. The facility's advanced capabilities ensure that every DAS Solar product meets or exceeds international IEC standards before mass production. Each module undergoes multiple EL inspections and reliability tests during manufacturing to guarantee consistent quality and performance.
As a global leader in N-type PV technology, DAS Solar remains committed to continuous R&D investment and rigorous quality control. Withstanding temperatures down to -53℃ without performance loss, the company's N-type modules have set a new benchmark for cold-climate reliability. Moving forward, the company will continue to deliver high-efficiency, durable, and environmentally sustainable products, empowering customers in all regions to achieve stable clean-energy generation even in the harshest conditions.
