As a product operating for 25 or even 30 years, generating electricity continuously is essential for a PV module to maximize value for customers. Therefore, the module should be designed in consideration of its ability to resist extreme climatic conditions throughout its full life cycle. To verify the ability of a module to resist external mechanical stress, LONGi and TÜV NORD jointly carried out a wind tunnel test to measure its ability under a dynamic load, with LONGi also carrying out a static load test on a large-size module (LONGi Hi-MO 5, 2.26×1.13m) and an oversized module (2.38×1.30m), to simulate bearing capability under an outdoor snow load. The test results showed that the rigidity of both the monofacial and bifacial Hi-MO 5 is better than that of the oversized module and can pass the thresher test at a wind speed of 60 m/s. The static load test showed that the deformation of both the monofacial and bifacial Hi-MO 5 module was less than 45 mm, and their anti-crack abilities were excellent.