A PV module needs to be able to operate in different types of extreme weather conditions and an infinite increase in its size has the potential to bring significant risk to power plants. Hail is a normal global meteorological phenomenon, meaning that analysis of the performance of different size modules in such conditions is increasingly important. LONGi has conducted new hail performance testing which indicates that, whereas its Hi-MO 5 module (based on a 182mm wafer with dimensions of 2256×1133mm, 2.56m2), is able to withstand testing, the oversized module (dimensions 2384×1303mm, 3.11m2) is unable to do so. A TÜV SÜD report has also demonstrated that Hi-MO 5 was successful in passing a 35mm hail impact test.