Although hail events are relatively infrequent, they pose a significant risk when they occur, as they can directly impact the mechanical stability of PV modules, including the glass and solar cells. The likelihood and severity of hail damage depend on location, with Alpine foothills identified as higher-risk areas (see Alpine PV Stressors). Hailstones can vary…

Photovoltaic modules installed in cold climates or at high altitudes are exposed to extreme mechanical and thermo-mechanical stresses. Low temperatures and rapid temperature fluctuations influence solar cells, polymeric materials – encapsulant and backsheet – and also electrical interconnections, cable insulation, and connectors. While low ambient temperatures generally slow chemical ageing processes [1], they significantly increase…

PV modules installed in cold, snowy, and high-altitude environments are exposed to significant mechanical stresses from snow accumulation, ice formation, and wind loading as highlighted in Alpine PV Stressors. Heavy or uneven snow buildup increases bending forces on the module surface, while strong winds introduce both static and cyclic mechanical loads across the laminate. At…

Shading on photovoltaic (PV) modules directly reduces the electrical output of the module by reducing the amount of sunlight reaching the solar cells. This can be caused by a variety of objects such as trees, buildings, snow accumulation, soiling or even self-shading (Figure 1 and Figure 2). When a cell is shaded, it produces less…