PVEL’s Hail Stress Sequence (HSS) subjects modules to the equivalent impact energy of natural hail and simulates post–hail impact field conditions to assess potential power loss. Strong performance in hail testing is important for projects deployed to hail–prone regions.
Hailstorms are increasingly frequent in certain regions and can be a severe risk to PV modules. PVEL’s HSS uses lab–manufactured hail (ice balls), the characteristics of which – size, mass, density, speed, and angle of incidence – are carefully controlled to create consistent impact energies for result comparison across BOMs and model types. HSS results allow PV module buyers to benchmark the hail resistance of different PV modules.