Photoluminescence imaging of silicon modules in a string

Spectral imaging techniques are a powerful tool for surveillance and monitoring of degradation mechanisms in PV modules. Luminescence images solar modules have until recently been predominantly acquired controlled laboratory settings. Recent attempts made detecting luminescence daylight. This study aims to present proof concept detection photoluminescence with sunlight excitation. It enables several string as well strings simultaneously by changing the operating point through wireless contactless communication one or more inverters. new approach is validated electroluminescence technique an already established under Due inverter's reaction time, change illumination results lower image quality. However, up-to-date equipment, this promising identification certain which can be detected resolution such large area damage inactive areas. Further studies needed optimize method potentially use it connection unmanned aerial vehicle inspection.