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Field Experience of UVFL Inspection with Drone
J. Lin, B. Ku, S. Chen
Photovoltaic Module, Cracks, Fluorescence, UV, Drone, UAV
PV Systems and Storage – Modelling, Design, Operation and Performance
Subtopic: Operation, Performance and Maintenance of PV Systems
Event: 36th European Photovoltaic Solar Energy Conference and Exhibition
Session: 5BO.6.1
1299 - 1301
ISBN: 3-936338-60-4
Paper DOI: 10.4229/EUPVSEC20192019-5BO.6.1
0,00 EUR
Document(s): paper


UVFL is an emerging inspection method which is useful to check the defects in the installed PV modules. The cracks in the PV cells can be seen when the module is under UV exposure, and it is easier than EL for checking the health condition of the PV modules. However the florescence induced by the UV light is too weak that it can only be seen within a short distance. The inspectors need to walk through all PV panels in a PV plant to check the defects, which is time consuming and require huge human resource. Furthermore, the UV light is harmful to human eyes, so the inspection in short distance increases the risk of the inspectors. In this work we developed one set of devices to perform the UVFL inspection with a drone, and it greatly saves the inspection time and effort, and also keeps the inspectors in a safe distance from the UV light. With the inspection tool, a special UVFL mode was found in the field, and the root cause of the phenomenon was determined through the comparison of the module materials.