Rapid identification of faulty PV solar panels

I inspected a large PV installation (over 300 PV solar modules) in the visible and infrared spectrum . The scope of the inspection was finding eventual visible damage (smashed glasses) and damages that can be detected only through electrically testing of each panel (labor intensive) or observing the thermal image (immediate detection) from an angle that minimizes the reflected infrared from the sun. The identification of panels with smashed glass and/or hidden electrical damage was immediate See the smashed glass panel adjacent the chimney in the sample image (thermal and visible). I have added also thermal image I took on another site, this time after minimising the reflected sun light. This technique requires more time to correctly position the drone. However, the outcome is that small defects, faulty diodes, lichens and bird droppings can be detected. The thermal image shows good quality panels not affected by any concerning defect (e.g. hot spot) or environmental problem. Difference in the gradation of color from violet to yellow are due to the reflected incident sun radiation.