However, the distance between the PV array and the UAV in this case did not allow the accurate identification of additional information on the type of problem that was causing the overheating of some cells. The use of the second type of UAV allows us to get closer to the shelter and, consequently, to the modules. In this case, we performed a second analysis using a different sensor, namely a camera in the visible range. Figs. 9 and 10 show some of the results obtained. First picture shows that the defect detected by the thermal analysis is because of breaking of the glass (a mechanical shock). The second picture shows the snail trail phenomenon.