In this paper, different kinds of sensors have been used in a first trial campaign to detect PV module failures, namely a thermal camera (MicroCAM 640 by Thermoteknix Systems Ltd.) and an HD photocamera (Nikon1-v1), which were mounted on the Nimbus EosXi and Nimbus PLP6 platforms to capture precise pictures and videos of PV panel defects, both in the visible and infrared ranges. Thermal imaging cameras show themselves to be reliable and fast tools for PV module evaluation. Using thermal cameras in PV module inspection has more advantages than using other monitoring devices. In fact, thermal cameras can be used to scan PV modules during their normal operation with no need of system shutdown. Moreover, thermal cameras on UAVs can scan a large PV array field within a short time frame. However, a visual inspection can be used to correct identification of the failure. The use of UAVs allows us to analyze large areas in a short time, where there is both thermal imaging and visual imaging.