Unmanned aerial vehicles are becoming a reliable and useful instrument in monitoring and diagnostic services in the energy field. Operation and maintenance is a crucial factor for photovoltaic (PV) plant inspection and control activities, which currently are quite hard to be performed due to manual and dispersive procedures. The automation of the monitoring techniques will become, in future, an essential task in this market, and unmanned aerial system technology can play a role in it. This paper proposes a novel, comprehensive, and innovative approach in order to automate the inspection and prognostic procedure by means of designing a control system in order to provide accurate information on operating conditions of PV plants. The system is...