The system is based on the installation of the Optical Fibre between the panels, so to make impossible the theft without to interrupt itself, and generate an alarm to send to system of concentrator modules. The innovative double operation, stand-alone and on BUS, enables both the connection with any alarm signal and communication device (stand-alone mode) and the communication with the control panel Solar Defender (on BUS mode). User is so free to decide how to receive and mange the alarm events, considering his own security and economic needs.