The security system dedicated for photovoltaic panels, only in its kind, simple and innovative, it is based on an innovative system of optical sensors to be applied on the back side of the panel to be alarmed: when there is any optical change inside the sensor, a tear from the installation surface or any tamper of the cable, there is an alarm. It can be installed on any panel model and PV plant, and thanks the double operating function, it can operate in stand-alone or on BUS mode. . No false alarm guaranteed.