Safety system for independent management of the lighting and/or signalling of a vehicle, such as semi-trailers, trailers, campers, trucks, said system being capable of recovering alternative energy and converting it into electric energy, accumulating the electric energy in suitable batteries and making it available to the lighting and/or signalling of said vehicle, if necessary, in situations that ensure improved road safety, characterised in that it comprises at least: a. a generator system, b. a converter circuit or load adjuster, c. a control unit, d. a battery pack, e. a photoelectric sensor or a photodetector that reports to the control unit whether the vehicle is in a zone with or without light, f. a remote control and a receiver, which activate and/or deactivate the safety system, allowing to voluntarily keep a parked vehicle non lighted, g. a connecting plug for connecting the system to the lighting system of the vehicle; wherein said converting circuit or load adjuster is suitable for adjusting the current dispensed by the generator so as to make the current suitable for the field of use of the battery; when a first MOSFET runs, the battery charges, whereas when a second MOSFET runs, the battery supplies the charge: wherein the first MOSFET is driven by a comparator the ensures protections against battery overcharge, whereas the control signal of the second MOSFET protects the battery, preventing it becoming totally discharged; the signals managing the load adjuster or converter circuit are managed by the control unit, comprising a microprocessor that is able to manage battery charging/discharging, to determine when to supply the charge and to manage the different sensor and control signals of the system, wherein the plug 8, when connected to a tractor and to a trailer/semi-trailer, ensures the flow of current from the tractor to the trailer/semi-trailer when the tractor is running, and if the tractor is switched off, it ensures the flow of current from the safety system to the lighting system of the trailer/semi-trailer, but it never ensures the flow of current from the tractor to the kit safety system, wherein the safety system does not affect the operation of the electrical system of the tractor. a. a generator system, b. a converter circuit or load adjuster, c. a control unit, d. a battery pack, e. a photoelectric sensor or a photodetector that reports to the control unit whether the vehicle is in a zone with or without light, f. a remote control and a receiver, which activate and/or deactivate the safety system, allowing to voluntarily keep a parked vehicle non lighted, g. a connecting plug for connecting the system to the lighting system of the vehicle; wherein the first MOSFET is driven by a comparator the ensures protections against battery overcharge, whereas the control signal of the second MOSFET protects the battery, preventing it becoming totally discharged; the signals managing the load adjuster or converter circuit are managed by the control unit, comprising a microprocessor that is able to manage battery charging/discharging, to determine when to supply the charge and to manage the different sensor and control signals of the system, wherein the plug 8, when connected to a tractor and to a trailer/semi-trailer, ensures the flow of current from the tractor to the trailer/semi-trailer when the tractor is running, and if the tractor is switched off, it ensures the flow of current from the safety system to the lighting system of the trailer/semi-trailer, but it never ensures the flow of current from the tractor to the kit safety system, wherein the safety system does not affect the operation of the electrical system of the tractor.