Abstract: A photovoltaic installation includes a photovoltaic generator, electrical connector lines, an enabling signal source, and an arc discharge detector. The generator is configured to generate a DC voltage when an enable signal is applied to the generator. The electrical connector lines connect the generator to a voltage converter for the voltage converter to receive the DC voltage from the generator. The enabling signal source is configured to apply the enable signal to the generator. The arc discharge detector is configured to detect for an arc discharge by detecting for the presence on the connector lines of an AC voltage signal having characteristics indicative of an arc discharge. The arc discharge detector is further configured to cause the enabling signal source to stop applying the enable signal to the generator when an arc discharge is detected.