In the present invention, a main switch circuit (13) is provided between an electric power line (PL), to which voltage outputted from a solar cell (11) is applied, and a battery module (12). A protection circuit (19) turns OFF the main switch circuit (13) ...

An apparatus (100) for protecting a circuit (200) from an input voltage comprises a switchable element (10) arranged to couple the input voltage (V IN ) to the circuit (200) in response to a first control signal (DRV1) having a first value and to decouple ...