The invention concerns a circuit for charging a battery by means of a photovoltaic module, including: input and output terminals intended to be respectively coupled to the module and to the battery; a converter including input and output terminals respectively coupled to the input and output terminals of the charging circuit; a control circuit including power supply terminals coupled to the output terminals of the charging circuit; a switch coupling one of the output terminals of the converter to one of the output terminals of the charging circuit; and a detection circuit configured, when the voltage between output terminals of the charging circuit exceeds a threshold, to send an order to turn off the switch and stop the converter for a predetermined period.