Disclosed is a motorized drive device for a closure or solar protection home-automation facility which includes an electromechanical actuator, an electronic control unit and a standalone electric power supply device. The electronic control unit is configured to detect electric power supply and supply interruption periods of the electromechanical actuator from at least one photovoltaic cell, using only a unit for measuring a magnitude linked to the electric power supply of the electromechanical actuator by the at least one photovoltaic cell, and resetting at least one portion of the data stored by the electronic control unit, following the simulation of a sequence of electric power supply and supply interruption periods of the electromechanical actuator, wherein the electric power supply and supply interruption periods are detected via measurement elements.