Solar electric winder for a self-winding watch

A solar electric winder for a self-winding watch including:

• a rotating support, a motor arranged to drive the rotating support, an accumulator arranged to power the motor, a solar cell arranged to charge the accumulator, an internal clock, an electronic means of controlling the motor, and a user control interface for the electronic means;
• wherein the winder includes a light sensor connected to the electronic means, and wherein the electronic means is connected to the internal clock and arranged to be controlled by the user to be selectively placed in one or other of a plurality of operating modes, said plurality of operating modes including a first mode in which the rotating support is only driven when the winding mechanism is illuminated and a second mode in which a programme for driving the rotating support is started at a pre-selected time by using the control interface.