NOVELTY - The device (1) has a lower panel assembly (3) formed of triangular lower panels (30, 30') that are movable and guided individually in rotation with respect to one another around a longitudinal central axis (35d) so as to be pivoted in a position where the panels are superposed with respect to one another. The panels are movable and guided in rotation so as to be deployed individually in rotation around the axis with respect to one another. A housing permits fixation of the assembly on a bearing axle (20), where each panel of the assembly has a photovoltaic solar energy power source.    USE - Photovoltaic solar energy power supply device for use on a bearing axle of a support e.g. sun umbrella, umbrella, tent and capital (all claimed), for supplying power to an electrical apparatus and a power distribution network, or for charging batteries.    ADVANTAGE - The device can be implemented in a simple and rapid manner. The panels can be superposed with respect to one another so as to reduce the encumbrance of the assembly, thus facilitating the transportation of the device. The configuration of the panels permits the user to easily deploy the panels with respect to one another for using number of power sources, based on the needs of electricity and solar radiation intensity. The configuration of the device permits replacement of any power source by printing documents i.e. advertising displays, thus permitting the device to be used as an advertising support. The power source can be fixed with respect to the panel in a removable manner, thus permitting removal of unused power source and avoiding the risk of theft or deterioration of the unused source. The panel assembly provides sufficient rigidity to the device so as to allow the device to be self-carried with respect to the bearing axle without requiring any additional support.    DETAILED DESCRIPTION - The panels are made of textile material.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a sun umbrella on which a power supply device provided with deployed panels, is fixed.    Photovoltaic solar energy power supply device (1)    Lower panel assembly (3)    Bearing axle (20)    Triangular lower panels (30, 30')    Longitudinal central axis (35d)