To adjust electric energy for an electronic apparatus by mounting a stand system having a hinge element between a photovoltaic module surface and a supporting surface, and connecting a multiple-voltage controller between a module and a load, thus disposing the module in the optimum direction to an incidence angle.
A stand system having a hinge element between the front surface of a module 50, and a supporting surface is mounted so that the front surface of the module 50 may be directed in the vertical direction to the sunlight from an electromotive light source. The electric output from the module 50 is fed to a multiple-voltage controller 71 involving a voltage regulator through a conductor 70 to supply light source to electronic apparatuses 73, 75. Therefore, the maximum efficiency of power output from a photovoltaic cell 51 is displayed on a display assembly 52, thus it is possible to adjust the angle of the stand system to the front surface of the module 50 for maximum power output of the cell 51, and feed maximum energy from the photovoltaic module to a load.
CHARLES MARTIN
SCHIFF MORTON
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