Patent ID: 7109461

Claim:
A solar tracking system for controlling the alignment of a solar power generator with respect to the sun, said generator having a solar radiation receiver comprising an array of power generating photovoltaic cells for converting solar radiation into electric current and a solar radiation collector for collecting solar radiation and directing said radiation towards said receiver, said system comprising: a comparison mechanism for receiving and comparing a first signal from a first cell of said photovoltaic cells, the first signal being indicative of exposure of said first cell to solar radiation from said collector and a second signal from a second cell of said photovoltaic cells the second signal being indicative of exposure of said second cell to solar radiation from said collector and for producing at least one comparison signal therefrom; and control mechanism for controlling said alignment according to said comparison signal; wherein said first cell and said second cell both contribute to the power output of said solar power generator and provide sianals for the alignment of said solar power generator.