The advantages of Sun tracking for planar silicon solar cells

Experimental results comparing the power output of a Sun tracking solar cell with that of a stationary solar cell indicates that the tracking cell will produce over 30% more electrical energy in the course of a relatively clear day than will the stationary cell. A mathematical treatment of the problem agrees remarkably well with the experimental results predicting only slightly greater gain for the tracking cell than found experimentally. This difference can be explained by the lack of perfectly clear days during experimental testing. In fact, when a great deal of haziness or cloud cover occurs the output gain of the tracking cell over the stationary cell rapidly disappears.