Abstract
Low efficiency of the existing photovoltaic cells is one of the important problems of the alternative energy. To increase efficiency of PV panels up to 40-55% solar trackers are used. Continuous sun tracking is complex and it could require significant energy costs. To reduce energy consumption of sun trackers the methods of discrete solar tracking could be implemented. There are three different methods of discrete solar tracking for photovoltaic panels. The first method with a minimum number of steps is called three-step sun tracking, when PV panel rotates 3 times a day: morning, noon and evening. The second method with a maximum number of steps is the continuous-discrete sun tracking, when the angle of rotation is in the range of 1-3°. The third method with an average number of steps, which is calculated with optimal ratio of energy losses and efficiency increase. In the paper, the authors are analyzing limitations of existing discrete sun tracking methods, making comparison of it. Each of the method has its own advantages and disadvantages. Taking them into account, it could be universal discrete sun tracking method developed.
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