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The need for a maximum power point tracker in a photovoltaic system is explained. A variety of photovoltaic panel maximum power point tracking methods are then briefly compared. The optimal method from those compared, where the photovoltaic panel power-voltage curve is scanned periodically, and the maximum power point tracker is controlled by current, is discussed in detail. Problems with this implementation are highlighted, and the design of a voltage-controlled implementation using the same power-voltage curve scan is presented. Problems and advantages of this system are given.
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Bekker et al. (2005) studied this question.
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