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One alternative for the processing of energy acquired by photovoltaic panels is the use of phase-controlled inverters associated with multi-pulse autotransformers, which is nothing more than a dual system for multi-pulse rectifiers. This converter has advantages related to robustness, low maintenance, reliability and low cost. Another important feature is that the use of transformers with specific displacement reduces the quantity of harmonic current injected into the grid. This paper will present this converter and proposes the use of Maximum Power Point Tracking (MPPT) acting on the average input voltage of the inverter, using the trigger angle to vary the average voltage of the converter and keep it operating at the maximum power point of the PV panels.