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Modeling Efficiency of Inverters with Multiple Inputs

Hansen, Clifford H.; Johnson, Jay; Darbali-Zamora, Rachid; Gurule, Nicholas S.

Inverters convert DC power to AC power that can be injected into the grid. Many inverters offer multiple, independent maximum power point trackers (MPPTs) to accommodate photovoltaic arrays with different orientations or capacities. No validated model for overall DC-to-AC power conversion efficiency is available for such inverters. Herein, we propose a mathematical model that describes the efficiency of a multi-MPPT inverter and present validation using a commercial inverter with six MPPT inputs.