This document provides a description and demonstrations of a versatile performance model forthe power inverters used in photovoltaic (PV) systems. These inverters convert the direct current(dc) power provided by an array of PV modules to alternating current (ac) power compatiblewith the utility power grid. The inverter performance model can be used in conjunction with aphotovoltaic array performance model [1, 2, 3] to calculate expected system performance(energy production), to verify compatibility of inverter and PV array electrical characteristics,and to continuously monitor inverter performance characteristics that may indicate the need forrepair or maintenance.
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