Comparação de desempenho entre inversores: central, string, microinversores e otimizadores

Abstract

This study compares the performance of four types of photovoltaic inverters — central, string, microinverter, and optimizers — through simulations using the PVSyst software. Three installations with different levels of shading and two types of modules (550 W and 255 W) were analyzed, varying the Installation Performance Factor (IPF = 1.33; 1.00; 0.67). The main evaluation criteria were: energy generated, inverter losses, and performance ratio (PR). The results showed that the string inverter with optimizers delivered the best overall performance, especially in environments with losses. The microinverter performed well only under ideal conditions. The central inverter was the least efficient in almost all scenarios. The 550 W module outperformed the 255 W module in all tests. The study reinforces the importance of selecting the inverter technology according to site conditions.