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This paper is to design a novel chaotic sinusoidal pulse width modulation (SPWM) for grid-connected inverters, which has the advantages in design flexibilities and low costs, for reducing electromagnetic interference (EMI). Furthermore, the proposed chaotic SPWM can also be used to improve the total harmonic distortions (THD) of grid-connected currents without excessive harmonics. Here, a chaotic carrier is the key to realize the chaotic SPWM control. Finally, simulation and experimental results are given to show the validity of the chaotic SPWM in reducing EMI.