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The charging unit of battery electric vehicle (BEV) is one of the primary subsystems which allows its interconnection with the charging facility. Due to the nonlinear behavior of the power conditioning circuitry and its sensitivity to external disturbances, robust nonlinear controller is required to achieve various control objectives like output voltage regulation and power factor correction in grid to vehicle (G2V) mode. For this purpose, an integral backstepping sliding mode controller (IBS-SMC) and backstepping sliding mode controller (BS-SMC) is designed in order to achieve these objectives. But their responses exhibit the phenomenon of chattering which is highly undesirable and can cause heat and power losses in the system. In order to mitigate the effect of chattering, supertwisting sliding mode controller (ST-SMC) has been designed which not only reduces the effect of chattering but also exhibits a better dynamic …