This article presents a SEPIC based DC-to-DC converter design with the soft switching operation for the wide conversion operation of E-Automobiles. The solar PV source is given to boost converter with the use of Hierarchical Multi-Heuristic Chicken Swarm Optimization (HMH-CSO) based Maximum Power Point Tracking (MPPT) scheme. The converted source is given toSEPIC converter at which the Fuzzy Logic Controller (FLC) is employed. A SEPIC converter is a DC-to-DC converter that converts the fixed range of DC supply to the variable range of DC supply using duty ratio. The zero-voltage source (ZVS) soft switching operation of converter is provided. The converted output is inverted by means of three-phase inverter at which the generation of pulse width modulation (PWM) is made by means of FLC controller employed. The inverted output is given to the load (BLDC motor) by filtering using Low Pass Filter (LPF). Thus, an efficient generation of power is made and is given to the load of BLDC motor side. The performance analysis is made for traditional PID (Proportional-IntegralDerivative) controller and FLC controller and the outcomes attained for both controllers are compared to show the efficiency of proposed FLC controller.