The Buck-Boost converter, that plays a significant role in scaling up or down the DC voltage at the input with no need of any intermediary ac stage, is the most notable DC–DC converter. Conventional converter switching causes power losses during switching, which lowers system efficiency. In this study, Buck-Boost converters are powered by zero voltage switching (ZVS)-based soft switching rather than auxiliary switches. The ZVS Buck-Boost converter, which functions as a resonant Buck-Boost regulator, was designed using a new methodology in this study. The Buck-Boost converter has been modelled, and the required output simulation results and waveforms are shown. MATLAB Simulink was used to create and simulate an 850 W prototype model.