High-voltage power supplies for vehicles that eliminate low-voltage batteries

A vehicle includes an electric motor, one or more low-voltage components, a high-voltage battery pack, and a direct current to direct current (DC-to-DC) converter. The high-voltage battery pack includes one or more high-voltage battery strings configured to provide a high-voltage output on a high-voltage bus for powering the electric motor. The DC-to-DC converter is connected to the one or more high-voltage battery strings, and is configured to generate a low-voltage output on a low-voltage bus for powering the one or more low-voltage components.