When a system requires several different DC voltages
A DC/DC converter can be used when several DC voltages are required in one system. It is relatively common for the propulsion to have one system voltage while maneuvering and instrumentation require another. For example, forklifts with 48V or 80V for propulsion and 24V for instrumentation. Smaller utility vehicles are powered by both 48V and 96V, while the instrument is supplied with 12V.
DC/DC converters are also used to separate the primary power supply from connected equipment, preventing the occurrence of unwanted currents and at the same time creating an isolated and fully regulated voltage supply for connected equipment.