VEHICULAR POWER SUPPLY SYSTEM
A vehicular power system (1) comprises a battery unit (2), a high-capacity unit (3), and first and second connectors (4) for supplying a first output voltage and a second, different output voltage, wherein each connector is arranged to receive one or more parallel daughter boards (7). A daughter board comprises circuitry forming a DC-to-DC converter across the battery unit when the daughter board is received in the connector. The DC-to-DC converter is configured to supply the respective output voltage.