POWER SUPPLY SYSTEM AND CONTROL PROGRAM

A power supply system includes a plurality of main batteries that are connected in parallel to a power supply bus, and at least a single conversion circuit that converts power input from the main batteries to a primary-side terminal pair and outputs the converted power from a secondary-side terminal pair. A positive electrode and a negative electrode of the main battery are respectively connected to the primary-side terminal pair of the conversion circuit. The secondary-side terminal pair of the conversion circuit are connectable in series to the main battery. The secondary-side terminal pair of the conversion circuit are connectable in parallel to a low-voltage load.