DC POWER SUPPLY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a DC power supply system capable of making effective use of a storage battery for backup relative to a DC load during a power failure while highly maintaining reliability of the backup.SOLUTION: A DC power supply 12 is configured to supply electric power to a DC load 14 by discharge of a storage battery 13 by lowering an output voltage more than an output voltage for float-charging the storage battery 13 at a predetermined time zone and to perform recovery charge for the storage battery 13 by recovering the output voltage lowered after the predetermined time zone elapses to an output voltage for float charging of the storage battery 13.