STORAGE APPARATUS, POWER SUPPLYING METHOD, AND PROGRAM

Provided is a storage apparatus in which of power stored by a battery, surplus power can be effectively used for a monitoring device in normal operation. A storage apparatus includes a power assist controller that monitors the load of a monitoring device selected as a power assist target device. The power assist controller has: a monitoring unit that monitors the load of the monitoring device; and an assist unit that assists the monitoring device by supplying surplus power to the monitoring device until the load becomes a load threshold value or less when the surplus power remains in a battery and the load exceeds the load threshold value.