Device, program, method and system for power control

PROBLEM TO BE SOLVED: To improve reliability.SOLUTION: A power control device which controls the charge and discharge of a storage battery includes: a use power prediction unit which calculates the prediction value of use electric energy in a predetermined time section in a supply power source which supplies power to the power control device and another power control device; and a power control unit which controls, using the prediction value of a first section calculated by the use power prediction unit and information related to the prediction value of the first section, which is acquired in a second section earlier than the first section, whether or not to permit charging the storage battery in the first section.SELECTED DRAWING: Figure 1