SYSTEM, PROGRAM, AND METHOD

[Abstract][Solving Means] A system is configured to control a station that is configured to charge and discharge a plurality of movable batteries. The system includes: a classification unit configured to divide the plurality of movable batteries that are connected to the station, into a plurality of groups based on respective charging rates of the plurality of movable batteries; and a control unit configured to control ratios or a number of batteries belonging to each of the plurality of groups in each time window, based on a prediction of use in the station. A method for controlling a station that is configured to charge and discharge a plurality of movable batteries, includes: dividing the plurality of movable batteries that are connected to the plurality of stations , into a plurality of groups based on respective charging rates of the plurality of movable batteries; and controlling ratios or a number of batteries belonging to each of the plurality of groups in each time window, based on a prediction of use in the station.