CHARGE/DISCHARGE CONTROL SYSTEM

A charge/discharge control system 1 includes a power generating unit 2, an electrical load 3, a plurality of battery modules 4, a first connecting path 5, a first switch 6, and a controller 7. Each of the battery modules includes a battery 41, a second switch 42, and a battery management device 43. A third switch 8 is disposed between each of the battery management devices and the first connecting path. The controller turns on the second switch and the third switch of the (m+1) battery module of which a voltage level is the second lowest when a condition where a level of voltage at the mth battery module during charging, of which a voltage level is the lowest, reaches a level of voltage at the (m+1) battery module is met.