Abstract: A system according to an embodiment includes storage battery modules, each comprising an assembled battery, a first wireless communication module to transmit and receive radio waves based on a BLE standard, and a battery monitoring unit configured to control operation of the first wireless communication module; and a battery management unit comprising second wireless communication modules to transmit and receive radio waves based on the BLE standard and an arithmetic processing device, wherein a first identifier is preset in the first wireless communication module, and when a connection is started, the first wireless communication module in which a value of a second identifier included in an advertising packet transmitted from the second wireless communication module is a value of the first identifier becomes a broadcaster and transmits the advertising packet.

Abstract: According to one embodiment, a storage battery apparatus includes: a plurality of storage battery modules each including a battery module, which includes a plurality of battery cells, and a cell monitoring unit measuring voltages of the battery cells and a temperature of the battery module; and a battery management unit periodically receiving measurement values of the voltages of the battery cells and the temperature of the battery module. When there is interference in communication with the plurality of cell monitoring units, the battery management unit extends a communication cycle with the cell monitoring units, sets a value of a chargeable current and a value of a dischargeable current of the battery module, which correspond to at least the communication cycle.