DATA PROCESSING SYSTEM, CONNECTION BOX, AND DATA PROCESSING METHOD

A data processing system includes storage assemblies each including a controller configured or programmed to control charge-discharge of energy storage devices, and a data processor, in which the storage assemblies are provided at different places, each of the storage assemblies is configured to store the energy storage devices, the data processor includes a memory to store state data of the energy storage devices, and a processor configured or programmed to update the state data stored in the memory by using a state data of the energy storage devices received from the controller, and the processor is configured or programmed to derive a quality evaluation of each of the energy storage devices based on the state data stored in the memory, and output the derived quality evaluation to the controller or another device.