RS485... RS485 is also the common interface for daisy-chained multi-pack systems where each pack reports up to a controller ... who answers "CAN, RS485, and Bluetooth" has not answered the protocol question.
This guide covers how connects to IoT infrastructure as an RS485BMS, CAN bus BMS, and Bluetooth-enabled device, and how to integrate BMS data into SCADA and energy management platforms via standard RS485 BMS communication protocols.