The Redflow ZBM2 battery is a 48V 10kWh DC Zinc-Bromide hybrid flow battery that is installed in parallel-wired DC clusters. It is the worlds smallest commercial flow battery. It uses the Redflow CANbus BMS as the control and communications interface for the battery system.
An overview of the technical specifications of this battery are provided here: https://faq.zcell.com/content/1/11/en-us/what-are-the-technical-specifications-of-a-zcell-battery.html
Important information about installing and configuring ZBM2 systems with Victron Energy products is provided here: https://faq.zcell.com/category/10/victron-energy-interfacing.html
The Redflow ZCell BMS supports the same CAN-bus protocol connection to the Color Control GX that is used with many Lithium Battery BMS systems.
The best way to interface from a Redflow battery system to the CCGX is to use a canbus connection on the ZCell BMS and to follow the Color Control GX canbus interface procedure as for any other CAN-bus BMS based battery.
The Distributed Voltage and Current Control (DVCC) feature provides excellent outcomes and provides very tightly integrated operation and control. The use of DVCC is normal (and highly recommended) for all new ZCell/ZBM2 installations.
A deprecated MODBUS-TCP interfacing approach is on the ZCell website. This can update the SOC on the Color Control GX using MODBUS-TCP over ethernet instead of using CAN-bus as the interface mechanism. For installations that are not using DVCC, you should limit the maximum charging voltage for all charging elements in the system to 56V.
This page on the ZCell web site explains how to interface and configure a system to use ESS (if needed) and to activate DVCC: