I have a system consisting of Multiplus-II, MPPT 150-70 and CCGX connected to a LiFePO4 battery that has an integrated BMS. The system is working well, except that the BMS does not accurately measure the battery SOC. I think the problem is that it does not properly measure low-value discharge currents - so the displayed SOC is generally higher than the actual SOC.
The BMS is built into the battery and all other functions (cell-balancing, voltage display, low/high voltage disconnect etc.) are working well.
Is it possible to add a BMV-712 to the system to replace the BMS SOC value, without loosing the other BMS info (e.g. battery temperature, warnings etc.)? I would like to use the BMV-712 SOC value to control the "Minimum SOC (unless grid fails)" function in ESS.