I have a 14s4p battery made up of Nissan Leaf G2 modules and managed with a JK BMS. I also have a Pi running VenusOS and 4 Victron MPPT charge controllers. The battery doesn't have a Victron shunt or BMV; the JK BMS sends the battery voltage, SOC etc. to VenusOS.
The max cell voltage alarm on the BMS is set to 4.15v, and both the absorption and float voltages in each MPPT controller are set to 57.4v (average of 4.1v per cell). On the VenusOS, DVCC is enabled, but BMS control is disabled, so while the BMS provides shared voltage, the individual MPPT controllers control charging.
For the last couple of weeks, my battery has been basically full with only the small system loads (around 10w steady). My issue is that the MPPT controllers are charging the battery to above 58v until the BMS alarms and shuts off charging. At that point, the max cell voltage is at 4.15v while the lowest cell is at 4.14v.
I guess I can drop down the float and absorption voltages to 57.2v, but I'm confused why the MPPT controllers are charging above the set voltages?
