Hello,
[actual gear: 3xMultiplus5000VA, MPPTRS450/200, MPPT250/100, MPPT150/45, 100kWh LiFePo4, full HA monitoring and control]
I am monitoring my 16 LFP cells with a JK BMS and Home Assistant (see attached graphs). I noticed that when the charging current is lower, the cell deviations are proportionally smaller.
Currently, when the charger reaches the absorption voltage, it still provides full current until the BatterySafe algorithm starts to slow down. This sometimes causes noticeable cell deviation.
My idea: would it be possible to configure two absorption thresholds (both user defined)? For example:
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At the first threshold (just below the set absorption voltage), the Victron charger would already reduce charging current significantly.
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At the second threshold (final absorption voltage), it would switch to the normal absorption phase.
This way, balancing would be gentler and deviations smaller.
I already know about BatterySafe and Adaptive charging, but they seem to act only near the absorption setpoint. Is there any supported way to implement such a staged current reduction? Maybe via DVCC, external control (Venus OS / Modbus / MQTT), or a planned feature?
Below: HA JK BMS 16cells monitoring, with abs=55.2V, Float =53.5V. Balancers=3.45V :
Thanks in advance for any advice or best practices!