Hello. I wonder if I am thinking this right... I am trying to end the absorption phase solely based on the tail current, but it seems system is ignoring that.
Scenario is: Charging LiFEPO4 bank with 8 cells (25.6V) with integrated BMS just for protection (no communication with Victron)
- Multiplus 24/ 3000
- 3x MPPT in parallel charging
- Venus GX
Customised charge profile:
- Absorption voltage: 27.6 V (I can monitor cells, and no cell is above 3.6V)
- Absorption time: Fixed, 1hour 30 minutes
- Tail current: 9 amps, battery capacity is ~180Ah
- Float voltage: 27.1 V
It ignored the tail current and the absorption time was exactly 1,5 hours. I would like to stop absorption when current decreases past 9A.
I didn't feel adaptive time was ok for lifepo4, as if bulk takes longer, absorption may not need so much time. I would like to make the criteria to stop Abs be solely the Tail Current (system!, not individually each MPPT)
How can I do this?