Victron MP2 + JK-PB2A16S20P -> toggling between charing/discharging

[stefanengelbertz]

Hi all, everyone,
The initial situation is based on a Victron Multiplus 2, JK-PB2A16S20P and VM-3P75CT (smart meter). The regulation is zero power feed (-20W).
I now have the problem that when the battery is almost fully charged, it switches relatively frequently between charging and discharging mode. Unfortunately, I can't currently explain why the control behaves like this. I have made a video about this, maybe someone has an idea.

Video:
battery_video.webm

Logging charging behavior (resolution only 60s):

Firmware versions:
dbus-serialbattery: v1.6.2025.0131
JK: V15.32
Victron MP2: v3.51

dbus-serialbattery config.ini

MAX_BATTERY_CHARGE_CURRENT = 150.0
MAX_BATTERY_DISCHARGE_CURRENT = 150.0

VOLTAGE_DROP = 0.33

#only temporary
GUI_PARAMETERS_SHOW_ADDITIONAL_INFO = True
CVCM_ENABLE = True

LOGGING = DEBUG

[mr-manuel]

Totally normal behavior. There are lots of threads in the repo of louisvdw or Victron community.