Hello I have removed by batters from my set up but victron app is still showing battery voltage any reason why
It’s displaying its own output voltage, since it no longer has a reference.
As a secondary note, do not remove the battery before the PV - this is called out in the manual. Disconnect PV, then battery; when connecting, connect battery and then PV.
In the settings menue you can turn the charger off, no need to disconnect wires.