Good catch !
I’m using this option a lot in my latest Node Red flow but hadn’t noticed this yet.
For those who wonder: you can set the DVCC CVL in the GUI (v1 and v2) and in GUIv1 it will show you the value you entered (eg 55.2V).
Under the hood though, the system rounds this value and works with the rounded value (55V in this case).
In GUIv2 it will show the rounded value that’s being used by the system.
If you set the DVCC_CVL value from somewhere else (eg Node Red), the rounding does not occur.