Hello Guy (as this will probably target you :-) ),
we run several off-grid BYD B-Box/Victron combos.
Cold weather charge performance required me to switch off DVCC for now ... since we cant
recharge our batts properly if its temperature drops below 13°C.
But i got no good feeling having DVCC off. Especially since the allow to charge/discharge contacts arent wired.
Unfortunatly i got no reponse from BYD so far, as to what firmware changes regarding this topic they might have made for the b-box. U meantioned in your BYD/Victron manual that they did make some changes. Do u have info on that?
overruling the charge limit via a CCGX option would resolve it all ... but guess thats not in victrons interest?