The way I read this, batteries with BMSs that do not communicate are now obsolete:
If a shutdown condition is approaching a battery system should notify the operator with a visual and/or audible alarm before disconnecting the battery from the DC system.ABYC E13-7
I think ABYC should have required all BMS to be able to communicate with charging sources. This could be as simple as a set of contacts, but CANBus is better. More here on why. And here on ways to do that.