thank you for your feedback, so you can confirm the main contactor never open on canbus loss?
I will install a recbms16s next week and your information is really appreciated, i will just add WS500 alternator controller on your setup!
Because i have seen 20000$ damage (autopilot and every 24v smart devices fryed) on sailing boat just because a not smart enough alternator controller, not properly configured for a good talk with bms. it's was mastervolt but same topology, software incompatibility lol.
Damage is from very inductive charger, typically alternator winding, not from high frequency switching charger.
The REC will only open the main contactor if one of it's safety parameters is violated. Those all come from the BMS itself (battery cell voltages, temp sensors and shunt).
It does send out over CANBUS in the CVL, CCL, and DCL targets - for example if the BMS senses the battery is too cold to charge it will set the CCL to 0 so any CANBUS equipment is aware to not try to charge.
You could have a situation where the main contactor gets opened by the REC and it is also telling the equipment via CANBUS to "set charge to 0 amps" which is not a bad thing to happen, if the equipment is still powered with the battery disconnected.
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