Victron energy VE.Bus BMS Manual página 8

Figure 7: System for a boat or vehicle with a MultiPlus-II inverter/charger
Note: the BMS is connected to the battery minus by the UTP cable between the BMS and the inverter/charger.
Therefore, in order to prevent ground loops, do not wire the BMS minus connector.
Figure 8: System example for a boat or vehicle with a three phase inverter/charger configuration (DC fuses not shown,
except for the the Li-ion battery fuse)
Note 1: the AC Detector is installed in the leader only.
Note 2: the BMS is connected to the battery minus by the UTP cable between the BMS and the inverter/charger.
Therefore, in order to prevent ground loops, do not wire the BMS minus connector.
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