Victron energy VE.Bus BMS Manuel page 9

Figure 9: System example for a boat or vehicle with a 24 V Li-ion system, a 24 V alternator and a 12V starter battery.
To charge the starter battery: use a DC-DC converter or a small battery charger connected to the Multi or Quattro.
Alternators which need DC voltage on the B+ output to start charging can be started by pushing the Start Assist push button
once the engine is running.
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 10: Solar application with an MPPT 75/50 or 100/50 and a Phoenix Inverter 24/1200.
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