Smart BMS 12 200 not charging enough

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As explained above, your alternator voltage looks too low. Covered in this FAQ. Check your connections with a multimeter for voltage drop, vehicles and boats suffer vibration and connection corrosion at times. This includes the negative return path.

Smart BMS 12/200 or BMS CL12/100 alternator charge current is much lower than the fuse value

This topic is for a low alternator charge current (e.g. 100 Amp fuse installed and only charging at 50 Amps not 90 Amps) on the Smart BMS 12/200 or BMS CL12/100 or older alternator current limiting BMS versions. The BMS has a fuse, which will have a known resistance being used as a shunt to generate a voltage drop to measure the alternator current. They also then limit the current to a maximum of approximately 90% of the fuse value. The first check is that you are using a Victron branded Mega …