State Of Charge Does Not Increase Fast Enough Or Too Fast When Charging; Incorrect Battery Voltage Reading; Incorrect Auxillary Battery Voltage Reading; Synchronisation Issues - Victron energy SmartShunt IP65 Manual

10.3.8. State of charge does not increase fast enough or too fast when charging

This can happen when the battery monitor thinks the battery is bigger or smaller than in reality. Check if the
has been set correctly.

10.3.9. Incorrect battery voltage reading

Check if there is an issue with the VBatt+ cable. Perhaps the fuse, the cable itself or one of the terminals is faulty or there is a
loose connection.
Check for incorrect wiring: the VBatt+ cable has to be connected to the positive of the battery bank, not midway of the battery
bank.
In case a temperature sensor is used, make sure the sensor is connected to the positive terminal of the battery bank, not in the
middle of the battery bank.

10.3.10. Incorrect auxillary battery voltage reading

If the auxillary (starter) battery voltage is too low:
• Perhaps there is an issue with the Aux cable, perhaps the fuse, the cable itself or one of the terminals is faulty, or there is a
loose connection.
If the auxillary (starter) battery voltage reading is missing:
• Make sure that both batteries share a common negative and that the starter battery negative is connected to the load side of
the battery monitor. For instructions on how to correctly wire the starter battery, see
of a second battery [5].

10.3.11. Synchronisation issues

If the battery monitor does not synchronise automatically, one possibility could be that the battery never reaches a fully charged
state. Fully charge the battery and see if the state of charge eventually indicates 100%.
Another possibility is that the charged voltage setting [21]
increased.
It is also possible that the battery monitor synchronises too early. This can happen in solar systems or in systems that have
fluctuating charge currents. If this is the case change the following settings:
• Increase the "charged voltage
absorption voltage (for a 12V battery).
• Increase the "charged detection time
clouds.
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Manual - SmartShunt IP65
should be lowered and/or the
[21]" to slightly below the absorption charge voltage. For example: 14.2V in case of 14.4V
[22]" and/or decrease the
Aux connection for monitoring the voltage
tail current setting [22]
"tail current [22]" to prevent an early reset due to passing
battery capacity [9]
should be
Troubleshooting