If the “Time remaining” indicates three dashes: “---” this means that the SmartShunt is in an unsynchronised state. This occurs
when the SmartShunt has just been installed or after the SmartShunt has been left unpowered and is powered up again. For
more information, see paragraph 5.3: “Synchronising the SmartShunt”.
Input
This is the state of the Aux input. Depending on how the Aux port has been set up, you will see one of these options:
•
Starter battery voltage
: This shows the voltage of a second battery.
•
Battery temperature
: This shows the battery temperature of the main battery when the optional temperature sensor is used.
•
Midpoint voltage deviation
: This shows the deviation in a percentage of the main voltage of the battery bank top section
compared to the voltage of the bottom section. For more information on this feature see chapter 9: “Midpoint voltage
monitoring”.
5.3. Synchronising the SmartShunt
For a reliable readout, the state of charge, as displayed by the SmartShunt, must self-synchronise regularly with the true state of
charge of the battery. This to prevent drift of the “State of charge” value over time. A synchronisation will reset the state of charge
of the battery to 100%.
5.3.1. Automatic synchronisation
Synchronisation is an automatic process and will occur when the battery has been fully charged. The SmartShunt will look at a
few parameters to ascertain that the battery has been fully charged. It will consider the battery to be fully charged when the
voltage has reached a certain value and the current has dropped below a certain value for a certain amount of time.
These parameters are called:
• Charged voltage - the float voltage of battery charger.
• Tail current - a percentage of the battery capacity.
• Charged detection time - the time in minutes.
As soon as these 3 parameters have been met, the SmartShunt will set the state of charge value to 100%, thus synchronising the
state of charge.
Example:
In case of a 12V battery, the SmartShunt will reset the battery’s state of charge to 100% when all these parameters have been
met:
• The voltage exceeds 13.2V,
• the charge current is less than 4.0% of the total battery capacity (e.g. 8A for a 200Ah battery) and,
• 3 minutes have passed while both the voltage and current conditions are met.
If the SmartShunt does not perform a regular synchronisation, the state of charge value will start to drift over time. This is due to
the small inaccuracies of the SmartShunt and because of the estimation of the Peukert exponent. Once a battery has been fully
charged, and the charger has gone to float stage, the battery is full and the SmartShunt will automatically synchronise by setting
the state of charge value to 100%.
5.3.2. Manual synchronisation
The SmartShunt can be synchronised manually if required. This can be achieved by pressing the synchronise button in the
VictronConnect battery settings.
A manual synchronisation can be needed in situations when the SmartShunt does not synchronise automatically. This is for
example needed on first install or after the voltage supply to the SmartShunt has been interrupted.
A manual synchronisation can also be needed when the battery has not been fully charged, or if the SmartShunt has not detected
that the battery has been fully charged because the charged voltage, current or time have been set incorrectly. In this case review
the settings and make sure the battery regularly receives a full charge.
Manual - SmartShunt
Page 13
Operation
