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10.3.2 Incomplete current reading
The negatives of all the loads and the charge sources in the system must be connected to the load minus side of
the SmartShunt. If the negative of loads or charge sources are connected directly to the negative battery terminal
the currents to these loads or charger sources will not flow through the SmartShunt and they will be excluded
from the current reading and therefore also from the state of charge reading. The SmartShunt will display a
higher state of charge than the actual state of charge of the battery.
DC
loads
and
chargers
10.3.3 There is a current reading while no current flows
Perform a zero current calibration while all loads are turned off (paragraph 7.1.13) or set the current threshold
(paragraph 7.1.8).
10.3.4 Incorrect state of charge reading
Incorrect state of charge due to a synchronisation issue
State of charge is a calculated value and will need to be reset (synchronised) every now and then. The following
parameters will have an effect on the state of charge calculations if they have been set up incorrectly:
•
Battery capacity
•
Charged voltage and tail current
Peukert exponent and charge efficiency factor
•
State of charge and synchronisation settings
•
For more information on these parameters see paragraph 7.1: "Battery settings".
Also see next paragraph Error! Reference source not found.: "Error! Reference source not found.".
Incorrect state of charge due to incorrect current reading
State of charge is calculated by looking at how much current flows in and out of the battery. If the current reading
is incorrect, the state of charge will also be incorrect. See paragraph Error! Reference source not found.:
"Error! Reference source not found.".
10.3.5 State of charge indicates three dashes "---"
This means that the SmartShunt is in an unsynchronised state. This mainly occurs when the SmartShunt has
just been installed or after the SmartShunt has been unpowered and is being powered up again. Charge the
batteries and the SmartShunt should synchronise automatically. If that doesn't work, review the synchronisation
settings, See paragraph 5.3: "Synchronising the SmartShunt".
If you know the battery is fully charged but don't want to wait until the SmartShunt synchronises, then press the
Synchronise SoC to 100% button, see paragraph 7.1.12: "Synchronise SoC to 100%".
10.3.6 State of charge does not reach 100%
The SmartShunt will synchronise and reset the state of charge to 100% as soon as the battery has been fully
charged. Fully charge the battery and check if the SmartShunt correctly detects if the battery is fully charged. If
the SmartShunt does not detect that the battery has been fully charged you wil need to check or adjust the
34
DC
loads
WRONG
and
chargers
DC
loads
and
chargers
RIGHT
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