7.2.2. Charged voltage
The battery voltage must be above this voltage level to consider the battery as fully charged. As soon as the battery monitor
detects that the voltage of the battery has reached this “charged voltage” parameter and the current has dropped below the “tail
current
[29]” parameter for a certain amount of time, the battery monitor will set the state of charge to 100%.
Setting Default Range Step size
Charged voltage (setting 02)
13.2V (12V nominal)
26.4V (24V nominal)
52.8V (48V nominal)
0 - 70V 0.1V
The “charged voltage” parameter should be set to 0.2V or 0.3V below the float voltage of the charger.
The table below indicates the recommended settings for lead acid batteries.
Nominal battery voltage Charged voltage setting
12V 13.2V
24V 26.4V
36V 39.6V
48V 52.8V
7.2.3. Discharge floor
The “Discharge floor” parameter is used in the "time remaining" calculation. The battery monitor calculates the time it takes until
the set “discharge floor
[29]” has been reached. It is also used to set the state of charge alarm defaults.
For lead-acid batteries set this to 50% and for lithium set it lower.
Note that this setting only appears when accessing the battery monitor via the VictronConnect app. In case the battery monitor is
accessed via the head unit, see the Low State of Charge (SoC) relay [32] setting instead.
Setting Default setting Range Step size
Discharge floor 50% 0 - 99% 1%
7.2.4. Tail current
The battery is considered as fully charged once the charge current has dropped to less than this “T
ail current” parameter. The
“Tail current” parameter is expressed as a percentage of the battery capacity.
Note that some battery chargers stop charging when the current drops below a set threshold. In these cases, the tail current must
be set higher than this threshold.
As soon as the battery monitor detects that the voltage of the battery has reached the set “Charged voltage [29]” parameter and
the current has dropped below this “Tail current” parameter for a certain amount of time, the battery monitor will set the state of
charge to 100%.
Setting Default Range Step size
Tail current (setting 03) 4.00% 0.50 - 10.00% 0.1%
7.2.5. Charged detection time
This is the time the “Charged voltage
[29]” parameter and the “Tail current [29]” parameter must be met in order to consider the
battery fully charged.
Setting Default setting Range Step size
Charged detection time (setting 04) 3 minutes 0 - 100 minutes 1 minute
7.2.6. Peukert exponent
Set the Peukert exponent parameter according to the battery specification sheet. If the Peukert exponent is unknown, set it at
1.25 for lead-acid batteries and set it at 1.05 for lithium batteries. A value of 1.00 disables the Peukert compensation. The Peukert
value for lead-acid batteries can be calculated. For more information on the Peukert calculation, the Peukert exponent and how
this relates to the battery capacity
, see the Battery capacity and Peukert exponent [44] chapter.
Manual - BMV-712 Smart
Page 29 All features and settings
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