4.5.3. Set state of charge
In the V
ictronConnect app, see: Settings > Battery > Battery start synchronized.
Via the head unit, see: Setup menu > Setting 70 - Start synchronised.
When set to ON, the battery monitor will consider itself synchronized when powered up, resulting in a state of charge of 100%.
If set to OFF, the battery monitor will consider itself un-synchronized when powered up, resulting in a state of charge that is
unknown until the first actual synchronization.
For VictronConnect only: The initial state of charge value can also be manually set, by default, this is 100%, and can be set to a
dif
ferent value if so desired. See: Settings > Battery > State-of-charge.
4.5.4. Set the auxiliary input function
In the VictronConnect app, see: Settings > Misc > Aux input.
Via the display, see: Settings menu > Setting 69 - Aux input.
This setting sets the function of the auxiliary input, being:
• Starter battery - Voltage monitoring of a second battery.
• Midpoint - Measuring the midpoint of a battery bank.
• Temperature - Measuring battery temperature via an optional temperature sensor.
• None - The auxiliary input is not used.
4.6. Make Lithium settings (if needed)
LiFePO4 (Lithium Iron Phosphate or LFP) is the most used Li-ion battery chemistry. The factory defaults are in general also
applicable to LFP batteries with exception of these settings:
• Tail current.
• Peukert exponent.
• Charge efficiency.
• Discharge floor.
Tail current
In V
ictronConnect see: Settings > Battery > Tail current.
Via the head unit, see: Setup menu > Setting 03 - Tail current.
Some lithium battery chargers stop charging when the current drops below a set threshold. The tail current must be set higher in
this case.
Peukert exponent
In V
ictronConnect see: Settings > Battery > Peukert exponent.
Via the head unit, see: Setup menu > Setting 05 - Peukert exponent.
When subjected to high discharge rates, lithium batteries perform much better than lead-acid batteries. Set the Peukert exponent
at 1.05, unless the battery supplier advises otherwise.
Charge efficiency
In VictronConnect see: Settings > Battery > Charge efficiency factor.
Via the head unit, see: Setup menu > Setting 06 - Charge efficiency factor.
The charge efficiency of lithium batteries is much higher than that of lead-acid batteries. We recommend setting the charge
efficiency at 99%.
Discharge floor
In V
ictronConnect see: Setting > Battery > Discharge floor
Via the head unit, see: Setup menu > Setting 16 - SoC relay.
This setting is used in “the time to go” calculation and is set at 50% by default for lead-acid batteries. However, lithium batteries
usually can be discharged significantly deeper than 50%. The discharge floor can be set to a value between 10 and 20%, unless
the battery supplier advises otherwise.
Manual - BMV-712 Smart
Page 16 Configuration
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