3
GENERAL OPERATION
3.1
Monitoring menu
In normal operating mode the BMV can display the values of selected
important parameters of your DC system. Use the + and - selection
keys to select the desired parameter.
Label
Description
V
Battery voltage: this readout is useful to make a rough estimation of the battery's state-of-charge.
A 12 V battery is considered empty when it cannot maintain a voltage of 10.5 V under load
conditions. Excessive voltage drops for a charged battery when under heavy load can also indicate
that the battery capacity is insufficient.
VS*
Starter battery voltage: this readout is useful to make a rough estimation of the starter battery's
state-of-charge.
I
Current: this represents the actual current flowing in to or out of the battery. A discharge current is
indicated as a negative value (current flowing out of the battery). If for example a DC to AC inverter
draws 5 A from the battery, it will be displayed as –5.0 A.
Consumed Energy: this displays the amount of Ah consumed from the battery. A fully charged
CE
battery sets this readout to 0.0 Ah (synchronised system). If a current of 12 A is drawn from the
battery for a period of 3hours, this readout will show –36.0 Ah.
SOC
State-of-charge: this is the best way to monitor the actual state of the battery. This readout
represents the current amount of energy left in the battery. A fully charged battery will be indicated
by a value of 100.0%. A fully discharged battery will be indicated by a value of 0.0%.
Time-to-go: this is an estimation of how long the battery can support the present load; until it
TTG
needs recharging.
* BMV-602S Only
16
Units
V
V
A
Ah
%
h