8.0 Using a BMK
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When the Sense Module is
fi
rst connected, the batteries will need to be fully
charged (i.e.,
Batt
SOC = 100%
) at least once to establish a SOC reference
point. While this reference point is being calculated, the display will show
“
Think’n
”, to indicate that the SOC reference point is being calculated. After
the batteries are fully charged, the display will change from
Think’n
to
100%
and begin to provide accurate SOC percentage values.
Info:
Think’n
can take up to several days depending on the charge
source and its ability to completely recharge the batteries (e.g., a
small PV array may not be large enough to replace all the AHrs in
a reasonable amount of time).
If the Sense Module is disconnected from power, this display resets to
Think’n
and the batteries will require another full charge before this display begins
providing SOC percentage information.
Info:
If using lead-acid type batteries, try to limit battery discharging
to 50% of capacity (keep battery above 50% SOC). If batteries are
allowed to be continually discharged below 50% SOC, their effective
service life will be considerably shorter. This 50% rule has been
determined to be the best compromise between available energy
and the maximum number of discharge cycles a battery can provide.
03 BM: Meters
– This menu shows the battery bank’s DC voltage, DC
current, and AH information that has been provided by the battery meter.
The values for these meter displays are updated each second.
• DC
Volts
– Displays the real-time battery voltage from 7.00 to 70.00
volts (± 0.02 volts).
• DC
Amps
– Displays the real-time charge current (amps into the
battery) or discharge current (amps out of the battery). Charging is shown
as a positive (+) number and discharging is shown as a negative (-) number.
The range is from ±0.1 to 999 amps, with a 1.0% accuracy.
• AH
I/O
(
Amp-Hours In/Out
) – Displays the AHrs returned to/
removed from the battery. When the value is positive, it represents AHrs
returned to the battery during any subsequent charging. A negative value
represents AHrs removed from a full battery. The range is ±32,768 AH.
When using the charge ef
fi
ciency’s
Auto
setting, the AH I/O value is
recalculated after the battery has been fully charged (i.e., 100% SOC) and
≥
0.5% of the battery capacity has been discharged. If the Sense Module is
disconnected from power, the
AH I/O
value resets to zero.
Info:
The
AH I/O
display correlates with the battery’s
Batt
Amphr
setting to help determine the
02 BM: SOC
display.
Info:
AH I/O example: if you run a 10-amp load for three hours,
the display will show
-30 AH
. When you begin charging, the display
will count from
-30 AH
back toward
0 AH
.
• rAH Out (Resettable AHrs Removed)
– This meter displays
the total AHrs removed from the battery since it was last reset. This
display can be used as a battery load indicator to help identify and
monitor the battery load consumption. The range is 0 to 65,535.0
AHrs (0.1 amp-hour resolution).
To reset the AHrs value to zero, press and hold the rotary SELECT knob for
>5 seconds when this display is shown. After this display has been reset,
it will begin calculating and displaying new rAH Out values. This display
automatically resets to zero if the Sense Module is disconnected from power.
