3.0 Setup
35
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◊
Set Final Charge Stage = Silent
–
Silent mode stops charging once
it transitions from Absorb mode to ‘
Silent
’. Once the charger enters Silent
mode the battery voltage is continuously monitored. If the batteries fall to the
Rebulk
value, the charger restarts the Bulk Charge mode and then transitions
to Absorb Charge mode. After the Absorb Charge mode, the charger again
transitions to Silent mode. This silent to rebulk to absorb and back to silent
cycle will continue as long as it is required. See Figure 3-21.
ReBulk
– When
Silent
is selected, you must also set the DC voltage
set-point where the charger restarts the Bulk Charge mode. This setting
should be at the lowest DC volts you want the batteries to fall before starting
a new bulk charge. Typically, the lowest DC volts the batteries are allowed
to fall is 12.0 to 12.2 VDC (12-volt systems), 24.0 to 24.4 VDC (24-volt
systems), and 48.0 to 48.8 VDC (48-volt systems) respectively.
Default setting:
Rebulk = 12.0V (for 12v inverter)
Ranges:
12.0-16.0 VDC (12v), 24.0-32.0 VDC (24v), 48.0-64.0 VDC (48v)
Why would I use the Silent Stage?
Silent mode is typically used when
an alternate charge source is available and able to fully charge or
fi
nish the
charge cycle after the Absorb stage. A major difference between Multi mode
and Silent mode is that the Silent mode returns to Bulk mode instead of Float
mode. In Silent mode you can also adjust the Rebulk set-point in order to
allow the alternate charge source to provide more of the battery charging.
Figure 3-21, Final Charge Stage - Silent Stage
Bulk Charging
Absorb Charging
Silent
Voltage
Current
Max Charge
Amps
Absorb
Volts
CU
R
R
E
N
T
&
V
O
LT
A
G
E
TIME
Absorb Done
(= Time, Amps
or SOC)
First Stage
Second Stage
Final Stage
Rebulk Volts
(restarts Bulk
Charging)