© 2010 Magnum Energy, Inc.
36
3.0 Setup
Info:
The Full Charge stage will help reduce water consumption in
fl
ooded batteries during long charge cycles. If another charge source
such as PV or wind is charging the batteries above the fully charged
voltage, the charger will remain in the Full Charge mode.
Why should I use the Multi-Stage?
Multi-Stage is the most commonly used
charge mode. It is suitable for most applications and will assure a full charge
to the batteries, without overcharging. If there is another alternate charge
source charging the batteries such as PV, wind or hydro, then Multi-Stage mode
will use the inverter/charger to complete a full charge. The inverter/charger
will transition to Full Charge mode and the alternate charge source will then
maintain the battery voltage. If the alternate source is unable to maintain
the voltage, the charger will enter Float mode for another four hour period.
The Full Charge feature in the Multi-Stage mode also helps reduce water
consumption in
fl
ooded batteries when they are left in the Charge mode for
extended periods, such as in a backup power application.
Set Final Charge Stage = Float
-
The Float stage is a maintenance
charge mode that maintains a constant voltage – while delivering up to
the maximum rated current of the charger in order to power any DC loads
connected to the batteries. Most 3-stage chargers
fi
nish the Charge mode
in Float and remain in Float as long as an AC source is available on the
input of the charger. The
fl
oat voltage is determined by the battery type
selected in the
03B Battery Type
menu item. Unlike Multi-Stage mode,
in Float mode there is no Full Charge mode.
Why should I use the Float mode?
Float mode is typically used when the
charger is the only charge source connected to the batteries. This mode will
maintain the batteries at the
fl
oat voltage. If using
fl
ooded batteries and the
charger is in
fl
oat for an extended period, the water level should be checked
every two to three weeks for proper levels.
Set Final Charge Stage = Silent
-
Silent mode stops charging once it
transitions from Absorb mode to “
Silent
”. As the charger enters Silent
mode it monitors the battery voltage and starts charging once the
batteries fall to the
DC Volts to Rebulk
setting. Once the batteries reach
this setting, the charger restarts the charge cycle in Bulk mode and then
transitions to Absorb. After the Absorb cycle, the charger again transitions
to Silent mode and continues this cycle.
Set DC Volts to ReBulk -
When
Silent
mode is selected, you must also
set the DC voltage set-point where the charger restarts the Bulk mode.
This setting should be the lowest DC volts to which you will allow the
batteries to fall before starting a new Bulk cycle. Typically, the lowest
DC volts the batteries are allowed to fall is 12.0 to 12.2VDC, (12-volt
systems) 24.0 to 24.4VDC (24-volt systems), and 48.0 to 48.8VDC (48-
volt systems) respectively.
Default setting
-
Set DC Volts to ReBulk = 12.0, 24.0, 48.0 VDC
Why should I use the Silent mode?
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-Stage
mode and Silent is that 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.