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3.0 Setup
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• SETUP: 09 Final Charge – The Final Charge stage setting is the stage
to which the charger will transition after the absorption stage has fi nished—
as set in the 03 Absorb Time menu .
Default setting: Final = Multi
Selections: Multi, Float, Silent (Rebulk)
Note: If “CC/CV Controlled” (or “LFP Controlled”) displays on this menu’s
screen, you will not be able to adjust the settings because either “CC/CV” (or
“LFP”) has been selected as the battery type from the 04 Battery Type menu.
This lock-out screen prevents access to settings that may cause a charging
con fl ict while in the CC/CV (or LFP) battery charge pro fi le.
◊ Set Final Charge = Multi – The Multi setting (which is short for “Multi-
Stage”), transitions from the Absorption stage to Float. After being in the
Float stage for 4 hours with no DC load on the batteries, the charger enters
the Full Charge stage (i.e., Battery Saver mode). In Full Charge mode, the
charger automatically stops charging but is still on and actively monitoring the
battery voltage. The charger remains in the Full Charge stage until the battery
voltage drops below 12.7 VDC (for 12-volt batteries), 25.4 VDC (for 24-volt
batteries), or 50.8 VDC (for 48-volt batteries)—at which time it returns to the
Float stage. The charger continues to cycle between Float and Full Charge as
long as incoming AC is available. See Figure 3-19.
Why would I use Multi-Stage? Multi 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 mode will use
the inverter/charger to complete a full charge. When the charger transitions
to Full Charge, 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
helps reduce water consumption in fl ooded batteries when they are left in
the charge mode for extended periods, like in a backup power application.
Bulk Charge
Absorb Charge
Float
Charge
Full
Charge
Voltage
Current
Max Charge
Amps
CU
R
R
E
N
T
&
V
O
LT
A
G
E
TIME
Absorb
Volts
Float
Volts
Absorb Done
(= Time, Amps
or SOC)
First Stage Second Stage
Final Stage
4 Hours
ReFloat Volts
(restarts Float
Charge for 4
hours, then
back to Full
Charge)
Figure 3-19, Final Charge Stage - Multi-Stage