Setup
Page 40
©
2017 Sensata Technologies
Where should I set my Max Charge Time?
In order to ensure a complete charge cycle is
accomplished, adjust the
Max Charge: Time
setting to a time period that is normally longer than
the settings in the following SETUP menus:
03D Absorb Done Time
,
Absorb Done Amps
, and
Absorb Done SOC
. The
Max Charge: Time
setting has priority over these menus and stops the
charge cycle once that setting is satis
fi
ed.
Example:
The
Max Charge: Time
setting is 6 hours, but the
Absorb Done Time
setting is 8 hours.
After 6 hours in the absorption charge cycle, the charger transitions to the Final Charge stage.
• 03F
Final Charge Stage:
The
Final Charge Stage
setting determines what charge stage(s)
occurs after the absorption charge stage has
fi
nished.
Note:
If “CC/CV Controlled” displays on this menu’s screen, you will not be able to adjust the
settings as “CC/CV” has been selected as the battery type from the 03C Battery Type menu.
Default setting:
Final Charge Stage = Multi-Stage
Range:
Multi-Stage, Float, Silent
◊
Set Final Charge Stage = Multi-Stage
–
The
Multi-Stage
setting transitions from the
Absorption charge stage to Float charge stage. Once in the Float stage for four 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, and 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 3-14.
Note:
These battery voltages are the fully charged voltages of a battery at rest.
Info:
When
Multi-Stage
is selected and the charger goes to Full Charge mode, if another
charge source (such as PV or wind) is charging the batteries above the fully charged
voltage, the charger remains in the Full Charge stage.
Why should I use Multi-Stage?
Multi-Stage
is the most commonly used charge mode. It is
suitable for most applications and assures a full charge to the batteries, without overcharging.
If there is another alternate charge source charging the batteries (PV, wind or hydro), then
Multi-Stage mode uses the inverter/charger to complete a full charge. The inverter/charger
transitions to Full Charge mode, and the alternate charge source then maintains the battery
voltage. If the alternate source is unable to maintain the voltage, the charger enters Float mode
for another 4-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
03C
Battery Type
menu. Unlike Multi-Stage mode, in Float mode there is no
Full Charge
feature.
See Figure 3-15.
Why should I use the Float Charge Stage?
Float mode is typically used when the charger is
the only charge source connected to the batteries. This mode maintains 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.
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