Product Manual

Configuration via SCP
4–16 975-0638-01-01 Rev E
Absorption Stage Absorption charge is the second stage of battery charging and provides the
batteries with a controlled, constant voltage. During this stage, the current drawn
by the batteries slowly decreases. When this current falls below 2% of the battery
capacity, or when the configurable Absorb Time expires, the charger switches to
the Float or NoFloat stage, depending on the selected charge cycle.
Float Stage Float charge maintains a trickle charge on the batteries whenever AC is present
on the Conext SW input. Float charging reduces battery gassing, minimizes
watering requirements (for flooded batteries), and makes sure the batteries are in
a constant state of readiness. When three-stage charging is selected, the
charger automatically switches to the float stage after the batteries have received
a bulk and absorption charge. The batteries will be maintained at the default float
voltage level for the selected battery type or the voltage selected under Float
Voltage on the custom battery Settings menu.
Custom 28.8V (changeable) 57.6V (changeable)
LithiumIon 29.0V (changeable) 58.0V (changeable)
Tabl e 4-7 Preset Bulk Voltage Settings for Different Battery Types
Battery Type
24-Volt Models
Preset Bulk Voltage
48-Volt Model
Preset Bulk Voltage
NOTE: If there are DC loads on the batteries, the charger’s current may never
decrease to a level to initiate the next stage of charging. In this case, the
charger would stay in absorption until the Absorb Time setting is reached.
To make sure the charger does not remain in absorption for too long, adjust
Absorb Time on the Charger Settings menu. The timer begins at the start of the
absorption stage and terminates absorption charging if the charge current does
not decrease to below 2% of the battery capacity before the Absorb Time
setting expires. The Absorb Time setting may be increased if the charge cycle
continually runs the full Absorb Time in the absence of DC loads. This is an
indication of too large a battery bank for the selected Absorb Time setting.
Also, the Absorption Time setting resets to its default value of 180 minutes when
the Battery Type is changed.
Tabl e 4-8 Preset Absorption Voltage Settings for Different Battery Types
Battery Type
24-Volt Models
Preset Absorption Voltage
48-Volt Model
Preset Absorption Voltage
Flooded 28.8V 57.6V
Gel 28.4V 56.8V
AGM 28.6V 57.2V
Custom 28.8V (changeable) 57.6V (changeable)
LithiumIon 29.0V (changeable) 58.0V (changeable)
ConextSW-NA-OwnersGuide.book Page 16 Thursday, July 23, 2015 3:26 PM