Conext SW4048 4,000W 48V Installation

Configuration via SCP
4–16 975-0638-01-03
Multi-Stage Charging Process
The charging cycle is a multi-stage process. Whenever qualified AC power is
present at the inverter’s input, it passes power through to the connected load and
begins charging the batteries.
Bulk Stage Bulk charge is the first stage in the charging process and provides the batteries
with a controlled, constant current. Once the battery voltage rises to the bulk
voltage threshold, the charger switches to the Absorption stage.
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. The timer
begins when the battery voltage is above the bulk termination voltage for three
minutes.
NOTE: If the AC input fails or drops below the lower VAC limit (as set in AC
Settings), the complete multi-stage charge cycle (Bulk, Absorption, Float/No
Float) restarts once the source AC returns to within tolerance condition. If the
batteries are already nearly full, the charge cycle will take little time to complete.
Table 4-7 Bulk Voltage Settings for Different Battery Types
Battery Type
24-Volt Models (Bulk Voltage) 48-Volt Model (Bulk Voltage)
Termination Preset Bulk Termination Preset Bulk
Flooded 28.4V 28.8V 56.8V 57.6V
Gel 28.0V 28.4V 56.0V 56.8V
AGM 28.2V 28.6V 56.4V 57.2V
Custom 28.8V (changeable) 57.6V (changeable)
LithiumIon 29.0V (changeable) 58.0V (changeable)
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.
Also, the Absorption Time setting resets to its default value of 180 minutes when
the Battery Type is changed.
Table 4-8 Preset Absorption Voltage Settings for Different Battery Types
Battery Type 24-Volt Models 48-Volt Model
Flooded 28.8V 57.6V
Gel 28.4V 56.8V