Conext XW PRO 6848 6,800W 48V Installation

n The last Conext XW Pro ready to exit absorption triggers the rest to exit absorption
and exit charge. The Conext XW Pro will not wait for any connected Conext MPPT
solar charge controllers to transition to absorption or float.
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 Termination
Voltage, the charger switches to the absorption stage.
Absorption Stage
During the absorption stage, the Conext XW Pro begins operating in constant voltage
mode and the DC charge current falls gradually as energy is returned to the battery. For
the first 60 minutes of the absorption stage, the Conext XW Pro regulates the battery
voltage at the Bulk/Boost Voltage Set Point setting. The voltage limit used for
the remaining time in this stage is the Absorption Voltage Set Point setting. By
default, the bulk and absorption voltage settings are the same for each battery type. The
voltage limit settings for bulk and absorption can be adjusted independently if the battery
type is set to Custom. The Conext XW Pro transitions to the float stage if either one of
the following two conditions are met:
The charge current allowed by the batteries falls below the exit current threshold, which
is equal to 2% of the programmed battery capacity (for a 500 Ah battery bank, this would
be 10 A), for three minutes.
The Conext XW Pro has been in absorption for the programmed maximum absorption
time limit. The default is 3 hours, but the time limit is programmable from 1 minute to 8
hours. The timer begins when the battery voltage is above the Bulk Termination
Voltage for three minutes.
NOTE: If there are DC loads on the batteries, the charger’s current may not decrease to a
level to transition to the next stage of charging. In this case, the charger stays in
absorption until the Absorption Time setting is reached.
To avoid having the charger remain in absorption for too long, adjust Absorption 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 per
cent of the battery capacity before the Absorption Time setting expires. The
Absorption Time setting may be increased if the charge cycle continually runs the
complete Absorption Time in the absence of DCloads. This is an indication of too
large a battery bank for the selected Absorption Time setting.
Conext XW Pro Owner's Guide Configuration
66 This document is intended for use by qualified personnel 990-91227A-01