Conext XW PRO 6848 6,800W 48V Installation

Further details about AC Coupling can be found in the document AC Coupling of
Inverters Solutions Guide (976-0240-01-01) available at http://solar.schneider-
electric.com.
Multi-unit Operation
Important: An external transfer switch may be required to protect the internal relays from
the combined loads of the system. For more information, see the Conext XW Pro Multi-
unit Power System Design Guide (document number 990-91373).
Up to three Conext XW Pro units can be installed together in a split phase configuration
with the Conext XW Pro PDP (Power Distribution Panel). The PDP is an ideal optional
companion for managing AC connections and integrating a battery bank and other DC
connections.
Multiple Conext XW Pro units and other Xanbus devices with common connections to
battery banks, PV arrays, the utility grid or a generator require programming during
commissioning to enable correct operation.
Inverting
For multiple units, the master Conext XW Pro synchronizes operation of other connected
units using the same Xanbus network. When AC loads are present, all units produce
power. Refer to the Conext XW Pro Multi-unit Power System Design Guide (document
number 990-91373) for total system surge ratings.
Parallel Charging
Multiple Conext XW Pro units on the same Xanbus network synchronize their charging
stages to help provide efficient charging of the battery bank. When a single unit
transitions from bulk to absorption, so do all other units. In absorption, all units must
complete the absorption stage before any of them transition to the next stage. Note that
units stop sharing charge current just before completing the bulk stage and only share
charging load during the bulk stage.
Each Conext XW Pro unit provides a maximum charging current set by the Max Charge
Rate setting. The maximum current may be decreased, subject to the internal operating
temperature.
When one or more Conext Solar Charge Controllers are installed and operating in the
system, Conext XW Pro units synchronize only their bulk charging stage with the charge
controllers.
Note: Equalization is device specific. Only the device(s) on which equalization was initiated
will perform the equalization. Other devices will stay in float or no-float depending on their
settings.
AC Transfer
Multiple Conext XW Pro units monitor each other to determine the quality of AC input. If
AC input is deemed to be bad by any of the paralleled units, no transfer to AC Out occurs
and the AC LED continues to flash on each unit’s information panel until the AC is
Introduction Conext XW Pro Owner's Guide
990-91227A-01 This document is intended for use by qualified personnel 29