Installation Guide

Key Features
975-0638-01-01 Rev A 1–5
Multiple Unit Configuration
Conext SW Inverter/Charger supports multiple unit configuration to increase
capacity. Conext SW multiple unit configuration is limited to one master unit and
one slave unit.
Parallel Multiple
Unit Configuration
Multiple unit configuration allows two inverter/chargers to operate in parallel
thereby doubling the capacity in inverter mode. The two inverters communicate
over the Xanbus network and intelligently share the load and balance the load
between the units. The Master Conext SW unit synchronizes operation, through
the Xanbus network, between itself and the other unit. When AC loads are
present, the two units produce power, effectively sharing the load. When Search
mode is enabled, only the Master unit produces the AC output.
Multiple Unit
Charging
Two Conext SW Inverter/Chargers synchronize charging stages to ensure
efficient charging of the battery bank. When a one unit transitions from bulk to
absorption so does the other unit. In absorption, the two units must complete the
absorption stage before transitioning to the next stage. Note that the two units do
not load share when charging except during the bulk stage. The Conext SW units
stop sharing charge current just before completing the bulk stage. The units do
not share charge current during the absorption and float stages.
Each unit charges batteries based on the Max Charge Rate setting and active
internal (temperature-based) deratings.
If equalization is enabled on one or more devices capable of equalization
charging, only those devices perform an equalize cycle after absorption. Other
devices transition to float (if three-stage charging is selected) or transition to AC
pass-through (if two-stage charging is selected).
Generator Support
The Conext SW inverter/chargers can operate in tandem with an AC generator to
temporarily assist power loads with large start-up demands such as air
conditioners and water pumps. An Automatic Generator Start device (AGS) must
be installed in the system in order for this feature to work.
When this mode is enabled and generator capacity defined, the inverter will
come on-line and assist the generator when the generator reaches its capacity.
The battery bank must be well charged in order for the inverter to engage this
mode. For more details, see “Gen Support Settings” on page 4–22.
ConextSW-NA-OwnersGuide.book Page 5 Thursday, December 20, 2012 2:00 PM