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2–30 975-0012-01-02 Rev A
Series Stacking (120 Vac/60 Hz Models only)
This COM port allows two DR Inverters (120 Vac/60 Hz models only) to be used
in the same system in a “SERIES” configuration to operate 240 Vac loads. Series
stacking can also be used to connect to 240 Vac only power systems providing
both 120 and 240 Vac outputs. A series stacking interface cable (DRI) is required
to connect the series stacking port of the inverters.
In this mode, one of the inverters will function as the “primary” and the other
inverter becomes the “secondary.” The first unit switched ON becomes the
primary and ensures the secondary’s output is 180 degrees out of phase for
240 Vac operation. Both units can charge the batteries or provide battery backup
power during a utility outage.
The following illustrations provide a general overview of AC configurations using
stacked inverters. Detailed wiring and operating instructions are provided with the
DRI interface kit available from Xantrex Technology Inc.
The following diagrams illustrate the AC Wiring for a basic On-Grid and Off-Grid
application.