Xantrex Technology power Inverter Stacking - Manual (Page 14)

Introduction
1–2 975-0059-01-01 Rev A
Stacking Inverters
Two identical, series-stacked, inverters can be connected together for the
following purposes.
• The voltage output of a single inverter is insufficient to power the 240 Vac
loads attached to the system;
• Multi-wire branch circuits exists in the current structure. Please see Appendix
F, “Multi-wire Branch Circuit Wiring”, in the Sine Wave Plus Owner’s
Manual for additional information.
Stacking inverters in a “series” configuration can double the output voltage at the
same current level as an individual inverter.
Series-stacking connects the neutral outputs of each inverter together and enables
the inverters to synchronize their hot outputs to be 180 degrees out-of-phase with
each other. This maintains the wattage output at the rated level, but doubles the
voltage output available, thereby allowing 240 Vac loads to be supported by the
system.
Example: Two series-stacked, Sine Wave Plus 4024 Vac inverters can run both
120 Vac and 240 Vac loads at 33 amps continuous output.
Stacking inverters in a series configuration requires the use of the Inverter
Stacking Control-Series (ISC-S) Cable.
Important: Inverter types and models must be identical for stacking
configurations. In other words, you can use two SW Plus 2548 inverters, or two
SW Plus 4048 inverters. You cannot stack a SW Plus 2548 with a SW Plus 4048.
Different types of inverters cannot be intermixed in a stacking configuration.
Models with 230 Vac, 50 Hz, output cannot be series-stacked.