© 2001 Xantrex Technology Inc. All Rights Reserved.
P/N 975-0013-01-01 Rev B 10/01
7
2.0 INSTALLATION
Series Stacking
The STACKING port allows two SW or PS Series inverter/chargers 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 (SWI) is required to connect the series
stacking port of the inverters. In this mode, the inverters act independently of each other; however, their output is
phase locked and synchronized 180 degrees out-of-phase. Both units can independently charge the batteries or
provide battery backup power during a utility outage. 230 VAC/50 Hz units can not be stacked.
NOTE: Use tape to label the inverters as INVERTER 1 (L1) and INVERTER 2 (L2), for future
reference.
Figure 2-1
PS Series DC Interconnect Cables and SWI Series Stacking Cable
POSITIVE (+) RED TERMINAL
NEGATIVE (-) BLACK TERMINAL
NEGATIVE (-) BLACK TERMINAL
POSITIVE (+) RED
INTERCONNECT CABLE
(not used in installations
with dual disconnects)
NEGATIVE (-) BLACK
INTERCONNECT CABLE
POSITIVE (+) RED TERMINAL
INVERTER 1 (L1)
INVERTER 2 (L2)
SWI SERIES STACKING
INTERFACE CABLE
PS STACKING PORT
PS STACKING PORT
