5
0
Stacking Features
This guide for use by qualified personnel only.
Stacking Cable
For series stacking (120
DQG
volts), connect the
s
tacking cable between the two
STACKING
ports.
Series Stacking Operation
The inverter is designed to accept power input from a single-
phase, three-wire 120/240-volt AC system with 120 volts to
each inverter. The input line (
INPUT L
or
L1
) terminal of
each inverter accepts one leg of 120 volts each and the input
neutral (
INPUT N
) terminals of both inverters are tied
together and connected to the power source neutral leg.
Any AC load being powered while AC input is present to the
inverters will be in addition to the power being drawn for
charging the batteries. Each unit in the stack can provide a full
pass-through current of 30 amps for 120-volt systems.
When AC input power is lost, both units in the stack switch
from charger to inverter mode. Once this switch is made, 120
volts AC is available from each individual inverter or 240
volts AC is available across the output line (
OUTPUT L
or
L1
) terminals of the stacked pair.
Stacked inverters will typically support about twice the surge
power of one standalone unit. For example, a
Q$XWR3RZHU
30
stacked pair will surge about 12000 watts.
Figure 19
Stacking Cable for Series Stacking
To order the stacking cable, call customer service
CLEAR FAULT
RESET
INVERTER
ENABLED
Inverter
On
AC/
Charge
Fault
STACKING
K
ANBUS INTERFACE
CLEAR FAULT
RESET
INVERTER
ENABLED
Inverter
On
AC/
Charge
Fault
STACKING
K
ANBUS INTERFACE
Two
Auto Power 3000
units shown.
Summary of Contents for 091-269-12-2000
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