47
Stacking Features
Parallel Stacking
A parallel stacking configuration allows the inverter and
charger capacity of a system to be doubled. Parallel-stacked
inverter/chargers can operate from different battery banks,
meaning each unit is connected to its own battery bank.
However, it is highly recommended to only use a single
battery bank. See “DC Connections for Stacked Inverters” on
page 52.
AC INPUT L2
terminals on both units must not be connected
at all as they are not monitored lines.
AC OUTPUT L1
and
AC OUTPUT L2
must not be
connected together. However, the two output neutrals (
AC
OUTPUT N1
and
AC OUTPUT N2
) can be tied together for
redundancy. This reduces stress on the neutral path internal to
the unit since two circuits will carry the load current.
IMPORTANT:
"VUP1PXFS
models
with
dual
AC
lines
do
not
monitor
voltage
and
current
on
AC INPUT L2
and
AC OUTPUT L2
. If any
L2
line
is
connected,
any
current
flowing
in
this
branch
will
not
be
displayed.
NOTE:
Do
NOT
connect
a
stacking
cable
to
the
STACKING
port
on
the
front
panel
of
Auto Power
to
configure
two
units
for
parallel
stacking.
Figure 17
Parallel Stacking Using Two
Auto Power 3000s
L1
NEUTRAL
GROUND
AC IN
WARNING:
INCORRECT BATTERY
P
O
LA
R
IT
Y
WI
LL C
A
U
S
E
D
A
M
A
GE
T
O
U
N
IT
.
BATTERY
NEGATIVE
BAT
TERY
POS
ITI
VE
AC GROUNDS
(BEHIND COVER)
AC
OUT
AC
IN
30A
AC
IN
PU
T
L
IN
E 1
30A
AC
IN
PU
T
L
IN
E
2
30A
IN
VE
R
T
ER
A
C O
UT
P
U
T
Wiring box cover must be in place during
use to reduce risk of injury to persons
REM
BTS
DC Ground or
Grounding Electrode
Terminal. See
manual for more
information.
N
L1
L2
N1
L1
L2
N2
WARNING:
INCORRECT BATTERY
P
O
L
A
R
IT
Y W
IL
L
C
A
U
S
E D
AM
AG
E
T
O
U
N
IT
.
BATTERY
NEGATIVE
BAT
TERY
POSI
TI
VE
AC GROUNDS
(BEHIND COVER)
AC
OUT
30A
AC
IN
PU
T
L
IN
E 1
30A
A
C
INP
UT
L
IN
E
2
30A
IN
VER
T
E
R
AC
O
U
T
PU
T
Wiring box cover must be in place during
use to reduce risk of injury to persons
REM
BTS
DC Ground or
Grounding Electrode
Terminal. See
manual for more
information.
120 VAC
Loads
Inverter AC
Distribution Panel
NEUTRAL
GROUND
30A
30A
I
N
P
U
T
O
U
T
P
U
T
AC
IN
N
L1
L2
N1
L1
L2
N2
I
N
P
U
T
O
U
T
P
U
T
Main
Distribution Panel
Two
Auto Power 3000
units shown
.
Summary of Contents for 091-269-12-2000
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