44
Freedom SW Installation Guide
Stacking Features
Parallel Stacking
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 47.
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:
Freedom SW 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.
Figure 17
Parallel Stacking Using Two Freedom SW 3012s
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
LI
N
E
1
30A
AC
IN
PU
T
LI
N
E
2
30A
IN
V
E
R
T
E
R
AC
O
U
T
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
A
M
A
G
E
T
O
U
N
IT
.
BATTERY
NEGATIVE
BAT
TERY
POSI
TI
VE
AC GROUNDS
(BEHIND COVER)
AC
OUT
30A
AC
IN
PU
T
LI
N
E
1
30A
AC
I
N
PU
T
LI
N
E
2
30A
IN
V
E
R
T
ER
AC
O
U
T
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.
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 Freedom SW 3012 units shown.
Freedom SW 3K2K InvChg Install Guide.book Page 44 Wednesday, October 12, 2011 4:40 PM
