97-0020-01-01
47
Stacking Features
This
g
u
id
e for
u
se by qu
alifi
ed installers only.
DC Connections for Stacked Inverters
Individual overcurrent devices are to be used between the battery positive
and each inverter. Keep cable lengths to the two inverter/chargers the same
in order to balance cable losses. The battery cable between the two inverter/
chargers should not exceed 12 inches (30.48 cm) in length.
Connect the stacked system as follows:
1.
Connect each negative terminal to the battery.
2.
Connect a Grounding wire to the common negative.
3.
Connect each positive terminal of the inverter to the battery through a
DC disconnect in each positive line. Do not tie the positives together
between inverters.
4.
Connect the Ground bonding wire from each inverter to the same
location on the vehicle chassis. Use that same length and gauge wire
for both inverter/chargers.
5.
Connect the battery temperature sensors (BTS), if needed.
Figure 20
Connecting Battery Cables and DC Ground Wires
Vented Battery
Enclosure
12Vdc or
24Vdc
Vehicle Chassis
Ground
AC IN
WARNING:
INCORRECT BATTERY
P
O
L
A
RI
T
Y
W
IL
L
C
A
US
E
DA
M
A
G
E
T
O
UN
IT
.
BATTERY
NEGATIVE
BAT
TERY
POS
ITI
VE
AC GROUNDS
(BEHIND COVER)
AC
OUT
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.
WARNING:
INCORRECT BATTERY
P
O
L
A
R
ITY
W
IL
L
C
A
U
S
E
D
A
M
A
GE
TO 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
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.
xantrex
xantrex
AC
IN
N
L1
L2
N1
L1
L2
N2
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
Two Freedom SW 3012 units shown.
1
2
3
4
5
Freedom SW 3K2K InvChg Install Guide.book Page 47 Wednesday, October 12, 2011 4:40 PM
