Quick Start Guide

Wiring Data
N
E
U
L1 L2
GRID
L1 L2
GEN
N
E
U
N
E
U
L1 L2
OUT
RELAY
AUX
+ -
12V
AUX
Switch
INV
Remote
Battery
Temp
FM80 #1 FM80 #2
MATE3s
HUB
10.3
GS8048A
GSLC175-PV-120/240
ON/OFF
INV
FN-DC (FN-DC wiring is displayed
on the Wiring page.)
20
900-0162-01-01 REV A Sheet 2 of 3
©2017 OutBack Power Technologies. All Rights Reserved.
AC Wire Sizes and Torque Values
OutBack recommends that conductors be
#6 AWG THHN copper, or larger, rated to 75°C
(minimum) unless local code requires otherwise.
AWG In-lb
#14 to #10 20
#8 25
#6 to #4 35
#3 35
#2 40
#1 50
1/0 50
mm
2
2.5 to 6
10
16 to 25
35
35
50
70
Nm
2.3
2.8
4.0
4.0
4.5
5.6
5.6
Wire Size Torque
CAUTION:
Equipment Damage
When connecting cables from the Radian
inverter to the battery terminals, observe the
proper polarity. Incorrect connection can
damage or destroy the equipment and void
the warranty.
!
DC Wiring Notes
o Battery cables should be no longer than 10 feet (3 m) each to minimize voltage loss and
other possible effects.
o Turn off DC circuit breakers or remove fuses before proceeding.
o Tie, tape, or twist cables together to reduce self-inductance. Run positive and negative
cables
through the same knockouts and conduit.
o Each inverter battery terminal is a threaded stud which accepts a ring terminal lug. Use
compression lugs or crimped and sealed copper ring lugs with 5/16 inch (0.79 cm) holes.
o Install overcurrent devices according to applicable codes.
o The DC terminals must be installed in an enclosure to meet NEC requirements. The
GSL
C meets this requirement. Note that the GSLC top can be removed for access.
o The modular construction of the GS8048A requires two DC circuit breakers or fuses.
Both se
ts of positive terminals must be connected to battery power.
o The GS4048A has two sets of positive terminals, but only the terminals on the left are
functiona
l. The terminals on the right must not be connected to battery power.
AC Wiring Notes
o Recommended conductor size: #6 AWG (16 mm
2
) or 0.021 in
2
o Inverter output varies with model; size the loads accordingly
o The transfer relay is rated 60 Aac; AC input and output may need to be protected with branch-rated circuit breakers of
maximu
m 60 Aac size to meet applicable code requirements
o The neutral terminals are common; typically only one is used
o Only one AC source can be wired at a time; use an external selector switch if more than one source is available
Generator Notes
o A generator should be sized to provide enough power for maximum loads and charging at the same time
o Minimum generator size is recommended to be twice the power of the inverter(s) due to overload and/or balancing issues
Negative Battery Cable Connections
Shunt
Bolt 3/8"
Lock
Washer
Flat
Washer
Battery
Negative
(–) Lug
DC
Negative (-)
Plate
(GS-SBUS)
1
2
3
4
5
6
Charge Controller
Terminals
7
8
Mechanical Interlock
(Bypass)
9
10
11
12
13
14
15
16
17
18
19
20
DC Positive (+) Plate
(not used on
GSLC175PV1-120/240)
21
22
DC Negative (–) Plate
(GS-SBUS)
AC Terminals – Inverter
DC Terminals – Inverter
AC Circuit Breakers
DC Circuit Breakers
GFDI
PV Circuit Breakers
Communication Ports
Auxiliary Terminals
AC OUT Bus Bar L1
AC OUT Bus Bar L2
GRID IN Bus Bar L1
GRID IN Bus Bar L2
GEN IN Bus Bar L1
GEN IN Bus Bar L2
AC Neutral
Ground
PV Negative (–) Terminals
PV Positive (+) Bus Bars
Grounding Notes
o This product meets the IEC requirements of Protection Class I.
o This product must be connected to a permanent wiring system that is grounded according to the IEC 60364 TN standard.
o The input and output are isolated from ground. The installer is responsible for grounding according to all applicable codes.
o The central AC ground terminals are common. Typically only one is used.
o Minimum conductor size for the ground TBB: #8 AWG (10 mm
2
) or 0.013 in
2
. Torque requirements: 25 in-lb (2.8 Nm).
WARNING: Shock Hazard
 For safety, the neutral and ground conductors should be mechanically bonded. OutBack does not bond these conductors within the inverter.
 The GSLC is equipped with a neutral-ground bond. Remove this bond if the bond is required to be made at the main panel or another location.
Make sure that no more than one bond is present in the AC system at any time.
 For all installations, the negative battery conductor should be bonded to the grounding system at only one point. If the OutBack GFDI is present, it
can provide the bond.
Torque Requirements
DC Plates
Torque
In-lb
Nm
Upper holes (+) 60 6.8
Lower holes (+) 50 5.6
Shunt Bolts (–), GS-SBUS,
Inverter DC terminals
60 6.8
Circuit Breaker Stud
Torque
In-lb
Nm
M8 20 2.3
1/4 - 20 35 4.0
5/16 - 18 50 5.6
3/8 - 16 225
25.4
Minimum DC Cable based on
the DC Circuit Breaker
Torque
In-lb Nm
50 5.6
225 25.4
225 25.4
Circuit
Breaker
Cable Size
125 1/0 (70 mm
2
)
175* 2/0 (70 mm
2
)
250 4/0 (120 mm
2
)
35 4.080 #4 AWG (25 mm
2
)
35 4.060 #6 AWG (16 mm
2
)
IMPORTANT
 This product requires batteries for operation. The required nominal voltage is 48 Vdc.
 This inverter/charger product uses a three-stage cycle to charge batteries. The default settings
ar
e for lead-chemistry batteries intended for deep discharge. These include all energy storage
offered by OutBack Power. OutBack recommends the use of batteries designed specifically for
renewable energy applications.
 Protection for the battery circuit external to this product must be provided by the installer.
 Protection for the AC circuit external to this product must be provided by the installer.
 Prewired load centers are for single inverters only. See application notes on the OutBack
website for applications with multiple inverters.
Positive Battery Cable Connections
Bolt 3/8"
DC
Positive (+)
Plate
Battery
Positive (+)
Lug
Flat Washer
Nut
Lock Washer
Flat Washer
GSLC175PV1-120/240
DC
Disconnect
Stud
Battery
Positive
(+) Lug
FM80 Positive
(+) Terminal
Flat Washer
Nut
Lock Washer
FN-DC
Positive (+)
Sense
Terminal
GSLC175PV-120/240
*Minimum recommended size per DC disconnect for
both GS4048A and GS8048A
1
2
3
2
4
5
6
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
2
8
9
9 9
10 10
20
21
9
22
20
4
2
7