Go Power GP-ISW-200 User manual

PURE SINE WAVE INVERTER
GP-ISW-200/400
User Manual
© 2018 Go Power!®
Worldwide Technical Support and Product Information gpelectric.com
Go Power! Headquarters
201-710 Redbrick St, Victoria, BC Canada V8T 5J3
Tel: [phone]
82654_MAN_ISW200-400_RevA

[page 2] | gpelectric.com
Congratulations on purchasing your Go Power! GP-ISW Inverter. The unit is a highly reliable DC-
AC inverter system, designed with advanced power electronic and microprocessor technology
o󰀨ering the following features;
• Pure Sine wave output (THD <5%).
• Intelligent power management software.
• Load and temperature controlled cooling fan.
• GP-SWR-A/GP-ISW-R management and control.
• Dry contact terminals.
• Advance protection features;
• Input over/under voltage protection.
• Internal over temperature protection.
• Input reverse polarity protection (fuse).
• Output overload protection.
• Output short-circuit protection.
Product Packaging
Please safely store the packaging the GP-ISW was delivered in or please
recycle the packaging components as outlined below;
CFB
CFB
3
4
7
CFB
CFB
3
4
7
Plastic Bag
Plastic Bubble
Wrap
LDPE
Low Density
Polyethylene
CFB
CFB
3
4
7
CFB
CFB
3
4
7
Corrugated berboard
Main box &
Internal sleeve
CFB
CFB
3
4
7
Corrugated
Recycles
www.corrugated.org
www.earth911.com/recycling-center-search-guides
Local recycling centres can be found here;

gpelectric.com | [page 3]
1. CONTENTS
2. GENERAL INFORMATION .................................................................................................4
2.1 CAUTIONS / WARNINGS.................................................................................4
2.2 DISCLAIMERS................................................................................................10
2.3 GP-ISW KIT PARTS........................................................................................ 11
2.3.1 PARTS CHECKLIST ......................................................................... 11
2.4 UNIT DIMENSIONS........................................................................................12
2.5 VOLTAGE AND TEMPERATURE PERFORMANCE ......................................13
3. INSTALLATION .................................................................................................................15
3.1 TYPICAL SYSTEM OVERVIEW.................................................................... 15
3.2 MOUNTING REQUIREMENTS ..................................................................... 16
3.3 DC WIRING ................................................................................................... 18
3.3.1 DC WIRING SIZING .........................................................................19
3.3.2 DC OVERCURRENT PROTECTION ...............................................20
3.3.3 PREPARING THE DC CABLES .......................................................20
3.3.4 DC CABLE CONNECTIONS ............................................................20
3.3.5 WIRING THE INVERTER TO THE BATTERIES ..............................21
3.3.6 DC GROUNDING .............................................................................22
3.4 AC WIRING.................................................................................................... 22
3.4.1 AC OUTPUT INTERFACE ................................................................23
3.4.2 GP-ISW 200/400AC OUTPUT INTERFACE.....................................23
4. OPERATION......................................................................................................................25
4.1 FINAL INSPECTION.......................................................................................26
4.2 TESTING THE INSTALLATION ......................................................................26
4.3 CONNECTING THE AC LOADS.....................................................................26
4.4 LED INDICATORS ..........................................................................................26
4.4.1 INPUT VOLTAGE LEVEL..................................................................26
4.4.2 INVERTER STATUS TO DISPLAY FAULT CONDITION ..................27
4.5 FUNCTION SWITCH ......................................................................................28
4.5.1 OUTPUT VOLTAGE SELECTION (S1&S2)......................................28
4.4.2 OUTPUT FREQUENCY SELECTION (S3) ......................................28
4.6 POWER SAVING SELECTION (S4)...............................................................28
4.8 SHUTDOWN CONDITIONS ...........................................................................29
5. WARRANTY RETURN PROCEDURE ..............................................................................30
6. PRODUCT END OF LIFE & RECYCLING........................................................................31
www.earth911.com/recycling-center-search-guides

[page 4] | gpelectric.com
2.1 CAUTIONS / WARNINGS
This document contains important safety instructions for the products produced by
Go Power. Read all instructions and cautionary markings on the product and on any
accessories or additional equipment included in the installation. Failure to follow these
instructions could result in severe shock or possible electrocution. Use extreme caution at
all times to prevent accidents.
All electrical work must be performed in accordance with local and national electrical codes.
These instructions are for use by qualied personnel who meet all local and governmental
code requirements for licensing and training for the installation of electrical power systems
with AC and DC voltage up to 600 volts.
Installation, maintenance, and connection of inverters must be performed by qualied
personnel, in compliance with local electrical standards, wiring rules, and the requirements
of local power authorities and/or companies.
Safety regulations relevant to the location shall be followed during installation, operation and
maintenance. Improper operation may have a risk of electric shock or damage to equipment
and property.
2. GENERAL INFORMATION

gpelectric.com | [page 5]
GENERAL INFORMATION
General Safety
WARNING!
Limitations on Use
CAUTION!
Equipment Damage
This equipment is NOT intended for use with life support
equipment or other medical equipment or devices.
This product is designed for indoor/compartment
installation. It must not be exposed to any liquids, moisture
of any type.
Only use components or accessories recommended or sold
by Go Power! or its authorized agents.
IMPORTANT
Do not attempt to install this equipment if it appears to
be damaged in any way. See the Warranty section for
instructions on returning the equipment.
WARNING!
Hazard to Human Life
This type of notation indicates that the
hazard could be harmful to human life.
WARNING!
Shock Hazard Danger of shock or electrocution.
WARNING!
Burn / Fire Hazard Danger of hot surface and/or re.
CAUTION!
Hazard to Equipment
This type of notation indicates that
the hazard may cause damage to the
equipment.
IMPORTANT
This type of notation indicates that the
information provided is important to the
installation, operation and/or maintenance
of the equipment. Failure to follow the
recommendations in such a notation could
result in annulment of the equipment
warranty.
i

[page 6] | gpelectric.com
GENERAL INFORMATION
Personal Safety
WARNING!
Personal Injury
Use safe lifting techniques when lifting this equipment as
recommended by the Occupational Safety and Health
Association (OSHA) or other local codes.
Use standard safety equipment when working on this
equipment, such as safety glasses, ear protection, steel-
toed safety boots, safety hard hats, etc.
Use standard safety practices when working with electrical
equipment. (Remove all jewelry, use insulated tools, wear
cotton clothing, etc.)
Never work alone when installing or servicing this
equipment. Have someone nearby that can assist if
necessary.
Ensure that children, pets, and other animals are kept away
from the inverter, solar arrays, battery bank, and utility grid
components.
If the equipment is used in a manner not specied by the
manufacturer, the protection provided by the equipment may
be impaired.

GENERAL INFORMATION
Equipment Safety
WARNING!
Lethal Voltage
Review the system conguration to identify all possible
sources of energy. Ensure ALL sources of power are
disconnected before performing any installation or
maintenance on this equipment. Conrm that the terminals
are de-energized using a validated voltmeter (rated for
a minimum 1000 VAC and 1000 VDC) to verify the de-
energized condition.
Do not perform any servicing other than that specied in the
installation instructions unless qualied to do so, or have
been instructed to do so by Go Power! Technical Support
personnel.
To avoid electric shock, disconnect the DC input and AC
input of the inverter at least 5 minutes before performing any
installation or maintenance.
Do not tighten the AC and DC terminals or pull on the AC and
DC wiring when the inverter is running.
WARNING!
Fire Hazard
Do not keep combustible or ammable materials in the same
room with the equipment. Some products contain relays with
moving parts and are not ignition-protected.
Ensure AC, DC, and ground cable sizes conform to local
codes. See product manuals for minimum size requirements.
Ensure all conductors are in good condition.
Do not operate the unit with damaged or substandard cabling.
CAUTION!
Equipment Damage
When connecting cables from the inverter to the battery
terminals, ensure the proper polarity is observed. Connecting
the cables incorrectly can damage or destroy the equipment
and void the product warranty.
Thoroughly inspect the equipment prior to energizing. Verify
that no tools or equipment have been inadvertently left
behind.
Keep all vents clear of obstructions that can prevent proper air
ow around, or through, the unit.
CAUTION!
Equipment Damage
Static electricity may damage electronic components. Take
appropriate steps to prevent such damage to the inverter;
otherwise the warranty may be annulled.
gpelectric.com | [page 7]

[page 8] | gpelectric.com
GENERAL INFORMATION
Battery Safety
WARNING!
Explosion, Electrocution,
or Fire Hazard
Ensure the cables (conductors) are properly sized.
Ensure clearance requirements are strictly enforced around
the batteries.
Ensure the area around the batteries is well ventilated and
clean of debris.
Never smoke, or allow a spark or ame near the batteries.
Always use insulated tools. Avoid dropping tools onto
batteries or other electrical parts.
Never charge a frozen battery.
Never use old or untested batteries. Check each battery’s
label for age, type, and date code to ensure all batteries are
identical.
If a battery must be removed, always remove the grounded
terminal from the battery rst. Make sure all devices are de-
energized or disconnected to avoid causing a spark.

gpelectric.com | [page 9]
GENERAL INFORMATION
IMPORTANT
Use the battery types recommended by Go Power. Follow
the battery manufacturer’s recommendations for installation
and maintenance.
Insulate batteries as appropriate against freezing
temperatures. A discharged battery will freeze more easily
than a charged one.
If a remote or automatic generator control system is used,
disable the starting circuit and/or disconnect the generator
from its starting battery while performing maintenance to
prevent accidental starting.
Wear complete eye and clothing protection when working
with batteries. Avoid touching bare skin or eyes while working
near batteries.
Keep plenty of fresh water and soap nearby in case battery
acid contacts skin, clothing, or eyes.
If battery acid contacts skin or clothing, wash immediately
with soap and water. If acid enters the eye, immediately
ood it with running cold water for at least 20 minutes and get
medical attention as soon as possible.
CAUTION!
Equipment Damage
When connecting cables from the inverter to the battery
terminals, ensure the proper polarity is observed. Connecting
the cables incorrectly can damage or destroy the equipment
and void the product warranty.
Thoroughly inspect the equipment prior to energizing. Verify
that no tools or equipment have been inadvertently left
behind.
Ensure clearance requirements are strictly enforced.
Keep all vents clear of obstructions that can prevent proper
air ow around, or through, the unit.
CAUTION!
Equipment Damage
Static electricity may damage electronic components. Take
appropriate steps to prevent such damage to the inverter;
otherwise the warranty may be annulled.
i

[page 10] | gpelectric.com
2.2 DISCLAIMERS
IMPORTANT: Please follow installation and wiring instructions exactly as outlined to ensure
safety. We recommend installation by an RV/marine technician or professional electrician
to ensure adherence to relevant electrical codes. We have made every reasonable e󰀨ort to
ensure the accuracy of the instructions in this manual, but Go Power does not guarantee that
the information is error free, nor do we make any other representation, warranty or guarantee
that the information is accurate, correct, reliable or current. The specications in this manual
are for reference purposes only and are subject to change without notice. For additional
information please see www.gpelectric.com.
DISCLAIMER: Go Power disclaims liability for any direct, indirect or incidental damages
caused by, or in case of, installation not performed following the instructions and cautions in this
manual. Go Power will refuse requests for exchanges or returns, resulting from the purchase
and installation of items which do not comply with local codes. To avoid such concerns Go
Power recommends installation by a professional electrician or RV technician. Examples that
are shown within this manual are for illustrative purposes only.
GENERAL INFORMATION

gpelectric.com | [page 11]
GENERAL INFORMATION
2.3 GP-ISW KIT PARTS
Please unpack and make sure all parts shown in the list below are included in the kit. If any
parts are missing please contact Go Power customer service team at customersupport@
gpelectric.com or 1.866.247.6527.
2.3.1 PARTS CHECKLIST
ITEM # DESCRIPTION
01 GP-ISW Unit 1
02 Ring Terminal 2
2 1

[page 12] | gpelectric.com
Model A (mm) B (mm) C (mm) D (mm) E (mm) F (mm)
GP-ISW200 187 35.7 116 150 8.0 68
GP-ISW400 187 35.7 116 150 8.0 68
GP-ISW700 330 80 132 200 7.0 83
GP-ISW1000 372 69 196 200 7.0 83
GP-ISW1500 421 92 196 248 7.0 83
GP-ISW2000 443 103 196 248 7.0 83
GP-ISW3000 442 103 196 255 7.0 158
GP-ISW4000 462 113 196 255 7.0 158
GENERAL INFORMATION
2.4 UNIT DIMENSIONS
F
A
D
E
C
B

gpelectric.com | [page 13]
GENERAL INFORMATION
GP-ISW-200 Specification
Electrical
Specification
Model No.
Item
GP-ISW-200-12 GP-ISW-200-24
Input
Voltage
12VDC 24VDC
Voltage Range
10.0~16.0VDC 2 0.0~32.0VDC
No Load Current
< 0.5A < 0.4A
Power Saving Mode
< 0.12A < 0.06A
Efficiency (Typ.)
89% 91%
On Mode @ Save Mode
< 0.12A < 0.06A
On Mode @ No Load Mode
< 0.5A < 0.4A
Output
Continuous Output Power
Over Rated Power
(3 Min.)
230 W
200 W
Peak Power (3 Sec.)
250 W
Frequency
50 / 60 Hz ± 0.5% (Dip Switch Selectable)
Output Voltage
100 / 110 / 115 / 120 VAC ± 5%
(Dip Switch Selectable)
Short-Circuit Protection
2 seconds and restart 3 times shutdown
Output Waveform
Pure Sine Wave (THD < 3%@ Normal Load)
Protection
Input Over-Voltage
Protection
16.0VDC ± 3% 32.0VDC ± 3%
Input Under-Voltage
Protection
10.0VDC ± 3% 20.0VDC ± 3%
BAT. Low Shutdown
10.0VDC ± 3%
20.0VDC ± 3%
BAT. Low Alarm
10.5VDC ± 3%
21.0VDC ± 3%
BAT. Low Restart
12.5VDC ± 3%
25.0VDC ± 3%
BAT. High Alarm
15.5VDC ± 3%
31.0VDC ± 3%
BAT. High Shutdown
16.0VDC ± 3%
32.0VDC ± 3%
BAT. High Restart
14.5VDC ± 3%
29.0VDC ± 3%
Environment
Working Temp.
-20˚C ~ 60˚C
Storage Temp.
-30˚C ~ 70˚C
Working Humidity
10~95% RH, non condensing
Safety &
EMC
Safety Standards
----
EMC standards Certified FCC class B
E-mark
----
Others
Dimension(WxHxD)
150 mm X 68mm X187 mm
Weight
1.6kg
Remote Control
CR-8 (optional)
Cooling
Temperature & Load Controlled cooling Fan
Table 1. GP-ISW-200 Specification
Note：
This test condition is normal DC input and temperature 25˚C
2.5 VOLTAGE AND TEMPERATURE PERFORMANCE
Surge Power (3 Sec.)
GP-SWR-A

[page 14] | gpelectric.com
GENERAL INFORMATION
7
2-3-3. GP400 Specification
Electrical
Specification
Model No.
Item
GP400-112
GP400-124
GP400-148
Input
Voltage
12VDC
24VDC
48VDC
Voltage Range
10.5~16.0VDC
21.0~32.0VDC
42.0~64.0VDC
No Load Current
<1A @12VDC
<0.5A @24VDC
<0.25A @48VDC
Power Saving Mode
<0.2A @12VDC
<0.1A @24VDC
<0.05A @48VDC
Efficiency (Typ.)
88%
89%
90%
On Mode @ Save Mode
<1A @12VDC
<0.5A @24VDC
<0.25A @48VDC
On Mode @ No Load Mode
<0.2A @12VDC
<0.1A @24VDC
<0.05A @48VDC
Output
Continuous Output Power
400 W(± 3%)
Max. Output Power (1Min.)
> 400 W~460 W(100%~115%)
Surge Power (1Sec.)
< 800 W
Frequency
50 / 60 Hz ± 0.5% (Dip Switch Selectable)
Output Voltage
100 / 110 / 115 / 120 VAC ± 5% (Dip Switch Selectable)
Short-Circuit Protection
1 Sec Shutdown
Output Waveform

Pure Sine Wave (THD < 5%@ Normal Load)
Protection
Input Over-Voltage
Protection
16.0 ± 0.3VDC 32.0 ± 0.5VDC 64.0 ± 1.0VDC
Input Under-Voltage
Protection
10.5 ± 0.3VDC 21.0 ± 0.5VDC 42.0 ± 1.0VDC
BAT. Low Shutdown
10.5 ± 0.3VDC
21.0 ± 0.5VDC
42.0 ± 1.0VDC
BAT. Low Alarm
10.5 ± 0.3VDC
21.0 ± 0.5VDC
42.0 ± 1.0VDC
BAT. Low Restart
14.5V± 0.3V
28.0 ± 0.5VDC
56.0 ± 0.5VDC
BAT. High Shutdown
16.0 ± 0.3VDC
32.0 ± 0.3VDC
64.0 ± 0.3VDC
BAT. High Restart
12.5V± 0.3V
25.0V± 0.3V
50.0± 0.3V
Environment
Working Temp.

-20
℃
~40
℃
Storage Temp.
-30
℃
~70
℃
Working Humidity
10~95% RH, non-condensing
Safety &
EMC
Safety Standards Certified UL 458
(UL only for GFCI receptacles)
----
EMC standards
Certified FCC class B
E-mark
----
Others
Dimension(WxHxD)
150 mm X 68mm X187 mm
Weight
1.256kg
Remote Control
CR-8 (optional)
Cooling
Temperature & Load Controlled cooling Fan
Table 4. GP400 for output 100/110/115/120 VAC specification
Note：
：
Normal load Condition：Vin =12.5V/25V/50V, Vo=100/110/115/120 VAC 80% load
(PF=1.0)
Voltage performance：Please refer to Figure 2
Temperature performance：Please refer to Figure 3
GP-ISW-400 Specification
Electrical
Specification
Model No.
Item
GP-ISW-400-12 GP-ISW-400-24
Input
Voltage
12VDC 24VDC
Voltage Range
10.5~16.0VDC 2 1.0~32.0VDC
No Load Current
< 1A @12VDC < 0.5A @24VDC
< 1A @12VDC < 0.5A @24VDC
< 0.2A @12VDC < 0.1A @24VDC
< 0.2A @12VDC < 0.1A @24VDC
Power Saving Mode
Efficiency (Typ.)
88% 89%
On Mode @ Save Mode
On Mode @ No Load Mode
Output
Continuous Output Power
Over Rated Power
(1Min.) > 400 W~460 W (100%~115%)
400 W (± 3%)
Peak Power (3 Sec.)
800 W
Frequency
50 / 60 Hz ± 0.5% (Dip Switch Selectable)
Output Voltage
100 / 110 / 115 / 120 VAC ± 5%
(Dip Switch Selectable)
Short-Circuit Protection
1 second shutdown
Output Waveform
Pure Sine Wave (THD < 5%@ Normal Load)
Protection
Input Over-Voltage
Protection
16.0VDC ± 0.3VDC 32.0 ± 0.5VDC
Input Under-Voltage
Protection
10.5VDC ± 0.3VDC 21.0VDC ± 0.5VDC
BAT. Low Shutdown
10.5VDC ± 0.3VDC
21.0VDC ± 0.5VDC
BAT. Low Alarm
10.5VDC ± 0.3VDC
21.0VDC ± 0.5VDC
BAT. Low Restart
14.5VDC ± 0.3V
28.0VDC ± 0.5VDC
BAT. High Shutdown
16.0 ± 0.3V
32.0VDC ± 0.3VDC
BAT. High Restart
12.5VDC ± 0.3V
25.0VDC ± 0.3V
Environment
Working Temp.
-20˚C ~ 40˚C
Storage Temp.
-30˚C ~ 70˚C
Working Humidity
10~95% RH, non-condensing
Safety &
EMC
Safety Standards
EMC standards Certified FCC class B
E-mark
----
Others
Dimension(WxHxD)
150 mm X 68mm X187 mm
Weight
1.3kg
Remote Control
CR-8 (optional)
Cooling
Temperature & Load Controlled cooling Fan
Table 2. GP-ISW-400 for output 100/110/115/120 VAC Specification
Certified UL 458
(UL only for GFCI receptacles)
10
GP-SWR-A or GP-ISW-R

gpelectric.com | [page 15]
INSTALLATION
ON / OFF / Remote Main Switch
LED Indicator
AC Output
Function Switch
3
4
2
1
ON / OFF / Remote Main Switch 
The 3-stage switch  is for turning on, turning o󰀨 and remote mode.
LED Indicator 
Inverter status to display fault condition
Figure 1. GP-ISW-200 & 400 front panel view
3. INSTALLATION
3.1 TYPICAL SYSTEM OVERVIEW
The following diagrams show how the GP-ISW-Inverter and GP-ISW-R are typically installed in
a mobile RV application. The diagrams show where the remote and Inverter are installed and
how the mobile power system can be integrated with a Go Power! RV Solar Kit (sold separately
by Go Power, please contact an authorized dealer directly).

[page 16] | gpelectric.com
INSTALLATION
3.2 MOUNTING REQUIREMENTS
1. TEMPERATURE
Make sure the GP-ISW is installed in a location where the normal air temperature is between
-20°C and 40°C. The cooler the better within this range.
2. MOISTURE
Do not allow water or other uids to come into contact with the GP-ISW. Do not expose to
rain, snow or water.
3. VENTILATION
For optimum Inverter performance the GP-ISW must be installed so the front and rear air vents
are not blocked or obstructed in any way. Do not install the GP-ISW in an area with limited
air ow. Allow as much space around the Inverter as possible, leaving at least 4 inches of
airspace clearance around all ventilation areas.
CAUTION! Equipment Damage. Do not mount the GP-ISW in a zero clearance
compartment. Do not cover the ventilation openings. Overheating and mechanical
failure may occur.
4. FIRE
Install the GP-ISW away from the battery bank, away from any ammable or combustible
material (paper, ammable liquids, gasoline, cloths) that may be ignited by heat, sparks or
ames. Never place the Inverter directly above the battery bank - gases from the batteries will
corrode and damage the Inverter, never allow battery acid to drip onto the unit.
5. ACCESSIBILITY / ORIENTATION
Do not block access to the GP-ISW remote control access port, status LEDs and the On/O󰀨
switch. Allow enough room to access the AC and DC wiring terminals and connections as
they will need to be checked and tightened periodically. The GP-ISW must be installed in one
of the approved mounting orientations detailed on page 20. DO NOT MOUNT VERTICALLY.
6. CLEAN
The GP-ISW should be installed in a location which is clean and limits the introduction of
dust, fumes, insects or rodents which could enter and block the Inverter ventilation openings.
7. PROXIMITY TO BATTERY BANK
The GP-ISW should be located as close to the batteries as possible but not within the same
compartment. The length and size of the DC Cables will a󰀨ect performance. Long DC wires
tend to lose e󰀩ciency and reduce the overall performance of the Inverter/Charger. Use the
DC cables recommended on page 23.

gpelectric.com | [page 17]
INSTALLATION
HORIZONTAL WALL MOUNT, BASE DOWN
HORIZONTAL WALL MOUNT, BASE DOWN
HORIZONTAL MOUNT, BASE DOWN
HORIZONTAL MOUNT, BASE UP
VERTICAL MOUNT, DO NOT MOUNT THE
GP-ISW IN THIS CONFIGURATION
*GP-ISW model may not be exactly as shown

[page 18] | gpelectric.com
INSTALLATION
3.3 DC WIRING
ON
OFF
Sub Panel
ISW Remote Control (Optional)
Solar Panel
Solar Panel
Solar Charge
Controller
Refrigerator
Vent Cover
or
Cable Entry Plate
Fuse
Battery Disconnect Switch
(not required if circuit breaker is used)
Battery Bank
Fuse or Circuit Breaker
GP-ISW
To Battery
Bank
To Battery
Bank
DC Panel
Earth Ground (RV Ground)
AC
Loads
The following points must be observed for the DC Wiring.
• The DC positive and negative cables connected to the GP-ISW from the battery
bank should be linked together with zip ties or electrical tape every 6”. This helps
to reduce radio frequency interference and reduces the e󰀨ects of inductance both
of which improve the Inverter waveform and reduces the wear of the Inverters
lter capacitors.
• To ensure optimum Inverter performance the number of connections between
the battery bank and the GP-ISW unit should be minimized except from the
over-current and battery disconnect devices. All additional connection points
will cause extra voltage drops.
• The Battery bank voltage must match the DC voltage required by the GP-ISW,
which is 12V or 24V (note that the Inverter is either 12V or 24V, and is not
switchable).
• All DC cable wire terminations should use a crimped and sealed copper ring terminal
lugs.
• Make sure all cables have a smooth bend radius and no kinks are present.
• Color code all DC Cables coming to / from the battery bank. Use colored electrical
tape or heat shrink tubing. Red for positive (+), Black for negative (-) and Green for
DC ground.

gpelectric.com | [page 19]
INSTALLATION
3.3.1 DC WIRING SIZING
The distance between the battery bank and the GP-ISW should be as short as possible to achieve
maximum e󰀩ciency and to reduce re hazards. The size of the cable should be thick enough
to limit the voltage drop to less than 2% when carrying the maximum input current to prevent
frequent low-input voltage warnings and shutdown. Only use high quality copper wire.
For greater e󰀩ciency, the cables should be as short as possible. The combined cable length should
be no more than 10ft (3m). Keeping your wire runs as short as possible helps to prevent: low
voltage shutdowns and nuisance tripping of the DC breaker because of increased current draw.
The table below shows the recommended DC cable size, fuses/circuit breakers and DC grounding
cable sizes for the GP-ISW (Note: these values are correct for cables in free air, not conduit)
Model Wire AWG Inline Fuse / Circuit Breaker
GP-ISW200-12 #6 F-110A
GP-ISW200-24 #6 F-110A
GP-ISW400-12 #6 F-110A
GP-ISW400-24 #6 F-110A
GP-ISW700-12 #6 F-110A
GP-ISW700-24 #10 F-110A
GP-ISW1000-12 #4 F-110A
GP-ISW1000-24 #8 F-110A
GP-ISW1500-12 #2 F-200A
GP-ISW1500-24 #6 F-200A
GP-ISW2000-12 #2/0 F-300A
GP-ISW2000-24 #4 F-200A
GP-ISW3000-12 #4/0 F-400A
GP-ISW3000-24 #2 F-300A
GP-ISW4000-24 #2/0 F-400A

[page 20] | gpelectric.com
INSTALLATION
3.3.2 DC OVERCURRENT PROTECTION AND DC DISCONNECT
Batteries are capable of providing very large currents in case of a short circuit, if this occurs
with no DC overcurrent protection, it will result in overheating and melting of the cables and
possibly serious injury and/or re.
DC overcurrent protection is not included with the GP-ISW Inverters. It must be installed
between the Inverter and battery bank for safety reasons and to comply with code regulations.
The fuse should be as close to the positive battery terminal as possible. Use Bussmann ANN
Class T series fuses (will also require Fuse Block 4164) or equivalent. Ideally, the fuse/circuit
breaker should be installed within 18” (45cm) of the battery. The fuse required for DC Cable
lengths up to 10ft is detailed in the above table.
In all installations a battery disconnect switch is required, if you install a circuit breaker for
overcurrent protection this will su󰀩ce as a disconnect switch. If you install a fuse for overcurrent
protection then a separate disconnect switch will need to be installed.
3.3.3 PREPARING THE DC CABLES
Go Power! supplies 2 ring lugs with the GP-ISW which can be used for the Inverter end of the
DC Cables. Source the correct ring terminals for the batteries you are using.
• Cut the negative and positive cables to the required length.
• Strip o󰀨 enough insulation so you can install the ring lugs provided.
• Use the correct crimp connector to install the ring lugs.
• Attach the connectors to both ends of both cables. Make sure no stray wire
strands protrude from the connectors.
3.3.4 DC CABLE CONNECTIONS
When installing the battery cable ring lug onto the GP-ISW DC terminal and the battery post -
do not put anything between the ring lug and the metal surface. Incorrectly installed hardware
causes a high resistance connection which could lead to poor Inverter/Charger performance
and may melt the cable and terminal connections. Tighten the terminal connections securely
(torque to 9 – 10 ft-lbs, 11.7 – 13 Nm) and periodically check the connections to make sure
they remain tight and secure.