LG LG A1C-A5 Series User manual

LGXXXA1C-A5
AC Module System
Installation Manual
Important! Please read AC Module System Installation Manual before installing, wiring, or using this
product in any way. Failure to comply with these instructions will invalidate Warranty.
1
Copyright © 2017 LG Electronics.
All Rights Reserved.

AC Module System Installation Manual
Rev. 1.0
1Safety 5
1-1 Safety Symbol 5
1-2 Circuit Symbol 5
1-3 Important Safety Instructions 6
1-4 FCC Guideline 8
2Introduction 9
3Installation 10
3-1 Instruction before Installation 10
3-2 Checking the Install Site 11
3-3 Inspecting Components of an AC Module 12
3-4 Inspecting Components of an EnerBox2 13
3-5 Wiring Diagram of AC Module System 14
3-6 Installing the AC Junction Box and PV Rack 15
3-7 Mounting the AC module 16
3-8 Coupling AC cable Connectors 21
3-9 Building an Array of AC modules 23
3-10 Building Blocks of an Array 25
3-11 Grounding 34
3-12 Connecting Array of AC Modules to Distribution Panel 37
3-13 Grid Voltage Measurement 44
3-14 Grid Frequency Measurement 45
3-15 Energize the Installed AC Module System 46
Contents
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AC Module System Installation Manual
Rev. 1.0
4Communication 47
4-1 EnerBox2 components 48
4-2 Simple Diagram for Communication System Configuration 48
4-3 Installing EnerBox2 49
4-4 EnerVu2 Monitoring system ( Installer account ) 63
4-5 EnerVu2 Monitoring system ( Homeowner account ) 70
4-6 EnerVu2 Mobile Monitoring Application
( Installer account ) 72
4-7 EnerVu2 Mobile Monitoring Application
( Homeowner account ) 75
5Trouble Shooting Guide 79
5-1 EnerBox2 Inspection 79
5-2 Replacing an EnerBox2 80
5-3 Check the PLC Level 82
5-4 Micro Inverter Detection Issues 83
5-5 Internet Connection Issues 85
5-6 Micro Inverter Operation Issues 87
5-7 Grid Voltage Measurement 90
5-8 Grid Frequency Measurement 91
6Event List and Description 92
6-1 EnerBox2 Displays and Controls 92
6-2 Web-monitoring System Event List 94
Contents
3
Copyright © 2017 LG Electronics.
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AC Module System Installation Manual
Rev. 1.0
7Maintenance 96
8Accessories 97
9Product Specifications 99
9-1 AC Module, LGXXXA1C-A5 99
9-2 AC Cables 101
9-3 EnerBox2 102
10 Warranty 103
11 Transportation and Storage 103
12 Contact 103
Appendix 1 –AC module Installation Map 104
Appendix 2 –Module Installation & Load Guide 105
Appendix 3 –Alternative Equipment Grounding Devices 106
Revisions Table
Date Version Description of change Remark
2018.03. 19 1.0 First Release
Installation Manual
2018.05.29 1.1 Deletion of ‘Proposition 65’
4
Copyright © 2017 LG Electronics.
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Contents

AC Module System Installation Manual
Rev. 1.0
Note and comply with the safety guidelines of this manual while handling AC modules. Failure to
comply may result in severe damage to the equipment and/or fatal injuries.
Safety symbols are used to prevent property losses and human life damages during the
operation of this equipment.
1 Safety
1-1 Safety Symbol
Circuit symbols are used to describe the AC module circuit in this manual
Circuit symbol Description
DC current supply. Generated from PV module.
AC
current supply. Generated from utility and micro inverter. Used in electric
appliances
.
Symbol
representing the phase of AC current. Mark the number in front of this
sy
mbol
to represent the number of phases.
Equipment
Grounding Conductor (EGC). Conductor connecting normally non
–
current
carrying metal parts of equipment together.
Grounding
Electrode Conductor (GEC). Conductor connecting EGC and
neutral
conductor
to the ground for grounding.
1-2 Circuit Symbol
Safety Symbol Description
Failure
to comply with the instructions may cause a severe injury or
immediate
death
.
Failure
to comply with the instructions may cause death or severe injury.
Failure
to comply with the instructions may cause injury or property damage.
Failure
to comply with the instructions may cause a severe injury or
immediate
death
caused by electricity.
Failure
to comply with the instructions may cause injury or property
damage
caused
by fire.
5
Copyright © 2017 LG Electronics.
All Rights Reserved.

AC Module System Installation Manual
Rev. 1.0
•To prevent the risk of electric shock, do not touch any terminals in operation and wait for a few
minutes after turning a circuit breaker off. It may be energized in the open position.
•To prevent the risk of overvoltage, do not disconnect the cable connector in operation.
•Do not contact electrically active parts of the panel, such as terminals, without appropriate
safety gear. Contact may result in lethal spark or electric shock.
•To prevent the risk of electric shock, do not touch the glass surface or frame of the solar
module after installation.
•Do not use or install AC modules if the module is broken or torn. Failure to comply may result in
electric shock.
•To prevent the risk of burns, do not touch AC modules during operation.
•For safety, only qualified personnel should service modules.
•To prevent the risk of electric shock, stay away from any damaged modules. Do not operate the
module if you find broken glass or torn back sheets in any module.
•Damaged modules must be handled with proper safety equipment.
•Micro inverter warranty is void if cover removed. No serviceable parts inside. Refer to qualified
personnel for service.
•For proper operation, make sure to use AC cables, connectors and accessories provided by LG
Electronics. Parts that are not listed may cause critical danger.
•For proper operation, the AC module shall be connected only to a dedicated branch circuit.
•To prevent the risk of fire, do not connect any device between the AC module and circuit
breaker. Circuit breaker may not work properly.
•Before installation, make sure to check that the area of location meets the required environment.
•Perform all work in dry conditions and use only dry tools. Do not handle wet panels without
appropriate protection equipment.
•Damaged modules must be treated with safety protection equipment.
•Do not approach to the damaged or broken module unless you are an authorized or qualified
expert.
•Wastes, electrical parts, bolts, nuts, conductors or any other debris must be cleared after
installation.
•Do not bend AC cables. While under stress, it may occur module damage. Cable bending radius
should be more than 5 times the cable diameter, at least.
1-3 Important Safety Instructions
6
Copyright © 2017 LG Electronics.
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AC Module System Installation Manual
Rev. 1.0
•Use proper equipment, connectors, wires and buttresses for the installation of the module.
•To reduce the risk of accidents, install the AC modules during mild weather. For raining or snowy
days, electric shock hazard exists. For windy days, there is a difficulty to move the AC modules.
•To prevent the risk of injury, do not apply pressure on the module (ex. placing heavy objects or
stepping on the module).
•To prevent the risk of injury, do not drop the module. Modules must be gently handled and
placed down with care.
•For proper operation, do not scratch the coating surface of the frame. It may increase the
corrosion of the frame.
•For proper operation, do not artificially concentrate sunlight on the module surface.
•Addition of holes in the frame or glass of the module may decrease the strength and integrity of
the frame or glass.
•Do not remove warning labels. Do not apply a shock to micro inverter of the module or pull the
AC cable. Do not remove the labels attached on the module except the detachable label for
installation map .
•Store the module in its original package until installation.
•Do not use any kind of oil or lubricant on the module's any parts, It can defect the AC Module.
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Copyright © 2017 LG Electronics.
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•AC modules shall be mounted with racking and mounting products certified and listed for
system fire class rating in accordance with UL1703 edition 2014 and UL2703 edition 2014.
•The System Fire Class Rating of the module or panel in a mounting system in combination with a
roof covering must complete with requirements to achieve the specified System Fire Class
Rating for a non-BIPV module or panel.
•To make better air circulation along the backside of the AC module, it is recommended to install
the PV rack with a gap of at least 4 inches (100mm) between the back of the module and roof
surface. It might affect UL listing and fire class if it is less than 4 inches (100mm).
•Please check voltage range for use before installation of AC modules and EnerBox2. Refer to 9
Product Specifications.
•When installed on a roof, the PV module must be mounted over a fire-resistant roof. The fire
resistance of the PV module is class C according to ANSI/UL790.
•It is recommended to check with local authorities for fire safety guidelines and requirements for
any buildings or structures on to which the panels will be installed.
•Both AC and DC voltage sources are terminated inside this equipment.
•Each circuit must be individually disconnected before servicing.
•When the photovoltaic array is exposed to light, it supplies a DC voltage to this equipment.
•AC module arrays need to be connected only to a dedicated branch circuit.

AC Module System Installation Manual
Rev. 1.0
You are cautioned that changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user’s authority to operate this equipment.
This equipment has been tested and found to comply with the limits for a Class B Digital Device,
pursuant to Part 15 of the FCC Rules. These limits are designed Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction, may cause harmful interference to radio
communication. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
- Consult the dealer or an experienced radio/TV technician for help.
This device complies with part 15 of the FCC rules. Operation is subject to the following two
conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause
undesired operation.
Indoor use only
FCC Caution: For indoor use only; outdoor use or in any other environments not covered in this
manual may violate the FCC regulation and void the user’s authority to use the product.
Specially, within the 5.15-5.25 GHz band, U-NII device is restricted to indoor operations to reduce
any potential for harmful interference to co-channel MSS operations.
FCC RF Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits
set forth for an uncontrolled environment.
This equipment should be installed and operated with a minimum distance of 8.87 inches (20 cm)
between the radiator and your body. End users must follow the specific operating instructions for
satisfying RF exposure compliance. This transmitter must not be co-located or operating in
conjunction with any other antenna or transmitter.
CAUTION: Regulations of the FCC and FAA prohibit airborne operation of radio-frequency wireless
devices because their signals could interfere with critical aircraft instruments.
1-4 FCC Guideline
8
For Micro inverter & Communication Gateway (EnerBox2)
For Communication Gateway (EnerBox2)
Copyright © 2017 LG Electronics.
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AC Module System Installation Manual
Rev. 1.0 9
Copyright © 2017 LG Electronics.
All Rights Reserved.
LG AC module consists of aDC module and a micro inverter. Without an additional equipment, it
converts the solar energy to AC power which can be consumed by electric appliances in a home or
can be supplied to the utility.
The AC module produced by LG Electronics is delivered after completing the connection
between DC module and a micro inverter, which eliminates installation steps connecting a micro
inverter to aDC module. Thus, steps for the connection of DC module and a micro inverter can be
excluded.
Also, the AC module provides better flexibility for building PV arrays. The AC module is
equipped with two separate AC cable connectors (male and female). Thus the two AC cable
connectors enable landscape or portrait orientation without requirement of any trunk cables. Even
though there are roof vents on the target site, there is no worry because AC cable connection is
possible for the AC module array circumventing the vent area.
The mentioned advantages will reduce total installation and labor costs. Also, total installation
time will be shortened.
In this diagram, AC modules will produce power during daytime. The produced energy can be
consumed by home appliances like a fridge, TVs, and etc. Or if the power generation is more than
total power consumption in the house, the power will flow to the grid. Power flow is described
as .
The EnerBox2 utilizes power line communication (PLC) method to collect data from each AC
modules. The PLC matters to communication between micro inverters and a EnerBox2. The PLC
signal is depicted as .
The EnerBox2 sends data to the web server through a home router. Internet connection of the
EnerBox2 is possible with Wi-Fi or a LAN cable. Wireless communication is described as .
2 Introduction
AC Module System
The Advantage of AC Module System
1. AC Module
2. Communication
Gateway
3. Monitoring App
Indicator Flow
Power flow
PLC signal
Wireless
communication

AC Module System Installation Manual
Rev. 1.0
3 Installation
•LG AC module is “Grid Support Utility Interactive Inverter”, which requires approval from the
corresponding authority prior to connection with utility grid. Contact the applicable local
government agencies and/or utility company.
•Installation, maintenance, and supervision may only be carried out by an approved qualified and
authorized installer for the safety of workers and systems.
•Read and follow the installation guidelines specified in this manual. Installation with unapproved
methods may result in injuries including fatal injuries and/or damage to the equipment.
•Consult with LG Electronics for the approval of installation methods which are not specified in
the installation manual, but are going to be applied. Failure to comply will void the warranty and
the module certificate.
•After arrival of AC modules, check for possible damages during transportation. Damaged
modules should not be installed. Request an exchange by contacting LG Electronics Solar.
•If previously used modules (or parts) are replaced, check that the modified module works
properly. The modified module shall retain its model number.
•Secure all necessary permits and licenses to install the solar modules.
•Store the AC modules in its original packing before installation.
•Keep the AC modules in clear and secured area. Any particles or moisture may cause malfunction
of AC cable’s contactors.
•Consider the weight of AC module before installation.
•Do not work alone. Install AC modules with a team unit including at least 2 persons for safe
installation.
•To prevent the risk of accidents, use proper PPE (Personnel Protective Equipment) including
helmets and globes at all times.
•If installation location is high above ground, make sure to use Fall Protection System during the
installation.
•Plan the installation work in moderate weather. There is a risk of electric shock when it is raining
or snowing.
•Partial shadowing may substantially reduce energy production.
•Check whether all parts used for the installation are certified for outdoor usage.
•Keep the solar module and system away from children at all times.
•During the AC module installation, do not let children play near the module and the system.
•Care must be taken to avoid low tilt angles which may cause dirt to buildup on the glass. It can
be a cause of performance degradation.
•Dirt build-up on the surface of the panel may cause active solar cells to be shaded and electrical
performance to be impaired.
•Carry out the installation according to the local electric code.
3-1 Instruction before Installation
10
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AC Module System Installation Manual
Rev. 1.0
•Check whether the target site of installation meets the following requirements.
•Do not install AC modules near highly combustible structures or materials.
•Do not install AC modules where the maximum ambient temperature exceeds 65°C (149℉).
•Do not install AC modules at a place under direct exposure to salt water or ammonia.
•Do not install AC modules at a place easily accessible to people.
•Do not install AC modules indoors or on a moving vehicle.
•In an environment having frequent lightning storms, an auxiliary grounding may need to be
established by installer, which is connected directly from the AC module system to the ground.
•If the target installation structure lies on an uneven surface, do not forcefully modify the module
to fit in the structure. Make sure that the installation structure has been set up to provide a flat
surface. Unreliable structures may cause damage to the product during and/or after installation.
3-2 Checking the Installation Site
11
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AC Module System Installation Manual
Rev. 1.0
After receiving products, inspect all parts for possible deformity or malfunction.
3-3 Inspecting Components of an AC Module
12
AC Module
1. DC module
converts the solar energy to DC power.
2. Micro Inverter
converts DC power generated by each PV
module to AC power.
3. AC module frame
is a structural system to protect and support
a DC module and a micro Inverter.
4. AC Cable Male Connector
can be connected with an AC cable female
connector or a female end cap.
5. AC Cable Female Connector
can be connected with an AC cable male
connector or a female end cap.
6. AC Cable Male Connector Holder
holds the cable preventing it from getting free.
7. AC Cable Female Connector Holder
holds the cable preventing it from getting free.
8. Product Label
indicates product specification and MAC ID
number.
9. Detachable MAC ID
is for a customer to place it on a map for
record.
10. Model number
represents its model number.
Accessory
(Contact to distributor for order)
11. Extension Cable (serviceable as a transition
cable)
has both of female/male connectors paired
with male/female end cap.
12. Male Connector
can be used for connection with a female
connector or a female end cap.
13. Female Connector
can be used for connection with a male
connector or a male end cap.
14. Female End Cap
is for sealing a male connector.
15. Male End Cap
is for sealing a female connector.
16. Unlocking Tool
for handling male and female connectors.
Copyright © 2017 LG Electronics.
All Rights Reserved.
⑪
⑯
⑬
⑫
⑮
⑭
①
②
③
⑤④
⑥
⑦
⑧
⑨⑩

AC Module System Installation Manual
Rev. 1.0
After completing the installation of AC module on the rooftop or other site, next step is to install the communication
gateway(EnerBox2) which enables home owners and installers to monitor power production of individual AC module or
the entire array on a daily, monthly or an annual basis. The communication system is simple to connect the gateway with
each micro inverter and an internet router. Power Line Communication (PLC) method facilitates communication between
the gateway and each micro inverter. Then the gateway collecting energy and performance data from the AC modules in
real time transmits the accumulated log data to a web server through an internet router.
3-4 Inspecting Components of EnerBox2
EnerBox2 power cable LAN cable
13
EnerBox2
Wi-Fi Antenna
Copyright © 2017 LG Electronics.
All Rights Reserved.
EnerBox2 (Gateway)
(Contact to distributor for order)
1. EnerBox2
is to collect energy harvest volume data
from installed AC modules.
2. Wi-Fi antenna
is attached on the body of EnerBox2 for
wireless connection of an EnerBox2 to a
router(It needs to be already installed at
home owner’s shelter). A router is not
provided by LG Electronics.
3. EnerBox2 left-side
provides many functions including reset,
buttons, LEDs, and etc.
4. EnerBox2 bottom-side
provides slots for power cable, LAN cable
and USBs.
5. EnerBox2 power cable
is used to provide power to EnerBox2 for
operation.
6. LAN Cable
is accessible for a case that wireless service
is not provided by a router.
7. Wall mount bracket
can be used for the EnerBox2 to be installed
on a wall.
8. Wall mount bracket screws
hold the wall mount bracket on a wall.
EnerBox2 left-side
EnerBox2 bottom-side
①
②
③
⑤
④
⑥Wall mount bracket Wall mount bracket screws
⑦⑧

AC Module System Installation Manual
Rev. 1.0
Below is a sample diagram of the AC module system.
1. AC module
- Consists of aDC module and a micro inverter.
- Performs power conversion from solar power to AC power and maximizes power generation
by performing MPPT (Maximum Power Point Tracking).
2. EnerBox2 (Communication Gateway)
- Collects data from the installed AC module system via AC cable.
- Uses wireless connection to transmit data to a server.
3. Monitoring App
- Monitors how much power is produced by the AC module system.
- Transmits the condition of the system to the service center in case of a problem.
3-5 Wiring Diagram of AC Module System
14
•PV rack: Structure used to attach AC modules on surfaces like roofs, empty plots etc
•AC junction box: Container for electrical connections of AC cables.
•Distribution panel : Component of an electricity supply system which divides an electrical power feed into
subsidiary circuits, while providing a protective fuse or circuit breaker for each circuit, in a common enclosure
Copyright © 2017 LG Electronics.
All Rights Reserved.
PV Rack AC Junction Box
Transition Cable (transformed
from an extension cable)
General AC Cable
Equipment
Grounding
Conductor
EnerBox2
Distribution Panel
AC Module AC Cable
2-pole
20A
Meter
N L1 L2 G

AC Module System Installation Manual
Rev. 1.0
Before Installing the AC junction box and PV rack, be aware of the following requirements:
•Determine appropriate solar panel angle maximizing the amount of sunlight. It depends on geographical
conditions.
•To make better air circulation along the backside of the AC module, it is recommended to install the PV
rack with a gap of at least 4 inches (100mm) between the back of the module and roof surface. It might
affect UL listing and fire class if it is less than 4 inches (100mm).
•Install AC junction box near the AC module.
•Install using the parts approved in the installation region.
Construct the overall frame of the solar system in the following order:
•Install the PV rack according to the number of modules per array and the dimensions of the AC module.
(refer to Chapter 9. Product Specification)
•Inspect the installation site and design possible combination of arrays that fits into the installation site. If
there are any vents or obstacles that make array build difficult, go to 3-9 Building an array of AC modules
to get ideas to design an array.
•Install the AC junction box near the PV rack. Select the size and type of AC junction box suitable for
connection type according to the output voltage. (refer to 3-12 Connecting Array of AC Modules-to-
Distribution Panel)
•Make sure that the AC junction box is under protection of weather proof function.
•Please use appropriate conduit or ducts for wires.
3-6 Installing the AC Junction Box and PV Rack
Operation temperature
Maximum operation temperature: 65°C (149°F).
Minimum operation temperature: -40°C (-40°F).
Design strength
Refer to Appendix 2 –Module Installation & Load Guide
PV module specification (conditions of 1000W/m2irradiance and 25°C (77°F) solar cell temperature)
Notes
-LG AC module should not be operated in locations where direct contact to salt water or ammonia exists.
15
Copyright © 2017 LG Electronics.
All Rights Reserved.
All of procedures should be carried out by qualified installers. LG Electronics does not provide
warranty for PV racks and the AC junction box.
PV racks
AC Junction Box

AC Module System Installation Manual
Rev. 1.0
Before mounting AC module in the PV rack, be aware of the following requirements:
•Check that all parts of the product are intact and operational.
•Check that the cable connectors are not damaged.
•Do not install the AC modules horizontally. It will make difficult for dust to be washed off by rain naturally.
Accumulation of dust, dirt or soil may be a cause of performance degradation.
•When installed on a roof, the PV module must be mounted over a fire-resistant roof. The fire resistance of
the PV module is class C according to ANSI/UL790.
•For proper operation, do not remove AC module frame or replace with another frame.
•Do not make extra holes on the AC module frame. Additional holes on the frame may weaken the
strength of the frame and cause damage finally.
•To avoid the tensile strain from the thermal expansion, it is recommended to leave a space more than
6mm (0.236 inches) between AC modules frames.
•Mount LG AC module to PV rack with 4~5N•m torque.
•For reliable connection, make sure that the AC module frame and a PV rack are surely fastened enough to
prevent the AC modules from getting loose.
•When installing modules in areas of heavy snow, special care should be taken to install the modules in a
manner that provides sufficient strength for meeting local code requirements.
3-7 Mounting the AC module
16
Copyright © 2017 LG Electronics.
All Rights Reserved.
AC Modules
AC Junction Box
Guides for mounting AC modules on the PV racks are explained from next page.
•When an AC module is exposed to light, it supplies a dc voltage to a micro inverter.
Therefore, the LED on the micro inverter will illuminates in red with a condition that it is
not connected to the grid.
• To prevent the danger of the electric shock, do not touch metal parts inside the AC cable connectors.

AC Module System Installation Manual
Rev. 1.0
Mount AC module to the PV rack in the following order:
•Bolting type uses manufactured holes on the AC module frames to attach the AC modules on PV rack or support
structure. Use at least 4 mounting holes (2 on right and 2on left frame) to securely hold the AC modules on the
structure. This mounting type is tested by UL.
•The AC module can be mounted by using clamps or fixing plates. Steps and procedures need to be carried out based
on a manual provided by the clamp or fixing plate manufactures. The type is evaluated by LG internal test, not tested
by UL.
•Bolts, clamps or fixing plats must be installed according to the manufacturer’s specific instructions.
•Do not apply too much pressure on the AC module frame to a degree that the frame deforms.
•Please follow instructions and manuals specified by bolt, clamp or fixing plate manufactures.
•Make sure that any clamps or fixing plates do not contact the front glass and do not deform the frame. Also, be sure
to avoid shadowing effects caused by the clamps or fixing plates.
•It is recommended to check with local authorities for fire safety guidelines and requirements for any buildings or
structures on to which the panels will be installed.
Connection of the PV Rack and AC module
•To prevent the danger of the electric shock, do not attach or connect AC modules to the grid before
the installation.
•The actual grid connection should be done after all of installation procedures are completed.
AC module frame clamps for an example
Bolting type
Clamp or fixing plate type
17
Copyright © 2017 LG Electronics.
All Rights Reserved.
•Bolting Type is tested by UL. Refer to Appendix 2.
•Clamp or fixing plate type is not tested by UL. The type is evaluated by LG internal test.

AC Module System Installation Manual
Rev. 1.0
60 cell ①: 200mm(7.9 in)
②: 300mm(11.8 in)
※ This mounting method is by using frame bolt holes.
※ Please refer to Appendix 2 –Module Installation & Load Guide.
Mount AC module to the PV rack in the following order:
•Place AC modules on the PV rack with a minimum gap of 6mm (0.236 inches) between each module. To
prevent the risk of slipping during installation, mount AC modules one by one.
•Peel the adhesive label attached on the side of AC module frame and attach the identification label on LG
AC module Installation map. The map makes it easy for customers to identify the physical location of a
particular AC module. Each AC module has two MAC ID label. One is placed under the product
specification label. And the other is the detachable MAC ID label.
•The layout of the array will be utilized for building a monitoring system allowing a customer to check the
amount of energy harvest.
•The AC modules can be mounted in landscape or portrait orientation, as illustrated below.
•When the AC module is mounted on aPV rack rail, ensure that the rail is inside the range specified in
Appendix 2 –Module Installation & Load Guide. The range is varied depending on mounting methods.
•Appendix 2 guides you how to place PV rack rails and clamps in connection with AC modules.
Design Strength(Basic Load)
18
Copyright © 2017 LG Electronics.
All Rights Reserved.
•60Cell Modules : 75lb/ft2
•Detail of mounting distance is below.
②
②
②
②
•To prevent the risk of accidents, use proper PPE (Personnel Protective Equipment) including
helmets and globes at all times.
•If installation location is high above ground, make sure to use Fall Protection System during
the installation.

AC Module System Installation Manual
Rev. 1.0
Portrait Orientation
19
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All Rights Reserved.
Landscape Orientation
•After checking whether paring male and female connectors between modules (except end
cap and junction box connection) are surely finished, proceed to install next row of modules.
•All of AC cable connectors must be installed underneath the module, out of rain and sun. Do
not leave AC cable connectors in an environment of long-term exposure to direct sunlight or
rain.
270 mm
10.63 inch
400 mm
15.75 inch
270 mm
10.63 inch
400 mm
15.75 inch
120 mm
4.72 inch
120 mm
4.72 inch
120 mm
4.72 inch
120 mm
4.72 inch

AC Module System Installation Manual
Rev. 1.0 20
LED indicator
Flashing red light => No red light
•Solar panel is getting solar energy but it is not providing power to utility grid. (Left figure)
•Solar panel is getting solar energy and it is providing power to utility grid. (Right figure)
•Connection time is set with 1min. After you turn the circuit breaker on for the actual utility
connection, the micro inverter will be in operation to provide power to the grid.
•Reconnection time is set with 5 min. Reconnection time is applied if the micro inverter is
tripped with grid voltage and frequency abnormality. For example, if the circuit breaker is
turned off during operation, the reconnection time 5 min. will be applied. Once it starts power
production, connection time 1 min. will be applied.
•After connection time or reconnection time, the micro inverter will transform DC power to AC
power for utility grid.
1. At night, the LED has no light because there is no energy to
make the LED illuminate.
2. At daytime, the LED will light in flashing red when the PV panel
is getting solar energy as well as the micro inverter is not
providing power to grid. However, it will turn in no red light if it
generates AC power to a utility grid.
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•If the installation is likely to be affected by heavy(extreme) snow, further suitable panel
support is recommended on the lower row of panels.
•Ensure that the micro inverters are not interfered by the PV racks, ventilation structures. Do
not allow any structure to pressure on micro inverters. Continuous stress or force might be
a cause of malfunction.