LG LGXXXA1C-V5 Installation Manual

Life’s Good

AC Module System

Installation Manual

LGXXXA1C-V5

Important! Please read the AC Module System Installation Manual before installing, wiring, or using this product in any way. Failure to comply with these instructions may invalidate the Warranty.

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AC Module System Installation Manual

This AC Module System Installation Manual (“Manual”) may contain inaccuracies and/or typographical errors and may be changed or updated at any time by LG Electronics (“LGE”) without notice.

Please read the Manual before installing, wiring, or using this Product in any way. Failure to comply with the instructions outlined in the Manual may void the Product’s limited warranty.

Should you have any questions, you may contact LGE at [e-mail] before starting the installation process.

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AC Module System Installation Manual

Contents

1 Safety	6
1-1 Safety Symbol	6
1-2 Circuit Symbol	6
1-3 Important Safety Instructions	7
1-4 FCC Guidelines	9

2 Introduction	10
3 Installation	11
3-1 Instructions before Installation	11
3-2 Checking the Installation Site	12
3-3 Inspecting Components of an AC Module	13
3-4 Inspecting Components of EnerBox2	14
3-5 Wiring Diagram of AC Module System	15
3-6 Installing the AC Junction Box and PV Rack	16
3-7 Mounting the AC module	17
3-8 Coupling AC cable Connectors	22
3-9 Building an Array of AC modules	24
3-10 Building Blocks of an Array	26
3-11 Grounding	35
3-12 Connecting Array of AC Modules to Distribution Panel	38
3-13 Grid Voltage Measurement	45
3-14 Grid Frequency Measurement	46
3-15 Energizing the Installed AC Module System	47

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Contents

4 Communication		48
4-1 EnerBox2 Components		49
4-2SimpleDiagramforCommunicationSystemConfiguration		49
4-3	EnerBox2 installation procedure	50
4-4	EnerVu2 Monitoring system (Installer account)	64
4-5 EnerVu2 Monitoring system (Homeowner account)		71
4-6	EnerVu2 Mobile Monitoring Application (Installer account)	73
4-7 EnerVu2 Mobile Monitoring Application (Homeowner account)		76

5 Troubleshooting Guide	80
5-1 EnerBox2 Inspection	80
5-2 Replacing an EnerBox2	81
5-3 Check the PLC Level	83
5-4 Microinverter Detection Issues	84
5-5 Internet Connection Issues	86
5-6 Microinverter Operation Issues	88
5-7 Grid Voltage Measurement	91
5-8 Grid Frequency Measurement	92

6 Event List and Description	93
6-1 EnerBox2 Displays and Controls	93
6-2 Web Monitoring System Event List	95

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AC Module System Installation Manual

Contents

7 Maintenance		97
8 Accessories		98
9 Product Specifications		100
9-1 AC module , LGXXXA1C-V5		100
9-2 AC Cables		102
9-3 EnerBox2		103
10 Warranty		104
11 Transportation and Storage		104
12 Contact		104
Appendix 1	–AC module Installation Map	105
Appendix 2	– Module Installation & Load Guide	106
Appendix 3	– Alternative Equipment Grounding Devices	107

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’

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AC Module System Installation Manual

1 Safety

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.

1-1 Safety Symbol

Safety symbols are used to prevent property losses and human life damages during the operation of this equipment.

Safety Symbol	Description
	Failure to comply with the instructions may cause severe injury or immediate death.
	Failure to comply with the instructions may cause severe injury or death.
	Failure to comply with the instructions may cause injury or property damage.
	Failure to comply with the instructions may cause severe injury or immediate death
	by electricity.
	Failure to comply with the instructions may cause injury or property damage by fire.

1-2 Circuit 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 microinverter. Used in electric
								appliances.
								Symbol representing the phase of AC current.
								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.

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1-3 Important Safety Instructions

•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 arcing, do not disconnect the cable connector while 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.

•Forsafety,onlyqualifiedpersonnelwithpropertrainingandcertificationsshouldservicemodules.

•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.

•Removing the microinverter cover may void the warranty. 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 LG parts or parts that are supplied by LG may cause critical danger.

•For proper operation, the AC module must be connected 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 requirements for proper and safe installation.

•Perform all work in dry conditions and use only dry tools. Do not handle wet panels without appropriate protective equipment.

•Damaged modules must be treated with the appropriate protective equipment.

•Do not approach the damaged or broken module unless you are an authorized or qualified personnel.

•Waste, electrical parts, bolts, nuts, conductors or any other debris must be cleared after installation.

•Do not bend AC cables. While under stress, it may cause module damage. Cable bending radius should be more than 5 times the cable diameter, at least.

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•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 rainy or snowy days, electric shock hazard exists. On windy days, it may be dangerous to move the AC modules.

•To prevent the risk of injury, do not apply pressure to 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 microinverter 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 parts, as it can damage the AC Module.

•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 coveringmustmeettherequirementstoachievethespecifiedSystemFireClassRatingforanon-BIPV module or panel.

•For 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 may 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 Section

9 Product Specifications.

•Wheninstalledonaroof,thePVmodulemustbemountedoverafire-resistantroof.Thefireresistance 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.

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AC Module System Installation Manual

1-4 FCC Guidelines

For Microinverter & Communication Gateway (EnerBox2)

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 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.

For Communication Gateway (EnerBox2)

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:RegulationsoftheFCCandFAAprohibitairborneoperationofradio-frequencywirelessdevices because their signals could interfere with critical aircraft instruments.

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2 Introduction

The LG AC module consists of a DC module and a microinverter. Without any 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 Advantage of AC Module System

The AC module produced by LG Electronics is delivered with the microinverter pre-installed on the DC module, which eliminates installation steps to connect the microinverter to a DC module.

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 requiring any trunk cables.

The advantages reduce total and labor costs.

AC Module System

Indicator Flow

Power flow

PLC signal

Wireless communication

1.AC Module

2.Communication Gateway

3. Monitoring App

In this diagram, AC modules will produce power during daytime. The produced energy can be consumed by home appliances like a fridge, TVs, etc. If the power generation is more than total power consumption in the house, the power should flow to the grid. Power flow is described as.

The EnerBox2 utilizes power line communication (PLC) to collect data from each AC module. The PLC matters for communication between microinverters 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 .

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3 Installation

3-1 Instructions before Installation

•LG AC module is a “Grid Support Utility Interactive Inverter”, which requires approval from the corresponding authority prior to connection with the utility grid. Contact the applicable local government agencies and/or utility company.

•Installation, maintenance, and supervision may only be carried out by a qualified and authorized installer to ensure 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.

•If it is necessary to use an installation method which is not specified in the installation manual, pleasecontactLGElectronics.Failuretocomplymayvoidthewarrantyandthemodulecertificate.

•After arrival of AC modules, check for possible damage during transportation. Damaged modules should not be installed. Request an exchange by contacting LG Electronics.

•Secure all necessary permits and licenses to install the solar modules.

•Store the AC modules in original packing before installation.

•Keep the AC modules in a 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 of at least 2 persons for safe installation.

•To prevent the risk of accidents, use proper PPE (Personal Protective Equipment) including helmets and gloves 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. A buildup of dirt may cause 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.

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3-2 Checking the Installation Site

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°F).

•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 the 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.

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AC Module System Installation Manual

3-3 Inspecting Components of an AC Module

After receiving products, inspect all parts for possible deformity or malfunction.

9

10

3

2

8

5

1

4

7

6

AC Module

1.DC Module

converts the solar energy to DC power.

2.Microinverter

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 microinverter.

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 male 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

indicatesproductspecificationandMACIDnumber.

9.Detachable MAC ID

is for a customer to place it on a map for record.

10.Model number

represents its model number.

11

16

12

14

Accessory

(Contact distributor to order)

11.Extension Cable (serviceable as a transition cable) has both 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

13	is for sealing a male connector.

15.Male End Cap

is for sealing a female connector.

15	16. Unlocking Tool

for handling male and female connectors.

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3-4 Inspecting Components of EnerBox2

After completing the installation of AC module on the rooftop or other site, next step is to install the communication gateway (EnerBox2) which enables homeowners and installers to monitor power production of individual AC module or the entire array on a daily, monthly or annual basis. The communication system is simple to connect the gateway with each microinverter and an internet router. Power Line Communication (PLC) method facilitates communication between the gateway and each microinverter, 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.

Wi-Fi Antenna 2

EnerBox2 (Gateway)

(Contact distributor to order)

1. EnerBox2

is to collect energy harvest volume data from installed AC modules.

1	2. Wi-Fi antenna

is attached on the body of EnerBox2 for wireless connection of an EnerBox2 to a homeowner’s existing router. A router is not provided by LG Electronics.

EnerBox2

3 EnerBox2 left-side

4 EnerBox2 bottom-side

3.EnerBox2 left-side

provides many functions including reset, buttons, LEDs, 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

to connect the router in case 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.

5 EnerBox2 power cable	6 Lan Cable	7 Wall mount bracket	8 Wall mount bracket screws
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AC Module System Installation Manual

3-5 Wiring Diagram of AC Module System

Below is a sample diagram of the AC module system.

			Transition Cable (transformed
			from an extension cable)
PV Rack	AC Module	AC Cable	ACJunction Box

Equipment	General AC Wiriing
Grounding
Conductor
	Meter

EnerBox2	2-pole
	20A

N L1 L2 G

Distribution panel

1.AC module

-Consists of a DC module and a microinverter.

-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.

•PV rack: Structure used to attach AC modules on surfaces like roofs, empty plots, etc.

•AC junction box: Container for electrical connections of AC wiring.

•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.

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3-6 Installing the AC Junction Box and PV Rack

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. This 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 Chapter9.ProductSpecification)

•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 protected by weatherproofing materials or substances.

•Please use appropriate conduit or ducts for wires.

PV Racks

AC Junction Box

All procedures should be carried out by qualified installers. LG Electronics does not provide or cover warranties for PV racks and the AC junction box.

PV module specification (conditions of 1000W/m2 irradiance and 25°C (77°F) solar cell temperature)

Operation temperature

Maximum operation temperature: 65°C (149°F).

Minimum operation temperature: -40°C (-40°F).

Design strength

Refer to Appendix 2–ModuleInstallation & Load Guide

Notes

-LG AC module should not be operated in locations where direct contact to salt water or ammonia exists.

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3-7 Mounting the AC module

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 it 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.

•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.

AC Modules

AC Junction Box

Guides for mounting AC modules on the PV racks are explained on the following pages.

•When an AC module is exposed to light, it supplies a DC voltage to a microinverter. Therefore, the LED on the microinverter will illuminate in red if it is not connected to the grid.

• To prevent the danger of electric shock, do not touch metal parts inside the AC cable connectors.

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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 2 on left frame) to securely hold the AC modules on the structure.This mounting type is tested by a Nationally-RecognizedTesting Laboratory.

•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 manufacturers.The type is evaluated by LG internal test, not tested by a Nationally-RecognizedTesting Laboratory.

•Bolts, clamps or fixing plates 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 manufacturers.

•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 onto which the panels will be installed.

Bolting type

Connection of the PV Rack and AC module

Clamp or fixing plate type

AC module frame clamps for an example

•BoltingType is tested by a Nationally-RecognizedTesting Laboratory. Refer to Appendix 2.

•Clamp or fixing plate type is not tested by a Nationally-RecognizedTesting Laboratory.The type is evaluated by LG internal test.

•To prevent the danger of electric shock, do not attach or connect AC modules to the grid before the installation.

•The actual grid connection should be done after all installation procedures are completed.

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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 MACID labels. 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 harvested.

•The AC modules can be mounted in landscape or portrait orientation, as illustrated below.

•When the AC module is mounted on a PV rack rail, ensure that the rail is inside the range specified in Appendix 2–

Module Installation & Load Guide. The range varies 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)

•60Cell Modules: 75lb/ft2

•Detail of mounting distance is below.

2

	2	: 200mm (7.9 in)
		60 cell
2		: 300mm (11.8 in)

1

2

1

This mounting method uses frame bolt holes.

Please refer to Appendix 2 –Module Installation & Load Guide.

•To prevent the risk of accidents, use proper PPE (Personal Protective Equipment) including helmets and gloves at all times.

•If installation location is high above ground, make sure to use Fall Protection System during the installation.

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Electronics	AC Module System Installation Manual
Portrait Orientation

Landscape Orientation

<![if ! IE]>

<![endif]>mm 400 mm 270 mm 400 mm 270 inch 75.15 inch 63.10 inch 75.15 inch 63.10

120 mm		120 mm
4.72 inch		4.72 inch

120 mm		120 mm
4.72 inch		4.72 inch

•Check whether the male and female connectors between modules (except end cap and junction box connection) are securely connected, then proceed to install next row of modules.

•All 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.

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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.

LED indicator

Flashing red light: Solar panel is getting solar energy but it is not providing power to utility grid.

No red light: Solar panel is getting solar energy and it is providing power to utility grid.

•Connection time is set at 1min. After you turn the circuit breaker on for the actual utility connection, the microinverter will be in operation to provide power to the grid.

•Reconnection time is set at 5 min. Reconnection time is applied if the microinverter is tripped with grid voltage and frequency abnormality. For example, if the circuit breaker is turned

off during operation, the reconnection time of 5 min. will be applied. Once it starts power production, connection of 1 min. will be applied.

•After connection time or reconnection time, the microinverter will transform DC power to AC power for utility grid.

1.At night, the LED will have no light because there is no energy to make the LED illuminate.

2.During daytime, the LED will blink flashing red when the PV panel is getting solar energy but the microinverter is not providing power to grid. However, there will be no red light if it generates AC power to a utility grid.

•Ensure that the microinverters are not interfered by the PV racks or ventilation structures. Do not allow any structure to put pressure on microinverters. Continuous stress or force might cause of malfunction.

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3-8 Coupling AC cable Connectors

Before pairing AC cable connectors, familiarize yourself with the following descriptions specifically explaining how to handle AC cable connectors and accessories.

AC cable connector insertion

•AC cable connectors can be easily paired to connectors in the right direction.

•Before pairing two AC cable connectors, identify the locations of ‘Fool-proof system’ on each AC cable connector.

•Inserting the AC cable female connector into the AC cable male connector is only possible when ‘Fool-proof

System’ is properly matched.

• Use fool-proof system 1 or 2 as per your convenience.

Fool-proof System 2

M	F
Fool-proof System 1

• Insert the AC cable female connector into the AC cable male connector horizontally. If you insert at the wrong angle, the connector can be damaged.

• When the temperature is warm and you are about to engage two connectors, you might not hear two clicks. In that case, engage connectors until there is no space (no gap) between connectors.

• Insert the connector fully into the end of the other connector until you hear two clicks.

• When the connectors are correctly connected, there should be no space between the end of a male connector and

the end of a female connector.

No gap

•Do not let cable be pulled too tight or hang too loose. Internal conductor may break.

•Do not allow any liquid inside to prevent danger of electric shock.

•Do not use damaged cables.

•Do not cut or transform AC cables for use.

•Frequent disassembly or connection may damage connectors.

•The size of the cables are in accordance with NEC2014. (For the size, refer to Chapter 9. Product Specification)

•For information about accessories, refer to Chapter 8. Accessories.

•AC cable information can be found in Chapter 8 AC Module Accessories.

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•Do not bend the cable too many times. It may result in mechanical and/or electrical problems.

•Do not disconnect AC cable connectors under load.

•Use the dedicated unlocking tool to remove the connector. Do not use any other tools.

•The unlocking tool is specifically made for disconnecting the two AC cable connectors.

•The male and female connectors will be opened by fully depressing the unlocking tool into the latches.

•After the unlocking tool insertion is complete, pull the connectors apart.

AC Cable Connector removal			Unlocking Tool

Pull

•Avoid any external equipment interfering with the connector.

•Do not impose force on the side of the connector.

•Do not apply too much force pulling AC cables away from the connectors or the microinverter.

•The cable must not be bent, crushed or pinched where the cable connects to screw joint.

•The cable must be routed in a way that tensile stress on the conductor or connections is prevented.

•A minimum bending radius of 55mm must be maintained.

R

•Do not attempt to assemble connectors in wet, soiled, or dusty environment.

•Keep connectors dry and clean, and ensure that connectors have no damage or deformities.

•Avoid connectors resting on the ground or roof surface. AC cables should be kept away from the ground or roof surface. Use proper tools like cable clips for securely attaching AC cables on structures like PV racks.

•Avoid sunlight exposure and water immersion of the connectors.

•Incomplete connections can result in arcs and electrical shock.

•Check that all AC cables are securely fastened to structures.

•Ensure that all locking connectors are fully engaged and locked.

•Do not leave unconnected (unprotected) connectors exposed to the environment. Use appropriate end caps for the unconnected AC cable connectors.

•To prevent the danger of electric shock, make sure to turn off the circuit breaker before the installation.

•Do not disconnect AC cable connectors under load.

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3-9 Building an Array of AC modules

•Remove the tape securing the AC cables and connectors to the back of the module.

•Each AC module has an AC cable male connector and an AC cable female connector.

•AC cable female connector is located on the left at rear side, or the right at front side.

•AC cable male connector is placed on the right at rear side, or left at front side.

•For easy recognition of the position, the below represents the location of the female connector and thestands for the location of the male connector.

•Because male connector is designed to be connected with a female connector or female end cap, there is a need to keep track of the positions of male and female connectors when you build an array.

•The AC module produced by LG Electronics is delivered with the microinverter pre-installed on the DC module.

•Therefore, it eliminates installation steps for pairing DC module outputs and microinverter inputs.

•The length of the AC cables are designed to enable easy cable links throughout an array you have designed.

•Landscape, portrait or a combination of both is possible with the AC cable connectors.

•Even if there are roof vents on the target site, AC cable connection is feasible for the AC module array to circumvent the vent area.

F M

	Male	AC Cable Female Connector
	End Cap

F Position of the female connector

AC Cable Male Connector	Female
	End Cap

M Position of the male connector

The end caps are not attached on the above AC cable connectors. Male or female end caps are provided with extension cables. This diagram is for showing that each end cap has its pair.

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•Do not expose the cable connections to directed, pressurized liquid (water jets, etc.).

•Do not expose the cable connections to continuous immersion.

•Do not expose the AC cable connector to continuous tension.

•Use only the connectors and cables provided by LG Electronics.

•Do not allow contamination or debris inside the connectors.

•Use cables and connectors only when all parts are present and intact.

•All 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.

•Ensure that the microinverters are not interfered by the PV racks, ventilation structures. Do not allow any structure to put pressure on microinverters. Continuous stress or force may cause malfunction.

•Attach the AC Cable to the PV racks using the cable clips. Keep the AC cables away from the ground surface or the roof.

•After checking whether pairing male and female connectors between modules (except end cap and junction box connection) are securely connected, proceed to install next row of modules.

•Seal the last AC cable connector with an appropriate end cap to add the waterproof function. Insert the end cap into the male or female connector in the arrow direction until you hear a click sound or find no gap at the edge. (Refer to the 3-8 Coupling AC cable connectors). End caps are attached on each extension cable that you have ordered.

-AC cable connector and end cap include waterproof functions.

•Make sure to use AC cables, extension cables and end caps provided by LG. If cables other than genuine are used, waterproofing may not be guaranteed and the permissible current of the cable may be lower than the output current of the microinverter.

•To prevent the danger of electric shock, firmly connect all connectors and end caps.

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3-10 Building Blocks of an Array

6 Building Blocks

Male connector Female connector

•There are 6 building blocks of AC modules which can be used in building an array. Using the 6 building blocks helps installers sketch array configuration and plan the AC cable connection.The designer needs to keep in mind that the location of female and male connectors will affect array design.

•Each building block has a limitation on the space between two AC modules because of cable length. Therefore, the space gap between two AC module frames must be kept under the value specified in each building block.

•Also, to avoid tensile strain from thermal expansion, it is recommended to leave a space more than 6 mm (0.236 inches) between AC module frames.

•This manual provides gap limitation between AC module frames for each building block. After male and female connection of two AC modules, use cable clips in order to fasten the AC cables on frames or PV racks.

•Keep the AC cables off the roof surface or ground.

•In brief, simple diagrams indicate different types of building blocks describing location of male and female connectors and gap limitation between AC module frames. So do not interpret the simple diagrams as the AC cables must make path only to the top direction from an AC module.

•In cases of portrait in reverse and landscape in common, AC cables run below the microinverter to meet another AC cable. Keep in mind to fasten the AC cables on frames or PV racks in order to keep them off of the roof surface.

Portrait in common

						<1000mm
	<300mm
						<39.37 inch
	<11.81 inch
					<50mm			<50mm
					<1.95 inch			<1.95 inch

Portrait in reverse

<50mm			<50mm
<1.95 inch			<1.95 inch

Landscape in common

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Fastening AC cables on PV racks or AC module frames

•Use cable clips in order to fasten the AC cables on AC module frames or PV racks.

•Keep the AC cables off of roof surface or ground.

•For cases of portrait in reverse or landscape in common, steps are described to recommend to fasten AC cables on AC module frames and PV racks.

For portrait in reverse or landscape in common:

A.Get the AC cable paired.

B.Use a mounting hole with a cable clip for fastening the AC cable on the AC module frame. Mounting holes are placed in red dots as displayed in the rear side of an AC module.

C.Attach another AC cable on near PV racks.

Location of mounting hole

Cable Management Clip

Location of grounding hole

Mounting holes can be used for cable clip

	C
B
A
	A
C	B
Portrait in reverse	Landscape in common

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Possible combination of AC modules for array design

Male connector

If AC junction box is on the right side of a 3-by-4 PV array in portrait orientation,

Female connector

Use proper transition cable for connecting the array with the AC junction box. (Refer to 3-12 Connecting Array of AC Modules-to-Distribution Panel guiding installers to make a transition cable from an extension cable) Seal the AC cable male or female connectors of the last AC module using an appropriate end cap. End caps can be found in an extension cable.

If AC junction box is on the left side of a 3-by-4 PV array in portrait orientation,

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Possible combination of AC modules for array design

Male connector

If AC junction box is on the right side of a 3-by-4 PV array in landscape orientation,

Female connector

Use proper transition cable for connecting the array with AC junction box. (Refer to 3-12 Connecting Array of AC Modules-to-Distribution Panel guiding installers to make a transition cable from an extension cable) Seal the AC cable male or female connector of the last AC module using an appropriate end cap. End caps can be found in an extension cable.

If AC junction box is on the left of a 3-by-4 PV array in landscape orientation,

Requirement for the landscape formation.

Unlike a connection in a portrait orientation, two AC modules in a landscape orientaion must be placed with a gap of at least 6mm (0.24 inch) and no more than 50mm (1.95 inch). Otherwise, the length of the AC cables is not enough for male and female connectors to be fully connected.

<50mm	<50mm
<1.95 inch	<1.95 inch

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Possible combination of AC modules for array design

Male connector

If AC junction box is on the right side of a 2-by-6 PV array in portrait orientation,

Female connector

Use proper transition cable for connecting the array with AC junction box. (Refer to 3-12 Connecting Array of AC Modules-to-Distribution Panel guiding installers to make a transition cable from an extension cable) Seal the AC cable male or female connector of the last AC module using an appropriate end cap. End caps can be found in an extension cable.

If AC junction box is on the left of a 2-by-6 PV array in portrait orientation,

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