INVT XG3-10KTL User manual

User Manual
XG3-10KTL Grid-tied Solar Inverter
INVT Solar Technology (Shenzhen) Co., Ltd.

i
Preface
The manual is intended to provide detailed information of product, installation, application, trouble
shooting, precautions and maintenance of iMars series grid-tied solar inverter. The manual does not
contain all the information of photovoltaic system. Please read this manual carefully and follow all safety
precautions seriously before any moving, installation, operation and maintenance to ensure correct use
and high performance of operation on the inverter.
The use of the iMars series grid-tied solar inverters must comply with local laws and regulations on
grid-tied power generation.
The manual needs to be kept well and be available at all times.
All rights reserved. The contents in this document are subject to change without notice.
There might be some deviations on actual inverter and data due to product updating, please refer to
the actual product.

Grid-tied single-phase solar inverter Contents
ii
Contents
Preface ............................................................................................................................................................... i
Contents ............................................................................................................................................................ii
1. Safety precautions ......................................................................................................................................... 1
1.1Warning marks ................................................................................................................................................1
1.2 Safety guidance ..............................................................................................................................................2
1.2.1 Transport and installation ..................................................................................................................... 3
1.2.2 Grid-connected operation .....................................................................................................................3
1.2.3 Maintenance and inspection .................................................................................................................4
1.2.4 Waste disposal ...................................................................................................................................... 4
2 Product overview ............................................................................................................................................5
2.1 PV grid-connected power generation system ................................................................................................ 5
2.2 Product appearance .......................................................................................................................................6
2.3 Nameplate description ...................................................................................................................................7
2.4 Product model ............................................................................................................................................... 8
2.5 Outline dimension and weight ....................................................................................................................... 9
2.6 The LED light panel ...................................................................................................................................... 10
2.6.1 The LED light panel ..............................................................................................................................10
2.6.2 LCD operation panel ............................................................................................................................11
2.7 Bottom of the inverter ................................................................................................................................. 12
3 Inverter storage ............................................................................................................................................ 13
4 Installation ....................................................................................................................................................14
4.1 Unpacking confirmation ...............................................................................................................................14
4.2 Prepare before installation .......................................................................................................................... 16
4.2.1 Installation tool ................................................................................................................................... 16
4.2.2 Installation environment .....................................................................................................................16
4.3 Space requirements ..................................................................................................................................... 17
4.4 Mounting board size .................................................................................................................................... 18
4.5 Wall installation ........................................................................................................................................... 19
4.6 Install the inverter ........................................................................................................................................19
5 Electrical connection .....................................................................................................................................21
5.1 Overview of electrical connections ..............................................................................................................21

Grid-tied single-phase solar inverter Contents
iii
5.2 Connect the protective ground wire ............................................................................................................21
5.3 Connection of PV string ............................................................................................................................... 22
5.4 Connection of DRM & CT ............................................................................................................................. 24
5.5 Single-phase inverter grid access .................................................................................................................25
6 Running ........................................................................................................................................................ 26
6.1 Inspection before running ............................................................................................................................26
6.2 Inverter grid-connected running ..................................................................................................................26
6.3 Inverter stop ................................................................................................................................................ 27
6.4 Daily maintenance and inspection ...............................................................................................................27
6.4.1 Periodic maintenance on the inverter ................................................................................................ 27
6.4.2 Maintenance guidance ........................................................................................................................28
7 Troubleshooting ............................................................................................................................................30
8 Contact information ......................................................................................................................................34
9 Appendix ...................................................................................................................................................... 35

Grid-tied single -phase solar inverter Safety precautions
1
1. Safety precautions
iMars series grid-tied solar inverters are designed and tested strictly in accordance with relevant
international safety standards. As an electrical and electronic device, all relevant safety regulations must
be strictly complied during installation, operation, and maintenance. Incorrect use or misuse may result in：
Injury to the life and personal safety of the operator or other people.
Damage to the inverter or other property belonging to the operator or other people.
In order to avoid personal injury, damage to the inverter or other devices, please strictly observe the
following safety precautions.
This chapter mainly describes various warning symbols in operation manual and provides safety
instructions for the installation, operation, maintenance and use of the iMars series grid-tied solar
inverters.
1.1Warning marks
Warning marks is alerting users to conditions which may cause serious physical injury or death, or
damage to the device. They also tell users how to prevent the dangers. The warning marks used in this
operation manual are shown below:
Mark
Name
Instruction
Abbreviation
Danger
Danger
Serious physical injury or even death may occur if
not follow relevant requirements.
Warning
Warning
Physical injury or damage to the device may occur
if not follow relevant requirements.
Forbid
lectrostatic
sensitive
Damage may occur if relevant requirements are
not followed.
Hot
High
temperature
Do not touch the base of the inverter as it will
become hot.
Note
Note
The procedures taken for ensuring proper
operation.
Note

Grid-tied single -phase solar inverter Safety precautions
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1.2 Safety guidance
After receiving this product, first please confirm the product package is intact. If
any question, please contact the logistic company or local distributor
immediately.
The installation and operation of PV inverter must be carried out by professional
technicians who have received professional training and thoroughly familiar with
all the contents in this manual and the safety requirements of the electrical
system.
Do not carry out cable connection/disconnection, cover open for inspection and
unit replacement operations on the inverter when power is connected. Before
wiring and inspection, users must confirm the breakers on DC and AC side are
disconnected and wait for at least 5 minutes.
Ensure there is no strong electromagnetic interference caused by other
electronic or electrical devices around the installation site.
Do not refit the inverter unless authorized.
All the electrical installation must conform to local and national electrical
standards.
Do not touch the housing of the inverter or the radiator to avoid scald as they
may become hot during operation
Must be reliably grounded before operation.
Do not open the surface cover of the inverter unless authorized. The electronic
components inside the inverter are electrostatic sensitive. Do take proper
anti-electrostatic measures during authorized operation.
Grounding mark. The inverter must be reliably grounded.
Discharging mark. Ensure that DC and AC side circuit breakers have been
disconnected and wait at least 5 minutes before wiring and checking.
Note: Technical personnel who can perform installation, wiring, commissioning,
maintenance, troubleshooting and replacement of the iMars series grid-tied solar inverters
must meet the following requirements:
Operators need professional training.
Operators must read this manual completely and master the related safety precautions.
Operators need to be familiar with the relevant safety regulations for electrical systems.

Grid-tied single -phase solar inverter Safety precautions
3
Operators need to be fully familiar with the composition and operating principle of the entire
grid-tied photovoltaic power generation system and related standards of the
countries/regions in which the project is located.
Operators must wear personal protective equipment.
1.2.1 Transport and installation
During storage or transport, ensure the inverter package and the chassis is intact,
dry and clean.
The movement and installation of the inverter require at least two persons due to
its heavy weight.
Select proper tools for movement and installation to ensure the inverter can
operate normally and avoid physical injury. The installation personnel must take
mechanical protective measures such as wearing anti-drop shoes or working
clothes to protect physical security.
The inverter must be installed by professional technicians.
Do not store or install the inverter on or close to flammable and explosive objects;
Do not install the inverter in the place where children and other public can easily
touch
Remove the metal accessories in hands eg ring or bracelet before device
installation and electrical connection to avoid electric shock.
The solar cell module exposed to the sunlight may generate dangerous voltage.
Users must cover the solar cell with fully-lightproof materials before electrical
connection
The inverter input voltage cannot exceed the max input voltage, otherwise the
inverter may be damaged.
PV grid-connected inverter is not applicable to the positive or negative ground
system of solar cell panel.
Ensure inverter PE is grounded properly, otherwise the inverter cannot run
normally.
Ensure the inverter is installed firmly and electrical wiring is reliable.
Note: PV grid-connected inverter is only suitable for crystalline silicon-type solar battery component.
1.2.2 Grid-connected operation
Permissions by local electric power agency must be obtained and the inverter
grid-connected power generation operation must be done by professional
technicians.
All electrical connections must meet the electrical standards of the

Grid-tied single -phase solar inverter Safety precautions
4
countries/regions in which the project is located.
Ensure the inverter is installed firmly and electrical wiring is reliable before
operating on the inverter.
Do not open the inverter when it is running or connecting power
1.2.3 Maintenance and inspection
The maintenance, inspection and repair of the inverter must be done by well
trained and qualified professional technicians.
Contact distributor or manufacture for inverter repairing.
In order to avoid irrelevant personnel entering the maintenance area during
maintenance, temporary warning labels must be placed to warn non-professionals
to enter or please isolate with fences.
Before carrying out any maintenance operations, users must disconnect the
breaker on grid side, then disconnect the breaker connected to the PV module and
wait at least 5 minutes until the internal parts of the inverter are fully discharged.
The internal of inverter are mostly electrostatic-sensitive circuits and parts, users
must follow electrostatic protection rules and take anti-electrostatic measures.
Do not use components provided by other companies when repairing the inverter.
The inverter can be started again for grid-connected power generation only after
confirming there is no fault that may impact the safety performance of the inverter.
Do not get close to or touch the grid or any metal conductive parts in the PV
power generation system during operation, otherwise electric shock or fire may
occur. Take note of any safety marks and instructions such as “Danger, electric
shock risk”.
1.2.4 Waste disposal
Do not dispose of the inverter together with household waste. The user has the
responsibility and obligation to send it to the designated organization for recycling
and disposal.

Grid-tied single -phase solar inverter Product overview
5
2 Product overview
This chapter mainly introduces the appearance, package accessories, nameplate, technical
parameters of the grid-connected inverter.
2.1 PV grid-connected power generation system
PV grid-connected power generation system is comprised of solar battery component,
grid-connected inverter and public grid.
Fig 2.1 Application of PV grid-connected inverter
The PV grid-connected inverter is the core part of solar PV grid-connected power generation system.
The sunlight can be converted through PV panel to DC power, which further converted by grid-tied
inverter to the sine AC current with the same frequency and phase position as the public grid, then
feedback the AC power to the grid.
The PV grid-tied inverter is only for the solar PV power generation grid-tied system, and only uses
the Crystalline Silicon Solar Cells whose positive and negative electrodes are not grounded as the DC
input.
It is recommended that the PV array to be installed conforms to IEC 61730 class A
standards.

Grid-tied single -phase solar inverter Product overview
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2.2 Product appearance
Figure 2.3 Appearance of the single-phase PV inverter
Table 2-1 Description of key exterior components of single-phase PV inverters
Number
Name
Introduction
1
DC switch
Close/disconnect the PV array
2
DC input interface
Inverter DC input terminal, connected to the PV array
3
Communication
interface
CT,DRM interface
4
RS485-1
485 communication interface
5
AC terminal
Inverter AC output port, connect to public grid
6
Ground terminal
There are two in total, choose at least one of them to
connect
7
LED pilot lamp
Instructions inverter current working condition
8
Nameplate
Mark the inverter rating parameter

Grid-tied single -phase solar inverter Product overview
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2.3 Nameplate description
Figure 2.4 shows the inverter nameplate.
Figure 2.4 Nameplate
（1）Trademarks and product types
（2）Model and important technical parameters
（3）Certification system of the inverter confirming, serial number, company name and country of
origin

Grid-tied single -phase solar inverter Product overview
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Icons
Instruction
TUV certification mark. The inverter is certified by TUV
CE certification mark. The inverter complies with the CE directive
CQC certification mark. The inverter passed CQC certification
EU WEEE mark. The inverter cannot be disposed of as domestic waste
2.4 Product model
Table 2-2 Models of single-phase PV grid-connected inverters
Product name
Model
Rated output power (W)
Single-phase（L、N、PE）
Single-phase PV grid-connected inverter
XG3KTL-2M
3000
Single -phase PV grid-connected inverter
XG4KTL
4000
Single -phase PV grid-connected inverter
XG5KTL
5000
Single -phase PV grid-connected inverter
XG6KTL
6000
Single -phase PV grid-connected inverter
XG7KTL
7000
Single -phase PV grid-connected inverter
XG8KTL
8000
Single -phase PV grid-connected inverter
XG10KTL
10000
Single -phase PV grid-connected inverter
XG7KTL1
7000
Single -phase PV grid-connected inverter
XG8KTL1
8000
Single -phase PV grid-connected inverter
XG10KTL1
10000
Note: Technical parameters of PV grid-connected inverter refer to the appendix.

Grid-tied single -phase solar inverter Product overview
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2.5 Outline dimension and weight
Figure 2.5 Outline dimensions of the inverter
Table 2-3 Dimensions and net weight of the inverter
Model
Height(mm)
Width(mm)
Depth(mm)
Net weight(kg)
XG5KTL
380
380
160
12
XG8KTL
380
380
160
12.6
XG10KTL
380
380
160
13.0
Fig 2.6 Dimension of paper package
Table 2-4 Dimension and gross weight
Model
Height
(mm)
Width
(mm)
Depth
(mm)
Weight
(kg)
Package
material
XG5KTL
465
485
270
14.0
Corrugated
case
XG8KTL
465
485
270
14.6
Corrugated
case
XG10KTL
465
485
270
15.0
Corrugated
case

Grid-tied single -phase solar inverter Product overview
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2.6 The LED light panel
The LED indicator panel as the human-computer interaction interface, may indicate the working
state of the inverter.
2.6.1 The LED light panel
Figure 2.7 LED Front View
LED indicator status description：
Steady blue
Normal, grid-tied and generating
power
Blinking blue at short
interval (0.2s)
Bluetooth connected and with
communication. And inverter has no
error
Blinking blue at long
interval (2s)
DC or AC connected, inverter in
standby or starting (no power
generation)
Steady red
Error occurs.( The inverter fail to
connect to the grid)
Blinking red
Bluetooth connected and in
communicating but inverter has
error
Red light off
AC and DC have been powered off.

Grid-tied single -phase solar inverter Product overview
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2.6.2 LCD operation panel
Figure 2.8 LCD Front View
Definition of LCD operation panel:
①”Run”, running status, shows green light；
②"Fault", the PV string is disconnected,
shows red light;
③Select upwards, short press to move
upwards, long press to return;
④Select downward, short press to move
down, long press to confirm.
LED light display status description：
Indicator
light
Instruction
State
Description
Run
Grid-connected
indicator light
Green light on
connected to grid
Green light off
Not connected to grid
Green light flashes
0.5s On, 0.5s Off)
The inverter is in maintenance
status
Fault
The PV connection
indicator light
Red light on
The power-on indicator light, it
indicates that at least one of the
PV strings is connected normally
and the input voltage is ≥150V
Red light off
The inverter is disconnected from
all PV strings, or the DC input
voltage of all MPPT circuits is
less than 150V

Grid-tied single -phase solar inverter Product overview
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2.7 Bottom of the inverter
XG3-10KTL is equipped with a DC switch that controls the DC terminal switch.
Figure 2.9 without fan
Figure 2.10 with fan(XG7KTL1, XG8KTL1, XG10KTL, XG10KTL1)

Grid-tied single -phase solar inverter Inverter storage
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3 Inverter storage
If the inverter is not put into use immediately, the storage of inverter should meet the following
requirements:
Do not remove the inverter outer package.
The inverter needs to be stored in a clean and dry place, and to prevent the erosion of dust and
moisture.
The storage temperature should be kept at -30℃~+70℃, and the relative humidity should be kept
at 0%RH~100f%RH.
If multiple inverters to be stacked, it is recommended to place them according to the original
stacking layer number at the time of delivery. When stacking, please place the inverter carefully to
avoid personal injury or equipment damage caused by equipment tipping.
Avoid chemical corrosive substances, otherwise it may corrode the inverter.
During storage, regular inspections are required. If insect bites or packaging damage are found,
the packaging materials must be replaced in time. After long-term storage, the inverter needs to be
inspected and tested by professionals before it can be put into use.

Grid-tied single -phase solar inverter Installation
14
4 Installation
This chapter introduces the installation of the inverter and the connection of the inverter to the PV
power generation system. Connecting inverters to PV power generation systems mainly involves the
PV strings and public grids connect to the inverter.
Please read this chapter carefully before installation, and ensure that all installation conditions are
met by professional technicians to complete the inverter installation.
4.1 Unpacking confirmation
The inverter has been thoroughly tested and rigorously checked before delivery, but damage may
still occur during transportation. Before unpacking, check carefully whether the product information in the
order is consistent with that on the nameplate of the package box and whether the product package is
intact. If any damage is detected, please contact the shipping company or the supplier directly. Please
also provide photos of the damage to get our fastest and best service.
When the inverter is left unused, please put it in the original packing box and take measures to
prevent moisture and dust.
Take out the inverter after unpacking, please check the following items:
(1) Confirm that the inverter is complete and not damaged;
(2) Confirm that there are manuals, interface accessories and installation accessories in the packing
box;
(3) Confirm that there is no damage or shortage in the delivery content in the packing box;
(4) Check whether the order is consistent with the product information on the nameplate of the
inverter;
(5) The standard delivery list is as follows.
Standard deliverables of single-phase inverter:

Grid-tied single -phase solar inverter Installation
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Fig4.1 Delivery content of single-phase inverter 3-10kW
Table 4-1 delivery contents of three-phase inverter
Number
Name
Quantity
1
Inverter
1
2
Mounting bracket
1
3
AC side quick connect terminal
1
4
CT,DRM Connect the terminals
1
5
DC connector (pair)
2
6
User manual
1
7
Stainless Steel Expansion Bolts
M6*50
4
8
M6 combination bolt
4
9
M4combination bolt
4
10
M6 nut
4
11
M6 Flat Washer
4
Please check the above carefully. If you have any questions, please contact the supplier in time.

Grid-tied single -phase solar inverter Installation
16
4.2 Prepare before installation
4.2.1 Installation tool
Table 4-2 List of installation tools
Number
Installation tools
instruction
1
Marker pen
Mark the mounting holes
2
Electric drill
Drill holes in the bracket or wall
3
Hand hammer
Knock the expansion bolt
4
Adjustable wrench
For fixed mounting bracket
5
"Flat" or "Cross" screwdriver
For AC wiring
6
Meg ohmmeter
Measure insulation performance and impedance to
ground
7
Multi-meter
Detect circuit and measure AC and DC voltage
8
Electric soldering iron
Welding communication cable
9
Crimping Tool
Crimp DC terminal
10
Hydraulic clamp
Crimp ring terminal for AC wiring
4.2.2 Installation environment
(1) The inverter can be installed in indoor and outdoor environment.
(2) During the operation of the inverter, the temperature of the chassis and heat sink will be relatively
high. Please do not install the inverter in the easily touched position.
(3) Do not install inverters in areas where flammable and explosive materials are stored.
(4) The inverter shall be installed in a well-ventilated environment to ensure inverter heat dissipation.
(5) It is recommended to choose the installation site with shelter or build
Fig 4.2 Sunshade