INVT iMars BG10KTR User manual

Operation Manual
Photovoltaic Grid-connected Inverter
INVT Solar Technology (Shenzhen) Co., Ltd.

1
Preface
The manual is intended to provide detailed information of product information, installation,
application, trouble shooting, precautions and maintenance of iMars series grid-tied solar inverters.
The manual does not contain all the information of the 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 may be data deviation because of product improving. Detailed information is in accordant
with the final product.

iMars grid-tied solar inverters Contents
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Contents
Preface ..................................................................................................................................................1
Contents................................................................................................................................................2
1 Safety precautions .........................................................................................................................5
1.1 Icons...........................................................................................................................................................6
1.2 Safety guidelines.....................................................................................................................................6
1.2.1 Delivery and installation ...............................................................................................................7
1.2.2 Grid-tied operation.........................................................................................................................8
1.2.3 Maintenance and inspection........................................................................................................8
1.2.4 What to do after scrapping...........................................................................................................9
2 Product overview .........................................................................................................................10
2.1 Solar grid-tied power generation system........................................................................................ 11
2.1.1 Application.................................................................................................................................... 11
2.1.2 Supported grid connection structure ...................................................................................... 11
2.2 Products appearance.......................................................................................................................... 12
2.3 Nameplate ............................................................................................................................................. 13
2.4 Products modules ................................................................................................................................ 14
2.5 Dimensions and weight....................................................................................................................... 15
3 Storage...........................................................................................................................................16
4 Installation.....................................................................................................................................17
4.1 Unpacking inspection.......................................................................................................................... 18
4.2 Before installation ................................................................................................................................ 19

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4.2.1 Installation tools........................................................................................................................... 19
4.2.2 Installation site............................................................................................................................. 19
4.2.3 Specification of cable................................................................................................................. 21
4.2.4 Micro breaker............................................................................................................................... 22
4.3 Mechanical installation........................................................................................................................ 22
4.3.1 Installation of inverter................................................................................................................. 23
4.4 Electrical connection ........................................................................................................................... 26
4.4.1 Connection of photovoltaic string............................................................................................ 27
4.4.2 Grid connection........................................................................................................................... 29
5 Operation.......................................................................................................................................30
5.1 Inspection before operation............................................................................................................... 31
5.2 Inverter grid-connected running........................................................................................................ 31
5.3 Inverter stop .......................................................................................................................................... 32
5.4 Daily maintenance and inspection ................................................................................................... 32
5.4.1 Periodic maintenance on the inverter..................................................................................... 33
5.4.2 Maintenance guidance .............................................................................................................. 34
6 Display and operation panel.......................................................................................................37
6.1 LED indicators....................................................................................................................................... 38
6.2 Operation panel.................................................................................................................................... 39
6.3 LCD screen............................................................................................................................................ 40
6.4 Functions operation............................................................................................................................. 41
6.4.1 Monitoring parameters............................................................................................................... 41

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6.4.2 History ........................................................................................................................................... 41
6.4.3 Statistics........................................................................................................................................ 42
6.4.4 Parameter settings ..................................................................................................................... 42
6.4.5 System Information..................................................................................................................... 50
6.4.6 Current faults ............................................................................................................................... 50
6.4.7 Inverter control............................................................................................................................. 50
6.5 Grid certification choice...................................................................................................................... 51
7 Monitoring communication...............................................................................................................54
7.1 Standard communication.................................................................................................................... 55
7.2 Optional communication..................................................................................................................... 57
8 Troubleshooting ...............................................................................................................................58
9 Contact us .....................................................................................................................................61
10 Technical parameters .....................................................................................................................62

iMars grid-tied solar inverters Safety precautions
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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.

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1.1 Icons
This manual provides relevant information with icons to highlight the physical and property safety
of the user to avoid device damage and physical injury.
The icons used in this manual are listed below:
Icons
Name
Instruction
Abbreviation
Danger
Danger
Serious physical injury or even death
may occur if not follow the relative
requirements
Warning
Warning
Physical injury or damage to the devices
may occur if not follow the relative
requirements
Do not
Do not
Damage may occur if not follow the
relative requirements
Hot sides
Hot sides
Sides of the device may become hot. Do
not touch
Note
Note
The procedures taken for ensuring
proper operation.
Note
1.2 Safety guidelines
The first thing after receiving is to check for any visible damage to the
package or to the inverter. If there is something suspected, contact the
shipping company and local dealer before installing.
The installation and operation of PV inverter must be carried out by
professional technicians who have received professional trainings and
thoroughly familiar with all the contents in this manual and the safety
requirements of the electrical system.
Donot carry out any wiring and inspection or changing components when
the power supply is applied.
Ensure that there is no electromagnetic interference from other electrical
and electronic equipment on the installation site.
Donot refit the inverter unauthorized.
All the electric installation needs to be compliance with the national or local
laws and standards.

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The temperature of individual parts or the enclosure of the
inverter–especially the heat sink may become hot in normal operation.
There is a danger of burning. Do not touch.
The inverter must be reliably grounded before operation.
Do not open the cover of inverters unauthorized. The electrical parts and
components inside the inverter are electrostatic. Take measurements to
avoid electrostatic discharge during relevant operation.
The inverter must be reliably grounded.
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.
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 Delivery and installation
Keep the package and unit complete, dry and clean during storage and delivery.
Please remove and install the inverter with two or more people, because of the
inverter is heavy.
Remove and install the inverter with appropriate tools to ensure safe and normal
operation and avoid physical injury or death. The people also need mechanical
protective measures, such as protective shoes and work clothes.
Only qualified electricians are allowed to install the inverter.
Do not put and install the inverter on or close to combustible materials.

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Keep the installation site away from children and other public places which is
easy to access.
Remove the metal jewelry such as ring and bracelet before installation and
electrical connection to avoid electric shock.
The solar panel exposed to the sunlight may generate dangerous voltage. Users
must cover the solar panel with fully-lightproof materials before electrical
connection
The inverter input voltage should not exceed the maximum input voltage;
otherwise inverter damage may occur.
The positive and negative pole of solar modules can not be grounded, otherwise
irrecoverable damage may occur.
Ensure the proper grounding of the inverter, otherwise, improper connection or
no grounding may cause stop of the inverter.
Ensure reliable installation and electrical connection.
Note: iMars series grid-tied solar inverters are only for crystalline silicon solar modules.
1.2.2 Grid-tied operation
Only qualified electricians are allowed to operate the inverter under the
permission of local power departments.
All electrical connections must meet the electrical standards of the
countries/regions in which the project is located.
Ensure reliable installation and electrical connection before operation.
Do not open the cover of inverter during operation or voltage is present.
1.2.3 Maintenance and inspection
Only qualified electricians are allowed to perform the maintenance, inspection,
and components replacement of the inverter.
Contact with the local dealer or supplier for maintenance.
In order to avoid irrelevant personnel from entering the maintenance area during
maintenance, temporary warning labels must be placed to warn
non-professionals to enter or use fence for isolation.
Before carrying out any maintenance operations, users must disconnect the
breaker on grid side, then disconnect the breaker on PV side and wait for at least

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5 minutes until the internal parts of the inverter are fully discharged.
Please follow electrostatic protection norms and take correct protective measures
because of the electrostatic sensitive circuits and devices in the inverter.
Do not use parts and components not provided by our company during
maintenance.
Restart the inverter after settling the fault and problem which may affect the
safety and performance of the inverter.
Do not get close to or touch any metal conductive part of the grid or inverter,
otherwise electric shock, physical injury or death and fire may occur. Please do
not ignore the warning icons and instructions with “electric shock”.
1.2.4 What to do after scrapping
Do not dispose of the inverter together with household waste. The user has the
responsibility and obligation tosend it to thedesignated organization for recycling
and disposal.

iMars grid-tied solar inverters Product overview
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2 Product overview
This chapter mainly describes the appearance, packaging accessories, nameplate, and other
information of iMars series grid-tied solar inverters.

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2.1 Solar grid-tied power generation system
2.1.1 Application
The photovoltaic grid-tied power generation system consists of solar modules, grid-tied inverter,
metering devices and public grid.
Figure 2.1 Application of iMars series grid-tied solar inverters
Grid-tied solar inverter is the core of photovoltaic power generation system. The solar energy can
be converted into DC electric energy through solar modules and then be changed into sinusoidal
AC energy which has the same frequency and phase with the public grid by grid-tied solar
inverters, and then be fed to the grid.
iMars series grid-tied solar inverters are only applied in solar grid-tied power generation system
and its DC input are only composed of crystalline silicon solar modules whose negative and
positive poles are not grounded.
The recommended solar modules need to comply with IEC61730 Class A rating.
2.1.2 Supported grid connection structure
iMars series grid-tied solar inverters support TN-S, TN-C, TN-C-S , TT and IT grid connection.
When applied to the TT connection, the N-to-PE voltage should be less than 30V.
Figure 2.2 Type of grid

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2.2 Products appearance
Figure 2.3 Products appearance
Table 2-1 Parts instruction
No.
Name
Instruction
1
Cover
2
Operational panel
LED status light, LCD display, keypad
3
DC switch
On–off of the DC input (optional)
4
DC input port
For the connection of solar modules
5
Communication port
RS485 and EXT communication port
6
AC terminal
For the connection of AC output
7
Cooling chamber
8
Back panel mounting screws
9
Name plate
For rated parameters and safety precautions
of the inverter
10
FAN
4~6kW(NO FAN) , 8~10kW(Air cooling)

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2.3 Nameplate
Figure 2.4 Inverter nameplate
（1）Trademark and product type
（2）Model and important technical parameters
（3）Certification system of the inverter confirming
（4）Serial number, company name and country of origin

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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. Cannot dispose of the inverter as household waste.
2.4 Products modules
Table 2-2 Models of iMars grid-tied solar inverter
Product name
Model
Rated output power （W）
Three-phase (L1,L2,L3,N,PE)
Three-phase grid-tied solar inverter
4kW
4000
Three-phase grid-tied solar inverter
4kW-S
4000
Three-phase grid-tied solar inverter
5kW
5000
Three-phase grid-tied solar inverter
5kW-S
5000
Three-phase grid-tied solar inverter
6kW
6000
Three-phase grid-tied solar inverter
8kW
8000
Three-phase grid-tied solar inverter
10kW
10000
Note: Technical parameters of iMars series inverter refers to technical parameters.

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2.5 Dimensions and weight
Figure 2.5 Inverter dimensions
Table 2-3 Inverter dimension and net weight
Model
H (mm)
W (mm)
D (mm)
Net weight (kg)
4kW / 4kW–S / 5kW
/ 5kW-S / 6kW
530
360
150
20
8kW / 10kW
575
360
150
23
W
H
D
Figure 2.6 Paper packages dimension
Table 2-4 Packages dimension and gross weight
Model
H (mm)
W (mm)
D (mm)
Weight (kg)
Packaging
Material
4kW / 4kW–S / 5kW /
5kW-S / 6kW
630
470
284
22
Paper
8kW / 10kW
675
470
284
25
Paper

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3 Storage
If the inverter is not put into use immediately, the storage of inverter should meet the following
requirements:
Do not remove the outer packing.
The inverter needs to be stored in a clean and dry place, and prevent the erosion of dust and
water vapor.
The storage temperature should be kept at -40°C~+70°C, and the relative humidity should
be kept at 5%RH~95%RH.
The stacking of inverters is recommended to be placed according to the number of stacking
layers in the original shipment. Place the inverter carefully during stacking to avoid personal
injury or equipment damage caused by the falling of equipment.
Keep away from chemically corrosive substances that may corrode the inverter.
Periodic inspections are required. If damages are found by worms and rats, or packaging
are found to be damaged, the packaging materials must be replaced in time.
After long-term storage, inverters need to be inspected and tested by qualified personnel before
put into use.

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4 Installation
This chapter describes how to install the inverter and connect it to the grid-tied solar system
(including the connection between solar modules, public grid and inverter).
Read this chapter carefully and ensure all installation requirements are met before installation.
Only qualified electricians are allowed to install the inverter.

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4.1 Unpacking inspection
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.
Store the idled inverter in its original package and take anti-moisture and anti-dust measures.
After taking the inverter out of the box, check the following items:
(1) Confirm the main body of the inverter is intact and free from any damage;
(2) Confirm there is operation manual, interface accessories and installation accessories
inside the package box;
(3) Confirm the deliverables inside the package box are intact and complete;
(4) Check whether the product information in the order is consistent with that on the inverter
nameplate;
(5) The standard delivery list is shown below.
Standard deliverables of inverter:
Figure 4.1 Delivery content