INVT iMars BG12KTR User manual

Operation Manual
iMars
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(SJEUJFE4PMBS*OWFSUFS
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.

iMarsgrid-tiedsolarinverters Content
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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 Supported grid connection structure ...................................................................................... 11
2.2 Products appearance............................................................................................................ 12
2.2.1 Three-phase inverter.................................................................................................................. 12
2.3 Name plate ............................................................................................................................ 14
2.4 DRM instruction..................................................................................................................... 15
2.5 Models ................................................................................................................................... 16
2.6 Dimensions and weight......................................................................................................... 17
3 Storage...........................................................................................................................................18
4 Installation.....................................................................................................................................19
4.1 Unpacking inspection............................................................................................................ 20
4.2 Before installation.................................................................................................................. 21
4.2.1 Installation tools........................................................................................................................... 21
4.2.2 Installation place............................................................................................................................. 22

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4.2.3 Connection cables........................................................................................................................... 24
4.2.4 Miniature circuit breakers.............................................................................................................. 24
4.3 Mechanical installation.......................................................................................................... 25
4.3.1 Installation of three-phase inverter .............................................................................................. 25
4.4 Electrical installation.............................................................................................................. 28
4.4.1 Connection of solar modules......................................................................................................... 29
4.4.2 AC connection of 12kW / 15kW / 17kW / 20kW / 25kW / 30kW inverter................................. 30
5 Operation.........................................................................................................................................33
5.1 Inspection before operation .................................................................................................. 34
5.2 Grid-tied operation ................................................................................................................ 34
5.3 Stopping................................................................................................................................. 35
5.4 Daily maintenance................................................................................................................. 35
5.4.1 Regular maintenance ..................................................................................................................... 35
5.4.2 Maintenance guide......................................................................................................................... 36
6 Display panel ....................................................................................................................................39
6.1 LED indicators....................................................................................................................... 40
6.2 Operation panel..................................................................................................................... 41
6.3 LCD screen............................................................................................................................ 41
6.4 Functions operation............................................................................................................... 42
6.4.1 Monitoring parameters.................................................................................................................. 42
6.4.2 History ............................................................................................................................................. 43
6.4.3 Statistics .......................................................................................................................................... 44
6.4.4 Parameter settings ......................................................................................................................... 44
6.4.5 System Information........................................................................................................................ 51
6.4.6 Faults ............................................................................................................................................... 51

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6.4.7 Inverter control............................................................................................................................... 51
6.4.8 Mode settings ................................................................................................................................. 52
6.5 Grid Certification Choice....................................................................................................... 53
7 Monitoring communication...............................................................................................................55
7.1 Standard communication ...................................................................................................... 56
7.2 Optional communication ....................................................................................................... 57
7.3 RS485-DRM ports................................................................................................................. 58
8 Troubleshooting ...............................................................................................................................59
9 Contact us.........................................................................................................................................63
10 Technical parameters......................................................................................................................64

iMarsgrid-tiedsolarinverters Safetyprecautions
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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˖
zInjury to the life and personal safety of the operator or other people.
zDamage 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
N
ame
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
Donot
Donot
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
Physical hurt may occur if not follow the
relative requirements
Note
1.2 Safety guidelines
z
The first thing after receiving is to check for any visible damage to the package
or to the inverter. If there is something suspect
ed, contact the shipping company
and local dealer before installing.
zOnly qualified electricians are allowed to operate on the inverter.
zDo not
carry out any wiring and inspection or changing components when the
power supply is applied.
Hazardous voltages may still be present in the inverter
even if the AC and DC main switches are switched off. Wait at least 5 minutes
after
switching off the inverter. This ensures that the capacitors are electrically
discharged.
zThis product can cause a residual
current in the external protective earth
conductor. Where a residual current-
operated protective (RCD) or monitoring
(RCM) device
is strongly recommend to used for protection in a case of direct or
indirect contact, only an RCD or RCM of Type B is allowed on the supply
side of
this product.

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zEnsure that there is no electromagnetic interference from
other electrical and
electronic equipments on the installation site.
zDo not refit the inverter unauthorized.
z
All the electric installation needs to be compliance with the national or local laws
and standards.
zThe temperature of individual parts or the enclosure of the inverter–especia
lly
the heat sink may become hot in normal operation. There is a danger of burning.
Do not touch.
zDo not open the cover of inverters unauthorizedly. The electrical parts and
components inside the inverter are electrostatic. Take measurements to avoid
electrostatic discharge during relevant operation.
zThe inverter must be reliably grounded.
zEnsure
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:
zOperators need professional training.
zOperators must read this manual completely and master the related safety
precautions.
z
Operators need to be familiar with the relevant safety regulations for electrical systems.
z
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.
zOperators must wear personal protective equipment.
1.2.1 Delivery and installation
zKeep the package and unit complete, dry and c
lean during storage and delivery.
zP
lease remove and install the inverter with two or more people, because of the
inverter is heavy.
zRemove and install the inverter with appropriate
tools to ensure safe and normal
operation and avoid physical injury or death. The people also need m
echanical

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protective measures, such as protective shoes and work clothes.
zOnly qualified electricians are allowed to install the inverter.
zDo not put and install the inverter on or close to combustible materials.
zKeep the installation site away from children and other public places.
zRemove the metal jewelry such as ring and bracelet before installation and
electrical connection to avoid electric shock.
zDo cover solar modules with light-tight materials. Exposed to sunlight, solar
modules will output dangerous voltage.
zThe inverter input voltage does not exceed the maximum input voltage;
otherwise inverter damage may occur.
zThe positive and negative pole of solar module
s can not be grounded, otherwise
irrecoverable damage may occur.
zEnsure the proper grounding of the inverter
, otherwise, improper connection or
no grounding may cause stop of the inverter.
zEnsure reliable installation and electrical connection.
zWhen the photovoltaic generator cells are exposed to light (even if i
t is dim), the
generator supplies DC voltage to the inverter.
Note: iMars grid-tied solar inverters are only for crystalline silicon solar modules.
1.2.2 Grid-tied operation

zOnly qualified electricians are allowed to operate the inverter under the
permission of local power departments.
zAll electrical connections must meet the electrical standards of the
countries/regions in which the project is located.
zEnsure reliable installation and electrical connection before operation. 
zDo not open the cover of inverter during operation or voltage is present. 
1.2.3 Maintenance and inspection

zO
nly qualified electricians are allowed to perform the maintenance, inspection,
and components replacement of the inverter.
zContact with the local dealer or supplier for maintenance.
zIn order to avoid irrelevant personnel from entering the maintenance area
during

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maintenance, temporary warning labels must be placed to warn
non-professionals to enter or use fence for isolation.
zFirstly disconnect all power supplies of the grid to the inverter before any
maintenance, and then disconnect the breakers and w
ait for at least 5 minutes
until the inverter is discharged before maintenance.
zPlease follow electrostatic protection norms and take correct protective
measures because of the electrostatic sensitive circuits and devices in the
inverter.
zDo not use parts and components not provided by our company during
maintenance.DŽ
zRestart the inverter after settling the fault and problem which may affect the
safety and performance of the inverter. 
zDo 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. P
lease do
not ignore the warning icons and instructions with “electric shock”.
1.2.4 What to do after scrapping

z
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.

iMars grid-tied solar inverters Product overview
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2 Product overview
This chapter mainly describes the appearance, packaging accessories, name plate, technical
parameters and other information of iMars grid-tied solar inverters.

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2.1 Solar grid-tied power generation system
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 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 grid-tied solar inverters are only applied in solar grid-tied power generation system and its
DC input are onlycomposed of crystallinesilicon solar modules whose negative and positive poles
are not grounded.
zThe recommended solar modules need to comply
with IEC61730 Class Arating.
ziMars grid-tied solar inverters are only for crystalline silicon solar modules.
2.1.1 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.

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Figure 2.2 Type of grid
2.2 Products appearance
2.2.1 Three-phase inverter
Figure 2.3 Products appearance of 12~17kW

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Figure 2.4 Products appearance of 20~30kW
Table 2-1 Parts instruction of Three-phase grid-tied solar inverter
No.
Name Instruction
1
Cover
2
Operational panel
LED indicators, LCD screen and buttons
3
C
ommunication port
DRM communication port
4
DC input port
For the connection of solar modules
5
C
ommunication port
RS485 and EXT communication port
6
AC terminal
F
or the connection of AC output
7
Installation hanger
For the connection of inverter and installation bracket
8
Fan mounting plate
Air
inlet, and for fans fixing
9
Concave handle
Fo
r removing and carrying
10
Safety precautions
11
Name plate
For rated parameters
of the inverter
12
External grounding hole
1
3
Air duct
For ventilation
14
Screw holes
To fasten the inverter on the installation bracket
1
5
Cooling chamber
Protect the radiator and fan

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2.3 Name plate
After receiving, please check the information of name plates are the ordered one. If not, please
contact with the supplier as soon as possible.
Figure 2.5 Name plate
˄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

iMars grid-tied solar inverters Product overview
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Icons
Instruction
zTUV certification mark. The inverter is certified by TUV.
zCE certification mark. The inverter complies with the CE directive.
zCQC certification mark. The inverter is certified by CQC.
zEU WEEE mark. Cannot dispose of the inverter as household waste.
2.4 DRM instruction
Figure 2.6 DRM label
Table 2-2 DRMs instruction
No.
Mode
Requirement
1
DRM0
Oper
ate the disconnection devise
2
DRM1
D
o not consume power
3
DRM2
D
o not consume at more than 50% of rated power
4
DRM3
Do not consume at more than 75% of rated power AND Source reactive
power if capable
5
DRM4
Increase power consumption(subject to constraints from other active DRMs)
6
DRM5
D
o not generate power
7
DRM6
D
o not generate at more than 50% of rated power
8
DRM7
Do not generate at more than 75% of rated power AND Sink reactive power if
capabl
e
9
DRM8
Increase power generation(subject to constraints from other active DRMs)
Note: Our product only realize the DRM0 function

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2.5 Models
Table 2-3 Models of iMars grid-tied solar inverter
Product name Model
Rated output power
Three
-phase (L1, L2, L3, N, PE)
Three-phase grid-
tied solar inverter
12kW 12000 W
Three-phase grid-
tied solar inverter
15kW 15000 W
Three-phase grid-
tied solar inverter
17kW 17000 W
Three-phase grid-
tied solar inverter
20kW 20000 W
Three-phase grid-
tied solar inverter
25kW 25000 W
Three-phase grid-
tied solar inverter
30kW 30000 W
Note: Refer to the product specifications in chapter 10 for detailed information.

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2.6 Dimensions and weight
Figure 2.7 Inverter dimensions
Table 2-4 Inverter dimension and net weight
Model
H
(mm)
W
(mm)
D
(mm)
Net weight
(kg)
12kW / 15kW/ 17kW 610 480
230
36
20kW / 25kW / 30kW 660 520
250
53

W
H
D
Figure 2.8 Paper packages dimension
Table 2-5 Packages dimension and gross weight
Model
H
(mm)
W
(mm)
D
(mm)
Gross weight
(kg)
Packaging
Material
12kW / 15kW/ 17kW
788
622
396
43
Paper
20kW / 25kW / 30kW
850
6
65
410
62
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:
zDo not remove the outer packing.
zThe inverter needs to be stored in a clean and dry place, and prevent the erosion of dust and
water vapor.
zThe storage temperature should be kept at -40°C~+70°C, and the relative humidity should
be kept at 5%RH~95%RH.
zThe 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.
zKeep away from chemically corrosive substances that may corrode the inverter.
zPeriodic 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.