INVT iMars User manual

Operation Manual
iMars
Grid-tied Solar 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 Name plate ............................................................................................................................ 14
2.4 Models ................................................................................................................................... 15
2.5 Dimensions and weight......................................................................................................... 16
3 Storage...........................................................................................................................................17
4 Installation.....................................................................................................................................18
4.1 Unpacking inspection............................................................................................................ 19
4.2 Before installation.................................................................................................................. 21
4.2.1 Installation tools........................................................................................................................... 21
4.2.2 Installation place ......................................................................................................................... 21
4.2.3 Connection cables........................................................................................................................... 24
4.2.4 Miniature circuit breakers.............................................................................................................. 24
4.3 Mechanical installation.......................................................................................................... 25

iMars grid-tied solar inverters Contents
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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 inverter .............................................................................................................. 30
5 Operation .........................................................................................................................................34
5.1 Inspection before operation .................................................................................................. 35
5.2 Grid-tied operation ................................................................................................................ 35
5.3 Stopping................................................................................................................................. 36
5.4 Daily maintenance................................................................................................................. 36
5.4.1 Regular maintenance ..................................................................................................................... 36
5.4.2 Maintenance guide......................................................................................................................... 37
6 Display panel ....................................................................................................................................40
6.1 LED indicators....................................................................................................................... 41
6.2 Operation panel..................................................................................................................... 42
6.3 LCD screen............................................................................................................................ 42
6.4 Functions operation............................................................................................................... 43
6.4.1 Monitoring parameters .................................................................................................................. 43
6.4.2 History ............................................................................................................................................. 45
6.4.3 Statistics .......................................................................................................................................... 45
6.4.4 Parameter settings ......................................................................................................................... 45
6.4.5 System Information ........................................................................................................................ 52
6.4.6 Faults ............................................................................................................................................... 52
6.4.7 Inverter control............................................................................................................................... 52
6.4.8 Mode settings ................................................................................................................................. 53
6.5 Grid Certification Choice....................................................................................................... 53
7 Monitoring communication...............................................................................................................56
7.1 Standard communication ...................................................................................................... 57
7.2 Optional communication ....................................................................................................... 58
8 Troubleshooting ...............................................................................................................................60

iMars grid-tied solar inverters Contents
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9 Contact us.........................................................................................................................................64
10 Technical parameters ......................................................................................................................65

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
Physical hurt may occur if not follow the
relative requirements
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.
Do not 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.
Do not refit the inverter unauthorized.
All the electric installation needs to be compliance with the national or local laws
and standards.

iMars grid-tied solar inverters Safety precautions
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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 andAC 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.

iMars grid-tied solar inverters Safety precautions
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Keep the installation site away from children and other public places.
Remove the metal jewelry such as ring and bracelet before installation and
electrical connection to avoid electric shock.
Do cover solar modules with light-tight materials. Exposed to sunlight, solar
modules will output dangerous voltage.
The inverter input voltage does 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 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.
Firstly disconnect all power supplies of the grid to the inverter before any
maintenance, and then disconnect the breakers and wait for at least 5 minutes
until the inverter is discharged before maintenance.

iMars grid-tied solar inverters Safety precautions
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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 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.

iMars grid-tied solar inverters Product overview
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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 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 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 of 12~17kW
Figure 2.4 Products appearance of 20~40kW

iMars grid-tied solar inverters Product overview
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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
DC switch
On –off of the DC input
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
Installation hanger
For the connection of inverter and installation bracket
8
Fan mounting plate
Air inlet, and for fans fixing
9
Concave handle
For removing and carrying
10
Safety precautions
11
Name plate
For rated parameters of the inverter
12
External grounding
hole
13
Air duct
For ventilation
14
Screw holes
To fasten the inverter on the installation bracket
15
Cooling chamber
Protect the radiator and fan

iMars grid-tied solar inverters Product overview
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2.3 Name plate
Figure 2.5 shows the inverter nameplate.
Figure 2.5Name 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
TUV certification mark. The inverter is certified by TUV.
CE certification mark. The inverter complies with the CE directive.
CQC certification mark. The inverter is certified by CQC.
EU WEEE mark. Cannot dispose of the inverter as household waste.
2.4 Models
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
12kW
12000
Three-phase grid-tied solar inverter
15kW
15000
Three-phase grid-tied solar inverter
17kW
17000
Three-phase grid-tied solar inverter
20kW
20000
Three-phase grid-tied solar inverter
20kW-M
20000
Three-phase grid-tied solar inverter
25kW
25000
Three-phase grid-tied solar inverter
30kW
30000
Three-phase grid-tied solar inverter
33kW
33000
Three-phase grid-tied solar inverter
35kW
35000
Three-phase grid-tied solar inverter
40kW
40000
Note: Refer to the product specifications in chapter 10.

iMars grid-tied solar inverters Product overview
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2.5 Dimensions and weight
Figure 2.6 Inverter dimensions
Table 2-4 Inverter dimension and net weight
Model
H
(mm)
W
(mm)
D
(mm)
Net weight
(kg)
12kW / 15kW/ 17kW / 20kW-M
610
480
230
36
20kW / 25kW / 30kW / 33kW
/ 35kW / 40kW
660
520
250
53
W
H
D
Figure 2.7 Paper packages dimension
Table 2-5 Packages dimension and gross weight
Model
H
(mm)
W
(mm)
D
(mm)
Weight (kg)
Packagin
g Material
12kW / 15kW / 17kW / 20kW-M
788
622
396
43
Paper
20kW / 25kW / 30kW / 33kW
/ 35kW / 40kW
850
665
410
62
Paper

iMars grid-tied solar inverters Storage
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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.

iMars grid-tied solar inverters Installation
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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.