KStar KSG-120CL-M0/M3 User manual

202106 Ver:1.0
Shenzhen Kstar New Energy Company Limited
Add:Kstar Industrial Park, Guangming Hi-Tech Park,
shenzhen ,P.R.CHINA
Tel:[phone] Fax:[phone]
Web:www.kstar.com
PV Grid-Connected Inverter
User Manual
KSG-120CL-M0/M3

All Rights Reserved
All Rights Reserved
No part of this document can be reproduced in any form or by any means without the
prior written permission of Shenzhen Kstar New Energy Company Limited
(hereinafter "KSTAR").
and other trademarks used in this manual are owned byKSTAR
Shenzhen Kstar New Energy Company Limited.
All other trademarks or registered trademarks mentioned in this document are
owned by their respective owners.
Trademarks
Software Licenses
It is prohibited to use data contained in firmware or software developed by
KSTAR, in part or in full, for commercial purposes by any means.
It is prohibited to perform reverse engineering, cracking, or any other operations
that compromise the original program design of the software developed by
KSTAR.
User Manual
Ⅰ

Symbol Explanation
Indicates a situation that, if not avoided, could result in
equipment or property damage.
Indicates additional information, emphasized contents or tips
that may be helpful, e.g. to help you solve problems or save time.
About This Manual
The manual mainly describes the product information, guidelines for
installation,operation and maintenance. The manual cannot include complete
information about the photovoltaic (PV) system. You can get additional information
about other devices at or on the webpage of the respective www.kstar.com
component manufacturer.
Validity
This manual is valid for the following inverter types:
KSG-120CL-M0/M3
They will be referred to as “inverter” hereinafter unless otherwise specified.
Target Group
This manual is intended for:
qualified personnel who are responsible for the installation and commissioning
of theinverter;
inverter owners who will have the ability to interact with the inverter.
How to Use This Manual
Read the manual and other related documents before performing any work on the
inverter is carried out. Documents must be stored carefully and be available at all
times.The contents of the manual will be periodically updated or revised due to the
product development. It is probably that there are changes of manual in the
subsequent inverter edition. The latest manual can be acquired via visiting the
website at www.kstar.com.
Symbols
Important instructions contained in this manual should be followed during
installation,operation and maintenance of the inverter. They will be highlighted by
the following symbols.
Symbol Explanation
Indicates a hazard with a high level of risk that, if not voided,
will result in death or serious injury.
Indicates a hazard with a medium level of risk that, if not
avoided,could result in death or serious injury.
Indicates a hazard with a low level of risk that, if not avoided,
could result in minor or moderate injury.
User Manual User Manual
Ⅱ Ⅲ

Ⅴ
All Rights Reserved ......................................................................................... I
About This Manual ...........................................................................................II
1 Safety .........................................................................................................1
1.1 PV Panels................................................................................................1
1.2 Utility Grid...............................................................................................1
1.3 Inverter...................................................................................................2
1.4 Skills of Qualified Personnel.....................................................................3
2 Product Introduction...................................................................................4
2.1 Intended Usage......................................................................................4
2.2 Product Introduction................................................................................5
2.2.1 Model Description.............................................................................5
2.2.2 Appearance......................................................................................6
2.2.3 Dimensions......................................................................................6
2.2.4 LED Board........................................................................................7
2.2.5 DC Switch........................................................................................7
2.3 Circuit Diagram.......................................................................................7
2.4 Function Description...............................................................................8
3 Unpacking and Storage.........................................................................10
3.1 Unpacking and Inspection......................................................................10
3.2 Identifying the Inverter...........................................................................10
3.3 Scope of Delivery..................................................................................12
3.4 Inverter Storage....................................................................................12
4 Mechanical Mounting............................................................................14
4.1 Safety during Mounting..........................................................................14
4.2 Location Requirements..........................................................................14
4.2.1 Installation Environment Requirements.............................................14
4.2.2 Carrier Requirements......................................................................15
4.2.3 Installation Angle Requirements.......................................................15
4.2.4 Installation Clearance Requirements................................................16
4.3 Installation Tools...................................................................................18
4.4 Moving the Inverter................................................................................19

Ⅵ Ⅶ
4.4.1 Manual Transport ............................................................................19
4.4.2 Hoisting Transport ...........................................................................19
4.5 Dimensions of mounting-bracket ..............................................................20
4.6 PV Bracket-Mounted Installation ...............................................................21
4.6.1 Preparation before Mounting .............................................................21
4.6.2 Mounting Steps ................................................................................21
4.7 Wall-Mounted Installation ........................................................................23
4.7.1 Preparation before Mounting .............................................................23
4.7.2 Mounting Steps ................................................................................23
5 Electrical Connection 26........................................................................26
5.1 Safety Instructions ..................................................................................26
5.2 Terminal Description ...............................................................................26
5.3 Electrical Connection Overview ................................................................28
5.4 Additional Grounding Connection .............................................................30
5.4.1 Additional Grounding Requirements ..................................................30
5.4.2 Connection Procedure ......................................................................30
5.5 Opening the Wiring Compartment .............................................................31
5.6 AC Cable Connection ..............................................................................32
5.6.1 AC Side Requirements .....................................................................32
5.6.2 Requirements for OT/DT Terminal .....................................................34
5.6.3 Aluminium Cable Requirements .........................................................34
5.6.4 Connection Procedure ......................................................................35
5.7 DC Cable Connection ..............................................................................38
5.7.1 PV Input Configuration .....................................................................39
5.7.2 Connection Procedure ......................................................................40
5.7.3 Installing the PV Connectors .............................................................41
5.8 RS485 Communication ............................................................................42
5.8.1 Interface Description. .......................................................................42
5.8.2 RS485 Communication System .........................................................42
5.8.3 Connection Procedure(Terminal Block) .............................................43
5.9 PLC Communication Connection ..............................................................45
5.10 ...................................45Wiring of Tracking System Power Cable(Optional)
5.11 Closing the Wiring Compartment ............................................................46
6. ...................................................................................47Commissioning
6.1 Inspection before Commissioning...........................................................47
2 Commissioning Procedure.....................................................................47 6.
7. Bluetooth APP Settings....................................................................48
7.1 Overview...............................................................................................48
7.2 APP download........................................................................................48
7.3 Bluetooth connection..............................................................................48
7.4 Basic information interface......................................................................50
7.5 Query interface.......................................................................................51
7.6 Setting interface......................................................................................51
7.6.1 Set page information.......................................................................53
7.6.2 Related parameters setting interface................................................54
7.6.3 Set parameter information...............................................................55
7.7 Statistics interface.................................................................................58
8 System Decommissioning. .........................................................................59
8.1 Disconnecting the Inverter ........................................................................59
8.2 Dismantling the Inverter ...........................................................................60
8.3 Disposal of the Inverter .............................................................................60
9 Troubleshooting and Maintenance. ......................................................61
9.1 ......................................................................................61Error and alarm
9.1.1 Inverter system error type analysis and solution.................................62
9.2 .......................................................................................65Error and alarm
9.2.1 Routine Maintenance y......................................................................66
9.2.2 Maintenance Instruction ...................................................................66
10 Appendix. ...............................................................................................69
10.1 Technical Data .......................................................................................69
10.2 Quality Assurance ..................................................................................71
10.3 Contact Information ................................................................................71

The inverter has been designed and tested strictly according to international safety
regulations. Read all safety instructions carefully prior to any work and observe
them at all times when working on or with the inverter.
Incorrect operation or work may cause:
injury or death to the operator or a third party;
damage to the inverter and other property safety of the operator or a third party.
All detailed work-related safety warnings and notes will be specified at critical
points in this manual.
The safety instructions in this manual cannot cover all the precautions
that should be followed. Perform operations considering actual onsite
conditions.KSTAR shall not be held liable for any damage caused by
violation of the safety instructions in this manual.
1.1 PV Panels
PV strings will produce electrical power when exposed to sunlight and can
cause a lethal voltage and an electric shock.
Always keep in mind that the inverter is dual power supplied.
electrical operators must wear proper personal protective equipment:
helmet, insulated footwear, glove, etc.
Before touching the DC cables, operator must use a measuring device
to ensure that the cable is voltage-free.
Must follow all warnings on the PV strings and in its manual.
Please follow the regulations related to the utility grid.
01
User Manual

All electrical connections must be in accordance with local and national
standards.
Only with the permission of the utility grid, the inverter can be connected to
the utility grid.
Danger to life from electric shocks due to live voltage
Do not open the enclosure at any time. Unauthorized opening will void
guarantee and warranty claims and in most cases terminate the
operating license.
Risk of inverter damage or personal injury
Do not pull out the PV connectors when the inverter is running.
Wait at least 5 minutes for the internal capacitors to discharge. Ensure
that there is no voltage or current before pulling any connector.
All safety instructions, warning labels, and nameplate on the inverter:
Must be clearly legible.
Should not be removed or covered.
Risk of burns due to hot components!
Do not touch any hot parts (such as heat sink) during operation. Only the
DC switch can safely be touched at any time.
Only qualified personnel can perform the country setting.
• Unauthorized alteration of the country setting may cause a breach of the type-
certificate marking.
By touching the electronic components, you may damage the inverter. For
inverter handling, be sure to:
• avoid any unnecessary touching;
• wear a grounding wristband before touching any connectors.
Danger to life due to high voltages!
Only qualified personnel can open and service the inverter.
Check the user manual before service!
All installations should be performed by qualified personnel. They should have:
•Training in the installation and commissioning of the electrical system, as well
as the dealing with hazards;
•Knowledge of the manual and other related documents;
•Knowledge of the local regulations and directives.
02 03
5min
Warning Label
User Manual User Manual
Caution,risk of electric shock,energy strorage timed
discharge.
Caution,hot suface.
Caution,risk of electric shock.

04 05
KSG-120CL-M0/M3, a transformerless three-phase PV grid-connected inverter, is
an integral component in the PV power system.
The inverter is designed to convert the direct current power generated from the PV
modules into grid-compatible AC current and feeds the AC current to the utility grid.
The intended usage of the inverter is illustrated in "figure 2-1 Inverter application in
PV power system".
figure 2-1 Inverter application in PV power system
Inverter cannot connect the PV strings whose positive and negative
terminals need to be grounded.
Do not connect any local load between the inverter and the AC circuit
breaker.
A PV strings
B Inverter
Monocrystalline silicon, polycrystalline silicon and thin-
film without grounding.
KSG-120CL-M0/M3
Boost the low voltage from inverter to grid-compatible
medium voltage.
3W+N+PE,3W+PE
2 Product Introduction
A B C D
The device model description is as follows:
The device model can be found on the nameplate attached to the side of the inverter.
For details, refer to "3.2 Identifying the Inverter".
User Manual User Manual
121KW@25 ℃
110KW@ 45 ℃ 3W+PE(default),3W+N+PE(configurable)
KSG-120CL-M0/M3
KSG 120 CL
Code of Product Series
Code of Power level
Photovoltaic grid-connected inverter
Code of Product current
M0/M3

2.2.2Appearance
*The image shown here is for reference only. The actual product you receive may differ.
LED controlled
panel
HMI interface to indicate the present working state of
the inverter.
Labels
Additional grounding
terminals use at least one of them to ground the inverter.
Bottom handles
Side handles
Mounting ears
Wiring area DC switches, AC terminals, DC terminals, and
communication terminals.
For details, refer to "5.2 Terminal Description".
figure 2-2 Dimensions of the Inverter
*The image shown here is for reference only. The actual product you receive may differ.
KSG-120CL-M0/M3 1055*700*336mm 93kg
06 07
used to move the inverter.
Nameplate.
used to move the inverter.
used to hang the inverter onto the mounting-bracket.
L
H
W
7
5
6
3
4
2
1
2.2.4LEDboard
LED board
Five LEDs are set on the board of the inverter, as shown in Fig.
Table 2.2.4 LED lamp description
LED lamp Color LED state Meaning
Green
Always on
Flicker in cycle
Off
Blue Flicker for once
Off
Blue
Always on
Flicker
Normal grid-connected operation
There is power of DC or AC, but there is no
grid-connected operation.
AC and DC are both disconnected with power.
Communication for once
No signal
Bluetooth communication is connected.
Bluetooth communication is not connected.
User Manual User Manual

figure 2-3 Circuit diagram
08 09
DC1
+
-
DC10
+
-
Current
Monitoring DCswitch DCSPD
DCEMI
Filter
MPPT
(Boost 1)
MPPT
(Boost 10)
ACSPD
DCBus InverterCircuit
(DC/AC)
L1
L2
L3
PE
AC
Filter
AC
Relays
ACEMI
Filter
The inverter is equipped with the following functions:
Conversion function
The inverter converts the DC current into grid-compatible AC current and feeds the AC
current into the grid.
The inverter logs running information, error records, etc.
The inverter provides various settable parameters. Users can set parameters via
the APP to meet the requirements and optimize the performance.
The inverter is designed with standard RS485 communication interfaces.
The standard RS485 communication interfaces are used to establish communication
connection with monitoring devices and upload monitoring data by using
communication cables.
After communication connection is established, users can view inverter information or
set inverter parameters through the KstarCloud.
The protective functions are integrated in the inverter, including anti-island protection,
LVRT/ZVRT, DC reversed polarity protection, AC short circuit protection, leakage
current protection, DC overvoltage/overcurrent protection,etc.
The DC switch is used to disconnect the DC current safely whenever necessary.
The KSG-120CL-M0/M3 is equipped with four DC switches,each DC switch controls its
corresponding DC terminals.
Turn the DC switches to the ON position before restarting the inverter.
The MPPT is utilized for DC input to ensure the maximum power from the PV array
at different PV input conditions. The inversion circuit converts the DC power into AC
power and feeds the AC power into the utility grid through the AC terminal. The
protection circuit is equipped to ensure the safe operation of the device and
personal safety.
The following figure shows the main circuit of the inverter.
Table 2.2.4 LED lamp description
LED lamp Color LED state Meaning
Yellow
Red
Green
Low insulation resistance
Normal insulation resistance
Low-level alarm
Middle-level alarm
High-level alarm
In maintenance
No abnormal state
Always on
Off
Slow flicker
Fast flicker
Always on
Always on
OFF
User Manual User Manual
KSG-120CL-M3 inverter is equipped with 7 MPPT.