Sungrow SG5KTL-MT User manual

SSGG55__66KKTTLL--MMTT&&SSGG88__1100__1122KKTTLL--
MMPPVV GGrriidd--ccoonnnneecctteedd IInnvveerrtteerrUUsseerr
MMaannuuaallSSGG55––1122KK((WWWW))--UUEENN--
VVeerr1155––220022000044 VVeerrssiioonn::11..55
SG5–12K(WW)-UEN-Ver15–202004 Version:1.5
SG5_6KTL-MT&SG8_10_12KTL-M
PPVV GGrriidd--ccoonnnneecctteedd IInnvveerrtteerr
UUsseerr MMaannuuaall

I
All Rights Reserved
AAllll RRiigghhttss RReesseerrvveedd
No part of this document can be reproduced in any form or by any means without the
prior written permission of Sungrow Power Supply Co., Ltd(hereinafter "SUNGROW").
TTrraaddeemmaarrkkss
and other Sungrow trademarks used in this manual are owned by
Sungrow Power Supply Co., Ltd.
All other trademarks or registered trademarks mentioned in this document are owned
by their respective owners.
SSooffttwwaarree LLiicceennsseess
•It is prohibited to use data contained in firmware or software developed by
SUNGROW, 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 SUNGROW.
Sungrow Power Supply Co., Ltd.
Address: NNoo..11669999 XXiiyyoouu RRdd..,, NNeeww && HHiigghh TTeecchh ZZoonnee,, HHeeffeeii,, 223300008888,, CChhiinnaa..
Email: iinnffoo@@ssuunnggrrooww..ccnn
Tel: [phone]
Website: wwwwww..ssuunnggrroowwppoowweerr..ccoomm

II
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
wwwwww.. ssuunnggrroowwppoowweerr.. ccoomm or on the webpage of the respective component
manufacturer.
VVaalliiddiittyy
This manual is valid for the following inverter models:
•SG5KTL-MT
•SG6KTL-MT
•SG8KTL-M
•SG10KTL-M
•SG12KTL-M
They will be referred to as “inverter” hereinafter unless otherwise specified.
TTaarrggeett GGrroouupp
This manual is intended for:
•qualified personnel who are responsible for the installation and commissioning of the
inverter; and
•inverter owners who will have the ability to interact with the inverter.
HHooww ttoo UUssee TThhiiss MMaannuuaall
Read the manual and other related documents before performing any operation on the
inverter. Documents must be stored carefully and be available at all times.
Contents may be periodically updated or revised due to product development. The
information in this manual is subject to change without notice. The latest manual can be
acquired atwwwwww..ssuunnggrroowwppoowweerr..ccoomm.
SSyymmbboollss
Safety instructions will be highlighted with the following symbols.
SSyymmbbooll EExxppllaannaattiioonn
Indicates a hazard with a high level of risk that, if not avoided, 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.

III
SSyymmbbooll EExxppllaannaattiioonn
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.

V
CCoonntteennttss
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 Description .................................................................................... 4
2.1 Intended Use................................................................................................ 4
2.2 Product Introduction..................................................................................... 5
2.2.1 Model Description............................................................................... 5
2.2.2 Appearance........................................................................................ 6
2.2.3 Dimensions ........................................................................................ 7
2.2.4 LED Indicator Panel ............................................................................ 7
2.2.5 DC Switch........................................................................................... 8
2.3 Circuit Diagram ............................................................................................ 9
2.4 Function Description .................................................................................... 9
3 Unpacking and Storage ........................................................................... 12
3.1 Unpacking and Inspection.......................................................................... 12
3.2 Identifying the Inverter................................................................................ 12
3.3 Scope of Delivery....................................................................................... 13
3.4 Inverter Storage ......................................................................................... 14
4 Mechanical Mounting .............................................................................. 15
4.1 Safety during Mounting .............................................................................. 15
4.2 Location Requirements .............................................................................. 15
4.2.1 Installation Environment Requirements ............................................. 15
4.2.2 Carrier Requirements........................................................................ 16
4.2.3 Installation Angle Requirements ........................................................ 16
4.2.4 Installation Clearance Requirements ................................................. 17
4.3 Installation Tools......................................................................................... 18
4.4 Moving the Inverter .................................................................................... 19

VI
4.5 Installing the Inverter .................................................................................. 19
4.6 Connecting the Communication Module (Optional) ..................................... 20
5 Electrical Connection ............................................................................... 21
5.1 Safety Instructions...................................................................................... 21
5.2 Terminal Description................................................................................... 21
5.3 Additional Grounding Connection ............................................................... 22
5.3.1 Additional Grounding Requirements.................................................. 22
5.3.2 Connection Procedure...................................................................... 23
5.4 AC Cable Connection ................................................................................. 24
5.4.1 AC Side Requirements...................................................................... 24
5.4.2 Assembling the AC Connector .......................................................... 25
5.4.3 Installing the AC Connector............................................................... 27
5.5 DC Cable Connection................................................................................. 28
5.5.1 PV Input Configuration...................................................................... 28
5.5.2 DC Side Requirements...................................................................... 29
5.5.3 Assembling the PV Connector........................................................... 30
5.5.4 Installing the PV Connector ............................................................... 31
5.6 RS485 Communication System.................................................................. 32
5.7 GPRS Communication System (Optional) ................................................... 34
5.8 Ethernet Communication System (Optional) ............................................... 35
5.9 Smart Energy Meter Connection (Optional)................................................. 35
5.9.1 On the Smart Energy Meter Side....................................................... 35
5.9.2 On the Inverter Side .......................................................................... 36
6 Commissioning ........................................................................................... 37
6.1 Inspection before Commissioning............................................................... 37
6.2 Commissioning Procedure ......................................................................... 37
7 iSolarCloud App .......................................................................................... 38
7.1 Brief Introduction........................................................................................ 38
7.2 Download and Install.................................................................................. 38
7.3 Login.......................................................................................................... 39
7.3.1 Requirements................................................................................... 39
7.3.2 Login Steps ...................................................................................... 39
7.4 Function Overview ..................................................................................... 40
7.5 Home......................................................................................................... 41
7.6 Chart.......................................................................................................... 42
7.7 More.......................................................................................................... 43

VII
7.7.1 Operation Parameters....................................................................... 44
7.7.2 Protection Parameter........................................................................ 48
7.7.3 Firmware Update.............................................................................. 49
7.7.4 Feed-in Limitation (Optional)............................................................. 50
8 System Decommissioning ...................................................................... 52
8.1 Disconnecting the Inverter.......................................................................... 52
8.2 Dismantling the Inverter.............................................................................. 53
8.3 Disposal of the Inverter............................................................................... 53
9 Troubleshooting and Maintenance ...................................................... 54
9.1 Troubleshooting ......................................................................................... 54
9.2 Maintenance.............................................................................................. 61
10 Appendix .................................................................................................... 63
10.1 Technical Data ......................................................................................... 63
10.2 Quality Assurance .................................................................................... 67
10.3 Contact Information ................................................................................. 68

1
1Safety
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; or
•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
corresponding chapters.
•The safety instructions in this manual cannot cover all the precautions that
should be followed. Perform operations considering actual onsite
conditions.
•SUNGROW 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.
1.2 Utility Grid
Please follow the regulations related to the utility grid.

2
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.
1.3 Inverter
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 10 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.
1 Safety User Manual

3
Only qualified personnel can perform the country setting.
•Unauthorized alteration of the country setting may cause a breach of the
type-certificate marking.
•Risk of inverter damage due to electrostatic discharge (ESD).
By touching the electronic components, you may damage the inverter. For
inverter handling, be sure to:
•avoid any unnecessary touching;and,
•wear a grounding wristband before touching any connectors.
WWaarrnniinngg LLaabbeell
LLaabbeell DDeessccrriippttiioonn
Disconnect the inverter from all the external power sources
before service!
Do not touch live parts until 10 minutes after disconnection
from the power sources.
There is a danger from a hot surface that may exceed 60 ℃.
Danger to life due to high voltages!
Only qualified personnel can open and service the inverter.
Check the user manual before service!
1.4 Skills of Qualified Personnel
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
User Manual 1 Safety

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2Product Description
2.1 Intended Use
SG5KTL-MT/SG6KTL-MT/SG8KTL-M/SG10KTL-M/SG12KTL-M; a transformerless 3-
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".
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.
Inverter is applicable only to the grid-connected PV system. Any other usage is
strictly forbidden.
ffiigguurree 22--11 Inverter application in PV power system
IItteemm DDeessccrriippttiioonn NNoottee
APV strings Monocrystalline silicon, polycrystalline silicon, and thin-film
without grounding
B Inverter SG5KTL-MT/SG6KTL-MT/SG8KTL-M/SG10KTL-M/
SG12KTL-M
CMetering
device Meter cupboard with power distribution system
DUtility grid TN-C，TN-C-S，TT，TN-S
The following figure shows the common grid configurations.

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2.2 Product Introduction
2.2.1 Model Description
The model description is as follows (Take SG5KTL-MT as an example):
table 2-1 Power level description
MMooddeell NNoommiinnaall OOuuttppuuttPPoowweerr NNoommiinnaall GGrriidd VVoollttaaggee
SG5KTL-MT 5000W
3 / N / PE, 230 / 400 V
SG6KTL-MT 6000W
SG8KTL-M 8000W
SG10KTL-M 10000W
SG12KTL-M 12000W
User Manual 2 Product Description

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2.2.2 Appearance
ffiigguurree 22--22 Appearance
* The image shown here is for reference only. The actual product you receive may differ.
NNoo.. NNaammee DDeessccrriippttiioonn
1LED indicator panel HMI interface to indicate the present working state
of the inverter.
2 DC switch Protective components for safely disconnecting
DC side current.
3Electrical connection
area
Includes DC terminal, AC terminal and
communication terminal.
4Additional grounding
terminal User can connect this terminal as per requirements.
5Hanger Hang the inverter on the wall-mounting bracket.
2 Product Description User Manual

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2.2.3 Dimensions
ffiigguurree 22--33 Dimensions of the inverter(in mm)
2.2.4 LED Indicator Panel
As an HMIe, the LED indicator panel on the front of the inverter can indicate the present
working state of the inverter.
ffiigguurree 22--44 LED indicator panel
table 2-2 State description of the LED indicator panel
LLEEDD iinnddiiccaattoorr LLEEDD ccoolloorr LLEEDD ssttaattee DDeeffiinniittiioonn
Bluetooth
Blue
ON The Bluetooth has been connected,
but there is no data exchange
Flashing The Bluetooth has been connected,
and there is data exchange
User Manual 2 Product Description

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LLEEDD iinnddiiccaattoorr LLEEDD ccoolloorr LLEEDD ssttaattee DDeeffiinniittiioonn
OFF No device is connected to the inverter
through the bluetooth
Communicatio-
nBlue
Flashing
The communication cable or
communication module has been
connected, and there is data
exchange in the communication
channel
OFF
Neither the communication cable nor
the communication module is
connected, or there is no data
exchange in the communication
channel
Fault/PID
Red
ON A fault has occurred (the device
cannot feed power into the grid)
Flashing The fault is being restored
Green
ON PID function is running
Flashing PID function exception
-OFF No alarm or fault has occurred and
PID function is not enabled
Earth
impedance
abnormal Red ON
An earthing short circuit has occurred
(the device cannot feed power into
the grid)
OFF No fault occurs
Normal
operation Green
ON The device is connected to the grid
and operates normally
Flashing
The DC or AC side has been powered
on and the device is in standby or
startup state (has not fed power into
the gird)
OFF Both the AC and DC sides have been
powered off, or a fault occurs
2.2.5 DC Switch
The DC switch is used to disconnect the DC current safely whenever necessary.
2 Product Description User Manual

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The inverter operates automatically when input and output requirements are met. Rotate
the DC switch to the “OFF” position to stop the inverter when a fault occurs or when
you need to stop the inverter.
Turn the DC switch to the “ON” position before restarting the inverter.
2.3 Circuit Diagram
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 to
the utility grid through the AC terminal. The protection circuit is equipped to ensure the
safe operation of the device and personal safety.
The DC switch is used to disconnect the DC current safely. The inverter is provided with
standard RS485 ports for communication. Users can check running data and set related
parameters via the iSolarCloud App.
"figure 2-5 Circuit diagram"shows the main circuit of the inverter.
ffiigguurree 22--55 Circuit diagram
2.4 Function Description
CCoonnvveerrssiioonn ffuunnccttiioonn
The inverter converts the DC current into grid-compatible AC current and feeds the AC
current into grid.
DDaattaa ssttoorraaggee
The inverter logs running information, error records, etc.
PPaarraammeetteerr sseettttiinngg
The inverter provides various settable parameters. Users can set parameters via the
App to meet the requirements and optimize the performance.
CCoommmmuunniiccaattiioonn iinntteerrffaaccee
The inverter is designed with standard RS485 communication interfaces and
communication accessory port.
User Manual 2 Product Description

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•The standard RS485 communication interfaces are used to establish communication
connection with monitoring devices and upload monitoring data by using
communication cables.
•The communication accessory port is used to connect communication module
manufactured by SUNGROW, and upload monitoring data by means of wireless
communication.
The inverter can be connected to communication devices via either of the two
interfaces. After communication connection is established, users can view inverter
information or set inverter parameters through the iSolarCloud.
It is recommended to use the communication module from SUNGROW. Using
a device from other companies may lead to communication failure or other
unexpected damage.
PPrrootteeccttiioonn FFuunnccttiioonn
•Short-circuit protection
•Ground insulation resistance monitoring
•Grid voltage monitoring
•Grid frequency monitoring
•Leakage current protection
•Monitoring on DC injection of AC output current
•Anti-islanding protection
•Ambient temperature monitoring
•DC over-voltage protection
•Over-current protection
•Power module over-temperature protection
•PID recovery function (optional)
PPIIDD RReeccoovveerryy FFuunnccttiioonn ((OOppttiioonnaall))
After the PID function is enabled, the voltage to ground of all PV modules is greater than
0, that is, the PV module-to-ground voltage is a positive value.
2 Product Description User Manual