Sungrow SG2KTL-S User manual

SG2_3_5KTL V21-UEN-Ver20-201608 Version：2.0
User Manual
SG2KT
L
-S
/
SG3KT
L
-S
/
SG3KT
L
-D
/
SG5KT
L
-D
PV Grid-Connected Inverter

I
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 www.sungrowpower.com or on the webpage of the device manufacturer.
Applicability
This manual is applicable to the following inverter types:
 SG2KTL-S
 SG3KTL-S
 SG3KTL-D
 SG5KTL-D
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; and
 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 any work on the inverter is
carried out. Documents must be stored carefully and be available at all times.
All rights to the content of this manual are owned by Sungrow Power Supply Co., Ltd.
(hereinafter “SUNGROW”). No part of this document can be modified, distributed,
reproduced or published in any form or by any means without prior written
permission from SUNGROW.
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 at www.sungrowpower.com.

II
Symbols
Safety instructions will be highlighted with the following symbols.
Symbol Explanation
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.
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.

III
Contents
About This Manual ..........................................................................I
1Safety........................................................................................1
1.1General Safety.........................................................................................................1
1.2Inverter ......................................................................................................................2 
1.3Skills of Qualified Personnel...............................................................................3
2Product Introduction ...............................................................4
2.1Intended Use ...........................................................................................................4
2.2Inverter ......................................................................................................................5 
2.2.1 Appearance .................................................................................................................5
2.2.2 Dimensions and Weight .........................................................................................6
2.2.3 LED Indicator Panel ..................................................................................................6
2.3Function Description ............................................................................................7
2.4AS4777:2015 Compliant......................................................................................8
2.4.1 External Demand Response..................................................................................8
2.4.2 Reactive Power Regulation....................................................................................9
2.4.3 Power Quality Response.........................................................................................9
3Unpacking and Storage.........................................................10
3.1Unpacking and Inspection ..............................................................................10
3.2Identifying the Inverter..................................................................................... 11
3.3Delivery Contents ...............................................................................................12
3.4Storage of Inverter.............................................................................................. 12
4Mechanical Mounting............................................................13
4.1Safety during Mounting ................................................................................... 13
4.2Location Requirements..................................................................................... 13
4.3Installing the Inverter........................................................................................16
5Electrical Connection.............................................................18
5.1Terminal Description ......................................................................................... 19

IV
5.2Connection Overview....................................................................................... 19
5.3Grounding the Inverter .................................................................................... 20
5.4Grid Connection.................................................................................................. 21
5.4.1 AC Side Requirements ..........................................................................................21
5.4.2 Assembling the AC Connector...........................................................................22
5.4.3 Installing the AC Connector ...............................................................................23
5.5PV Connection..................................................................................................... 23
5.5.1 PV Inputs Configuration ......................................................................................24
5.5.2 Assembling the PV Connector...........................................................................26
5.5.3 Installing the PV Connector................................................................................27
6Communication......................................................................29
6.1Communication Terminal ................................................................................ 29
6.2Distance Requirements .................................................................................... 30
6.2.1 Scenario 1: No Barriers..........................................................................................30
6.2.2 Scenario 2: On Different Floors .........................................................................31
6.2.3 Scenario 3: In Different Rooms on the Same Floor....................................32
6.3SolarInfo Home APP........................................................................................... 32
6.3.1 Acquisition and Installation................................................................................32
6.3.2 Visiting Inverter via “[Direct visit]” Mode ....................................................... 35
6.3.3 Visiting Inverter via “Remote [Login]” Mode ................................................ 37
7Commissioning.......................................................................39
7.1Inspection before Commissioning............................................................... 39
7.2Commissioning Procedure.............................................................................. 39
8System Decommissioning .....................................................41
8.1Disconnecting the Inverter............................................................................. 41
8.2Dismantling the Inverter.................................................................................. 42
8.3Disposing of the Inverter................................................................................. 42
9Troubleshooting and Maintenance ......................................43
9.1Troubleshooting ................................................................................................. 43
9.1.1 For LED Indicator ....................................................................................................43
9.1.2 For the Faults on the APP or Screen ................................................................ 44

V
9.2Routine Maintenance........................................................................................49
10FAQs for SolarInfo Wi-Fi.........................................................51
10.1Cannot Find Wi-Fi Signal of Inverter ............................................................51
10.2Too Weak Wi-Fi Signal of Inverter .................................................................. 51
10.3Cannot Find Wi-Fi Network of Router..........................................................53
10.4Cannot Connect to Wi-Fi Network of Router ............................................ 54
10.5Transmission Signal Strength of Different Materials.............................. 56
10.6Cannot Find Running Data on Server.......................................................... 56
11Appendix ................................................................................57
11.1Technical Data ...................................................................................................... 57
11.2Exclusion of Liability ..........................................................................................59
11.3About Us ................................................................................................................ 60

1
1 Safety
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 properties belonging to the operator or a third
party.
All detailed work-related safety warnings and notes will be specified at critical points
in this manual.
1.1 General Safety
PV Panels
Please follow the safety instructions related to the PV array.
Lethal voltage!
PV strings will produce electrical power when exposed to sunlight and can
cause a lethal voltage and an electric shock.
Only qualified personnel can perform the wiring of the PV panels.
Utility Grid
Please follow the regulations related to the utility grid.
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 Safety User Manual
2
1.2 Inverter
There is a warning label on the inverter body.
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°C.
Danger to life due to high voltages!
Only qualified personnel can open and service the inverter.
Check the user manual before service!
Danger to life from electric shocks due to live voltage
 Do not open the enclosure at any time. Loss of any or all the rights may follow
if otherwise.
 When the enclosure lid is removed, live components can be touched which
can result in death or serious injury due to electric shock.
Danger to life from electric shock due to damaged inverter
 Only operate the inverter when it is technically faultless and in a safe state.
 Operating a damaged inverter can lead to hazardous situations that can result
in death or serious injuries due to electric shock.
Risk of inverter damage or personal injury
DO not pull out the PV connectors while the inverter is under AC loads!
De-energize the inverter from dual power sources and verify that there is no
voltage.

User Manual 1 Safety
3
All the warning labels and nameplate on the inverter body:
 must be clearly visible; and
 must not be removed, covered or pasted.
Risk of burns due to hot components!
DO not touch the hot parts (such as heat sink) during operation. Only the
LED indicator panel and the optional DC switch can be touched.
Only qualified personnel can change the country setting.
Unauthorized alteration of the country setting may cause a breach of the
type-certificate marking.
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 connections.
1.3 Skills of Qualified Personnel
Qualified personnel must have the following skills:
 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; and
 knowledge of the local regulations and directives.

4
2 Product Introduction
2.1 Intended Use
The inverters, which are single-phase string inverters without transformer, are the
crucial units between the PV array and the utility grid in a PV power system.
The inverter is dedicated to converting the DC power generated by the PV array into
the AC power, which conforms to the parameters of the local utility grid and is fed
into the utility grid. An example about the intended use is shown in Fig. 2-1.
Fig. 2-1 Application in a PV Power System
Item Description Remar
k
s
A PV strings Monocrystalline silicon, polycrystalline silicon and
thin-film without grounding
B Inverter SG2KTL-S, SG3KTL-S, SG3KTL-D or SG5KTL-D
C Metering
device Meter cupboard with power distribution system
D Utility grid Line types: TT, TN
Any use other than the intended use is not permitted.
It is not permitted for the positive pole or the negative pole of the PV strings
to be grounded.

User Manual 2 Product Introduction
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For the TT utility grid, the N line voltage to ground must be less than 30 V.
Do not connect local loads (such as home appliances, lights, motor loads,
etc.) between the inverter and the AC circuit breaker.
2.2 Inverter
2.2.1 Appearance
Fig. 2-2 Inverter Appearance
* The image shown here is for reference only. The actual product you receive may
differ.
Item Name Description
1 LED indicator panel Human-computer interaction interface.
2 DC terminals To connect the PV array. A pair or two pairs.
3 DC switch (optional) To disconnect the DC current safely.
4 RS485 terminal To connect the Wi-Fi module, eShow module,
or ZE100 module.
5 Second PE terminal For reliable grounding.
6 AC terminal To feed power into the utility grid.
7 Mounting rack To hang the inverter to the wall-mounting
bracket.

2 Product Introduction User Manual
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2.2.2 Dimensions and Weight
Fig. 2-3 Dimensions of the Inverter
Tab. 2-1 Dimensions and Weight
Type W(mm) H(mm) D(mm) Net weight(kg)
SG2KTL-S/SG3KTL-S 300 370 125 9
SG3KTL-D/SG5KTL-D 360 390 133 11
2.2.3 LED Indicator Panel
User can observe the color and blinking frequency of the indicator to get the current
state of the inverter.
Fig. 2-4 LED Indicator Panel
For indicator state descriptions, see Tab. 7-1.
The LED indicator will be red and green at the same time when the
inverter is in upgrade status. If in other status, please contact the service
provider for troubleshooting.

User Manual 2 Product Introduction
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2.3 Function Description
Inverter functions can be grouped as follows:
 Conversion function
Inverter converts the DC power into the AC power, which conforms to the grid
requirement of its installation country.
 Data storage
Inverter archives essential data including running information and fault records.
 Parameter configuration
Inverter provides various parameter configurations for optimal operation. You
can set the country by APP, if you need a more professional setting, please
contact SUNGROW.
 Communication interface
You can choose the RS485 terminal for connecting a communication or
monitoring device to the PV system, such as eShow, eShow+, ZE100 and so on.
 Earth fault alarm
If an earth fault occurs, the fault code will be displayed on the LCD screen of
eShow/eShow+/ZE100. The buzzer inside the eShow/eShow+/ZE100 will beep to
signal an external alarm.
 Protection functions include:
− short circuit protection;
− grounding insulation resistance surveillance;
− inverter output voltage surveillance;
− inverter output frequency surveillance;
− residual current protection;
− DC injection of AC output current surveillance;
− anti-islanding protection;
− ambient temperature surveillance;
− DC overvoltage protection;
− overcurrent protection; and
− over-temperature protection.

2 Product Introduction User Manual
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2.4 AS4777:2015 Compliant
The inverter supports the demand response modes (DRMs), the reactive power
regulation, and the power quality response, as specified in the standard AS
4777:2015.
 External Demand Response
 Reactive Power Regulation
 Power Quality Response
For details about the connection and settings, see the Quick User Manual delivered
with the eShow module or ZE100 module.
2.4.1 External Demand Response
The inverter provides a RJ45 port for connecting to the communication module
eShow/eShow+/ZE100 that with a DRM port for connecting to a demand response
enabling device (DRED). The DRED asserts demand respond modes (DRMs). The
inverter detects and initiates a response to the supported demand response
commands within 2 s.
Tab. 2-2 Demand Response Modes (DRMs)
Mode Explanation
DRM0 The inverter is in the state of standby.
DRM5 The export power to the grid is 0%.
DRM6 The export power to the grid is no more than 50% of the rated power.
DRM7 The export power to the grid is no more than 75% of the rated power.
DRM8 The export power to the grid is 100%, but subject to the constraints from
other active DRMs.

User Manual 2 Product Introduction
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2.4.2 Reactive Power Regulation
The inverter is capable of operating in reactive power regulation modes for the
purpose of providing support to the grid. These various operating modes can be
enabled or disabled via the LCD menu.
 PF: Fixed power factor mode.
 Qt: Fixed reactive power mode.
 Q(p): The PF of the inverter output varies in response to the output power of the
inverter.
 Q(u): The reactive power output of the inverter varies in response to the grid
voltage.
2.4.3 Power Quality Response
The inverter supports two power quality response modes, which can be set via the
LCD menu.
 Power derating for voltage variations:
Define the response curve with four reference voltages. The power output or
input will vary in response to the voltage curve.
 Power derating for frequency variations:
Define the response curve with a start frequency and an end frequency. The
inverter will reduce the power output in response to an increase in grid
frequency.

10
3 Unpacking and Storage
3.1 Unpacking and Inspection
The inverter is thoroughly tested and strictly inspected before delivery. Damage
may still occur during shipping. Conduct a thorough inspection after receiving the
device.
1. Check the packaging for any visible damage.
2. Check the inner contents for damage after unpacking.
3. Check the delivery contents for completeness according to the packaging
list.
Contact SUNGROW or the distributor in case of any damaged or missing
components.
It is the best choice to store the inverter in the original packaging. So, do not
dispose of it.
Fig. 3-1 Single Inverter Packaging
Type W (mm) H (mm) D (mm)
SG2KTL-S/SG3KTL-S 500 210 385
SG3KTL-D/SG5KTL-D 530 215 445

User Manual 3 Unpacking and Storage
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3.2 Identifying the Inverter
The nameplate clearly identifies the product. It is attached to the side of the inverter.
Fig. 3-2 Nameplate of Inverter
* The image shown here is for reference only. The actual product you receive may
differ.
Item Description Item Description
1 SUNGROW logo and product
type 3 Marks of certification institutions
2 Technical data 4 Barcode, company name and
origin
Tab. 3-1 Description of Icons on the Nameplate
Icon Description
C-tick mark of conformity.
Do not dispose of the inverter together with household waste.
The inverter does not have a transformer.
Refer to the corresponding instructions.
CE mark of conformity.

3 Unpacking and Storage User Manual
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Icon Description
TUV mark of conformity.
3.3 Delivery Contents
Fig. 3-3 Delivery Contents
a) One pair for the –S series and two pairs for the –D series.
b) The documents include the Quick User Manual, 1 CD, quality certificates,
packaging list and product test reports.
c) It is delivered only for the countries except Australia.
3.4 Storage of Inverter
If you do not install the inverter immediately, choose an appropriate location to
store it.
 Store the inverter in the original packaging with the desiccant inside.
 The storage temperature should be always between -30°C and +85°C, and the
storage relative humidity should be always between 0 and 100%.
 If there is more than one inverter to be stored, the maximum layer is 9.
 The packaging should be upright.