Sungrow SG2K-S User manual

SG2-8K-UEN-Ver13-202003Version：1.3
User Manual
SG2K-S / SG2K5-S / SG3K-S/
SG3K-D / SG5K-D / SG8K-D
PV Grid-Connected
Inverter

I
All Rights Reserved
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”).
Trademarks
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.
Software Licenses
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: No.1699 Xiyou Rd., New & High Tech Zone, Hefei, 230088, China.
Email: [e-mail]
Tel: [phone]
Website: www.sungrowpower.com

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 www.sungrowpower.com or on the webpage of the respective
component manufacturer.
Validity
This manual is valid for the following inverter models:
SG2K-S
SG2K5-S
SG3K-S
SG3K-D
SG5K-D
SG8K-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.
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.

III
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.

IV
Contents
About This Manual....................................................................II
1Safety....................................................................................1
1.1 PV Panels..................................................................................1
1.2 Utility Grid..................................................................................1
1.3 Inverter.......................................................................................2
1.4 Skills of Qualified Personnel......................................................3
2Product Description............................................................4
2.1 Intended Use .............................................................................4
2.2 Product Introduction...................................................................5
2.2.1 Model Description ..................................................................... 5
2.2.2 Appearance............................................................................... 5
2.2.3 Dimensions ............................................................................... 7
2.2.4 LCD Panel................................................................................. 7
2.3 Function Description..................................................................8
2.3.1 Basic Function........................................................................... 8
2.3.2 External Demand Response ..................................................... 8
2.3.3 Reactive Power Regulation....................................................... 9
2.3.4 Power Quality Response........................................................... 9
3Unpacking 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 .......................................................................13
4Mechanical Mounting........................................................14
4.1 Safety during Mounting............................................................14
4.2 Location Requirements............................................................14
4.2.1 Installation Environment Requirements................................... 15
4.2.2 Carrier Requirements.............................................................. 15

V
4.2.3 Installation Angle Requirements ..............................................15
4.2.4 Installation Clearance Requirements.......................................16
4.3 Installation Tools......................................................................16
4.4 Installing the Inverter...............................................................18
5Electrical Connection .......................................................21
5.1 Safety Instructions...................................................................21
5.2 Terminal Description................................................................22
5.3 Cable Requirements................................................................22
5.4 Additional Grounding Connection............................................23
5.4.1 Additional Grounding Requirements........................................23
5.4.2 Connection Procedure.............................................................23
5.5 AC Cable Connection..............................................................24
5.5.1 AC Side Requirements............................................................24
5.5.2 Assembling the AC Connector.................................................25
5.5.3 Installing the AC Connector.....................................................26
5.6 DC Cable Connection..............................................................27
5.6.1 PV Input Configuration ............................................................28
5.6.2 Assembling the PV Connector.................................................30
5.6.3 Installing the PV Connector.....................................................32
5.7 RS485Communication Connection .........................................33
5.8 Energy Meter Connection........................................................33
5.9 DRM Connection.....................................................................35
6Commissioning .................................................................38
6.1 Inspection before Commissioning ...........................................38
6.2 Button Function....................................................................... 38
6.3 Commissioning Procedure......................................................39
7LCD Operation...................................................................40
7.1 Button Function.......................................................................40
7.2 Main Screen............................................................................40
7.3 Menu Structure........................................................................42
7.4 Viewing Running Info ..............................................................43
7.5 Advanced Settings ..................................................................43

VI
7.5.1 Inputting the Password............................................................ 43
7.5.2 Setting Protective Parameters................................................. 44
7.5.3 Zero-export Setting ................................................................. 47
7.5.4 Adding the Existing Inverter..................................................... 48
7.5.5 PF Setting............................................................................... 48
7.5.6 Parameter Reset..................................................................... 48
7.5.7 DRM Switch Setting ................................................................ 48
7.5.8 GND Detection........................................................................ 49
7.5.9 Energy Adjustment.................................................................. 49
7.5.10 Setting Communication Parameter........................................ 49
7.5.11 Ethernet Configuration .......................................................... 49
7.5.12 Arc Detection......................................................................... 50
7.6 Starting/Stopping the Inverter...................................................50
7.7 Viewing the Error Record.........................................................50
7.8 Setting the Time.......................................................................50
7.9 Setting the Country..................................................................51
7.10 Viewing Device Info .................................................................53
8System Decommissioning...............................................54
8.1 Disconnecting the Inverter.......................................................54
8.2 Dismantling the Inverter...........................................................55
8.3 Disposing of the Inverter..........................................................55
9Troubleshooting and Maintenance..................................56
9.1 Troubleshooting.......................................................................56
9.1.1 LED Indicator .......................................................................... 56
9.1.2 Errors on the App or LCD Screen............................................ 56
9.2 Maintenance ............................................................................62
10 Appendix............................................................................64
10.1 Technical Data .........................................................................64
10.1.1 –S Series .............................................................................. 64
10.1.2 –D Series .............................................................................. 66
10.2 Quality Assurance....................................................................68

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.
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.

1 Safety User Manual
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
and AC connector when the
inverter is running.
Disconnect the AC circuit breaker and set the DC load-break switch
of the inverter to OFF. 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 buttons and the DC switch can safely be touched at any time.

User Manual 1 Safety
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.
Warning Label
Label
Description
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!
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

4
2 Product Description
2.1 Intended Use
SG2K-S / SG2K5-S / SG3K-S / SG3K-D / SG5K-D / SG8K-D, a transformerless
single-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.
Any use other than the intended use is not permitted.
The inverter must only be operated with PV strings of protection class
II in accordance with IEC 61730, application class A. It is not permitted
for the positive pole or the negative pole of the PV strings to be
grounded. This can cause the inverter to be destroyed.
Damages to the product due to a faulty or damaged PV installation are
not covered by warranty.
The intended use example is shown in Fig. 2-1.
A B C D
E
Export powerOutput power
PV power
Load power
Fig. 2-1 Application in a PV Power System
Item
Description
Remarks
A PV strings
Monocrystalline silicon, polycrystalline silicon
and thin-film without grounding.
B Inverter
SG2K-S, SG2K5-S, SG3K-S, SG3K-D,
SG5K-D and SG8K-D.

User Manual 2 Product Description
5
Item
Description
Remarks
C
Single-phase energy
meter (optional)
Measures the export power and communicates
with the inverter via an RS485 connection.
D
Utility grid
Grid earthing system types: TT, TN.
E
Household load
Devices that consume energy.
For the TT utility grid, the N line voltage to ground must be 30 V or less.
2.2 Product Introduction
2.2.1 Model Description
The model description is as follows (Take SG3K-S as an example):
SG 3K S
-
S: single MPPT, D: dual MPPTs
Code of power level
Code of PV grid-connected inverter
Tab. 2-1 Power Level Description
2.2.2 Appearance
The image shown here is for reference only. The actual product you receive
may differ.
Model
Nominal Output Power
Nominal Grid Voltage
SG2K-S
2000 W
230 Vac (single phase)
SG2K5-S 2500 W
SG3K-S 3000 W
SG3K-D 3000 W
SG5K-D 4990 W
SG8K-D 8000 W

2 Product Description User Manual
6
2
3456
1
7
8
Fig. 2-2 Inverter Appearance (SG5K-D for reference)
Item
Name
Description
1 PV terminals
Positive and negative DC input connectors.
One or two or three pairs, depending on inverter
model.
2
DC switch
To disconnect the DC current safely.
3 RS485 terminal
To connect the communication module, such as
Wi-Fi module.
4
Meter | DRM
terminal
Connections to the energy meter and external
Demand Response Enabling Device (DRED).
5
Additional grounding
terminal
For reliable grounding.
6
AC terminal
To feed power into the utility grid.
7 LCD panel
The display and two buttons can be used to
access current operating data or change inverter
settings.
8 Mounting rack
For mounting the inverter to the wall mounting
bracket.

User Manual 2 Product Description
7
2.2.3 Dimensions
WD
H
Fig. 2-3 Dimensions of the Inverter
Tab. 2-2 Dimensions and Weight
Model
W (mm)
H (mm)
D (mm)
SG2K-S / SG2K5-S / SG3K-S
300
370
125
SG3K-D / SG5K-D
360
390
133
SG8K-D
360
390
148
2.2.4 LCD Panel
The LCD panel with a screen, an indicator and two buttons is on the front of the
inverter.
31 2 2
Fig. 2-4 LCD Panel
No.
Name
Description
1
LCD screen
Display and access current operating data or change
inverter settings.
2
Buttons
ESC / ENT.
View or set parameters via the buttons. For detailed
functions, see Tab. 6-1.
3
Indicator
Green / red.
User can observe the color and blinking frequency to get
the current state of the inverter. For detailed definition,
see Tab. 6-2.

2 Product Description User Manual
8
2.3 Function Description
2.3.1 Basic Function
Conversion function
The inverter converts DC power from the PV array into grid-compliant AC
power and feeds it into the utility grid.
Data storage
Inverter logs essential data including running information and error records.
Parameter configuration
Inverter provides various parameter configurations for optimal operation. You
can set the country via the iSolarCloud App or the cloud server, in case you
require further, please contact Sungrow.
Communication interface
You can choose the RS485 terminal for connecting a communication module
to the PV system, such as Wi-Fi module.
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.
Further information on the communication module can be found in the
respective Quick Installation Guide.
Earth fault alarm
If an earth fault occurs, the error code will be displayed on the LCD screen.
The buzzer inside the inverter will beep to signal an external alarm.
Protective function
The protective functions are integrated in the inverter, including short circuit
protection, grounding insulation resistance surveillance, residual current
protection, anti-islanding protection, DC overvoltage/ over-current protection,
etc.
2.3.2 External Demand Response
The inverter provides a RJ45 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. The following table lists the DRMs supported
by the inverter.

User Manual 2 Product Description
9
Tab. 2-3 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 % of the rated power, but subject
to the constraints from other active DRMs.
2.3.3 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.
2.3.4 Power Quality Response
The inverter supports two power quality response modes.
Power response for voltage variations
Define the response curve with four reference voltages, which can be set via
the LCD menu. The power output will vary in response to the voltage curve.
Refer to “7.5.2 Setting Protective Parameters” for details.
Power response for frequency variations
The inverter provides built-in over- / under-frequency protective threshold
values. Refer to “Tab. 7-8 Protective Parameters of Grid Standards” for
details. When the grid frequency is lower than the under-frequency limit or
higher than the over-frequency limit, the inverter will be disconnected from the
grid.
When there is an increase in grid frequency which exceeds 50.25 Hz, the
inverter will reduce the power output linearly with an increase of frequency until
the end value (52.00 Hz) is reached.

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 supplier in case there is any damage or
incompleteness.
Do not dispose of the original packing case. It is recommended to store the
inverter in it.
3.2 Identifying the Inverter
The nameplate can be found on both the inverter and the packing case. It
provides information on the model of inverter, important specifications, marks of
certification institutions, and serial number which are available and identified by
SUNGROW. Take SG5K-D as an example:

User Manual 3 Unpacking and Storage
11
1
2
4
工作温度范围
型号
M o d e l
S / N
序列号
D C - I n p u t
直流输入
最大输入电压
Min. MPP Voltage
最小 MPP 电压
Max. MPP Voltage
最大 MPP 电压
Max. Input Current
最大输入电流
Isc PV
最大短路电流
A C -Output
交流输出
额定输出电压
额定输出频率
Rated Output Power
额定输出功率
Max. Output Current
最大输出电流
Max. Apparent Power
最大视在功率
Power Factor Range
功率因数范围
安全等级
过压等级
防护等级
w w w. s u n g r o w p o w e r. c o m
S U N G R O W P O W E R S U P P L Y C O . , L T D .
中 国 制 造
M a d e i n C h i n a
阳光电源股份有限公司
SG5K-D
D C
D C
D C
D C
I II [A C ] , I I [ D C ]
D C
A**********
Password
密码 ********
600 V
90 V
560 V
25(12.5/12.5)A
30(15/15)A
230 V
50 Hz
AC 21.7 A
4.999 kW
4.999 kVA
I
IP65
-25℃…60℃
光伏并网逆变器
G R I D-C O N N E C T E D I N V E R TE R
0.8 Lead...0.8 Lag
Max. Input Voltage
Rated Output Voltage
Rated Output Frequency
Safety Class
Overvoltage Category
Enclosure
Ambient Temperature
P V
Fig. 3-1 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 model
3
Instructions and marks of
conformity
2 Technical data of inverter 4
Company name, website and
country of manufacture
Tab. 3-1 Description of Icons on the Nameplate
Icon
Description
RCM 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.
TÜV mark of conformity.
CE mark of conformity.

3 Unpacking and Storage User Manual
12
3.3 Scope of Delivery
Standard Delivery
Inverter Wall-mounting bracket
Communication connector
Documents
M4x80 screw set
b
PV connector set
b
AC connector set
Wi-Fi module
M4x10 grounding screw
c
a
Fig. 3-2 Delivery Contents
a) The inverter figures in this document have been created for SG5K-D
unless otherwise specified.
b) The documents include the Quick User Manual, quality certificates,
packaging list and product test reports.
c) One or two or three pairs, depending on inverter model.
Optional Accessory
The Energy Meter is not included in
the inverter packaging but, if
ordered, delivered separately.
More detailed information on the
Energy Meter can be found in the
respective Quick Installation Guide.
Single-phase meter