Sungrow SG2K5-S User manual

SG2_2.5_3_5_8K-UEN-Ver11 Version：1.1
User Manual
SG2K-S / SG2K5-S / SG3K-S /
SG3K-D / SG5K-D / SG8K-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 respective
component manufacturer.
Applicability
This manual is applicable to the following inverter types:
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.
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.

II
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.
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
1Safety....................................................................................1
1.1 General Safety..........................................................................1
1.2 Inverter......................................................................................2
1.3 Skills of Qualified Personnel......................................................3
2Product Introduction...........................................................4
2.1 Intended Use.............................................................................4
2.2 Inverter......................................................................................5
2.3 Energy Meter (optional).............................................................7
2.4 Function Description..................................................................8
2.4.1 Basic Function...........................................................................8
2.4.2 External Demand Response......................................................9
2.4.3 Reactive Power Regulation .....................................................10
2.4.4 Power Quality Response.........................................................10
3Unpacking and Storage....................................................11
3.1 Unpacking and Inspection....................................................... 11
3.2 Identifying the Inverter.............................................................12
3.3 Delivery Contents....................................................................13
3.4 Storage of Inverter...................................................................14
4Mechanical Mounting........................................................15
4.1 Safety during Mounting ...........................................................15
4.2 Location Requirements ...........................................................15
4.3 Tools........................................................................................17
4.4 Installing the Inverter...............................................................19
4.5 Installing the Energy Meter......................................................21
5Electrical Connection .......................................................22
5.1 Terminal Description................................................................23
5.2 Grounding the Inverter ............................................................24

IV
5.3 Grid Connection.......................................................................25
5.3.1 AC Side Requirements............................................................ 25
5.3.2 Assembling the AC Connector................................................. 26
5.3.3 Installing the AC Connector..................................................... 27
5.4 PV Connection.........................................................................28
5.4.1 PV Input Configuration............................................................ 28
5.4.2 Assembling the PV Connector................................................. 31
5.4.3 Installing the PV Connector..................................................... 32
5.5 RS485 Connection...................................................................33
5.6 Meter Connection.....................................................................33
5.6.1 On the Meter Side................................................................... 34
5.6.2 On the Inverter Side................................................................ 36
5.7 DRM Connection to an External Device...................................37
6Commissioning .................................................................39
6.1 Inspection before Commissioning............................................39
6.2 Button Function........................................................................39
6.3 Commissioning Procedure.......................................................40
7LCD Operation...................................................................41
7.1 Button Function........................................................................41
7.2 Main Screen.............................................................................41
7.3 Menu Structure ........................................................................43
7.4 Viewing Running Info...............................................................44
7.5 Advanced Settings...................................................................44
7.5.1 Inputting the Password............................................................ 44
7.5.2 Setting Protective Parameters................................................. 44
7.5.3 Zero-export Setting ................................................................. 48
7.5.4 Adding the Existing Inverter..................................................... 48
7.5.5 PF Setting............................................................................... 48
7.5.6 Parameter Reset..................................................................... 49
7.5.7 DRM Switch Setting ................................................................ 49
7.5.8 GND Detection........................................................................ 49
7.5.9 Energy Adjustment.................................................................. 49

V
7.5.10 Setting Communication Parameter........................................49
7.5.11 Ethernet Configuration...........................................................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
8Troubleshooting and Maintenance..................................54
8.1 Troubleshooting.......................................................................54
8.1.1 LED Indicator ..........................................................................54
8.1.2 Errors on the App or LCD Screen............................................54
8.2 Routine Maintenance ..............................................................60
9System Decommissioning ...............................................62
9.1 Disconnecting the Inverter.......................................................62
9.2 Dismantling the Inverter ..........................................................63
9.3 Disposing of the Inverter .........................................................63
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.
1.1 General Safety
PV Panels
Please follow the safety instructions related to the PV strings.
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. Unauthorized opening will void
guarantee and warranty claims and in most cases terminate the operating
license.

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.
All the warning labels and nameplate on the inverter body
must be
clearly visible and must not be removed, covered or pasted.

User Manual 1 Safety
3
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 o
f the inverter to OFF. Wait 10 minutes for the internal
capacitors to discharge. Verify that there is no voltage or current before
pulling any connector.
Risk of burns due to hot components!
Do not touch any hot parts (such as heat sink) during operation. Only
the buttons and the optional 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.
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.
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 strings and the utility grid in a PV power
system.
The inverter converts DC power from the PV array into grid-compliant AC power
and feeds it into 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 powerPV 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 Introduction
5
Item
Description
Remarks
C
Sungrow single-phase
or three-phase 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 Inverter
Type Description
The type 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
Appearance
The image shown here is for reference only. The actual product you receive
may differ.
Type
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 Introduction User Manual
6
2
34561
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
type.
2
DC switch (optional)
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
Second PE 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.
Dimensions and Weight
WD
H
Fig. 2-3 Dimensions of the Inverter

User Manual 2 Product Introduction
7
Tab. 2-2 Dimensions and Weight
Type
W (mm)
H (mm)
D (mm)
Weight (kg)
SG2K-S / SG2K5-S /
SG3K-S
300 370 125 8.5
SG3K-D / SG5K-D
360
390
133
11.5
SG8K-D
360
390
148
15.5
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 colour and blinking frequency to get
the current state of the inverter. For detailed definition, see
Tab. 6-2.
2.3 Energy Meter (optional)
The SUNGROW Energy Meter is installed next to the main switch to detect the
electrical measured values at the grid-connected point. It communicates with
the inverter via an RS485 connection. The dimensions are shown below.

2 Product Introduction User Manual
8
Front view Side view
18 65
117
35
45.3
Fig. 2-5 single-phase Meter Dimensions (unit: mm)
Back view Side view
72
85
45 27
45
35
Fig. 2-6 Three-phase Meter Dimensions (unit: mm)
The single-phase Energy Meter and the three-phase Energy Meter
are alternative and delivered separately. The meter figures in this
document have been created for the single-phase Energy Meter
unless otherwise specified.
More detailed information on the Energy Meter can be found in the
respective Quick Installation Guide.
2.4 Function Description
2.4.1 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

User Manual 2 Product Introduction
9
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.
2.4.2 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.
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 Product Introduction User Manual
10
2.4.3 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.
2.4.4 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. 7-7 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.

11
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
Inverter Type
W (mm)
H (mm)
D (mm)
SG2K-S / SG2K5-S / SG3K-S
500
235
375
SG3K-D / SG5K-D
530
235
435
SG8K-D
530
250
435

3 Unpacking and Storage User Manual
12
3.2 Identifying the Inverter
The nameplate clearly identifies the product. It is attached to the side of the
inverter.
1
2
4
工作温度范围
型号
M o d e l
S / N
序列号
D C - In 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 LY 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
20（10/10）A
24（12/12）A
230 V
50 Hz
AC 21.7 A
4.99 kW
4.99 kVA
I
IP65
-25℃…60℃
光伏并网逆变器
G R ID -C O N N E C T E D I N V E R T E 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. 3-2 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
Regulatory compliance mark.
Do not dispose of the inverter together with household waste.
The inverter does not have a transformer.
Refer to the corresponding instructions.