Sungrow SG2K-S Owner's manual

SG2_3_4_5_6_8.3K-QUEN-Ver14 Version：1.4
Quick User Manual
SG2K-S / SG3K-S / SG3K-D /
SG4K-D / SG5K-D / SG6K-D /
SG8K3-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.
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.
Notice
In no case shall this manual substitute for the user manual or related notes on
the device.
Contents will be periodically updated or revised due to product development.
The information in this manual is subject to change without advance notice!
Make sure to read over, fully understand and strictly follow the detailed
instructions in the user manual and other regulations before installation. Any
violation could result in personal death, injury or damage to the device.
The latest manual can be acquired at www.sungrowpower.com.
Contact Information
Should you have any questions about this product, please contact us:
Company:
Sungrow Power Supply Co., Ltd.
Website:
www.sungrowpower.com
E-mail:
[e-mail], [e-mail]
Address:
No. 1699 Xiyou Rd., New & High Technology Industrial
Development Zone, Hefei, P. R. China.
Zip:
230088
Telephone:
[phone], [phone]
Fax:
[phone]

II
Contents
1Unpacking............................................................................1
2Installation............................................................................3
2.1 Location Requirements..............................................................3
2.2 Installing the Inverter..................................................................4
2.3 Installing the Energy Meter ........................................................6
3Electrical Connection .........................................................7
3.1 Terminal Description ..................................................................7
3.2 Grounding the Inverter...............................................................7
3.3 Grid Connection.........................................................................8
3.4 PV Connection...........................................................................9
3.5 RS485 Communication Connection.........................................11
3.6 (Optional) Meter Communication Connection..........................11
4Commissioning .................................................................13
4.1 Inspection before Commissioning............................................13
4.2 Button Instruction.....................................................................13
4.3 Commissioning Procedure.......................................................14
5LCD Operation...................................................................16
5.1 Main Screen.............................................................................16
5.2 Menu Structure ........................................................................17
5.3 Advanced Settings...................................................................18
5.4 Setting the Country..................................................................19
6Troubleshooting................................................................20
6.1 LED Indicator...........................................................................20
6.2 Errors on the App or LCD Screen ............................................20
7Exclusion of Liability........................................................27

1
1 Unpacking
1. Check the packaging
for any visible
damage
Fig. 1-1 Single Inverter Packaging
Inverter Type
W (mm)
H (mm)
D (mm)
SG2K-S / SG3K-S
500
235
375
SG3K-D / SG4K-D / SG5K-D / SG6K-D
530
235
435
SG8K3-D
530
250
435
2. Check the delivery contents for completeness according to the
packaging list.
Inverter Wall-mounting bracket
Communication connector
Documents
M4x80 screw set
a
PV connector set
b
AC connector set
Wi-Fi module
M4x10 grounding screw
c
b
Fig. 1-2 Standard Delivery Contents

1 Unpacking Quick User Manual
2
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 type.
Single-phase meter and
cables Three-phase meter and
cables
Fig. 1-3 Optional Accessory
The single-phase Energy Meter and the three-phase Energy Meter are
alternative. The meter figures in this document have been created for the
single-phase Energy Meter unless otherwise specified.
3. Identifying the inverter according to the nameplate attached on the side
of the inverter.
SUNGROW logo and product type
Technical data
Barcode, company name and origin
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 . , LT D .
中 国 制 造
M a d e i n C h in 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
220/240 V
60 Hz
AC 22.7 A
5 kW
5 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 P V 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
Marks of certification institutions
Fig. 1-4 Nameplate of Inverter
*The image shown here is for reference only. The actual product you receive
may differ.

3
2 Installation
2.1 Location Requirements
The inverter with IP65 can be installed indoors or outdoors.
Selecting an optimal location for the inverter is critical for its operating safety as
well as the expected efficiency and service life. Considerations for the location
include:
1. The structure should be capable of withstanding a force of four times the
weight of the inverter and be suitable for the dimensions of the inverter.
2. Install the inverter where it is convenient for installation, cable connection
and service.
3. Do not install the inverter in the living area or bedrooms. The noise
during its operation may affect daily life.
4. The location should be not accessible to children.
5. The ambient temperature and relative humidity should meet the following
requirements.
Max.
+60°C Min.
-25°C
Max. RH
+100%
6. Only mount the inverter on a non-flammable surface or a wooden
structure. Keep away from flammable materials or gas. Do not enclose
the inverter into a tight confinement.
Enclosed cabinet
Flammable wall Flammable material or
gas near the installation

2 Installation Quick User Manual
4
7. Prevent the inverter from direct exposure to sun, rain and snow.
8. Install at eye level for easy
inspection.
9. Install vertically for good heat
dissipation.
10. Never install the inverter horizontally, or with a forward tilt or with a
backward tilt or even with upside down. The horizontal installation can
result in damage to the inverter.
Forward tilt Backward tilt Horizontally Upside down
11. Refer to the following figure for the clearance requirements. For
multi-row installation, the distance between two adjacent rows should be
at least 400 mm.
400 mm 400 mm
400 mm
800 mm
2.2 Installing the Inverter
Inverter is installed on the wall by means of wall-mounting bracket and the
expansion plug sets.
The expansion plug set shown below is recommended for the installation. They
are not included in the delivery scope.

Quick User Manual 2 Installation
5
Self-tapping screw M6 Spring washerFender washerExpansion tube
1. Align the wall mounting bracket
horizontally on the wall with the
arrow upwards. Mark the
position of the drill holes. Use
at least one hole on the right-
and left-hand side of the wall
mounting bracket.
Tip: When mounting on a post,
use the upper and lower central
holes of the wall mounting
bracket.
2. Set the wall mounting bracket aside and drill the marked holes. The
depth of the holes should be about 70 mm. Install the wall-mounting
bracket.
Wall-mounting bracket
Fender washer
Spring washer
Self-tapping screw
Expansion tube
3. Mount the inverter to the bracket, and secure it with an M4x80 screw
(torque: 1.5 Nm).

2 Installation Quick User Manual
6
4. To protect the inverter from
theft, you can lock it with a
padlock. The padlock is
purchased by the user if
necessary. The hole diameter
is about 8 mm.
5. Remove the waterproof lid
from RS485 terminal and
install the communication
module to the inverter. Refer
to the manual delivered with
the module for details.
2.3 Installing the Energy Meter
The SUNGROW Energy Meter should be installed between the grid and the
load. It supports a 35 mm DIN-rail installation, as shown in the following figure.
Single-phase Energy Meter Three-phase Energy Meter
Fig. 2-1 Installing the Meter to the Rail

7
3 Electrical Connection
3.1 Terminal Description
All electrical terminals are located at the bottom of the inverter.
1 2 53 4
PV2
PV2
PV1
PV1
Fig. 3-1 Terminal Description
*Image shown here is for reference only. The actual product you receive may
differ.
Tab. 3-1 Terminal Descriptions
Item
Terminal
Description
1
PV terminals
MC4 terminals for PV inputs.
-S series: one pair of PV terminals.
-D series: three pairs for SG8K3-D and two pairs
for the other –D inverter types.
2
RS485 terminal
To connect a Wi-Fi module.
3
Meter | DRM
terminal
The left port is used to connect to the energy
meter. The right port is reserved.
4
Second PE terminal
For reliable grounding.
5
AC terminal
The AC terminal to the utility grid.
3.2 Grounding the Inverter
All non-current carrying exposed metal parts of the equipment and other
enclosures in the PV power system should be grounded, e.g. PV strings frame
and inverter enclosure.
A second Protective Earth (PE) terminal is equipped at the bottom of the
inverter. Be sure to connect this PE terminal for reliable grounding and ensure

3 Electrical Connection Quick User Manual
8
that the grounding resistance should be less than 10 Ohm.
Correct grounding connection of the second PE terminal and the AC
terminal is mandatory. Not properly connecting both PE will void any or
all product warranty.
Item
Description
A
Screw (M4×10 mm)
B
Spring washer
C
Washer
D
Cable socket
E
Grounding cable
The second PE conductor should be of the same cross-sectional area as the
original PE conductor in the AC connector. The cable and cable socket are not
included in the delivery scope.
3.3 Grid Connection
An independent two-pole AC circuit breaker for the inverter must be installed at
the output side for safe disconnection. The recommended specifications are as
follows:
Inverter Type
Specification
SG2K-S / SG3K-S / SG3K-D
25 A
SG4K-D / SG5K-D / SG6K-D
32 A
SG8K3-D
50 A
In PV systems with multiple inverters, protect each inverter with a
separate circuit breaker. This will prevent any residual voltage from
being present at the corresponding cable after disconnection.
AC Cable Requirements
The recommended specifications are shown in the following table

Quick User Manual 3 Electrical Connection
9
Type
Cross-section (mm²)
Cable diameter (mm)
Range
Recommended
Range
Recommended
SG2K-S / SG3K-S /
SG3K-D
4…6
4
10…14
14
SG4K-D / SG5K-D /
SG6K-D
4…6
6
10…14
14
SG8K3-D
-
6
-
15
Make sure to disconnect the AC circuit breaker and secure it against
reconnection before cable connection.
PE
L
N
8 mm –15 mm
40 mm
1 2
4
3
5
(0.8 N m)
“Click”
“Click”
Cable gland
Housing
Terminal block
.
3.4 PV Connection
There is a risk of inverter damage! The following requirements should
be met. Failure to do so will void guarantee and warranty claims.
Make sure that the maximum short circuit current of each DC input is
less than inverter allowable limit.
Make sure that the maximum open voltage of each string is less than
600 V. Voltage over 600 V can damage the inverter.
Make sure that the impedances between the positive terminal of the
PV string and Earth, and the impedances between the negative
terminal of the PV string and Earth are larger than 200 kΩin any
case.
All PV cables are equipped with the water-proof direct plug-in connectors which
match the PV terminals at the bottom of the inverter.

3 Electrical Connection Quick User Manual
10
The requirements of PV cables are as follows.
Cross-section
Cable Diameter
Max. Withstand
Voltage
Max. Withstand
Current
4 mm2–6 mm2
6 mm–9 mm
600 V
Equal to or greater
than short-circuit
current
Strip the insulation from the cables by 7 mm–8 mm.
Tighten the cable gland with torque of 2.5 Nm–3.0 Nm.
Positive crimp contact
Negative crimp contact
Crimp contact
Positive insulator
Cable gland Negative insulator
Crimp contact
Cable gland
1
PV2
PV2
PV1
PV1
480.0
+
-
3
2
ON
OFF
4
+
-
PV
+
-
-
+
PV
+
PV
-
PV
* (-D series) Seal the unused PV terminals with the terminal caps.
The inverter will not function properly if any PV polarity is reversed.
If the PV connectors are not assembled into place, it may cause an arc
or overheat. The loss caused by this issue will void the warranty.

Quick User Manual 3 Electrical Connection
11
3.5 RS485 Communication Connection
For the Wi-Fi installation, see the last step in section “2.2 Installing the
Inverter”. More detailed information for the Wi-Fi module can be found in the
respective manual.
The RS485 terminal can also be used to connect an external RS485
device. For the pin definition and waterproof procedure, please contact
SUNGROW.
Failure to comply with the requirements of wiring or waterproof will
void the warranty.
3.6 (Optional) Meter Communication Connection
The SUNGROW energy meter should be installed next to the main switch. The
section mainly describes the connection on the inverter side. For details on the
meter side, see the guide delivered with the meter.
Sungrow meter
Home Appliance
PV strings
A
Meter
link
Network
meter
Main
switch
Utility
grid
Solar switch
Inverter
1. Take out the communication connector from inverter’s packaging and the
RS485 cable from the meter’s packaging.
L
N
B
A
Power supply cable (only
for single-phase meter) Meter RS485 cable
Communication connector
2. Unscrew the swivel nut from the cable gland and remove the waterproof
plug from the left inlet. Lead the Aand Bplugs from inside out through
the connector. This will result in the cable with the RJ45 plug on the
inside end, and the Aand Bplugs on the outside.

3 Electrical Connection Quick User Manual
12
3. Loosen the screws and
remove the waterproof lid
from the RS485|DRM
terminal.
Note:
Retain the screws for later
installation.
4. Insert the RJ45 plug into the
left (Meter) port until it
makes a clicking sound.
5. Secure the waterproof lid to
the inverter bottom with the
four screws, then fasten the
cable gland.

13
4 Commissioning
Commissioning is essential for the system, which can protect it against fires,
injury and electric shock.
4.1 Inspection before Commissioning
Check the following items before starting the inverter:
1. All the installation sites are convenient for operation, maintenance and
service.
2. Check and confirm that the inverter is firmly installed.
3. Space for ventilation is sufficient for one inverter or multiple inverters.
4. Nothing is left on the top of the inverter or battery pack.
5. The inverter and accessories are correctly connected.
6. Cables are routed in a safe place or protected against mechanical
damage.
7. The selection of the AC circuit breaker is optimal.
8. The terminals that are not used underneath the inverter are sealed.
9. Warning signs and labels are suitably affixed and durable.
4.2 Button Instruction
The LCD display panel with a screen, an indicator and two buttons is on the
front of the inverter. Please refer to the following table before any operation of
the inverter.
Indicator
Screen Button Button

4 Commissioning Quick User Manual
14
Tab. 4-1 Button function
Button
Operation
Description
ESC
≤1.2 s
Navigate up / down or change the setting values.
Hereinafter referred to as “Touch ESC”.
＞1.2 s
Return to a previous menu or cancel the settings.
Hereinafter referred to as “Press ESC”.
ENT
≤1.2 s
Move left or right, or turn pages, or view the active
error/warning from the main screen.
Hereinafter referred to as “Touch ENT”.
＞1.2 s
Enter the sub-menu or confirm a selection or settings.
Hereinafter referred to as “Press ENT”.
Risk of burns due to hot components!
Do not touch any hot parts (such as heat sink) during operation. Only
the LCD panel and the DC switch can safely be touched at any time.
4.3 Commissioning Procedure
Make sure all the above mentioned items meet the requirements.
1. Connect the external AC circuit breaker.
2. Rotate the DC switch to “ON”.
3. If there is sufficient sunlight, the inverter will enter the running state and
start to feed AC power to the grid. The LCD screen will be activated 5s
later.
Pac:
Status:
3456W
Running
Startup 80% 3456W
Standby
Pac:
Status:
4. Observe the status of the indicator.
Tab. 4-2 Indicator Status Description
Status
Description
Green
Steady on.
The inverter is running normally, or with a
warning, or with power limitation.
Inverter status: Running.
Flash once every 1s.
The inverter is in the status of standby,
startup or Turn off (via LCD menu).
Red
Steady on.
Inverter faults.
Flash quickly every
0.2s.
Grid faults.

Quick User Manual 4 Commissioning
15
Status
Description
Flash slowly every 1s.
PV faults.
More detailed information on the indicator of the communication module can be
found in the respective Quick Guide.
5. Visit www.isolarcloud.com.hk or iSolarCloud App to view inverter
information.

16
5 LCD Operation
5.1 Main Screen
After successful commissioning, the LCD screen will enter the main screen.
Pac:
Status:
3456W
Running
Inverter power
Inverter status
If there is no button operation for:
1 minute, LCD backlight will be automatically deactivated;
2 minutes, system will return to the default screen (main screen).
When there is no button operation for 8 seconds on the main screen, the LCD
screen will automatically go through the main screen and energy, PV and grid
interfaces, with each interface stayed for 2 seconds. Quit this mode by any
operation on any button.
E-total: 1999kWh
E-today: 20.0kWh
Ipv: 2.9A
Grid Vtg:
Grid Frq: 221.7V
50.0Hz Vpv: 250.0V
Pac:
Status:
3456W
Running
* The images shown here are for your reference only. For -D series, all PV input
information will be displayed.
Tab. 5-1 Status Description
State
Description
Standby
The inverter waits for sufficient sunlight, then the DC voltage
recovers.
Startup
The inverter is initializing and synchronizing with the grid.
Running
After being energized, the inverter tracks the PV strings’
maximum power point (MPP) and feeds the AC power to grid.
This mode is the normal mode.
Turn off
The inverter will stop running by manual “OFF” via the LCD
menu. Set to “ON” if you want to restart the inverter.
Upgrading
The DSP or LCD program is upgrading.