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SG2_3_4_5_6_8.3K-UEN-Ver14 Version：1.4
User Manual
SG2K-S / SG3K-S / SG3K-D /
SG4K-D / SG5K-D / SG6K-D /
SG8K3-D
PV Grid-Connected Inverter
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I
About This Manual
The manual mainl y describes the product information, guidelines for i nstallation,
operation and mai ntenance. The manual c annot include complete i nformation
about the phot ovoltaic (PV) syst em. 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 t he following inverter types:
SG2K-S
SG3K-S
SG3K-D
SG4K-D
SG5K-D
SG6K-D
SG8K3-D
They will be ref erred to as “inverter” hereinafter unl ess otherwise specified.
Target Group
This manual is intended for:
qualified pers onnel who are responsible for the installation and
commissioning of the inverter; and
inverter owners who will have the ability to interac t with the inverter.
How to Use This Manual
Read the ma nual and ot her relat ed docume nts bef ore any wor k on the inverter
is carried out. Documents must be stored carefully and be available at all times.
All rights to the c ontent of this manual are owned by Sungrow Power Supply
Co., Ltd. ( herei naft er “SUNGROW”). No part of this doc ument can be modified,
distributed, reproduc ed or publis hed in any form or by any means w ithout prior
written per m ission from SUNGROW.
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II
Contents may be periodic ally updated or r evised due to product development.
The informati on in this manual is subject to change without noti ce. The latest
manual can be ac quired at www.sungrowpower.com.
Symbols
Safety inst ructions will be hi ghlighted with the fol lowing 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.
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III
Contents
About This Manu al ..................................................................... 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
2.3 Energy Meter (Optional) ............................................................ 8
2.4 Function Description .................................................................. 9
2.4.1 Basic Function ........................................................................... 9
2.4.2 Reactive Power Regulatio n ..................................................... 10
2.4.3 Regular Operational Voltage Range ........................................ 11
2.4.4 Regular Operational Frequency Range ................................... 12
3 Unpacking and Storage ....................................................15
3.1 Unpacking and Inspection ....................................................... 15
3.2 Identifying the Inverter ............................................................. 16
3.3 Delivery Contents .................................................................... 17
3.4 Storage of Inverter ................................................................... 18
4 Mechanic al Mou nti ng ........................................................19
4.1 Safety during Mounting ........................................................... 19
4.2 Location Requirements ........................................................... 19
4.3 Tools ........................................................................................ 21
4.4 Installing the Inverter ............................................................... 23
4.5 Installing the Energy Meter ...................................................... 25
5 Electrical Conne ct i on .......................................................26
5.1 Terminal Description ................................................................ 27
5.2 Grounding the Inverter ............................................................ 28
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IV
5.3 Grid Connection ....................................................................... 29
5.3.1 AC Side Requirement s ............................................................ 29
5.3.2 Assembling the AC Connector ................................................. 30
5.3.3 Installing the AC Connector ..................................................... 31
5.4 PV Connection ......................................................................... 32
5.4.1 PV Input Configuration ............................................................ 32
5.4.2 Assembling the PV Con nector ................................................. 35
5.4.3 Installing the PV Connector ..................................................... 36
5.5 RS485 Communication Connection ......................................... 37
5.6 (Optional) Meter Communication Connection .......................... 38
5.6.1 On the Meter Side ................................................................... 38
5.6.2 On the Inverter Side ................................................................ 40
6 Commissioning ................................................................. 42
6.1 Inspection before Commi ss ion ing ............................................ 42
6.2 Button Function ........................................................................ 42
6.3 Commissioning Procedure ....................................................... 43
7 LCD Operation ................................................................... 44
7.1 Button Function ........................................................................ 44
7.2 Main Screen ............................................................................. 44
7.3 Menu Structure ........................................................................ 46
7.4 Viewing Running Info ............................................................... 47
7.5 Advanced Settings ................................................................... 47
7.5.1 Inputt ing the Password ............................................................ 47
7.5.2 Setti ng P rotective Parameters ................................................. 48
7.5.3 Zero-e xport Setting ................................................................. 50
7.5.4 Adding the Existing Inverter ..................................................... 51
7.5.5 PF Setting ............................................................................... 51
7.5.6 Parameter Reset ..................................................................... 51
7.5.7 Energy Adjustment .................................................................. 51
7.5.8 Setti ng C om munication Parameter .......................................... 52
7.5.9 Ethernet Configuration ............................................................ 52
7.6 Starting/Stopping the Inverter .................................................. 52
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V
7.7 Viewing the Error Record ........................................................ 53
7.8 Setting the T ime ...................................................................... 53
7.9 Setting the Country .................................................................. 53
7.10 Viewing Device Info ................................................................. 54
8 T r oubl es ho otin g and Ma int ena nc e ..................................55
8.1 Troubleshooting ....................................................................... 55
8.1.1 LED Indicator .......................................................................... 55
8.1.2 Errors on the App or LCD Screen ............................................ 55
8.2 Routine Maintenance .............................................................. 61
9 System Decommi ssi oning ...............................................63
9.1 Disconnecting the Inverter ....................................................... 63
9.2 Dismantling the Inverter .......................................................... 64
9.3 Disposing of the Inverter ......................................................... 64
10 Appendix ............................................................................65
10.1 Technical Data ......................................................................... 65
10.1.1 –S Seri es ............................................................................... 65
10.1.2 –D Series .............................................................................. 66
10.2 Quality Assurance ................................................................... 71
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1
1 Safety
The inverter has been designed and tested strictly according to international
safety regul ations. Read all safety i nstructions careful ly prior to any work and
observe them at all times when work ing on or with the invert er.
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 w ork-related saf ety warnings and notes will be specif ied at critical
points in this manual.
1.1 General Safety
PV Panels
Please foll ow the safety instr uctions related to the PV strings.
Lethal voltage!
PV strings will produce elect rical power when exposed t o 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 foll ow the regulations rel ated 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.
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1 Safety User Manual
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1.2 Inverter
There is a warning label on the invert er 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 w ill 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 electr ic 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 si tuations that can
result i n death or serious injuries due to electric shock.
All the warning labels and nameplate on the inverter body:
must be clearly visible; and
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User Manual 1 Safety
3
must not be rem oved, covered or pas ted.
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 comp onents!
DO not touch any hot parts (such as h eat sink) dur ing operati on. Only
the LCD panel and the DC switch can safely be touched at any time.
Only qualified personnel can perform the country setting.
Unauthorized alter ation of the country setting may cause a breach of
the type-certificate marking.
Risk of inverter damage due to electrostatic discharg e (ESD).
By touching the electroni c components, you ma y damage the inverter.
For inverter handling, be sure to:
avoid any unnecessary touching; and
wear a grounding wristband before touching an y connectors.
1.3 Skills of Qualified Personnel
Qualified per sonnel must have the f ollowing skills:
training in the installation and commissioning of the electrical system, as well
as the dealing with hazards;
knowledge of the manual and other rel ated documents; and
knowledge of the local regulations and directives.
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2 Product Introduction
2.1 Intended Use
The single-phase string inverters without transformer are the crucial units
between the PV s trings 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 cl ass
II in accordanc e wit h IEC 61730, applicati on clas s 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 prod uct due to a faulty or d amag ed DC i nst al lat i on ar e
not covered by warranty.
The intended use example is shown in Fi g. 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, SG3K-S, SG3K-D, SG4K-D,
SG5K-D, SG6K-D and SG8K3-D.
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User Manual 2 Product Introduction
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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
220 Vac / 230 Vac / 240 Vac
(single phase)
SG3K-S 3000 W
SG3K-D 3000 W
SG4K-D 4000 W
SG5K-D 5000 W
SG6K-D 6000 W
SG8K3-D 8300 W
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2
3
4
5
61
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
To disconnect the DC current safely.
3
RS485
terminal
Can be connected to Wi-Fi communication module.
4
Meter | DRM
terminal
Left connector is intended for energy meter, right
connector is reserved.
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.
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User Manual 2 Product Introduction
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Dimensions and Weight
W
D
H
Fig. 2-3 Dimensions of the Inverter
Tab. 2-2 Dimensions and Weight
Type
W (mm)
H (mm)
D (mm)
Weight (kg)
SG2K-S / SG3K-S
300
370
125
8.5
SG3K-D / SG4K-D /
SG5K-D / SG6K-D
360 390 133 11.5
SG8K3-D
360
390
148
15.5
LCD Panel
The LCD panel wit h a screen, an indicator and two buttons is on the front of the
inverter.
3
1 2 2
Fig. 2-4 LCD Display 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.
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No.
Name
Description
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.
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)
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User Manual 2 Product Introduction
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The singl e-phase Energy Meter and the three-phas e En er gy Met er
are optional
and delivered separately. The meter figures in this
document have been created for the single-phase Energy Meter
unless otherwise specified.
More detai led i nfor mat i on on t he Ener gy Meter c an be fo und in the
respective Quick Installation Guide.
2.4 Function Description
2.4.1 Basic Function
Conversion function
Inverter c onverts the DC power int o the AC power, which conforms to the
grid requir em ent of its installation country.
Data storage
Inverter archives essent ial data including running information and error
records.
Parameter configuration
Inverter provides various parameter configurations for optimal operation. You
can set the country via the App or the cloud server, if you need a more
professional setting, please contact Sungrow.
Communicati on interface
You can choose the RS485 terminal for connecting a communication module
to the PV system, such as a Wi-Fi module. Refer to the quick guide for the
Wi-Fi module for details.
It is recommended to use the communication module from
Sungrow. U
sing a device from other companies may lead to
communicat ion failure or other unexpected damage.
Further information on the communication module can be found in
the respective Quick Installation G uide.
Earth fault alarm
If an earth fault occurs, the error code will be displayed on the LCD screen.
The buzzer inside the inverter wi ll beep to signal an exter nal alarm.
Protective function
The protecti ve functions are integrated in the inverter, incl uding short circuit
protection, grounding insulation r esistance surveillance, residual current
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2 Product Introduction User Manual
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protection, anti-islanding protection, DC overvoltage / over-current protection,
etc.
2.4.2 Reactive Power Regulation
The inverters are capable of operating in the followi ng power fact or range. Any
operational point, as a resul t of the foll owing definitions /c urves, will be r eached
at maximum in 10 s econds.
PF Mode
The power factor is equal to 1, adjusted in factor y, with tolerance t o work from
0.98 leading (inductive) to 0.98 laggi ng (capacitive).
The power factor can be set via the LCD menu. For details, see “7.5.5 PF
Setting”.
Q(p) Mode
The Q(p) mode i s not ap plicabl e to SG2K-S. This mode is disabl ed by defaul t.
You can enable this function via the cloud server www.isolarcloud.com.hk. Then,
after any change in active power, the inverter is able to adjust the reactive
power automatically according to the following power factor curve.
PF
20%
75%
50%
Lagging
1.0
Leading
0.90
0.90
100%
A
B
C
P/P
norminal
Fig. 2-7 Power Factor Curve
The power factor curve can only be enabled when the grid voltage surpass
the activation voltage, adjus table value between 100 % and 110 % of
nominal voltage level, with pre-defined value at fac tory of 104 % of nominal
voltage.
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User Manual 2 Product Introduction
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The power factor curve can only be disabled when the voltage goes back to
a value below the shutdown voltage level, adjustable value between 90 %
and 100 % of nominal voltage level, w ith default voltage level at 100 %
adjusted at factory.
2.4.3 Regular Operational Voltage Range
For Country Brazil (Code “BRA”)
The inverters can operate within the voltage limits defined in the follow ing table.
Tab. 2-3 Disc onnect i on related to Voltage
Voltage Level at Grid-connected
Point (% related to Local Nominal
Voltage)
Maximum Time to Disconnect
(1)
V < 80 %
0.4 s
80 % <= V <= 110 %
Normal operation
(2)
V > 110 %
0.2 s
When the volt age level is out of the operational levels shown in the table, the
inverter wi ll disconnect from the grid.
If a disturbance lasts less than the required disconnection time, the inverter can
reconnect t o the grid if the voltage level goes bac k to normal levels after the
disturbance.
Remarks:
(1) The maximum time to disconnect refers to the interval between the
abnormal vol tage level and the action of inverter (disconnect from the grid).
(2) When the grid volt age is hi gher than (110 % V
nominal
- 5) V, the inverter will
reduce the active power export to grid according to t he following equation:
△
P = P
nominal
x R
Where:
− △P is t he variat ion of ac tive p ower expor t to gr id (i n %) r elated t o the nom inal
power.
− P
nominal
is the nominal gr id power.
− R is the desired reducti on in active export power (expressed in % of Volt),
adjusted in -20 % per Volt.
For Country Mexico (Code “MX”)
The inverters can operate within the voltage limits defined in the follow ing table.
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Tab. 2-4 Disc onnect i on related to Voltage
Voltage Level at Grid-connected
Point (% related to Local Nominal
Voltage)
Maximum Time to Disconnect
(1)
V < 95 %
0.16 s
(2)
95 % <= V <= 105 %
Normal operation
V > 105 %
0.16 s
(2)
When the volt age level is out of the operational levels shown in the table, the
inverter wi ll disconnect from the grid.
If a disturbance lasts less than the required disconnection time, the inverter can
reconnect t o the grid if the voltage level goes bac k to normal levels after the
disturbance.
Remarks:
(1) The maximum time to disconnect refers to the interval between the
abnormal voltage level and the action of inverter (disconnect from the grid).
(2) After the low / high voltage, the inverter will only reconnect to the grid again
when the grid voltage returns to normal operation range, respecting the
reconnection waiting time of 300 seconds.
2.4.4 Regular Operational Frequency Range
For Country Brazil (Code “BRA”)
Nominal frequency of Brazilian grid is 60 Hz.
The inverters can operate within the frequency limits defined in the following
table.
Tab. 2-5 Disconnection related to Frequency
Grid Frequenc y Level Maximum Tim e to Disconnect
(1)
f < 57.5 Hz
0.2 s
57.5 Hz <= f <= 62 Hz
Normal operation
(2)
f > 62 Hz
0.2 s
(3)
When the fr equency level is out of the operat ional levels shown in the table, the
inverter wi ll disconnect from the grid.
Remarks:
(1) The maximum time to disconnect refers to the interval between the
abnormal frequency level and the action of inverter (disconnect from the
grid).
(2) After the low fr equency, the inver ter will only reconnect to the grid again
when the frequency returns t o 59.9 Hz, respect ing the reconnection waiting
time of 300 seconds. When the grid frequency is more than 60.5 Hz and les s
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User Manual 2 Product Introduction
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than 62 Hz, the inver ter wi ll reduc e the active power export to grid according
to the following equation:
△
P = [f
grid
x (f
nominal
+0.5)] x R
Where:
−
△
P is the variat ion of active power export to grid (in % ) related to the active
power export to gird at the moment f requency surpass 60. 5 H z.
− f
grid
is the grid frequency.
− f
nominal
is the nominal gr id frequency.
− R is the desired reduction in active export power (expressed in % of Hz),
adjusted in -40 % per Hz.
− P
max
, at the time of exceeding the mains frequency of 60.5 Hz, value is
frozen.
Please see the following figure for the curve of PV system responding to
frequency changes.
60.1
61.5
62.0
60.5
61
P/Pmax [%]
F [Hz]
P1 P2
P3
P4
P5
40
100
57.5
Fig. 2-8 Power Reduction Curve for Over-frequency
− If the grid frequenc y suddenly reduces after this r eduction power pr ocedure
begins, the inverter will remain with the minim um export power (P
max
- △P
max
)
during the frequency increase process. The inverter will only increase the
export active power if the grid frequency returns to 60 H z +/- (0.05 Hz) for at
least 300 seconds.
− When retur ning back to nor mal, the export power will increas e at most 20 %
per minute (20 % of Nominal Power ( P
max
)) until it s normal back again w ith
full power.
(3) After the high f requenc y, the invert er will only reconnect to the gri d again
when the grid frequency returns to 60.1 Hz, respecting the reconnection
waiting time of 300 seconds. The export power will grow i n a rate up to 20 %
per minute of P
max
per minute.
For Country Mexico (Code “MX”)
Nominal frequency of Mexican gri d is 60 Hz.
The inverters can operate within the frequency limits defined in the following
table.
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2 Product Introduction User Manual
14
Tab. 2-6 Disc onnect i on related to Frequency
Grid Frequency Level Maximum Tim e to Disconnect
(1)
f < 59.3 Hz
0.16 s
(2)
59.3 Hz <= f <= 60.5 Hz
Normal operation
f > 60.5 Hz
0.16 s
(2)
When the fr equency level is out of the operat ional levels shown in the table, the
inverter wi ll disconnect from the grid.
Remarks:
(1) The maximum time to disconnect refers to the interval between the
abnormal frequency level and the action of invert er (disconnect from the
grid).
(2) After the low / hi gh frequency, the inverter wi ll only reconnect t o the grid
again when the grid frequency returns to normal operation range,
respecting the reconnection waiting time of 300 seconds.
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15
3 Unpacking and Storage
3.1 Unpacking and Inspection
The inverter is thoroughly tested and strictly inspected before delivery. Damage
may still occ ur during shipping. Cond uct a thorough inspect ion 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.
4. Contact SUNGROW or the distributor in case of any damaged or missing
components.
It is the best choic e to store the inverter in the origi nal packaging. So, do not
dispose of i t.
Fig. 3-1 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
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3 Unpacking and Storage User Manual
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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 od e l
S/ N
序列号
D C -I np ut
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 ww. s un g ro w po w er. co m
S U N GR O W P O W E R S U P PL Y CO . ,L T D.
中 国 制 造
M ad 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
II I[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 ID - C O N NE C T E D P V 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
Fig. 3-2 Nameplate of Inverter
* The image shown her e is for reference only. T he actual produ ct 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 Descri ption 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.
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User Manual 3 Unpacking and Storage
17
Icon
Description
TÜV mark of conformity.
CE mark of conformity.
INMETRO mark.
3.3 Delivery Contents
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. 3-3 Delivery Contents
a) The inverter figures in t his document ha ve been create d for SG5K-D unl ess
otherwise specified.
b) The documents include the Quick User Manual, quality certificates,
packaging li st and product test reports.
c) One or two or three pairs, depending on inverter type.
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18
Optional Accessory
Single-phase meter and
cables
Three-phase meter and
cables
The single-phase Energy Meter and the three-phase Energy Meter are optional.
The meter figures in this document have been created for the single-phase
Energy Meter unless otherwis e specified.
3.4 Storage of Inverter
If you do not install t he inverter immediately, choose an appro priate l ocation t o
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 r elative humidity should be always between 0 and 100 %,
non-condensing.
When storing inverters, do not stack more than 8 inverter packages on top of
each other.
The packaging should be upright.
If the inverter has been stored mor e than half a year, the qualified pers onnel
should thoroughly check and test it before using.
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19
4 Mechanical Mounting
4.1 Safety during Mounting
Make sure ther e is no electrical conne ction before instal lation.
In order to avoid electric shock or other
injury, be sure there is no
electricity or plumbing installati ons before drilling holes.
Risk of injury due to im proper handling
The weight may cause injuries, serious wounds, or bruise.
Always follow the instructions when
moving and positioning the
inverter.
System perfor mance loss due to bad ventilation!
The inverter requires good ventilation during operation. Keep it
upright and with not hing covering the heat sinks.
Wear gloves to avoid scratches when mount ing the inverter.
4.2 Location Requirements
The inverter with IP65 can be installed indoors or outdoors.
Selecting an opt imal location for the inverter is critical for its operating safety as
well as the e xpected effi ciency and s ervice l ife. Considerations f or the loc ation
include:
1. The structure should be capable of withstandi ng 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.
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4 Mechanical Mou nt in g User Manual
20
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
structur e. Keep away from flamm able materials or gas. Do not enclose
the inverter into a tight confi nem ent.
Enclosed cabinet
Flammable wall
Flammable material or
gas near the installation
7. The shaded side of the building woul d be better to preve nt the inverter
from exposure to the 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 ti lt or even with upside down. Th e horizontal installat ion can
result i n dam age to the inverter.
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User Manual 4 Mechanical Mou nt in g
21
Forward tilt Backward tilt
Horizontally
Upside down
11. Clearance requir ement and multiple installation:
400 mm
400 mm
400
mm
800 mm
For multi-r ow i nstal l ati on, t he di stanc e betw een t wo ad j acent r ows shoul d be at
least 400 mm.
4.3 Tools
General tools (recommended)
Packaging tape
Marker
Measuring tape
Level
Utility knife
Multimeter
Measurement range: ≥
1100Vdc
880.
0
Protective clothing
Wrist strap
Protective gloves
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4 Mechanical Mou nt in g User Manual
22
Dust mask
Earplugs
Goggles
Insulated shoes
Vacuum cleaner
Heat shrink tubing
Installation tools (recommended)
Heat gun
Hammer drill
Drill bit: φ10
Rubber mallet
Electric screwdriver
Phillips screwd r iv er
Wire stripper
Hydraulic plier
Wire crimper
Crimping range:
2.5-6mm²
Wrench for MC4 terminal
Wire clipper
RJ45 crimping tool
Flat-blade screwdriver
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User Manual 4 Mechanical Mou nt in g
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Torx screwdriver
TX30
Socket wrench
Open end: 10mm ( f o r M6
bolts)
13mm (for M8 bolts)
16mm (for M10 bolts)
4.4 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 instal lation. They
are not incl uded in the delivery scope.
Stainless steel screw M6 Spring washerFender washerExpansion tube
1. Align the wall mo unti ng brac k et
horizontally o n t he wall with the
arrow upwards. M
ark the
position of the drill holes. Use
at least one hole on the rightand 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.
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4 Mechanical Mou nt in g User Manual
24
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 Nm).
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. The following figure takes the
Wi-Fi module as an example. Refer to the manual delivered with the
module for detai ls.
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25
4.5 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 show n in the following figure.
Single-phase Energy Meter
Three-phase Energy Meter
Fig. 4-1 Installing the Meter to the Rail
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26
5 El ectrical Connection
Prior to any electrical connections, keep in mind that the inverter has dual
power supplies. It is mandatory for the technical personnel to wear personal
protecti ve equipments (PPE) during the electric al work.
Danger to life due to a high voltage inside the inverter
Make sure that the cables are not live before electrical connection.
Do not turn on the AC circuit breaker until all the electrical
connections ar e completed.
Improper operation dur ing the wir ing process ca n cause fa tal inj ury to
the operators o r unrecoverable dam age to the inverter.
Only qualified personnel can perform the wiring work.
All cables must b e fi r mly att a ched, un dama ged, p roper l y in sul at ed an d
adequately dim ensioned.
Comply with t he safety instructions relat ed to the PV strings and the
regulations relat ed 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.
Electrical connections of the inverter include grounding, PV connection, AC
connection and communication connection.
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A
B
C
D
L
N
PE
PE
Fig. 5-1 Electrical Connection Diagram
Item
Name
Remarks
A PV strings
-S series: one pair of PV terminals.
-D series: three pairs for SG8K3-D and two pairs
for other –D inverters.
B
Wi-Fi module
RS485 communication.
C
AC circuit
breaker
Used as a protective device during electrical
connection. User equips this device according to
the maximum output voltage and current.
The PE wire of the AC terminal must be directly
connected to the grounding bar. Do not connect it to
protection devices such as the circuit breaker.
D
Utility grid
220 Vac / 230Vac / 240 Vac.
5.1 Terminal Description
All elect rical terminals are located at the bottom of the inverter.
1 2
53 4
PV2
PV2
PV1
PV1
Fig. 5-2 Terminal Description
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5 Electrical Connection User Manual
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* Image shown here is for reference only. The actual product you receive may
differ.
Tab. 5-1 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
Can be connected to Wi-Fi communication
module.
3
Meter | DRM
terminal
Left connector is intended for energy meter, right
connector is reserved.
4
Second PE terminal
For reliable grounding.
5
AC terminal
For connection to the utility grid.
5.2 Grounding the Inverter
All non-current carrying exposed metal parts of the equipment and other
enclosures in the PV power s ystem s hould b e ground ed, e.g. P V str ings frame
and inverter enclosure.
A second Protective Earth (PE) terminal is equipped at the bottom of the
inverter. Be sure to connect this PE ter minal for reliabl e grounding and ensure
that the groun ding resistance is 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
Fig. 5-3 Second PE Connection
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User Manual 5 Electrical Connection
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* The second PE conductor should be of the same cross-sectional area as the
original PE c onductor in the A C connec tor. The cable and cable soc ket are not
included in the delivery scope.
5.3 Grid Connection
The inverter is connected to t he grid via 3 wires ( L , N and PE).
Inverter is equipped with the waterpr oof direct plug-in connector which matc hes
the AC terminal at the bottom of the inverter.
5.3.1 AC Side Requirements
AC Circuit Breaker
An independent t wo-pole AC circui t br eak er for the inverter must be ins t all ed at
the output s ide f or saf e disconnection. The recommended spec if ic at ions ar e 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 di sconnection.
Residual Current Device
With an integrated universal current-sensitive residual current monit oring unit
inside, the i nverter will disconnect immediately f rom the mains power as s oon
as a fault c urrent with a value exceeding the limit has been detected.
However if an e xternal res idual c urrent device ( RCD) is mandator y, the switc h
must be triggered at a residual current of 300 mA or higher.
AC Cable Requirements
The recommended specifications are shown in the f ollowing table
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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
5.3.2 Assembling the AC Connector
1. Lead the AC cable t hrough the
cable gland and the housing.
2. Remove the cabl e jacket by
40 mm, and strip the wire
insulation by 8-15 mm.
8-15 mm
PE
L
N
40 mm
3. Fully insert the conductors to
the corresponding terminal
and tighten the screws with
the torque 0.8 Nm
. Pull
cables outward to check
whether they are firmly
installed.
Observe the terminal layout of AC connector. Do not connect the
phase lines to “PE” terminal, otherwise the inverter will not function
properly and the loss of any or all the warranty rights may follow.
4. Assemble the housing, the terminal block and cable gland. Make sure
that the rib of the terminal block and the groove on the housing
engage perfectly until a “Click” is heard or felt.
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5.3.3 Installing the AC Connector
1. Disconnect the AC circuit breaker and secure it against reconnection.
2. Measure the voltage and frequency of the grid-connected point to ensure
that they are wi thin the specifi ed range listed in “10.1 Tech nical Data”.
3. Align the AC connector and the AC
terminal and mate them together by
hand
. Tighten the connector to the
terminal until a “Click” is heard or felt.
4. Connect the other ends. Connect “PE” conductor to the grounding
electrode. Connect “L” and “N ” conductors to the AC circuit breaker.
5. Pull all the lines outward to check whether they are firmly installed.
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32
5.4 PV Connection
There is a ri sk of inverter damage! The foll owing requir ements shoul d
be met. Fail ure 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 t hat t he maxi mum open vol t age of each st r ing is l ess th an
600 V. Voltage over 600 V can dam age the inverter.
Make sure that the impedances between the po sitive terminal of the
PV string and Earth, and the impedances between the negative
terminal of the PV string and Earth are larger than 200 kΩ in any
case.
5.4.1 PV Input Configuration
-S Series
There is one input area with one MPP tracker. Only one input can be connected,
as shown in the following figure.
PV input
MPPT
Inverter inside
Type
Total PV Input
Power Limit
Open-circuit
Voltage Limit
Short-circuit
Current Limit
SG2K-S
3000 W
600 V
12 A
SG3K-S
4000 W
600 V
12 A
-D Series
For –D inverters except SG8K3-D, there are two pairs of PV terminals, each
with its MPP tracker.
The inverter SG8K3-D has three pairs of PV terminals. The PV1 has an
independent MPP tracker. The PV2 has two pairs of PV ter minals, which are
internal paral leled and with one MPP tracker.
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User Manual 5 Electrical Connection
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The PV1 and PV2 c an be configured in independent mode or parallel mode.
For SG8K3-D, the PV strings to PV2 input should have the same PV
module type, the same string length, identical tilt and identical
orientation.
Independent Mode
The PV inputs work independ en t ly, each with its own MPPT. The two PV inputs
can be different fr om each other in P V module types, number s of PV panel s in
PV string, tilt angles and orientation angle of PV modules.
MPPT2
MPPT1
Inverter Inside
PV input 1
PV input 2
Fig. 5-4 Independent Mode for –D inverters except SG8K3-D
MPPT
2MPPT1
Inverter Inside
PV input 1
PV input 2
Fig. 5-5 Independent Mode for SG8K3-D
Prior to connec ting the invert er to PV inputs, the s pecifications in the following
table should be met:
Type
Total PV Input
Power Limit
Open-circuit
Voltage Limit
Short-circuit
Current Limit
SG3K-D
4000 W
600 V / 600 V
12 A / 12 A
SG4K-D
5200 W
600 V / 600 V
12 A / 12 A
SG5K-D
6500 W
600 V / 600 V
12 A / 12 A
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5 Electrical Connection User Manual
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Type
Total PV Input
Power Limit
Open-circuit
Voltage Limit
Short-circuit
Current Limit
SG6K-D
7800 W
600 V / 600 V
12 A / 12 A
SG8K3-D
10800 W
600 V / 600 V / 600 V
15 A / 15 A / 15 A
Only the current is limited for a single input and the power is not
limited.
Parallel Mode
All PV str ings should have t he same PV module t ype, the sam e string l ength,
identical tilt and identical orientation for optimum results.
PV input 1
PV input
2
MPPT
Inverter inside
Fig. 5-6 Parallel Mode for –D inverters except SG8K3-D
PV input 1
PV input 2
MPPT
Inverter inside
Fig. 5-7 Parallel Mode for SG8K3-D
Prior to connec ting the invert er to PV inputs, the s pecifications in the following
table should be met:
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User Manual 5 Electrical Connection
35
Type
Total PV Input
Power Limit
Open-circuit
Voltage Limit
Short-circuit
Current Limit
SG3K-D
4000 W
600 V
24 A
SG4K-D
5200 W
600 V
24 A
SG5K-D
6500 W
600 V
24 A
SG6K-D
7800 W
600 V
24 A
SG8K3-D
10800 W
600 V
45 A
To avoid the
input power unbalance of the two inputs or input
load-restriction, ensure the two PV input cables are of the same type.
5.4.2 Assembling the PV Connector
All PV cables are equipped wi th the water-proof direct plug-in connectors which
match the PV t erminals at the bottom of the inverter.
The PV cables mu st be multi-core cable.
To ensure the protection degree IP65, only use the connectors
delivered or connectors with the same protection degree.
The requirements of PV cables ar e as follows.
Cross-section
Cable Diameter
Max. Withst and
Voltage
Max. Withst and
Current
4 mm2–6 mm2 6 mm–9 mm 600 V
Equal to or greater
than short-circuit
current
Procedure:
1. Strip the insulation from the cables
by 7 mm.
7mm
2. Assemble the cable ends
by crimping pliers.
Positive Crimp Contact
Negative Crimp Contact
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3. Lead the cable through cable gland, and insert into the insulator until it
snaps into pl ace. Then tighten the cable gland (torque 2.5 Nm to 3 Nm).
Crimp Contact
Positive Insulator
Cable Gland
Crimp Contact
Negative Insulator
Cable Gland
4. Make sure that the cable polarity of each PV string is correct before
connecting i t to the inverter.
The inverter will not function properly if any PV polari ty reversed.
If the PV connectors are not assembled into place, it may cause an arc
or overheat. The loss caused by thi s issue will void the warranty.
5.4.3 Installing the PV Connector
Connect the inverter to PV strings according to the fol lowing procedure.
1. Rotate the DC switch to “OFF”.
ON
OFF
2. Check the conn ection c able of the PV st ring for t he correct polarity and
that the open-c ircuit voltage does not e xceed the inverter input limit of
600 V, even under the lowest operating temperature. Refer to the module
specification supplied by the module manufacturer for detailed
information.
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User Manual 5 Electrical Connection
37
480
.0
.
0
The inverter will not function properly if any PV polarity is reversed.
Check the positive and negative polarity of the PV strings before
installation.
3. Plug the positive and the negative PV connectors into corresponding
terminal unt il there is an audible click.
+
-
PV
+
-
-
+
PV
+
PV
-
PV
* The image shown her e is for refer ence only. The actual product you r eceive
may differ.
4. (-D series) Seal the unused PV terminals with the termi nal caps.
5.5 RS485 Communication Connection
For the Wi-Fi installation, see the last step in section “4.4 Installing the
Inverter”. Mor e 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 def inition and waterproof procedure, please contact
SUNGROW.
Failure t o comply with t he requirement s of wiring or waterproofing will
void the warran ty.
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5.6 (Optional) Meter Communication Connection
The SUNGROW single-phase energy meter should be installed next to the
main switch.
Sungrow meter
Home Appliance
PV strings
A
Meter
link
Network
meter
Main
switch
Utility
grid
Solar switch
Inverter
5.6.1 On the Meter Side
For Single-phase Energy Meter
1. Take out the communication connector from inverter’s packaging and the
meter (with 1-phase sensor) and the cables from the meter’s packaging.
L
N
B
A
Power supply cable Meter RS485 cable
Communication connector
2. Unscrew t he swivel nut from the cabl e gland and rem ove the wat erpr oof
plug from the left inlet. Lead the A and B plugs fr om inside out through
the connector. This will result in the cable with the RJ45 plug on the
inside end, and the A and B plugs on the outside.
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User Manual 5 Electrical Connection
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3. Connect the cables to the meter.
− (a) Tighten the power s upply wi res to
terminal 3 (L) and terminal 6 (N).
−
(b) Tighten the RS485 wires to
terminal 2 and terminal 5.
− (c) Place t he 1-phase sensor around
the phase wire (L
) from the main
switch.
The CT clamp of 1-
phase sensor
can be placed before or after the
main switch.
N
Grid
Load
L
c
a
b
Make sure that th e CT clamp of 1-phase sensor is instal led in the right
direction: the arrow
on the sensor must point away from the grid
towards the lo ad.
For Three-phase Energy Meter
1. Take out the communication connector from inverter’s packaging, and
the meter and RS485 cable from t he meter’s packaging.
B
A
Meter RS485 cableCommunication connector
2. Unscrew t he swivel nut from the cabl e gland and rem ove the wat erpr oof
plug from the left inlet. Lead the A and B plugs fr om inside out through
the communic ation connec tor. This will res ult in the c able with the RJ 45
plug on the ins ide end, and the A and B plugs on the outside.
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3. Connect the A and B plugs to terminals A and B on the Energy Met er, as
shown below.
A
B
4. Strip the ins ulation from the power wires by 10 mm. Then connect the
wires to the terminals on the Energy Meter, as shown below.
(Cross-section: 10 mm
2
to 25 mm2)
OUT
IN
Load side
Grid side
The line c onduct or L1 suppl i es power t o t he Energy M eter. At least
the line conductor L1 and the neutral conductor must be connected
to the Energy Meter.
Just c onnect the l ine c onduct or L1 a nd the ne utr al conduc tor, then
the three-phase Energy Meter can be used as a single-phase
meter.
5.6.2 On the Inverter Side
Proceed as follows to connect the RS485 wires to the inverter.
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1. Loosen the screws and
remove the waterproof lid
from the RS485|DRM
terminal.
Note:
Retain the screws for later
installation.
2. Insert the RJ45 plug into the
lef
t (Meter) port until it
makes a “click” sound.
3. Secure the water proof lid to
the inverter bot t om wi th f our
screws, t
hen fasten the
cable gland.
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42
6 Commissioning
Proper commissioning is essential for the system, to protect it against fires,
injury and elec tric shock.
6.1 Inspection before Commissioning
Check the following items before starting the inverter:
1. All the instal lation sites are convenient for operation, maintenance and
service.
2. Check and confirm that the inverter is firmly installed.
3. Space for venti lation is sufficient for one inverter or m ultiple inverters.
4. Nothing is l eft on the top of the inverter.
5. The inverter and accessories are correctly connected.
6. Cables are routed in a safe place or protected against mechanical
damage.
7. The selecti on of the AC circ uit breaker is in ac cordance to this manual
and all applicable local standards.
8. All unused ter m inals at the bottom of the inverter are pr operly sealed.
9. Warning signs and label s are suitably affixed an d durable.
6.2 Button Function
Inverter offer s two but tons wit h multipl e functi ons. Pleas e refer to t he followi ng
table before a ny operation of the inverter.
Tab. 6-1 Butt on functi on
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”.
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6.3 Commissioning Procedure
Make sure all the above mentioned it em s meet the requirem ents.
1. Connect the external AC circuit breaker.
2. Rotate the DC switch to “ON”.
3. If ther e i s suffi cient sunli ght, the inverter will enter the r unning s tate and
start to feed AC power to the grid. The L CD screen wi ll be acti vated 5s
later.
Pac:
Status:
3456W
Running
Startup
80%
3456W
Standby
Pac:
Status:
4. Observe the status of the indicator.
Tab. 6-2 Indicator Status Description
Status
Description
Green
Steady on.
The inverter is running norm ally, 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.
Flash slowly every 1s.
PV faults.
More detailed i nformation on the indicator of the communication module can b e
found in the res pective Quick Guide.
5. Visit www.isolarcloud.com or iSolarCloud App to view inverter
information.
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44
7 LCD Operation
7.1 Button Function
The inverter offers two buttons with multiple functions. Please refer to the
following table before any opera tion of the inverter.
Tab. 7-1 Butt on functi on
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 comp onents!
Do not touch any hot par ts ( such a s he at sinks) duri ng ope r ati on. Onl y
the buttons and the D C sw itch can safely be touched at any tim e.
7.2 Main Screen
After successful commissi oning, the LCD screen wi ll enter the main screen.
Pac
:
Status
:
3456
W
Running
Inverter power
Inverter status
If there is no button operation for :
1 minute, LCD bac klight will be automat ically deactivat ed;
2 minutes, system will return t o the default screen ( m ain screen).
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When there is no button operation for more than 8 seconds on the main screen,
the displaye d information wi ll automatic ally cycle t hrough to provide addi tional
data: Main screen, energy, PV data, utility grid data. The screen will cycle every
2 seconds. Press any button to quit t his mode.
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 inform ation will be displayed.
Tab. 7-2 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 firmware is upgrading.
Error xxx
If an error occurs, the inverter will automatically stop operation,
trigger the AC relay and show “Error xxx” on the LCD with the
indicator red (xxx is the error code).
Once the error is cleared in recovery time, the inverter will
automatically try to resume normal operation. The recovery
time can be set via the App.
If the device is in standby mode for more than 10 minutes, please
check:
Whether the insolation is sufficient and the PV connection is correct.
If no anomaly is found, disconnect and recon nect the DC swi tch and
the main swit ch to restart.
If it still does not work, contact SUNGROW.
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Viewing the Active Error/Warning
If the status on t he main s creen is “Error xxx”,
Touch ENT to view t he active error code.
If the inverter is running with a warning, Touch
ENT to view the active warning code.
Only one error or warning can be displayed on
this screen. Refer to “8.1 Troubleshooting”
for a solut ion.
Error
010
Warning
514
or
7.3 Menu Structure
For the running i nformation, t he power values indic ated repres ent the averag e
value during t he time interval.
The energy yields displayed are indicative only. For the actual yields, please
refer to the energy meter of the utility grid.
Run Info
Settings
Time
Country
Error Record
Grid Prot. Param
Main Menu
Zero-export
Password: 111
Device Info
ON/OFF
Existing Inverter
Password: 111
DRM Switch
Param Reset
Energy Adj.
GND Detect
Comm. Param
Ethernet Config
PF
* Reserved
* Not support!
Fig. 7-1 LCD Menu Tree
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47
7.4 Viewing Running Info
Proceed as follows to look through t he detailed running information.
Main Screen (Pr ess ENT)→Menu→Run Info (Press ENT)
Scroll pages by touching ENT / ESC.
E-total: 1999kWh
E-today: 20.0kWh
Grid Vtg:
Grid Frq:
221.7V
60.0Hz
Meter Power:
2210W
P
max
Limit:
100%
Ipv1: 2.9A
Vpv1: 250.0V
Ipv2: 2.6A
Vpv2: 244.4V
Pac:
Iac:
1338.5W
6.0A
Meter power:
+ (omitted): The inverter is sourcing power to the grid.
-: The inverter is sinking power from the grid.
P
max
limit: only indicated f or the derating i n the event of over -temperature,
overvoltage or over-frequency.
7.5 Advanced Settings
7.5.1 Inputting the Password
The parameter s ettings are protec ted with a password. I f you want to set the
inverter’s parameters, you have to input the cor rect password.
Main Screen (Pr ess ENT)→Menu (Touch ESC)→Settings (Press ENT)
Touch ESC to add the value
and Touch ENT to move the
cursor. Input the password 111.
Password: 1 1 1
Press ENT to confirm the password and enter the submenu.
Touch ESC to navigat e down and Press ENT t o confirm.
Grid Prot. Param
Param Reset
DRM Switch
Zero-export
PF
Energy Adj.
Ethernet Config
Comm. Param GND Detect
Existing Inverter
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7.5.2 Setting Protective Parameters
Protective parameters are designed for the threshold values that can trigger the
protective f unction of the invert er. The threshold val ues are compliant wit h the
requirements of local saf ety standards and the utility grid.
If the protection f unction is trigger ed, the inverter wi ll automatic ally disconnect
from the grid with the ”Error xxx” state displayed on the LCD main screen. After
the grid voltage or frequency recovers to the specif ied range, the inverter will
start running normally and can reconnec t to the grid.
Touch ESC to choose t he item and press ENT t o enter the setting interface.
Volt-watt
Single/Mul Prot.
Prot. Recover
Grid Prot. Adj.
10 Min Over Vtg En.
* The settings for “10 Min Over Vtg En”. and “Volt-watt” are invalid for the
country code “BRA”.
Single/Multiple Protection
Touch ESC to chang e the value and touch ENT to move the cursor .
Confirm settings by pressing ENT.
Confirm settings and scroll pages by pressing ENT.
2-Vmax: 242.0V
2-
Vmin: 176.0V
1-Vmax: 242.0
V
1-Vmin: 176.0V
Multi
. stage
Single
stage
Vmin: 176.0V
Vmax: 242.0V
Tab. 7-3 Protective Parameters Explanation and the Range
Parameter Explanation Range (V)
V
max
Grid over-voltage
230.0–277.0
V
min
Grid under-voltage
176.0–230.0
1-V
max
Grid over-voltage 1 (V>)
230.0–277.0
2-V
max
Grid over-voltage 2 (V>>)
230.0–277.0
1-V
min
Grid under-voltage 1 (V<)
176.0–230.0
2-V
min
Grid under–voltage 2 (V<<)
176.0–230.0
Tab. 7-4 Default Protective Parameters
Parameter
Default Value for “BRA”
Default Value for “MX”
220 V
230 V
240 V
220 V
230 V
240 V
V
max
(V)
242.0
253.0
264.0
231.0
241.5
252.0
V
min
(V)
176.0
184.0
192.0
209.0
218.5
228.0
1-V
max
(V)
242.0
253.0
264.0
231.0
241.5
252.0
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User Manual 7 LCD Operation
49
Parameter
Default Value for “BRA”
Default Value for “MX”
220 V
230 V
240 V
220 V
230 V
240 V
2-V
max
(V)
242.0
253.0
264.0
231.0
241.5
252.0
1-V
min
(V)
176.0
184.0
192.0
209.0
218.5
228.0
2-V
min
(V)
176.0
184.0
192.0
209.0
218.5
228.0
Too high grid voltage may affect the normal usage and the
life of
household loads. The loss of any or all the warranty rights may follow if
the protection set-point is beyond the specified r ange.
Protection Recover
Vmax-rec (230.0 V–277.0 V):
Recovery value for over-voltage error. Inverter will
start oper ating when t he grid vo ltage fal ls below t his
value.
Vmin-rec (176.0 V –230.0 V):
Recovery value f or under-voltage error. Inverter will
start operating when the grid voltage is above this
value.
Vmax-rec: 242.0V
Vmin-rec: 176.0V
Tab. 7-5 Default Recovery Parameters
Parameter
Default for “BRA” Grid
Default for “MX” Grid
220 V
230 V
240 V
220 V
230 V
240 V
V
max-rec
(V)
242.0
253.0
264.0
231.0
241.5
252.0
V
min-rec
(V)
176.0
184.0
192.0
209.0
218.5
228.0
Grid Protection Voltage Adjusting
All Sungrow’s inverters are compliant with the local standard related to grid
protection requirements. In order to work with unstable utility grids, inverters are
equipped with automatic protection voltage adjusting function (disabled by
default). This mode can be enabled via the LCD.
OFF: the function is disabled by default. The grid protection voltage cannot
automatically adjust.
ON: enables the protection f unction. The inverter will automatical ly adjust the
protection threshold to a higher value so as to be normally connected to the grid
in the event of gri d over -volt ag e. The V
max-rec
will be adj us ted t he sam e wit h t he
V
max
, with an upper limit value not higher than V
max
.
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50
If the setting is changed from ON to OFF, you should
set the protection voltage as specified in Tab. 7-3
according to local protection requirement.
OFF ON
If the grid voltage adjusting f unction is set to ON, the power derating
function for over-voltage will be automat ically disabled.
If the line voltage or frequency goes outside pre-determined
parameters, the inverter must shut down for safety purposes, which
means it is not a faul ty inverter in these instanc es. High line voltages
may damage home appliances and Sungr ow is not held r esponsible or
liable for these issues.
7.5.3 Zero-export Setting
Touch ENT / ESC to select and press ENT to confirm.
Touch ESC to change the value and touch ENT to move the cursor. Press
ENT to confirm the settings.
OFF: all the power will be exported to the grid (by
default).
ON: no power will be exported to the gri d.
Partial: part of the output pow er will be expor ted to
the grid.
Total Export: the export power upper limit of the whole
system.
ONOFF
Total Export: 1000W
Partial
(0W–5000W)
The range of export power will automatically change:
When the existing inverter is di sabled: 0 to (rated power of the inverter)
When the existing inverter is enabled:
The lower limit is the rated power of existing inverter.
The upper limit is ([rated power of the exist ing inverter] + rat ed power of the
inverter).
For example, retrofit an existing PV system (rated power: 2000 W) with
SG5K-D (rated power : 5000 W ). The tot al expor t range wi l l be 2000 W – 7000
W.
A prompt will appear when you set it for the s econd
time.
Set by solar
professionals only！
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User Manual 7 LCD Operation
51
With the password 111, the zero -export setting c an only be done at the
first time. The later modifi cation can be performed by professionals only,
please contact SUNGROW.
7.5.4 Adding the Existing Inverter
Rated-P: rat ed pow er of the existing inverter.
This function is OFF by default. If the existing
inverter is set to ON, its r ated power is the lower
limit for export power setti ng.
ONOFF
Rated-P:
Existing Inverter
(0W
~30000W
)
2000W
7.5.5 PF Setting
The inverter is capable of operat ing with fixed power factor.
The PF ranges from 0.8 leading (+) to 0.8 lagging (-).
+ (Leading): the inverter is sourcing reactive power to
the grid.
- (Lagging): the inverter is sinking reactive power
from the grid.
PF： +
1.000
7.5.6 Parameter Reset
All settable
parameters will return to the default values once the
“Param Reset” operation is perfo rmed.
Press ENT to confirm the operati on.
Press ESC to dis card the operation.
Confirm resume
setting?
7.5.7 Energy Adjustment
If the accumul ative val ue “E-total” displ ayed on invert er sc reen is different fr om
the value indicated on the metering device, you should adjust the energy
deviation.
(Energy Adj. value) = (Real m easured value) - (E-total reading value)
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52
Touch ESC to add the value and Touch ENT to
move the cursor. Press ENT to confirm the setting.
The “+” can be changed to “-” by touching ESC.
The adjustment rangs from -9999 kWh to +9999
kWh.
+0000
kWh
7.5.8 Setting Communication Parameter
Touch ESC to set the appropr iate value and touch
ENT
to move the cursor. Confirm settings by
pressing ENT.
Device address range: 1-247.
Modbus ID: 001
7.5.9 Ethernet Configuration
The Ethernet setting is reser ved for later usage.
Touch ENT to select and press ENT to confirm.
OFF: The IP address should be assigned manually.
ON: Automatically assign an IP address from the
home router.
Touch ESC to switch between the DHCP and the IP
interfaces.
ONOFF
IP:
DHCP
:
192.168
.001.
100
7.6 Starting/Stopping the Inverter
Main Screen (Pr ess ENT)→Menu (Touch ESC)→ON/OFF (Press ENT)
Touch ENT / ESC to select and press ENT to
confirm.
ON OFF
Confirm your selection by pressing ENT.
Confirm turn on? Confirm turn off?
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53
7.7 Viewing the Error Record
Main Screen (Press ENT)→Menu (Touch ESC)→Error Record (Press
ENT)
Scroll pages by touching ENT / ESC.
3 records can be displayed on each page and
20 records at most for all.
Press ESC to exit.
2 15/01/21 09:10:08 004
1 15/
01/21 09
:10:12 010
3 15/
01/21 09
:11:08 005
P1/7
7.8 Setting the Time
The correct system time is very important. If there is deviation between the
system time and t he l ocal t ime, the inver t er w il l not operat e nor m all y. The clock
is in 24-hour format.
Main Screen (Pr ess ENT)→Menu (Touch ESC)→Time (Press ENT)
DD, MM, and YY stand for day, month, and year
respectively.
hh, mm, and ss stand for hour, minute, and
second respectively.
Scroll pages by pressing ENT.
Date: 05
/ 01 / 17
Time: 10 : 30 : 05
DD / MM / YY
hh
: mm
:
ss
7.9 Setting the Country
To make the protection parameters setting convenient, inverter provides built-in
protection parameters for certain countries. The country setting is protected
with a password.
Main Screen (Pr ess ENT)→Menu (Touch ESC)→Country (Press ENT)
Touch ESC to add the value and Touch ENT to
move the cursor. Input the password 111.
Password: 1 1 1
Touch ENT / ESC to choose the country and press
ENT to confirm.
If the country selected is not in the list, please
choose “Other” and then set
the protection
parameters m anually.
GB
DE
FR
ES
BE
NL
AT
AU
CN
CZ
SE
KR
TH
LUX
MX
NZ
BRA
IT
Other
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7 LCD Operation User Manual
54
Tab. 7-6 Country Code Description
Code
Full Name
Language
Code
Full Name
Language
GB
Great Britain
English
BRA
Brazil
Portuguese
DE
Germany
German
CN
China
Chinese
FR
France
French
SE
Sweden
English
IT
Italy
Italian
TH
Thailand
English
ES
Spain
English
KR
Korea
English
AT
Austria
German
LUX
Luxemburg
German
AU Australia English NZ
New
Zealand
English
CZ Czech English NL Netherlands English
BE Belgium English MX Mexico Spanish
Other
Country not
included above
English - - -
The country code “Other” represents 50 Hz grid and 60 Hz grid. The inverter will
automatically choose 50 Hz or 60 Hz according to the loc al grid frequency.
If the count ry code is set to “ BRA” or “MX”, the grid
voltage setting will appear. Touch ENT / ESC to
choose the grid voltage and press ENT to confirm.
220V
230V
240V
7.10 Viewing Device Info
Main Screen (Press ENT)→Menu (Touch ESC)→Device Info (Press
ENT)
These interfaces show the read-only information.
Scroll pages by touching ENT / ESC .
Press ESC to exit.
SG3K
-S
Device Type:
SN:
A1610090001
Country:
BRA
Version
:
CrysG
2-V31
_FW_
V22
Page 63
55
8 Troubleshooting and
Maintenance
8.1 Troubleshooting
8.1.1 LED Indicator
See “Tab. 6-2 Indicator Status Description” for the definition.
Fault Type
Troubleshooting
LED indicator
cannot be lit.
1. Disconnect the AC circuit breaker.
2. Rotate the DC switch to “OFF”.
3. Check the polarity of DC input.
Green indicator
goes out.
1. Disconnect the AC circuit breaker.
2. Rotate the DC switch to “OFF”.
3. Check the inverter electrical connection. Refer to “5
Electrical Connection”.
4. Check whether the voltage of DC input exceeds the
inverter start-up voltage.
5. If all the above conditions are OK, please contact
SUNGROW.
8.1.2 Errors on the App or LCD Screen
If an error occurs, the “Error” st ate wil l be shown on the m ain sc reen. W e need
the following information to provide you with the best assistance:
inverter type (e.g. string, central, grid-connected, hybrid, transformerless,
single phase, triple phase, single MPPT, multi ple MPPTs);
product name;
serial number of the inverter;
error code / name; and
a brief description of the problem.
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8 Troubleshooting and Maintenance User Manual
56
Code
Description
Troubleshooting
002
Grid over-voltage.
The grid voltage
exceeds the protective
value.
1. Check the voltage of the grid.
2. If the grid voltage exceeds the
permissible range of inverter protection
parameters, ask utility grid company for
solution.
3. If the grid voltage is within the permissible
range, contact Sungrow Service Dept.
003
Transient over-voltage.
The g
rid transient
voltage exceeds the
protective value.
1. This is a short-term fault due to grid
condition. Wait a moment for inverter
recovery.
2. If the fault persist
s, please contact
Sungrow Service Dept.
004
Grid under-voltage.
The grid voltage is
below
the protective
value.
1. Check the grid voltage.
2. If the grid voltage exceeds the
permissible range of inverter protection
parameters, ask utility grid company for
solution.
3. If the grid voltage is within the permissible
range, contact Sungrow Service Dept.
005
Grid under-voltage.
The grid voltage is
below
the protective
value, which is lower
than the protective
value of error 004.
1. This is a short-term fault due to grid
condition. Wait a moment for inverter
recovery.
2. If the fault persist
s, please contact
Sungrow Service Dept.
006
AC over-current.
The AC output current
exceeds inverter
allowable upper limit.
1. The inverter will resume if the output
current falls below the protection value.
2. If the fault persists, please contact
Sungrow Service Dept.
007
Transient AC
overcurrent.
1. The inverter will self-recover after several
seconds.
2. If the fault persists, please contact
Sungrow Service Dept.
008
Grid over-frequency.
The grid frequency
exceeds the protective
value.
1. Check the grid frequency.
2. If the grid
frequency exceeds the
permissible range of inverter protection
parameters, ask utility grid company for
solution.
3. If the grid frequency is within the
permissible range, contact Sungrow Service
Dept.
009
Grid under-frequency.
The grid frequency is
below
the protective
value.
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User Manual 8 Troubleshooting and Maintenance
57
Code
Description
Troubleshooting
010 Grid failure (Islanding)
1. Check whether AC circuit breaker is
triggered.
2. Check whether AC cables are all firmly
connected.
3. Check whether grid is not in service.
4. If all conditions are OK and this fault still
occurs in the LCD screen, contact Sungrow
Service Dept.
011
DC injection
over-current.
The DC current
injection of AC current
exceeds the upper
limit.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
012
Leakage current
over-current.
The leakage current
exceeds the upper
limit.
1. Check the PV strings for ground fault.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
014
10-
minute grid
over-voltage.
The average grid
voltage exceeds the
permissible range for
over 10 minutes.
1. Check whether the inverter selected
country code is the country you are in.
2. Wait a moment for inverter recovery.
3. Check the voltage of the grid. If the gri d
voltage exceeds the permissible range of
inverter protection parameters, ask utility
grid company for solution.
4. If the fault occurs repeatedly, contact
Sungrow Service Dept.
015
Grid over-voltage
The grid voltage
exceeds the protective
value, which is higher
than the protective
value of error 002.
1. Check the model of the AC cables.
2. Wait a moment for inverter recovery.
3. If the grid voltage exceeds the
permissible range, ask utility grid company
for solution.
4. If the fault occurs repeatedly, contact
Sungrow Service Dept.
016
The bus voltage or
power is high.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
019
Bus transient
over-voltage.
The transient bus
voltage exceeds the
protective value.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
020
Bus over-voltage.
The bus voltage
exceeds the protective
value.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
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8 Troubleshooting and Maintenance User Manual
58
Code
Description
Troubleshooting
021 PV1 input over-current.
Check the layout and the wiring of PV1
input.
022 PV2 input over-current.
Check the layout and the wiring of PV2
input.
028
PV1 reverse
connection.
Check the cable connections of PV1.
029
PV2 reverse
connection.
Check the cable connections of PV2.
036
The temperature of
radiator is too high.
1. Check whether the ambient temperature
shown on the screen is too high. Wait a
moment for inverter recovery.
2. Check whether there is enough space for
convection.
3. Check whether the inverter is in direct
sunlight.
4. Check whether the fan is normal.
Replace it if necessary.
5. Clean the air inlets.
6. If the fault persists, please contact
Sungrow.
037
The internal
temperature of inverter
is too high.
038
Relay fault on the grid
side.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
039
The insulation
resistance
of PV to
earth is low. (ISO-flt)
1. Check whether there is a reliable inverter
grounding line.
2. Check whether one of the PV strings is
short-circuited with ground.
3. Wait a moment for inverter recovery.
4. If the fault occurs repeatedly, contact
Sungrow Service Dept.
041
Leakage current
sampling fault.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
043
Inner
under-temperature
fault.
The ambient
temperature inside the
inverter is too low.
The inverter will recover once the ambient
temperature rises above -25℃.
044
Open-loop inverter
self-test fault.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
045
PV1 boost circuit fault.
046
PV2 boost circuit fault.
048
Phase current
sampling fault.
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User Manual 8 Troubleshooting and Maintenance
59
Code
Description
Troubleshooting
053
The slave DSP detects
that the
grid voltage
exceeds the protective
value.
1. Check the grid voltage.
2. If the grid voltage exceeds the
permissible range of inverter protection
parameters, ask utility grid company for
solution.
3. If the grid voltage is within the permissible
range, contact Sungrow Service Dept.
054
The slave DSP detects
that the grid frequency
exceeds the protective
value.
1. Check the grid frequency.
2. If the grid frequency exceeds the
permissible range of
inverter protection
parameters, ask utility grid company for
solution.
3. If the grid frequency is within the
permissible range, contact Sungrow Service
Dept.
056
The slave DSP detects
that the leakage
current exceeds the
protective range.
1. Check whether there is a grounded fault
of the PV string.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
059
Communication alarm
between master DSP
and slave DSP.
1. Wait 1 minute for inverter recovery.
2. If the fault persists, contact Sungrow
Service Dept.
061
Alarm for no inverter
type setting.
Contact Sungrow Service Dept.
070 Fans are defective
Stop the inverter and disconnect the AC &
DC cables. Check whether the fan duct has
been blocked. If not, replace fans.
084
Warning for reverse
cable connecti on of the
Sungrow Meter.
1. Check whether the power cable
connections are correct.
2. If “Existing Inverter” is set to “ON” via
LCD menu, check and ensure that its rated
power is correctly set.
3. For Sungrow single-phase meter, check
whether the CT clamp of the 1-phase
sensor is correctly placed. Refer to “5.7.1
On the Meter Side”.
085
Mismatched software
version.
Please contact Sungrow Service Dept.
100
The AC output current
exceeds the upper
limit.
1. The inverter will resume if the output
current falls below the protection value.
2. If the fault persists, please contact
Sungrow Service Dept.
101
Grid over-frequency.
The grid frequency
exceeds the protective
value, which is higher
than the protective
value of error 008.
1. Check the grid frequency.
2. If the grid frequency exceeds the
permissible range of inverter protection
parameters, ask utility grid company for
solution.
3. If the grid frequency is within the
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60
Code
Description
Troubleshooting
102
Grid under-frequency.
The grid frequency is
below
the protective
value, which is lower
than the protective
value of error 009.
permissible range, contact Sungrow Service
Dept.
106
Abnormal grounding.
Neither the PE terminal
on the AC connection
block nor the second
PE terminal on the
enclosure is reliably
connected.
Check whether there is a reliable inverter
grounding line, if there is access to the
ground, and the fault persists, please
contact Sungrow Service Dept.
200
Bus hardware
over-voltage fault.
The bus voltage
exceeds the protective
value.
1. Wait for
inverter recovery after bus
voltage lower.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
201
The bus voltage is too
low.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept.
202
PV hardware
over-current fault.
The PV1 or PV2
current exceeds the
protective value.
If the fault occurs repeatedly, contact
Sungrow Service Dept.
203
The PV input voltage
exceeds the bus
voltage.
Check the functionality of the PV connection
terminals.
306
Input and output power
mismatching fault.
If the fault occurs repeatedly, contact
Sungrow Service Dept.
315
PV1 current sampling
fault.
Channel sampling anomaly.
Contact Sungrow Service Dept.
316
PV2 current sampling
fault.
320
Leakage current
sensor
fault.
Contact Sungrow Service Dept.
409
Both the ambient
temperature sensor
and the radiator
temperature sensor
fail.
If the fault occurs repeatedly, contact
Sungrow Service Dept.
503
Ambient temperature
sensor
open circuit
warning.
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User Manual 8 Troubleshooting and Maintenance
61
Code
Description
Troubleshooting
504
Ambient temperature
sensor
short circuit
warning.
505
Radiator temperature
sensor
open circuit
warning.
506
Radiator temperature
sensor
short circuit
warning.
501
External memory
reading/writing
warning.
1. Inverter can normally be connected to the
grid.
2. Power on the inverter again. If the fault
persists, cont act Sungrow Servic e Dept.
514
Abnormal
communication
warning of the
Sungrow Meter.
(Inverter can be
normally connected to
the grid.)
1. Check whether the power cable
connections of the meter are correct.
2. Check whether the RS485 connection is
correct.
8.2 Routine Maintenance
Risk of inverter damage or personal injury due to incorrect service!
Always keep i n mind that t he inverter is powered b y dual sources: PV
strings and utility grid.
Before any ser vice work, observe the following procedure.
Disconnect the AC circuit breaker and then set the DC load-break
switch if the inverter to OFF;
Wait at least 10 minutes for inner capacitors to discharge completely;
Verify that there is no voltage or current before pulling any connector.
Keep non-related persons away!
A temporary warning sign or barrier must be posted to keep
non-related perso ns away while performing electrical connection and
service work.
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8 Troubleshooting and Maintenance User Manual
62
Risk of inverter damage if it is im properly serviced.
Use accessories and spare parts approved by the inverter
manufacturer only. Never modify the inverter or other components of
the inverter.
Unauthorized al terations will void guar antee and warrant y claims and
in most cases term inate the operat ing licen se. SUNGROW shal l not be
held liable f o r any damage caused by such ch anges.
Any malfuncti on that ma y impair th e inverter safety operation must be
repaired imm ed iately before the inverter is restarted.
Inverter cont ains no c ustomer ser viceabl e part s inside. Plea se cont act
local authorized personnel if an y service work is requir ed.
Servicing of the device in acc ordance with the manual should never
be undertaken i n the abs enc e of proper t ools , test equi pment s or t he
more recent revision of the manual which has been clearly and
thoroughly understood.
Items
Methods
Period
System
clean
Check the temperature and dust of the
inverter. Clean the inverter enclosure.
Check the humidity and dust of the
environment. Meanwhile check whether
the filter function of the air inlet is ok.
Six months to a year (it
depends on the dust
contents in air.)
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63
9 System Decommissioning
9.1 Disconnecting the Inverter
For maintenance or other service w ork, the inverter m ust be switched off.
Proceed as follows to disconnect the inverter from the AC and DC power
sources. Lethal voltages or damage to the inverter will follow if otherwi se.
1. Stop the inverter via the LCD menu. For details, see “7.6
Starting/Stopping the Inverter”.
2. Disconnect the AC circuit breaker and secure it against reconnection.
3. Rotate the DC switch to “OFF”. Disconnect the external DC circuit
breaker.
Please stri ctly follow the sequence of the above procedures. Inverter
will not work normally if otherwise.
4. Wait about 10 mi nutes unt il t he capac itor s insi de the inver ter c omplet ely
discharge.
5. Measure to confirm that the AC output at the AC circuit breaker is voltage
free.
6. Remove the AC connector. Lay the tool in the locat ion of snap and press
the tool down. Then snap can be pushed from the AC terminal.
7. Release the l ocking par t of PV connec tors by pr essi ng on the ri bbing of
the locki ng hooks with nipper pliers and pull it outwar ds.
Press the ribbing Pull outwards Disconnect DC connectors
For further disconnection and conductor reconnection instruction,
please visi t the webpage of respec tive component manufacturer.
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9 System Decommissioning User Manual
64
9.2 Dismantling the Inverter
Risk of burn in juries and electric shock!
Do not touch any inner live
parts until at least 10 minutes after
disconnecting the inverter from the utility gri d and the PV input.
1. Refer to “5 Electrical Connect ion” for the invert er disconnection of all
cables in reverse steps.
2. Dismantle t he inverter referr ing to “4 Mechanical Mounting” in reverse
steps.
3. If necessary, remove the wall-mounting bracket from the w all.
4. If the inverter will be reinstalled in the future, please refer to “3
Unpacking and Storage” for a proper conservation.
9.3 Disposing of the Inverter
Users take the responsibilit y for the disposal of the inverter.
Some parts and devices of the inverter, such as the capacitors, may
cause environment pol lution.
Do not dispose of the product together with household waste but in
accordance with the disposal regulations for
electronic waste
applicable at the installati o n site.
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65
10 Appendix
10.1 Technical Data
10.1.1 –S Ser ie s
Parameters
SG2K-S
SG3K-S
Input Data
Max. PV input power
3000 W
4000 W
Max. PV input voltage
600 V
Startup voltage
120 V
Nominal input voltage
360 V
MPP voltage range
90 V–560 V
MPP voltage range for nominal
power
210 V–480 V 310 V–480 V
No. of MPPTs
1
Max. number of PV strings per
MPPT
1
Max. PV input current
10 A
Max. current for input connector
12 A
Short-circuit current of PV input
12 A
Max. inverter backfeed current to
PV string
0 A
Output Data
Nominal AC output power
2000 W
3000 W
Max AC output apparent power
2000 VA
3000 VA
Max. AC output current
9.1 A
13.7 A
Max. inrush current
(peak value / duration)
8 A / 12 ms
Max. output fault current
(peak value / duration)
80 A / 3.2 ms
Max. output over-current protection
25 A
Nominal AC voltage
220 Vac / 230 Vac / 240 Vac
AC voltage range
176 Vac–276 Vac
(this may vary with grid standards)
Nominal grid frequency
60 Hz
Grid frequency range
55 Hz–65 Hz
(this may vary with grid standards)
Total harmonic distortion (THD)
< 3 % (of nominal power)
DC current injection
< 0.5 % (of nominal current)
Power factor
> 0.99 at default value at nominal power
(adj. 0.8 leading–0.8 lagging)
Protection
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Parameters
SG2K-S
SG3K-S
PV reverse connection protection
Yes
AC short circuit protection
Yes
Leakage current protection
Yes
Anti-islanding protection
Yes (frequency shift)
DC switch
Yes
Overvoltage category
III [AC], II [DC]
Overvoltage protection
II [AC]
Safety protection class
I
System Data
Max. efficiency
98.2 %
98.2 %
Max. European efficiency
97.2 %
97.7 %
Isolation method
Transformerless
Ingress protection rating
IP65
Pollution degree outside/inside the
enclosure
3 / 2
Power loss in night mode
< 1 W
Operating ambient temperature
-25℃ to +60℃
Allowable relative humidity
0–100 % (non-condensing)
Cooling method
Natural cooling
Max. operating Altitude
4000 m (derating when > 2000 m)
Display
Graphic LCD
Communication
Wi-Fi
PV connection type
MC4
AC connection type
Plug and play connector
Certification
IEC 62109-1, IEC 62109-2, IEC 62116,
IEC 61727, EN 61000-6-2, EN 61000-6-3,
AS4777.2, ABNT NBR 16149, ABNT NBR
16150, VDE-AR-N-4105, CEI 0-21,
VDE0126-1-1, UTE C15-712, VFR-2014,
EN50438, C10/11, G83/2, G59/3
Mechanical Data
Dimensions (W x H x D)
300 mm x 370 mm x 125 mm
Mounting method
Wall-mounting bracket
Weight
8.5 kg
10.1.2 –D Series
Parameters
SG3K-D
SG4K-D
Input Data
Max. PV input power
4000 W
5200 W
Max. PV input voltage
600 V
Startup voltage
120 V
Nominal input voltage
360 V
MPP voltage range
90 V–560 V
MPP voltage range for nominal
160 V–480 V
210 V–480 V
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Parameters
SG3K-D
SG4K-D
power
No. of MPPTs
2
Max. number of PV strings per
MPPT
1
Max. PV input current
20 A (10 A / 10 A)
Max. current for input connector
24 A (12 A / 12 A)
Short-circuit current of PV input
24 A (12 A / 12 A)
Max. inverter backfeed current to
PV string
0 A
Output Data
Nominal AC output power
3000 W
4000 W
Max AC output apparent power
3000 VA
4000 VA
Max. AC output current
13.7 A
18.2 A
Max. inrush current
(peak value / duration)
8 A / 12 ms 10 A / 12 ms
Max. output fault current
(peak value / duration)
80 A / 3.2 ms 100 A / 3.2 ms
Max. output over-current protection
25 A
32 A
Nominal AC voltage
220 Vac / 230 Vac / 240 Vac
AC voltage range
176 Vac–276 Vac
(this may vary with grid standards)
Nominal grid frequency
60 Hz
Grid frequency range
55 Hz–65 Hz
(this may vary with grid standards)
Total harmonic distortion (THD)
< 3 % (of nominal power)
DC current injection
< 0.5 % (of nominal current)
Power factor
> 0.99 at default value at nominal power
(adj. 0.8 leading–0.8 lagging)
Protection
PV reverse connection protection
Yes
AC short circuit protection
Yes
Leakage current protection
Yes
Anti-islanding protection
Yes (frequency shift)
DC switch
Yes
Overvoltage category
III [AC], II [DC]
Overvoltage protection
II [AC]
Safety protection class
I
System Data
Max. efficiency
98.4 %
98.4 %
Max. European efficiency
97.7 %
98.0 %
Isolation method
Transformerless
Ingress protection rating
IP65
Pollution degree outside/inside the
enclosure
3 / 2
Power loss in night mode
< 1 W
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Parameters
SG3K-D
SG4K-D
Operating ambient temperature
-25℃ to +60℃
Allowable relative humidity
0–100 % (non-condensing)
Cooling method
Natural cooling
Max. operating Altitude
4000 m (derating when > 2000 m)
Display
Graphic LCD
Communication
Wi-Fi
PV connection type
MC4
AC connection type
Plug and play connector
Certification
IEC 62109-1, IEC 62109-2, IEC 62116,
IEC 61727, EN 61000-6-2, EN 61000-6-3,
AS4777.2, ABNT NBR 16149, ABNT NBR
16150, VDE-AR-N-4105, CEI 0-21,
VDE0126-1-1, UTE C15-712, VFR-2014,
EN50438, C10/11, G83/2, G59/3
Mechanical Data
Dimensions (W x H x D)
300 mm x 370 mm x 133 mm
Mounting method
Wall-mounting bracket
Weight
11.5 kg
Parameters
SG5K-D
SG6K-D
Input Data
Max. PV input power
6500 W
7800 W
Max. PV input voltage
600 V
Startup voltage
120 V
Nominal input voltage
360 V
MPP voltage range
90 V–560 V
MPP voltage range for nominal
power
260 V–480 V 315 V–480 V
No. of MPPTs
2
Max. number of PV strings per
MPPT (PV1/PV2)
1/1
Max. PV input current
20 A (10 A / 10 A)
Max. current for input connector
24 A (12 A / 12 A)
Short-circuit current of PV input
24 A (12 A / 12 A)
Max. inverter backfeed current to
PV string
0 A
Output Data
Nominal AC output power
5000 W
6000 W
Max AC output apparent power
5000 VA
6000 VA
Max. AC output current
22.7 A
27.3 A
Max. inrush current
(peak value / duration)
10 A / 12 ms
Max. output fault current
(peak value / duration)
100 A / 3.2 ms
Max. output over-current protection
32 A
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Parameters
SG5K-D
SG6K-D
Nominal AC voltage
220 Vac / 230 Vac / 240 Vac
AC voltage range
176 Vac–276 Vac
(this may vary with grid standards)
Nominal grid frequency
60 Hz
Grid frequency range
55 Hz–65 Hz
(this may vary with grid standards)
Total harmonic distortion (THD)
< 3 % (of nominal power)
DC current injection
< 0.5 % (of nominal current)
Power factor
> 0.99 at default value at nominal power
(adj. 0.8 leading–0.8 lagging)
Protection
PV reverse connection protection
Yes
AC short circuit protection
Yes
Leakage current protection
Yes
Anti-islanding protection
Yes (frequency shift)
DC switch
Yes
Overvoltage category
III [AC], II [DC]
Overvoltage protection
II [AC]
Safety protection class
I
System Data
Max. efficiency
98.4 %
98.4 %
Max. European efficiency
98.0 %
98.0 %
Isolation method
Transformerless
Ingress protection rating
IP65
Pollution degree outside/inside the
enclosure
3 / 2
Power loss in night mode
< 1 W
Operating ambient temperature
-25℃ to +60℃
Allowable relative humidity
0–100 % (non-condensing)
Cooling method
Natural cooling
Max. operating Altitude
4000 m (derating when > 2000 m)
Display
Graphic LCD
Communication
Wi-Fi
PV connection type
MC4
AC connection type
Plug and play connector
Certification
IEC 62109-1, IEC 62109-2, IEC 62116,
IEC 61727, EN 61000-6-2, EN 61000-6-3,
AS4777.2, ABNT NBR 16149, ABNT NBR
16150, VDE-AR-N-4105, CEI 0-21,
VDE0126-1-1, UTE C15-712, VFR-2014,
EN50438, C10/11, G83/2, G59/3
Mechanical Data
Dimensions (W x H x D)
360 mm x 390 mm x 133 mm
Mounting method
Wall-mounting bracket
Weight
11.5 kg
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Parameters
SG8K3-D
Input Data
Max. PV input power
10800 W
Max. PV input voltage
600 V
Startup voltage
120 V
Nominal input voltage
360 V
MPP voltage range
90 V–540 V
MPP voltage range for nominal
power
285 V–480 V
No. of MPPTs
2
Max. number of PV strings per
MPPT
1/2
Max. PV input current
12.5 A / 25 A
Max. current for input connector
15 A / 30 A
Short-circuit current of PV input
15 A / 30 A
Max. inverter backfeed current to
PV string
0 A
Output Data
Nominal AC output power
8300 W
Max AC output apparent power
8300 VA
Max. AC output current
36.1 A
Max. inrush current
(peak value / duration)
25 A / 12 ms
Max. output fault current
(peak value / duration)
93 A / 3.2 ms
Max. output over-current protection
40 A
Nominal AC voltage
220 Vac / 230 Vac / 240 Vac
(single-phase)
AC voltage range
176 Vac–276 Vac
(this may vary with grid standards)
Nominal grid frequency
60 Hz
Grid frequency range
55 Hz–65 Hz
(this may vary with grid standards)
Total harmonic distortion (THD)
< 3 % (of nominal power)
DC current injection
< 0.5 % (of nominal current)
Power factor
> 0.99 at default value at nominal power
(adj. 0.8 leading–0.8 lagging)
Protection
PV reverse connection protection
Yes
AC short circuit protection
Yes
Leakage current protection
Yes
Low voltage fault ride through
(LVFRT)
Yes
Anti-islanding protection
Yes (frequency shift)
DC switch
Yes
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Parameters
SG8K3-D
Overvoltage category
III [AC], II [DC]
Overvoltage protection
II [AC], II [DC]
Safety protection class
I
System Data
Max. efficiency
98.5 %
Max. European efficiency
98.0 %
Isolation method
Transformerless
Ingress protection rating
IP65
Pollution degree outside/inside the
enclosure
3 / 2
Power loss in night mode
< 1 W
Operating ambient temperature
-25℃ to +60℃
Allowable relative humidity
0–100 % (non-condensing)
Cooling method
Natural cooling
Max. operating Altitude
4000 m (derating when > 2000 m)
Display
Graphic LCD
Communication
Wi-Fi
PV connection type
MC4
AC connection type
Plug and play connector
Certification
IEC 62109-1, IEC 62109-2, IEC 62116,
IEC 61727, EN 61000-6-2, EN 61000-6-3,
AS4777.2, ABNT NBR 16149, ABNT NBR
16150, VDE-AR-N-4105, CEI 0-21,
VDE0126-1-1, UTE C15-712, VFR-2014,
EN50438, C10/11, G83/2, G59/3
Mechanical Data
Dimensions (W x H x D)
360 mm x 390 mm x 148 mm
Mounting method
Wall-mounting bracket
Weight
15.5 kg
10.2 Quality Assurance
When produc t faults occ ur during the war ranty peri od, SUNGROW will provide
free servi ce or replace the product with a new one.
Evidence
During the warranty period, the customer shall provide the product purchase
invoice and date. In addition, the trademark on the product shall be undamaged
and legible. O therwis e, SUNGROW has the right to refuse to honor t he qualit y
guarantee.
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72
Conditions
After repl acement, unqualified products shall be processed by SUNGROW.
The customer shall give SUNGROW a reasonabl e period to repair the faulty
device.
Exclusion of Liability
In the followi ng c ir c ums tanc es , SUNGROW has the right t o r efuse t o honor th e
quality guar antee:
If the free warranty period for the whole machine/compon ents have expired.
If the device i s damaged during transport.
If the device was incorrectly installed, refitt ed, or used.
If the device is oper ated in a very improper environment, as descr ibed in this
manual.
If the fault or damage was caused by installation, repairs, modification, or
disassembly performed by a service provider or personnel other than this
company.
If the fault or dam age was caused by the use of non-standard or
non-SUNGROW com ponents or software.
If the installation and use range are beyond stipulations of relevant
international standards.
If the damage was caused by an abnormal natural environment .
For faulty products in any of above cases, if the customer requests
maintenance, paid maintenance service may be provided based on the
judgment of SUNGROW.
Software Licenses
It is prohibi ted to use data contained i n firmware or sof tware developed by
SUNGROW, in part or in full, for commercial purposes by any means.
It is prohibi ted to reverse engineer, crack, or perform any other operations
that comprom ise the original pr ogram design of the software developed by
SUNGROW.
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User Manual 10 Appendix
73
Contact Information
Should you have any question about t his product, pleas e contact us.
We need the following information to pr ovide you the best as sistance:
Type of the inverter
Serial number of the inverter
Error code/name
Brief description of the problem
China (HQ)
Sungrow Power Supply Co., Ltd
Hefei
+86 551 6532783 4
Australia
Sungrow
Australia Group Pty.
Ltd.
Sydney
+61 2 9922 1522
Brazil
Sungrow Do Brasil
Sao Paulo
+55 11 2366 1957
France
Sungrow France – Siege Social
Paris
Germany
Sungrow Deuts chland GmbH
München
+49 89 324 914 761
Greece
Service Partner – Survey Digital
+30 210604421 2
India
Sungrow (India) Private Limited
Gurgaon
+91 080 41201350
Italy
Sungrow Italy
Milano
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10 Appendix User Manual
74
Japan
Sungrow Japan K.K .
Tokyo
+81 3 6262 9917
Korea
Sungrow Power Korea Limited
Seoul
+82 70 7719 1889
Malaysia
Sungrow SEA
Selangor Darul Ehsan
+60 19 897 3360
Philippines
Sungrow Power Supply Co., Ltd
Mandaluyong Ci ty
+63 9173022769
Thailand
Sungrow Thailand Co., Ltd.
Bangkok
+66 891246053
Spain
Sungrow Ibérica S.L.U.
Navarra
Romania
Service Partner - Elerex
+40 241762250
Turkey
Sungrow
Deutschland GmbH
Turkey Istanbul Representative
Bureau
Istanbul
+90 212 731 8883
UK
Sungrow Power UK Ltd.
Milton Keynes
+44 (0) 0908 414127
U.S.A, Mexico
Sungrow USA Corporation
Phoenix Arizona
+1 833 747 6937
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