Sungrow SG3.0RS-S, SG2.5RS-S, SG5.0RS, SG3.6RS, SG2.0RS-S User guide

1-Phase PV Grid-Connected Inverter
User Manual

SG2.0RS-S / SG2.5RS-S / SG3.0RS-S / SG3.0RS /
SG3.6RS / SG4.0RS / SG5.0RS / SG6.0RS

SG2.0RS-S /

SG2.5RS-S / SG3.0RS-S / SG3.0RS /

SG3.6RS / SG4.0RS / SG5.0RS /

SG6.0RS1-Phase PV Grid-

Connected InverterUser

ManualSG2.0-6.0RS-UEN-Ver15-

202111

SG2.0-6.0RS-UEN-Ver15-202111

All Rights Reserved

All Rights Reserved

No part of this document can be reproduced in any form or by any means without the prior
written permission of Sungrow Power Supply Co., Ltd (hereinafter "SUNGROW").

Trademarks

and other Sungrow trademarks used in this manual are owned by
SUNGROW.
All other trademarks or registered trademarks mentioned in this manual are owned by their
respective owners.

Software Licenses

• It is prohibited to use data contained in firmware or software developed by SUNGROW,

in part or in full, for commercial purposes by any means.

• It is prohibited to perform reverse engineering, cracking, or any other operations that

compromise the original program design of the software developed by SUNGROW.

I

About This Manual

The manual mainly contains the product information, as well as guidelines for installation,
operation, and maintenance. The manual does not include complete information about the
photovoltaic (PV) system. Readers can get additional information at

com

or on the webpage of the respective component manufacturer.

Validity

This manual is valid for the following model of low-power grid-connected PV string inverters:

• SG2.0RS-S

• SG2.5RS-S

• SG3.0RS-S

• SG3.0RS

• SG3.6RS

• SG4.0RS

• SG5.0RS

• SG6.0RS

It will be referred to as "inverter" hereinafter unless otherwise specified.

www.sungrowpower.

Target Group

This manual is intended for professional technicians who are responsible for installation, op­eration, and maintenance of inverters, and users who need to check inverter parameters.
The inverter must only be installed by professional technicians. The professional technician
is required to meet the following requirements:

• Know electronic, electrical wiring and mechanical expertise, and be familiar with electri­cal and mechanical schematics.

• Have received professional training related to the installation and commissioning of elec­trical equipment.

• Be able to quickly respond to hazards or emergencies that occur during installation and
commissioning.

• Be familiar with local standards and relevant safety regulations of electrical systems.

• Read this manual thoroughly and understand the safety instructions related to
operations.

How to Use This Manual

Please read this manual carefully before using the product and keep it properly at a place
for easy access.
All contents, pictures, marks, and symbols in this manual are owned by SUNGROW. No part
of this document may be reprinted by the non-internal staff of SUNGROW without written
authorization.

II

Contents of this manual may be periodically updated or revised, and the actual product pur­chased shall prevail. Users can obtain the latest manual from

support.sungrowpower.com

or sales channels.

Symbols

This manual contains important safety instructions, which are highlighted with the following
symbols, to ensure personal and property safety during usage, or to help optimize the prod­uct performance in an efficient way.
Please carefully understand the meaning of these warning symbols to better use the manual.

Indicates high-risk potential hazards that, if not avoided, may lead to death or seri-

ous injury.

Indicates moderate-risk potential hazards that, if not avoided, may lead to death or

serious injury.

Indicates low-risk potential hazards that, if not avoided, may lead to minor or mod-

erate injury.

Indicates potential risks that, if not avoided, may lead to device malfunctions or fi-

nancial losses.

“NOTE” indicates additional information, emphasized contents or tips that may be
helpful, e.g., to help you solve problems or save time.

III

Contents

All Rights Reserved .....................................................................................................I

About This Manual ......................................................................................................II

1 Safety .................................................................................................................1

1.1 Unpacking and Inspection ...............................................................................1

1.2 Installation Safety ...........................................................................................1

1.3 Electrical Connection Safety............................................................................2

1.4 Operation Safety ............................................................................................3

1.5 Maintenance Safety ........................................................................................4

1.6 Disposal Safety ..............................................................................................4

2 Product Description ..........................................................................................5

2.1 System Introduction ........................................................................................5

2.2 Product Introduction........................................................................................6

2.3 Symbols on the Product ..................................................................................8

2.4 LED Panel .....................................................................................................9

2.5 Circuit Diagram ............................................................................................ 10

2.6 Function Description ..................................................................................... 11

3 Unpacking and Storage ................................................................................. 14

3.1 Unpacking and Inspection ............................................................................. 14

3.2 Inverter Storage ...........................................................................................14

4 Mechanical Mounting .....................................................................................16

4.1 Safety during Mounting .................................................................................16

4.2 Location Requirements .................................................................................16

4.2.1 Environment Requirements..................................................................17

4.2.2 Carrier Requirements .......................................................................... 17

4.2.3 Angle Requirements............................................................................17

4.2.4 Clearance Requirements .....................................................................18

4.3 Installation Tools........................................................................................... 18

4.4 Moving the Inverter.......................................................................................20

4.5 Installing the Inverter.....................................................................................20

5 Electrical Connection .....................................................................................23

5.1 Safety Instructions ........................................................................................ 23

V

5.2 Terminal Description .....................................................................................24

5.3 Electrical Connection Overview .....................................................................25

5.4 External Grounding Connection..................................................................... 26

5.4.1 External Grounding Requirements........................................................27

5.4.2 Connection Procedure.........................................................................27

5.5 AC Cable Connection ...................................................................................28

5.5.1 AC Side Requirements ........................................................................28

5.5.2 Assembling the AC Connector ............................................................. 29

5.5.3 Installing the AC Connector..................................................................31

5.6 DC Cable Connection ...................................................................................32

5.6.1 PV Input Configuration ........................................................................ 32

5.6.2 Assembling the PV Connectors ............................................................ 33

5.6.3 Installing the PV Connectors ................................................................34

5.7 WiNet-S Connection ..................................................................................... 35

5.7.1 Ethernet Communication ..................................................................... 36

5.7.2 WLAN Communication ........................................................................ 38

5.8 Smart Meter Connection ...............................................................................38

5.9 DRM Connection .......................................................................................... 40

6 Commissioning ............................................................................................... 44

6.1 Inspection before Commissioning ..................................................................44

6.2 Powering on the System ...............................................................................44

6.3 App Preparation ...........................................................................................44

6.4 Creating a Plant............................................................................................45

6.5 Initializing the Device ....................................................................................47

6.6 Configuring the Plant ....................................................................................51

7 iSolarCloud App ..............................................................................................55

7.1 Brief Introduction ..........................................................................................55

7.2 Installing the App..........................................................................................55

7.3 Account Registration..................................................................................... 56

7.4 Login ........................................................................................................... 57

7.4.1 Requirements .....................................................................................57

7.4.2 Login Procedure .................................................................................57

7.5 Initial Settings...............................................................................................59

7.6 Function Overview........................................................................................60

7.7 Home ..........................................................................................................61

7.8 Run Information............................................................................................62

7.9 Records .......................................................................................................63

VI

7.10 More..........................................................................................................66

7.10.1 System Parameters ........................................................................... 67

7.10.2 Operation Parameters ....................................................................... 67

7.10.3 Power Regulation Parameters............................................................ 68

7.10.4 Communication Parameters...............................................................73

7.10.5 Firmware Update ..............................................................................74

7.10.6 Auto-test...........................................................................................75

8 System Decommissioning ............................................................................ 77

8.1 Disconnecting the Inverter.............................................................................77

8.2 Dismantling the Inverter ................................................................................77

8.3 Disposal of the Inverter .................................................................................78

9 Troubleshooting and Maintenance ..............................................................79

9.1 Troubleshooting ...........................................................................................79

9.2 Maintenance ................................................................................................88

9.2.1 Maintenance Notices...........................................................................88

9.2.2 Routine Maintenance .......................................................................... 89

10 Appendix .......................................................................................................90

10.1 Technical Data............................................................................................ 90

10.2 Quality Assurance ...................................................................................... 95

10.3 Contact Information ....................................................................................96

VII

1

Safety

When installing, commissioning, operating, and maintaining the product, strictly observe the
labels on the product and the safety requirements in the manual. Incorrect operation or work
may cause:

• Injury or death to the operator or a third party;

• Damage to the product and other properties.

• The safety instructions in this manual are only supplements and cannot cover
all the precautions that should be followed. Perform operations considering ac­tual on-site conditions.

• SUNGROW shall not be held liable for any damage caused by violation of gen­eral safety operation requirements, general safety standards, or any safety in­struction in this manual.

• When installing, operating, and maintaining the product, comply with local laws
and regulations. The safety precautions in this manual are only supplements
to local laws and regulations.

1.1 Unpacking and Inspection

Check all safety signs, warning labels and nameplates on devices.

Ensure that the safety signs, warning labels and nameplates must be clearly visible

and cannot be removed or covered before the device is decommissioned.

After receiving the product, check whether the appearance and structural parts of

the device are damaged, and check whether the packing list is consistent with the

actual ordered product. If there are problems with the above inspection items, do

not install the device and contact SUNGROW in time.

1.2 Installation Safety

Make sure there is no electrical connection before installation.

Before drilling, avoid the water and electricity wiring in the wall.

1

1 Safety User Manual

Improper installation may cause personal injury!

• If the product supports hoisting transport and is hoisted by hoisting tools, no
one is allowed to stay under the product.

• When moving the product, be aware of the product weight and keep the balance
to prevent it from tilting or falling.

Before operating the product, must check and ensure that tools to be used have

been maintained regularly.

1.3 Electrical Connection Safety

Before electrical connections, please make sure that the inverter is not damaged,

otherwise it may cause danger!

Before electrical connections, please make sure that the inverter switch and all

switches connected to the inverter are set to "OFF", otherwise electric shock may

occur!

The PV string will generate lethal high voltage when exposed to sunlight.

• Operators must wear proper personal protective equipment during electrical
connections.

• Must ensure that cables are voltage-free with a measuring instrument before
touching DC cables.

• Respect all safety instructions listed in relevant documents about PV strings.

Danger to life due to a high voltage inside the inverter!

• Be sure to use special insulation tools during cable connections.

• Note and observe the warning labels on the product, and perform operations
strictly following the safety instructions.

• Respect all safety instructions listed in this manual and other pertinent
documents.

2

User Manual 1 Safety

Damage to the product caused by incorrect wiring is not covered by the warranty.

• Electrical connection must be performed by professionals.

• All cables used in the PV generation system must be firmly attached, properly
insulated, and adequately dimensioned.

Check the positive and negative polarity of the PV strings, and connect the PV con-

nectors to corresponding terminals only after ensuring polarity correctness.

During the installation and operation of the inverter, please ensure that the positive

or negative poles of PV strings do not short-circuit to the ground. Otherwise, an

AC or DC short-circuit may occur, resulting in equipment damage. The damage

caused by this is not covered by the warranty.

Comply with the safety instructions related to PV strings and the regulations re-

lated to the local grid.

1.4 Operation Safety

• When the inverter is running, do not touch its enclosure.

• When the inverter is running, it is strictly forbidden to plug and unplug any con­nector on the inverter.

• When the inverter is running, do not touch any wiring terminal of the inverter.
Otherwise, electric shock may occur.

• When the inverter is running, do not disassemble any parts of the inverter. Oth­erwise, electric shock may occur.

• When the inverter is running, it is strictly forbidden to touch any hot parts of the
inverter (such as the heat sink). Otherwise, it may cause burns.

• If the inverter is equipped with a DC switch, do not operate it when the inverter
is running. Otherwise, device damage or personal injury may occur.

3

1 Safety User Manual

1.5 Maintenance Safety

Risk of inverter damage or personal injury due to incorrect service!

• Before any service work, first disconnect the grid-side AC circuit breaker and
check the inverter status. If the inverter indicator is off, please wait until night to
disconnect the DC switch. If the inverter indicator is on, directly disconnect the
DC switch.

• After the inverter is powered off for 10 minutes, measure the voltage and cur­rent with professional instrument. Only when there is no voltage nor current
can operators who wear protective equipment operate and maintain the inverter.

• Even if the inverter is shut down, it may still be hot and cause burns. Wear pro­tective gloves before operating the inverter after it cools down.

Touching the power grid or the contact points and terminals on the inverter con-

nected to the power grid may lead to electric shock!

• The power grid side may generate voltage. Always use a standard voltmeter to
ensure that there is no voltage before touching.

To prevent misuse or accidents caused by unrelated personnel: Post prominent

warning signs or demarcate safety warning areas around the inverter to prevent

accidents caused by misuse.

To avoid the risk of electric shock, do not perform any other maintenance opera-

tions beyond this manual. If necessary, contact SUNGROW for maintenance. Oth-

erwise, the losses caused is not covered by the warranty.

1.6 Disposal Safety

Please scrap the inverter in accordance with relevant local regulations and stand-

ards to avoid property losses or casualties.

4

2

Product Description

2.1 System Introduction

The inverter is a transformerless 1-phase PV grid-connected inverter. As an integral compo­nent in the PV power system, the inverter is designed to convert the direct current power
generated from the PV modules into grid-compatible AC current and feeds the AC current to
the utility grid.

• The inverter must only be operated with PV strings with class II protection in ac­cordance with IEC 61730, application class A. It is not allowed for the positive
pole or the negative pole of the PV strings to be grounded. This can cause dam­age to the inverter.

• Do not connect any local load between the inverter and the AC circuit breaker.

The inverter applies only to the scenarios described in this manual.

The intended usage of the inverter is illustrated in the following figure.

figure 2-1 Inverter Application in PV Power System

Item

A

B Inverter

C

Description

PV strings

Metering device Meter cupboard with power distribution system.

Note

Compatible with monocrystalline silicon, polycrystalline silicon,
and thin-film modules without grounding.

SG2.0RS-S, SG2.5RS-S, SG3.0RS-S, SG3.0RS, SG3.6RS,
SG4.0RS, SG5.0RS, SG6.0RS.

5

2 Product Description User Manual

Item

D

E Loads

The following figure shows the common grid configurations.

Description

Utility grid

Note

TT，TN-C，TN-S, TN-C-S.

House loads that consume electricity.

2.2 Product Introduction

Model Description

The model description is as follows (take SG3.0RS-S as an example):

Appearance

The following figure shows the dimensions of the inverter. The image shown here is for refer­ence only. The actual product received may differ.

6

User Manual 2 Product Description

figure 2-2 Inverter Appearance

No. Name

1 Label

Hanger

2

LED pannel

3

Description

Information about COM2 pin definition, supported DRM
modes, etc.

Complement to the included wall mounting bracket for hang­ing the inverter.

The LED screen indicates the running information and the
LED indicator indicates the working state of the inverter.

To clearly identify the product, including device model, S/N,

4

Nameplate

important specifications, marks of certification institutions,
etc.

Electrical connec-

5

tion area

6 DC switch

DC terminals (SG6.0RS for example), AC terminal, addition­al grounding terminal and communication terminals.

To safely disconnect the DC circuit whenever necessary.

Dimensions

The following figure shows the dimensions of the inverter.

7

2 Product Description User Manual

figure 2-3 Dimensions of the Inverter

Inverter Model W (mm) H (mm) D (mm)

SG2.0RS-S, SG2.5RS-S, SG3.0RS-S 320 225 120

SG3.0RS, SG3.6RS, SG4.0RS,
SG5.0RS, SG6.0RS

2.3 Symbols on the Product

Symbol Explanation

Parameters on the DC side.

Parameters on the AC on-grid side.

Regulatory compliance mark.

TÜV mark of conformity.

CE mark of conformity.

EU/EEA Importer.

UKCA mark of conformity.

Do not dispose of the inverter together with household waste.

410 270 150

The inverter does not have a transformer.

Disconnect the inverter from all the external power sources be­fore maintenance!

8

User Manual 2 Product Description

Symbol Explanation

Read the user manual before maintenance!

Burn danger due to the hot surface that may exceed 60℃.

Danger to life due to high voltages!

Do not touch live parts for 10 minutes after disconnection from
the power sources.

Only qualified personnel can open and maintain the inverter.

Additional grounding point.

* The table shown here is for reference only. The actual product received may differ.

2.4 LED Panel

The LED panel with a display screen and an indicator is on the front of the inverter.

figure 2-4 LED Panel

(a) Normal state (b) Error state

No. Name

E-day Today’s energy yield.

1

2 Pac

Description

Current AC power.

To indicate the working state of the inverter.

LED

3

indicator

Touch it to switch the information in normal state or view multiple er­ror codes in error state.

4 Error code

The error code in the figure is just an example.

• In normal state, the E-day and Pac information will be displayed alternately. Also you can
touch the LED indicator to switch the information.

• In error state, touch the LED indicator to view multiple error codes.

• If there is no operation for 5 minutes, the display screen will be off. Touch the LED indica­tor to activate it.

9

2 Product Description User Manual

table 2-1 State description of the LED indicator

LED color State Definition

On

The inverter is operating normally.

Blue

Red

Gray

Voltage may still be present in AC side circuits after the indicator is off. Pay atten-

tion to the electricity safety during operating.

2.5 Circuit Diagram

Flashing

On

Off

The inverter is at standby or startup state (not
feeding power into the grid).

A system fault has occured.

Both the AC and DC sides are powered down.

10

The following figure shows the main circuit of the inverter.

figure 2-5 Circuit Diagram (SG6.0RS for example)

• DC switches can safely disconnect the PV input when necessary to ensure the safe op­eration of the inverter and the safety of personnel.

• The DC SPD provides a discharge circuit for the DC side over-voltage power to prevent
it from damaging the internal circuits of the inverter.

• EMI filters can filter out the electromagnetic interference inside the inverter to ensure that
the inverter meets the requirements of electromagnetic compatibility standards.

User Manual 2 Product Description

• The MPPT is utilized for DC input to ensure the maximum power from the PV array at dif­ferent PV input conditions.

• The inverter circuit converts the DC power into grid-compliant AC power and feeds it into
the grid.

• The AC filter filters the output AC component of high frequency to ensure that the output
current meets the grid requirements.

• The AC relay isolates the AC output of the inverter from the grid, making the inverter safe
from the grid in case of inverter failure or grid failure.

• The AC SPD provides a discharge circuit for the AC side over-voltage power to prevent it
from damaging the internal circuits of the inverter.

2.6 Function Description

Basic Function

• Conversion function

The inverter converts the DC power from the PV array to the AC power, in conformity with
the grid requirements.

• Data storage

The inverter logs running information, error records, etc.

• Parameter configuration

The inverter provides various parameter configurations for optimal operation. Parame­ters can be set via the iSolarCloud App or the cloud server. For further configurations,
which exceeds the usual parameters configuration, please contact Sungrow.

• Communication interface

The inverter is equipped with two communication interfaces. The communication device
can be connected to the inverter via both interfaces.

After communication connection is established, users can view inverter information, op­erational data and can set inverter parameters through the iSolarCloud.

It is recommended to use the communication module from SUNGROW. Using
a device from other companies may lead to communication failure or other un­expected damage.

• Protection Function

Several protective functions are integrated in the inverter, including short circuit protec­tion, grounding insulation resistance monitoring, residual current protection, grid monitor­ing, DC overvoltage/overcurrent protection, etc.

11

2 Product Description User Manual

DRM ("AU"/"NZ")

The DRM function is only applicable to a single inverter.
The inverter provides terminals for connecting to a Demand Response Enabling Device
(DRED). After the connection, the DRED asserts demand response modes (DRMs). The in­verter detects and initiates a response to all supported demand response modes listed in
the following table.

table 2-2 Demand Response Mode Explanation

Mode Explanation

DRM0 The inverter is in the state of shutdown.

Feed-in Limitation

Set the feed-in limitation value via iSolarCloud App. When the smart energy meter detects
that the export power is greater than the limit value, the inverter will reduce the output power
within the specified range.

PID Recovery

The inverter is equipped with PID phenomenon recovery function to improve the PV power
generation. During the power generation process, the inverter could carry out a main Anti­PID function without any influence to the grid side thanks to a particular technology.
The PID recovery function is disabled by default. Enable the function via iSolarCloud App
when there is PV power in the daytime. During the inverter standby process with no irradi­ance, an additional PID recovery function could apply inverse voltage to PV modules, to re­store the degraded modules.

12

figure 2-6 PID Recovery Scheme

Keep the DC switch "ON" in the PID recovery process. During the process, there is

voltage hazard between inverter / PV module live conductors and ground. Do not

touch any of them.

When the PID recovery function is enabled, there will be a power consumption of
less than 30 W in the PID recovery process.

User Manual 2 Product Description

AFCI Function(Optional)

• AFCI activation

This function can be enabled to detect whether arc occurs in the DC circuit of the inverter.

• AFCI self-test

This function is intended to detect whether the AFCI function of the inverter is normal.

The arc detection function meets the standard requirements, please test under
the working conditions as required by the standard.

Auto-test (for Italy CEI0-21 Grid Code Only)

The Italy CEI0-21 grid code requires auto-test for the inverter before grid connection. During
the auto-test, the inverter checks the protection threshold and protection time of the 1-level
overvoltage (59.S1), 2-level overvoltage (59.S2),1-level undervoltage (27.S1), 2-level under­voltage (27. S2),1-level overfrequency (81>. S1), 2-level overfrequency (81>. S2), 1-level
underfrequency (81<.S1), 2-level underfrequency (81<.S2) to ensure that the inverter could
meet the requirements of CEI0-21 to protect the grid from abnormality after the inverter is
operational.

13

3

Unpacking and Storage

3.1 Unpacking and Inspection

The product is thoroughly tested and strictly inspected before delivery. Nonetheless, dam­age may still occur during shipping. For this reason, please conduct a thorough inspection
after receiving the product.

• Check the packing case for any visible damage.

• Check the scope of delivery for completeness according to the packing list.

• Check the inner contents for damage after unpacking.

Contact SUNGROW or the transport company in case of any damage or incompleteness,
and provide photos to facilitate services.
Do not dispose of the original packing case. It is recommended to store the device in the
original packing case when the product is decommissioned.

After receiving the product, check whether the appearance and structural parts of

the product are damaged, and check whether the packing list is consistent with the

actual ordered product. If there are problems with the above inspection items, do

not install the device and contact SUNGROW in time.

If any tool is used for unpacking, be careful not to damage the inverter.

3.2 Inverter Storage

Proper storage is required if the inverter is not installed immediately.

• Store the inverter in the original packing case with the desiccant inside.

• The storage temperature must be always between -30℃ and +70℃, and the storage rel­ative humidity must be always between 0 and 95 %, non-condensing.

• In case of stacking storage, the number of stacking layers should never exceed the limit
marked on the outer side of the packing case.

• The packing case should be upright.

• If the inverter needs to be transported again, pack it strictly before loading and transport­ing it.

• Do not store the inverter in places susceptible to direct sunlight, rain, and strong electric
field.

14

User Manual 3 Unpacking and Storage

• Do not place the inverter in places with items that may affect or damage the inverter.

• Store the inverter in a clean and dry place to prevent dust and water vapor from eroding.

• Do not store the inverter in places with corrosive substances or susceptible to rodents
and insects.

• Carry out periodic inspections. Inspection shall be conducted at least once every six
months. If any insect or rodent bites are found, replace the packaging materials in time.

• If the inverter has been stored for more than a year, inspection and testing by professio­nals are required before it can be put into operation.

Please store the inverter according to the storage requirements. Product damage

caused by failure to meet the storage requirements is not covered by the warranty.

15

4

Mechanical Mounting

Respect all local standards and requirements during mechanical installation.

4.1 Safety during Mounting

Make sure there is no electrical connection before installation.

Before drilling, avoid the water and electricity wiring in the wall.

Poor installation environment will affect system performance!

• Install the inverter in a well-ventilated place.

• Ensure that the heat dissipation system or vent is not blocked.

• Do not install the inverter in an environment with flammable and explosive ob­jects or smoke.

Improper handling may cause personal injury!

• When moving the inverter, be aware of its weight and keep the balance to pre­vent it from tilting or falling.

• Wear proper protective equipment before performing operations on the inverter.

• The bottom terminals and interfaces of the inverter cannot directly contact the
ground or other supports. The inverter cannot be directly placed on the ground.

4.2 Location Requirements

Select an optimal mounting location for safe operation, long service life and expected
performance.

• The inverter with protection rating IP65 can be installed both indoors and outdoors.

• Install the inverter at a place convenient for electrical connection, operation, and
maintenance.

16

User Manual 4 Mechanical Mounting

4.2.1 Environment Requirements

• The installation environment must be free of inflammable or explosive materials.

• The location should be not accessible to children.

• The ambient temperature and relative humidity must meet the following requirements.

• Inverters free from direct sunlight, direct rain and snow have longer service life. Consider
sheltered places as the installation location.

• The inverter should be well ventilated. Ensure air circulation.

4.2.2 Carrier Requirements

The concrete wall should be capable of withstanding a force of four times the weight of the
inverter and be suitable for the dimensions of the inverter.
The installation carrier should meet the following requirements:

4.2.3 Angle Requirements

Install the inverter vertically. Never install the inverter horizontally, or at forward/backward
tilted, side tilted, or upside down.

17

4 Mechanical Mounting User Manual

4.2.4 Clearance Requirements

Reserve enough clearance around the inverter to ensure sufficient space for heat
dissipation.

Install the inverter at an appropriate height for ease of viewing the screen and LED indicator
and operating switch(es).

4.3 Installation Tools

Installation tools include but are not limited to the following recommended ones. If necessary,
use other auxiliary tools on site.

18

User Manual 4 Mechanical Mounting

table 4-1 Tool specification

Goggles Earplugs Dust mask Protective gloves

Insulated shoes Utility knife Marker Wrist strap

Wire cutter Wire stripper Hydraulic plier RJ45 crimping tool

MC4 terminal

crimping tool (4

mm2–6 mm2)

Phillips screwdriver

Tube terminal

crimping tool (0.5

2

–1.0 mm2)

mm

Vacuum cleaner Measuring tape Heat shrink tubing

Electric screwdriver

(M4, M6)

Slotted screwdriver

(M2)

(M4)

19

4 Mechanical Mounting User Manual

Heat gun Wrench (33 mm, 35

Rubber mallet Hammer drill (φ10)

4.4 Moving the Inverter

Before installation, remove the inverter from the packing case and move it to the installation
site. Follow the instructions below as you move the inverter:

• Always be aware of the weight of the inverter.

• Lift the inverter using the handles positioned on both sides of the inverter.

• Move the inverter by one or two people or by using a proper transport tool.

• Do not release the equipment unless it has been firmly secured.

mm)

MC4 terminal

wrench

Multimeter (≥ 600

Vdc)

Improper handling may cause personal injury!

• Arrange an appropriate number of personnel to carry the inverter according to
its weight, and installation personnel should wear protective equipment such
as anti-impact shoes and gloves.

• Attention must be paid to the center of gravity of the inverter to avoid tilting dur­ing handling.

• Placing the inverter directly on a hard ground may cause damage to its metal
enclosure. Protective materials such as sponge pad or foam cushion should be
placed underneath the inverter.

• Move the inverter by holding the handles on it. Do not move the inverter by
holding the terminals.

4.5 Installing the Inverter

Inverter is installed on the wall by means of wall-mounting bracket and the expansion plug
sets.
The expansion plug set shown below is recommended for the installation.

20

User Manual 4 Mechanical Mounting

(1) Self-tapping

(2) Expansion tube (3) Fender washer (4) Spring washer

screw M6

step 1 Place the wall-mounting bracket to a proper position on the wall. Mark the positions and drill

the holes.

Observe the level on the bracket and adjust until the bubble is in the middle

position.

The depth of the holes should be about 70 mm.

* The image shown here is for reference only. The actual product received may differ.

Inverter Model L1 (mm) L2 (mm) H (mm)

SG2.0RS-S, SG2.5RS-S, SG3.0RS-S 260 225 40

SG3.0RS, SG3.6RS, SG4.0RS,
SG5.0RS, SG6.0RS

347 312 40

step 2 Place the expansion tubes into the holes. Then secure the wall-mounting bracket to the wall

firmly with the expansion bolt sets.

21

4 Mechanical Mounting User Manual

step 3 Lift the inverter and slide it down along the wall-mounting bracket to make sure they match

perfectly. Use two screw sets to lock both left and right sides.

22

- - End

5

Electrical Connection

5.1 Safety Instructions

The PV string will generate lethal high voltage when exposed to sunlight.

• Operators must wear proper personal protective equipment during electrical
connections.

• Must ensure that cables are voltage-free with a measuring instrument before
touching DC cables.

• Respect all safety instructions listed in relevant documents about PV strings.

• Before electrical connections, please make sure that the inverter switch and all
switches connected to the inverter are set to "OFF", otherwise electric shock
may occur!

• Ensure that the inverter is undamaged and all cables are voltage free before
performing electrical work.

• Do not close the AC circuit breaker until the electrical connection is complete.

Damage to the product caused by incorrect wiring is not covered by the warranty.

• Electrical connection must be performed by professionals.

• Operators must wear proper personal protective equipment during electrical
connections.

• All cables used in the PV generation system must be firmly attached, properly
insulated, and adequately dimensioned.

All electrical connections must comply with local and national / regional electrical

standards.

• Cables used by the user shall comply with the requirements of local laws and
regulations.

• Only with the permission of the national / regional grid department, the inverter
can be connected to the grid.

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5 Electrical Connection User Manual

All vacant terminals must be covered with waterproof covers to prevent affecting

the protection rating.

When the wiring is completed, seal the gap of cable inlet and outlet holes with fire-

proof / waterproof materials such as fireproof mud to prevent foreign matter or

moisture from entering and affecting the long-term normal operation of the inverter.

Comply with the safety instructions related to PV strings and the regulations re-

lated to the utility grid.

The cable colors in figures in this manual are for reference only. Please select ca­bles according to local cable standards.

5.2 Terminal Description

All electrical terminals are located at the bottom side of the inverter.

24

figure 5-1 Terminals (SG3.0RS for example)

* The image shown here is for reference only. The actual product received may differ.

table 5-1 Terminal Description

Decisive Volt-

No. Name

Description

age

Classification

MC4 terminals for PV input.

PV1+, PV1–, PV2+,

1

PV2–

The terminal number depends on in-

DVC-C

verter model.
Communication accessory port to be

2 COM1

connected to WiNet-S communica-

DVC-A

tion module.

User Manual 5 Electrical Connection

Decisive Volt-

No. Name

Description

age

Classification

Communication connection for

3 COM2

RS485, DRM and smart energy

DVC-A

meter.

4 GRID

AC terminal to connect to the grid.

DVC-C

5

Additional grounding terminal. Not applicable

The pin definition of COM2 terminal is shown in the following label.

figure 5-2 Label of COM2 Terminal

table 5-2 Label Description of COM2 Terminal

Label

RS485

Meter

DRM

RSD

A1, B1

A2, B2

R, C

RSD-1, RSD-2

Description

Reserved
For the smart energy meter

For external Demand Response Enabling Device
("AU"/"NZ")

Reserved

5.3 Electrical Connection Overview

The electrical connection should be realized as follows:

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5 Electrical Connection User Manual

(A) PV string (B) Inverter (C) Loads

(D) Grid (E) Smart energy meter (optional)

(F) AC circuit breaker (G) External device

table 5-3 Cable Requirements

No. Cable

Type

Cable Diameter

Wire Conductor

Cross-section

Single or multi-core

1 DC cable

copper wire comply­ing with 600 V and

6 mm–9 mm 4 mm

2

–6 mm

2

20 A standard

2 Ethernet cable CAT 5E outdoor

shielded network
cable

3 Meter RS485 ca-

(1)

ble

4

AC cable

(2)

Additional

5

Grounding cable

Shielded twisted pair

Outdoor 3-core cop­per wire cable

Outdoor single-core
copper wire cable

4.8 mm–6 mm

4.8 mm–6 mm

10 mm–21 mm 4 mm

4 mm –8 mm 4 mm

8 * (0.08–0.2)

2

mm

2 * (0.5–1.0) mm

2

2

–6 mm

2

2

–6 mm

2

(1) The cable requirements for COM2 terminal connection are the same.
(2) All the AC wires should be equipped with correctly colored cables for distinguishing.
Please refer to related standards about the wiring color.

It is recommended to use heavy duty conduits when run cables through Cavity
walls, or lay out cables with corresponding conduits. (For “AU” and “NZ”)

5.4 External Grounding Connection

Electric shock!

• Make sure that the ground cable is connected reliably. Otherwise, it may cause
electric shock.

26

User Manual 5 Electrical Connection

• Since the inverter is not equipped with a transformer, neither the negative elec­trode nor the positive electrode of the PV string can be grounded. Otherwise,
the inverter will not operate normally.

• Connect the grounding terminal to the protective grounding point before AC ca­ble connection, PV string connection, and communication cable connection.

• The ground connection of this additional grounding terminal cannot replace the
connection of the PE terminal of the AC cable. Make sure those terminals are
both grounded reliably. SUNGROW shall not be held liable for any damage
caused by the violation.

5.4.1 External Grounding Requirements

All non-current carrying metal parts and device enclosures in the PV power system should
be grounded, for example, brackets of PV modules and inverter enclosure.
When there is only one inverter in the PV system, connect the external grounding cable to a
nearby grounding point.
When there are multiple inverters in the PV system, connect grounding points of all inverters
and the PV array frames to the equipotential cable (according to the onsite conditions) to im­plement an equipotential connection.

5.4.2 Connection Procedure

Additional grounding cable and OT/DT terminal are prepared by customers.

step 1 Prepare the cable and OT/DT terminal.

(1) Heat shrink tubing (2) OT/DT terminal

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5 Electrical Connection User Manual

step 2 Remove the screw on the grounding terminal and fasten the cable with a screwdriver.

step 3 Apply paint to the grounding terminal to ensure corrosion resistance.

- - End

5.5 AC Cable Connection

5.5.1 AC Side Requirements

Only with the permission of the local grid department, the inverter can be con­nected to the grid.

Before connecting the inverter to the grid, ensure the grid voltage and frequency comply with
requirements, for which, refer to "Technical Date". Otherwise, contact the electric power
company for help.

AC Circuit Breaker

An independent two-pole circuit breaker must be installed on the output side of the inverter
to ensure safe disconnection from the grid. The recommended specifications are as follows.

Inverter Model

SG2.0RS-S/SG2.5RS-S/SG3.0RS-S 25 A
SG3.0RS/SG3.6RS/SG4.0RS/SG5.0RS 32 A
SG6.0RS 40 A

Recommended Specification

28

User Manual 5 Electrical Connection

AC circuit breakers should be installed on the output side of the inverter and the

grid side to ensure safe disconnection from the grid.

• Determine whether an AC circuit breaker with greater overcurrent capacity is re­quired based on actual conditions.

• Do not connect any local load between the inverter and the AC circuit breaker.

• Multiple inverters cannot share one AC circuit breaker.

Residual Current Monitoring Device

With an integrated universal current-sensitive residual current monitoring unit included, the
inverter will disconnect immediately from the mains power once a fault current with a value
exceeding the limit is detected.
However if an external residual current device (RCD) (type A is recommended) is mandatory,
the switch must be triggered at a residual current of 300 mA (recommended). RCD of other
specifications can also be used according to local standard.
In Australia, a RCD is not required according to the local standard AS3000-2018 when either
of the following installation methods is adopted if the PV array capacitance to ground is large
(such as a tin roof):

• Use heavy duty conduits（such as metal bushing） when run PV and AC cables through
Cavity walls.

• Route the PV and AC cables through pipes (PVC or metal tubing), lay the cables and in­stall them.

5.5.2 Assembling the AC Connector

step 1 Unscrew the swivel nut of the AC connector.

step 2 Thread the AC cable of appropriate length through the swivel nut, the sealing ring and the

housing.

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5 Electrical Connection User Manual

step 3 Remove the cable jacket by less than 45 mm, and strip the wire insulation by 12 mm–16 mm.

step 4 Open the clamp on the spring-loaded terminal and fully insert the wires into the correspond-

ing holes. Then close the clamp and push the terminal plug into the housing until there is an
audible click.

Observe the plug assignment.

• Do not connect the L line to the "PE" terminal or the PE wire to the "N" terminal.
Otherwise, unrecoverable damage to the inverter may follow.

• Do not connect the L line and the N line in reverse, otherwise the inverter may
not operate normally.

30

User Manual 5 Electrical Connection

step 5 Ensure that the wires are securely in place by slightly pulling them. Tighten the swivel nut to

the housing.

- - End

5.5.3 Installing the AC Connector

High voltage may be present in inverter!

Ensure all cables are voltage-free before electrical connection.

Do not connect the AC circuit breaker until all inverter electrical connections are

completed.

step 1 Disconnect the AC circuit breaker and secure it against reconnection.

step 2 Lift the locking part upwards and insert the AC connector into the GRID terminal on the bot-

tom side of the inverter. Then press the locking part and lock it with the screw.

step 3 Connect the PE wire to ground and the phase lines and the “N” line to AC circuit breaker.

Then Connect the AC circuit breaker to electric board.

step 4 Make sure all wires are firmly installed via the right torque tool or dragging the cables slightly.

- - End

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5 Electrical Connection User Manual

5.6 DC Cable Connection

The PV string will generate lethal high voltage when exposed to sunlight.

Respect all safety instructions listed in relevant documents about PV strings.

• Make sure the PV array is well insulated to ground before connecting it to the
inverter.

• Make sure the maximum DC voltage and the maximum short circuit current of
any string never exceed inverter permitted values specified in "Technical Data".

• Check the positive and negative polarity of the PV strings, and connect the PV
connectors to corresponding terminals only after ensuring polarity correctness.

• During the installation and operation of the inverter, please ensure that the posi­tive or negative electrodes of PV strings do not short-circuit to the ground. Oth­erwise, an AC or DC short-circuit may occur, resulting in equipment damage.
The damage caused by this is not covered by the warranty.

• Electric arc or contactor over-temperature may occur if the PV connectors are
not firmly in place, and SUNGROW shall not be held liable for any damage
caused.

• If the DC input cables are reversely connected and the DC switch has been ro­tated to "ON", do not operate immediately. Otherwise, the inverter may be dam­aged. Please turn the DC switch to "OFF" and remove the DC connector to
adjust the polarity of the strings when the string current is lower than 0.5A.

The following requirements about PV string connection must be met. Otherwise, it

may cause irreversible damage to the inverter, which is not covered by the

warranty.

• Mixed use of different brand or model of PV modules in one MPPT circuit, or PV
modules of different orientation or angles in a string may not damage inverter
but will cause system bad performance!

• The inverter enters standby state when the input voltage ranges between 560 V
and 600 V. The inverter returns to running state once the voltage returns to the
MPPT operating voltage range, namely, 40 V to 560 V.

5.6.1 PV Input Configuration

• The inverters SG2.0RS-S / SG2.5RS-S / SG3.0RS-S have one PV input with one MPP
tracker.

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User Manual 5 Electrical Connection

• The inverters SG3.0RS / SG3.6RS / SG4.0RS / SG5.0RS / SG6.0RS have two PV in­puts, each with independent MPP tracker. Each DC input area can operate
independently.

• The PV strings to the same DC input area should have the same type, the same number
of PV panels, identical tilt and identical orientation for maximum power.

• The PV strings to two DC input areas may differ from each other, including PV module
type, number of PV modules in each string, angle of tilt, and installation orientation.

figure 5-3 PV Input Configuration (SG6.0RS for example)

Prior to connecting the inverter to PV inputs, the specifications in the following table should
be met:

Inverter Model

All models

Open-circuit Voltage Limit Max. current for input connector

600 V 20 A

5.6.2 Assembling the PV Connectors

High voltage may be present in the inverter!

• Ensure all cables are voltage-free before performing electrical operations.

• Do not connect the DC switch and AC circuit breaker before finishing electrical
connection.

To ensure IP65 protection, use only the supplied connector.

step 1 Strip the insulation from each DC cable by 7 mm–8 mm.

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5 Electrical Connection User Manual

step 2 Assemble the cable ends with the crimping pliers.

1: Positive crimp contact 2: Negative crimp contact

step 3 Lead the cable through cable gland, and insert the crimp contact into the insulator until it

snaps into place. Gently pull the cable backward to ensure firm connection. Tighten the ca­ble gland and the insulator (torque 2.5 N.m to 3 N.m).

step 4 Check for polarity correctness.

If the PV polarity is reversed, the inverter will be in a fault or alarm state and will

not operate normally.

- - End

5.6.3 Installing the PV Connectors

step 1 Rotate the DC switch to "OFF" position.

34

User Manual 5 Electrical Connection

step 2 Check the cable connection of the PV string for polarity correctness and ensure that the

open circuit voltage in any case does not exceed the inverter input limit of 600 V.

step 3 Connect the PV connectors to corresponding terminals until there is an audible click.

step 4 Seal the unused PV terminals with the terminal caps.

- - End

5.7 WiNet-S Connection

The WiNet-S module supports Ethernet communication and WLAN communication. It is not
recommended to use both communication methods at the same time.

35

5 Electrical Connection User Manual

For details, see the quick guide for the WiNet-S module. Scan the following QR code for the
quick guide.

5.7.1 Ethernet Communication

step 1 (Optional) Strip the insulation layer of the communication cable with an Ethernet wire strip-

per, and lead the corresponding signal cables out. Insert the stripped communication cable
into the RJ45 plug in the correct order, and crimp it with a crimper.

1: RJ45 plug 2：Protective cap

Skip this step if a standard network cable with RJ45 plug is prepared.

step 2 Unscrew the swivel nut from the communication module and take out the inner sealing ring.

step 3 Unscrew the housing from the communication module.

36

User Manual 5 Electrical Connection

step 4 Thread the network cable through the swivel nut and gasket. Afterwards, route the cable into

the opening of the sealing. Finally, insert the cable through the housing.

step 5 Insert the RJ45 plug into the front plug connector until there is an audible click and tighten

the housing. Install the gasket and fasten the swivel nut.

step 6 Remove the waterproof lid from the COM1 terminal and install WiNet-S.

37

5 Electrical Connection User Manual

step 7 Slightly shake it by hand to determine whether it is installed firmly.

- - End

5.7.2 WLAN Communication

step 1 Remove the waterproof lid from the COM1 terminal.

step 2 Install the module. Slightly shake it by hand to determine whether it is installed firmly, as

shown below.

step 3 Refer to the guide delivered with the module for the set-up.

- - End

5.8 Smart Meter Connection

step 1 Unscrew the swivel nut from the communication connector.

step 2 Remove the seal and lead the cable through the cable gland.

38

User Manual 5 Electrical Connection

step 3 Remove the cable jacket and strip the wire insulation.

step 4 (Optional) When using a multi-core multi-strand wire cable, connect the wire head to the

cord end terminal. In case of single-strand copper wire, skip this step.

step 5 Plug the wires into the corresponding terminals as shown in the following figure. Ensure that

the wires are securely in place by slightly pulling them.

39

5 Electrical Connection User Manual

step 6 Insert the terminal plug into the COM2 terminal at the bottom side of the inverter and then in-

stall the housing.

step 7 Slightly pull out the cable and then fasten the swivel nut. Lock the connector with the screw.

- - End

5.9 DRM Connection

In Australia and New Zealand, the inverter supports DRM0 as specified in the standard AS/
NZS 4777.
The DRM0 mode is asserted by shorting terminals R and C on the inverter.

step 1 Unscrew the swivel nut from the communication connector.

40

User Manual 5 Electrical Connection

step 2 Remove the seal and lead the cable through the cable gland.

step 3 Remove the cable jacket and strip the wire insulation.

step 4 (Optional) When using a multi-core multi-strand wire cable, connect the wire head to the

cord end terminal. In case of single-strand copper wire, skip this step.

41

5 Electrical Connection User Manual

step 5 Plug the wires into the corresponding terminals as shown in the following figure. Ensure that

the wires are securely in place by slightly pulling them.

step 6 Insert the terminal plug into the COM2 terminal at the bottom side of the inverter and then in-

stall the housing.

step 7 Slightly pull out the cable and then fasten the swivel nut. Lock the connector with the screw.

42

User Manual 5 Electrical Connection

- - End

43

6

Commissioning

6.1 Inspection before Commissioning

Check the following items before starting the inverter:

• All equipment has been reliably installed.

• DC switch(es) and AC circuit breaker are in the "OFF" position.

• The ground cable is properly and reliably connected.

• The AC cable is properly and reliably connected.

• The DC cable is properly and reliably connected.

• The communication cable is properly and reliably connected.

• The vacant terminals are sealed.

• No foreign items, such as tools, are left on the top of the machine or in the junction box (if
there is).

• The AC circuit breaker is selected in accordance with the requirements of this manual
and local standards.

• All warning signs & labels are intact and legible.

6.2 Powering on the System

If all of the items mentioned above meet the requirements, proceed as follows to start up the
inverter for the first time.

step 1 Turn on the AC circuit breaker between the inverter and the grid.

step 2 Rotate the DC switch of the inverter to "ON" position.

step 3 Turn on the external DC switch (if applicable) between the inverter and the PV string.

step 4 If the irradiation and grid conditions meet requirements, the inverter will operate normally.

Observe the LED indicator to ensure that the inverter operates normally. Refer to

for LED screen introduction and LED indicator definition.

Panel"

step 5 Refer to the quick guide for WiNet-S for its indicator definition.

- - End

"2.4 LED

6.3 App Preparation

step 1 Install the iSolarCloud App with latest version. Refer to "7.2 Installing the App".

44

User Manual 6 Commissioning

step 2 Register an account. Refer to "7.3 Account Registration". If you have got the account and

password from the distributor/installer or SUNGROW, skip this step.

step 3 Download the firmware package to the mobile device in advance. Refer to “Firmware Upa-

date”. This is to avoid download failure due to poor on-site network signal.

- - End

6.4 Creating a Plant

Screenshots of creating a plant are for reference only. For details, refer to the actual screen.

step 1 Open the App, tap

server as when registering.

at the upper right corner and tap Select Server. Choose the same

figure 6-1 Selecting the Server

step 2 Enter the account and password on the login screen and tap Login to enter the App home

screen.

step 3 Tap the icon

at the upper right corner to enter the creating screen.

figure 6-2 Creating Power Plant

step 4 Select plant type to RESIDENTIAL and inverter type to PV.

45

6 Commissioning User Manual

figure 6-3 Selecting Plant/Inverter Type

step 5 Scan the QR code on the communication device or manually enter the serial number of the

communication device. Tap Next after the QR code is identified or the serial number entered
is correct and then tap CONFIRM. Your mobile device is thus connected to the WiNet-S
successfully.

figure 6-4 Connecting Mobile Device to WiNet-S

step 6 Select the Internet access mode to WLAN or ETHERNET according to actual connection.

The following description is for WLAN access mode.

figure 6-5 Selecting Internet Access Mode

step 7 The EASYCONNECT INSTRUCTION screen will prompt. Press the multi-function button on

the WiNet-S module once to turn on EasyConnect mode. The WLAN indicator on WiNet-S

46

User Manual 6 Commissioning

blinks quickly when this mode is turned on. Return to the App and the screen displays suc­cessful connection to the inverter WLAN. Tap NEXT.

figure 6-6 Turn on EasyConnect Mode

The EasyConnect mode can be used only when the router is 2.4 GHz.

If the EasyConnect mode fails, refer to the WiNet-S quick guide for the instructions

of other modes.

step 8 Connect the inverter to router network. Enter network name and password. Tap NEXT and

the screen display prompt information of successful connection to the router network.

figure 6-7 Connecting Inverter to Router Network

- - End

6.5 Initializing the Device

The inverter is successfully connected to the router.
If there is no latest equipment upgrade package, skip steps 1 and 2.
The actual initializing procedure may differ due to different countries. Please follow the ac­tual App guidance.

step 1 If a latest equipment upgrade package is available, the following prompt window pops up.

Tap UPDATE NOW to download the latest update package.

47

6 Commissioning User Manual

figure 6-8 Upgrade Reminder

step 2 After download, it would take around 15 minutes to update. After successful upgrade, the

screen will show the version numbers before and after the upgrade as well as the upgrade
time. Tap NEXT.

figure 6-9 Upgrading Inverter

If the communication equipment is upgraded, after successful upgrade, check and

confirm that the phone is connected to the inverter WLAN.

step 3 Tap Country/Region and select the country where the inverter is installed at. The supported

countries and corresponding settings are as follows.

Country/Region Setting

Belgium ("BE") Belgium

Netherlands ("NL") Netherlands

Portugal / Turkey / Hungary / Romania /

EN50549-1, with proper manual settings

Greece / Lithuania

Poland ("PL") Poland

United Kingdom

United Kingdom

United Kingdom_G98

France France

48

Italy Italy

User Manual 6 Commissioning

Country/Region Setting

Spain Spain

Australia ("AU") Australia

New Zealand ("NZ") New Zealand

Countries not listed above Other 50Hz or Other 60Hz

The parameter Country/Region must be set to the country (region) where the inver-

ter is installed at. Otherwise, the inverter may report errors.

step 4 When the country is set to Australia, additionally set the applicable network service provider

and then the grid type.

The image shown here is for reference only. Refer to the actual interface for the supported
network service providers.

table 6-1 Description of Network Service Provider and Grid Type

Network Service Provider Grid Type

AS/NZS 4777.2:2015 /
AS/NZS 4777.2:2020

/

Australia A
AS/NZS 4777.2:2020

/

Australia B

49

6 Commissioning User Manual

Network Service Provider Grid Type

AS/NZS 4777.2:2020

/

Australia C

• STNW1170: single-phase ＜ 10 kVA &

ENERGEX & Ergon Energy

three-phase ＜ 30 kVA

• STNW1174: 30 kVA ＜ Pn≤ 1500 kVA

• ≤ 10 kVA per phase (or 30 kVA per three

Jemena

phase)

• ELE GU 0014: 30 kVA–200 kVA

Endeavour Energy

Ausgrid

MDI 0043

NS194

• ≤ 5 kVA for single-phase & 30 kVA for

CitiPower & Powercor

three-phase

• ＞ 30 kVA three-phase

• UE-ST-2008.1: ≤ 10 kVA for single-

United Energy

phase & 30 kVA for three-phase

• UE-ST-2008.2: ＞ 30 kVA three-phase

Embedded Generation Notice Photovoltaic

PowerWater

Systems:2020

• TS129-2019: < 10 kW for single-phase
& 30 kW for three-phase

SA Power Networks

• TS130-2017: > 30 kW & ≤ 200 kW

• TS131-2018: > 200 kW

• HPC-9DJ-13-0001-2019: ≤ 10kVA for

Horizon Power

single-phase & 30 kVA for three-phase

• HPC-9DJ-13-0002-2019: > 30kVA &
≤1MVA

westernpower

EDM＃33612889-2019

AusNet Services Basic Micro Embedded Generation: 2020

* For compliance with AS/NZS 4777.2:2020, please select from Australia A/B/C. Please con­tact your electricity grid operator for which region to use.

step 5 Initialize parameters according to local grid requirements, including grid type, reactive power

regulation mode, etc. The screen displays that the inverter is successfully configured.

50

User Manual 6 Commissioning

figure 6-10 Initializing Parameters

- - End

6.6 Configuring the Plant

The inverter is successfully added to the plant and initialized. Refer to the guidance in pre­vious sections.
The distributor/installer who creates a plant for the end user needs to get the end user's e­mail address. In configuring a plant, the e-mail address is required, and each e-mail address
can be registered only once.

step 1 The App screen will display the added inverter. Tap NEXT to configure the plant.

figure 6-11 Display the Added Inverter

step 2 Fill in the plant information. The fields marked with * must be filled in.

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6 Commissioning User Manual

figure 6-12 Entering Plant Information

step 3 (Optional) Fill in the tariff information. The electricity price can be set to a specific value or

Time-of-Use tariff.

figure 6-13 Entering Tariff Information

step 4 Fill in the end user's e-mail address. The first time you fill in the end user's e-mail address,

the system will create an account for the end user and send an email to the end user. The
end user can activate the account via the email.

The Distributor/installer creates plants for the end user and can manage the plants
by default.

52

User Manual 6 Commissioning

figure 6-14 Entering Owner's e-mail

step 5 Tap NEXT to wait for the inverter to connect to the iSolarCloud.

figure 6-15 Configuration Completed

step 6 (Optional) Tab View live data for the device, tick Inverter or Total Plant Devices and tab

ALL PLANTS OPEN. The clock symble indicates that the live data view function is success­fully enabled. Tab the inverter to view the live data about voltage, current, power or curve.

53

6 Commissioning User Manual

figure 6-16 Live Data View Function Setting

Contact Sungrow service to enable live data function of devices. Once enabled,
live data function is available for 3 hours per day by default. To make it available
for 24 hours, contact SUNGROW.

step 7 Tab BACK to the COMPLETED screen. Tab PDF REPORT to export the plant configuration

report.

step 8 Tab BACK to the COMPLETED screen. Tab DASHBOARD to return and manually refresh

the page until the newly created plant is displayed with status commissioned.

- - End

54

7

iSolarCloud App

7.1 Brief Introduction

The iSolarCloud App can establish communication connection to the inverter via the WLAN,
providing remote monitoring, data logging and near-end maintenance on the inverter. Users
can also view inverter information and set parameters through the App.
* To achieve direct login via WLAN, the wireless communication module developed and
manufactured by SUNGROW is required. The iSolarCloud App can also establish communi­cation connection to the inverter via Ethernet connection.

• This manual describes only how to achieve near-end maintenance via WLAN
direct connection.

• Screenshots in this manual are based on the V2.1.6 App for Android system,
and the actual interfaces may differ.

7.2 Installing the App

Method 1

Download and install the App through the following application stores:

• MyApp (Android, mainland China users)

• Google Play (Android, users other than mainland China ones)

• App Store (iOS)

Method 2

Scan the following QR code to download and install the App according to the prompt
information.

The App icon appears on the home screen after installation.

55

7 iSolarCloud App User Manual

7.3 Account Registration

The account distinguishes two user groups, end user and distributor/installer.

• The end user can view plant information, create plants, set parameters, share plants, etc.

• The distributor/installer can help the end user to create plants, manage, install, or main­tain plants, and manage users and organizations.

step 1 Tap REGISTER to enter the registration screen.

step 2 Select the relevant server for your area.

step 3 Select End user or Distributor/Installer to enter the corresponding screen.

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User Manual 7 iSolarCloud App

step 4 Fill in the registration information, including email, verification code, password and affirm-

ance and country (region). The distributor/installer has the permission to fill in the company
name and the code of upper level distributor/installer.

The code of upper level distributor/installer can be obtained from the upper level
distributor/installer. Only when your organization belongs to the upper level distrib­utor/installer organization, can you fill in the corresponding code.

step 5 Tick Accept privacy protocol and tap Register to finish the registration operation.

- - End

7.4 Login

7.4.1 Requirements

The following requirements should be met:

• The AC or DC side of the inverter is powered-on.

• The WLAN function of the mobile phone is enabled.

• The mobile phone is within the coverage of the wireless network produced by the com­munication module.

7.4.2 Login Procedure

step 1 For the WiNet-S module, press the multi-function button 3 times to enable the WLAN hot-

spot. No password is required and the valid time is 30 minutes.

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7 iSolarCloud App User Manual

figure 7-1 Enabling the WLAN Hotspot

step 2 Connect the mobile phone to the WLAN network named as "SG-xxxxxxxxxxx" (xxxxxxxxxxx

is the serial number indicated on the side of the communication module).

step 3 Open the App to enter the login screen. Tap Local Access to enter the next screen.

step 4 Select WLAN and select the device (SN), then enter the password and tap LOGIN.

• If the WiFi signal, serial number or inverter related data information cannot be
found, unplug and reinsert the Winet-S or press the multi-function button of the
Winet-S three times.

• The default account is "user" and the initial password is "pw1111" which should
be changed for the consideration of account security. Tap "More" at the lower
right corner on home page and choose "Change Password".

figure 7-2 WLAN Local Access

step 5 If the inverter is not initialized, navigate to the quick setting screen to initialize the protection

parameters. For details, please refer to "Initial Settings".

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User Manual 7 iSolarCloud App

The "Country/Region" must be set to the country where the inverter is installed at.

Otherwise, the inverter may report errors.

figure 7-3 WLAN Local Access

step 6 After finishing the settings, tap TUNR ON DEVICE at the upper right corner and the device

will be initialized. The App will send start instructions and the device will start and operate.

step 7 After initialization settings, the App will return automatically to the home page.

- - End

7.5 Initial Settings

Tap Country/Region and select the country where the inverter is installed. For countries ex­cept Australia and Germany, the initialization is completed.

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7 iSolarCloud App User Manual

The actual initializing procedure may differ due to different countries. Please fol­low the actual App guidance.

For some countries, you should initialize parameters according to local grid re­quirements. For details, see

"6.5 Initializing the Device".

7.6 Function Overview

The App provides parameter viewing and setting functions, as shown in the following figure.

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User Manual 7 iSolarCloud App

figure 7-4 App Key Function Menu

7.7 Home

Home page of the App is shown in the following figure.

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7 iSolarCloud App User Manual

figure 7-5 Home

table 7-1 Home Page Description

No. Name

1 Inverter state

2

Energy flow
chart

Real-time

3

4

5

6

7

power

Nominal power Shows the installed power of the inverter.

Today yield Shows today power generation of the inverter

Total yield Shows accumulative power generation of the inverter

Navigation bar

If the inverter runs abnormally, the fault icon
screen. Users can tap the icon to view detailed fault information and corrective measures.

7.8 Run Information

Tap Run Information on the navigation bar to enter the screen showing running information,
slide the screen upwards to view all detailed information.

Description

Present operation state of the inverter

Shows the PV power generation power, feed-in power, etc.
The line with an arrow indicates energy flow between con­nected devices, and the arrow pointing indicates energy flow
direction.

Shows the present output power of the inverter.

Includes menus of "Home", "Run Infomation", "Records"
and "More".

will appear on the upper left corner of the

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User Manual 7 iSolarCloud App

table 7-2 Description of Run Information

Item

PV information

Inverter
information

Input Shows total DC power, voltage and current of MPPT1 and MPPT2.

Output

Grid information

7.9 Records

Tap Records on the navigation bar to enter the screen showing event records, as shown in
the following figure.

Description

Shows voltage and current of every PV string.

Shows basic information such as running state, on-grid running time,
negative voltage to grid, bus voltage, internal air temperature, inver­ter efficiency, etc.

Shows daily/monthly/annual/total yield, total active/reactive/appa­rent power, total power factor, grid frequency, phase voltage and
current.
Shows daily/total feed-in energy, daily/total purchased energy.

figure 7-6 Records

Chart

Tap Chart to enter the screen showing daily power generation, as shown in the following
figure.

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figure 7-7 Chart

The App displays power generation records in a variety of forms, including daily power gen­eration graph, monthly power generation histogram, annual power generation histogram
and total power generation histogram.

table 7-3 Description of Power Curve

Item

Description

Daily Daily curve that indicates the real-time power.

Month

Year

Total

Monthly curve that indicates daily yield and equivalent hours in a month.

Annual curve that indicates monthly yield and equivalent hours in a year.

A curve that indicates annual yield and equivalent hours since installation.

Fault Alarm Record

Tap Fault Alarm Record to enter the screen, as shown in the following figure.

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User Manual 7 iSolarCloud App

figure 7-8 Fault Alarm Record

Click to select a time segment and view corresponding records.

Select one of the records in the list and click the record, to view the detailed fault info as
shown in following figure.

figure 7-9 Detailed Fault Alarm Information

Event Record

Tap Event Record to enter the screen, as shown in the following figure.

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figure 7-10 Event Record

Click to select a time segment and view corresponding records.

7.10 More

Tap More on the navigation bar to enter the corresponding screen, as shown in the following
figure.

66

figure 7-11 More

In addition to viewing the WLAN configuration and App software version, the More screen
supports the following operations:

• Set parameters including inverter system parameters, operation parameters, power reg­ulation parameters and communication parameters.

• Upgrade inverter firmware.

User Manual 7 iSolarCloud App

7.10.1 System Parameters

Tap Settings→System Parameters to enter the corresponding screen, as shown in the fol­lowing figure.

figure 7-12 System Parameters

* The image shown here is for reference only.

Boot/Shutdown

Tap Boot/Shutdown to send the boot/shutdown instruction to the inverter.
For Australia and New Zealand, when the DRM state is DRM0, the "Boot" option will be
prohibited.

Date Setting/Time Setting

The correct system time is very important. Wrong system time will directly affect the data
logging and power generation value. The clock is in 24-hour format.

Software Version

Version information of the current firmware.

7.10.2 Operation Parameters

Running Time

Tap Settings→Operation Parameters→Running Time to enter the corresponding screen,
on which you can set "Connecting Time" and "Reconnecting Time".

PID Parameters

Tap Settings→Operation Parameters→PID Parameters to enter the corresponding
screen, on which you can set "PID Parameters".

figure 7-13 Running Time

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figure 7-14 PID Setting

table 7-4 PID Parameter Description

Parameter

Description

Set enabling/disabling of the PID night recovery function. PID night

PID Recovery

recovery function operates between 22:00 pm and 5:00 am by
default.

AFCI Parameters(Optional)

Tap Settings→Operation Parameters→AFCI Parameters to enter the corresponding
screen, on which you can set "AFCI Parameters".

7.10.3 Power Regulation Parameters

Active Power Regulation

Tap Settings→Power Regulation Parameters→Active Power Regulation to enter the
screen, as shown in the following figure.

figure 7-15 AFCI Setting

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User Manual 7 iSolarCloud App

figure 7-16 Active Power Regulation

table 7-5 Description of Active Power Regulation Parameters

Parameter

Active Power Soft Start

after Fault

Active Power Soft Start

Time after Fault

Active Power Gradient

Control

Active Power Decline

Gradient

Active Power Rising

Gradient

Active Power Setting

Persistence

Active Power Limit

Active Power Limit

Ratio

Description Range

Switch for activating/deactivating the function
of active power soft start after a fault occurs

On/Off

The soft start time required for raising active
power from 0 to rated value after a fault occurs

Set whether to enable active power gradient
control
Decline gradient of inverter active power per
minute
Rising gradient of inverter active power per
minute

1 s–1200 s

On/Off

1 %/min–
6000 %/min
1 %/min–

6000 %/min
Switch for activating/deactivating the function
of active power setting persistence

Switch for limiting active power

The ratio of active power limit to rated power in
percentage

On/Off

On/Off

0.0 %–

100.0 %

Reactive Power Regulation

Tap Settings→Power Regulation Parameters→Reactive Power Regulation to enter the
screen, as shown in the following figure.

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figure 7-17 Reactive Power Regulation

table 7-6 Description of Reactive Power Regulation Parameters

Parameter

Reactive Power Set-

ting Persistence

Reactive Power Regu-

lation Mode

Reactive Response

Reactive Response

Time

Description Range

Switch for activating/deactivating the function
of reactive power setting persistence

Off/PF/Qt/Q(P)/Q(U)

On/Off

Off/PF/Qt/Q
(P)/Q(U)

Switch for activating/deactivating the function
of reactive response

Time for reactive response

On/Off

0.1 s-600 s

"Off" Mode

The reactive power regulation function is disabled. The PF is fixed at +1.000.

"PF" Mode

The power factor (PF) is fixed and the reactive power is regulated by the parameter PF. 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 injecting reactive power into the grid.

"Qt" Mode

In the Qt mode, the reactive power can be regulated by the parameter Q-Var limits (in %).
The system rated reactive power is fixed, the system injects reactive power according to the
delivered reactive power ratio. The "Reactive Power Ratio" is set through the App.
The setting range of the reactive power ratio is from -100 % to 100 %, corresponding to the
ranges of inductive and capacitive reactive power regulation respectively.

"Q(P)" Mode

The PF of the inverter output varies in response to the output power of the inverter.

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User Manual 7 iSolarCloud App

table 7-7 "Q(P)" Mode Parameters Explanation

Parameter Explanation Range

Q(P) Curve Select corresponding curve according to local

A, B, C

*

regulations

QP_P1 Output power at point P1 on the Q(P) mode curve

0.0 %–100.0 %

(in %)

QP_P2 Output power at point P2 on the Q(P) mode curve

20.0 %–100.0 %

(in %)

QP_P3 Output power at point P3 on the Q(P) mode curve

20.0 %–100.0 %

(in %)

QP_K1 Power factor at point P1 on the Q(P) mode curve Curve A/C: 0.800

QP_K2 Power factor at point P2 on the Q(P) mode curve

to 1.000

Curve B: -0.600

QP_K3 Power factor at point P3 on the Q(P) mode curve

QP_

Voltage for Q(P) function activation (in %) 100.0 %–110.0

EnterVoltage

QP_

Voltage for Q(P) function deactivation (in %) 90.0 %–100.0 %

to 0.600

%

ExitVoltage

QP_

Power for Q(P) function deactivation (in %) 1.0 %–100.0 %

ExitPower

QP_
EnableMode

Unconditional activation/deactivation of Q(P)
function

* Curve C is reserved and consistent with Curve A currently.

figure 7-18 Reactive Power Regulation Curve in Q(P) Mode

"Q(U)" Mode

Yes, No

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7 iSolarCloud App User Manual

The reactive power output of the inverter varies in response to the grid voltage.

table 7-8 "Q(U)" Mode Parameter Explanation

Parameter

Q(U) curve

Hysteresis
Ratio

QU_V1

QU_V2

QU_V3

QU_V4

QU_Q1

QU_Q2

Explanation Range

Select corresponding curve according to local
regulations

Voltage hysteresis ratio on the Q(U) mode curve

A, B, C

0.0 %–5.0 %

Grid voltage limit at point P1 on the Q(U) mode curve
(in %)

80.0 %–100.0 %

Grid voltage limit at point P2 on the Q(U) mode curve
(in %)

Grid voltage limit at point P3 on the Q(U) mode curve
(in %)

Grid voltage limit at point P4 on the Q(U) mode curve
(in %)

80.0 %–100.0 %

100.0 %–120.0
%

100.0 %–120.0
%

Value of Q/Sn at point P1 on the Q(U) mode curve (in
%)

Value of Q/Sn at point P2 on the Q(U) mode curve (in
%)

-60.0 % to 0.0 %

-60.0 % to 60.0
%

*

72

QU_Q3

QU_Q4

QU_

Value of Q/Sn at point P3 on the Q(U) mode curve (in
%)

Value of Q/Sn at point P4 on the Q(U) mode curve (in
%)

Active power for Q(U) function activation (in %)

EnterPower

QU_

Active power for Q(U) function deactivation (in %)

ExitPower

QU_

Unconditional activation/deactivation of Q(U) function

EnableMode

QU_Limited
PF Value

Preset PF value 0–1

* Curve C is reserved and consistent with Curve A currently.

-60.0 % to 60 %

0.0 % to 60.0 %

20.0 %–100.0 %

1.0 %–20.0 %

Yes, No, Yes
(Limited by PF)

User Manual 7 iSolarCloud App

figure 7-19 Reactive Power Regulation Curve in Q(U) Curve

7.10.4 Communication Parameters

Tap Settings→Communication Parameters→Serial Port Parameters to enter the corre­sponding interface, as shown in the following figure.

figure 7-20 Serial Port Parameters

table 7-9 Serial Port Parameters

Parameter

Range

Device Address 1–246

MPLC Parameters

Tap Settings→Communication Parameters→MPLC Parameters to enter the correspond­ing interface, as shown in the following figure.

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7 iSolarCloud App User Manual

figure 7-21 MPLC Parameters

table 7-10 MPLC Parameters

Parameter

Range

Band Num Band1, Band2

Array ID 1–255

Winding ID 1–10

7.10.5 Firmware Update

To avoid download failure due to poor on-site network signal, it is recommended to download
the firmware package to the mobile device in advance.

step 1 Enable the "Mobile data" of the mobile device.

step 2 Open the App, enter the account and password on the login screen. Tap Login to enter the

home screen.

step 3 Tap More→Firmware Download to enter corresponding screen on which you can view the

device list.

step 4 Select the device model before downloading the firmware. Tap the device name in the de-

vice list to enter the firmware upgrade package detail interface, and tap
ware upgrade package to download it.

behind the firm-

step 5 Return to the Firmware Download screen, tap in the upper right corner of the screen to

view the downloaded firmware upgrade package.

step 6 Login the App via local access mode. Refer to

"7.4 Login".

step 7 Tap More on the App home screen and then tap Firmware Update.

step 8 Tap the upgrade package file, a prompt box will pop up asking you to upgrade the firmware

with the file, tap CONFIRM to perform the firmware upgrade.

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User Manual 7 iSolarCloud App

step 9 Wait for the file to be uploaded. When the upgrade is finished, the interface will inform you of

the upgrade completion. Tap Complete to end the upgrade.

- - End

7.10.6 Auto-test

Tap Auto-test to enter the corresponding screen, as shown in the following figure.

figure 7-22 Auto-test

Launch Auto-test

Tap Launch Auto-test carry out an auto-test. Auto-testing will take about 5 minutes. When
the auto-test is completed, the auto-test report is displayed, as shown in the figure below.
Tap DOWNLOAD to download the report.

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7 iSolarCloud App User Manual

figure 7-23 Auto-test Result

Clear Auto-test Fault

Tap Clear Auto-test Fault→CONFIRM to clear the auto-test fault.

76

figure 7-24 Clear Auto-test Fault

8

System Decommissioning

8.1 Disconnecting the Inverter

Risk of burns due to hot components!

Even if the inverter is shut down, it may still be hot and cause burns. Wear protec-

tive gloves before operating the inverter after it cools down.

For maintenance or other service work, the inverter must 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 otherwise.

step 1 Disconnect the external AC circuit breaker and secure it against reconnection.

step 2 Rotate the DC switch to the "OFF" position for disconnecting all of the PV string inputs.

step 3 Wait about 10 minutes until the capacitors inside the inverter completely discharge.

step 4 Ensure that the DC cable is current-free via a current clamp.

- - End

8.2 Dismantling the Inverter

Risk of burn injuries and electric shock!

After the inverter is powered off for 10 minutes, measure the voltage and current

with professional instrument. Only when there is no voltage nor current can opera-

tors who wear protective equipment operate and maintain the inverter.

Before dismantling the inverter, disconnect both AC and DC connections.

If there are more than two layers of inverter DC terminals, dismantle the outer DC
connectors before dismantling the inner ones.

step 1 Refer to

steps. In particular, when removing the DC connector, use an MC4 wrench to loosen the
locking parts and install waterproof plugs.

"5 Electrical Connection", for the inverter disconnection of all cables in reverse

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8 System Decommissioning User Manual

step 2 Refer to"4 Mechanical Mounting", to dismantle the inverter in reverse steps.

step 3 If necessary, remove the wall-mounting bracket from the wall.

step 4 If the inverter will be used again in the future, please refer to

proper conservation.

- - End

8.3 Disposal of the Inverter

Users take the responsibility for the disposal of the inverter.

Please scrap the inverter in accordance with relevant local regulations and stand-

ards to avoid property losses or casualties.

Some parts of the inverter may cause environmental pollution. Please dispose of

them in accordance with the disposal regulations for electronic waste applicable at

the installation site.

"3.2 Inverter Storage" for a

78

9

Troubleshooting and Maintenance

9.1 Troubleshooting

Once the inverter fails, the fault information can be displayed on the App interface. If the in­verter is equipped with an LCD screen, the fault information can be viewed on it.
The fault codes and troubleshooting methods of all PV inverters are detailed in the table be­low. The device you purchase may only contain some of the fault information, and when the
inverter fails, you can check the corresponding information through the fault codes from the
mobile app.

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9 Troubleshooting and Maintenance User Manual

Fault code Fault name Corrective measures

Generally, the inverter will be reconnected to
the grid after the grid returns to normal. If the
fault occurs repeatedly:

1. Measure the actual grid voltage, and con­tact the local electric power company for solu­tions if the grid voltage is higher than the set
value.

2, 3, 14, 15

Grid Overvoltage

2. Check whether the protection parameters
are appropriately set via the App or the LCD.
Modify the overvoltage protection values with
the consent of the local electric power
operator.

3. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.

Generally, the inverter will be reconnected to
the grid after the grid returns to normal. If the
fault occurs repeatedly:

1. Measure the actual grid voltage, and con­tact the local electric power company for solu­tions if the grid voltage is lower than the set
value.

4, 5

Grid Undervoltage

2. Check whether the protection parameters
are appropriately set via the App or the LCD.

3. Check whether the AC cable is firmly in
place.

4. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.

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User Manual 9 Troubleshooting and Maintenance

Fault code Fault name Corrective measures

8

Grid Overfrequency

Generally, the inverter will be reconnected to
the grid after the grid returns to normal. If the
fault occurs repeatedly:

1. Measure the actual grid frequency, and con­tact the local electric power company for solu­tions if the grid frequency is beyond the set

9

Grid Underfrequency

range.

2. Check whether the protection parameters
are appropriately set via the App or the LCD.

3. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.

Generally, the inverter will be reconnected to
the grid after the grid returns to normal. If the
fault occurs repeatedly:

1. Check whether the grid supplies power
reliably.

2. Check whether the AC cable is firmly in
place.

10

Grid Power Outage

3. Check whether the AC cable is connected
to the correct terminal (whether the live wire
and the N wire are correctly in place).

4. Check whether the AC circuit breaker is
connected.

5. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.

1. The fault can be caused by poor sunlight or
damp environment, and generally the inverter
will be reconnected to the grid after the envi­ronment is improved.

12

Excess Leakage
Current

2. If the environment is normal, check whether
the AC and DC cables are well insulated.

3. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.

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9 Troubleshooting and Maintenance User Manual

Fault code Fault name Corrective measures

Generally, the inverter will be reconnected to
the grid after the grid returns to normal. If the
fault occurs repeatedly:

1. Measure the actual grid, and contact the lo-

13 Grid Abnormal

cal electric power company for solutions if the
grid parameter exceeds the set range.

2. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.

Generally, the inverter will be reconnected to
the grid after the grid returns to normal. If the
fault occurs repeatedly:

1. Measure the actual grid voltage. If grid
phase voltages differ greatly, contact the elec­tric power company for solutions.

17

Grid Voltage Imbalance

2. If the voltage difference between phases is
within the permissible range of the local power
company, modify the grid voltage imbalance
parameter through the App or the LCD.

3. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.

1. Check whether the corresponding string is
of reverse polarity. If so, disconnect the DC
switch and adjust the polarity when the string
current drops below 0.5 A.

2. Contact Sungrow Customer Service if the

28, 29, 208,
448-479

PV Reserve Connection
Fault

preceding causes are ruled out and the fault
persists.

*The code 28 to code 29 are corresponding to
PV1 to PV2 respectively.

*The code 448 to code 479 are corresponding
to string 1 to string 32 respectively.

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User Manual 9 Troubleshooting and Maintenance

Fault code Fault name Corrective measures

1. Check whether the corresponding string is
of reverse polarity. If so, disconnect the DC
switch and adjust the polarity when the string
current drops below 0.5 A.

2. Contact Sungrow Customer Service if the

532-547,
564-579

PV Reverse Connection
Alarm

preceding causes are ruled out and the alarm
persists.

*The code 532 to code 547 are corresponding
to string 1 to string 16 respectively.

*The code 564 to code 579 are corresponding
to string 17 to string 32 respectively.

Check whether the voltage and current of the
inverter is abnormal to determine the cause of
the alarm.

1. Check whether the corresponding module
is sheltered. If so, remove the shelter and en­sure module cleanness.

2. Check whether the battery board wiring is
loose, if so, make it reliably connected.

548-563,
580-595

PV Abnormal Alarm

3. Check if the DC fuse is damaged. If so, re­place the fuse.

4. Contact Sungrow Customer Service if the
preceding causes are ruled out and the alarm
persists.

*The code 548 to code 563 are corresponding
to string 1 to string 16 respectively.

*The code 580 to code 595 are corresponding
to string 17 to string 32 respectively.

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9 Troubleshooting and Maintenance User Manual

Fault code Fault name Corrective measures

Generally, the inverter will resume operation
when the internal or module temperature re­turns to normal. If the fault persists:

1. Check whether the ambient temperature of
the inverter is too high;

2. Check whether the inverter is in a well-ven-

37

Excessively High Ambi­ent Temperature

tilated place;

3. Check whether the inverter is exposed to di­rect sunlight. Shield it if so;

4. Check whether the fan is running properly.
Replace the fan if not;

5. Contact Sungrow Power Customer Service
if the fault is due to other causes and the fault
persists.

Stop and disconnect the inverter. Restart the
inverter when the ambient temperature rises
within the operation temperature range.

43

Excessively Low Ambi­ent Temperature

Wait for the inverter to return to normal. If the
fault occurs repeatedly:

1. Check whether the ISO resistance protec­tion value is excessively high via the app or
the LCD, and ensure that it complies with the
local regulations.

2. Check the resistance to ground of the string

39

Low System Insulation
Resistance

and DC cable. Take corrective measures in
case of short circuit or damaged insulation
layer.

3. If the cable is normal and the fault occurs
on rainy days, check it again when the weath­er turns fine.

4. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.

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User Manual 9 Troubleshooting and Maintenance

Fault code Fault name Corrective measures

1. Check whether the AC cable is correctly
connected.

2. Check whether the insulation between the

106

Grounding Cable Fault

ground cable and the live wire is normal.

3. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.

1. Disconnect the DC power supply, and
check whether any DC cable is damaged, the
connection terminal or fuse is loose or there is
a weak contact. If so, replace the damaged
cable, fasten the terminal or fuse, and replace
the burnt component.

88 Electric Arc Fault

2. After performing step 1, reconnect the DC
power supply, and clear the electric arc fault
via the App or the LCD, after that the inverter
will return to normal.

3. Contact Sungrow Customer Service if the
fault persists.

1. Check if the meter is wrongly connected.

2. Check if the input and output wiring of the

84

Reverse Connection
Alarm of the Meter/CT

meter is reversed.

3. If the existing system is enabled, please
check if the rated power setting of the existing
inverter is correct.

1. Check whether the communication cable
and the terminals are abnormal. If so, correct
them to ensure reliable connection.

514

Meter Communication
Abnormal Alarm

2. Reconnect the communication cable of the
meter.

3. Contact Sungrow Customer Service if the
preceding causes are ruled out and the alarm
persists.

1. Check whether the output port is connected
to actual grid. Disconnect it from the grid if so.

323 Grid Confrontation

2. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.

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9 Troubleshooting and Maintenance User Manual

Fault code Fault name Corrective measures

1. Check whether the communication cable
and the terminals are abnormal. If so, correct
them to ensure reliable connection.

75

Inverter Parallel Com­munication Alarm

2. Reconnect the communication cable of the
meter.

3. Contact Sungrow Customer Service if the
preceding causes are ruled out and the alarm
persists.

7, 11, 16,
19–25, 30–
34, 36, 38,
40–42, 44–
50, 52–58,
60–68, 85,
87, 92, 93,
100–105,
107–114,
116–124,
200–211,
248–255,
300–322,
324–327,

System Fault

Wait for the inverter to return to normal.

Disconnect the AC and DC switches, and re­connect the AC and DC switches 15 minutes
later to restart the inverter. If the fault still ex-

ists, contact Sungrow Customer Service.
401–412,
600–603,
605, 608,
612, 616,
620, 622–
624, 800,
802, 804,
807, 1096–
1122

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User Manual 9 Troubleshooting and Maintenance

Fault code Fault name Corrective measures

59, 70–74,
76, 82, 83,
89, 77–81,
216–218,
220–232,
432–434,
500–513,
515–518,
900, 901,

System Alarm

1. The inverter can continue running.

2. Check whether the related wiring and termi­nal are abnormal, check whether there are
any foreign materials or other environmental
abnormalities, and take corresponding correc­tive measures when necessary.

If the fault persists, please contact Sungrow
Power Customer Service.

910, 911

1. Check whether the corresponding string is
of reverse polarity. If so, disconnect the DC
switch and adjust the polarity when the string
current drops below 0.5 A.

264-283

MPPT Reverse
Connection

2. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.

*The code 264 to code 279 are corresponding
to string 1 to string 20 respectively.

1. The inverter can continue running.

2. Check whether the related wiring and termi­nals are abnormal, check whether there are

332-363

Boost Capacitor Over­voltage Alarm

any foreign materials or other environmental
abnormalities, and take corresponding correc­tive measures when necessary.

If the fault persists, please contact Sungrow
Power Customer Service.

87

9 Troubleshooting and Maintenance User Manual

Fault code Fault name Corrective measures

Disconnect the AC and DC switches, and re-

364-395

1548-1579

Boost Capacitor Over­voltage Fault

String Current Reflux

connect the AC and DC switches 15 minutes

later to restart the inverter. If the fault still ex-

ists, contact Sungrow Customer Service.

1. Check whether the number of PV modules

of the corresponding string is less than other

strings. If so, disconnect the DC switch and

adjust the PV module configuration when the

string current drops below 0.5 A.

2. Check whether the PV module is shaded;

3. Disconnect the DC switch to check whether

the open circuit voltage is normal when the

string current drops below 0.5 A. If so, check

the wiring and configuration of the PV module,

4. Check whether the orientation of the PV

module is abnormal.

9.2 Maintenance

9.2.1 Maintenance Notices

The DC switch can be secured with a lock in the OFF position or a certain angle beyond the
OFF position.

Risk of inverter damage or personal injury due to incorrect service!

• Be sure to use special insulation tools when perform high-voltage operations.

• Before any service work, first disconnect the grid-side AC circuit breaker and
check the inverter status. If the inverter indicator is off, please wait until night to
disconnect the DC switch. If the inverter indicator is on, directly disconnect the
DC switch.

• After the inverter is powered off for 10 minutes, measure the voltage and cur­rent with professional instrument. Only when there is no voltage nor current
can operators who wear protective equipment operate and maintain the inverter

• Even if the inverter is shut down, it may still be hot and cause burns. Wear pro­tective gloves before operating the inverter after it cools down.

88

User Manual 9 Troubleshooting and Maintenance

To prevent misuse or accidents caused by unrelated personnel: Post prominent

warning signs or demarcate safety warning areas around the inverter to prevent

accidents caused by misuse.

Restart the inverter only after removing the fault that impairs safety performance.

As the inverter contains no component parts that can be maintained, never open

the enclosure, or replace any internal components.

To avoid the risk of electric shock, do not perform any other maintenance opera-

tions beyond this manual. If necessary, contact SUNGROW for maintenance. Oth-

erwise, the losses caused is not covered by the warranty.

Touching the PCB or other static sensitive components may cause damage to the

device.

• Do not touch the circuit board unnecessarily.

• Observe the regulations to protect against electrostatic and wear an anti-static
wrist strap.

9.2.2 Routine Maintenance

Item Method Period

Check the temperature and dust of the

System clean

Electrical
connection

General status
of the system

inverter. Clean the inverter enclosure if
necessary.

Check whether all cable are firmly con­nected in place.

Check whether there is damage to the
cables, especially the surface in con­tact with metal.

• Visual check for any damage or de­formation of the inverter.

• Check any abnormal noise during
the operation.

• Check each operation parameter.

Six months to a year

(depending on the dust con­tents in air)

6 months after commissioning
and then once or twice a year.

Every 6 months

• Be sure that nothing covers the
heat sink of the inverter.

89

10

Appendix

10.1 Technical Data

Parameter SG2.0RS-S SG2.5RS-S SG3.0RS-S

Input (DC)

Recommended max. PV in­put power

Max. PV input voltage

Min. operating PV voltage /
Start-up input voltage

Nominal input voltage

MPP voltage range

No. of MPPTs 1
Default No. of PV strings
per MPPT

Max. PV input current

Max. DC short-circuit
current

Output (AC)

Rated AC output power

Max. AC output apparent
power

Rated AC output apparent
power

Rated AC output current (at
230 V)

Max. AC output current

Rated AC voltage

AC voltage range

Rated grid frequency / Grid
frequency range

Harmonic (THD) < 3 % (at rated power)

Power factor at rated power
/ Adjustable power factor

Feed-in phases / connec­tion phases

3.0 kWp 3.75 kWp 4.5 kWp

*

600 V

40 V / 50 V

360 V

40 V – 560 V

1

16 A

20 A

2000 W 2500 W 3000 W

2000 VA 2500 VA 3000 VA

2000 VA / /

8.7 A 10.9 A 13.1 A

9.1 A 11.4 A 13.7 A

220 V / 230 V / 240 V

154 V – 276 V

50 Hz / 45 Hz – 55 Hz, 60 Hz / 55 Hz – 65 Hz

> 0.99 / 0.8 leading - 0.8 lagging

1 / 1

90