Sungrow SG30CX, SG40CX, SG33CX, SG50CX, SG250HX User Manual

SSGG3300__3333__4400__5500CCXXPPVV GGrriidd--

CCoonnnneecctteedd IInnvveerrtteerrUUsseerr

MMaannuuaallSSGG3300__3333__4400__5500CCXX--UUEENN--

VVeerr1133--220011991111

SG30_33_40_50CX-UEN-Ver13-201911

SG30_33_40_50CX

PPVV GGrriidd--CCoonnnneecctteedd IInnvveerrtteerr

UUsseerr MMaannuuaall

All Rights Reserved

AAllll RRiigghhttss RReesseerrvveedd

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").

TTrraaddeemmaarrkkss

and other Sungrow trademarks used in this manual are owned by

Sungrow Power Supply Co., Ltd.

All other trademarks or registered trademarks mentioned in this document are owned

by their respective owners.

SSooffttwwaarree LLiicceennsseess

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

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

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

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

Sungrow Power Supply Co., Ltd.

Address: NNoo..11669999 XXiiyyoouu RRdd..,, NNeeww && HHiigghh TTeecchh ZZoonnee,, HHeeffeeii,, 223300008888,, CChhiinnaa..

Email: iinnffoo@@ssuunnggrrooww..ccnn

Tel: [phone]

Website: wwwwww..ssuunnggrroowwppoowweerr..ccoomm

I

About This Manual

The manual mainly describes the product information, guidelines for installation,

operation and maintenance. The manual cannot include complete information about the

photovoltaic (PV) system. You can get additional information about other devices at

wwwwww.. ssuunnggrroowwppoowweerr.. ccoomm or on the webpage of the respective component

manufacturer.

VVaalliiddiittyy

This manual is valid for the following inverter types:

• SG30CX

• SG33CX

• SG40CX

• SG50CX

They will be referred to as “inverter” hereinafter unless otherwise specified.

TTaarrggeett GGrroouupp

This manual is intended for:

• qualified personnel who are responsible for the installation and commissioning of the

inverter; and

• inverter owners who will have the ability to interact with the inverter.

HHooww ttoo UUssee TThhiiss MMaannuuaall

Read the manual and other related documents before performing any work on the

inverter is carried out. Documents must be stored carefully and be available at all times.

The contents of the manual will be periodically updated or revised due to the product

development. It is probably that there are changes of manual in the subsequent inverter

edition. The latest manual can be acquired via visiting the website at wwwwww..

ssuunnggrroowwppoowweerr..ccoomm.

SSyymmbboollss

Important instructions contained in this manual should be followed during installation,

operation and maintenance of the inverter. They will be highlighted by the following

symbols.

SSyymmbbooll EExxppllaannaattiioonn

Indicates a hazard with a high level of risk that, if not avoided, will

result in death or serious injury.

Indicates a hazard with a medium level of risk that, if not avoided,

could result in death or serious injury.

Indicates a hazard with a low level of risk that, if not avoided, could

result in minor or moderate injury.

II

SSyymmbbooll EExxppllaannaattiioonn

Indicates a situation that, if not avoided, could result in equipment or

property damage.

Indicates additional information, emphasized contents or tips that

may be helpful, e.g. to help you solve problems or save time.

III

CCoonntteennttss

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

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

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

1.1 PV Panels..................................................................................................... 1

1.2 Utility Grid .................................................................................................... 1

1.3 Inverter ........................................................................................................ 2

1.4 Skills of Qualified Personnel.......................................................................... 3

2 Product Introduction ................................................................................... 4

2.1 Intended Usage............................................................................................ 4

2.2 Product Introduction..................................................................................... 5

2.2.1 Model Description............................................................................... 5

2.2.2 Appearance........................................................................................ 6

2.2.3 Dimensions ........................................................................................ 7

2.2.4 LED Indicator Panel ............................................................................ 7

2.2.5 DC Switch........................................................................................... 8

2.3 Circuit Diagram ............................................................................................ 8

2.4 Function Description .................................................................................... 8

3 Unpacking and Storage ........................................................................... 11

3.1 Unpacking and Inspection .......................................................................... 11

3.2 Identifying the Inverter ................................................................................ 11

3.3 Scope of Delivery ....................................................................................... 13

3.4 Inverter Storage ......................................................................................... 13

4 Mechanical Mounting .............................................................................. 15

4.1 Safety during Mounting .............................................................................. 15

4.2 Location Requirements .............................................................................. 15

4.2.1 Installation Environment Requirements ............................................. 15

4.2.2 Carrier Requirements........................................................................ 16

4.2.3 Installation Angle Requirements ........................................................ 16

4.2.4 Installation Clearance Requirements ................................................. 17

4.3 Installation Tools......................................................................................... 20

4.4 Moving the Inverter .................................................................................... 21

V

4.4.1 Manual Transport ............................................................................. 21

4.4.2 Hoisting TTrraannssppoorrtt ........................................................................... 21

4.5 Dimensions of mounting-bracket................................................................ 22

4.6 PV Bracket-Mounted Installation................................................................. 23

4.6.1 Preparation before Mounting ............................................................ 23

4.6.2 Mounting Steps ................................................................................ 23

4.7 Wall-Mounted Installation ........................................................................... 25

4.7.1 Preparation before Mounting ............................................................ 25

4.7.2 Mounting Steps ................................................................................ 26

5 Electrical Connection ............................................................................... 29

5.1 Safety Instructions...................................................................................... 29

5.2 Terminal Description................................................................................... 29

5.3 Electrical Connection Overview .................................................................. 30

5.4 Additional Grounding Connection ............................................................... 32

5.4.1 Additional Grounding Requirements .................................................. 32

5.4.2 Connection Procedure ...................................................................... 33

5.5 AC Cable Connection ................................................................................. 34

5.5.1 AC Side Requirements ...................................................................... 34

5.5.2 Requirements for OT/DT Terminal ..................................................... 35

5.5.3 Aluminium Cable Requirements ........................................................ 35

5.5.4 Connection Procedure ...................................................................... 36

5.6 DC Cable Connection ................................................................................. 39

5.6.1 PV Input Configuration ...................................................................... 39

5.6.2 Connection Procedure ...................................................................... 40

5.6.3 Installing the PV Connectors ............................................................. 41

5.7 Communication Junction Box ..................................................................... 43

5.7.1 Remove the Junction Box ................................................................. 43

5.7.2 Install the Junction Box ..................................................................... 43

5.8 Communication Wiring Board ..................................................................... 44

5.9 RS485 Communication .............................................................................. 44

5.9.1 Interface Description......................................................................... 44

5.9.2 RS485 Communication System ........................................................ 45

5.9.3 Connection Procedure(Terminal Block) ............................................. 47

5.9.4 Connection Procedure (RJ45 network port) ...................................... 48

5.10 Dry Contact Connection ........................................................................... 50

5.10.1 Dry Contact Function ...................................................................... 50

5.10.2 Wiring Procedure............................................................................ 52

VI

5.11 DRM Connection ...................................................................................... 53

5.11.1 DRM Function ................................................................................ 53

5.11.2 Connection Procedure .................................................................... 53

5.12 Communication Module Connection (optional) ......................................... 55

6 Commissioning ........................................................................................... 56

6.1 Inspection before Commissioning............................................................... 56

6.2 Commissioning Procedure ......................................................................... 56

7 iSolarCloud APP ......................................................................................... 57

7.1 Brief Introduction........................................................................................ 57

7.2 Download and Install .................................................................................. 57

7.3 Login.......................................................................................................... 58

7.3.1 Requirements ................................................................................... 58

7.3.2 Login Steps ...................................................................................... 58

7.4 Function Overview ..................................................................................... 60

7.5 Home page ................................................................................................ 61

7.6 Running Information ................................................................................... 64

7.7 History Record ........................................................................................... 65

7.7.1 Fault Alarm Records ......................................................................... 66

7.7.2 Power Yields Records ....................................................................... 67

7.7.3 Event Records .................................................................................. 68

7.8 More .......................................................................................................... 68

7.8.1 Parameter Setting............................................................................. 69

7.8.2 Password Changing ......................................................................... 69

8 System Decommissioning ...................................................................... 71

8.1 Disconnecting the Inverter .......................................................................... 71

8.2 Dismantling the Inverter.............................................................................. 72

8.3 Disposal of the Inverter............................................................................... 72

9 Troubleshooting and Maintenance ...................................................... 73

9.1 Troubleshooting ......................................................................................... 73

9.2 Maintenance .............................................................................................. 83

9.2.1 Routine Maintenance........................................................................ 84

9.2.2 Maintenance Instruction ................................................................... 84

10 Appendix .................................................................................................... 87

10.1 Technical Data ......................................................................................... 87

10.2 Quality Assurance .................................................................................... 90

10.3 Contact Information ................................................................................. 91

VII

1

Safety

The inverter has been designed and tested strictly according to international safety

regulations. Read all safety instructions carefully prior to any work and observe them at

all times when working on or with the inverter.

Incorrect operation or work may cause:

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

• damage to the inverter and other property safety of the operator or a third party.

All detailed work-related safety warnings and notes will be specified at critical points in

this manual.

The safety instructions in this manual cannot cover all the precautions that

should be followed. Perform operations considering actual onsite conditions.

SUNGROW shall not be held liable for any damage caused by violation of the

safety instructions in this manual.

1.1 PV Panels

PV strings will produce electrical power when exposed to sunlight and can

cause a lethal voltage and an electric shock.

• Always keep in mind that the inverter is dual power supplied. Electrical

operators must wear proper personal protective equipment: helmet,
insulated footwear, glove, etc.

• Before touching the DC cables, operator must use a measuring device to

ensure that the cable is voltage-free.

• Must follow all warnings on the PV strings and in its manual.

1.2 Utility Grid

Please follow the regulations related to the utility grid.

1

1 Safety User Manual

All electrical connections must be in accordance with local and national

standards.

Only with the permission of the utility grid, the inverter can be connected to the

utility grid.

1.3 Inverter

Danger to life from electric shocks due to live voltage

• Do not open the enclosure at any time. Unauthorized opening will void

guarantee and warranty claims and in most cases terminate the operating
license.

Risk of inverter damage or personal injury

• Do not pull out the PV connectors when the inverter is running.

• Wait at least 5 minutes for the internal capacitors to discharge. Ensure that

there is no voltage or current before pulling any connector.

All safety instructions, warning labels, and nameplate on the inverter:

• Must be clearly legible.

• Should not be removed or covered.

Risk of burns due to hot components!

Do not touch any hot parts (such as heat sink) during operation. Only the DC

switch can safely be touched at any time.

2

User Manual 1 Safety

Only qualified personnel can perform the country setting.

• Unauthorized alteration of the country setting may cause a breach of the

type-certificate marking.

By touching the electronic components, you may damage the inverter. For

inverter handling, be sure to:

• avoid any unnecessary touching;and,

• wear a grounding wristband before touching any connectors.

WWaarrnniinngg LLaabbeell

LLaabbeell

DDeessccrriippttiioonn

Danger to life due to high voltages!

Only qualified personnel can open and service the inverter.

Disconnect the inverter from all the external power sources

before service!

Do not touch live parts until 5minutes after disconnection

from the power sources.

There is a danger from a hot surface that may exceed 60°C.

Check the user manual before service!

1.4 Skills of Qualified Personnel

All installations should be performed by qualified personnel. They should have:

• Training in the installation and commissioning of the electrical system, as well as the

dealing with hazards

• Knowledge of the manual and other related documents

• Knowledge of the local regulations and directives

3

2

Product Introduction

2.1 Intended Usage

SG30CX, SG33CX, SG40CX, SG50CX, a transformerless three-phase PV grid-

connected inverter, is an integral component in the PV power system.

The inverter is designed to convert the direct current power generated from the PV

modules into grid-compatible AC current and feeds the AC current to the utility grid. The
intended usage of the inverter is illustrated in "figure 2-1 Inverter application in PV power

system".

Inverter cannot connect the PV strings whose positive and negative terminals

need to be grounded.

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

ffiigguurree 22--11 Inverter application in PV power system

IItteemm

A

B Inverter

C

D Transformer

E

4

DDeessccrriippttiioonn

PV strings

Grid connection

cabinet

Utility grid

NNoottee

Monocrystalline silicon, polycrystalline silicon and

thin-film without grounding.

SG30CX, SG33CX, SG40CX, SG50CX.

Includes devices such as AC circuit breaker, SPD,

metering device.

Boost the low voltage from inverter to grid-

compatible medium voltage.

TN-C, TN-S, TN-C-S, TT, IT.

User Manual 2 Product Introduction

2.2 Product Introduction

2.2.1 Model Description

The device model description is as follows (Take SG30CX as an example):

MMooddeell

SG30CX 30000W

SG33CX 33000W

SG40CX 40000W

SG50CX 50000W

The device model can be found on the nameplate attached to the side of the inverter.
For details, refer to "3.2 Identifying the Inverter".

NNoommiinnaall OOuuttppuutt PPoowweerr NNoommiinnaall GGrriidd VVoollttaaggee

3 / N / PE，230 / 400V

5

2 Product Introduction User Manual

2.2.2 Appearance

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

NNoo.. NNaammee

1 LED indicator

panel

DDeessccrriippttiioonn

HMI interface to indicate the present working state of

the inverter.

2 Mounting ears 4, used to hang the inverter onto the mounting-bracket.

3

Side handles 2, used to move the inverter.

4 Labels Warning symbols, nameplate, and QR code.

5 Additional

2, use at least one of them to ground the inverter.

grounding

terminals

6 Bottom handles 2, used to move the inverter.

7

DC switches* To disconnect the DC current safely.

DC switches, AC terminals, DC terminals, and

8

Wiring area

communication terminals.

For details, refer to "5.2 Terminal Description".

*Devices for Australia and New Zealand are not equipped with DC switches.

6

User Manual 2 Product Introduction

2.2.3 Dimensions

ffiigguurree 22--22 Dimensions of the Inverter

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

TTyyppee DDiimmeennssiioonnss ((WW**HH**DD)) WWeeiigghhtt

SG30CX

SG33CX

SG40CX

SG50CX

702×595×310mm

782×645×310mm

50 kg

58 kg

62kg

2.2.4 LED Indicator Panel

As an HMI, the LED indicator panel on the front of the inverter can indicate the present

working state of the inverter.

table 2-1 LED indicator description

LLEEDD

iinnddiiccaattoorr

LLEEDD ssttaattee DDeeffiinniittiioonn

Steady Blue

Periodical flashing

blue(Period: 0.2s)

Periodical flashing

blue (Period: 2s)

Steady Red

Flashing Red

OFF

The device is connected to the grid and operating

normally.

The Bluetooth communication is connected and

there is data communication. No inverter fault

occurs.

The DC or AC side is powered on and the device

is in standby or startup state (not feeding power

into the gird).

A fault occurs and the device cannot connect to

the gird.

The Bluetooth communication is connected and

there is data communication. Fault occurs.

Both the AC and DC sides are powered down.

7

2 Product Introduction User Manual

2.2.5 DC Switch

The DC switch is used to disconnect the DC current safely whenever necessary.

The SG30CX and SG50CX sold in Australia and New Zealand are not equipped with DC

switch.

The SG33CX is equipped with one DC switch to control the connection and

disconnection of all DC terminals.

The SG40CX and SG50CX are equipped with two DC switches separately controlling a

group of DC inputs. The correspondence is as follows:

Turn the DC switches to the ON position before restarting the inverter.

Devices for Australia and New Zealand are not equipped with DC switches.

2.3 Circuit Diagram

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

different PV input conditions. The inversion circuit converts the DC power into AC power

and feeds the AC power into the utility grid through the AC terminal. The protection

circuit is equipped to ensure the safe operation of the device and personal safety.

The following figure shows the main circuit of the inverter.

2.4 Function Description

ffiigguurree 22--33 Circuit diagram

The inverter is equipped with the following functions:

8

User Manual 2 Product Introduction

CCoonnvveerrssiioonn ffuunnccttiioonn

The inverter converts the DC current into grid-compatible AC current and feeds the AC

current into the grid.

DDaattaa ssttoorraaggee

The inverter logs running information, error records, etc.

PPaarraammeetteerr sseettttiinngg

The inverter provides various settable parameters. Users can set parameters via the

APP to meet the requirements and optimize the performance.

The inverter is designed with standard RS485 communication interfaces and

communication accessory port.

• The standard RS485 communication interfaces are used to establish communication

connection with monitoring devices and upload monitoring data by using
communication cables.

• The communication accessory port is used to connect communication module

manufactured by SUNGROW, and upload monitoring data by means of wireless
communication.

The inverter can be connected to communication devices via either of the two

interfaces. After communication connection is established, users can view inverter

information or 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.

PPrrootteeccttiioonn FFuunnccttiioonn

The protective functions are integrated in the inverter, including anti-island protection,

LVRT/ZVRT, DC reversed polarity protection, AC short circuit protection, leakage current

protection, DC overvoltage/overcurrent protection, etc.

PPIIDD ffuunnccttiioonn

After the PID function is enabled, the voltage to ground of all PV modules is greater than

0, that is, the PV module-to-ground voltage is a positive value.

9

2 Product Introduction User Manual

• Before enabling the PID recovery function, make sure the voltage polarity of

the PV modules to ground meets requirement. If there are any questions,
contact the PV module manufacturer or read its corresponding user manual.

• If the voltage scheme for the PID protection/recovery function does not meet

the requirement of corresponding PV modules, the PID function will not work
as expected or even damage the PV modules.

• PID recovery function

When the inverter is not running, the PID module will apply inverse voltage to PV

modules, to restore the degraded modules.

• If the PID recovery function is enabled, it only works at night.

• After the PID recovery function is enabled, the voltage of the PV string to

ground is 500Vdc by default, and the default value can be modified
through the APP.

10

3

Unpacking and Storage

3.1 Unpacking and Inspection

The inverter is thoroughly tested and strictly inspected before delivery. Damage may still

occur during shipping. Conduct a thorough inspection after receiving the device.

• Check the packing for any visible damage.

• Check the inner contents for damage after unpacking.

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

Contact SUNGROW or the supplier in case there is any damage or incompleteness.

Do not dispose of the original packing case. It is recommended to store the inverter in it.

3.2 Identifying the Inverter

The nameplate can be found on both the inverter and the packing case. It provides

information on type of inverter, important specifications, marks of certification

institutions, and serial number which are available and identified by SUNGROW. Take

SG33CX as an example:

11

3 Unpacking and Storage User Manual

ffiigguurree 33--11 Nameplate of Inverters

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

IItteemm

1

DDeessccrriippttiioonn

SUNGROW logo and product type

2 Technical data of inverter

3

4

table 3-1 Description of Icons on the Nameplate

IIccoonn

Instructions and marks of conformity

Company name, website and country of manufacture

DDeessccrriippttiioonn

Do not dispose of the inverter together with household waste.

Refer to the corresponding instructions.

TÜV mark of conformity.

CGC-SOLAR mark of conformity.

12

CE mark of conformity.

User Manual 3 Unpacking and Storage

3.3 Scope of Delivery

a. The mounting-bracket includes 2 mounting-bracket components and 1 connecting

bar.

b. The SG30CX, SG33CX, SG40CX, SG50CX are respectively provided with 6, 6, 8, 10

pairs of DC connectors and cord end terminals.

c. The screws include 1 M4×25 screw, 3 M4×10 screws, and 2 M6×65 screws.

d. The documents include the quick installation guide, packing list, warranty card, etc.

3.4 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 -40°C and +70° C, 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.

ffiigguurree 33--22 Scope of Delivery

13

3 Unpacking and Storage User Manual

• The packing case should be upright.

• If the inverter has been stored more than half a year, the qualified personnel should

thoroughly check and test it before using.

14

4

Mechanical Mounting

4.1 Safety during Mounting

Make sure there is no electrical connection before installation.

In order to avoid electric shock or other injury, be sure there is no electricity or

plumbing installations before drilling holes.

Risk of injury due to improper handling

• Always follow the instructions when moving and positioning the inverter.

• Improper operation may cause injuries, serious wounds, or bruise.

System performance loss due to poor ventilation!

• Keep the heat sinks uncovered to ensure heat dissipation performance.

4.2 Location Requirements

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

outstanding performance.

• The inverter with IP 66 can be installed both indoors andoutdoors.

• Install the inverter in a place convenient for electrical connection, operation, and

maintenance.

4.2.1 Installation Environment Requirements

• The installation environment is free of inflammable or explosive materials.

• The location should be not accessible to children.

15

4 Mechanical Mounting User Manual

• The ambient temperature and relative humidity must meet the following

requirements.

• Prevent the inverter from direct exposure to sun, rain and snow.

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

• Never install the inverter in living areas. The inverter will generate noise during

operation, affecting daily life.

4.2.2 Carrier Requirements

The installation carrier should meet the following requirements:

4.2.3 Installation Angle Requirements

Inverter vertically or at a minimum back tilt of 10°. Forward installation or upside down

installation is prohibited.

16

User Manual 4 Mechanical Mounting

In case the installation site is a level surface, mount the inverter to the

horizontal-mounting bracket to meet the mounting angle requirements, as

shown in the figure below.

Take the following items into account when designing the bracket scheme:

• Consider onsite climate conditions and take anti-snow and anti-rain

measures if necessary.

• Ensure that the waterproof connectors are at least 300mm higher than the

ground surface. In case the inverter is applied in a floating power plant,
ensure that the waterproof connectors are at least 650mm higher than the
floating body surface.

• Bind the cables at the positions 300~350mm away from the DC connector,

AC waterproof terminal, and communication waterproof terminal.

• The various waterproof terminals should be tightened in accordance with

the torque requirements in this manual to ensure that they are tight and
sealed.

Contact SUNGORW if you have any question.

4.2.4 Installation Clearance Requirements

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

dissipation. (The fans are maintained on the left side of the inverter, and a larger
clearance is required.)

17

4 Mechanical Mounting User Manual

* The distance can be shortened to 200mm according to onsite conditions. In case

the distance is less than 600mm, move the inverter from the mounting-bracket or

wall before maintaining fans.

The distance between the bottom of the inverter and the ground surface is

determined according to the bending radius of the AC cable used and the

installation environment. In addition, the following conditions must be met:

– The distance between the bottom of the inverter and the ground

surface is not less 650mm.

– The AC cable is vertically led into the cabinet, and the straight length is

not less 200mm.

18

If there are any questions, please consult the AC cable manufacturer.

• In case of multiple inverters, reserve specific clearance between the inverters.

• In case of back-to-back installation, reserve specific clearance between the two

inverters.

User Manual 4 Mechanical Mounting

• Install the inverter at an appropriate height for ease of viewing LED indicators and

operating switches.

19

4 Mechanical Mounting User Manual

4.3 Installation Tools

Installation tools include but are not limited to the following recommended ones. If

necessary, use other auxiliary tools on site.

20

table 4-1 Tool specification

NNoo..

a

SSppeecciiffiiccaattiioonn

M2/M6

b M4/M6/M8

c

d

e

f

g

Drill bit: φ12, φ14

Includes sleeve with opening size 16mm

Opening:13mm, 16mm

Crimp range 4~6mm

Range≥1500Vdc

2

User Manual 4 Mechanical Mounting

4.4 Moving the Inverter

Move the inverter to the specified position before installation. The inverter can be moved

manually or via a hoist.

4.4.1 Manual Transport

Lift and move the inverter to the destination by using the side handles and bottom

handles.

Inappropriate moving operation may cause personal injury！

• It is recommended that at least two installers carry the inverter together and

wear protective equipment such as smash-proof shoes and gloves

• Always beware of the gravity center of the inverter and avoid tipping.

The ground surface on which the inverter is to be placed should be covered with

a sponge pad, foam cushion or the like to prevent the inverter bottom from

scratches.

4.4.2 Hoisting TTrraannssppoorrtt

step 1 Release the sealing screws on the mounting ears and store them properly. Anchor two

M12 thread lifting rings to the hangers of the inverter.

21

4 Mechanical Mounting User Manual

step 2 Lead the sling through the two lifting rings and fasten the tie-down strap.

step 3 Hoist the inverter, and stop to check for safety when the inverter is 100mm above the

ground. Continue hoisting the device to the destination after ensuring the safety.

step 4 Remove the lifting rings and reassemble the sealing screws released in Step 1.

Keep the inverter balanced throughout the hoisting process and avoid collisions

with walls or other objects.

Stop hoisting in the event of severe weather, such as heavy rain, thick fog, or

strong wind.

The lifting rings and the sling are not within the delivery scope.

-- -- EEnndd

4.5 Dimensions of mounting-bracket

Dimensions of the assembled mounting-bracket are as follows:

22

User Manual 4 Mechanical Mounting

ffiigguurree 44--11 Dimensions of mounting-bracket

4.6 PV Bracket-Mounted Installation

4.6.1 Preparation before Mounting

TToooollss

IItteemm

Phillips screwdriver/ electric

screw driver

Marker

Level

Hammer drill

Socket wrench

wrench

SSppaarree ppaarrttss

IItteemm

Grub screw

Bolt assembly

QQuuaannttiittyy SSppeecciiffiiccaattiioonn

2 M4×10

2 M6×65

4 M10

SSppeecciiffiiccaattiioonn

M4, M6

-

-

Drill bit: φ12

Including 16mm socket

Opening: 16mm

4.6.2 Mounting Steps

step 1 Assemble the mounting-bracket by using the connecting bar.

SSoouurrccee

Delivery scope

Delivery scope

Delivery scope

23

4 Mechanical Mounting User Manual

step 2 Level the assembled mounting-bracket by using the level, and mark the positions for

drilling holes on the PV bracket. Drill the holes by using a hammer drill.

step 3 Secure the mounting-bracket with bolts.

table 4-2 Fastening sequence

NNoo..

A

CCoommppoonneennttss DDeessccrriippttiioonn

Mounting-bracket

-

B Full threaded bolt M10*45

C Metal bracket

D Flat washer

E

Spring washer

F Hex nuts

-

-

-

-

step 4 Take out the inverter from the packing case.

24

User Manual 4 Mechanical Mounting

step 5 Hoist the inverter to the installation position when necessary (refer to "4.4.2 Hoisting

TTrraannssppoorrtt"). If the installation position is not high enough, skip performing this step.

step 6 Hang the inverter to the mounting-bracket and ensure that the mounting ears perfectly

engage with the mounting-bracket.

step 7 Fix the inverter with two M6×65 screws.

-- -- EEnndd

4.7 Wall-Mounted Installation

4.7.1 Preparation before Mounting

TToooollss

IItteemm

Phillips screwdriver/ electric

screw driver

Marker

Level

Hammer drill

Socket wrench

Wrench

SSppeecciiffiiccaattiioonn

M4, M6

-

-

Drill bit(Select according to expansion bolt

specifications)

Including 16mm socket

Opening: 16mm

25

4 Mechanical Mounting User Manual

SSppaarree ppaarrttss

IItteemm

Grub screw

Expansion bolts

QQuuaannttiittyy SSppeecciiffiiccaattiioonn

2 M4×10

2 M6×65

M10×95

4

(Recommended)

SSoouurrccee

Delivery scope

Delivery scope

Self-prepared

4.7.2 Mounting Steps

step 1 Assemble the mounting-bracket by using the connecting bar.

step 2 Level the assembled mounting-bracket by using the level, and mark the positions for

drilling holes on the installation site.

step 3 Insert the expansion bolts into the holes and secure them with a rubber hammer. Fasten

the nut with a wrench to expand the bolt. Remove the nut, spring washer, and flat
washer, and store them properly.

step 4 Fix the mounting-bracket with the expansion bolts.

26

User Manual 4 Mechanical Mounting

table 4-3 Fastening sequence

IItteemm

A Wall

B

C

DDeessiiggnnaattiioonn DDeessccrriippttiioonn

-

Expansion bolt

Fastening the bolt in the sequence of nut, spring washer,

slat washer

Mounting-

bracket

-

step 5 Take out the inverter from the packing case.

step 6 Hoist the inverter to the installation position when necessary (refer to "4.4.2 Hoisting

TTrraannssppoorrtt"). If the installation position is not high enough, skip performing this step.

step 7 Hang the inverter to the mounting-bracket and ensure that the mounting ears perfectly

engage with the mounting-bracket.

step 8 Fix the inverter with screws.

27

4 Mechanical Mounting User Manual

-- -- EEnndd

28

5

Electrical Connection

5.1 Safety Instructions

Prior to any electrical connections, keep in mind that the inverter has dual power

supplies. It is mandatory for the qualified personnel to wear personal protective

equipments (PPE) during the electrical work.

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

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

• Before starting electrical connections, disconnect the DC and AC circuit

breakers and prevent them from inadvertent reconnection.

• Ensure that all cables are voltage free before performing cable connection.

• Any improper operations during cable connection can cause device damage

or personal injury.

• Only qualified personnel can perform cable connection.

• All cables must be undamaged, firmly attached, properly insulated and

adequately dimensioned.

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

related to the utility grid.

• All electrical connections must be in accordance with local and national

standards.

• Only with the permission of the utility grid, the inverter can be connected to

the utility grid.

5.2 Terminal Description

Wiring terminals are at the bottom of the inverter, as shown in the figure below.

29

5 Electrical Connection User Manual

ffiigguurree 55--11 Wiring terminals

* Figure shown here is for reference only. The actual product you receive may differ！

IItteemm TTeerrmmiinnaall MMaarrkk NNoottee

MC4 PV connector

SG30CX, SG33CX: 6 pairs of terminals

A PV terminals + / -

SG40CX: 8 pairs of terminals

SG50CX: 10 pairs of terminals

COM1

B

Communicat-

ion terminal

COM2

COM3

COM4

For RS485 communication wiring.

For Communication module connection,

such as GPRS, WiFi, and E-Net

For digital input and output DI/DO wiring.

For DRM communication wiring.

Remove the protective case and use the

C

AC junction

box

—

Additional

D

grounding

terminal

junction box in the shipping accessory for

wiring.

2, use at least one of them to ground the

inverter.

5.3 Electrical Connection Overview

30

Electrical connection in the PV system includes additional grounding connection, AC

connection, and PV string connection.

User Manual 5 Electrical Connection

IItteemm

A

DDeessiiggnnaattiioonn

PV string

B Inverter

C Grid

D

Monitoring device

E ACcircuit breaker

table 5-1 Cable requirements

NNoo.. CCaabbllee

TTyyppee

PV cable

1 DC cable

complying with

1,500V standard

Additional

2

Groundin-

g cable

Outdoor single-

core copper wire

cable

Outdoor multi-

3 AC cable

core copper or

aluminium cable

Commun-

4

ication

cable

Shielded twisted

pair (terminal

block)

SSppeecciiffiiccaattiioonn

CCaabbllee

DDiiaammeetteerr

((mmmm))

CCrroossss--sseeccttiioonnaall aarreeaa

22

((mmmm

6~9 4~6

/

The same as that of the

PE wire in the AC cable

L1,L2,L3,N wire

(SG30CX, SG33CX):

16~35

L1,L2,L3,N wire

20~50

(SG40CX): 25~50

L1,L2,L3,N wire

(SG50CX): 35~70

PE wire: refer to Tab. 5-2

4.5~18 0.1~0.5

))

31

5 Electrical Connection User Manual

SSppeecciiffiiccaattiioonn

NNoo.. CCaabbllee

TTyyppee

CCaabbllee

DDiiaammeetteerr

((mmmm))

CCrroossss--sseeccttiioonnaall aarreeaa

22

((mmmm

))

CAT-5 Ethernet

cable (RJ45)

table 5-2 PE wire requirements

/

PPhhaassee wwiirree ccrroossss

sseeccttiioonn SS

16＜S≤35mm

S＞35 mm

2

2

PPEE wwiirree ccrroossss

sseeccttiioonn

2

16 mm

S/2

5.4 Additional Grounding Connection

Since the inverter is a transformerless inverter, neither the negative pole nor the

positive pole of the PV string can be grounded. Otherwise, the inverter will not

operate normally.

Connect the additional grounding terminal to the protective grounding point

before AC cable connection, PV cable 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 thoes terminals are

both grounded reliably.

NNoottee

The specifications are valid only

when the phase wire and PE wire

use the same material. If otherwise,

ensure that the cross section of the

PE wire produces a conductance

equivalent to that of the wire

specified in the table.

5.4.1 Additional 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 additional 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.

32

User Manual 5 Electrical Connection

5.4.2 Connection Procedure

step 1 Prepare the cable and OT/DT terminal.

1:Heat shrink tubing 2：OT/DT terminal

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.

-- -- EEnndd

The grounding screws have been anchored to the side of the inverter before

delivery, and do not need to be prepared.

There are two grounding terminals. Use at least one of them to ground the

inverter.

33

5 Electrical Connection User Manual

5.5 AC Cable Connection

5.5.1 AC Side Requirements

Before connecting the inverter to the grid, ensure the grid voltage and frequency
comply with requirements, for which, refer to "10.1 Technical Data". Otherwise, contact

the electric power company for help.

Connect the inverter to the grid only after getting an approval from the local

electric power company.

AACC CCiirrccuuiitt BBrreeaakkeerr

An independent four-pole circuit breaker is installed on the output side of the inverter to

ensure safe disconnection from the grid.

IInnvveerrtteerr

SG30CX

SG33CX 63A

SG40CX 80A

SG50CX 100A

If multiple inverters need to share a circuit breaker, the circuit breaker should be

selected according to the capacity.

Never connect a load between the inverter and the circuit breaker.

MMuullttiippllee IInnvveerrtteerrss iinn ppaarraalllleell CCoonnnneeccttiioonn

If multiple inverters are connected in parallel to the grid, ensure that the total number of

parallel inverters does not exceed 30. Otherwise, please contact SUNGROW for

technical scheme.

MMVV ttrraannssffoorrmmeerr

The MV transformer used together with the inverter should meet the following

requirements:

RReeccoommmmeennddeedd rraatteedd vvoollttaaggee

400V

RReeccoommmmeennddeedd rraatteedd

ccuurrrreenntt

63A

34

• The transformer may be a distribution transformer, and it must be designed for the

typical cyclical loads of a PV system (load in the day and no load at night).

• The transformer may be of the liquid-immersed type or dry type, and shield winding

is not necessary.

• The line-to-line voltage on the LV side of the transformer should endure the output

voltage of inverter. When the transformer is connected to to the IT grid, to-ground
withstanding voltage of the LV winding of the transformer, the AC cables, and the

User Manual 5 Electrical Connection

secondary equipment (including the relay protection device, detection & measuring
device, and other related auxiliary devices) should not be lower than 1,100V.

• The line-to-line voltage on the HV side of transformer should comply with local

power grid voltage.

• A transformer with a tap changer on the HV side is recommended in order to keep

consistent with the grid voltage.

• At an ambient temperature of 45℃, the transformer can run in 1.1 times of load for

long time.

• Transformer with a short-circuit impedance 6% (permissible tolerance: ±10%) is

recommended.

• The voltage drop of system cable is no more than 3%.

• The DC component that the transformer can withstand is 1% of the fundamental

current at rated power.

• For thermal rating, the load curve of the transformer and environment conditions

should be taken into account.

• The apparent power of the inverter should never exceed the power of the

transformer. The maximum AC current of all inverters connected in parallel must be
taken into account. If more than 30 inverters are connected to the grid, contact
SUNGROW.

• The transformer must be protected against overloading and short circuit.

• The transformer is an important part of grid-connected PV generation system. The

fault tolerance capacity of the transformer should be taken into account at all times.
The fault include: system short circuit, grounding fault, voltage drop, etc.

• Take ambient temperature, relative humidity, altitude, air quality, and other

environmental conditions into account when selecting and installing the transformer.

5.5.2 Requirements for OT/DT Terminal

OT/DT terminals (not included in the delivery scope) are required for fixing AC cables to

the terminal block. Purchase the OT/DT terminals according to the following

requirements.

• Specification: M8;

• Dimensions: a≤30mm / 8.4mm≤b≤10.5mm / c≤16mm

ffiigguurree 55--22 Dimensions of Terminal

5.5.3 Aluminium Cable Requirements

If an aluminium cable is selected, use a copper to aluminium adapter terminal to avoid

direct contact between the copper bar and the aluminium cable.

35

5 Electrical Connection User Manual

ffiigguurree 55--33 Aluminium cable terminal connection sequence

Ensure that the selected terminal can directly contact with the copper bar. If

there are any problems, contact the manufacturer of terminal.

Direct contact between the copper bar and the aluminium cable will cause

electrochemical corrosion and impair the reliability of electrical connection.

5.5.4 Connection Procedure

step 1 Disconnect the AC-side circuit breaker and prevent it from inadvertent reconnection.

step 2 Take out the AC junction box and loosen the swivel nut. Remove the seals and select an

appropriate one according to cable outer diameter. Lead the cable through the swivel
nut, seal, and junction box successively.

OOuutteerr ddiiaammeetteerr DD((mmmm))

20~25 a+b+c+d

25~30 a+b+c

30~40 a+b

40~50

SSeeaallss

a

36

User Manual 5 Electrical Connection

step 3 Strip the protection layer and insulation layer by specific length, as described in the

figure below.

step 4 Make the cable and crimp OT terminal.

step 5 Unfasten the buckle and remove the protective cap.

step 6 Secure the cable to corresponding terminals.

Observe the terminal layout on the block. Do not connect the phase wires to
"PE" terminal or PE wire to "N" terminal. Otherwise, unrecoverable damage to
the inverter may follow.

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5 Electrical Connection User Manual

Ensure that the depth L of the socket used is not less than 18mm.

step 7 Secure the junction box, fasten the buckle, and secure it with supplied M4×10 screw.

step 8 Gently pull the cable backwards to ensure firm connection, and fasten the swivel nut

clockwise.

38

User Manual 5 Electrical Connection

-- -- EEnndd

5.6 DC Cable Connection

Electric shock!

The PV array will generate lethal high voltage once exposed to sunlight.

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

inverter.

There is a risk of inverter damage! The following requirements should be met.

Failure to do so will void guarantee and warranty claims.

• Make sure the maximum voltage of each string is always less than 1100 V.

• The inverter enters the standby state when the input voltage ranges between

1,000V and 1,100V. The inverter returns to the running state once the
voltage returns to the MPPT operating voltage range, namely, 200 to 1,000V.

• Make sure the maximum short circuit current on the DC side is within the

permissible range.

5.6.1 PV Input Configuration

As shown in the figure below, the inverter is provided with multiple PV inputs: PV inputs

1~n (SG30/33/40/50CX: n=3/3/4/5); and each PV input is designed with an MPP

tracker.

Each PV input operates independently and has its own MPPT. In this way, string

structures of each PV input may differ from each other, including PV module type,

number of PV modules in each string, angle of tilt, and installation orientation.

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5 Electrical Connection User Manual

Each PV input area includes two DC inputs DC1 and DC2. For the best use of DC power,

DC1 and DC2 should be the same in PV string structure, including the type, number, tilt,

and orientation of the PV modules.

TTyyppee OOppeenn cciirrccuuiitt vvoollttaaggee lliimmiitt MMaaxx.. ccuurrrreenntt ffoorr iinnppuutt ccoonnnneeccttoorr

SG30CX 1100V 30A

SG33CX 1100V 30A

SG40CX 1100V 30A

SG50CX 1100V 30A

5.6.2 Connection Procedure

SUNGROW provides corresponding plug connectors in the scope of delivery for quick

connection of PV inputs.

DC cables should be connected to the inverter via PV connectors which are included in

the scope of delivery.

To ensure IP66 protection, use only the supplied connector or the connector

with the same ingress of protection.

High voltage may be present in the inverter!

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

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

40

User Manual 5 Electrical Connection

Use the MC4 DC terminal within the scope of delivery. Damage to the device

due to the use of incompatible terminal shall not be covered by the warranty.

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

step 2 Assemble the cable ends with the crimping pliers.

step 3 Lead the cable through cable gland, and insert 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.

The inverter will not function properly if any PV polarity is reversed.

-- -- EEnndd

5.6.3 Installing the PV Connectors

step 1 Rotate all the DC switches to "OFF" position.

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5 Electrical Connection User Manual

Skip performing step1 when the actual device is not equipped with DC
switches.

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 1,100V.

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

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

connectors to corresponding terminals only after ensuring polarity correctness.

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.

step 4 Follow the foregoing steps to connect PV connectors of other PV strings.

step 5 Seal the unused PV terminals with the terminal caps.

-- -- EEnndd

42

User Manual 5 Electrical Connection

5.7 Communication Junction Box

5.7.1 Remove the Junction Box

step 1 Pull out the pin and keep it properly, remove the junction box.

The pin removed is a required accessory for fixing the junction box. Store it
properly and protect it against missing or deformation.

-- -- EEnndd

5.7.2 Install the Junction Box

step 1 Remount the wiring box and press it tightly, insert the pin, and secure the wiring box with

the supplied M4×25 screw.

During installation, press the junction box forcibly to ensure that the pin can be

inserted successfully.

Never hit the pin with a heavy object, such a hammer. Otherwise, it will be

irrecoverably.

-- -- EEnndd

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5 Electrical Connection User Manual

5.8 Communication Wiring Board

The communication board of the inverter includes two layers. The upper layer

communication board mainly includes RS485 communication interfaces while

The lower layer communication board mainly includes DI/DO interface and DRM

interface.

5.9 RS485 Communication

5.9.1 Interface Description

As shown in the figure below, the inverter is equipped with three RS485 communication

interfaces and one dip switch.

All the three interfaces can be connected to a data acquisition device (Logger), to

achieve data exchange with PC or other monitoring devices.

The RS485-2 interface can only be applied to the application scenario of single inverter

communication.

44

User Manual 5 Electrical Connection

The RS485-1 terminal block and the RJ45 interface can be applied to applications

where multiple inverters communicate in a daisy-chain form.

A 120Ω resistor can be connected in parallel between RS485-1 A/B pins by configuring

the dip switch.

RS485-1 terminal block interface and RJ45 interface serve as the same

function with wiring manner different.

5.9.2 RS485 Communication System

SSiinnggllee--iinnvveerrtteerr ccoommmmuunniiccaattiioonn ssyysstteemm

In case of a single inverter, communication cable connection requires only one RS485

cable.

MMuullttii--iinnvveerrtteerr ccoommmmuunniiccaattiioonn ssyysstteemm

In case of multiple inverters, all the inverters can be connected via RS485 cables in the

daisy chain manner.

45

5 Electrical Connection User Manual

When more than 15 inverters are connected on the same daisy chain, the inverters on

two ends of the chain should be equipped with terminal resistors of 120Ω to ensure

communication quality by configuring the dip switch (SW1), and the shielding layer of

the communication cable should be single-point grounded.

46

ffiigguurree 55--44 Configuration of dip switch (N≥15)

The length of the RS485 cable should be no longer than 1,200m.

If multiple inverters are connected to the data collectorLogger3000, the

number of permissible daisy chains and the number of devices allowed to be

connected should meet the requirements (refer to the user manual for the

Logger3000).

User Manual 5 Electrical Connection

5.9.3 Connection Procedure(Terminal Block)

RS485 communication cables should be shielded twisted pair cables or

shielded twisted pair Ethernet cables.

There are three communication terminals, and the silkscreen marks are

COM1/COM3/COM4. Please choose according to the actual situation.

step 1 Remove the communication junction box, see "5.7.1 Remove the Junction Box".

step 2 Strip the protection layer and insulation layer by appropriate length.

step 3 Loosen the swivel nut of the junction box and select an appropriate seal according to

cable outer diameter. Lead the cable through the swivel nut, seal, and junction box
successively.

OOuutteerr ddiiaammeetteerr DD((mmmm))

4.5~6

SSeeaall

c

6~12 a+b

13~18 b

step 4 Secure the cable to the terminal base.

47

5 Electrical Connection User Manual

step 5 Insert the terminal base into the corresponding terminal.

table 5-3 Terminal definition

NNoo DDeeffiinniittiioonn

1

2

3

4

RS485 A IN, RS485A differential signal+

RS485 A OUT, RS485A communication signal+

RS485 B IN, RS485B differential signal-

RS485 B OUT, RS485B communication signal-

step 6 If other wiring operations need to be performed on the communication board, finish the

wiring operations before performing the following steps. If otherwise, continue to
perform the following steps.

step 7 Install the junction box, see "5.7.2 Install the Junction Box".

step 8 Pull the cable gently to make sure it is secured, tighten the swivel nut clockwise.

-- -- EEnndd

5.9.4 Connection Procedure (RJ45 network port)

step 1 Remove the communication junction box, see "5.7.1 Remove the Junction Box".

step 2 Loosen the swivel nut of the junction box and select an appropriate seal according to

cable outer diameter. Lead the cable through the swivel nut, seal, and junction box
successively.

48

User Manual 5 Electrical Connection

OOuutteerr ddiiaammeetteerr DD((mmmm))

4.5~6

SSeeaall

c

6~12 a+b

13~18 b

step 3 Strip the insulation layer of the Ethernet cable with a wire stripper, and insert the signal

wires to the RJ45 connector. Crimp the RJ45 connector with a crimping tool.

step 4 Insert the RJ45 connector to the RJ45 jack.

step 5 If other wiring operations need to be performed on the communication board, finish the

wiring operations before performing the following steps. If otherwise, continue to
perform the following steps.

49

5 Electrical Connection User Manual

step 6 Install the junction box, see "5.7.2 Install the Junction Box".

step 7 Pull the cable gently to make sure it is secured, tighten the swivel nut clockwise.

-- -- EEnndd

5.10 Dry Contact Connection

5.10.1 Dry Contact Function

The configuration circuit board is provided with fault output dry contact and emergency

stop dry contact, as shown in the figure below.

Connection method of the dry contacts is similar to that of the RS485 terminal block.

50

DDOO tteerrmmiinnaall ((ffaauulltt oouuttppuutt ddrryy ccoonnttaacctt)):: the relay can be set to fault alarm output, and

user can configure it to be a normal open contact (COM＆NO) or a normal close contact

(COM＆NC).

The relay is initially at the NC terminal, and it will trip to another contact when a fault

occurs.

Use LED indicators or other equipment to indicate whether the inverter is in the faulty

state. The following figures show the typical applications of normal open contact and

normal close contact:

User Manual 5 Electrical Connection

ffiigguurree 55--55 Normal open contact

ffiigguurree 55--66 Normal close contact

Devices connected to the relay should comply with related requirements:

AACC--SSiiddee RReeqquuiirreemmeennttss DDCC--SSiiddee RReeqquuiirreemmeennttss

Max. voltage: 250Vac

Max. current: 5A

Max. voltage: 30Vdc

Max. current: 5A

DDII tteerrmmiinnaall ((eemmeerrggeennccyy ssttoopp ddrryy ccoonnttaacctt)):: the dry contact can be configured to be an

emergency stop contact.

When the DI contact and GND contact are shorted by external controlled switch, the

inverter will immediately stop.

The dry contacts only support passive switch signal input.

The following figure shows the typical application of local stop dry contact.

51

5 Electrical Connection User Manual

ffiigguurree 55--77 Local stop contact

ffiigguurree 55--88 Daisy chain topology

• RS485 daisy chain in the master-slave mode

The inverter directly connected to the Logger is set to be the master inverter

by default, and it sends stop instruction to other inverters via RS485

communication.

Ensure that the impedance at the input node is less than 380Ω.

5.10.2 Wiring Procedure

Refer to the wiring of terminal block described in chapter 5.9.3 Connection Procedure

52

ffiigguurree 55--99 Master-salve mode

User Manual 5 Electrical Connection

5.11 DRM Connection

5.11.1 DRM Function

The inverter supports the demand response modes as specified in the standard AS/NZS

4777. The inverter has integrated a terminal for connecting to a DRED. After the

connection, the method of asserting DRMs as specified in Tab. 5-4.

The mode DRM0 is supported by the inverter.

table 5-4 Method of Asserting DRMs

MMooddee

DRM0

MMeetthhoodd ooff AAsssseerrttiinngg

Asserted by shorting pins 5 and 6

Asserted when the impedance between pins 5 and 6 is detected to be

above 20kΩ

The DRM function is only applicable to devices for Australia and New Zealand.

Enable the DRM function through the iSolarCloud APP. If there are any

problems, contact SUNGROW.

5.11.2 Connection Procedure

step 1 Remove the communication junction box, see "5.7.1 Remove the Junction Box".

step 2 Strip the insulation layer of the Ethernet cable with a wire stripper, and insert the signal

wires to the RJ45 connector. Crimp the RJ45 connector with a crimping tool.

53

5 Electrical Connection User Manual

step 3 Loosen the swivel nut of the junction box and select an appropriate seal according to

cable outer diameter. Lead the cable through the swivel nut, seal, and junction box
successively.

OOuutteerr ddiiaammeetteerr DD

((mmmm))

4.5~6

SSeeaall

c

6~12 a+b

13~18 b

step 4 Insert the RJ45 connector to the RJ45 jack.

step 5 If other wiring operations need to be performed on the communication board, finish the

wiring operations before performing the following steps. If otherwise, continue to
perform the following steps.

step 6 Install the junction box, see "5.7.2 Install the Junction Box".

step 7 Pull the cable gently to make sure it is secured, tighten the swivel nut clockwise.

54

User Manual 5 Electrical Connection

-- -- EEnndd

5.12 Communication Module Connection (optional)

Connect the communication module produced by SUNGROW, such as Eye, WiFi, or E-

Net to the communication accessory port. After successful connection, information

such as power generation and running state of the inverter can be viewed via the APP

on the phone.

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

The communication module and the RS485 communication are not available at

the same time. Otherwise, communication failure or other problems can be

caused.

For details on module installation and configuration, refer to the manual

delivered together with the module.

55

6

Commissioning

6.1 Inspection before Commissioning

Check the following items before starting the inverter:

• The inverter DC switch and external circuit breaker are disconnected.

• The inverter should be accessible for operation, maintenance and service.

• Nothing is left on the top of the inverter.

• The inverter is correctly connected to the external devices, and the cables are routed

in a safe place or protected against mechanical damage.

• The selection of the AC circuit breaker is in accordance with this manual and all

applicable local standards.

• All unused terminals at the bottom of the inverter are properly sealed.

• Warning signs & labels are suitably affixed and durable.

6.2 Commissioning Procedure

If all of the items mentioned above meet the requirements, proceed as follows to start

up the inverter for the first time.

step 1 Rotate the DC switch of the inverter to "ON" position.

Skip performing step1 when the actual device is not equipped with DC
switches.

step 2 Connect the AC switch (if applicable) between the inverter and the grid.

step 3 Connect the DC switch (if applicable) between the inverter and the PV string.

step 4 Set initial protection parameters via the iSolarCloud APP. For details, please refer

to“7.4.2 Login Steps”. If the irradiation and grid conditions meet requirements, the
inverter will normally operate.

step 5 Observe the LED indicator to ensure that the inverter operates normally. (Refer to Tab.

2-2LED indicator description).

-- -- EEnndd

56

7

iSolarCloud APP

7.1 Brief Introduction

The iSolarCloud APP can establish communication connection to the inverter via the

Bluetooth, thereby achieving near-end maintenance on the inverter. Users can use the

APP to view basic information, alarms, and events, set parameters, or download logs,

etc.

*In case the communication module Eye or WiFi is available, the iSolarCloud APP can

also establish communication connection to the inverter via the mobile data or WiFi,

thereby achieving remote maintenance on the inverter.

This manual describes only how to achieve near-end maintenance via the

Bluetooth connection. For remote maintenance through the Eye or WiFi, refer

to the related manuals in the delivery scope.

Screenshots in this manual are based on the Android system V2.1.6, and the

actual interfaces may differ.

7.2 Download and Install

MMeetthhoodd 11

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)

MMeetthhoodd 22

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.

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7 iSolarCloud APP User Manual

7.3 Login

7.3.1 Requirements

The following items should meet requirements:

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

• The mobile phone is within 5m away from the inverter and there are no obstructions

in between.

• The Bluetooth function of the mobile phone is enabled.

7.3.2 Login Steps

step 1 Open the APP to enter the login page, click on "Local Access" at the bottom of the page

to go to the next page.

step 2 Click on "Bluetooth", after which the Bluetooth search screen pops up automatically,

and select the to-be-connected inverter according the SN on the nameplate of the
inverter. The Bluetooth indicator gets on once the connection is established.

Alternatively, tap "
Bluetooth connection.

step 3 Enter the login screen after the Bluetooth connection is established.

" to scan the QR code on the side of the inverter to establish

ffiigguurree 77--11 Bluetooth connection

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User Manual 7 iSolarCloud APP

ffiigguurree 77--22 Login

The username is “user”，the initial password is "pw1111" which should be

changed for the consideration of account security.

To set inverter parameters related to grid protection and grid support, contact

SUNGROW to obtain the advanced account and corresponding password.

step 4 If the inverter is not initialized, you will enter the quick setting screen of initialize

protection parameter. After finishing setting on the quick setting screen, click “Boot”
and the device will be initialized. The APP will send start instructions and the device will
start and operate.

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7 iSolarCloud APP User Manual

ffiigguurree 77--33 Initialization protection parameter

Reset the protection parameters if the country setting is incorrect. Otherwise,
fault may occur.

In the European region, such as Netherlands, Sweden, Denmark, whose grid

code complies with EN50549, select the parameter EN50549_1 (LV grid-

connection) or EN50549_2 (MV grid-connection).

In the Brazilian region, set the country code to "Brazil". Selecting "Brazil_230"

or "Brazil_240" will cause setting failure.

step 5 If the inverter is initialized, the APP automatically turns to its home page.

-- -- EEnndd

7.4 Function Overview

The APP provides parameter viewing and setting functions, as shown in the following "-

figure 7-4 APP function tree map".

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User Manual 7 iSolarCloud APP

ffiigguurree 77--44 APP function tree map

7.5 Home page

After login, the home page is as follows:

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7 iSolarCloud APP User Manual

table 7-1 Home page description

NNoo..

DDeessiiggnnaattiioonn DDeessccrriippttiioonn

1 Date and time

2 Inverter state

3

PID function

state

4 Power flow chart

Power

5

6

generation

Real-time power Output power of the inverter

ffiigguurree 77--55 Home page

System date and time of the inverter

Present operation state of the inverter For details, refer

to Tab. 7-2Description of inverter state.

Present state of the PID function For details, refer to Tab.

7-3Description of PID function state

Display 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.

Today power yield and accumulative power yield of the

inverter

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User Manual 7 iSolarCloud APP

NNoo..

DDeessiiggnnaattiioonn DDeessccrriippttiioonn

Curve showing change of power between 5 am and 23

pm every day

7 Power curve

(Each point on the curve represents the percentage of

present inverter power to rated power)

8

table 7-2 Description of inverter state

SSttaattee

Navigation bar Including "Home", "Run-info", "His-record", and "More"

DDeessccrriippttiioonn

After being energized, inverter tracks the PV arrays’ maximum

Run

power point (MPP) and converts the DC power into AC power. This is

the normal operation mode.

Stop Inverter is stopped.

Inverter will stop operation by manually “stop” via app. In this way,

Key-stop

inverter internal DSP stops. To restart the inverter, manually start via

app.

Standby

Inverter enters standby mode when DC side input is insufficient. In

this mode inverter will wait within the standby duration.

Initial standby The inverter is in the initial power-on standby state.

Starting The inverter is initializing and synchronizing with the grid.

Warning Warning information is detected.

Derating

running

Scheduling

running

The inverter derates actively due to environmental factors such as

temperature or altitude

The inverter runs according to the scheduling instructions received

from the monitoring background

If a fault occurs, inverter will automatically stop operation, and

disconnect the AC relay. The fault information will be displayed in the

Fault

app. Once the fault is removed in recovery time, inverter will

automatically resume running.

table 7-3 Description of PID function state

SSttaattee

PID recovery

running

PID

abnormity

If the inverter is running abnormally, the alarm or fault icon

DDeessccrriippttiioonn

The inverters perform PID recovery actively.

It is detected that the ISO impedance is abnormal or the PID function

cannot work normally after the PID function enabled.

will be displayed in the

lower right corner of the inverter icon in power flow chart. The user can tap this icon to

enter the alarm or fault screen to view detailed information and corrective measures.

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7 iSolarCloud APP User Manual

7.6 Running Information

Tap " " on the navigation bar to enter the running information screen, as shown

in the following figure.

64

ffiigguurree 77--66 Running Information

The run information includes the PV information, inverter information, input and output

information.

table 7-4 Run information

CCllaassssiiffiiccaa--

ttiioonn

PV

Information

Inverter

Information

PPaarraammeetteerr

String n Voltage The input voltage of the n

String n Voltage The input current of the n

Total On-grid

Running Time

Daily On-grid

Running Time

Negative Voltage to

Ground

DDeessccrriippttiioonn

th

string

th

string

/

/

Inverter DC side negative to ground voltage

value

User Manual 7 iSolarCloud APP

CCllaassssiiffiiccaa--

ttiioonn

Input

Output

PPaarraammeetteerr

Bus Voltage

Internal Air

Temperature

Array Insulation

Resistance

DDeessccrriippttiioonn

Voltage between the positive and negative

poles of the DC side of the inverter

/

Insulation resistance value of the input side to

the protection ground

Country Information /

Power Limitation

/

Mode

Reactive Power

/

Mode

Total DC Power

MPPT x Voltage The input voltage of the x

MPPT x Current

DC side total input power

The input current of the x

th

MPPT

th

MPPT

Daily Yield /

Monthly Yield

Annual Yield

Total Active Power

Total Reactive

/

/

Current active power value of the inverter

Current reactive power value of the inverter

Power

Total Apparent

Current apparent power value of the inverter

Power

Total Power Factor Power factor of the AC side of the inverter

Gird Frenquency Frequency of the AC side of the inverter

A-B Line Voltage

Line VoltageB-C Line Voltage

C-A Line Voltage

Phase A Current

Phase CurrentPhase B Current

Phase C Current

7.7 History Record

Tap " " on the navigation bar to enter the history record screen, as shown in the

following figure.

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7 iSolarCloud APP User Manual

ffiigguurree 77--77 History record

On "history record" screen, users can check the alarm records, power yield records and

event records.

7.7.1 Fault Alarm Records

Tap " " to view fault and alarm records, as shown in the following figure.

66

ffiigguurree 77--88 Fault and alarm records

• Click " " to select a time segment and view corresponding records.

• The inverter can record up to 400 latest entries.

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

shown in following figure.

User Manual 7 iSolarCloud APP

ffiigguurree 77--99 Detailed fault alarm info

7.7.2 Power Yields Records

User can view various energy records: power curve, daily energy histogram, daily

energy histogram, monthly energy histogram, and annual energy histogram.

table 7-5 Explanation of power yields records

PPaarraammeetteerr

DDeessccrriippttiioonn

Show the power output from 5 am to 11 pm in a single day.

Power curve

Each point in the curve is the percentage of present power and

nominal power.

Daily energy

histogram

Monthly energy

histogram

Annual energy

histogram

Click the “

Shows the power output every day in the present month.

Shows the power output every month in a year.

Shows the power output every year.

” to view the power curve page as shown in following figure.

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7 iSolarCloud APP User Manual

Tap the time bar on the top of the screen to select a time segment and view

the corresponding power curve.

Swipe left to check the power yields histogram

7.7.3 Event Records

Click " " to view event record list.

• Click "

• The inverter can at most record the latest 400 events.

7.8 More

Tap " " on the navigation bar to enter the "More" screen, as shown in the following

figure.

ffiigguurree 77--1100 Power Curve

" to select a time segment and view corresponding event records.

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User Manual 7 iSolarCloud APP

ffiigguurree 77--1111 More

7.8.1 Parameter Setting

Tap " " to enter the parameter setting screen, as shown in the following figure.

Tap " " to enter the system parameter screen on which start/stop

instruction can be sent to the inverter and information such as ARM version and MDSP

version can be viewed.

7.8.2 Password Changing

Tap "" to enter the modify password screen, as shown in the following figure.

ffiigguurree 77--1122 Parameter setting

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7 iSolarCloud APP User Manual

ffiigguurree 77--1133 Change password

The new password should consist of 6 characters, a combination of letters and digits.

70

8

System Decommissioning

8.1 Disconnecting the Inverter

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

.

Skip performing step 2 when the actual device is not equipped with DC
switches.

step 3 Wait about 5 minutes until the capacitors inside the inverter completely discharge.

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

step 5 Insert a MC4 wrench into the notch and press the wrench with an appropriate force to

remove the DC connector.

step 6 Remove the AC junction box, ensure that the AC wiring terminals are voltage-free via a

multimeter, and remove the AC wires.

step 7 Install the MC4 waterproof plugs and AC waterproof cover.

For further disconnection and reconnection instructions, please visit the
webpage of respective component manufacturer.

-- -- EEnndd

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8 System Decommissioning User Manual

8.2 Dismantling the Inverter

Risk of burn injuries and electric shock!

• Do not touch any inner live parts until at least 5 minutes after disconnecting

the inverter from the utility grid and the PV input.

step 1 Refer to "5 Electrical Connection"for the inverter disconnection of all cables in reverse

steps.

step 2 Dismantle the inverter referring to "4 Mechanical Mounting"in reverse steps.

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

step 4 If the inverter will be reinstalled in the future, please refer to "3.4 Inverter Storage"for a

proper conservation.

-- -- EEnndd

8.3 Disposal of the Inverter

Users take the responsibility for the disposal of the inverter.

Some parts and devices of the inverter, such as the capacitors, may cause

environmental pollution.

Do not dispose of the product together with household waste but in accordance

with the disposal regulations for electronic waste applicable at the installation

site.

72

9

Troubleshooting and Maintenance

9.1 Troubleshooting

Once a fault occurs in the inverter, the fault information can be displayed on the APP

interface.

Fault codes and check methods are as follows:

FFaauulltt ccooddee

002

003

DDeessccrriippttiioonn

Grid overvoltage,

The grid voltage is

higher than the set

protection value

Grid transient

overvoltage,

The transient grid

voltage is higher than

the standard value.

CChheecckk mmeetthhoodd

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. Check whether the protection parameters

are appropriately set via the APP or the LCD.

3. Check whether the cross-sectional area

of the AC cable meets the requirement.

4. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

Generally, the inverter will be reconnected

to the grid after the grid returns to normal. If

the fault occurs repeatedly, contact

SUNGROW.

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9 Troubleshooting and Maintenance User Manual

FFaauulltt ccooddee

004

005

007

DDeessccrriippttiioonn

Grid undervoltage,

The grid voltage is

lower than the set

protection value

Grid low voltage,

The grid voltage is

lower than the set

protection value

AC instantaneous

overcurrent, AC output

current exceeds the

upper limit of the

inverter.

CChheecckk mmeetthhoodd

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.

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. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

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.

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. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

Generally, the inverter will be reconnected

to the grid after the grid returns to normal. If

the fault occurs repeatedly, contact

SUNGROW.

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User Manual 9 Troubleshooting and Maintenance

FFaauulltt ccooddee

008

009

010

011

DDeessccrriippttiioonn

Grid overfrequency,

Grid frequency

exceeds the upper limit

of the inverter.

Grid underfrequency,

Grid frequency is lower

than the lower limit of

the inverter.

Grid power outage, AC

switch or circuit is

disconnected.

Device anomaly

CChheecckk mmeetthhoodd

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 range.

2. Check whether the protection parameters

are appropriately set via the APP or the LCD.

3. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

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.

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. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

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 exists, contact SUNGROW.

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9 Troubleshooting and Maintenance User Manual

FFaauulltt ccooddee

012

013

014

015

DDeessccrriippttiioonn

Excessive leakage

current

Grid abnormal, the grid

voltage or frequency is

out of the permissible

range, and the inverter

cannot be connected

to the grid normally.

10-minute grid

overvoltage, the grid

voltage exceeds the

preset AC voltage of

the inverter for a long

time.

Grid overvoltage,

The grid voltage is

higher than the set

protection value

CChheecckk mmeetthhoodd

1. The fault can be caused by poor sunlight

or damp environment, and the inverter will

be reconnected to the grid after the

environment is improved.

2. If the environment is normal, check

whether the AC and DC cables are well

insulated.

3. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

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 parameter exceeds

the set value.

2. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

Wait for the inverter to return to normal.

If the fault occurs repeatedly, contact

SUNGROW.

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. Check whether the protection parameters

are appropriately set via the APP or the LCD.

3. Check whether the cross-sectional area

of the AC cable meets the requirement.

4. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

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User Manual 9 Troubleshooting and Maintenance

FFaauulltt ccooddee

016

017

019-020

021-022

024-025

030-034

DDeessccrriippttiioonn

Output overload, The

configured module

power is excessively

large and out of the

normal operation range

of the inverter.

Grid voltage unbalance,

the inverter detects

unbalanced three-

phase grid voltage

Device anomaly

Device anomaly

Device anomaly

CChheecckk mmeetthhoodd

Wait for the inverter to return to normal.

If the fault still exists, contact SUNGROW.

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

power company for solutions.

2. If the voltage difference between the

three phases is within the permissible range

of the local power company, modify the grid

voltage imbalance parameter through the

APP or LCD screen.

3. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

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 exists, contact SUNGROW.

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 exists, contact SUNGROW.

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 exists, contact SUNGROW.

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9 Troubleshooting and Maintenance User Manual

FFaauulltt ccooddee

036

037

038

039

DDeessccrriippttiioonn

Temperature anomaly,

The temperature of the

power module is

excessively high and

out of the safe range.

Temperature anomaly,

The temperature of the

interior of the inverter is

excessively high and

out of the safe range.

Device anomaly

Low system insulation

resistance, which is

generally caused by

poor insulation to

ground of the module/

cable or by rainy and

damp environment.

CChheecckk mmeetthhoodd

1. Check whether the inverter is directly

exposed to sunlight. If so, take some

shading measures.

2. Check and clean the air ducts.

3. Check whether there is 070 (fan

anomaly) alarm via the APP or the LCD. If so,

replace the fans.

1. Check whether the inverter is directly

exposed to sunlight. If so, take some

shading measures.

2. Check and clean the air ducts.

3. Check whether there is 070 (fan

anomaly) alarm via the APP or the LCD. If so,

replace the fans.

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 exists, contact SUNGROW.

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 and DC cable. Take correction

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. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

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User Manual 9 Troubleshooting and Maintenance

FFaauulltt ccooddee

040-042

DDeessccrriippttiioonn

Device anomaly

Low ambient

temperature, the

ambient temperature is

043

lower than the

temperature at which

the inverter can

operate normally.

044-046

Device anomaly

PV input configuration

047

abnormal, PV input

mode error

048-050

053-056

Device anomaly

059-060

070 Fan alarm

071 AC-side SPD alarm

072 DC-side SPD alarm

076

Device anomaly

CChheecckk mmeetthhoodd

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 exists, contact SUNGROW.

Stop and disconnect the inverter. Restart

the inverter when the ambient temperature

falls within the operation temperature range.

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 exists, contact SUNGROW.

Stop and disconnect the inverter. Reset the

input mode of the PV array.

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 exists, contact SUNGROW.

1. Check whether the fans operate normally

and are blocked by sundries. If they are

blocked, clear the sundries.

2. If a fan does not operate normally, stop

and disconnect the inverter to replace the

fan.

Check the SPD, and replace it if necessary.

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 exists, contact SUNGROW.

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9 Troubleshooting and Maintenance User Manual

FFaauulltt ccooddee

DDeessccrriippttiioonn

078-081 PVx abnormal

087

Electric arc detection

module abnormal

088 Electric arc fault

089

Electric arc detection

disabled

CChheecckk mmeetthhoodd

1. Check if the xth PV string needs to be

connected.

If not, ignore the alarm; and

If so, check the connection status and make

sure it is connected reliably.

2. Check if the xth DC fuse is damaged. If so,

replace the fuse.

3.If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

*The code 078 to code 081 are

corresponding to PV 1 to PV 4 respectively.

The inverter can operate normally.

1. Check whether the related cable

connection and terminals are abnormal, and

check whether the ambient environment is

abnormal. If so, remove the corresponding

abnormity.

2. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

1. Disconnect the DC inputs and check

whether DC cables are damaged, whether

the wiring terminals or fuses are loose or in

poor contact, and whether component parts

are burnt. If so, take corresponding

corrective measures.

2. After taking corresponding measures in

step 1, reconnect the DC inputs. Remove

the arc fault through the APP or LCD screen

so that the inverter will recover to be normal.

3. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

1. Enable the AFD function through the APP

or the LCD screen so that the inverter will

recover to be normal.

2. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

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User Manual 9 Troubleshooting and Maintenance

FFaauulltt ccooddee

DDeessccrriippttiioonn

Protection self-check

105

106

116-117

failure on grid side

Grounding cable fault

Device anomaly

220~227 PVx abnormal

448~471

String x reverse

connection fault

CChheecckk mmeetthhoodd

Restart the inverter or clear the fault through

the App.

If the fault still exists, contact SUNGROW.

1. Check whether the AC cable is correctly

connected.

2. Check whether the insulation between

the ground cable and the live wire is normal.

3. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

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 exists, contact SUNGROW.

1. Check if the xth PV string needs to be

connected.

If not, ignore the alarm; and

If so, check the connection status and make

sure it is connected reliably.

2. Check if the xth DC fuse is damaged. If so,

replace the fuse.

3.If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

*The code 220 to code 227 are

corresponding to PV 5 to PV 12 respectively.

1. Check whether the corresponding string

is of reverse polarity. If so, disconnect the

DC switch and adjust the polarity when the

solar radiation is low and the string current

drops below 0.5A.

2. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

*The code 448 to code 471 are

corresponding to string 1 to string 24

respectively.

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9 Troubleshooting and Maintenance User Manual

FFaauulltt ccooddee

532-547

548-563

564-571

580-587

DDeessccrriippttiioonn

String x reverse

connection alarm

String x output current

anomaly

String x reverse

connection alarm

String x output current

anomaly

CChheecckk mmeetthhoodd

1. Check whether the corresponding string

is of reverse polarity. If so, disconnect the

DC switch and adjust the polarity when the

solar radiation is low and the string current

drops below 0.5A.

2. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

*The code 532 to code 547 are

corresponding to string 1 to string 16

respectively.

1. Check whether the corresponding

module is sheltered. If so, remove the

shelter and ensure module cleanness.

2. Check the module for abnormal aging.

3. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

*The code 548 to code 563 are

corresponding to string 1 to string 16

respectively.

1. Check whether the corresponding string

is of reverse polarity. If so, disconnect the

DC switch and adjust the polarity when the

solar radiation is low and the string current

drops below 0.5A.

2. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

*The code 564 to code 571 are

corresponding to string 17 to string 24

respectively.

1. Check whether the corresponding

module is sheltered. If so, remove the

shelter and ensure module cleanness.

2. Check the module for abnormal aging.

3. If the fault is not caused by the foregoing

reasons and still exists, contact SUNGROW.

*The code 580 and 587 are corresponding

to string 17 and string 24 respectively.

82

User Manual 9 Troubleshooting and Maintenance

9.2 Maintenance

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

• Always keep in mind that the inverter is powered by dual sources: PV strings

and utility grid.

Before any service work, observe the following procedure.

• Disconnect the AC circuit breaker and then set the DC load-break switch of

the inverter to OFF;

• Wait at least 10 minutes for inner capacitors to discharge completely;

• Verify that there is no voltage or current before pulling any connector.

Keep non-related persons away!

A temporary warning sign or barrier must be posted to keep non-related

persons away while performing electrical connection and service work.

Restart the inverter only after removing the fault that impairs safety

performance.

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

arbitrarily replace any internal components.

For any maintenance need, please contact SUNGROW. Otherwise, SUNGROW

shall not be held liable for any damage caused.

83

9 Troubleshooting and Maintenance User Manual

9.2.1 Routine Maintenance

IItteemm MMeetthhoodd PPeerriioodd

Check the temperature and dust of

System clean

Fans

Cable entry

Electrical

Connection

the inverter. Clean the inverter

enclosure if necessary.

Check if the air inlet and outlet are

normal. Clean the air inlet and outlet,

if necessary.

Check whether there is fan warning

using APP.

Check whether there is any

abnormal noise when the fan is

turning.

Clean or replace the fans if

necessary (see the following

section).

Check whether the cable entry is

insufficiently sealed or the gap is

excessively large, and reseal the

entry when necessary.

Check whether all cable are firmly in

place.

Check whether a cable is damaged,

especially the part contacting the

metal enclosure.

Six months to a year (-

depend on the dust

contents in air.)

Once a year

Once a year

Six months to a year

9.2.2 Maintenance Instruction

CClleeaanniinngg AAiirr IInnlleett aanndd OOuuttlleett

A huge amount of heat is generated in the process of running the inverter. The inverter

adopts a controlled forced-air cooling method.

In order to maintain good ventilation, please check to make sure the air inlet and outlet

are not blocked.

Clean the air inlet and outlet with soft brush or vacuum cleaner if necessary.

84

User Manual 9 Troubleshooting and Maintenance

FFaann MMaaiinntteennaannccee

• Stop the inverter and disconnect it from all power supplies before

maintenance.

• Lethal voltage still exists in the inverter. Please wait for at least 5 minutes

and then perform maintenance work.

• Only qualified electricians can maintain the fans.

Fans inside the inverter are used to cool the inverter during operation. If the fans do not

operate normally, the inverter may not be cooled down and inverter efficiency may

decrease. Therefore, it is necessary to clean the dirty fans and replace the broken fans

in time.

The operation procedure is as follows:

step 1 Stop the inverter (see 8.1 Disconnecting the Inverter).

step 2 Loosen the screw on the sealing plate of the fan module.

step 3 Press the hump of the latch hook, unplug the cable connection joint outwards, and

loosen the screw on the fan holder.

step 4 Pull out the fan module, clean the fans with soft brush or vacuum cleaner, and replace

them when necessary.

85

9 Troubleshooting and Maintenance User Manual

step 5 Reinstall the fan back to the inverter in reverse order and restart the inverter.

-- -- EEnndd

86

10

Appendix

10.1 Technical Data

PPaarraammeetteerrss

IInnppuutt ((DDCC))

Max. PV input voltage 1100V

Min.PV input voltage/

Startup input voltage

Nominal input

voltage

MPP voltage range 200~1000V

MPP voltage range

for nominal power

No. of independent

MPP inputs

Max. number of PV

strings per MPPT

Max. PV input current

Max. current for input

connector

Max.DC Short-circuit

current

Max. inverter

backfeed current to

the array

OOuuttppuutt ((AACC))

AC output power

AC output power @

45 ℃, 400Vac

AC output power @

40 ℃, 400Vac

AC output power @

50 ℃, 415Vac

SSGG3300CCXX

((AAuussttrraalliiaa

OOnnllyy))

3 3 4 5

78A 78A 104A 130A

120A 120A 160A 200A

29.9kVA / /

/ 33kVA 40kVA 50kVA

/ 36.3kVA 44kVA 55kVA

/ 33kVA 40kVA 50kVA

SSGG3333CCXX SSGG4400CCXX SSGG5500CCXX

200V / 250V

585V

550~850V

2

30A

0A

Australia: max.

50 kVA

87

10 Appendix User Manual

SSGG3300CCXX

PPaarraammeetteerrss

((AAuussttrraalliiaa

SSGG3333CCXX SSGG4400CCXX SSGG5500CCXX

OOnnllyy))

AC output power @

45 ℃, 415Vac

Max. AC output

/ 36.3kVA 44kVA 55kVA

43.15A 55.2A 66.9A 83.6A

current

Max. inrush current (-

peak value /

duration)

Max. output fault

current (peak value /

duration)

Max. output over-

current protection

Nominal AC voltage

AC voltage range

[email protected]

8ms

[email protected]

ms

[email protected]@2.3-

4ms

[email protected]

[email protected]@1.25m-

[email protected]

148A 148A 159A 194A

3 / N / PE，230 / 400V

312~528V

s

Nominal grid

frequency/Grid

50Hz / 45~55Hz，60Hz / 55~65Hz

frequency range

Total harmonic

< 3 % (at nominal power)

distortion (THD)

DC current injection

Power factor

Adjustable power

0.8 leading – 0.8 lagging

<0.5%In

0.99

factor

Feed-in phases /

Connection phases

3/3

EEffffiicciieennccyy

Max. efficiency /

European efficiency

98.6% /

98.3%

98.6% /

98.3%

98.6% /

98.3%

98.7% /

98.4%

PPrrootteeccttiioonn

DC reverse

connection

Yes

protection

AC short-circuit

protection

Leakage current

protection

Yes

Yes

88

User Manual 10 Appendix

SSGG3300CCXX

PPaarraammeetteerrss

((AAuussttrraalliiaa

SSGG3333CCXX SSGG4400CCXX SSGG5500CCXX

OOnnllyy))

Grid monitoring

DC switch* / AC

No / No Yes / No Yes / No

Yes

Optional / No

switch

PV string current

monitoring

Q at night

PID recovery function

Overvoltage

DC Type II / AC Type II

Yes

Yes

Yes

protection

GGeenneerraall DDaattaa

Dimensions (W*H*D) 702×595×310mm 782×645×310mm

Weight

Isolation method

Degree of protection

Night power

consumption

Operating ambient

50kg 50kg 58kg 62kg

Transformerless

IP66

≤2 W

-30 to 60 ℃ (> 45 ℃ derating)

temperature range

Allowable relative

humidity range (non-

0 - 100%

condensing)

Cooling method

Max. operating

Smart forced air cooling

4000 m (> 3000 m derating)

altitude

Display

Communication

DC connection type

ACconnection type

RS485/ Wi-Fi(optional)/Ethernet(optional)

LED, Bluetooth + APP

MC4 (Max. 6 mm

2

)

OT or DT terminal (Max.70 mm

2

)

89

10 Appendix User Manual

SSGG3300CCXX

PPaarraammeetteerrss

Compliance

Grid Support

((AAuussttrraalliiaa

OOnnllyy))

IEC 62109,

IEC 61727,

IEC 62116,

IEC 60068,

IEC 61683,

VDE-AR-N

4105:2018,

VDE-AR-N

4110:2018,

IEC 61000-

6-3, EN

50438, AS/

NZS

4777.2:20-

15
Q atnight function, LVRT, HVRT, active & reactive power

control and power ramp rate control

SSGG3333CCXX SSGG4400CCXX SSGG5500CCXX

IEC 62109, IEC 61727, IEC 62116, IEC 60068,

IEC 61683, VDE-AR-N 4105:2018, VDE-AR-N

4110:2018, IEC 61000-6-3, EN 50549, AS /

NZS 4777.2:2015, CEI 0-21, VDE 0126-1-1 /

A1 VFR 2014, UTE C15-712-1:2013, DEWA

* Devices for Australia and New Zealand are not equipped with DC switches.

10.2 Quality Assurance

When product faults occur during the warranty period, SUNGROW will provide free

service or replace the product with a new one.

EEvviiddeennccee

During the warranty period, the customer shall provide the product purchase invoice

and date. In addition, the trademark on the product shall be undamaged and legible.

Otherwise, SUNGROW has the right to refuse to honor the quality guarantee.

CCoonnddiittiioonnss

• After replacement, unqualified products shall be processed by SUNGROW.

• The customer shall give SUNGROW a reasonable period to repair the faulty device.

EExxcclluussiioonn ooff LLiiaabbiilliittyy

In the following circumstances, SUNGROW has the right to refuse to honor the quality

guarantee:

• The free warranty period for the whole machine/components has expired.

• The device is damaged during transport.

90

• The device is incorrectly installed, refitted, or used.