Sungrow SG2K5-S, SG2K-S, SG3K-S, SG3K-D, SG5K-D User Manual

SG2_2.5_3_5_8K-UEN-Ver11 Version：1.1

User Manual

SG2K-S / SG2K5-S / SG3K-S /

SG3K-D / SG5K-D / SG8K-D

PV Grid-Connected

Inverter

I

About This Manual

The manual mainly describes t he product information, guidelines for installation,
operation and mai ntenance. The manual c annot include complete i nformation
about the phot ovoltaic (PV) system. You can get additional information ab out
other devices at www.sungrowpower.com or on the webpage of the respective
component manufacturer.

Applicability

This manual is applicable to the following inverter types:



SG2K-S



SG2K5-S



SG3K-S



SG3K-D



SG5K-D



SG8K-D

They will be ref erred to as “inverter” hereinafter unless otherwise specifi ed.

Target Group

This manual is intended for:



qualified personnel who are responsible for the installation and
commissioning of the inverter; and



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

How to Use This Manual

Read the m anual and other r ela ted docum ents bef ore any wor k on the inverter
is carried out. Documents must be stored carefully and be available at all times.

All rights to the content of this manual are owned by Sungrow Power Supply
Co., Ltd. (herei nafter “SUNGROW”). No part of thi s doc ument can b e modified,
distributed, reproduc ed or publis hed in any form or by any means wit hout prior
written per m ission from SUNGROW.

II

Contents may be periodical ly updated or revi sed due to product devel opment.
The informati on in this manual is subject to change without noti ce. The latest
manual can be ac quired at www.sungrowpower.com.

Symbols

Safety inst ructions will be highlighted with the following symbols.

Symbol

Explanation

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

avoided, will result in death or serious injury.

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

avoided, could result in death or serious injury.

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

avoided, could result in minor or moderate injury.

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

equipment or property damage.

Indicates additional information, emphasized contents or

tips that may be helpful, e.g. to help you solve problems or

save time.

III

Contents

About This Manu al ..................................................................... I

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

1.1 General Safety .......................................................................... 1

1.2 Inverter ...................................................................................... 2

1.3 Skills of Qualified Personnel ...................................................... 3

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

2.1 Intended Use ............................................................................. 4

2.2 Inverter ...................................................................................... 5

2.3 Energy Meter (optional) ............................................................. 7

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

2.4.1 Basic Function ........................................................................... 8

2.4.2 External Demand Response ...................................................... 9

2.4.3 Reactive Power Regulation ..................................................... 10

2.4.4 Power Quality Response ......................................................... 10

3 Unpa cki ng and S tor a ge .................................................... 11

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

3.2 Identifying the Inverter ............................................................. 12

3.3 Delivery Contents .................................................................... 13

3.4 Storage of Inverter ................................................................... 14

4 Mechanic al Mou nti ng ........................................................15

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

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

4.3 Tools ........................................................................................ 17

4.4 Installing the Inverter ............................................................... 19

4.5 Installing the Energy Meter ...................................................... 21

5 Electrical Conne ct i on .......................................................22

5.1 Terminal Description ................................................................ 23

5.2 Grounding the Inverter ............................................................ 24

IV

5.3 Grid Connection ....................................................................... 25

5.3.1 AC Side Requirements ............................................................ 25

5.3.2 Assembling the AC Connector ................................................. 26

5.3.3 Instal ling the AC Connect or ..................................................... 27

5.4 PV Connection ......................................................................... 28

5.4.1 PV Input Configuration ............................................................ 28

5.4.2 Assembling the PV Con nector ................................................. 31

5.4.3 Installing the PV Connector ..................................................... 32

5.5 RS485 Connection ................................................................... 33

5.6 Meter Connection..................................................................... 33

5.6.1 On the Meter Side ................................................................... 34

5.6.2 On the Inverter Side ................................................................ 36

5.7 DRM Connection to an External Device ................................... 37

6 Commissioning ................................................................. 39

6.1 Inspection before Commi ss ion ing ............................................ 39

6.2 Button Function ........................................................................ 39

6.3 Commissioning Procedure ....................................................... 40

7 LCD Operation ................................................................... 41

7.1 Button Function ........................................................................ 41

7.2 Main Screen ............................................................................. 41

7.3 Menu Structure ........................................................................ 43

7.4 Viewing Running Info ............................................................... 44

7.5 Advanced Settings ................................................................... 44

7.5.1 Inputt ing the Password ............................................................ 44

7.5.2 Setti ng P rotective Parameters ................................................. 44

7.5.3 Zero-e xport Setting ................................................................. 48

7.5.4 Adding the Existing Inverter ..................................................... 48

7.5.5 PF Setting ............................................................................... 48

7.5.6 Parameter Reset ..................................................................... 49

7.5.7 DRM Switch Setting ................................................................ 49

7.5.8 GND Detection ........................................................................ 49

7.5.9 Energy Adjustment .................................................................. 49

V

7.5.10 Setti ng C om munication Par am eter ........................................ 49

7.5.11 Ethernet Configuration ........................................................... 50

7.6 Starting/Stopping the Inverter .................................................. 50

7.7 Viewing the Error Record ........................................................ 50

7.8 Setting the T ime ...................................................................... 50

7.9 Setting the Country .................................................................. 51

7.10 Viewing Device Info ................................................................. 53

8 T r oubl es ho otin g and Ma int ena nc e ..................................54

8.1 Troubleshooting ....................................................................... 54

8.1.1 LED Indicator .......................................................................... 54

8.1.2 Errors on the App or LCD Screen ............................................ 54

8.2 Routine Maintenance .............................................................. 60

9 System Decomm i ssi oning ...............................................62

9.1 Disconnecting the Inverter ....................................................... 62

9.2 Dismantling the Inverter .......................................................... 63

9.3 Disposing of the Inverter ......................................................... 63

10 Appendix ............................................................................64

10.1 Technical Data ......................................................................... 64

10.1.1 –S Seri es ............................................................................... 64

10.1.2 –D Series .............................................................................. 66

10.2 Quality Assurance ................................................................... 68

1

1 Safety

The inverter has been designed and tested strictly according to international
safety regul ations. Read all safety i nstructions careful ly prior to any work and
observe them at all times when working on or with the invert er.

Incorrect operation or work may cause:



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



damage to the inver ter and other properties belonging to the operator or a
third party.

All detailed work -related safet y warnings and notes wi ll be specif ied at critical
points in this m anual.

1.1 General Safety

PV Panels

Please foll ow the safety instr uctions related to the PV strings.

Lethal voltage!
PV strings will produce elect rical power when exposed t o sunlight and

can cause a lethal voltage and an electric sho ck.
Only qualified personnel can perform the wiring of the PV panels.

Utility Grid

Please foll ow the regulations related to the utility grid.

All electrical connections must be in accordance with local and

national standards.
Only with the permission of the utility grid, the inverter can be

connected to the utility grid.

1 Safety User Manual

2

1.2 Inverter

There is a warning label on the inverter body.

Disconnect the inverter from all the external power sources

before service!

Do not touch live parts until 10 minutes after disconnection

from the power sources.

There is a danger from a hot surface that may exceed

60°C.

Danger to life due to high voltages!
Only qualified personnel can open and service the inverter.

Check the user manual before service!

Danger to life from electric shocks d ue to live voltage



Do not open the enclosure at any time. Unauthorized opening will void
guarantee and warranty claims and in most cases terminate the operating
license.



When the enclosure lid is removed, live components can be touched

which can result in death or serious injury due to electric shock.

Danger to life from electric shock du e to damaged inverter



Only operate the inverter when it is technically faultless and in a safe
state.



Operating a damaged i nverter can lead t o hazardous situat ions that can
result i n death or serious injuries due to electric s hock.

All the warning labels and nameplate on the inverter body

must be

clearly visib le and must not be removed, covered or pasted.

User Manual 1 Safety

3

Risk of inverter damage or personal injury
Do not pull out the PV connectors and AC connector when the inverter

is running. Disconnect the AC circuit breaker and set the DC load-break
switch o

f the inverter to OFF. Wait 10 minutes for the internal

capacitors to discharge. Verify that there is no voltage or current before
pulling any connector.

Risk of burns due to hot comp onents!
Do not touch any hot parts (such as heat sink) duri ng operation. Only

the buttons and the optional DC switch can safely be touched at an y
time.

Only qualified personnel can perform the country setting.
Unauthorized alter ation of the country setting may cause a breach of

the type-certificate marking.
Risk of inverter damage due to electrostatic discharge (ESD ).
By touching the el ectroni c components, yo u may damage t he invert er.

For inverter handli ng, be sure to:

 avoid any unnecessary touching; and
 wear a grounding wristband before touching any connectors.

1.3 Skills of Qualified Personnel

Qualified per sonnel must have the following skills :



training in the installation and commissioning of the electrical system, as well
as the dealing with hazards;



knowledge of the manual and other related documents; and



knowledge of the local regulations and directives.

4

2 Product Introduction

2.1 Intended Use

The inverter s, which are single-phase string inver ters without trans former, are
the crucial units between the PV strings and the utility grid in a PV power
system.

The inverter converts DC power from the PV array into grid-compliant AC power
and feeds it into the utility gri d.

Any use other than the intended use is not permitted.
The inverter m ust only be operated wit h PV strings of protection class

II in accordanc e wit h IEC 61730, applicati on clas s A. It is not permitted

for the positive pole or the negative pole of the PV strings to be

grounded. This can cause the inverter to be destroyed.
Damages to the pr oduct due t o a fault y or dam aged P V install ation ar e

not covered by warranty.

The intended use example is shown in Fig. 2-1.

A B C D

E

Export powerOutput powerPV power

Load power

Fig. 2-1 Application in a PV Power System

Item

Description

Remarks

A PV strings

Monocrystalline silicon, polycrystalline silicon

and thin-film without grounding.

B Inverter

SG2K-S, SG2K5-S, SG3K-S, SG3K-D,

SG5K-D and SG8K-D.

User Manual 2 Product Introduction

5

Item

Description

Remarks

C

Sungrow single-phase

or three-phase meter

(optional)

Measures the export power and communicates

with the inverter via an RS485 connection.

D

Utility grid

Grid earthing system types: TT, TN.

E

Household load

Devices that consume energy.

For the TT utility grid, the N line voltage to ground must be 30 V or less.

2.2 Inverter

Type Description

The type description is as foll ow s (take SG3K-S as an example):

SG 3K S

-

S: single MPPT, D: dual MPPTs
Code of power level
Code of PV grid-connected inverter

Tab. 2-1 Power Level Description

Appearance

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

Type

Nominal Output Power

Nominal Grid Voltage

SG2K-S

2000 W

230 Vac (single phase)

SG2K5-S 2500 W
SG3K-S 3000 W
SG3K-D 3000 W
SG5K-D 4990 W
SG8K-D 8000 W

2 Product Introduction User Manual

6

2

3

4

5

61

7

8

Fig. 2-2 Inverter Appearance (SG5K-D for reference)

Item

Name

Description

1 PV terminals

Positive and negative DC input connectors.

One or two or three pairs, depending on inverter

type.

2

DC switch (optional)

To disconnect the DC current safely.

3 RS485 terminal

To connect the communication module, suc h as

Wi-Fi module.

4

Meter | DRM
terminal

Connections to the energy meter and external

Demand Response Enabling Device (DRED).

5

Second PE terminal

For reliable grounding.

6

AC terminal

To feed power into the utility grid.

7 LCD panel

The display and two buttons can be used to

access current operating data or change inverter

settings.

8 Mounting rack

For mounting the inverter to the wall mounting
bracket.

Dimensions and Weight

W

D

H

Fig. 2-3 Dimensions of the Inverter

User Manual 2 Product Introduction

7

Tab. 2-2 Dimensions and Weight

Type

W (mm)

H (mm)

D (mm)

Weight (kg)

SG2K-S / SG2K5-S /

SG3K-S

300 370 125 8.5

SG3K-D / SG5K-D

360

390

133

11.5

SG8K-D

360

390

148

15.5

LCD Panel

The LCD panel with a s creen, an indicator and tw o buttons is on the front of t he
inverter.

31 2 2

Fig. 2-4 LCD Panel

No.

Name

Description

1

LCD
screen

Display and access current operating data or change inverter
settings.

2

Buttons

ESC / ENT.

View or set parameters

via the buttons. For detailed

functions, see Tab. 6-1.

3

Indicator

Green / red.

User can observe the colour and blinking frequency to get
the current state of the inverter. For detailed definition, see

Tab. 6-2.

2.3 Energy Meter (optional)

The SUNGROW Ener gy Met er is installed next t o the mai n s wi tc h t o detec t the
electrical measured values at the grid-connected point. It communicates with
the inverter via an RS485 connection. The dimensi ons are shown below.

2 Product Introduction User Manual

8

Front view Side view

18

65

117

35

45.3

Fig. 2-5 single-phase Meter Dimensions (unit: mm)

Back view Side view

72

85

45 27

45

35

Fig. 2-6 Three-phase Meter Dimensions (unit: mm)

 The single -phase Energy Meter and the three-phase E ner gy Meter

are alternati ve and delivered separatel y. The meter figures in this
document have been created for the single-phase Energy Meter
unless otherwise specified.

 More detailed i nf ormat i on on t h e Energy Meter can be found in the

respective Quick Installation Guide.

2.4 Function Description

2.4.1 Basic Function



Conversion function
The inverter converts DC power from the PV array into grid-compliant AC

power and feeds it into the utili ty grid.



Data storage
Inverter logs essential data including running information and error records.



Parameter configuration

User Manual 2 Product Introduction

9

Inverter provides various parameter configurations for optimal operation. You
can set the country via t he iSolarCloud App or the cloud server, in case you
require fur ther, please contact Sungrow.



Communicati on interface
You can choose the RS485 terminal for connecting a communication module

to the PV system, such as Wi-Fi module.

 It is recommended to use the communication module from

Sungrow. Using a

device from other companies may lead to

communicat ion failure or other unexpected damage.

 Further information on the communication module can be found in

the respective Quick Installati on G uide.



Earth fault alarm
If an earth faul t occ urs, the error code will be displayed o n the LCD s creen.

The buzzer inside the inverter wi ll beep to signal an external alarm.



Protective function
The protecti ve functions are integrated in the i nverter, including short c ircuit

protection, grounding insulation resistance surveillance, residual current
protection, anti-islanding protection, DC overvoltage / over-current protection,
etc.

2.4.2 External Demand Response

The inverter provides a RJ45 port for connecting to a demand response
enabling devi ce (DRED) . The DRED ass erts demand respond modes (DR Ms).
The inverter detects and initiates a response to the supported demand
response com mands within 2 s. The f ollowing table lis ts the DRMs support ed
by the invert er.

Tab. 2-3 Demand Respons e Modes (DRMs)

Mode

Explanation

DRM0

The inverter is in the state of standby.

DRM5

The export power to the grid is 0.

DRM6

The export power to the grid is no more than 50% of the rated power.

DRM7

The export power to the grid is no more than 75% of the rated power.

DRM8

The export power to the grid is 100% of the rated power, but subject
to the constraints from other active DRMs.

2 Product Introduction User Manual

10

2.4.3 Reactive Power Regulation

The inverter i s capable of opera ting in reac tive power r egulation modes for the
purpose of providing support to the grid. These various operating modes can be
enabled or disabled via the LCD menu.



PF: Fixed power factor mode.



Qt: Fixed reactive power mode.



Q(p): The PF of t he inverter output varies in response to the output power of
the inverter.



Q(u): The reac tive power output of the inverter var ies in response to t he grid
voltage.

2.4.4 Power Quality Respons e

The inverter supports two power quali ty response modes.



Power response for voltage variations

Define the res ponse curve with f our reference voltages , which can be set via
the LCD menu. The power output will vary in response to the voltage curve.
Refer to “7.5.2 Setting Protect ive Parameters” for detail s.



Power response for frequency variat ions

The inverter provides built -in over/under frequency protective threshold values.
Refer to “Tab. 7-7 Protective Parameters of Grid Standards” for details.
When the grid f requency is lower t han the under-f requency l imit or hi gher than
the over-frequency limit, the inverter will be disc onnected from the grid.

When there is an increase in grid frequency which exceeds 50.25 Hz, the
inverter wi ll r educe t he power output l inear ly w it h an incr eas e of freque nc y unti l
the end value (52.00 Hz) is reached.

11

3 Unpacking and Storage

3.1 Unpacking and Inspection

The inverter is thoroughly tested and strictly inspected before delivery. Damage
may still occ ur during shipping. Cond uct a thorough inspecti on after receiving
the device.

1. Check the pack aging for any visible damage.

2. Check the inner contents for damage after unpac king.

3. Check the delivery contents for completeness according to the
packaging list.

Contact SUNGROW or the distributor in case of any damaged or missing
components.

It is the best choic e to store the inverter in the origi nal packaging. So, do not
dispose of i t.

Fig. 3-1 Single Inverter Packaging

Inverter Type

W (mm)

H (mm)

D (mm)

SG2K-S / SG2K5-S / SG3K-S

500

235

375

SG3K-D / SG5K-D

530

235

435

SG8K-D

530

250

435

3 Unpacking and Storage User Manual

12

3.2 Identifying the Inverter

The nameplate clearly identifies the product. It is attached to the side of the
inverter.

1

2

4

工 作 温 度 范 围

型号

M od e l

S/ N

序列号

D C -I np ut

直流输入

最大输入电压

Min. MPP Voltage

最小 MPP 电压

Max. MPP Voltage

最大 MPP 电压

Max. Input Current

最大输入电流

Isc PV

最大短路电流

A C-Output

交流输出

额定输出电压
额定输出频率

Rated Output Power

额定输出功率

Max. Output Current

最大输出电流

Max. Apparent Power

最大视在功率

Power Factor Range

功率因数范围

安全等级
过压等级
防护等级

w ww. s un g ro w po w er. co m

S U N GR O W P O W E R S U P PL Y CO . ,L T D.

中 国 制 造

M ad e i n C h in a

阳 光 电 源 股 份 有 限 公 司

SG5K-D

D C

D C

D C

D C

II I[A C ], I I[ D C]

D C

A**********

Password

密码

********

600 V

90 V

560 V

20（10/10）A

24（12/12）A

230 V

50 Hz

AC 21.7 A

4.99 kW

4.99 kVA

I

IP65

-25℃…60℃

光 伏 并 网 逆 变 器

G R ID - C O N NE C T E D IN VE R T E R

0.8 Lead...0.8 Lag

Max. Input Voltage

Rated Output Voltage

Rated Output Frequency

Safety Class

Overvoltage Category

Enclosure

Ambient Temperature

P V

Fig. 3-2 Nameplate of Inverter

* The image shown her e is for referenc e only. The actual pro duct you rec eive
may differ.

Item

Description

Item

Description

1

SUNGROW logo and product

type

3

Marks of certification

institutions

2 Technical data 4

Barcode, company name and

origin

Tab. 3-1 Descri ption of Icons on the Nameplate

Icon

Description

Regulatory compliance mark.

Do not dispose of the inverter together with household waste.

The inverter does not have a transformer.

Refer to the corres pondi ng i nst ructions .

User Manual 3 Unpacking and Storage

13

Icon

Description

TÜV mark of conformity.

CE mark of conformity.

3.3 Delivery Contents

Standard Delivery

Inverter

Wall-mounting bracket

Communication connector

Documents

M4x80 screw set

b

PV connector set

b

AC connector set

Wi-Fi module

M4x10 grounding screw

c

a

Fig. 3-3 Delivery Contents

a) The inverter figures in this document have been created for SG5K-D

unless otherwise specified.

b) The documents include the Quick User Manual, quality certificates,

packaging lis t and product test reports.

c) One or tw o or three pairs, dependi ng on inverter type.

3 Unpacking and Storage User Manual

14

Optional Accessory

Single-phase meter

Three-phase meter



The single-phase Energy Meter and the three-phase Energy Meter are
optional. The meter figures in this document have been created for the
single-phase E nergy Meter unless otherwise specified.



The Energy Meter is not included in the i nverter packaging but, if ordered,
delivered separ ately.

3.4 Storage of Inverter

If you do not install the i nverter imm ediately, choose an appro priate l ocation t o
store it.



Store the inverter in the original packaging with the desiccant inside.



The storage t emperature should be alw ays between -30°C and +85°C, and
the storage relative humidity should be always between 0 and 100 %,
non-condensing.



When storing inverters, do not stack more than 8 inverter packages on top of
each other.



The packaging should be upright.

15

4 Mechanical Mounting

4.1 Safety during Mounting

Make sure ther e is no electrical connection before installati o n.
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 im proper handling

 The weight can cause injuries, serious wounds, or bruise.
 Always follow the instructions when moving

and positioning the

inverter.

System perfor mance loss due to bad ventilation!



The inverter requires good ventilation during operation. Keep it

upright and nothing co vering the heat sink.

Wear gloves to avoid scratches when mounting the inverter.

4.2 Location Requirements

The inverter with IP65 can be installed indoors or outdoors.
Selecting an optimal location for the inverter is critical for its operating safety as

well as the e xpected effi ciency and s ervice l ife. Considerations for the locat ion
include:

1. The structure should be capabl e of withstanding a f orce of four times the
weight of the inverter and be suitable f or the dimensions of the inverter.

2. Install the inverter where it is convenient for installation, cable connection
and service.

4 Mechanical Mou nt in g User Manual

16

3. Do not install the inverter in the living area or bedrooms. The noise
during its operation may affect daily l ife.

4. The location should be not accessible to children.

5. The ambient temperature and relative humidity should meet the following
requirements.

Max.
+60°C

Min.

-25°C

Max. RH
+100%

6. Only mount the inverter on a non-flammable surface or a wooden
structur e. Keep away from flamm able materials or gas. Do not enclose
the inverter into a tight confinem ent.

Enclosed cabinet

Flammable wall

Flammable material or

gas near the installation

7. The shaded side of the building woul d be better to preve nt the inverter
from exposure to the sun, rain, and s now.

8. Install at eye level for easy

inspection.

9. Install vertically for good heat

dissipation.

10. Never install the inverter horizontally, or with a forward tilt or with a
backward ti lt or even with upside down. T he horizontal installat ion can
result i n dam age to the inverter.

User Manual 4 Mechanical Mou nt in g

17

Forward tilt Backward tilt

Horizontally

Upside down

11. Clearance requirement and multiple installation:

400 mm 400 mm

400 mm

800 mm

For multi-r ow i ns tall ation, the di s tance bet we en two ad jac ent r ow s shoul d be at
least 400 mm.

4.3 Tools

General tools (recommended)

Packaging tape

Marker

Measuring tape

Level

Utility knife

Multimeter

Measurement range: ≥
1100Vdc

880.0

4 Mechanical Mou nt in g User Manual

18

Protecti ve clothing

Wrist st rap

Protecti ve gloves

Dust mask

Earplugs

Goggles

Insulated s hoes

Vacuum cleaner

Heat shrink tubing

Installation tools (recommended)

Heat gun

Hammer dril l

Drill bit: φ10

Rubber mallet
Electric screwdriver

Tool bit: M4

Phillips sc rewdriver

Specification: M4

Wire stripper

User Manual 4 Mechanical Mou nt in g

19

Hydraulic pl ier

Wire crim per
Crimping range:

2.5-6mm²

Wrench for MC4

terminal

Wire clipper

RJ11 crimping tool

Flat-blade screwdriver

M4

Torx screwdriver

TX30

Socket wrench

Open end:

10mm (for

M6 bolts)
13mm (for M8 bolts)
16mm (for M10 bolts)

4.4 Installing the Inverter

Inverter is installed on the wall by means of wall-mounting bracket and the
expansion plug sets.

The expansion plug set s hown below i s r ec ommended f or t he install ati on. They
are not incl uded in the delivery sc ope.

Stainless steel screw M6 Spring washerFender washerExpansion tube

4 Mechanical Mou nt in g User Manual

20

1. Align the wall mo unti ng brac k et

horizontally on t he wall with the
arrow upwards. M

ark the

position of the drill holes. Use
at least one hole on the right­and left-hand side of the wall
mounting bracket.

Tip: When mounting on a post,
use the upper and lower central
holes of the wall mounting
bracket.

2. Set the wall mounting bracket aside and drill the marked holes. The
depth of the holes should be about 70 mm. Install the wall-mounting
bracket.

Wall-mounting bracket

Fender washer

Spring washer

Self-tapping screw

Expansion tube

3. Mount the inverter to the bracket, and secure it with an M4x80 screw
(torque: 1.5 Nm).

User Manual 4 Mechanical Mou nt in g

21

4. To protect the inverter from
theft, you can lock it with a
padlock. The padlock is

purchased by the user if
necessary. The hole diameter
is about 8 mm.

5. Remove the waterproof lid from RS485 terminal and install the
communication module to the inverter. The following figure takes the
Wi-Fi module as an example. Refer to the manual delivered with the
module for details.

4.5 Installing the Energy Meter

The SUNGROW Energy Meter should be installed between the grid and the
load. It supports a 35 mm DIN-rail installation, as shown in the following figure.

Single-phase Energy Meter

Three-phase Energy Meter

Fig. 4-1 Installing the Meter to the Rail

22

5 Electrical Connection

Prior to any electrical connections, keep in mind that the inverter has dual
power supplies. It is mandatory for the technical personnel to wear personal
protecti ve equipments (PPE) duri ng the electrical w ork.

Danger to life due to a high voltage inside the inverter

 Make sure that the cables are not live before electrical connection.
 Do not turn on the AC circuit breaker until all the electrical

connections ar e completed.

Improper operation dur ing the wir ing process can caus e fatal injury to
the operators o r unrecoverable damage to the inverter.

Only qualified personnel can perform the wiring wor k.
All cables must be fi rm ly attached, undam age d, pr operly insulated and

adequately dim ensioned.

Comply with t he safety instructions relat ed to the PV strings and the
regulations relat ed to the utility grid.

All electrical connections must be in accordance with local and

national standards.
Only with the permission of the utility grid, the inverter can be

connected to the utility grid.

Electrical connections of the inverter include grounding, PV connection, AC
connection and communication c onnection.

User Manual 5 Electrical Connection

23

A

B

C

D

L

N

PE

PE

Fig. 5-1 Electrical Connection Diagram

Item

Name

Remarks

A PV strings

-S series: one pair of PV terminals.

-D series: three pairs for SG8K-D and two pairs for

other –D inverters.

B

Wi-Fi module

RS485 communication.

C

AC circuit

breaker

Used as a protective device during electrical

connection. User equips this device according to
the maximum output voltage and current.
The PE wire of the AC terminal must be directly
connected to the grounding bar. Do not connect it to

protection devices such as the circuit breaker.

D Utility grid

Nominal line-to-neutral voltage of the utility grid is

230 Vac.

5.1 Terminal Description

All elect rical terminals ar e located at the bottom of the inverter.

1 2

53

4

PV2

PV

2

PV1

PV1

Fig. 5-2 Terminal Description

5 Electrical Connection User Manual

24

* Image shown here is for r eference only. The actual product you r eceive may
differ.

Tab. 5-1 Terminal Descriptions

Item

Terminal

Description

1 PV terminals

MC4 terminals for PV inputs.

-S series: one pair of PV terminals.

-D series: t hree pairs for SG8K-D and two pairs

for other –D inverters.

2

RS485 terminal

To connect a Wi-Fi module.

3

Meter | DRM

terminal

The left hole is for meter communication and the

right is for DRED communication.

4

Second PE terminal

For reliable grounding.

5

AC terminal

The AC terminal to the utility grid.

5.2 Grounding the Inverter

All non-current carrying exposed metal parts of the equipment and other
enclosures in the PV power s ystem s hould b e ground ed, e.g. PV s tr ings frame
and inverter enclosure.

A second Protective Earth (PE) terminal is equipped at the bottom of the
inverter. Be sure to connect this PE terminal for reliabl e grounding and ensure
that the groun ding resistance is less than 10 Ohm.

Correct grounding connection of the second PE terminal and the AC
terminal is mandatory. Not properly connecting both PE will void any or
all product warranty.

Item

Description

A

Screw (M4×10 mm, 1.5 Nm)

B

Spring washer

C

Washer

D

Cable socket

E

Grounding cable

Fig. 5-3 Second PE Connection

User Manual 5 Electrical Connection

25

* The second PE conductor should be of the same cross-sectional area as the
original PE c onductor in the A C connec tor. The cable and cable soc ket are not
included in the delivery scope.

5.3 Grid Connection

The inverter is connected to the grid via 3 wires (L , N and PE).
Inverter is equipped with the waterproof direct plug-in connector which matches

the AC terminal at the bottom of the inverter.

5.3.1 AC Side Requirements

AC Circuit Breaker

An independent t wo-pole AC circui t br eak er for the inverter must be ins tall ed at
the output s ide f or saf e disconnection. The recommended speci fi c ati ons are as
follows:

Inverter Type

Specification

SG2K-S / SG2K5-S / SG3K-S / SG3K-D

25 A

SG5K-D

32 A

SG8K-D

50 A

In PV systems with multiple inverters, protect each inverter with a

separate circuit breaker. This will

prevent any residual voltage from

being present at the corresponding cable after disconnection.

Residual Current Device

With an integrated universal current-sensitive r esidual current monitoring unit
inside, the i nverter will disconnect immediately fr om the mains power as soon
as a fault c urrent with a value exceedi ng the limit has been detected.

However if an e xternal res idual c urrent device ( RCD) is mandatory, the switc h
must be triggered at a residual current of 300 mA or higher.

AC Cable Requirements

The recommended specifications are shown in the fol lowing table

5 Electrical Connection User Manual

26

Type

Cross-section (mm²)

Cable diameter (mm)

Range Recommended Range

Recommende

d

SG2K-S / SG2K5-S /

SG3K-S / SG3K-D

4…6 4 10…14 14

SG5K-D

4…6

6

10…14

14

SG8K-D

- 6 -

15

5.3.2 Assembling the AC Connector

1. Lead the AC cable t hrough the

cable gland and the housing.

2. Remove the cabl e jacket by

40 mm, and strip the wire
insulation by 8-15 mm.

8-15 mm

PE

L
N

40 mm

3. Fully insert the conductors to
the corresponding terminal

and tighten the screws with
the torque 0.8 Nm

. Pull
cables outward to check
whether they are firmly

installed.

Observe the terminal layout of AC connector. Do not connect the
phase lines to “PE” terminal, otherwise the inverter will not function
properly and the loss of any or all the warranty rights may follow.

4. Assemble the housing, the terminal block and cable gland. Make sure

that the rib of the terminal block and the groove on the housing
engage perfectly until a “Click” is heard or felt.

User Manual 5 Electrical Connection

27

5.3.3 Installing the AC Connector

1. Disconnect the AC circuit breaker and secure it agains t reconnection.

2. Measure the voltage and frequency of the grid-connected point to ensure
that they are wi thin the specified range listed in “10.1 Technical Data”.

3. Align the AC connector and the AC

terminal and mate them together by
hand.

Tighten the connector to the

terminal until a “Click” is heard or felt.

4. Connect the other ends. Connect “PE” conductor to the grounding
electrode. Connect “L” and “N” conductors to the AC circuit br eaker.

5. Pull all the lines outward to check whether they are fir m ly installed.

5 Electrical Connection User Manual

28

5.4 PV Connection

There is a ri sk of inverter damage! T he following r equirements should
be met. Fail ure to do so will void guarantee and warranty claims.

 Make sure that the maximum sho rt circuit current of each DC input is

less than inverter allowable limit.

 Make sure t hat the m axim um open v ol tage of each st r ing is l ess than

600 V. Voltage over 600 V can d am age the inverter.

 Make sure that the impedances between the posi tive terminal of the

PV string and Earth, and the impedances between the negative

terminal of the PV string and Earth are larger than 200 kΩ in any
case.

5.4.1 PV Input Configuration

-S Series

There is one input area with one MPP tracker. Only one input can be connected,
as shown in the following figure.

PV input

MPPT

Inverter inside

Type

Total PV Input
Power Limit

Open-circuit
Voltage Limit

Short-circuit
Current Limit

SG2K-S

3000 W

600 V

12 A

SG2K5-S

3200 W

600 V

12 A

SG3K-S

4000 W

600 V

12 A

-D Series

For –D inverter s except SG8K-D, there are two pairs of PV terminals, each with
its MPP tracker.

User Manual 5 Electrical Connection

29

The inverter SG8K-D has three pairs of PV terminals. The PV1 has an
independent MPP tracker. The PV2 has two pairs of PV terminals , which are
internal paralleled and with one MPP tracker.

The PV1 and PV2 c an be configured in inde pendent mode or parallel mode.

For SG8K-D, the PV strings to PV2 input

should have the same PV

module type, the same string length, identic

al tilt and identical

orientation.



Independent Mode

The two PV inputs wor k independently, each with its own MPPT. The two PV
inputs can be different from each other in PV module types, numbers of PV
panels in PV string, tilt angles and orientation angle of PV modules.

MPPT2MPPT1

Inverter Inside

PV input 1

PV input 2

Fig. 5-4 Independent Mode for –D inverters except SG8K-D

MPPT2MPPT1

Inverter Inside

PV input 1

PV input 2

Fig. 5-5 Independent Mode for SG8K-D

Only the current is limited for a single input and the power is not
limited.

Prior to connec ting the invert er to PV inputs, the spec ifications in t he following
table should be met:

5 Electrical Connection User Manual

30

Type

Total PV Input
Power Limit

Open-circuit
Voltage Limit
(PV1 / PV2)

Short-circuit
Current Limit
(PV1 / PV2)

SG3K-D

4000 W

600 V/600 V

12 A/12 A

SG5K-D

6500 W

600 V/600 V

12 A/12 A

SG8K-D

10400 W

600 V / 600 V / 600 V

15 A / 15 A / 15 A



Parallel Mode

All PV str ings should have t he same PV module t ype, the sam e string l ength,
identical tilt and identical orientation for optimum results.

PV input 1

PV input 2

MPPT

Inverter inside

Fig. 5-6 Parallel Mode for –D inverters except SG8K-D

PV input 1

PV input

2

MPPT

Inverter inside

Fig. 5-7 Parallel Mode for SG8K-D

Prior to connec ting the invert er to PV inputs, the spec ifications in the following
table should be met:

Type

Total PV Input
Power Limit

Open-circuit
Voltage Limit

Short-circuit
Current Limit

SG3K-D

4000 W

600 V

24 A

SG5K-D

6500 W

600 V

24 A

SG8K-D

10400 W

600 V

45 A

User Manual 5 Electrical Connection

31

To avoid the

input power unbalance of the two inputs or input

load-restriction, ensure the two PV input cables are of the same type.

5.4.2 Assembling the PV Connector

All PV cables are equipped wi th the water-proof direct plug-in connectors which
match the PV t erminals at the bottom of the inverter.

The PV cables mu st be multi-stranded wires.

To ensure the protection degree IP65, only use the connectors

delivered or connectors with the same degree of protection.

The requirements of PV cables are as follows.

Cross-section

Cable Diameter

Max. Withst and
Voltage

Max. Withst and
Current

4 mm2–6 mm2 6 mm–9 mm 600 V

Same with

short-circuit

current

Procedure:

1. Strip the insulation from the cables

by 7 mm.

7

mm

2. Assemble the cable ends

by crimping pliers.

Positive Crimp Contact

Negative Crimp Contact

3. Lead the cable throug h cable gl and, and ins ert into t he insul ator unti l it

snaps into place. Then tighten the cable gland (torque 2.5 Nm to 3
Nm).

Crimp Contact

Positive Insulator

Cable Gland

Crimp Contact

Negative Insulator

Cable Gland

4. Make sure that the cable polarity of each PV string is correct before

connecting i t to the inverter.

5 Electrical Connection User Manual

32

The inverter will not function properly if any PV polarity is reversed.
If the PV connectors are not assembled into place, it may cause an arc

or overheat. The loss caused by thi s issue will void the warranty.

5.4.3 Installing the PV Connector

Connect the inverter to PV strings ac cording to the foll ow ing procedure.

1. (Optional) If you purchase the DC switch, rotate it to “OFF”.

ON

OFF

2. Check the conn ection c able of the PV st ring for t he correct polarity and
that the open-c ircuit voltage does not exceed the invert er input limit of
600 V, even under the lowest operating temperature. Refer to the module
specification supplied by the module manufacturer for detailed
information.

480.0

.

0

The inverter will not function properly if any PV polarity is reversed.
Check the positive and negative polaritiy of the PV strings before

installation.

User Manual 5 Electrical Connection

33

3. Plug the positive and the negative PV connectors into corresponding
terminal unt il there is an audible click.

+

-

PV

+

-

-

+

PV

+

PV

-

PV

* The image shown her e is for referenc e only. The act ual product you receive
may differ.

4. (-D series) Seal the unused PV termi nals with the terminal caps.

5.5 RS485 Connection

For the Wi-Fi installation, see the last step in section “4.3 Installing the
Inverter”. More detailed infor mation on the RS485 c ommunic ation modul e can

be found in the r espective manual.

The RS485 terminal can also be used to connect an external RS485
device. For the pin def inition and waterproof procedure, pl ease contact
SUNGROW.

Failure to comply with t he requir ements of wiring or wat erproofing will
void the warran ty.

5.6 Meter Connection

The SUNGROW single-phase energy meter should be installed next to the
main switch.

Sungrow meter

Home Appliance

PV strings

A

Meter

link

Network

meter

Main

switch

Utility

grid

Solar switch

Inverter

5 Electrical Connection User Manual

34

5.6.1 On the Meter Side

For Single-phase Energy Meter

1. Take out the communication connector from inverter’s packaging, and
the meter (w ith 1-phase sensor) and cables from the meter’s packaging.

L

N

B

A

Power supply cable Meter RS485 cable

Communication connector

2. Unscrew t he swivel nut from the cabl e gland and rem ove the wat erpr oof
plug from the left inlet. Lead the A and B plugs from inside out through
the connector. This will result in the cable with the RJ45 plug on the
inside end, and the A and B plugs on the outside.

3. Connect the cables to the meter.

− (a) Tighten the

power supply

wires to terminal 3 (L) and
terminal 6 (N).

−

(b) Tighten the RS485 wires to

terminal 2 and terminal 5.

− (c) Place the 1-phase sensor
around the phase wire (L

) from

the main switch.
The CT clamp of 1-phas e sensor

can be placed b efore or after the
main switch.

N

Grid

Load

L

c

a

b

User Manual 5 Electrical Connection

35

Make sure that th e CT clamp of 1-phase sensor is installed in the right

direction: the arrow on the sensor must point away from the grid

towards the lo ad.

For Three-phase Energy Meter

1. Take out the communication connector from inverter’s packaging, and
the meter and RS485 cable from the meter’s packaging.

B

A

Meter RS485 cableCommunication connector

2. Unscrew t he swivel nut from the cabl e gland and rem ove the wat erpr oof
plug from the left inlet. Lead the A and B plugs from inside out through
the communic ation connec tor. This will res ult in the c able with the RJ 45
plug on the inside end, and the A and B plugs on the outside.

3. Connect the A and B plugs to terminals A and B on the Energy Meter, as
shown below.

AB

5 Electrical Connection User Manual

36

4. Strip the insulation from the power wires by 10 mm. Then connect the
wires to the terminals on the Energy Meter, as shown below.
(Cross-section: 10 mm

2

to 25 mm2)

OUT

IN

Load side

Grid side



The line c onduc tor L1 s uppli es power to t he Ener gy Met er. At least

the line conduc tor L1 and the neutral conductor must be connected
to the Energy Meter.

 Just connec t the l ine cond uct or L1 and t he ne utral conduc tor, then

the three-phase Energy Meter can be used as a single-phase
meter.

5.6.2 On the Inverter Side

Proceed as follows to connect the RS485 wires to the inver ter.

1. Loosen the screws and
remove the waterproof lid

from the RS485|DRM
terminal.

Note:
Retain the screws for later

installation.

User Manual 5 Electrical Connection

37

2. Insert the RJ45 plug into the
left (Meter) port until it

makes a clicking sound.

3. If no external demand
response enabling device
connected, secure the

waterproof l id t o the i nver ter
bottom with four screws and
then fasten t he cable gland.

5.7 DRM Connection to an External Device

The cable for connecting to the DRED is not included in the delivery.
Use a TIA/EIA 568B standard network cable with a diameter of 3 mm

–5.3 mm.

1. Take out the communication
connector from the

packaging, as s hown on t he
right.

2. Loosen the screws and
remove the waterproof lid

from the RS485|DRM

terminal.
Note:
Retain the screws for later

installation.

5 Electrical Connection User Manual

38

3. Unscrew t he swivel nut from the cabl e gland and rem ove the wat erpr oof
plug from the right inlet. Lead the c abl e thr ough the c abl e gland t hen the
right inlet.

4. Use the Ethernet crimper to crimp the cable and carefully push all 8
unstripped c olored wires into t he RJ45 plug accor ding to TIA/EIA 568B
standard, as shown below.

Corresponding Relationship Between
Cables and Pins

:

Pin 1: White-orange; Pin

2: Orange;

Pin 3:

White-green;

Pin 4: Blue;

Pin

5: White

-blue;

Pin 6:

Green;

Pin 7: White-brown; Pin 8: Brown.

RJ45 Port

RJ45 plug

4

0000;

5. Insert the RJ45 plug into the

right port (DRM)

until it

makes a clicking sound.

6. Secure the water proof lid to

the inverter bot t om wi th f our
screws and then fasten the
cable gland.

7.

Connect the other end to

the external d evice.

39

6 Commissioning

Proper commissioning is essential for the system, to protect it against fires,
injury and elec tric shock.

6.1 Inspection before Commissioning

Check the following items before s tarting the inverter:

1. All the installation sites are convenie nt for operation, maintena nce and
service.

2. Check and confirm that the invert er is firmly installed.

3. Space for ventilation is sufficient for one inverter or multiple inverters.

4. Nothing is l eft on the top of the inverter or battery pack.

5. The inverter and accessories are correctly connected.

6. Cables are routed in a safe place or protected against mechanical
damage.

7. The selecti on of the AC circ uit breaker is in ac cordance to this manual
and all applicable local standards.

8. All unused ter m inals at the bottom of the inverter are proper ly sealed.

9. Warning signs and label s are suitably affixed and durable.

6.2 Button Function

Inverter offer s two but tons wit h multipl e functi ons. Pleas e refer to t he followi ng
table before any o peration of the inverter.

Tab. 6-1 Butt on functi on

Button

Operation

Description

ESC

≤1.2 s

Navigate up / down or change the setting values.
Hereinafter referred to as “Touch ESC”.

＞1.2 s

Return to a previous menu or cancel the settings.
Hereinafter referred to as “Press ESC”.

ENT

≤1.2 s

Move left or right, or turn pages, or view the active

error/warning from the main screen.

Hereinafter referred to as “Touch ENT”.

＞1.2 s

Enter the sub-menu or confirm a selection or settings.
Hereinafter referred to as “Press ENT”.

6 Commissioning User Manual

40

6.3 Commissioning Procedure

Make sure all the above mentioned item s meet the requirements.

1. Connect the external AC circuit breaker.

2. Rotate the optional DC switch to “ON”.

3. If ther e is s ufficient sunl ight, the inverter will enter the runni ng state an d
start to feed A C power to the grid. The LCD screen will be activat ed 5s
later.

Pac:

Status:

3456W

Running

Startup

80%

3456W

Standby

Pac:
Status:

4. Observe the status of the indicator.

Tab. 6-2 Indicator Status Description

Status

Description

Green

Steady on.

The inverter is running norm ally, or with a

warning, or with power limitation.

Inverter status: Running, DRMx.

Flash once every 1s.

The inverter is in the status of standby,
startup or Turn off (via LCD menu).

Red

Steady on.

Inverter faults.

Flash quickly every

0.2s.

Grid faults.

Flash slowly every 1s.

PV faults.

Indicator lights of the communication module are described in the respective
manual.

5. Visit www.isolarcloud.com or iSolarCloud App to view inverter
information. More detailed information on the indicator of the
communicat ion module can be found in the respective Quick Guide.

41

7 LCD Operation

7.1 Button Function

The inverter offers two buttons with multiple functions. Please refer to the
following table before any operati on of the inverter.

Tab. 7-1 Butt on functi on

Button

Operation

Description

ESC

≤1.2 s

Navigate up / down or change the setting values.
Hereinafter referred to as “Touch ESC”.

＞1.2 s

Return to a previous menu or cancel the settings.
Hereinafter referred to as “Press ESC”.

ENT

≤1.2 s

Move left or right, or turn pages, or view the active

error/warning from the main screen.

Hereinafter referred to as “Touch ENT”.

＞1.2 s

Enter the sub-menu or confirm a selection or settings.
Hereinafter referred to as “Press ENT”.

Risk of burns due to hot comp onents!
Do not touch any hot parts (such as heat sink) during operation. Only

the buttons and the optional DC switch can safely be touched at an y
time.

7.2 Main Screen

After successful commissioning, the LCD screen will enter the main screen.

Pac

:

Status:

3456W

Running

Inverter power
Inverter status

If there is no button operation for:

 1 minute, LC D backlight will be automatically deacti vated;
 2 minutes , system will return to the default menu (mai n screen).

7 LCD Operation User Manual

42

When there is no button operation for more than 8 seconds on the main screen,
the displaye d information wi ll automati cally cycle t hrough to provide addi tional
data: Main screen, energy, PV data, utility grid data. The screen will cycle every
2 seconds. Press any button to quit this mode.

E

-total: 1999kWh

E-today: 20.0kWh

Ipv

: 2.9A

Grid Vtg:

Grid Frq:

221.7V

50.0Hz

Vpv: 250.0V

Pac

:

Status:

3456

W

Running

* The images shown here are for your reference only. For –D series, all PV
input inform ation will be displayed.

Tab. 7-2 Status Description

State

Description

Standby

The inverter waits for sufficient sunlight, then the DC voltage
recovers.

Startup The inverter is initializing and synchronizing with the grid.

Running

After being energized, the inverter tracks the PV strings’

maximum power point (MPP) and feeds the AC power to grid.

This mode is the normal mode.

DRMx

The inverter is connected to an external demand response

enabling devic e and the DRM switch is set to ON via the LCD

menu.

Turn off

The inverter will stop running by manual “OFF” via the LCD

menu or with the DRM0 command from external DRED. Set to

“ON” if you want to restart the inverter.

Upgrading The DSP or LCD firmware is upgrading.

Error xxx

If an error occurs, the inverter will automatically stop operation,

trigger the AC relay and show “Error xxx” on the LCD with the
indicator red (xxx is the error code).
Once the error is cleared in recovery time, the inverter will
automatically try to resume normal operation. The recovery

time can be set via the App.

If the device is in standby mode for more than 10 minutes, please
check:

 Whether the i nsolation is sufficient and the PV connection is correct.
 If no anomaly is found, di sconnect and reconn ect the DC swi tch and

the main swit ch to restart.

 If it still does not wor k, contact SUNGROW.

User Manual 7 LCD Operation

43

Viewing the Active Error/Warning

If the status on t he main sc reen is “Error xxx”,

Touch ENT to vi ew the active error code.
If the inverter is running with a warning, Touch

ENT to view the active warning code.
Only one error or warning can be displayed on

this screen. Refer to “8.1 Troubleshooting”
for a solut ion.

Error

010

Warning

514

or

7.3 Menu Structure

For the running i nformatio n, the power valu e indicated r epresents the aver age
value during t he time interval.

The energy yields displayed are indicative only. For the actual yields, please
refer to the energy meter of electric utility company.

Run Info

Settings

Time

Country

Error Record

Grid Prot. Param

Main Menu

Zero-export

Password: 111

Device Info

ON/OFF

Existing Inverter

Password: 111

DRM Switch

Param Reset

Energy Adj.

GND Detect

Comm. Param

Ethernet Config

PF

* Reserved

Fig. 7-1 LCD Menu Tree

7 LCD Operation User Manual

44

7.4 Viewing Running Info

Proceed as follows to look through the detailed running information.

Main Screen ( P ress ENT)→Menu→Run Info (Press ENT)

Scroll pages by touching ENT / ESC.

E-

total

: 1999

kWh

E

-

today:

20

.

0

kWh

Ipv1

: 2

.

9A

Grid Vtg

:

Grid Frq:

221.

7

V

50

.

0

Hz

Vpv

1:

250

.0

V

Ipv2:

2.

6

A

Vpv2:

244

.

4V

Pac

:

Iac

:

1338.5W

6.0A

Meter Power:

2210W

P

max

Limit:

100%

Meter power:
+ (omitted): The inverter is sourcing power to the grid.

-: The inverter is sinking power from the grid.
P

max

limit: only indicated for the derating in the event of over-temperature,

overvoltage or over-frequency.

7.5 Advanced Settings

7.5.1 Inputting the Password

The parameter s ettings are prot ected with a password. If you want to set t he
inverter’s parameters, you hav e to input the correc t password.

Main Screen (P ress ENT)→Menu (Touch ESC)→Settings ( P ress ENT)

Touch ESC to add the value and
Touch ENT to move the cursor.

Input the password 111.

Password: 1 1 1

Press ENT to confirm the password and enter the submenu.

Touch ESC to navigate down and Press ENT to confirm.

Grid Prot. Param

Param Reset
DRM Switch

Zero-export

PF

Energy Adj.

Ethernet Config

Comm. Param GND Detect

Existing Inverter

7.5.2 Setting Protective Parameters

Protective parameters are designed for the threshold values that can trigger the
protecti ve function of the inver ter. The thr eshold values are compli ant with the
requirements of local safety standar ds and the utility grid.

User Manual 7 LCD Operation

45

If the protection func tion is triggered, the inverter wi ll automatical ly disconnect
from the grid with the ”Error xxx” state displayed on t he LCD main sc reen. After
the grid voltage or f requency recovers to the specified range, t he inverter will
start running norm ally and can reconnect t o the grid.

Touch ESC to choose the item and press ENT to enter the setting i nterface.

Volt-watt

Single/Mul Prot.
Prot. Recover

Grid Prot. Adj.10 Min Over Vtg En.

Single/Multiple Protection

Touch ESC to change the value and touch ENT to move the cursor.

Confirm settings by pressing ENT.

Confirm settings and scroll pages by pressing ENT.

2

-Vmax:

265.0V

2-

Vmin: 180

.0V

1-Vmax: 260.0V

1-Vmin: 180.0V

Multi. stage

Single

stage

Vmin:

180.

0

V

Vmax

: 260.

0V

Tab. 7-3 Protective Parameters and the Range

Parameter

Explanation

Range

V

max

Grid over-voltage

230.0 V–277.0 V

V

min

Grid under-voltage

179.0 V–230.0 V

1-V

max

Grid over-voltage 1 (V>)

230.0 V–277.0 V

2-V

max

Grid over-voltage 2 (V>>)

230.0 V–277.0 V

1-V

min

Grid under-voltage 1 (V<)

179.0 V–230.0 V

2-V

min

Grid under–voltage 2 (V<<)

179.0 V–230.0 V

* Refer to Tab. 7-7 for the default values of the parameters.

Too high grid voltage may affect the normal usage and the

life of

household loads. The loss of any or all the warranty rights may follow if
the protection set-point is beyond the specified range.

Protection Recover

Vmax-rec (230.0 V–277.0 V):

Recovery value for over-voltage error. Inverter will start
operating when the grid voltage falls below this value.

Vmin-rec (179.0 V–230.0 V):
Recovery value for under-voltage error. Inverter w ill start

operating when the grid voltage is above this value.

Vmax

-rec: 253.0V

Vmin-rec: 205.0V

7 LCD Operation User Manual

46

Tab. 7-4 Default Parameters for Grid Standards

Parameter

Other
(Default)

AG EE EG PN PC WP

V

max-rec

(V)

253.0

253.0

253.0

253.0

253.0

253.0

253.0

V

min-rec

(V)

205.0

205.0

182.0

182.0

205.0

205.0

205.0

10-Minute Over-voltage Protection

ON: enables t he protection fun ction by default. The

inverter will automatically disconnect from the grid
within 3 s when the average voltage for a 10 min
period exceeds the set-point of 10 Min Over Vtg.
OFF: disables the function.

Range: 244.0 V–258.0 V

10

Min Vtg

: 255

.0

V

OFF

ON

The default val ue of 10 Mi n Vtg is 248. 0 V for New Zeala nd (code “NZ”). Refer
to the following table for different gr id standards in Australia.

Parameter

Other
(Default)

AG EE EG PN PC WP

10 Min Vtg

255.0

255.0

255.0

257.0

258.0

255.0

258.0

Volt-watt Response

The Volt-watt response mode is enabled by default.
Set four grid voltage reference values. The output power of the inverter will vary

in response to the grid voltages.

OFF ON

V1 Ref.： 207.0V

V2 Ref.： 220.0V

V4 Ref.： 265.0V

V3 Ref.： 250.0V

Tab. 7-5 “Volt-watt” Mode Parameter Explanations

Parameter Explanation

Default

Range

AU

NZ

V1 Ref.

Grid voltage reference
value 1

207.0 V 207.0 V

Not
applicable

V2 Ref.

Grid voltage reference
value 2

220.0 V 220.0 V 216 V–230 V

V3 Ref.

Grid voltage reference
value 3

250.0 V 244.0 V 235 V–255 V

V4 Ref.

Grid voltage reference
value 4

265.0 V 255.0 V 244 V–265 V

The response curve is defined by the voltage reference values and
corresponding power levels.

User Manual 7 LCD Operation

47

Power, P/P

rated

%

200

Inverter Voltage, V

V2

V3 V4

210

220

230

240

250

260

270

40%

60%

20%

80%

0%

V1

100%

Default characteristic

Range (lower limit)
Range (upper limit)

Fig. 7-2 Volt-watt Response Curve (“AU” for example)

Grid Protection Voltage Adjusting

All Sungrow’s inverters are compliant with the standard AS/NZS 4777 related to
grid protection requirements. In order to work with unstable utility grids,
inverters are equipped with automatic protection voltage adjusting function
(disabled by default). This mode can be enabled via the LCD.

OFF (default setting): the function is disabled. The grid protection voltage
cannot automatically adjust.

ON: enables t he protection func tion. The inverter wi ll automatically adjus t the
protection threshold to a higher value so as to be normally connected to the grid
in the event of gr i d ov er-voltage. The V

max-rec

will be ad jus ted t he sam e wit h t he

V

max

, with an upper limit value not higher than V

max

.

If the setting is changed from ON to OFF, you should
set the protection voltage as specified in Tab. 7-3
according to local protection requirements.

OFF ON

If the automatic prot ection voltage adjusting function i s set to ON, t he
volt-watt response and the 10-m inute over-voltage protection f unction
will be automatically disabled.

If the line voltage or frequency goes outside pre-determined
parameters, the inverter must shut down for safety purposes, which
means it is not a f aulty inverter in t hese instances. High line voltages
may damage home appliances and Sungr ow is not held r esponsible or
liable for these issues.

7 LCD Operation User Manual

48

7.5.3 Zero-export Setting

Touch ENT / ESC to select and press ENT to confirm.
Touch ESC to change the value and touch ENT to move the cursor. Press
ENT to confirm the export power per centage.

OFF: all the power w ill be expor ted to the grid. (by

default)
ON: no power will be exported to the grid.
Partial: part of t he export power will be expor ted to
the grid.

Total Export: the ex por t power upper limit of the whole

system.

ON

OFF

Total Export

: 1000W

Partial

(0W–5000

W)

The range of export power will automatically change:

When the exis ting inverter is disabled: 0 to (rated pow er of the inverter)
When the existing inverter is enabled:



The lower limit is the rated power of existing inverter.



The upper limi t is ([rated power of the exist ing inverter] + rat ed power of
the inverter ).

For example, retrofit an existing PV system (rated power: 2000 W) with SG5K-D

(rated power: 5000 W). The total export range will be 2000 W – 7000 W.

A prompt will appear when you s et it for the s econd
time.

Set by solar

professionals only！

With the password 111, the zero-export setting can only be done at the
first time. The later modification can be performed by professionals only,
please contact SUNGRO W.

7.5.4 Adding the Existing Inverter

Rated-P: rat ed pow er of the existi ng inverter.

This function is OFF by default.

If the existing

inverter is s et to ON, its rated power is the lower
limit for export power setting.

ON

OFF

Rated-P:

Existing Inverter

(

0W~30000W)

2000

W

7.5.5 PF Setting

The inverter is capable of operating with fi xed power factor. The PF ranges from 0.8

leading (+) to 0.8 lagging (-).

User Manual 7 LCD Operation

49

+ (Leading): the inverter is sourcing reactive power to

the grid.

- (Lagging): the inverter is sinking reactive power from

the grid.

PF

：

+

1

.

000

7.5.6 Parameter Reset

All settable

parameters will return to the default values once the

“Param Reset” operation is performed.

Press ENT to confirm the operation.

Press ESC to discard the operation.

Confirm resume

setting?

7.5.7 DRM Switch Setting

Touch ENT / ESC to select and press ENT to confirm.

ON: enable the DRM function.

OFF: disable the DRM function. (By default)

OFF ON

7.5.8 GND Detection

Touch ENT / ESC to select and press ENT to confirm.

Select ON to enable the GND Detection.

If the

enclosure of the inverter is not grounded, the error
code 106 will be shown on the main screen. The
buzzer inside will sound at the same time.

OFF

ON

7.5.9 Energy A djus tment

If the accumul ative val ue “E-total” displayed on invert er scr een is different fr om
the value indicated on the metering device, you should adjust the energy
deviation.

(Energy Adj. value) = (Real m easured value) - (E-total reading value)

Touch ESC to add the value and Touch ENT t o m o ve

the cursor. Press ENT to confirm the setting.
The “+” can be changed to “-” by touching ESC.

The adjustment rangs from -9999 kWh to +9999 kWh.

+0000 kWh

7.5.10 Setting Communication Parameter

Touch ESC to set the appropriate value and

touch ENT to move the cursor. Confirm settings

by pressing ENT.
Device address range: 1-247.

Modbus ID

: 031

7 LCD Operation User Manual

50

7.5.11 Ethernet Configu ra tion

The Ethernet setting is reserved for later usage.

Touch ENT to select and press ENT to confirm.

OFF: The IP address should be assigned manually.
ON: Automatically assign IP address from the home

router.

Touch ESC to switch between the DHCP and the IP
interfaces.

ONOFF

IP:

DHCP:

192.

168.001

.100

7.6 Starting/Stopping the Inverter

Main Screen (Press ENT)→Menu (Touch ESC)→ON/OFF (Press ENT)

Touch ENT / ESC to select and press ENT to

confirm.

ON OFF

Confirm your selection by pressing ENT.

Confirm turn on? Confirm turn off?

7.7 Viewing the Error Record

Main Screen (Press ENT)→Menu (Touch ESC)→Error Record (Press ENT)

Scroll pages by touching ENT / ESC.
3 records can be displayed on each page and 20
records at most for all.

Press ESC to exit.

2 15/01

/21 09:10:08 004

1 15/01/21 09:10:12 010
3 15/01/21 09:11:08 005

P1/7

7.8 Setting the Time

The correct system time is very important. If there is deviation between the
system time and t he l ocal t ime, the inver t er w il l not operat e nor m all y. The clock
is in 24-hour format.

User Manual 7 LCD Operation

51

Main Screen (Press ENT)→Menu (Touch ESC)→Time (Press ENT)

DD, MM, and YY stand for day, month, and year
respectively.
hh, mm, and ss stan

d for hour, minute, and

second respectively.
Scroll pages by pressing ENT.

Date: 05 / 01 / 17

Time: 10 : 30 : 05

DD / MM / YY

hh : mm : ss

7.9 Setting the Country

To mak e t he prot ec tion paramet er s set t ing conveni ent , inver ter provi des bui l t -in
protection parameters for certain countries. The country setting is protected
with a password.

Main Screen (P ress ENT)→Menu (Touch ESC)→Country (Press ENT)

Touch ESC to add the value and Touch ENT to m ov e

the cursor. Input the password 111.

Password: 1 1 1

Touch ENT / ESC to choose the country and press

ENT to confirm.

If the country selected is not in t he list, please choose

Other and then set the protection parameters manually.

GB

DE

FR

ES

BE

NL

AT

AU

CN

CZ

SE

KR

TH

LUX

Other

NZ

BRA

IT

Tab. 7-6 Country Code Description

Code

Full Name

Language

Code

Full Name

Language

GB

Great Britain

English

BRA

Brazil

Portuguese

DE

Germany

German

CN

China

Chinese

FR

France

French

SE

Sweden

English

IT

Italy

Italian

TH

Thailand

English

ES

Spain

English

KR

Korea

English

AT

Austria

German

LUX

Luxemburg

German

AU

Australia

English

NZ

New Zealand

English

CZ Czech English NL Netherlands English

BE Belgium English Other

Country not

included

above

English

* The countr y code “Other” repr esents 50 Hz grid and 6 0 Hz gri d. The inver ter
will automatically choose 50 Hz or 60 H z according to the local grid frequency.

If the country code is set to “AU”, the grid company

setting will appear. Touch ENT / ESC to choose the
grid standard and press ENT to confirm.

EE

AG

PN

PC

WP

EG

Other

7 LCD Operation User Manual

52

When the grid is set to “ EE” or “EG”, t he r eacti ve power regul at ion wi ll be i n PF
mode with the pow er factor of +0.90 (0.90 lagging).

Tab. 7-7 Grid Standard Description

Grid company Code

Company

AG

AusGrid , NSW

EE

Ergon Energy, QLD

PN

SA Power Networks,SA

PC

Powercor,VIC

WP

Western Power,WA

EG

Energex, QLD

Other

Company not mentioned above

Each grid standard c ode represents cor responding protecti ve parameters that
have been preset before deli very. The parameters for “Other” are applicable t o
Australi an and compliant with the standard AS/NZS 4777.

The values listed in the following table are for your reference only. Please follow
the requirements of local grid standard.

Tab. 7-8 Protective Parameters of Grid Standards

Parameter

Other
(Default)

AG EE EG PN PC WP

Over-voltage

1-V

max

(V)

260.0

260.0

260.0

260.0

260.0

260.0

260.0

1-Time (s)

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2-V

max

(V)

265.0

265.0

265.0

265.0

265.0

265.0

265.0

2-Time (s)

0.20

0.20

0.20

0.20

0.20

0.20

0.20

Under-voltage

1-V

min

(V)

180.0

200.0

180.0

180.0

180.0

180.0

180.0

1-Time (s)

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2-V

min

(V)

180.0

200.0

180.0

180.0

180.0

180.0

180.0

2-Time (s)

2.0

2.0

2.0

2.0

2.0

2.0

2.0

Over-frequency

1-F

max

(Hz)

52.00

52.00

52.00

52.00

52.00

52.00

51.50

1-Time (s)

0.20

0.20

0.20

0.20

0.20

0.20

0.20

2-F

max

(Hz)

52.00

52.00

52.00

52.00

52.00

52.00

51.50

2-Time (s)

0.20

0.20

0.20

0.20

0.20

0.20

0.20

Under-frequency

1-F

min

(Hz)

47.00

48.00

47.00

47.00

47.00

47.00

47.00

1-Time (s)

1.50

1.50

1.50

1.50

1.50

1.50

1.50

2-F

min

(Hz)

47.00

48.00

47.00

47.00

47.00

47.00

47.00

2-Time (s)

1.50

1.50

1.50

1.50

1.50

1.50

1.50

10-min voltage

1-V

10-min

(V)

255.0

255.0

255.0

257.0

258.0

255.0

258.0

User Manual 7 LCD Operation

53

Refer to Tab. 7-3

for the parameter explanation and range. If you

(qualified personnel only) need to modify the voltage protective

parameters, please refer to “Single/Multiple Protection”.

7.10 Viewing Device Info

Main Screen (Press ENT)→Menu (Touch ESC)→Device Info (Press ENT)

These interfaces show the read-only information.
Scroll pages by touching ENT / ESC.
Press ESC to exit.

SG3K-S

Device Type:

SN:

A1610090001

Country:

AU

Version

:

CrysG2-V31_FW_V22

54

8 Troubleshooting and
Maintenance

8.1 Troubleshooting

8.1.1 LED Indicator

See “Tab. 6-2 Indicator Status Description” for the defi nition.

Fault Type

Troubleshooting

LED indicator

cannot be lit.

1. Disconnect the AC circuit breaker.

2. Rotate the optional DC switch to “OFF”.

3. Check the polarity of DC input.

Green indicator

goes out.

1. Disconnect the AC circuit breaker.

2. Rotate the optional DC switch to “OFF”.

3. Check the inverter electrical connection. Refer to “5

Electrical Connection”.

4. Check whether the voltage of DC input exceeds the

inverter start-up voltage.

5. If all the above conditions are OK, please contact

SUNGROW.

8.1.2 Errors on the App or LCD Screen

If an error occurs, the “Error” state will be show n on the main s creen. We need
the following information to provide you with the best assistance:

 inverter type (e.g. string, central, grid-connected, hybrid, transformerless,

single phase, triple phase, si ngle MP PT, multiple MPPTs),

 product name,
 serial number of the inverter,
 error code / name, and
 a brief description of the problem.

User Manual 8 Troubleshooting and Maintenance

55

Code

Description

Troubleshooting

002

Grid over-voltage.

The grid voltage

exceeds the protective
value. (stage I)

1. Check the voltage of the grid.

2. If the grid voltage exceeds the

permissible range of inverter protection

parameters, ask utility grid company for
solution.

3. If the grid voltage is within the

permissible range, contact Sungrow Service

Dept.

003

Transient over-voltage.

The g

rid transient
voltage exceeds
inverter allowable
upper limit.

1. This is a short-term fault due to grid

condition. Wait a

moment for inverter

recovery.

2. If the fault persist

s, please contact

Sungrow Service Dept.

004

Grid under-voltage.

The grid voltage is

below

the protective

value. (stage I)

1. Check the grid voltage.

2. If the grid voltage exceeds the

permissible range

of inverter protection

parameters, ask utility grid company for

solution.

3. If the grid voltage is within the

permissible range, contact Sungrow Service

Dept.

005

Grid under-voltage.
The grid voltage is

below

the protective

value, which is lower

than the protective
value of error 004.

(stage II)

1. This is a short-term fault due to grid

condition. Wait a moment for inverter

recovery.

2. If the fault persist

s, please contact

Sungrow Service Dept.

006

AC over-current.

The AC output current

exceeds inverter

allowable upper limit.

1. The inverter will resume if the output

current falls below the protection value.

2. If the fault persists, please contact

Sungrow Service Dept.

007

Transient AC

overcurrent.

1. The inverter will self-recover after several

seconds.

2. If the fault persists, please contact

Sungrow Service Dept.

008

Grid over-frequency.
The grid frequency

exceeds the protective

value. (stage I)

1. Check the grid frequency.

2. If the grid frequency exceeds the

permissible range of inverter protection

parameters, ask utility grid company for

solution.

3. If the grid frequency is within the

permissible range, contact Sungrow Service

Dept.

009

Grid under-frequency.

The grid frequency is

below

the protective

value. (stage I)

8 Troubleshooting and Maintenance User Manual

56

Code

Description

Troubleshooting

010 Grid failure (Islanding)

1. Check whether AC circuit breaker is

triggered.

2. Check whether AC cables are all firmly

connected.

3. Check whether grid is not in service.

4. If all conditions are OK and this fault still

occurs in the LCD screen, contact Sungrow

Service Dept.

011

DC injection

over-current.
The DC current
injection of AC current
exceeds the upper

limit.

1. Wait a moment for inverter recovery.

2. If the fault occurs repeatedly, contact

Sungrow Service Dept.

012

Leakage current

over-current.

The leakage current

exceeds inverter

allowable upper limit.

1. Check the PV strings for ground fault.

2. If the fault occurs repeatedly, contact

Sungrow Service Dept.

014

10-

minute grid

over-voltage.

The average grid

voltage in

10 minutes

exceeds the

permissible range.

1. Check whether the inverter selected

country code is the country you are in.

2. Wait a moment for inverter recovery.

3. Check the voltage of the grid. If the grid
voltage exceeds the permissible range of
inverter protection parameters, ask utility
grid company for solution.

4. If the fault occurs repeatedly, contact

Sungrow Service Dept.

015

Grid over-voltage
The grid voltage

exceeds the protective

value, which is higher
than the protective

value of error 002.

(stage II)

1. Check the model of the AC cables.

2. Wait a moment for inverter recovery.

3. If the grid voltage exceeds the

permissible range, ask utility grid company
for solution.

4. If the fault occurs repeatedly, contact

Sungrow Service Dept.

016

The bus voltage or

power is high.

1. Wait a moment for inverter recovery.

2. If the fault occurs repeatedly, contact

Sungrow Service Dept.

019

Bus transient

over-voltage.

The transient bus
voltage exceeds
inverter allowable
upper limit.

1. Wait a moment for inverter recovery.

2. If the fault occurs repeatedly, contact

Sungrow Service Dept.

020

Bus over-voltage.

The bus voltage

exceeds inverter

allowable upper limit.

1. Wait a moment for inverter recovery.

2. If the fault occurs repeatedly, contact

Sungrow Service Dept.

User Manual 8 Troubleshooting and Maintenance

57

Code

Description

Troubleshooting

021 PV1 input over-current.

Check the layout and the wiring of PV1
input.

022 PV2 input over-current.

Check the layout and the wiring of PV2
input.

028

PV1 reverse
connection.

Check the cable connections of PV1.

029

PV2 reverse
connection.

Check the cable connect i ons of PV2.

036

The temperature of
radiator is too high.

1. Check whether the ambient temperature

shown on the screen is too high. Wait a
moment for inverter recovery.

2. Check whether there is enough space for

convection.

3. Check whether the inverter is in direct

sunlight.

4. Check whether the fan is normal.

Replace it if necessary.

5. Clean the air inlets.

6. If the fault persists, please contact

Sungrow.

037

The internal

temperature of inverter
is too high.

038

Relay fault on the grid

side.

1. Wait a moment for inverter recovery.

2. If the fault occurs repeatedly, contact

Sungrow Service Dept.

039

The insulation

resistance

of PV to

earth is low. (ISO-flt)

1. Check whether there is a reliable inverter

grounding line.

2. Check whether one of the P V strings is

short-circuited with ground.

3. Wait a moment for inverter recovery.

4. If the fault occurs repeatedly, contact

Sungrow Service Dept.

041

Leakage current

sampling fault.

1. Wait a moment for inverter recovery.

2. If the fault occurs repeatedly, contact

Sungrow Service Dept.

043

Inner

under-temperature
fault.

The ambient

temperature inside the

inverter is too low.

The inverter will recover once the ambient

temperature rises above -25℃.

044

Inverter self-test fault.

1. Wait a moment for inverter recovery.

2. If the fault occurs repeatedly, contact

Sungrow Service Dept.

045

PV1 boost circuit
fault.

046

PV2 boost circuit
fault.

048

Phase current
sampling fault.

8 Troubleshooting and Maintenance User Manual

58

Code

Description

Troubleshooting

053

The slave DS P detects
that the

grid voltage

exceeds inverter
allowable upper limit.

1. Check the grid voltage.

2. If the grid voltage exceeds the
permissible range of inverter protection
parameters, ask utility grid company for

solution.

3. If the grid voltage is within the

permissible range, contact Sungrow Service

Dept.

054

The slave DS P detects
that the grid frequency
exceeds inverter
allowable upper limit.

1. Check the grid frequency.

2. If the grid frequency exceeds the
permissible range of inverter protection

parameters,

ask utility grid company for

solution.

3. If the grid frequency is within the

permissible range, contact Sungrow Service

Dept.

056

The slave DS P detects

that the leakage

current exceeds
inverter allowable
upper limit.

1. Check whether there is a grounded fault

of the PV string.

2. If the fault occurs repeatedly, contact

Sungrow Service Dept.

059

Communication alarm
between master DSP
and slave DSP.

1. Wait 1 minute for inverter recovery.

2. If the fault persists, contact Sungrow

Service Dept.

061

Alarm for no inverter
type setting.

Contact Sungrow Service Dept.

070 Fans are defective

Stop the inverter and disconnect the AC &

DC cables. Check whether the fan duct has

been blocked. If not, replace fans.

084

Warning for reverse

cable connecti on of the
Sungrow Meter.

1. Check whether the power cable

connections are correct.

2. If “Existing Inverter” is set to “ON” via
LCD menu, check and ensure that its rated
power is correctly set.

3. For Sungrow single-phase meter, check
whether the CT clamp of the 1-phase
sensor is correctly placed. Refer to “5.6.1

On the Meter Side”.

085

Mismatched software

version.

Please contact Sungrow Service Dept.

100

The AC output current
exceeds the upper
limit.

1. The inverter will resume if the output

current falls below the protection value.

2. If the fault

persists, please contact

Sungrow Service Dept.

User Manual 8 Troubleshooting and Maintenance

59

Code

Description

Troubleshooting

101

Grid over-frequency.
The grid frequency

exceeds the protective
value, which is higher

than the protective

value of error 008.

(stage II)

1. Check the grid frequency.

2. If the grid frequency exceeds the

p

ermissible range of inverter protection

parameters, ask utility grid company for

solution.

3. If the grid frequency is within the

permissible range, contact Sungrow Service
Dept.

102

Grid under-frequency.

The grid frequency is

below

the protective

value,

which is lower

than the protective

value of error 009.

(stage II)

106

Abnormal grounding.

Neither the PE terminal
on the AC connection
block nor the second

PE terminal on the
enclosure is reliably
connected.

Check whether there is a reliable inverter

grounding line, if there is access to the

ground, and the fault persists, please

contact Sungrow Service Dept.

200

Bus hardware

over-voltage fault.

The bus voltage

exceeds the protective

value.

1. Wait for inverter recovery after bus

voltage lower.

2. If the fault occurs repeatedly, contact

Sungrow Service Dept.

201

The bus voltage is too
low.

1. Wait a moment for inverter recovery.

2. If the fault occurs repeatedly, contact

Sungrow Service Dept.

202

PV hardware

over-current fault.

The PV1 or PV2

current exceeds the

protective value.

If the fault occurs repeatedly, contact

Sungrow Service Dept.

203

The PV input voltage

exceeds the bus

voltage.

Check the functionality of the PV

connection terminals.

306

Input and output power

mismatching fault.

If the fault occurs repeatedly, contact

Sungrow Service Dept.

315

PV1 current sampling

fault.

Channel sampling anomaly.
Contact Sungrow Service Dept.

316

PV2 current sampling

fault.

320

Leakage current

sensor fault.

Contact Sungrow Service Dept.

409

All temperature

sensors fail.

If the fault occurs repeatedly, contact

Sungrow Service Dept.

8 Troubleshooting and Maintenance User Manual

60

Code

Description

Troubleshooting

503

Ambient temperature

sensor

open circuit

warning.

504

Ambient temperature

sensor

short circuit

warning.

505

Radiator temperature

sensor

open circuit

warning.

506

Radiator temperature

sensor

short circuit

warning.

501

External memory
reading/writing
warning.

1. Inverter can normally be connected to the

grid.

2. Power on the inverter again. If the fault

persists, cont act Sungrow Servic e Dept.

514

Abnormal

communication

warning of the

Sungrow Meter.

(Inverter can be

normally

connected to

the grid.)

1. Check whether the power cable

connections of the meter are correct.

2. Check whether the RS485 connection is

correct.

8.2 Routine Maintenance

Risk of inverter damage or personal injury due to incorrect service!
Always keep i n mind that t he inverter is powered b y dual sources: PV

strings and utility grid.
Before any ser vice work, observe t h e following procedure.
 Disconnect the AC circuit breaker and then set the DC load-break

switch if the inverter to OFF;

 Wait at least 10 minut es for inner capacitors to discharge completely;
 Verify that there is no voltage or current before pulling any connector.

User Manual 8 Troubleshooting and Maintenance

61

Keep non-related persons away!

A temporary warning sign or barrier must be posted to keep

non-related perso ns away while performing electrical connecti on and
service work.

Risk of inverter damage if it is improperly serviced.

Use accessories and spare parts approved by the inverter

manufacturer only. Never modify the inverter or other components of
the inverter.

Unauthoriz ed alterations will void g uarantee and warrant y claims and
in most cases term inate the operat ing license. SUNGROW shal l not be
held liable f o r any damage caused by such changes.

Any malfuncti on that ma y impair the inver ter saf ety operati on must be
repaired immediately before the inverter is restarted.

Inverter contains no customer servicea ble parts inside. Ple ase contact
local authorized personnel if an y service work is required.

Servicing of the device in ac cordance with t he manual should n ever
be undertaken in t he absenc e of proper tools, test equipm ents or t he

more recent revision of the manual which has been clearly and

thoroughly understood.

Items

Methods

Period

System

clean

Check the temperature and dust of the

inverter. Clean the inverter enclosure.

Check the humidity and dust of the

environment. Meanwhile check whether
the filter function of the air inlet is ok.

Six months to a year (it

depends on the dust

contents in air.)

62

9 S yst em Decommission ing

9.1 Disconnecting the Invert er

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.

1. Stop the inverter via the LCD menu. For details, see “7.6
Starting/Stopping the Invert er”.

2. Disconnect the AC circuit breaker and secure it agai nst reconnection.

3. Rotate DC switch to “OFF”. Disconnec t the external DC circuit breaker.

Please stri ctly follow the sequence of the above procedures. Inverter
will not work normally if otherwise.

4. Wait about 10 mi nutes unt il t he c apacitor s insi de the inver ter c omplet ely
discharge.

5. Measure to confirm that the AC output at the AC circuit breaker is voltage
free.

6. Remove the AC connector. Lay the tool in the location of snap and press
the tool down. Then snap can be pushed from the AC terminal.

7. Release the loc king part of PV connectors by press ing on the ribbing of
the locki ng hooks with nipper plier s and pull it outwards.

Press the ribbing Pull outwards Disconnect DC connectors

For further disconnection and conductor reconnection instruction,

please visi t the webpage of respective component manufacturer.

User Manual 9 System Decommissioning

63

9.2 Dismantling the Inverter

Risk of burn injuries and electric shock!

Do not touch any inner live parts until at least 10 minutes after

disconnecting the inverter from the utility grid and the PV input.

1. Refer to “5 Electrical C onnection” for the inver ter disconnection of al l
cables in reverse steps.

2. Dismantle t he inverter referr ing to “4 Mechanical Mounting” in reverse
steps.

3. If necessary, remove the wall-mount ing bracket from the wall.

4. If the inverter will be reinstalled in the future, please refer to “3

Unpacking and Storage” for a proper conservation.

9.3 Disposing of the Inverter

Users take the responsibility for the disposal of the inver ter.

Some parts and devices of the inverter, such as the capacitors, may
cause environment pol lution.

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

accordance with the disposal regulations for electronic waste

applicable at the installation site.

64

10 Appendix

10.1 Technical Data

10.1.1 –S Series

Parameters

SG2K-S

SG2K5-S

SG3K-S

Input Data

Max. PV input power

3000 W

3200 W

4000 W

Max. PV input voltage

600 V

Startup voltage

120 V

Nominal input voltage

360 V

MPP voltage range

90 V–560 V

MPP voltage range for nominal
power

210 V–480 V 260 V–480 V 310 V–480 V

No. of MPPTs

1

Max. number of PV strings per
MPPT

1

Max. PV input current

10 A

Max. current for input
connector

12 A

Short-circuit current of PV
input

12 A

Max. inverter backfeed current
to PV string

0 A

Output Data

Nominal AC output power

2000 W

2500 W

3000 W

Max. AC output apparent
power

2000 VA 2500 VA 3000 VA

Max. AC output current

9.1 A

11.3 A

13.7 A

Max. inrush current
(peak value / duration)

8 A / 12 ms

Max. output fault current
(peak value / duration)

80 A / 3.2 ms

Max. output over-current
protection

25 A

Nominal AC voltage

230 Vac (single phase)

AC voltage range

180 Vac–276 Vac
(this may vary with grid standards)

Nominal grid frequency

50 Hz / 60 Hz

Grid frequency range

45 Hz–55 Hz / 55 Hz–65 Hz
(this may vary with grid standards)

Total harmonic distortion

<3% (of nominal power)

User Manual 10 Appendix

65

Parameters

SG2K-S

SG2K5-S

SG3K-S

(THD)

DC current injection

<0.5% (of nominal current)

Power factor

>0.99 at default value at nominal power
(adj. 0.8 leading to 0.8 lagging)

Protection

PV reverse connection
protection

Yes

AC short circuit protection

Yes

Leakage current protection

Yes

Anti-islanding protection

Yes (frequency shift)

DC switch

Optional

Overvoltage category

III [AC], II [DC]

Overvoltage protection

II [AC]

Safety protection class

I

System Data

Max. efficiency

98.2 %

98.2 %

98.2 %

Max. European efficiency

97.2 %

97.5 %

97.7 %

Isolation method

Transformerless

Ingress protection rating

IP65

Pollution degree outside the
enclosure

3

Pollution degree inside the
enclosure

2

Power loss in night mode

< 1 W

Operating ambient
temperature

-25℃ to +60℃

Allowable relative humidity

0–100 % (non-condensing)

Cooling method

Natural cooling

Max. operating altitude

4000 m (derating when > 2000 m)

Display

Graphic LCD

Communication

Wi-Fi

PV connection type

MC4

AC connection type

Plug and play connector

Certification

IEC 62109-1, IEC 62109-2, IEC 62116, IEC

61727, EN 61000-6-2, EN 61000-6-3,
AS4777.2, ABNT NBR 16149, ABNT NBR
16150, VDE-AR-N-4105, CEI 0-21,
VDE0126-1-1, UTE C15-712, VFR-2014,

EN50438, C10/11, G83/2, G59/3

Mechanical Dat a

Dimensions (W x H x D)

300 mm x 370 mm x 125 mm

Mounting method

Wall-mounting bracket

Weight

8.5 kg

10 Appendix User Ma nu al

66

10.1.2 –D Series

Parameters

SG3K-D

SG5K-D

SG8K-D

Input Data

Max. PV input power

4000 W

6500 W

10400 W

Max. PV input voltage

600 V

Startup voltage

120 V

Nominal input voltage

360 V

MPP voltage range

90 V–560 V

90 V–560 V

90 V–540 V

MPP voltage range for nominal
power

160 V–480 V 260 V–480 V 275 V–480 V

No. of MPPTs

2

Max. number of PV strings per
MPPT

1 / 1 1 / 1 1 / 2

Max. PV input current

10 A / 10 A

10 A / 10 A

12.5 A / 25 A

Max. current for input
connector

12 A / 12 A 12 A / 12 A 15 A / 30 A

Short-circuit current of PV
input

12 A / 12 A 12 A / 12 A 15 A / 30 A

Max. inverter backfeed current
to PV string

0 A

Output Data

Nominal AC output power

3000 W

4990 W

8000 W

Max AC output apparent
power

3000 VA 4990 VA 8000 VA

Max. AC output current

13.7 A

21.7 A

34.8 A

Max. inrush current
(peak value / duration)

10 A / 12 ms 10 A / 12 ms 25 A / 12 ms

Max. output fault current
(peak value / duration)

100 A / 3.2 ms

100 A / 3.2
ms

93 A / 3.2
ms

Max. output over-current
protection

25 A 32 A 40 A

Nominal AC voltage

230 Vac (single phase)

AC voltage range

180 Vac–276 Vac
(this may vary with grid standards)

Nominal grid frequency

50 Hz / 60 Hz

Grid frequency range

45 Hz–55 Hz / 55 Hz–65 Hz
(this may vary with grid standards)

Total harmonic distortion
(THD)

< 3 % (of nominal power)

DC current injection

< 0.5 % (of nominal current)

Power factor

> 0.99 at default value at nominal power
(adj. 0.8 leading to 0.8 lagging)

Protection

PV reverse connection
protection

Yes

AC short circuit protection

Yes

User Manual 10 Appendix

67

Parameters

SG3K-D

SG5K-D

SG8K-D

Leakage current protection

Yes

Low voltage fault ride through
(LVFRT)

No No Yes

Anti-islanding protection

Yes (frequency shift)

DC switch

Optional

Overvoltage category

III [AC], II [DC]

Overvoltage protection II [AC] II [AC]

II [AC], II
[DC]

Safety protection class

I

System Data

Max. efficiency

98.4 %

98.4 %

98.5 %

Max. European efficiency

97.7 %

98.0 %

98.0 %

Isolation method

Transformerless

Ingress protection rating

IP65

Pollution degree outside/inside
the enclosure

3 / 2

Power loss in night mode

< 1 W

Operating ambient
temperature

-25℃ to +60℃

Allowable relative humidity

0–100 % (non-condensing)

Cooling method

Natural cooling

Max. operating Altitude

4000 m (derating when > 2000 m)

Display

Graphic LCD

Communication

Wi-Fi

PV connection type

MC4

AC connection type

Plug and play connector

Certification

IEC 62109-1, IEC 62109-2, IEC 62116, IEC

61727, EN 61000-6-2, EN 61000-6-3,
AS4777.2, ABNT NBR 16149, ABNT NBR
16150, VDE-AR-N-4105, CEI 0-21,
VDE0126-1-1, UTE C15-712, VFR-2014,

EN50438, C10/11, G83/2, G59/3

Mechanical Dat a

Dimensions (W x H x D) 360 mm x 390 mm x 133 mm

360 mm x

390 mm x

148 mm

Mounting method

Wall-mounting bracket

Weight

11.5 kg

15.5 kg

10 Appendix User Ma nu al

68

10.2 Quality Assurance

When produc t faults occ ur during the war ranty peri od, SUNGROW will provide
free servi ce or replace the product with a new one.

Evidence

During the warranty period, the customer shall provide the product purchase
invoice and date. In addition, the trademark on the product shall be undamaged
and legible. O therwis e, SUNGROW has the right t o refuse to honor t he qualit y
guarantee.

Conditions



After replac em ent, unqualified products shall be processed by SUNGROW.



The customer s hal l gi ve SUNGROW a reasonable p eri od to r e pair t he f ault y
device.

Exclusion of Liability

In the following circums tances, SUNGROW has the right to ref use t o hon or the
quality guar antee:



If the free warranty period for the whole m achine/components have expired.



If the device i s damaged during trans port.



If the device was incorrectly i nstall ed, refitted, or used.



If the device is oper ated in a very improper envir onment, as described in this
manual.



If the fault or damage was caused by installation, repairs, modification, or
disassembly performed by a service provider or personnel other than this
company.



If the fault or damage was caused by the use of non-standard or
non-SUNGROW com ponents or software.



If the installation and use range are beyond stipulations of relevant
international standards.



If the damage was caused by an abnormal natural environment.

For faulty products in any of above cases, if the customer requests
maintenance, paid maintenance service may be provided based on the
judgment of SUNGROW.

User Manual 10 Appendix

69

Software Licenses



It is prohibited t o use data contained in firmware or software develo ped by
SUNGROW, in part or in full, for commercial purposes by any m eans.



It is prohibited t o reverse engineer, crack, or per form any other operations
that comprom ise the original program design of t he software develo ped by
SUNGROW.

Contact Information

Should you have any question about t his product, please contact us.
We need the following information to provide you the best assistance:



Type of the inverter



Serial number of the inverter



Error code/name



Brief description of the problem

China (HQ)

Sungrow Power Supply Co., Ltd
Hefei

[phone]

[email protected]

Australia

Sungrow

Australia Group Pty.

Ltd.
Sydney

[phone]

[email protected]

Brazil

Sungrow Do Brasil
Sao Paulo
[phone]

[email protected]

France

Sungrow France – Siege Social
Paris

[email protected]

10 Appendix User Ma nu al

70

Germany

Sungrow Deutsc hland GmbH
München
[phone]

[email protected]

Greece

Service Partner – Survey Digital
[phone]

[email protected]

India

Sungrow (India) Private Limited
Gurgaon
[phone]

[email protected]

Italy

Sungrow Italy
Milano

[email protected]

Japan

Sungrow Japan K.K.
Tokyo
[phone]

[email protected]

Korea

Sungrow Power Korea Limited
Seoul

[phone]

[email protected]

Malaysia

Sungrow SEA
Selangor Darul Ehsan
[phone]

[email protected]

Philippines

Sungrow Power Supply Co., Ltd
Mandaluyong Ci ty

[phone]

[email protected]

Thailand

Sungrow Thailand Co., Ltd.
Bangkok

[phone]

[email protected]

Spain

Sungrow Ibérica S.L.U.
Navarra

[email protected]

User Manual 10 Appendix

71

Romania

Service Partner - Elerex
[phone]

[email protected]

Turkey

Sungrow

Deutschland GmbH

Turkey Istanbul Representative
Bureau

Istanbul
[phone]

[email protected]

UK

Sungrow Power UK Ltd.
Milton Keynes
[phone]

[email protected]

U.S.A, Mexico

Sungrow USA Corporation
Phoenix Arizona
[phone]

[email protected]

Vietnam

Sungrow Vietnam
Hanoi
[phone]

[email protected]

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