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User Manual

PV Grid-Connected Inverter

SG125CX-P2

SG125CX-P2-UEN-Ver12-202205

No part of this document can be reproduced in any form or by any means without the prior

written permission of Sungrow Power Supply Co., Ltd (hereinafter "SUNGROW").

Trademarks

and other Sungrow trademarks used in this manual are owned by

SUNGROW.

All other trademarks or registered trademarks mentioned in this manual are owned by their

respective owners.

Software Licenses

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

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

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

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

About This Manual

The manual mainly contains the product information, as well as guidelines for installation,

operation, and maintenance. The manual does not include complete information about the

photovoltaic (PV) system. Readers can get additional information at www.sungrowpower.

com or on the webpage of the respective component manufacturer.

Validity

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

• SG125CX-P2

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

Target Group

This manual is intended for professional technicians who are responsible for installation, op-

eration, and maintenance of inverters, and users who need to check inverter parameters.

The inverter must only be installed by professional technicians. The professional technician

is required to meet the following requirements:

• Know electronic, electrical wiring and mechanical expertise, and be familiar with electri-

cal and mechanical schematics.

• Have received professional training related to the installation and commissioning of elec-

trical equipment.

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

commissioning.

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

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

operations.

How to Use This Manual

Please read this manual carefully before using the product and keep it properly at a place

for easy access.

All contents, pictures, marks, and symbols in this manual are owned by SUNGROW. No part

of this document may be reprinted by the non-internal staff of SUNGROW without written

authorization.

Contents of this manual may be periodically updated or revised, and the actual product pur-

chased shall prevail. Users can obtain the latest manual from support.sungrowpower.com

or sales channels.

Symbols

This manual contains important safety instructions, which are highlighted with the following

symbols, to ensure personal and property safety during usage, or to help optimize the prod-

uct performance in an efficient way.

Please carefully understand the meaning of these warning symbols to better use the manual.

III

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

ous injury.

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

serious injury.

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

erate injury.

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

nancial losses.

“NOTE” indicates additional information, emphasized contents or tips that may be

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

Contents

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

1 Safety Instructions ............................................................................................1

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

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

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

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

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

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

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

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

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

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

2.4 LED Indicator .................................................................................................9

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

2.6 Function Description .....................................................................................10

3 Unpacking and Storage .................................................................................13

3.1 Unpacking and Inspection .............................................................................13

3.2 Inverter Storage ...........................................................................................13

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

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

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

4.2.1 Environment Requirements..................................................................16

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

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

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

4.3 Installation Tools...........................................................................................19

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

4.5 Installing the mounting-bracket ......................................................................21

4.5.1 PV Bracket-Mounted Installation ..........................................................22

4.5.2 Wall-Mounted Installation.....................................................................23

4.5.3 Pole-Mounting ....................................................................................25

4.6 Installing the Inverter..................................................................................... 27

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

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

5.2 Terminal Description .....................................................................................30

5.3 Electrical Connection Overview .....................................................................32

5.4 Crimp OT / DT terminal .................................................................................34

5.5 External Grounding Connection..................................................................... 35

5.5.1 External Grounding Requirements........................................................ 36

5.5.2 Connection Procedure.........................................................................36

5.6 AC Cable Connection ...................................................................................37

5.6.1 AC Side Requirements ........................................................................37

5.6.2 Requirements for OT/DT Terminal ........................................................39

5.6.3 Connection Procedure (For a multi-core cable)......................................39

5.6.4 Connection Procedure (For a single-core cable) ....................................44

5.7 DC Cable Connection ...................................................................................48

5.7.1 PV Input Configuration ........................................................................49

5.7.2 Assembling the PV Connectors ............................................................50

5.7.3 Installing the PV Connector.................................................................. 52

5.8 Wiring of Tracking System Power Cable (optional) ..........................................52

5.9 Wireless Communication Module Connection(optional) ...................................54

5.10 WiNet-S Connection (optional).....................................................................55

5.10.1 Ethernet Communication ...................................................................55

5.10.2 WLAN Communication ......................................................................57

5.11 Communication Junction Box.......................................................................57

5.12 Communication Wiring Board ......................................................................58

5.13 RS485 Connection......................................................................................59

5.13.1 Interface Description .........................................................................59

5.13.2 RS485 Communication System..........................................................60

5.13.3 Connection Procedure(Terminal Block) ...............................................61

5.13.4 Connection Procedure (RJ45 Interface) .............................................. 63

5.14 Dry Contact Connection ..............................................................................64

5.14.1 Dry Contact Function.........................................................................64

5.14.2 Wiring Procedure ..............................................................................67

5.15 DRM Connection For Countries “AU” and “NZ” ........................................67（）

5.15.1 DRM Function...................................................................................67

5.15.2 Connection Procedure .......................................................................68

VII

6 Commissioning ...............................................................................................71

6.1 Inspection before Commissioning .................................................................. 71

6.2 Commissioning Procedure ............................................................................71

7 iSolarCloud App ..............................................................................................73

7.1 Brief Introduction ..........................................................................................73

7.2 Installing the App..........................................................................................73

7.3 Login ...........................................................................................................74

7.3.1 Requirements .....................................................................................74

7.3.2 Login Procedure .................................................................................74

7.4 Function Overview........................................................................................78

7.5 Home page ..................................................................................................78

7.6 Run Information............................................................................................81

7.7 Records .......................................................................................................81

7.8 More............................................................................................................84

7.8.1 System Parameters.............................................................................84

7.8.2 Operation Parameters .........................................................................84

7.8.3 Power Regulation Parameters..............................................................86

7.8.4 Communication Parameters.................................................................92

7.8.5 Firmware Update ................................................................................92

7.8.6 Password Changing ............................................................................93

8 System Decommissioning ............................................................................95

8.1 Disconnecting the Inverter.............................................................................95

8.2 Dismantling the Inverter ................................................................................95

8.3 Disposal of the Inverter .................................................................................96

9 Troubleshooting and Maintenance ..............................................................97

9.1 Troubleshooting ...........................................................................................97

9.2 Maintenance .............................................................................................. 105

9.2.1 Maintenance Notices ......................................................................... 105

9.2.2 Routine Maintenance ........................................................................ 106

9.2.3 Cleaning Air Inlet and Outlet...............................................................106

9.2.4 Fan Maintenance .............................................................................. 106

10 Appendix .....................................................................................................109

10.1 Technical Data.......................................................................................... 109

10.2 Wring Distance of DI Dry Contact ............................................................... 110

10.3 Quality Assurance .................................................................................... 112

10.4 Contact Information .................................................................................. 112

1Safety Instructions

When installing, commissioning, operating, and maintaining the product, strictly observe the

labels on the product and the safety requirements in the manual. Incorrect operation or work

may cause:

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

• Damage to the product and other properties.

• The safety instructions in this manual are only supplements and cannot cover

all the precautions that should be followed. Perform operations considering ac-

tual onsite conditions.

• SUNGROW shall not be held liable for any damage caused by violation of gen-

eral safety operation requirements, general safety standards, or any safety in-

struction in this manual.

• When installing, operating, and maintaining the product, comply with local laws

and regulations. The safety precautions in this manual are only supplements

to local laws and regulations.

1.1 Unpacking and Inspection

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

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

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

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

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

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

not install the device and contact SUNGROW in time.

1.2 Installation Safety

Make sure there is no electrical connection before installation.

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

Improper installation may cause personal injury!

• If the product supports hoisting transport and is hoisted by hoisting tools, no

one is allowed to stay under the product.

• When moving the product, be aware of the product weight and keep the balance

to prevent it from tilting or falling.

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

been maintained regularly.

1.3 Electrical Connection Safety

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

otherwise it may cause danger!

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

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

occur!

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

• Operators must wear proper personal protective equipment during electrical

connections.

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

touching DC cables.

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

• The inverter must not be connected to a PV string that requires positive or neg-

ative grounding.

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

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

• Note and observe the warning labels on the product, and perform operations

strictly following the safety instructions.

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

documents.

1 Safety Instructions User Manual

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

• Electrical connection must be performed by professionals.

• All cables used in the PV generation system must be firmly attached, properly

insulated, and adequately dimensioned.

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

nectors to corresponding terminals only after ensuring polarity correctness.

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

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

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

caused by this is not covered by the warranty.

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

lated to the local grid.

1.4 Operation Safety

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

• When the inverter is running, it is strictly forbidden to plug and unplug any con-

nector on the inverter.

• When the inverter is running, do not touch any wiring terminal of the inverter.

Otherwise, electric shock may occur.

• When the inverter is running, do not disassemble any parts of the inverter. Oth-

erwise, electric shock may occur.

• When the inverter is running, it is strictly forbidden to touch any hot parts of the

inverter (such as the heat sink). Otherwise, it may cause burns.

• If the inverter is equipped with a DC switch, do not operate it when the inverter

is running. Otherwise, device damage or personal injury may occur.

User Manual 1 Safety Instructions

1.5 Maintenance Safety

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

• Before any service work, first disconnect the grid-side AC circuit breaker and

check the inverter status. If the inverter indicator is off, please wait until night to

disconnect the DC switch. If the inverter indicator is on, directly disconnect the

DC switch.

• After the inverter is powered off for 5 minutes, measure the voltage and current

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

erators who wear protective equipment operate and maintain the inverter.

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

tective gloves before operating the inverter after it cools down.

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

nected to the power grid may lead to electric shock!

• The power grid side may generate voltage. Always use a standard voltmeter to

ensure that there is no voltage before touching.

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

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

accidents caused by misuse.

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

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

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

1.6 Disposal Safety

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

ards to avoid property losses or casualties.

1 Safety Instructions User Manual

2Product Description

2.1 System Introduction

The inverter is a transformerless 3-phase PV grid-connected inverter. As an integral compo-

nent in the PV power system, the inverter is designed to convert the direct current power

generated from the PV modules into grid-compatible AC current and to feed the AC current

into the utility grid.

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

figure 2-1 Inverter Application in PV Power System

The inverter must not be connected to a PV string that requires positive or negative

grounding.

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

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

Item Description Note

APV strings Monocrystalline silicon, polycrystalline silicon and thin-film

without grounding.

B Inverter SG125CX-P2

CGrid connection

cabinet

Includes devices such as AC circuit breaker, SPD, metering

device.

D Transformer

Boost the low voltage from the inverter to grid-compatible me-

dium voltage. Optional（）

EUtility grid The grid forms supported by the inverter are shown in the fig-

ure below.

Make sure the inverter is applied to an IT system before enabling the PID recovery

function.

2.2 Product Introduction

Model Description

The model description is as follows :

2 Product Description User Manual

Appearance

figure 2-2 Inverter Appearance

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

No. Name Description

LED indicator

panel

HMI interface to indicate the present working state of the

inverter.

2AC junction box Used to connect AC cables and the power cable for tracking

system.

3Additional ground-

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

4 Bottom handles 2, used to move the inverter.

5Mounting ears 4, used to hang the inverter onto the mounting-bracket.

6Wiring area

DC switches, DC terminals, and communication terminals.

For details, refer to"5.2 Terminal Description"

7 Labels Warning symbols, nameplate, and QR code.

Dimensions

The following figure shows the dimensions of the inverter.

User Manual 2 Product Description

figure 2-3 Dimensions of the Inverter(in mm)

Weight

Model Weight

SG125CX-P2 87 kg

2.3 Symbols on the Product

Symbol Explanation

Do not dispose of the inverter together with household waste.

TÜV mark of conformity.

CE mark of conformity.

EU/EEA Importer.

Regulatory compliance mark.

CGC-SOLAR mark of conformity.

UKCA mark of conformity.

Disconnect the inverter from all the external power sources be-

fore maintenance!

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

2 Product Description User Manual

Symbol Explanation

Danger to life due to high voltages!

Do not touch live parts for 5 minutes after disconnection from

the power sources.

Only qualified personnel can open and maintain the inverter.

Additional grounding point.

Read the user manual before maintenance!

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

2.4 LED Indicator

The LED indicator on the front of the inverter indicates the working state of the inverter.

table 2-1 State description of the LED indicator

LED color State Definition

Blue

The device is connected to the grid and operating

normally.

Fast blink

(Period: 0.2s)

The Bluetooth communication is connected and there

is data communication.

No system fault occurs.

Slow blink

(Period: 2s)

The device is in standby or startup state (not feeding

power into the grid).

Slow blink

once, fast

blink three

times

The inverter is performing PID recovery.

Red

A fault occurs and the device cannot connect to the

grid.

Twinkling The Bluetooth connection is established, data commu-

nication in process, and a system fault occurs.

Gray

OFF Both the AC and DC sides are powered down.

User Manual 2 Product Description

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

tion to the electricity safety during operating.

2.5 Circuit Diagram

The following figure shows the main circuit of the inverter.

figure 2-4 Circuit Diagram

• DC switches can safely disconnect the PV input when necessary to ensure the safe op-

eration of the inverter and the safety of personnel.

• The DC SPD provides a discharge circuit for the DC side over-voltage power to prevent

it from damaging the internal circuits of the inverter.

• EMI filters can filter out the electromagnetic interference inside the inverter to ensure that

the inverter meets the requirements of electromagnetic compatibility standards.

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

ferent PV input conditions.

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

the grid.

• The AC filter filters the output AC component of high frequency to ensure that the output

current meets the grid requirements.

• The AC relay isolates the AC output of the inverter from the grid, making the inverter safe

from the grid in case of inverter failure or grid failure.

• The AC SPD provides a discharge circuit for the AC side over-voltage power to prevent it

from damaging the internal circuits of the inverter.

2.6 Function Description

The inverter is equipped with the following functions:

Conversion Function

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

Data Storage and Display

The inverter logs system information like running information, error records, etc.

2 Product Description User Manual

Parameter Configuration

The inverter provides various parameter configurations. Users can set parameters via the

App to meet different needs and optimize the inverter performance.

Communication Interface

The inverter is designed with standard RS485 communication interfaces and communication

accessory port.

• The standard RS485 communication interfaces are used to establish communication

with monitoring devices and to upload monitoring data to a monitoring background

through communication cables.

• The communication accessory port is used to connect communication module manufac-

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

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

When communication is established between the inverter and the communication devices,

users can view inverter information or set inverter parameters, such as running parameter

and protection parameter, through the iSolarCloud.

It is recommended to use the communication module from SUNGROW. Using a

device from other companies may lead to communication failure or other unex-

pected damage.

Protection Function

The inverter is equipped with anti-island protection, LVRT/HVRT, DC reversed polarity pro-

tection, AC short circuit protection, leakage current protection, DC over-voltage/over-current

protection, etc.

PID Recovery

The PID effect (Potential Induced Degradation) of PV modules will cause serious damage to

generated output and yield, which can be avoided or recovered by PID recovery function.

• For positive voltage scheme, after the PID is enabled, the voltage to ground of all PV

strings is greater than 0, and therefore the PV string-to-ground voltage is a positive value.

• For negative voltage scheme, after the PID is enabled, the voltage to ground of all PV

strings is lower than 0, and therefore the PV string-to-ground voltage is a negative value.

User Manual 2 Product Description

3Unpacking and Storage

3.1 Unpacking and Inspection

The product is thoroughly tested and strictly inspected before delivery. Nonetheless, dam-

age may still occur during shipping. For this reason, please conduct a thorough inspection

after receiving the product.

• Check the packing case for any visible damage.

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

• Check the inner contents for damage after unpacking.

Contact SUNGROW or the transport company in case of any damage or incompleteness,

and provide photos to facilitate services.

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

original packing case when the product is decommissioned.

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

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

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

not install the device and contact SUNGROW in time.

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

3.2 Inverter Storage

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

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

• The storage temperature must be always between -40 and +70 , and the storage rel-℃ ℃

ative humidity must be always between 0 and 95 %, non-condensing.

• In case of stacking storage, the number of stacking layers should never exceed the limit

marked on the outer side of the packing case.

• The packing case should be upright.

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

ing it.

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

field.

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

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

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

and insects.

• Carry out periodic inspections. Inspection shall be conducted at least once every six

months. If any insect or rodent bites are found, replace the packaging materials in time.

• If the inverter has been stored for more than a year, inspection and testing by professio-

nals are required before it can be put into operation.

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

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

3 Unpacking and Storage User Manual

4Mechanical Mounting

Respect all local standards and requirements during mechanical installation.

4.1 Safety during Mounting

Make sure there is no electrical connection before installation.

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

Poor installation environment will affect system performance!

• Install the inverter in a well-ventilated place.

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

• Do not install the inverter in an environment with flammable and explosive ob-

jects or smoke.

Improper handling may cause personal injury!

• When moving the inverter, be aware of its weight and keep the balance to pre-

vent it from tilting or falling.

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

• The bottom terminals and interfaces of the inverter cannot directly contact the

ground or other supports. The inverter cannot be directly placed on the ground.

4.2 Location Requirements

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

performance.

• The inverter with protection rating IP66 can be installed both indoors and outdoors.

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

maintenance.

4.2.3 Angle Requirements

Install the inverter vertically or at the maximum allowable rear tilt angle. Do not install the in-

verter horizontally, forward, excessively backward, sideways, or upside down.

Please consult SUNGROW before tilting backwards the inverter and install it in floating

power plants.

tilting backwards installation requirements

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

bracket to meet the mounting angle requirements, as shown in the figure below.

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

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

necessary.

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

surface.

User Manual 4 Mechanical Mounting

• Bind the cables at the positions 300~350mm away from the DC connector and communi-

cation waterproof terminal.

• The various waterproof terminals should be tightened in accordance with the torque re-

quirements in this manual to ensure that they are tight and sealed.

Contact SUNGORW if you have any question.

4.2.4 Clearance Requirements

Spacing for installing an inverter

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

dissipation.

* In case this distance is less than the distance in the diagram, move the inverter from the

mounting-bracket or wall before maintaining fans.

Spacing for installing multiple inverters

In case of multiple inverters, reserve specific clearance between the inverters. For other in-

stallation scenarios, please refer to the relevant technical documents on http://support.sun-

growpower.com/.

Back to Back Installation

When installing inverters back-to-back, the distance between every two inverters should be

at least 600 mm.

Add a baffle between the two inverters to form a heat dissipation channel. The baffle plate

should be placed horizontally between two inverters and should not block the air outlet of

inverters.

4 Mechanical Mounting User Manual

4.3 Installation Tools

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

use other auxiliary tools on site.

table 4-1 Tool specification

Goggles Earplugs Dust mask Protective gloves

Insulated shoes Utility knife Slotted screwdriver

(M2, M3, M6)

Phillips screwdriver

(M4, M6, M8)

Hammer drill

(φ12)

Pliers Marker Level

User Manual 4 Mechanical Mounting

Rubber mallet Socket wrench set

(M4, M8, M12)

Wrench

(16 mm, 33 mm)

Wrist strap

Wire cutter Wire stripper Hydraulic plier Heat gun

EVO2 terminal

crimping pliers

4–6mm2

EVO2 terminal

wrench

Multimeter

≥ 1100 Vdc

RJ45 crimping tool

Vacuum cleaner Hexagon socket

wrench(T30)

Electric drill (φ12) Scissors

4.4 Moving the Inverter

Before installation, remove the inverter from the packing case and move it to the installation

site.

It is recommended to use the four screw-in handles and the Bottom handles to move the in-

verter. Attach the four screw-in handles to the inverter lugs and base. Lift and move the in-

verter to its destination by means of the bottom handles and the four installed handles.

4 Mechanical Mounting User Manual

figure 4-1 Dimensions of mounting-bracket

4.5.1 PV Bracket-Mounted Installation

Tools

Item Specification

Phillips screwdriver / electric

screw driver

Marker -

Level -

Electric drill Drill bit: φ12

Wrench Opening: 16 mm

Spare parts

Item Quantity Specification Source

Grub screw 2 M4×10 Delivery scope

Bolt assembly 4 M10 Delivery scope

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

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

holes on the PV bracket. Drill the holes by using a electric drill.

4 Mechanical Mounting User Manual

step 3 Secure the mounting-bracket with bolts.

(A) Mounting-bracket (B) Full threaded bolt (C) Metal bracket

(D) Flat washer (E) Spring washer (F) Hex nuts

- - End

4.5.2 Wall-Mounted Installation

Tools

Item Specification

Phillips screwdriver / electric

screw driver

Marker -

Level -

Hammer drill Drill bit: φ12

wrench Opening: 16mm

Spare parts

User Manual 4 Mechanical Mounting

(A) Wall (B) Expansion bolt (C) Mounting-bracket

- - End

4.5.3 Pole-Mounting

Tools

Item Specification

Phillips screwdriver / electric

screw driver

Marker —

Level —

Electric drill * Drill bit: φ12

wrench Opening: 16 mm

* Confirm the need for other sizes of tools based on the bolts of the matching clamps.

Spare parts

Item Quantity Specification Source

Grub screw 2 M4×10 Delivery scope

Bolt assembly 4 M10 Delivery scope

Nut assembly 4 M10 Self-prepared

U-shaped steel 2—Self-prepared

Clamp 3Determined by column

specifications Self-prepared

step 1 Bury the column into the installation site.

Please skip this step if you need to install the inverter on a concrete post, PV

bracket, etc. by holding the post.

step 2 Assemble the mounting-bracket by using the connecting bar.

User Manual 4 Mechanical Mounting

step 3 Mark and punch holes in the U-beam according to the dimensions shown below.

step 4 Use bolts and clamps to fix the U-beam to the column.

4 Mechanical Mounting User Manual

step 5 Use bolts to secure the pegboard to the U-beam.

- - End

4.6 Installing the Inverter

Tools

Item Specification

Phillips screwdriver / electric

screw driver

Spare parts

Item Quantity Specification Source

Grub screw 2 M6×65 Delivery scope

step 1 Take out the inverter from the packing case.

step 2 Hang the inverter to the mounting-bracket and ensure that the mounting ears perfectly en-

gage with the mounting-bracket.

User Manual 4 Mechanical Mounting

• All vacant terminals must be covered with waterproof covers to prevent affect-

ing the protection rating.

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

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

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

inverter.

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

lated to the utility grid.

The cable colors in figures in this manual are for reference only. Please select ca-

bles according to local cable standards.

5.2 Terminal Description

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

5 Electrical Connection User Manual

The screws on the front cover are captive screws. When the front cover is opened,

the screws remain on it.

step 3 Loosen screws on the bottom sealing plate using the supplied hexagon socket wrench, and

remove the sealing plate.

The screws on the sealing plate are captive screws. When the sealing plate is re-

moved, the screws remain on it.

step 4 Cut off the excess part of sealing ring according to cable diameter.

5 Electrical Connection User Manual

Product specificaties

Merk:	Sungrow
Categorie:	Niet gecategoriseerd
Model:	SG125HX

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