SUNGROW SG110CX 110 KW On-grid String Inverter User Manual

SG110CX 110 KW On-grid String Inverter

PV Grid-Connected Inverter User Manual
SG110CX

WWW.SUNGROWPOWER.COM

SG110HX-UEN-Ver18-202106

All Rights Reserved
All Rights Reserved No part of this document can be reproduced in any form or by any means without the prior written permission of Sungrow Power Supply Co., Ltd (hereinafter “SUNGROW”). Trademarks
and other Sungrow trademarks used in this manual are owned by SUNGROW. All other trademarks or registered trademarks mentioned in this manual are owned by their respective owners. Software Licenses · It is prohibited to use data contained in firmware or software developed by SUN-
GROW, in part or in full, for commercial purposes by any means. · It is prohibited to perform reverse engineering, cracking, or any other operations that
compromise the original program design of the software developed by SUNGROW.
I

About This Manual
The manual mainly contains the product information, as well as guidelines for installation, operation and maintenance. The manual does not include complete information about the photovoltaic (PV) system. The reader can get additional information about other devices at www. sungrowpower. com or on the webpage of the respective component manufacturer. Validity This manual is valid for the following inverter models: · SG110CX They will be referred to as “inverter” hereinafter unless otherwise specified. Target Group This manual is intended for inverter owners who will have the ability to interact with the inverter and qualified personnel who are responsible for the installation and commissioning of the inverter. Qualified personnel should have the following skills: · Training for installation and commissioning of electrical system, as well as dealing
with hazards · Knowledge of the manual and other related documents · Knowledge of the local regulations and directives How to Use This Manual Read the manual and other related documents before performing any work on the inverter. Documents must be stored carefully and be available at all times. Contents may be periodically updated or revised due to the product development. The manual content of subsequent versions of the inverter may be subject to change. The latest manual can be found at support.sungrowpower.com. Symbols Important instructions contained in this manual should be followed during installation, operation and maintenance of the inverter. They will be highlighted by the following symbols.
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.
II

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
All Rights Reserved ………………………………………………………………………………………..I About This Manual ………………………………………………………………………………………..II
1 Safety ……………………………………………………………………………………………….. 1
1.1 PV Panels……………………………………………………………………………………….. 1 1.2 Utility Grid ………………………………………………………………………………………. 1 1.3 Inverter ………………………………………………………………………………………….. 2
2 Product Description ………………………………………………………………………… 4
2.1 System Introduction …………………………………………………………………………. 4 2.2 Product Introduction…………………………………………………………………………. 5 2.3 Symbols on the Product ……………………………………………………………………. 7 2.4 LED Indicator ………………………………………………………………………………….. 7 2.5 DC Switch ………………………………………………………………………………………. 8 2.6 Circuit Diagram ……………………………………………………………………………….. 8 2.7 Function Description ………………………………………………………………………… 9
3 Unpacking and Storage ………………………………………………………………… 11
3.1 Unpacking and Inspection ……………………………………………………………….. 11 3.2 Inverter Storage …………………………………………………………………………….. 11
4 Mechanical Mounting …………………………………………………………………… 12
4.1 Safety during Mounting …………………………………………………………………… 12 4.2 Location Requirements …………………………………………………………………… 12
4.2.1 Environment Requirements……………………………………………………… 13 4.2.2 Carrier Requirements……………………………………………………………… 13 4.2.3 Angle Requirements ………………………………………………………………. 13 4.2.4 Clearance Requirements ………………………………………………………… 14 4.3 Installation Tools…………………………………………………………………………….. 15 4.4 Moving the Inverter ………………………………………………………………………… 17 4.4.1 Manual Transport ………………………………………………………………….. 17 4.4.2 Hoisting Transport …………………………………………………………………. 18 4.5 Installing the mounting-bracket ………………………………………………………… 19 4.5.1 PV Bracket-Mounted Installation ………………………………………………. 19 4.5.2 Wall-Mounted Installation ……………………………………………………….. 20
V

4.6 Installing the Inverter ………………………………………………………………………. 21
5 Electrical Connection ……………………………………………………………………. 23
5.1 Safety Instructions………………………………………………………………………….. 23 5.2 Terminal Description……………………………………………………………………….. 23 5.3 Electrical Connection Overview ………………………………………………………… 25 5.4 Crimp OT/DT terminal……………………………………………………………………… 27 5.5 Additional Grounding Connection ……………………………………………………… 28
5.5.1 Additional Grounding Requirements………………………………………….. 28 5.5.2 Connection Procedure ……………………………………………………………. 29 5.6 Opening the Wiring Compartment …………………………………………………….. 29 5.7 AC Cable Connection ……………………………………………………………………… 30 5.7.1 AC Side Requirements ……………………………………………………………. 30 5.7.2 Requirements for OT/DT Terminal …………………………………………….. 32 5.7.3 Connection Procedure(For a multi-core cable)……………………………. 32 5.7.4 Connection Procedure(L1/L2/L3/N, For four single-core
cables)…………………………………………………………………………….. 35 5.7.5 Connection Procedure(L1/L2/L3/PE, For four single-core
cables)…………………………………………………………………………….. 38 5.8 DC Cable Connection ……………………………………………………………………… 41
5.8.1 PV Input Configuration ……………………………………………………………. 41 5.8.2 Assembling the PV Connectors ………………………………………………… 42 5.8.3 Installing the PV Connector ……………………………………………………… 44 5.9 RS485 Connection …………………………………………………………………………. 45 5.9.1 Interface Description………………………………………………………………. 45 5.9.2 RS485 Communication System ……………………………………………….. 46 5.9.3 Connection Procedure(Terminal Block) ……………………………………… 48 5.9.4 Connection Procedure (RJ45 Ethernet Port)……………………………….. 49 5.10 Dry Contact Connection ………………………………………………………………… 51 5.10.1 Dry Contact Function ……………………………………………………………. 51 5.10.2 Wiring Procedure…………………………………………………………………. 53 5.11 DRM ConnectionFor Countries “AU” and “NZ” ……………………… 53 5.11.1 DRM Function …………………………………………………………………….. 53 5.11.2 Connection Procedure ………………………………………………………….. 54 5.12 Closing the Wiring Compartment …………………………………………………….. 55 5.13 Communication Module Connection (optional) ………………………………….. 56
6 Commissioning ………………………………………………………………………………. 57
VI

6.1 Inspection before Commissioning……………………………………………………… 57 6.2 Commissioning Procedure ………………………………………………………………. 57
7 iSolarCloud App ……………………………………………………………………………… 58
7.1 Brief Introduction……………………………………………………………………………. 58 7.2 Installing the App……………………………………………………………………………. 58 7.3 Function Overview …………………………………………………………………………. 59 7.4 Login……………………………………………………………………………………………. 59
7.4.1 Requirements ……………………………………………………………………….. 59 7.4.2 Login Procedure ……………………………………………………………………. 59 7.5 Home page …………………………………………………………………………………… 61 7.6 Run Information …………………………………………………………………………….. 64 7.7 Records ……………………………………………………………………………………….. 65 7.8 More ……………………………………………………………………………………………. 67 7.8.1 System Parameters ……………………………………………………………….. 67 7.8.2 Operation Parameters ……………………………………………………………. 68 7.8.3 Power Regulation Parameters………………………………………………….. 70 7.8.4 Communication Parameters ……………………………………………………. 75 7.8.5 Firmware Update…………………………………………………………………… 75 7.8.6 Password Changing ………………………………………………………………. 76
8 System Decommissioning ……………………………………………………………. 78
8.1 Disconnecting the Inverter……………………………………………………………….. 78 8.2 Dismantling the Inverter…………………………………………………………………… 78 8.3 Disposal of the Inverter……………………………………………………………………. 79
9 Troubleshooting and Maintenance ……………………………………………… 80
9.1 Troubleshooting …………………………………………………………………………….. 80 9.2 Maintenance …………………………………………………………………………………. 89
9.2.1 Maintenance Notices……………………………………………………………… 89 9.2.2 Routine Maintenance……………………………………………………………… 90 9.2.3 Cleaning Air Inlet and Outlet …………………………………………………….. 91 9.2.4 Fan Maintenance ………………………………………………………………….. 91
10 Appendix ………………………………………………………………………………………. 94
10.1 Technical Data …………………………………………………………………………….. 94 10.2 Wring Distance of DI Dry Contact ……………………………………………………. 95 10.3 Quality Assurance ………………………………………………………………………… 97 10.4 Contact Information ……………………………………………………………………… 97
VII

1 Safety
The device has been designed and tested strictly according to international safety regulations. Read all safety instructions carefully prior to any work and observe them at all times when working on or with the device. Incorrect operation or work may cause: · Injury or death to the operator or a third party; · Damage to the device and other properties. All detailed work-related safety warnings and notes are specified at critical points in this manual.
The safety instructions in this manual cannot cover all the precautions that should be followed. Perform operations considering actual onsite conditions. SUNGROW shall not be held liable for any damage caused by violation of the safety instructions in this manual.
1.1 PV Panels
PV strings will produce electrical power when exposed to sunlight and can cause a lethal voltage and an electric shock. · Always keep in mind that the inverter is dual power supplied. Electrical oper-
ators must wear proper personal protective equipment: helmet, insulated footwear, gloves, etc. · Before touching the DC cables, operator must use a measuring device to ensure that the cable is voltage-free. · The opeator must follow all warnings on the PV strings and in its manual.
1.2 Utility Grid
Follow the regulations related to the utility grid.
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1 Safety

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All electrical connections must be in accordance with local and national standards. Only with the permission of the local utility grid company, the inverter can be connected to the utility grid.
1.3 Inverter
Danger to life from electric shocks due to live voltage Do not open the enclosure at any time. Unauthorized opening will void warranty and warranty claims and in most cases terminate the operating license.

Risk of inverter damage or personal injury
· Do not connect or disconnect the PV and AC connectors when the inverter is running.
· Wait at least 5 minutes for the internal capacitors to discharge after all electric devices are removed and the inverter is powered off.
· Ensure that there is no voltage or current before connecting or disconnecting the PV and AC connectors.

All safety instructions, warning labels, and nameplate on the inverter: · Must be clearly legible. · Should not be removed or covered.
Risk of burns due to hot components! Do not touch any hot parts (such as the heat sink) during operation. Only the DC switch can safely be touched at any time.

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1 Safety

Only qualified personnel can perform the country setting. Unauthorized alteration may cause a breach of the type-certificate marking. Risk of inverter damage due to electrostatic discharge (ESD)! By touching the electronic components, you may damage the inverter. For inverter handling, be sure to:
· avoid any unnecessary touching;
· wear a grounding wristband before touching any connectors.

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2 Product Description
2.1 System Introduction
The inverter is a transformerless 3-phase PV grid-connected inverter. As an integral component in the PV power system, the inverter is designed to convert the direct current power generated from the PV modules into grid-compatible AC current and 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.

Item A B C
D E

Description
PV strings
Inverter Grid connection cabinet Transformer Utility grid

Note Monocrystalline silicon, polycrystalline silicon and thin-film without grounding. SG110CX Includes devices such as AC circuit breaker, SPD, metering device. Boost the low voltage from the inverter to grid-compatible medium voltage.
TN-C, TN-S, TN-C-S, TT, IT.

The following figure shows the common grid configurations.

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2 Product Description

2.2 Product Introduction
Model Description The model description is as follows :
Appearance The following figure shows the dimensions of the inverter. The image shown here is for reference only. The actual product received may differ.
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2 Product Description

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figure 2-2 Inverter Appearance

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

No. Name

LED indicator

1

panel

2

Labels

Additional

3

grounding

terminals

4

Bottom handles

5

Side handles

6

Mounting ears

7

Wiring area

Description HMI interface to indicate the present working state of the inverter. Warning symbols, nameplate, and QR code.
2, use at least one of them to ground the inverter.
2, used to move the inverter. 2, used to move the inverter. 4, used to hang the inverter onto the mounting-bracket. DC switches, DC terminals, and communication terminals. For details, refer to”5.2 Terminal Description”

Dimensions The following figure shows the dimensions of the inverter.

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2 Product Description

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

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. Regulatory compliance mark.
CGC-SOLAR mark of conformity. Danger to life due to high voltages! Only qualified personnel can open and service the inverter. Disconnect the inverter from all the external power sources before maintenance! Burn danger due to the hot surface that may exceed 60°C. Do not touch live parts for 5 minutes after disconnection from the power sources. 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.
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2 Product Description

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table 2-1 State description of the LED indicator

LED color

State On Fast blink (Period: 0.2s)

Definition The device is connected to the grid and operating normally. The Bluetooth communication is connected and there is data communication. No system fault occurs.

Blue

Slow blink (Period: 2s)

The device is in standby or startup state (not feeding power into the grid).

A fault occurs and the device cannot connect to the

On

grid.

Twinkling

The Bluetooth communication is connected and there is data communication.

Red

System fault occurs.

Gray

OFF

Both the AC and DC sides are powered down.

2.5 DC Switch
The DC switch is used to disconnect the DC current safely whenever necessary. The SG110CX is equipped with three DC switches, and each DC switch controls its corresponding DC terminals.

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

2.6 Circuit Diagram
The following figure shows the main circuit of the inverter.

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2 Product Description

figure 2-4 Circuit Diagram · The MPPT is utilized for DC input to ensure the maximum power from the PV array at
different PV input conditions. · The inverter circuit converts the DC power into AC power and generates AC power to
loads or utility grid through the AC terminal. · The protection circuit ensures the safe operation of the device and personal safety.
2.7 Function Description
The inverter is equipped with the following functions: Conversion Function The inverter converts the DC current into grid-compatible AC current and feeds the AC current into the grid. Data Storage The inverter logs running information, error records, etc. Parameter Configuration The inverter provides various settable parameters. Users can set parameters via the App to meet the requirements and optimize the performance. Communication Interface The inverter is designed with standard RS485 communication interfaces. The standard RS485 communication interfaces are used to establish communication connection with monitoring devices and upload monitoring data by using communication cables. After communication connection is established, users can view inverter information or set inverter parameters through the iSolarCloud. Protection Function The protective functions are integrated in the inverter, including anti-island protection, LVRT/HVRT, DC reversed polarity protection, AC short circuit protection, leakage current protection, DC overvoltage/overcurrent 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.
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2 Product Description

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· 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.

· Before enabling the PID recovery function, make sure the voltage polarity of the PV modules to ground meets requirement. If there are any questions, contact the PV module manufacturer or read the corresponding user manual.
· If the voltage scheme for the PID protection / recovery function does not meet the requirement of corresponding PV modules, the PID will not work as expected or even damage the PV modules.
· PID recovery function and Q at night cannot be enabled at the same time.
· If the PID recovery function is enabled, it only works at night.
· PID recovery function and Q at night cannot be enabled at the same time.
· After the PID recovery function is enabled, the voltage of the PV string to ground is 500Vdc by default, and the default value can be modified through the App.

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3 Unpacking and Storage
3.1 Unpacking and Inspection
The device is thoroughly tested and strictly inspected before delivery. Nonetheless, damage may still occur during shipping. For this reason, please conduct a thorough inspection after receiving the device. · 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 device is decommissioned.
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
relative humidity must be always between 0 and 95 %, non-condensing. · In case of stacking storage, the number of stacking layers should never exceed the
limit marked on the outer side of the packing case. · The packing case should be upright. · If the inverter has been stored more than half a year, the qualified personnel should
thoroughly check and test it before installation.
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4 Mechanical Mounting
Respect all local standards and requirements during mechanical installation.
4.1 Safety during Mounting
Make sure there is no electrical connection before installation. In order to avoid electric shock or other injury, make sure that holes will not be drilled over any electricity or plumbing installations.
Risk of injury due to improper handling · Always follow the instructions when moving and positioning the inverter. · Improper operation may cause injuries or serious wounds. In the case of poor ventilation, the system performance may compromise. · Keep the heat sinks uncovered to ensure heat dissipation performance.
4.2 Location Requirements
Select an optimal mounting location for safe operation, long service life and 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.
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4.2.1 Environment Requirements
· The installation environment must be free of inflammable or explosive materials. · The location should be not accessible to children. · The ambient temperature and relative humidity must meet the following
requirements.

· Do not install the inverter outdoors in areas with high salinity, which mainly refer to the areas within 500 m away from the coast. The deposition of salt fog varies largely with nearby seawater characteristics, sea wind, precipitation, relative humidity, terrain, and forest coverage.
· Avoid direct exposure to sun, rain and snow.
· The inverter should be well ventilated. Ensure air circulation.
· Never install the inverter in living areas. The inverter will generate noise during operation, affecting daily life.
4.2.2 Carrier Requirements
The concrete wall should be capable of withstanding a force of four times the weight of the inverter and be suitable for the dimensions of the inverter. The installation carrier should meet the following requirements:

4.2.3 Angle Requirements Install the inverter vertically or at the maximum allowable rear tilt angle. Do not install the inverter horizontally, forward, excessively backward, sideways, or upside down.
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4 Mechanical Mounting

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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 meas-
ures if necessary. · Ensure that the waterproof connectors are at least 300mm higher than the
ground surface. · Bind the cables at the positions 300~350mm away from the DC connector,
AC waterproof terminal, and communication waterproof terminal. · The various waterproof terminals should be tightened in accordance with
the torque requirements in this manual to ensure that they are tight and sealed. Contact SUNGORW if you have any question. 4.2.4 Clearance Requirements Reserve enough clearance around the inverter to ensure sufficient space for heat dissipation.
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• In case the distance is less than 800 mm, move the inverter from the mounting-bracket or wall before maintaining fans. In case of multiple inverters, reserve specific clearance between the inverters. For other installation scenarios, please refer to the relevant technical documents on http://support. sungrowpower.com/.
  In case of back-to-back installation, reserve specific clearance between the two inverters.
  Install the inverter at an appropriate height for ease of viewing LED indicator and operating switch(es).
  4.3 Installation Tools
  Installation tools include but are not limited to the following recommended ones. If necessary, use other auxiliary tools on site.
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4 Mechanical Mounting table 4-1 Tool specification

User Manual

Goggles

Earplugs

Dust mask

Protective gloves

Insulated shoes

Utility knife

Slotted screwdriver Phillips screwdriver

(M2, M6)

(M4, M6, M8)

Hammer drill (12, 14)

Pliers

Marker

Level

Rubber mallet

Socket wrench set (16mm)

Wrench (13 mm, 16 mm)

Wrist strap

Wire cutter

Wire stripper

Hydraulic plier

Heat gun

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MC4 terminal crimping pliers
4­6mm2

MC4 terminal wrench

Multimeter 1100 Vdc

4 Mechanical Mounting
RJ45 crimping tool

Vacuum cleaner
4.4 Moving the Inverter
Before installation, remove the inverter from the packing case and move it to the installation site. Follow the instructions below as you move the inverter: · Always be aware of the weight of the inverter. · Lift the inverter using the handles positioned on both sides of the inverter. · Move the inverter by one or two people or by using a proper transport tool. · Do not release the equipment unless it has been firmly secured. 4.4.1 Manual Transport step 1 Release the sealing screws on the mounting ears with a flat-head screwdriver and store them properly. Anchor the four supplied screw-in handles to the mounting ears and base of the inverter.

step 2 Lift and move the inverter to the destination by using the side and bottom handles as well as the four installed handles.
step 3 Remove the screw-in handles and reassemble the sealing screws released in Step 1.
Inappropriate moving operation may cause personal injury! It is recommended that at least four installers carry the inverter together and wear protective equipment such as smash-proof shoes and gloves. Always beware of the gravity center of the inverter and avoid tipping.
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The ground surface on which the inverter is to be placed should be covered with a sponge pad, foam cushion or the like to prevent the inverter bottom from scratches.
– – End 4.4.2 Hoisting Transport step 1 Release the sealing screws on the mounting ears and store them properly. Anchor two
M12 thread lifting rings to the hangers of the inverter.

step 2 Lead the sling through the two lifting rings and fasten the tie-down strap.
step 3 Hoist the inverter, and stop to check for safety when the inverter is 100mm above the ground. Continue hoisting the device to the destination after ensuring the safety.

step 4 Remove the lifting rings and reassemble the sealing screws released in Step 1. 18

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4 Mechanical Mounting

Keep the inverter balanced throughout the hoisting process and avoid collisions with walls or other objects. Stop hoisting in the event of severe weather, such as heavy rain, thick fog, or strong wind.
The lifting rings and the sling are not within the delivery scope.
– – End
4.5 Installing the mounting-bracket
Inverter is installed on the wall and bracket by means of mounting bracket. The expansion plug set shown below is recommended for the installation.

figure 4-1 Dimensions of mounting-bracket
4.5.1 PV Bracket-Mounted Installation 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 hammer drill.
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4 Mechanical Mounting
step 3 Secure the mounting-bracket with bolts.

User Manual

No.

Components

A

Mounting-bracket

B

Full threaded bolt

C

Metal bracket

D

Flat washer

E

Spring washer

F

Hex nuts

Description
­ M10*45 ­ ­ ­ M10

– – End 4.5.2 Wall-Mounted Installation step 1 Assemble the mounting-bracket by using the connecting bar.

step 2 Level the assembled mounting-bracket by using the level, and mark the positions for drilling holes on the installation site.
step 3 Insert the expansion bolts into the holes and secure them with a rubber hammer. Fasten the nut with a wrench to expand the bolt. Remove the nut, spring washer, and flat washer, and store them properly.
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step 4 Fix the mounting-bracket with the expansion bolts.

No. A B
C
– – End

Components Wall
Expansion bolt
Mountingbracket

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

4.6 Installing the Inverter
step 1 Take out the inverter from the packing case. step 2 Hoist the inverter to the installation position when necessary (refer to “”4.4.2 Hoisting
Transport””). If the installation position is not high enough, skip this step. step 3 Hang the inverter to the mounting-bracket and ensure that the mounting ears perfectly
engage with the mounting-bracket.

step 4 Fix the inverter with screws. 21

4 Mechanical Mounting
– – End

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22

5 Electrical Connection
5.1 Safety Instructions
Prior to any electrical connections, keep in mind that the inverter has dual power supplies. It is mandatory for the qualified personnel to wear personal protective equipments (PPE) during the electrical work.
Danger to life due to a high voltage inside the inverter! · The PV string will generate lethal high voltage when exposed to sunlight. · Before starting electrical connections, disconnect the DC switch and AC cir-
cuit breakers and prevent them from inadvertent reconnection. · Ensure that all cables are voltage free before performing cable connection.
· Any improper operations during cable connection can cause device damage or personal injury.
· Only qualified personnel can perform cable connection. · All cables must be undamaged, firmly attached, properly insulated and ad-
equately dimensioned.
Comply with the safety instructions related to the PV strings and the regulations related to the utility grid. · All electrical connections must be in accordance with local and national
standards. · Only with the permission of the local utility grid company, the inverter can be
connected to the utility grid.
5.2 Terminal Description
All electrical terminals are located at the bottom of the inverter.
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figure 5-1 Terminal Description(For a multi-core cable)
figure 5-2 Terminal Description(For four single-core cables) * The image shown here is for reference only. The actual product received may differ. 24

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5 Electrical Connection

Item Terminal

A

PV terminals

Mark +/-

Communica- COM1 / 2 / 3 B
tion terminal COM4

AC wiring

C

terminal

Standby

AC

D

grounding

terminal*

Additional

E

grounding

terminal

Note MC4 PV connector RS485 communication, digital input/output DI/DO. For communication module connection. Used for AC output cable connection.
Used for internal grounding.
use at least one of them to ground the inverter.

*If the PE cable is an independent single-core cable, it should be inserted into the cabinet through the standby grounding terminal.

5.3 Electrical Connection Overview
The electrical connection should be realized as follows:

Item A B C D E

Designation PV string Inverter Grid Monitoring device AC circuit breaker

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table 5-1 Cable Requirements

Specification

No. Cable

Type

Cable Diam- Cross-sectional Area

eter(mm)

(mm2)

PV cable comply-

1

DC cable ing with 1,500V

6~9

4~6

standard

Additional Outdoor single-

2

grounding core copper wire The same as that of the PE wire in the AC

cable

cable

cable

Four/Five-core

outdoor copper or
aluminum cable(1)
(2)

38 ~ 56

3

AC cable

Four single-core

outdoor copper or
aluminum cables
(1)(2)

14 ~ 32

L1,L2,L3,(N) wire: 70 ~ 240 PE wire: refer to “table 52 PE Wire Requirements” L1,L2,L3,(N) wire: 70 ~ 240 PE wire: refer to “table 52 PE Wire Requirements”

Shielded twisted

Commu- pair (terminal

4

nication block)

4.5 ~ 18

0.1 ~ 1.5

cable

CAT-5 Ethernet

cable (RJ45)

/

(1) A copper to aluminum adapter terminal is required when an aluminum cable is used. For details, refer to ” Aluminium Cable Requirements”. (2) In the case of four single-core cables, a spare AC sealing plate accessory is required as shown in the following figure. To purchase the AC sealing plate accessory, contact SUNGROW.

figure 5-3 Spare AC Sealing Plate Inverter for Australia and New Zealand are equipped with the four-core sealing plate by default.
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table 5-2 PE Wire Requirements

PE Wire Cross Section S

PE Wire Cross Section

S > 35 mm2

S/2

Note
The specifications are valid only when the phase wire and PE wire use the same material. If otherwise, ensure that the cross section of the PE wire produces a conductance equivalent to that of the wire specified in the table.

5.4 Crimp OT/DT terminal
Crimp OT/DT terminal

1. Heat shrink tubing 3. Hydraulic pliers

2. OT/DT terminal 4. Heat gun

Aluminium Cable Requirements If an aluminium cable is selected, use a copper to aluminium adapter terminal to avoid direct contact between the copper bar and the aluminium cable.

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figure 5-4 Aluminium cable terminal connection sequence

1. Copper to Aluminium adapter terminal

2. Flange nut 3. Aluminium cable

Ensure that the selected terminal can directly contact with the copper bar. If there are any problems, contact the terminal manufacturer.
Direct contact between the copper bar and the aluminium cable will cause electrochemical corrosion and impair the reliability of electrical connection.

5.5 Additional Grounding Connection

· Since the inverter is transformerless, neither the negative pole nor the positive pole of the PV string can be grounded. Otherwise, the inverter will not operate normally.
· Connect the additional grounding terminal to the protective grounding point before AC cable connection, PV cable connection, and communication cable connection.
· The ground connection of this additional grounding terminal cannot replace the connection of the PE terminal of the AC cable. Make sure those terminals are both grounded reliably. SUNGROW shall not be held liable for any damage caused by the violation.
5.5.1 Additional Grounding Requirements
All non-current carrying metal parts and device enclosures in the PV power system should be grounded, for example, mounts of PV modules and the inverter enclosure. When there is only one inverter in the PV system, connect the additional grounding cable to a nearby grounding point. When there are multiple inverters in the PV system, connect grounding points of all inverters and the PV array frames to the equipotential cable (according to the onsite conditions) to implement an equipotential connection.
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5.5.2 Connection Procedure step 1 Prepare the cable and OT/DT terminal,refer to ” Crimp OT/DT terminal”. step 2 Remove the screw on the grounding terminal and fasten the cable with a screwdriver.

step 3 Apply paint to the grounding terminal to ensure corrosion resistance.
The grounding screws have been anchored to the side of the inverter before delivery, and do not need to be prepared. There are two grounding terminals. Use at least one of them to ground the inverter.
– – End
5.6 Opening the Wiring Compartment
step 1 Release two screws on the front cover of the wiring compartment with supplied Allen wrench.
step 2 Open the wiring compartment.

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step 3 Keep the wiring compartment open during wiring through the limit lever attached to the cover.
– – End Close the wiring compartment in reverse order after completing wiring operations.
5.7 AC Cable Connection
5.7.1 AC Side Requirements Connect the inverter to the grid only after getting an approval from the local electric power company.
Before connecting the inverter to the grid, ensure the grid voltage and frequency comply with requirements, for which, refer to “Technical Date”. Otherwise, contact the electric power company for help.
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AC Circuit Breaker An independent circuit breaker or fuse is installed on the output side of the inverter to ensure safe disconnection from the grid.

Inverter Model SG110CX

Recommended rated voltage 400V

Recommended rated current 200A

Never connect a load between the inverter and the circuit breaker. Multiple inverters cannot share one circuit breaker.
Multiple Inverters in Parallel Connection If multiple inverters are connected in parallel to the grid, ensure that the total number of parallel inverters does not exceed 25. Otherwise, please contact SUNGROW for technical scheme.
MV Transformer The MV transformer used together with the inverter should meet the following requirements:
· The transformer may be a distribution transformer, and it must be designed for the typical cyclical loads of a PV system (load in the day and no load at night).
· The transformer may be of the liquid-immersed type or dry type, and shield winding is not necessary.
· The line-to-line voltage on the LV side of the transformer should endure the output voltage of inverter. When the transformer is connected to the IT grid, to-ground withstanding voltage of the LV winding of the transformer, the LV side AC cables, and the LV side secondary equipment (including the relay protection device, detection & measuring device, and other related auxiliary devices) should not be lower than 1,100V.
· The line-to-line voltage on the HV side of the transformer should comply with the local power grid voltage.
· A transformer with a tap changer on the HV side is recommended in order to keep consistent with the grid voltage.
· At an ambient temperature of 45, the transformer can run in 1.1 times of load for long time.
· A transformer with a short-circuit impedance 6% (permissible tolerance: ±10%) is recommended.
· The voltage drop of system cable is no more than 3%. · The DC component that the transformer can withstand is 1% of the fundamental cur-
rent at rated power.
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· For thermal rating, the load curve of the transformer and environment conditions should be taken into account.
· The apparent power of the inverter should never exceed the power of the transformer. The maximum AC current of all inverters connected in parallel must be taken into account. If more than 25 inverters are connected to the grid, contact SUNGROW.
· The transformer must be protected against overloading and short circuit.
· The transformer is an important part of grid-connected PV generation system. The fault tolerance capacity of the transformer should be taken into account at all times. The fault include: system short circuit, grounding fault, voltage drop, etc.
· Take ambient temperature, relative humidity, altitude, air quality, and other environmental conditions into account when selecting and installing the transformer.
5.7.2 Requirements for OT/DT Terminal
OT/DT terminals (not included in the delivery scope) are required for fixing AC cables to the terminal block. Purchase the OT/DT terminals according to the following requirements. OT/DT Terminals of Phase Wire
· Specification: M12;
· Dimensions: a46 mm / 13 mmb15.5 mm / c22 mm

OT/DT Terminal of PE Wire · Specification: M8 / M10. 5.7.3 Connection Procedure(For a multi-core cable)
In this manual, description is given by using five-core cable as an example. The wiring of the four-core cable is the same.
step 1 Open the wiring compartment. For details, refer to “5.6 Opening the Wiring Compartment”.
step 2 Disconnect the AC-side circuit breaker and prevent it from inadvertent reconnection. step 3 Loosen the swivel nut of the AC waterproof connector and select a seal according to
the cable outer diameter, remove the inner sealing ring if the cable diameter is larger than 47 mm. Lead the cable through the swivel nut, seal, and wiring terminal successively.

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step 4 Remove the protection cover and store the released screws properly.
step 5 Strip the protection layer and insulation layer by specific length, as described in the figure below.
step 6 Make the cable and crimp OT/DT terminal. step 7 Secure the wires to corresponding terminals.
Note the terminal positions of PE wire and N wire. If a phase wire is connected to the PE terminal or N terminal, unrecoverable damage may be caused to the inverter.
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Ensure that the depth L of the socket used is not less than 28mm.
step 8 Gently pull the cable backwards to ensure firm connection, and fasten the swivel nut clockwise.

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If the PE cable is an independent single-core cable, it should be inserted into the cabinet through the standby grounding terminal.

step 9 Install the protection cover

– – End 5.7.4 Connection Procedure(L1/L2/L3/N, For four single-core cables) step 1 Open the wiring compartment. For details, refer to”5.6 Opening the Wiring
Compartment”. step 2 Disconnect the AC-side circuit breaker and prevent it from inadvertent reconnection. step 3 Loosen the swivel nut of the AC waterproof connector and select a seal according to
the cable outer diameter, remove the inner sealing ring if the cable diameter is larger than 22 mm. Lead the cable through the swivel nut, seal, and wiring terminal successively.
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step 4 Remove the protection cover and store the released screws properly.
step 5 Strip the protection layer and insulation layer by specific length, as described in the figure below.
step 6 Make the cable and crimp OT/DT terminal. step 7 Secure the wires to corresponding terminals.
Note the terminal positions of PE wire and N wire. If a phase wire is connected to the PE terminal or N terminal, unrecoverable damage may be caused to the inverter. 36

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Ensure that the depth L of the socket used is not less than 28mm.
step 8 Gently pull the cable backwards to ensure firm connection, and fasten the swivel nut clockwise.
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– – End
5.7.5 Connection Procedure(L1/L2/L3/PE, For four single-core cables)
step 1 Open the wiring compartment. For details, refer to”5.6 Opening the Wiring Compartment”.
step 2 Disconnect the AC-side circuit breaker and prevent it from inadvertent reconnection.
step 3 Loosen the swivel nut of the AC waterproof connector and select a seal according to the cable outer diameter, remove the inner sealing ring if the cable diameter is larger than 22 mm . Lead the cable through the swivel nut, seal, and wiring terminal successively.

step 4 Remove the protection cover and store the released screws properly. 38

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step 5 Strip the protection layer and insulation layer by specific length, as described in the figure below.
step 6 Make the cable and crimp OT/DT terminal. step 7 Secure the wires to corresponding terminals.

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Ensure that the depth L of the socket used is not less than 28mm.

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

step 9 Install the protection cover – – End
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5.8 DC Cable Connection

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Danger of electric shock! The PV array will generate lethal high voltage once exposed to sunlight.

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

Risk of inverter damage! Observe the following requirements. Failure to do so will void guarantee and warranty claims.
· Make sure the maximum DC voltage and the maximum short circuit current of any string never exceed inverter permitted values specified in “Technical Data”.
· Mixed use of different brand or model of PV modules in a PV string or a compromised PV string design composed with PV modules from rooftoops of different orientation may not damage inverter but will cause system bad performance!
· The inverter enters standby state when the input voltage ranges between 1,000 V and 1,100 V. The inverter returns to running state once the voltage returns to the MPPT operating voltage range, namely, 200 V to 1,000 V.
5.8.1 PV Input Configuration
As shown in the figure below, the inverter is provided with multiple PV inputs: PV inputs 1~9; and each PV input is designed with an MPP tracker. Each PV input operates independently and has its own MPPT. In this way, string structures of each PV input may differ from each other, including PV module type, number of PV modules in each string, angle of tilt, and installation orientation. Each PV input area includes two DC inputs DC1 and DC2. For the best use of DC power, DC1 and DC2 should be the same in PV string structure, including the type, number, tilt, and orientation of the PV modules.

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Type SG110CX

Open Circuit Voltage Limit 1100V

5.8.2 Assembling the PV Connectors

Max. Current for Input Connector 30A

High voltage may be present in the inverter! · Ensure all cables are voltage- free before performing electrical operations. · Do not connect the AC circuit breaker before finishing electrical connection.

· Use MC4 DC terminals if the maximum input voltage is no more than 1,000 V.
· Use MC4-Evo2 DC terminals if the maximum input voltage is greater than 1,000 V. To purchase the MC4-Evo2 DC terminals, contact SUNGROW.
· Select appropriate DC terminals as required above. Otherwise, SUNGROW shall be held no liability for the damage caused.

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SUNGROW provides corresponding PV connectors in the scope of delivery for quick connection of PV inputs. To ensure IP66 protection, use only the supplied connector or the connector with the same ingress of protection.
step 1 Strip 7 mm­8 mm of the insulation from each PV cable.

step 2 Assemble the cable ends with the crimping pliers.

1: Positive crimp contact

2Negative crimp contact

step 3 Lead the cable through cable gland, and insert the crimp contact into the insulator until it snaps into place. Gently pull the cable backward to ensure firm connection. Tighten the cable gland and the insulator (torque 2.5 N.m to 3 N.m).

step 4 Check for polarity correctness.
If the PV polarity is reversed, the inverter will be in a fault or alarm state and will not operate normally. – – End
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5.8.3 Installing the PV Connector step 1 Rotate the DC switch to “OFF” position.

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step 2 Check the cable connection of the PV string for polarity correctness and ensure that the open circuit voltage in any case does not exceed the inverter input limit of 1,100V.

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

· Check the positive and negative polarity of the PV strings, and connect the PV connectors to corresponding terminals only after ensuring polarity correctness.
· Arc or contactor over-temperature may occur if the PV connectors are not firmly connected in place, and SUNGROW shall not be held liable for any damage caused due to this operation.
step 4 Follow the foregoing steps to connect PV connectors of other PV strings. step 5 Seal any unused PV terminal with a terminal cap.
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If the DC input is connected inversely and the DC switch has been rotated to “ON”, do not operate immediately. Otherwise, the equipment may be damaged. Please turn the DC switch to “OFF” and remove the DC connector to adjust the polarity of the strings when the string current is lower than 0.5A.
– – End
5.9 RS485 Connection
5.9.1 Interface Description The following figure shows the position of the communication wiring board as well as the terminals equipped for the wiring board.

The inverter is equipped with two groups of RS485 communication port for external communication connection, which are RS485_1 port and RS485_2 port. The port RS485_1 is used to connect Logger, so as to implement data exchange with PC or other monitoring devices. Terminal definitions of the port are as follows:

table 5-3 RS485_1 port terminal definition (Terminal block)

No

Definition

A1

RS485 A IN, RS485A differential signal+

B1

RS485 B IN, RS485B differential signal-

PE

GND, shielded earthing point

A1

RS485 A OUT, RS485A differential signal+

B1

RS485 B OUT, RS485B differential signal-

PE

GND, shielded earthing point

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table 5-4 RS485_1 port terminal definition (RJ45)

No PIN1~2 PIN3 PIN4~5 PIN6 PIN7~8

Definition N/A RS485 B, RS485B differential signalN/A RS485 A, RS485A differential signal+ N/A

The terminal block interface and RJ45 interface have the same function with different wiring manner. Select either interface for cable connection. When multiple inverters are connected in the RS485 daisy chain, a 120 terminating resistor can be connected between the A and B communication cables through the RS485-dip switch, to ensure communication quality.

The RS485_1 interface is marked as SW1.
5.9.2 RS485 Communication System Single-inverter Communication System In case of a single inverter, communication cable connection requires only one RS485 cable.

Multi-inverter Communication System In case of multiple inverters, all the inverters can be connected via RS485 cables in the daisy chain manner.
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figure 5-5 Multi-inverter Communication SystemRS485_1 InterfaceTerminal Block

figure 5-6 Multi-inverter Communication SystemRS485_1 InterfaceRJ45 When more than 15 inverters are connected to the same daisy chain, in order to ensure the communication quality, the Logger at the first end of the daisy chain needs to be equipped with a terminal resistor of 120, the inverter at the last end needs to be equipped with a RS485-dip switch (SW1), and the shielding layer of the communication cable should be single-point grounded.
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figure 5-7 Configuration of Dip Switch (N15) The length of the RS485 cable and twisted pair cable should be no longer than 1,200m. If multiple inverters are connected to the data collector Logger3000, the number of permissible daisy chains and the number of devices allowed to be connected should meet the requirements (refer to the user manual for the Logger3000).
5.9.3 Connection Procedure(Terminal Block) RS485 communication cables should be shielded twisted pair cables or shielded twisted pair Ethernet cables. There are three communication terminals, and the silkscreen marks are COM1/COM2/COM3. Please choose according to the actual situation.
step 1 Strip the protection layer and insulation layer by appropriate length.
step 2 Loosen the swivel nut of the junction box and select an appropriate seal according to cable outer diameter. Lead the cable through the swivel nut, seal, and junction box successively.
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Outer Diameter D(mm) 4.5 ~ 6 6 ~ 12 12 ~ 18

Seal c a+b b

step 3 Secure the cable to the terminal base.

step 4 Insert the terminal base into the corresponding terminal. step 5 Pull the cable gently to make sure it is secured, tighten the swivel nut clockwise.

– – End 5.9.4 Connection Procedure (RJ45 Ethernet Port) step 1 Loosen the swivel nut of the junction box and select an appropriate seal according to
cable outer diameter. Lead the cable through the swivel nut, seal, and junction box successively.
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Outer Diameter D(mm) 4.5 ~ 6 6 ~ 12 12 ~ 18

Seal c a+b b

step 2 Strip the insulation layer of the Ethernet cable with a wire stripper, and insert the signal wires to the RJ45 connector(Pin 3 and Pin 6 are for communication connection). Crimp the RJ45 connector with a crimping tool.

step 3 Insert the RJ45 connector to the RJ45 jack. step 4 Pull the cable gently to make sure it is secured, tighten the swivel nut clockwise. 50

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– – End
5.10 Dry Contact Connection
Dry contact cables require a cross section of 1 mm2 to 1.5 mm2. The connection procedure of the dry contact is the same as that of the RS485 terminal block.
5.10.1 Dry Contact Function The configuration circuit board is provided with fault output dry contact and emergency stop dry contact, as shown in the figure below. Connection method of the dry contacts is similar to that of the RS485 terminal block.

DO terminal (fault output dry contact): The relay can be set to output fault alarms, and user can configure it to be a normally open contact (COM NO) or a normally closed contact (COMNC). The relay is initially at the NC terminal, and it will trip to another contact when a fault occurs. When alarm occurs, signal status change will not be triggered. Use LED indicators or other equipment to indicate whether the inverter is in the faulty state. The following Figures show the typical applications of normally open contact and normally closed contact:
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figure 5-8 Normal open contact

figure 5-9 Normal close contact

Devices connected to the relay should comply with related requirements:

AC-Side Requirements Max. voltage: 125Vac Max. current: 5A

DC-Side Requirements Max. voltage: 30Vdc Max. current: 5A

DI terminal (emergency stop dry contact): the dry contact can be configured to be an emergency stop contact. When the DI + contact and DIcontact are shorted by external controlled switch (The external switch can be configured as normally open contact or normally closed contact), the inverter will immediately shutdown. NS terminal: NS Protection is used for German market currently. For plant sized more than 30kVA, inverter NS Protection terminals could be used in daisy chain to external NS Protection Relay to realize emergency stop when NS Protection Relay change its dry contact status due to the grid abnormal running status. NS Protection (including Passive Valid) can be set. When NS Protection is enabled on the iSolarCloud, the inverters will operate normally when DI + contact and DIcontact are shorted by external controlled switch, and the inverters will emergently stop when DI + contact and DI contact are disconnected.

The dry contacts only support passive switch signal input.

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

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figure 5-10 Local stop contact
figure 5-11 Daisy chain topology When wiring DI dry contacts, ensure that the maximum wiring distance meet the requirements in “10.2 Wring Distance of DI Dry Contact”.
5.10.2 Wiring Procedure Refer to the wiring of terminal block described in chapter”5.9.3 Connection Procedure (Terminal Block)” to implement fault output, emergency shutdown and NS protection. For NS protection(including passive valid), enable the function on iSolarCloud, refer to “7.8.2 Operation Parameters”.
5.11 DRM ConnectionFor Countries “AU” and “NZ”
5.11.1 DRM Function The inverter supports the demand response modes as specified in the standard AS/NZS 4777. The inverter has integrated a terminal for connecting to a DRED. After the connection, the method of asserting DRMs as specified in the follow table.
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The mode DRM0 is supported by the inverter.

table 5-5 Method of Asserting DRMs

Mode DRM0

Method of Asserting Asserted by shorting pins 5 and 6 Asserted when the impedance between pins 5 and 6 is detected to be above 20k

Enable the DRM function through the iSolarCloud APP. If there are any problems, contact SUNGROW. The DRM function is only applicable to devices for Australia and New Zealand.
5.11.2 Connection Procedure step 1 Strip the insulation layer of the Ethernet cable with a wire stripper, and insert the signal
wires to the RJ45 connector. Crimp the RJ45 connector with a crimping tool.

step 2 Loosen the swivel nut and select an appropriate seal according to cable outer diameter. Lead the cable through the swivel nut, and seal successively.

Outer Diameter D (mm)
4.5 ~ 6 6 ~ 12 13 ~ 18

Seal
c a+b b

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step 3 Insert the RJ45 connector to the RJ45 jack.

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step 4 Pull the cable gently to make sure it is secured, tighten the swivel nut clockwise. – – End
5.12 Closing the Wiring Compartment
step 1 Release the limit lever.

step 2 Close the wiring compartment and tighten the two screws on its front cover with supplied Allen wrench.

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5.13 Communication Module Connection (optional)

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Connect the communication module produced by SUNGROW to the communication accessory port. After successful connection, information such as power generation and running state of the inverter can be viewed via the APP on the phone.

*The image shown here is for reference only. The actual product you receive may differ.
Once the communication module is in use, do not connect the inverter to a 3rd party data logger at the same time via RS485.
For details on module installation and configuration, refer to the manual delivered together with the module.

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6 Commissioning
6.1 Inspection before Commissioning
Check the following items before starting the inverter: · All equipment has been reliably installed. · DC and AC switches are in the “OFF” position. · The ground cable is properly and reliably connected. · The AC cable is properly and reliably connected. · The DC cable is properly and reliably connected. · The communication cable is properly and reliably connected. · The vacant terminals are sealed. · No foreign items, such as tools, are left on the top of the machine or in the junction
box (if there is). · The AC circuit breaker is selected in accordance with the requirements of this man-
ual and local standards. · All warning signs & labels are intact and legible.
6.2 Commissioning Procedure
If all of the items mentioned above meet the requirements, proceed as follows to start up the inverter for the first time. step 1 Connect the AC switch between the inverter and the grid. step 2 Rotate the DC switch of the inverter to “ON” position. step 3 Connect the DC switch (if applicable) between the inverter and the PV string. step 4 Set initial protection parameters via the iSolarCloud App. For details, please refer to “7.2 Installing the App”, and “7.4.2 Login Procedure”. If the irradiation and grid conditions meet requirements, the inverter will normally operate. step 5 Observe the LED indicator to ensure that the inverter operates normally. Refer to “2.4 LED Indicator” for details. – – End
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7.1 Brief Introduction
The iSolarCloud App can establish communication connection to the inverter via the Bluetooth, thereby achieving near-end maintenance on the inverter. Users can use the App to view basic information, alarms, and events, set parameters, or download logs, etc. *In case the communication module Eye, WiFi or WiNet-S is available, the iSolarCloud App can also establish communication connection to the inverter via the mobile data or WiFi, thereby achieving remote maintenance on the inverter.
· This manual describes only how to achieve near-end maintenance via the Bluetooth connection. For remote maintenance through the Eye, WiFi or WiNet-S, refer to the related manuals in the delivery scope.
· Screenshots in this manual are based on the Android system V2.1.6 , and the actual interfaces may differ.
7.2 Installing the App
Method 1 Download and install the App through the following application stores: · MyApp (Android, mainland China users) · Google Play (Android, users other than mainland China ones) · App Store (iOS) Method 2 Scan the following QR code to download and install the App according to the prompt information.
The App icon appears on the home screen after installation.
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7.3 Function Overview
The App provides parameter viewing and setting functions, as shown in the following figure.
figure 7-1 App function tree map
7.4 Login
7.4.1 Requirements The following requirements should be met: · The AC or DC side of the inverter is powered-on. · The mobile phone is within 5 meters away from the inverter and there are no obstructions in between. · The Bluetooth function of the mobile phone is enabled.
7.4.2 Login Procedure step 1 Open the App to enter the login page, click on “Local Access” at the bottom of the page
to go to the next page. step 2 Click on “Bluetooth”, after which the Bluetooth search screen pops up automatically,
and select the to-be-connected inverter according the SN on the nameplate of the inverter. The Bluetooth indicator gets on once the connection is established. Alternatively, tap to scan the QR code on the side of the inverter to establish Bluetooth connection.
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figure 7-2 Bluetooth Connection step 3 Enter the login screen after the Bluetooth connection is established.
figure 7-3 Login The username is “user”and the initial password is “pw1111” or “111111” which should be changed for the consideration of account security. To set inverter parameters related to grid protection and grid support, contact SUNGROW to obtain the advanced account and corresponding password. step 4 If the inverter is not initialized, you will enter the quick setting screen of initializing protection parameter. After finishing setting on the quick setting screen, click “TURN ON DEVICE” and the device will be initialized. The App will send start instructions and the device will start and operate.
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figure 7-4 Initialization Protection Parameter
Reset the protection parameters if the country setting is incorrect. Otherwise, a fault may occur.
In the European region, such as Sweden, Ireland, Hungary, Portugal, Romania, Greece, Ukraine etc. whose grid code complies with EN50549, select the parameter EN50549_1 (LV grid- connection) or EN50549_2 (MV grid-connection) with proper manual settings. In the Brazilian region, set the country code as “Brazil”. Selecting “Brazil_230” or “Brazil_240” will cause setting failure. step 5 If the inverter is initialized, the App automatically turns to its home page. – – End
7.5 Home page
After login, the home page is as follows:
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figure 7-5 Home Page

table 7-1 Home Page Description

No.

Designation

Description

1

Date and time

System date and time of the inverter.

Present operation state of the inverter. For details, refer

2

Inverter state

to “table 7-2 Description of Inverter State”.

3

PID state

Present state of the PID. For details, refer to “table 7-3 Description of PID State”.

Displays the PV power generation power, feed-in power,

etc. The line with an arrow indicates energy flow be-

4

Power flow chart tween connected devices, and the arrow pointing indi-

cates energy flow direction.

Power

5

generation

Today power yield and accumulative power yield of the inverter.

6

Real-time power Output power of the inverter.

Shows the change of power between 5 am and 23 pm

every day

7

Power curve

(Each point on the curve represents the percentage of

present inverter power to rated power).

8

Navigation bar Including “Home”, “Run-info”, “His-record”, and “More”.

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table 7-2 Description of Inverter State

State

Description

After being energized, the inverter tracks the PV arrays’ maximum

Run

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

the normal operation mode.

Stop

The inverter is stopped.

Press to Shut Down

The inverter will stop operation by manually “stop” via app. In this way, inverter internal DSP stops. To restart the inverter, manually start via app.

Standby

Inverter enters standby mode when DC side input is insufficient. In this mode the inverter will wait within the standby duration.

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

Starting Up The inverter is initializing and synchronizing with the grid.

Warn Run Derating running

Warning information is detected. The inverter derates actively due to environmental factors such as temperature or altitude

Dispatch Running

The inverter runs according to the scheduling instructions received from the monitoring background

Fault

If a fault occurs, the inverter will automatically stop operation, and disconnect the AC relay. The fault information will be displayed in the app. Once the fault is removed in recovery time, the inverter will automatically resume running.When the country setup is German HV, which is complied with VDE-AR-4120, the inverter will not be automatically connected to the grid after the fault is cleared, and needs to wait for an external signal to trigger reconnection.

table 7-3 Description of PID State

State PID recovery running PID abnormity

Description
The inverters perform PID recovery actively.
It is detected that the ISO impedance is abnormal or the PID cannot work normally after the PID being enabled.

If the inverter is running abnormally, the alarm or fault icon will be displayed in the lower right corner of the inverter icon in power flow chart. The user can tap this icon to enter the alarm or fault screen to view detailed information and corrective measures.

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7.6 Run Information

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

table 7-4 Run Information

Classifica- Parameter tion

PV Information

String n Voltage String n current

Total On-grid Run-

ning Time

Daily On-grid Running Time

Negative Voltage to Ground

Inverter Information
Input Output

Bus Voltage
Internal Air Temperature Array Insulation Resistance Country Information Power Limitation Mode Reactive Power Mode Total DC Power MPPT x Voltage
MPPT x Current Daily Yield Monthly Yield Annual Yield Total Active Power Total Reactive Power Total Apparent Power Total Power Factor Gird Frenquency

Description
The input voltage of the nth string The input current of the nth string
/
/
Inverter DC side negative to ground voltage value Voltage between the positive and negative poles of the DC side of the inverter
/
Insulation resistance value of the input side to the protection ground /
/
/
DC side total input power The input voltage of the xth MPPT The input current of the xth MPPT / / / Current active power value of the inverter
Current reactive power value of the inverter
Current apparent power value of the inverter
Power factor of the AC side of the inverter Frequency of the AC side of the inverter

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Classification

Parameter
A-B Line Voltage B-C Line Voltage C-A Line Voltage Phase A Current Phase B Current Phase C Current

Description Line Voltage Phase Current

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

figure 7-6 Records Fault Alarm Record Tap Fault Alarm Record to enter the screen, as shown in the following figure.

figure 7-7 Fault Alarm Record
Click to select a time segment and view corresponding records. The inverter can record up to 400 latest entries.
Select one of the records in the list and click the record, to view the detailed fault info as shown in following figure.

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figure 7-8 Detailed Fault Alarm Information Yield Record Tap Yield Record to enter the screen showing daily power generation , as shown in the following figure.

figure 7-9 Power Curve

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

table 7-5 Explanation of Power Yields Records

Parameter Power curve

Description Shows the power output from 5 am to 11 pm in a single day. Each point on the curve is the percentage of present power to rated power.

Daily energy histogram

Shows the power output every day in the present month.

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Parameter Monthly energy histogram Annual energy histogram

Description Shows the power output every month in a year. Shows the power output every year.

Tap the time bar on the top of the screen to select a time segment and view the corresponding power curve. Swipe left to check the power yields histogram.
Event Record Tap Event Record to view event record list.

Click to select a time segment and view corresponding records. The inverter can at most record the latest 400 events.

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

figure 7-10 More
7.8.1 System Parameters Tap SettingsSystem Parameters to enter the corresponding screen, as shown in the following figure.

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figure 7-11 System Parameters Boot/Shutdown Tap Boot/Shutdown to send the boot/shutdown instruction to the inverter. For Australia and New Zealand, when the DRM state is DRM0, the “Boot” option will be prohibited. Date/Time The correct system time is very important. Wrong system time will directly affect the data logging and power generation value. The clock is in 24-hour format.
7.8.2 Operation Parameters Running Time Tap SettingsOperation ParametersRunning Time to enter the corresponding screen, on which you can set “Running Time”.
figure 7-12 Running Time PID Parameters Tap SettingsOperation ParametersPID Parameters to enter the corresponding screen, on which you can set “PID Parameters”.

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figure 7-13 PID Setting

table 7-6 PID Parameter Description

Parameter PID Recovery
Clear PID alarm PID Scheme

Description Set enabling/disabling of the PID night recovery function. PID night recovery function operates between 22:00 pm and 5:00 am by default. If ISO impedance abnormality or PID function exception is detected during running of the PID function, the inverter reports a PID false alarm and reminds the user to take corresponding measures. After processing, clear the alarm via this parameter. Apply negative or positive voltage.

After the PID night recovery function is enabled, the fault indicator on the inverter front panel turns green.
AFCI Parameters(Optional) Tap SettingsOperation ParametersAFCI Parameters to enter the corresponding screen, on which you can set “AFCI Parameters”.

figure 7-14 AFCI Setting NS Protection(Passive Valid) Tap SettingsOperation ParametersRegular Parameters to enter the corresponding screen, on which you can set the “NS Protection(Passive Valid)”.

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figure 7-15 NS Protection(Passive Valid)
7.8.3 Power Regulation Parameters Active Power Regulation Tap SettingsPower Regulation ParametersActive Power Regulation to enter the screen, as shown in the following figure.

figure 7-16 Active Power Regulation

table 7-7 Active Power Regulation

Parameter

Definition/Setting Description

Range

Active power soft start after fault

The switch for enabling/disabling the soft start function after a fault occurs.

Enable/Disable

Active power soft start time after fault

Time that the soft start takes to raise the power from 0 to 100% rated power.

1s~1200s

Active power gradient control

Switch for enabling/disabling the active power rate settable function.

Enable/Disable

Active power decline gradient

The decline rate of inverter active power per minute.

3%/min~6000%/min

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Parameter

Definition/Setting Description

Range

Active power rising gradient

The rise rate of inverter active 3%/min~6000%/min power per minute.

Active power setting persistence

Switch for enabling/disabling the function of saving output limited power.

Enable/Disable

Active power limit

The switch for limiting output Enable/Disable power.

Active power limit ratio

The ratio of limiting output power to rated power in percentage.

0%~110%

Shutdown when active power limit to 0%

Switch used to determine whether the inverter is in stop state when the limited power reaches 0.

Enable/Disable

Reactive Power Regulation Tap SettingsPower Regulation ParametersReactive Power Regulation to enter the screen, as shown in the following figure.

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figure 7-17 Reactive Power Regulation

table 7-8 Reactive Power Regulation

Parameter

Definition/Setting Description

Range

Reactive power gener- Switch for enabling/disabling Enable/Disable

ation at night

Q at night function.

Reactive power ratio at Reactive power ratio set for

night

the Q at night function.

-100%~0%/ 0%~100%

Reactive power setting persistence

Switch for enabling/disabling the power-off function during reactive power.

Enable/Disable

Reactive power regula- — tion mode

Reactive power regulation

Switch for enabling/disabling reactive response function.

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

Reactive power regula- Ends time of reactive

tion time

response.

0.1s~600.0s

Q(P)Curve

Select corresponding curve Curve A/Curve B/Curve C* according to local regulations

QP_P1

Output power at P1 on the Q (P) mode curve (in percentage)

10.0%~100.0%

QP_P2

Output power at P2 on the Q (P) mode curve (in percentage)

20.0%~100.0%

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Parameter QP_P3 QP_K1
QP_K2
QP_K3
QP_EnterVoltage QP_ExitVoltage QP_EXitPower QP_EnableMode Q(U)Curve QU_V1 QU_Q1

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Definition/Setting Description

Range

Output power at P3 on the Q (P) mode curve (in percentage)

20.0%~100.0%

Power factor at P1 on the Q (P) mode curve
Power factor at P2 on the Q (P) mode curve
Power factor at P3 on the Q (P) mode curve
Voltage percentage for Q(P) function activation Voltage percentage for Q(P) function deactivation Power percentage for Q(P) function deactivation Unconditional activation/deactivation of Q(P) function

Curve A/Curve C:0.800~1.000 Curve B: [-0.600~0.600] Active Overload Rate/ 1000 Curve A/Curve C: 0.800~1.000 Curve B: [-0.600~0.600] Active Overload Rate/ 1000 Curve A/Curve C: 0.800~1.000 Curve B: [-0.600~0.600] *Active Overload Rate/ 1000 100.0%~110.0%
90.0%~100.0%
1.0%-20.0%
Yes/No

Select the corresponding curve according to local regulations

Curve A/Curve B/Curve C*

Pre-set grid voltage U1 that is reactive according to the grid voltage

80.0%~100.0%

Pre-set proportion of reactive power according to the grid voltage U1

[-60.0%-0]* Overload Rate/1000

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Parameter

Definition/Setting Description

Range

QU_V2

Pre-set grid voltage U2 that is reactive according to the grid voltage.

80.0%~100.0%

QU_Q2

Pre-set proportion of reactive power according to the grid voltage U2.

[-60.0%-60.0%]* Overload Rate/1000

QU_V3

Pre-set grid voltage U3 that is reactive according to the grid voltage.

100.0%~120.0%

QU_Q3

Pre-set proportion of reactive power according to the grid voltage U3.

[-60.0%-60.0%]* Overload Rate/1000

QU_V4

Pre-set grid voltage U4 that is reactive according to the grid voltage.

100.0%~120.0%

QU_Q4

Pre-set proportion of reactive power according to the grid voltage U4.

[0-60.0%]* Overload Rate/ 1000

QU_EnterPower QU_EXitPower QU_EnableMode QU_Limited PF Value

Active power for Q(U) function activation
Active power for Q(U) function deactivation
Unconditional activation/deactivation of Q(U) function
—

20.0%~100.0% 1.0%~20.0% Yes/No/Yes,Limited by PF 0-0.95

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

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figure 7-18 Q(U) Curve
figure 7-19 Q(P) Curve
7.8.4 Communication Parameters Tap SettingsCommunication Parameters to enter the corresponding screen, as shown in the following figure. The device address ranges from 1 to 246.
figure 7-20 Communication Parameters
7.8.5 Firmware Update To avoid download failure due to poor on-site network signal, it is recommended to download the firmware package to the mobile device in advance. Perform firmware update only during high irradiance conditions in order to prevent equipment failure.
step 1 Enable the “Mobile data” of the mobile device. step 2 Open the App, enter the account and password on the login screen. Tap Login to enter
the home screen. step 3 Tap MoreFirmware Download to enter corresponding screen on which you can view
the device list.
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step 4 Select the device model before downloading the firmware. Tap the device name in the

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

behind

step 5 Return to the Firmware Download screen, tap in the upper right corner of the screen to view the downloaded firmware upgrade package.
step 6 Login the App via local access mode. Refer to “7.4 Login”. step 7 Tap More on the App home screen and then tap Firmware Update. step 8 Tap the upgrade package file, a prompt box will pop up asking you to upgrade the firm-
ware with the file, tap CONFIRM to perform the firmware upgrade.
step 9 Wait for the file to be uploaded. When the upgrade is finished, the interface will inform you of the upgrade completion. Tap Complete to end the upgrade.

– – End 7.8.6 Password Changing
Tap Modify Password to enter the modify password screen, as shown in the following figure.
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figure 7-21 Change Password The password shall consisit of 8­20 digits, including letters and numbers.

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8 System Decommissioning
8.1 Disconnecting the Inverter
For maintenance or other service work, the inverter must be switched off. Proceed as follows to disconnect the inverter from the AC and DC power sources. Lethal voltages or damage to the inverter will follow if otherwise. step 1 Disconnect the external AC circuit breaker and secure it against reconnection. step 2 Rotate the DC switch to the “OFF” position for disconnecting all of the PV string inputs. step 3 Wait about 5 minutes until the capacitors inside the inverter completely discharge. step 4 Ensure that the DC cable is current-free via a current clamp. step 5 Insert a MC4 wrench into the notch and press the wrench with an appropriate force to remove the DC connector.
step 6 Ensure that the AC wiring terminals are voltage-free via a multimeter, and remove the AC wires and communication wires.
step 7 Install the MC4 waterproof plugs. For further disconnection and reconnection instructions, please visit the webpage of respective component manufacturer.
– – End
8.2 Dismantling the Inverter
Risk of burn injuries and electric shock! Do not touch any inner live parts until for at least 5 minutes after disconnecting the inverter from the utility grid and the PV input.
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step 1 Refer to “5 Electrical Connection” for the inverter disconnection of all cables in reverse steps.
step 2 Dismantle the inverter referring to “4 Mechanical Mounting” in reverse steps. step 3 If necessary, remove the wall-mounting bracket from the wall.
step 4 If the inverter will be reinstalled in the future, please refer to “3.2 Inverter Storage” for a proper conservation.
– – End

8.3 Disposal of the Inverter

Users take the responsibility for the disposal of the inverter.

Some parts and devices of the inverter, such as the capacitors, may cause environmental pollution. Do not dispose of the product together with household waste but in accordance with the disposal regulations for electronic waste applicable at the installation site.

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9 Troubleshooting and Maintenance
9.1 Troubleshooting
Once the inverter fails, the fault information can be displayed on the App interface. If the inverter is equipped with an LCD screen, the fault information can be viewed on it. The fault codes and troubleshooting methods of all PV inverters are detailed in the table below. The device you purchase may only contain some of the fault information, and when the inverter fails, you can check the corresponding information through the fault codes from the mobile app.
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Fault code Fault name
2, 3, 14, 15 Grid Overvoltage

4, 5

Grid Undervoltage

9 Troubleshooting and Maintenance
Corrective measures Generally, the inverter will be reconnected to the grid after the grid returns to normal. If the fault occurs repeatedly: 1. Measure the actual grid voltage, and contact the local electric power company for solutions if the grid voltage is higher than the set value. 2. Check whether the protection parameters are appropriately set via the App or the LCD. Modify the overvoltage protection values with the consent of the local electric power operator. 3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists. Generally, the inverter will be reconnected to the grid after the grid returns to normal. If the fault occurs repeatedly:

1. Measure the actual grid voltage, and contact the local electric power company for solutions if the grid voltage is lower than the set value. 2. Check whether the protection parameters are appropriately set via the App or the LCD. 3. Check whether the AC cable is firmly in place. 4. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.

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Fault code 8

Fault name Grid Overfrequency

9

Grid Underfrequency

10

Grid Power Outage

Excess Leakage

12

Current

Corrective measures Generally, the inverter will be reconnected to the grid after the grid returns to normal. If the fault occurs repeatedly:
1. Measure the actual grid frequency, and contact the local electric power company for solutions if the grid frequency is beyond the set range.
2. Check whether the protection parameters are appropriately set via the App or the LCD.
3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists. Generally, the inverter will be reconnected to the grid after the grid returns to normal. If the fault occurs repeatedly:
1. Check whether the grid supplies power reliably.
2. Check whether the AC cable is firmly in place.
3. Check whether the AC cable is connected to the correct terminal (whether the live wire and the N wire are correctly in place).
4. Check whether the AC circuit breaker is connected.
5. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists. 1. The fault can be caused by poor sunlight or damp environment, and generally the inverter will be reconnected to the grid after the environment is improved.
2. If the environment is normal, check whether the AC and DC cables are well insulated.
3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.

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Fault code 13
17
28, 29, 208, 448-479

Fault name

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

1. Measure the actual grid frequency, and

Grid Abnormal

contact the local electric power company for solutions if the grid parameter exceeds

the set range.

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

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

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

Grid Voltage Imbalance 2. If the voltage difference between phases is within the permissible range of the local

power company, modify the grid voltage imbalance parameter through the App or the LCD.

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

1. Check whether the corresponding string

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

PV Reserve Connection Fault

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

*The code 28 to code 29 are corresponding

to PV1 to PV2 respectively.

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

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Fault code 532-547, 564-579
548-563, 580-595

Fault name

Corrective measures 1. Check whether the corresponding PV input side is of reverse polarity. If so, adjust the polarity.

PV Reverse Connection Alarm

Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
*The code 532 to code 547 are corresponding to string 1 to string 16 respectively.

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

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

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

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

PV Abnormal Alarm

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

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

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

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

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Fault code 37 43 39

Fault name
Excessively High Ambient Temperature
Excessively Low Ambient Temperature
Low System Insulation Resistance

Corrective measures Generally, the inverter will resume operation when the internal or module temperature returns to normal. If the fault persists:
1. Check whether the ambient temperature of the inverter is too high;
2. Check whether the inverter is in a wellventilated place;
3. Check whether the inverter is exposed to direct sunlight. Shield it if so;
4. Check whether the fan is running properly. Replace the fan if not;
5. Contact Sungrow Power Customer Service if the fault is due to other causes and the fault persists. Stop and disconnect the inverter. Restart the inverter when the ambient temperature rises within the operation temperature range. Wait for the inverter to return to normal. If the fault occurs repeatedly:
1. Check whether the ISO resistance protection value is excessively high via the app or the LCD, and ensure that it complies with the local regulations.
2. Check the resistance to ground of the string and DC cable. Take corrective measures in case of short circuit or damaged insulation layer.
3. If the cable is normal and the fault occurs on rainy days, check it again when the weather turns fine.
4. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.

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Fault code 106
88 84 514

Fault name Grounding Cable Fault
Electric Arc Fault
Reverse Connection Alarm of the Meter/CT
Meter Communication Abnormal Alarm

Corrective measures 1. Check whether the AC cable is correctly connected.
2. Check whether the insulation between the ground cable and the live wire is normal.
3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists. 1. Disconnect the DC power supply, and check whether any DC cable is damaged, the connection terminal or fuse is loose or there is a weak contact. If so, replace the damaged cable, fasten the terminal or fuse, and replace the burnt component.
2. After performing step 1, reconnect the DC power supply, and clear the electric arc fault via the App or the LCD, after that the inverter will return to normal.
3. Contact Sungrow Customer Service if the fault persists. 1. Check if the meter is wrongly connected.
2. Check if the input and output wiring of the meter is reversed.
3. If the existing system is enabled, please check if the rated power setting of the existing inverter is correct. 1. Check whether the communication cable and the terminals are abnormal. If so, correct them to ensure reliable connection.
2. Reconnect the communication cable of the meter.
3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.

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Fault code Fault name

323

Grid Confrontation

Inverter Parallel Com75
munication Alarm

7, 11, 16, 19­25, 30­34, 36, 38, 40­42, 44­50, 52­58, 60­68, 85, 87, 92, 93, 100­105, 107­114, 116­124, 200­211, 248­255, 300­322, 324­326, 401­412, 600­603, 605, 608, 612, 616, 620, 622­ 624, 800, 802, 804, 807, 1096­ 1122

System Fault

Corrective measures 1. Check whether the output port is connected to actual grid. Disconnect it from the grid if so. 2. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists. 1. Check whether the communication cable and the terminals are abnormal. If so, correct them to ensure reliable connection. 2. Reconnect the communication cable of the meter. 3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
Wait for the inverter to return to normal. Disconnect the AC and DC switches, and reconnect the AC and DC switches 15 minutes later to restart the inverter. If the fault still exists, contact Sungrow Customer Service.

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Fault code 59, 70­72, 74, 76, 82, 83, 89, 77­ 81, 216­ 218, 220­ 231, 432­ 434, 500­ 513, 515­ 518, 900, 901, 910, 911

Fault name System Alarm

264-283

MPPT Reverse Connection

332-363

Boost Capacitor Overvoltage Alarm

Corrective measures
1. The inverter can continue running. 2. Check whether the related wiring and terminal are abnormal, check whether there are any foreign materials or other environmental abnormalities, and take corresponding corrective measures when necessary. If the fault persists, please contact Sungrow Power Customer Service.
1. Check whether the corresponding string is of reverse polarity. If so, disconnect the DC switch and adjust the polarity when the string current drops below 0.5 A. 2. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists. *The code 264 to code 279 are corresponding to string 1 to string 20 respectively. 1. The inverter can continue running. 2. Check whether the related wiring and terminals are abnormal, check whether there are any foreign materials or other environmental abnormalities, and take corresponding corrective measures when necessary. If the fault persists, please contact Sungrow Power Customer Service.

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Fault code 364-395
1548-1579

Fault name Boost Capacitor Overvoltage Fault
String Current Reflux

Corrective measures Disconnect the AC and DC switches, and reconnect the AC and DC switches 15 minutes later to restart the inverter. If the fault still exists, contact Sungrow Customer Service. 1. Check whether the number of PV modules of the corresponding string is less than other strings. If so, disconnect the DC switch and adjust the PV module configuration when the string current drops below 0.5 A.
2. Check whether the PV module is shaded;
3. Disconnect the DC switch to check whether the open circuit voltage is normal when the string current drops below 0.5 A. If so, check the wiring and configuration of the PV module,
4. Check whether the orientation of the PV module is abnormal.

9.2 Maintenance
9.2.1 Maintenance Notices

Risk of inverter damage or personal injury due to incorrect service!
· Always keep in mind that the inverter is powered by dual sources: PV strings and utility grid.
Before any service work, observe the following procedure.
· Disconnect the AC circuit breaker and then set the DC load-break switch of the inverter to OFF;
· Turn the DC switch from ON to OFF and continue to turn it 20 degrees counterclockwise, the DC switch can be locked here.For countries “AU” and “NZ”
· Wait at least 5 minutes for inner capacitors to discharge completely;
· Verify that there is no voltage or current before pulling any connector.

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Keep non-related persons away! A temporary warning sign or barrier must be posted to keep non-related persons away while performing electrical connection and service work.

Restart the inverter only after removing the fault that impairs safety performance. As the inverter contains no component parts that can be maintained, never arbitrarily replace any internal components. For any maintenance need, please contact SUNGROW. Otherwise, SUNGROW shall not be held liable for any damage caused.

Servicing of the device in accordance with the manual should never be undertaken in the absence of proper tools, test equipments or the latest revision of the manual which has been clearly and thoroughly understood.

9.2.2 Routine Maintenance

Item System clean

Method Check the temperature and dust of the inverter. Clean the inverter enclosure if necessary.
Check if the air inlet and outlet are normal. Clean the air inlet and outlet, if necessary.

Period
Six months to a year (depend on the dust contents in air.)

Check whether there is fan warning using App.

Fans

Check whether there is any abnormal noise when the fan is turning.

Once a year

Clean or replace the fans if necessary (see the following section).

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Item Cable entry
Electrical Connection

Method Check whether the cable entry is insufficiently sealed or the gap is excessively large, and reseal the entry when necessary.
Check whether all cable are firmly connected in place.
Check whether a cable is damaged, especially the part contacting the metal enclosure.

Period Once a year
Six months to a year

9.2.3 Cleaning Air Inlet and Outlet
A significant amount of heat is generated when the inverter is working. In order to maintain good ventilation, please check to make sure the air inlet and outlet are not blocked. Clean the air inlet and outlet with soft brush or vacuum cleaner if necessary.
9.2.4 Fan Maintenance

· Stop the inverter and disconnect it from all power supplies before maintenance.
· Lethal voltage still exists in the inverter. Please wait for at least 5 minutes and then perform maintenance work.
· Only qualified electricians can maintain the fans.
Fans inside the inverter are used to cool the inverter during operation. If the fans do not operate normally, the inverter may not be cooled down and inverter efficiency may decrease. Therefore, it is necessary to clean dirty fans and replace the broken fans in a timely manner. The operation procedure is as follows: step 1 Stop the inverter (see 8.1 Disconnecting the Inverter). step 2 Loosen the screw on the sealing plate of the fan module.

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step 3 Press the tab of the latch hook, unplug the cable connection joint outwards, and loosen the screw on the fan holder.
step 4 Pull out the fan module, clean the fans with soft brush or vacuum cleaner, and replace them when necessary.

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step 5 Reinstall the fan back to the inverter in reverse order and restart the inverter. – – End
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10 Appendix
10.1 Technical Data
Parameters Input (DC) Max. PV input voltage Min.PV input voltage/Start-up input voltage Nominal input voltage MPP voltage range No. of independent MPP inputs No. of PV strings per MPPT Max. PV input current Max.DC Short-circuit current Output (AC) AC output power Max. AC output current Nominal AC voltage AC voltage range Nominal grid frequency / Grid frequency range Harmonic (THD) Power factor at nominal power / Adjustable power factor Feed-in phases / AC connection Efficiency Max. efficiency / European efficiency Protection and Function DC reverse polarity protection AC short-circuit protection Leakage current protection Grid monitoring Ground fault monitoring
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SG110CX
1100 V 200 V / 250 V
585 V 200 ­ 1000 V
9 2 26 A 9 40 A * 9
110 kVA @ 45 / 100 kVA @ 50 158.8 A
3 / N / PE230 / 400 V 320 ­ 460 V
50 Hz / 45 ~ 55Hz60Hz / 55 ~ 65 Hz < 3 % (at nominal power)

0.99 / 0.8 leading ­ 0.8 lagging
3 / 3 ­ PE
98.7% / 98.5%
Yes Yes Yes Yes Yes

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10 Appendix

Parameters DC switch AC switch PV string monitoring Q at night PID recovery function Arc fault circuit interrupter (AFCI) Surge protection General Data Dimensions (WHD) Weight Topology Ingress protection rating Night power consumption Operating ambient temperature range Allowable relative humidity range Cooling method Max. operating altitude Display Communication DC connection type AC connection type
Grid Support

SG110CX Yes No Yes Yes Yes
Optional
DC Type II (optional: Type I + II) / A C Type II
1051 660 362.5 mm 89 kg
Transformerless IP66 <2W
-30 to 60 (> 50 derating)
0 – 100%
Smart forced air cooling 4000 m (> 3000 m derating)
LED, Bluetooth + APP RS485/ Optional: WLAN, Ethernet
MC4 (Max. 10 mm2 optional) OT or DT terminal (Max.240 mm2) Q at night function, LVRT, HVRT, active & reactive power control and power ramp rate control

• If the maximum DC voltage in the system can exceed 1000 V, the MC4 connectors included in the scope of delivery must not be used. In this case MC4 Evo2 connectors must be used.

10.2 Wring Distance of DI Dry Contact

The maximum wiring distance of DC dry contact must meet the requirements in the Table below. The wiring distance L is the total length of all DI signal cables.

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LK refers to the cable length in one direction between the DI dry contact terminal of the kth inverter and the corresponding terminal of the (k-1)th inverter.

table 10-1 Correspondence between number of inverters and maximum wiring distance

Number of inverter

Maximum wiring distance(unit:m)

16AWG / 1.31mm2

17AWG / 1.026mm2

1

13030

10552

2

6515

5276

3

4343

3517

4

3258

2638

5

2606

2110

6

2172

1759

7

1861

1507

8

1629

1319

9

1448

1172

10

1303

1055

11

1185

959

12

1086

879

13

1002

812

14

931

754

15

869

703

16

814

660

17

766

621

18

724

586

19

686

555

20

652

528

21

620

502

22

592

480

23

567

459

24

543

440

25

521

422

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In case the specification of the cable used is not included in the Table above, when there is only one inverter, ensure that the line impedance of the input node is less than 300; and when there are multiple inverters connected in the daisy chain, ensure that the impedance is less than 300/number of inverter.
10.3 Quality Assurance
When product faults occur during the warranty period, SUNGROW will provide free service 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. Otherwise, SUNGROW has the right to refuse to honor the quality guarantee. Conditions · After replacement, unqualified products shall be processed by SUNGROW. · The customer shall give SUNGROW a reasonable period to repair the faulty device. Exclusion of Liability In the following circumstances, SUNGROW has the right to refuse to honor the quality guarantee: · The free warranty period for the whole machine/components has expired. · The device is damaged during transport. · The device is incorrectly installed, refitted, or used. · The device operates in harsh conditions beyond those described in this manual. · The fault or damage is caused by installation, repairs, modification, or disassembly
performed by a service provider or personnel not from SUNGROW. · The fault or damage is caused by the use of non-standard or non-SUNGROW com-
ponents or software. · The installation and use range are beyond stipulations of relevant international
standards. · The damage is caused by unexpected natural factors. 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.
10.4 Contact Information
Should you have any question about this product, please contact us.
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10 Appendix

User Manual

We need the following information to provide you the best assistance:

· Model of the device

· Serial number of the device · Fault code/name

· Brief description of the problem

China (HQ) Sungrow Power Supply Co., Ltd Hefei +86 551 65327834 service@sungrowpower.com Brazil Sungrow Do Brasil Sao Paulo +55 0800 677 6000 latam.service@sungrowamericas.com Germany, Austria, Switzerland Sungrow Deutschland GmbH Munich +49 0800 4327 9289 service@sungrow-emea.com India Sungrow (India) Private Limited Gurgaon +91 080 41201350 service@in.sungrowpower.com
Japan Sungrow Japan K.K. Tokyo + 81 3 6262 9917 service@jp.sungrowpower.com Malaysia Sungrow SEA Selangor Darul Ehsan +60 19 897 3360 service@my.sungrowpower.com

Australia Sungrow Australia Group Pty. Ltd. Sydney +61 2 9922 1522 service@sungrowpower.com.au France Sungrow France Lyon +33420102107 service @sungrow-emea.com Greece Service Partner ­ Survey Digital +30 2391052757 service@sungrow-emea.com
Italy Sungrow Italy Verona +39 0800 974739 (Residential) +39 045 4752117 (Others) service@sungrow-emea.com Korea Sungrow Power Korea Limited Seoul +82 70 7719 1889 service@kr.sungrowpower.com Philippines Sungrow Power Supply Co., Ltd Mandaluyong City +63 9173022769 service@ph.sungrowpower.com

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User Manual
Thailand Sungrow Thailand Co., Ltd. Bangkok +66 891246053 service@th.sungrowpower.com Romania Service Partner – Elerex service@sungrow- emea.com
UK Sungrow Power UK Ltd. Milton Keynes +44 (0) 01908 414127 service@sungrow- emea.com Vietnam Sungrow Vietnam Hanoi +84 918 402 140 service@vn.sungrowpower.com Poland +48 221530484 service@sungrow-emea.com

10 Appendix
Spain Sungrow Ibérica S.A.U. Mutilva +34 948 05 22 04 service@sungrow-emea.com Turkey Sungrow Deutschland GmbH Turkey Istanbul +90 216 663 61 80 service @sungrow-emea.com U.S.A, Mexico Sungrow USA Corporation Phoenix +1 833 747 6937 techsupport@sungrow-na.com Belgium, Netherlands and Luxembourg (Benelus) +31 08000227012 (only for Netherlands) service@sungrow-emea.com
–

99

References

• emea.com
• Commercial Distributor & Supply Company | North American
• Leading Solar Inverter and Energy Storage Solutions Provider - Sungrow US
• Leading Solar Inverter and Energy Storage Solutions Provider - Sungrow US
• Home - Identity Digital
• Leading Solar Inverter and Energy Storage Solutions Provider - Sungrow US

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