SUNGROW SG6.0RT-P2 3 Phase PV Grid Connected Inverter User Manual

SUNGROW SG6.0RT-P2 3 Phase PV Grid Connected Inverter

Product Specifications

• Model: SG3.0RT / SG4.0RT / SG5.0RT / SG6.0RT / SG7.0RT / SG8.0RT / SG10RT / SG12RT / SG15RT / SG17RT / SG20RT /SG5.0RT-P2 / SG6.0RT-P2 / SG7.0RT-P2 / SG8.0RT-P2 / SG10RT-P2 / SG12RT-P2 / SG15RT-P2 / SG17RT-P2 / SG20RT-P2
• 3-Phase PV Grid-Connected Inverter
• User Manual: SG3.0-20RT_SG5.0-20RT-P2-UEN-Ver12-202310

Safety Instructions

Ensure to follow all safety instructions provided in the manual to prevent any potential hazards or injuries.

Product Description

The inverter is designed for grid-connected PV systems to convert solar energy into usable electrical power.

Unpacking and Storage

Unpacking and Inspection

When unpacking, carefully inspect the inverter for any damages that may have occurred during transit.

Inverter Storage

Store the inverter in a dry and well-ventilated area away from direct sunlight or moisture.

Mechanical Mounting

Safety During Mounting

Follow safety guidelines during the mounting process to prevent accidents.

Location Requirements

Install the inverter in a location that meets the specified requirements mentioned in the manual.

Electrical Connection

Safety Instructions

Adhere to all safety precautions while making electrical connections to avoid electric shock or damage.

Terminal Description

Refer to the terminal description section for understanding the connection points on the inverter.

Electrical Connection Overview

Get an overview of the electrical connections required for proper functioning of the inverter.

External Protective Grounding Connection

Ensure proper grounding connection is established to prevent electrical faults.

FAQs

• Can I install the inverter myself?
  • No, the inverter must only be installed by professional technicians to ensure proper installation and operation.
• What should I do if I notice any damage during unpacking?
  • If any damage is noticed during unpacking, contact the supplier or manufacturer for further instructions.

User Manual
3-Phase PV Grid-Connected Inverter
SG3.0RT / SG4.0RT / SG5.0RT / SG6.0RT / SG7.0RT / SG8.0RT / SG10RT / SG12RT / SG15RT / SG17RT / SG20RT /SG5.0RT-P2 / SG6.0RT-P2 / SG7.0RT-P2 / SG8.0RT-P2 / SG10RT-P2 / SG12RT-P2 / SG15RT-P2 / SG17RT-P2 / SG20RT-P2
SG3.0RT / SG4.0RT / SG5.0RT / SG6.0RT / SG7.0RT / SG8.0RT / SG10RT / SG12RT / SG15RT / SG17RT / SG20RT /SG5.0RT-P2 / SG6.0RT-P2 / SG7.0RT-P2 / SG8.0RT-P2 / SG10RTP2 / SG12RT-P2 / SG15RT-P2 / SG17RT-P2 / SG20RT-P23-Phase PV Grid- Connected InverterUser SG3.0-20RT_SG5.0-20RT-P2-UEN-Ver12-202310

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

The manual mainly contains the product information, as well as guidelines for installation, operation, and maintenance. The manual does not include complete information about the photovoltaic (PV) system. Readers can get additional information at www.sungrowpower. com or on the webpage of the respective component manufacturer. Validity This manual is valid for the following model of low-power grid-connected PV string inverters: · SG3.0RT · SG4.0RT · SG5.0RT · SG6.0RT · SG7.0RT · SG8.0RT · SG10RT · SG12RT · SG15RT · SG17RT · SG20RT · SG5.0RT-P2 · SG6.0RT-P2 · SG7.0RT-P2 · SG8.0RT-P2 · SG10RT-P2 · SG12RT-P2 · SG15RT-P2 · SG17RT-P2 · SG20RT-P2
It will be referred to as “inverter” hereinafter unless otherwise specified. Target Group This manual is intended for professional technicians who are responsible for installation, operation, and maintenance of inverters, and users who need to check inverter parameters. The inverter must only be installed by professional technicians. The professional technician is required to meet the following requirements:
II

· Know electronic, electrical wiring and mechanical expertise, and be familiar with electrical and mechanical schematics.
· Have received professional training related to the installation and commissioning of electrical equipment.
· Be able to quickly respond to hazards or emergencies that occur during installation and commissioning.
· Be familiar with local standards and relevant safety regulations of electrical systems. · Read this manual thoroughly and understand the safety instructions related to
operations. How to Use This Manual Please read this manual carefully before using the product and keep it properly at a place for easy access. All contents, pictures, marks, and symbols in this manual are owned by SUNGROW. No part of this document may be reprinted by the non-internal staff of SUNGROW without written authorization. Contents of this manual may be periodically updated or revised, and the actual product purchased shall prevail. Users can obtain the latest manual from support.sungrowpower.com or sales channels. Symbols This manual contains important safety instructions, which are highlighted with the following symbols, to ensure personal and property safety during usage, or to help optimize the product performance in an efficient way. Please carefully understand the meaning of these warning symbols to better use the manual.
Indicates high-risk potential hazards that, if not avoided, may lead to death or serious injury.
Indicates moderate-risk potential hazards that, if not avoided, may lead to death or serious injury.
Indicates low-risk potential hazards that, if not avoided, may lead to minor or moderate injury.
Indicates potential risks that, if not avoided, may lead to device malfunctions or financial losses.
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“NOTE” indicates additional information, emphasized contents or tips that may be helpful, e.g., to help you solve problems or save time.

Safety Instructions

When installing, commissioning, operating, and maintaining the product, strictly observe the labels on the product and the safety requirements in the manual. Incorrect operation or work may cause: · Injury or death to the operator or a third party. · Damage to the product and other properties.
· Do not operate the product and cables (including but not limited to moving the product, installing the product, operating the product and cables, powering up the product, maintaining the product, and working at heights) in harsh weather conditions such as flooding, lightning, rain, snow, and level 6 or stronger wind.
· In case of fire, evacuate from the building or product area and call the fire alarm. Re-entry into the burning area is strictly prohibited under any circumstances.
· Tighten the screws with the specified torque using tools when fastening the product and terminals. Otherwise, the product may be damaged. And the damage caused is not covered by the warranty.
· Learn how to use tools correctly before using them to avoid hurting people or damaging the device.
· Maintain the device with sufficient knowledge of this manual and use proper tools.
· The safety instructions in this manual are only supplements and 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 general safety operation requirements, general safety standards, or any safety instruction in this manual.
· When installing, operating, and maintaining the product, comply with local laws and regulations. The safety precautions in this manual are only supplements to local laws and regulations.
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1 Safety Instructions
1.1 Unpacking and Inspection

User Manual

· Check all safety signs, warning labels and nameplates on devices.
· The safety signs, warning labels and nameplates must be clearly visible and cannot be removed or covered before the device is decommissioned.

After receiving the product, check whether the appearance and structural parts of the device are damaged, and check whether the packing list is consistent with the actual ordered product. If there are problems with the above inspection items, do not install the device and contact your distributor first. If the problem persists, contact SUNGROW in time.
1.2 Installation Safety
· Make sure there is no electrical connection before installation. · Before drilling, avoid the water and electricity wiring in the wall.
Improper installation may cause personal injury! · If the product supports hoisting transport and is hoisted by hoisting tools, no
one is allowed to stay under the product. · When moving the product, be aware of the product weight and keep the balance
to prevent it from tilting or falling.

Before operating the product, must check and ensure that tools to be used have been maintained regularly.

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User Manual
1.3 Electrical Connection Safety

1 Safety Instructions

· Before electrical connections, please make sure that the inverter is not damaged, otherwise it may cause danger!
· Before electrical connections, please make sure that the inverter switch and all switches connected to the inverter are set to “OFF”, otherwise electric shock may occur!

The PV string will generate lethal high voltage when exposed to sunlight.
· Operators must wear proper personal protective equipment during electrical connections.
· Must ensure that cables are voltage-free with a measuring instrument before touching DC cables.
· Respect all safety instructions listed in relevant documents about PV strings.
· The inverter must not be connected to a PV string that requires positive or negative grounding.

Danger to life due to a high voltage inside the inverter! · Be sure to use special insulation tools during cable connections. · Note and observe the warning labels on the product, and perform operations
strictly following the safety instructions. · Respect all safety instructions listed in this manual and other pertinent
documents.
Damage to the product caused by incorrect wiring is not covered by the warranty. · Electrical connection must be performed by professionals. · All cables used in the PV generation system must be firmly attached, properly
insulated, and adequately dimensioned.

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1 Safety Instructions

User Manual

· Check the positive and negative polarity of the PV strings, and connect the PV connectors to corresponding terminals only after ensuring polarity correctness.
· During the installation and operation of the inverter, please ensure that the positive or negative poles of PV strings do not short-circuit to the ground. Otherwise, an AC or DC short-circuit may occur, resulting in equipment damage. The damage caused by this is not covered by the warranty.

Comply with the safety instructions related to PV strings and the regulations related to the local grid.
1.4 Operation Safety
When routing cables, ensure a distance of at least 30 mm between the cables and heat-generating components or areas to protect the insulation layer of cables from aging and damage. When the product is working: · Do not touch the product enclosure. · It is strictly forbidden to plug and unplug any connector on the inverter. · Do not touch any wiring terminal of the inverter. Otherwise, electric shock may
occur. · Do not disassemble any parts of the inverter. Otherwise, electric shock may
occur. · It is strictly forbidden to touch any hot parts of the inverter (such as the heat
sink). Otherwise, it may cause burns. · Do not connect or remove any battery. Otherwise, electric shock may occur. · Do not connect or remove any PV string or any PV module in a string. Other-
wise, electric shock may occur. · If the inverter is equipped with a DC switch, do not operate it. Otherwise, it may
cause device damage or personal injury.

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User Manual
1.5 Maintenance Safety

1 Safety Instructions

Risk of inverter damage or personal injury due to incorrect service!
· Before maintenance, disconnect the AC circuit breaker on the grid side and then the DC switch. If a fault that may cause personal injury or device damage is found before maintenance, disconnect the AC circuit breaker and wait until the night before operating the DC switch. Otherwise, a fire inside the product or an explosion may occur, causing personal injuries.
· After the inverter is powered off for 10 minutes, measure the voltage and current with professional instrument. Only when there is no voltage nor current can operators who wear protective equipment operate and maintain the inverter.
· Even if the inverter is shut down, it may still be hot and cause burns. Wear protective gloves before operating the inverter after it cools down.

Touching the power grid or the contact points and terminals on the inverter connected to the power grid may lead to electric shock!
· The power grid side may generate voltage. Always use a standard voltmeter to ensure that there is no voltage before touching.

To prevent misuse or accidents caused by unrelated personnel, post prominent warning signs or demarcate safety warning areas around the product.

To avoid the risk of electric shock, do not perform any other maintenance operations beyond those described in this manual. If necessary, contact your distributor first. If the problem persists, contact SUNGROW. Otherwise, the losses caused is not covered by the warranty.

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1 Safety Instructions

User Manual

· If the paint on the inverter enclosure falls or rusts, repair it in time. Otherwise, the inverter performance may be affected.
· Do not use cleaning agents to clean the inverter. Otherwise, the inverter may be damaged, and the loss caused is not covered by the warranty.
· As the inverter contains no parts that can be maintained, never open the enclosure of the inverter or replace any internal components without authorization. Otherwise, the loss caused is not covered by the warranty.
1.6 Disposal Safety
Please scrap the product in accordance with relevant local regulations and standards to avoid property losses or casualties.

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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 feeds the AC current to the utility grid.
· The inverter must only be operated with PV strings with class II protection in accordance with IEC 61730, application class A. It is not allowed for the positive pole or the negative pole of the PV strings to be grounded. This can cause damage to the inverter.
· Do not connect any local load between the inverter and the AC circuit breaker.
The inverter applies only to the scenarios described in this manual. The intended usage of the inverter is illustrated in the following figure (what are in the dashed box are optional).
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2 Product Description

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figure 2-1 Inverter Application in PV Power System

Item A
B
C D E

Description PV strings
Inverter Metering device Utility grid Optimizer

Note Compatible with monocrystalline silicon, polycrystalline silicon, and thin-film modules without grounding SG3.0RT, SG4.0RT, SG5.0RT, SG6.0RT, SG7.0RT, SG8.0RT, SG10RT, SG12RT, SG15RT, SG17RT, SG20RT, SG5.0RT-P2, SG6.0RT-P2, SG7.0RT-P2, SG8.0RT-P2, SG10RT-P2, SG12RT-P2, SG15RT-P2, SG17RT-P2, SG20RT-P2 Meter cupboard with power distribution system
TT, TN-C, TN-S, TN-C-S Inverters that are compatible with the optimizer include: SG5.0RT-P2, SG6.0RT-P2, SG7.0RT-P2, SG8.0RT-P2, SG10RT-P2, SG12RT-P2, SG15RT-P2, SG17RT-P2, SG20RT-P2

Please refer to the optimizer user manual for details.

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User Manual

2 Product Description

Please contact your local sales staff to confirm that the optimizer is available for sale in your territory. SP600S optimizer is not compatible with third-party products.

It is recommended to use the optimizer produced by SUNGROW. Optimizers from third-party manufacturers may fail or even cause unknown losses.
The following figure shows the common grid configurations.

2.2 Product Introduction
Model Description The model description is as follows (take SG10RT as an example):
Appearance The following figure shows the appearance 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

No. Name

1

Nameplate

2

LED indicator

3

Hanger

Description To clearly identify the product, including device model, S/N, important specifications, marks of certification institutions, etc. To indicate the current working state of the inverter. Complement to the included wall-mounting bracket for hanging the inverter.

4

Label

DC switch

5

(Optional)

Information about COM2 pin definition, supported DRM modes, etc.
To safely disconnect the DC circuit whenever necessary.

Electrical connec- DC terminals (SG20RT for example), AC terminal, additional

6 tion area

grounding terminal and communication terminals.

Optimization of the inverter’s heat dissipation. Only the

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Fans

SG15RT, SG17RT, SG20RT, SG15RT-P2, SG17RT-P2 and

SG20RT-P2 are equipped with fans.

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 Product

Symbol

Explanation Regulatory compliance mark.

TÜV mark of conformity. CE mark of conformity. EU/EEA Importer. UKCA mark of conformity.

Do not dispose of the inverter together with household waste.

The inverter does not have a transformer. Disconnect the inverter from all the external power sources before maintenance! Read the user manual before maintenance!
Burn danger due to the hot surface that may exceed 60.

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2 Product Description

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Symbol

Explanation Danger to life due to high voltages! Do not touch live parts for 10 minutes after disconnection from the power sources. Only qualified personnel can open and maintain the inverter.
External protective grounding terminal.

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

2.4 LED Indicator

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

table 2-1 LED Indicator State Description

LED Color

State On

Definition The inverter is operating normally.

Blue

Blink

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

On

A system fault has occured.

Red

Gray

Off

Both the AC and DC sides are powered down.

Voltage may still be present in AC side circuits after the indicator is off. Pay attention to the electricity safety when operating.
2.5 Circuit Diagram
The following figure shows the main circuit of the inverter.

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2 Product Description

figure 2-4 Circuit Diagram (SG5.0RT for example) · DC Switches can safely disconnect the PV input when necessary to ensure the safe op-
eration of the inverter and the safety of personnel. · The DC SPD provides a discharge circuit for the DC side overvoltage to prevent it from
damaging the internal circuits of the inverter. · EMI filters can filter out the electromagnetic interference inside the inverter to ensure that
the inverter meets the requirements of electromagnetic compatibility standards. · The MPPT is used to ensure a maximum power from PV arrays at different PV input
conditions. · The Inverter Circuit converts the DC power into grid-compliant AC power and feeds it into
the grid. · The AC filter filters the output AC component of high frequency to ensure that the output
current meets the grid requirements. · The AC relay isolates the AC output of the inverter from the grid, making the inverter safe
from the grid in case of inverter failure or grid failure. · The AC SPD provides a discharge circuit for the AC side overvoltage to prevent it from
damaging the internal circuits of the inverter.
If the lightning level exceeds the protection level of the product, surge protection and overvoltage protection may fail, resulting in electric shock and fatal injury!
2.6 Function Description
Basic Function · Conversion function
The inverter converts the DC power from the PV array to the AC power, in conformity with the grid requirements. · Data storage The inverter logs running information, error records, etc. · Parameter configuration
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2 Product Description

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The inverter provides various parameter configurations for optimal operation. Parameters can be set via the iSolarCloud App or the cloud server. · Communication interface
The inverter is equipped with two communication interfaces.The communication device can be connected to the inverter via both interfaces.
After communication connection is established, users can view inverter information, operational data and can set inverter parameters through the iSolarCloud.

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

· Protection Function
Several protective functions are integrated in the inverter, including short circuit protection, grounding insulation resistance monitoring, residual current protection, grid monitoring, DC overvoltage/overcurrent protection, etc. Earth Fault Alarm The inverter is equipped with a DO relay for the local earth fault alarm. The additional equipment required is a light indicator and/or a buzzer that needs additional power supply. After the connection, if the earth fault occurs, the DO dry-contact will switch on automatically to signal the external alarm. DRM (“AU”/”NZ”) The DRM function is only applicable to a single inverter. The inverter provides terminals for connecting to a Demand Response Enabling Device (DRED). After the connection, the DRED asserts demand response modes (DRMs). The inverter detects and initiates a response to all supported demand response modes listed in the following table.
table 2-2 Demand Response Mode Explanation
Mode Explanation
DRM0 The inverter is in the state of shutdown.
Ripple Control The inverter provides terminals (DRM) for connecting to a Ripple Control Receiver (RCR). After the connection, the grid dispatching center issues regulation instructions via dry contact (DI). The inverter can control power output according to the local preset instructions. PID Recovery
· For positive voltage scheme, after the PID function 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.
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2 Product Description

· For negative voltage scheme, after the PID function 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 its corresponding user manual.
· If the voltage scheme for the PID recovery function does not meet the requirement of corresponding PV modules, the PID function will not work as expected or even damage the PV modules.
When the inverter is not running, the PID module will apply inverse voltage to PV modules, to restore the degraded modules.
· If the PID recovery function is enabled, it only works at night. · After the PID recovery function is enabled, the voltage of the PV strings to
ground is 500 V DC by default, and the default value can be modified through the App.
Auto-test (for Italy CEI0-21 Grid Code Only) The Italy CEI0-21 grid code requires auto-test for the inverter before grid connection. During the auto- test, the inverter checks the protection threshold and protection time of the 1-level overvoltage (59.S1), 2-level overvoltage (59.S2),1-level undervoltage (27.S1), 2-level undervoltage (27. S2),1-level overfrequency (81>. S1), 2-level overfrequency (81>. S2), 1-level underfrequency (81<.S1), 2-level underfrequency (81<.S2) to ensure that the inverter could
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2 Product Description

User Manual

meet the requirements of CEI0-21 to protect the grid from abnormality after the inverter is operational. AFCI Function(Optional) · AFCI activation
This function can be enabled to detect whether serial fault arc occurs in the loop between PV array and inverter. · AFCI self-test
This function is intended to test whether AFCI works as normal. · Clear AFCI Alarm
When the inverter detects the AFCI alarm, it stops working. Clear the AFCI alarm so that the inverter can restart the detection.
The fault arc detection function meets the standard requirements, please test under the working conditions as required by the standard.

SPI Function(for Italy CEI0-21 Grid Code Only) The inverter SPI interface, only for Italy, is able to easily choose the grid protection mode based on the local plant requirements:

· Local SPI Mode: protected by the preset values in inverter. · External SPI Mode: protected by a separate SPI protection device on site.

Plant Size SPI Control Modes

11.08 kVA
Local SPI Mode (Default in Inverter)

SPI Interface

Integrated in Inverter

External

SPI Sig-

nal

0

0

Setting

Local

0

SPI Sig-

nal

(Default in

1

Setting

Inverter)

11.08 kVA

Local SPI Mode (Default in Inverter)
Integrated in Inverter

External SPI Mode
Separate SPI Protection Device on Site

0

0

1

0

(Default in

1

1

Inverter)

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2 Product Description

Plant Size 59.S1 59.S2 27.S1 27.S2 81>.S1 81<.S1 81>.S2 81<.S2
Notes

11.08 kVA

11.08 kVA

253 V / < 603 s
264.5 V / 0.2 s
195.5 V / 1.5 s
34.5 V / 0.2 s
—
—
51.5 Hz / 0.1 s
47.5 Hz / 0.1 s

253 V / < 603 s
264.5 V / 0.2 s
195.5 V / 1.5 s
34.5 V / 0.2 s 50.2 Hz / 0.1
s 49.8 Hz / 0.1
s 51.5 Hz / 0.1
s 47.5 Hz / 0.1
s

253 V / < 603 s
264.5 V / 0.2 s
195.5 V / 1.5 s
34.5 V / 0.2 s
—
—
51.5 Hz / 0.1 s
51.5 Hz / 0.1 s

253 V / < 603 s
264.5 V / 0.2 s
195.5 V / 1.5 s
34.5 V / 0.2 s 50.2 Hz / 0.1
s 49.8 Hz / 0.1
s 51.5 Hz / 0.1
s 51.5 Hz / 0.1
s

—

—

—

—

253 V / <603 s
264.5 V / <4 s
195.5 V / <4 s
34.5 V / <4 s 51.5 Hz / <4
s 47.5 Hz / <4
s 51.5 Hz / <4
s 47.5 Hz / <4
s Values from SPI Protection Device on site shall not exceed the above

Optimizer Functions · Module-level MPPT

Increase the power generation of the PV system by continuously tracking the maximum power point of the PV module.
· Module-level shutdown

Quickly reduce module voltage. · Module-level monitoring

The optimizer can monitor the performance of modules. · Module-level IV curve diagnosis

The optimizer can scan the module IV curve and judge whether a module fault occurs.

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Unpacking and Storage

3.1 Unpacking and Inspection
The product is thoroughly tested and strictly inspected before delivery. Nonetheless, damage may still occur during shipping. For this reason, please conduct a thorough inspection after receiving the product. · Check the packing case for any visible damage. · Check the scope of delivery for completeness according to the packing list. · Check the inner contents for damage after unpacking. Contact SUNGROW or the transport company in case of any damage or incompleteness, and provide photos to facilitate services. Do not dispose of the original packing case. It is recommended to store the device in the original packing case when the product is decommissioned.
· After receiving the product, check whether the appearance and structural parts of the device are damaged, and check whether the packing list is consistent with the actual ordered product. If there are problems with the above inspection items, do not install the device and contact your distributor first. If the problem persists, contact SUNGROW in time.
· If any tool is used for unpacking, be careful not to damage the product.
3.2 Inverter Storage
Proper storage is required if the inverter is not installed immediately. · Store the inverter in the original packing case with the desiccant inside. · The storage temperature must be always between -30 and +70, and the storage rel-
ative humidity must be always between 0 and 95 %, non-condensing. · In case of stacking storage, the number of stacking layers should never exceed the limit
marked on the outer side of the packing case. · The packing case should be upright. · If the inverter needs to be transported again, pack it strictly before loading and transport-
ing it. · Do not store the inverter in places susceptible to direct sunlight, rain, and strong electric
field.
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User Manual

3 Unpacking and Storage

· Do not place the inverter in places with items that may affect or damage the inverter.
· Store the inverter in a clean and dry place to prevent dust and water vapor from eroding.
· Do not store the inverter in places with corrosive substances or susceptible to rodents and insects.
· Carry out periodic inspections. Inspection shall be conducted at least once every six months. If any insect or rodent bites are found, replace the packaging materials in time.
· If the inverter has been stored for more than a year, inspection and testing by professionals are required before it can be put into operation.

Please store the inverter according to the storage requirements. Product damage caused by failure to meet the storage requirements is not covered by the warranty.

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Mechanical Mounting

Respect all local standards and requirements during mechanical installation.
4.1 Safety During Mounting
Make sure there is no electrical connection before installation. Before drilling, avoid the water and electricity wiring in the wall.
Poor installation environment will affect system performance! · Install the inverter in a well-ventilated place. · Ensure that the heat dissipation system or vent is not blocked. · Do not install the inverter in an environment with flammable and explosive ob-
jects or smoke.
Improper handling may cause personal injury! · When moving the inverter, be aware of its weight and keep the balance to pre-
vent it from tilting or falling. · Wear proper protective equipment before performing operations on the inverter. · The bottom terminals and interfaces of the inverter cannot directly contact the
ground or other supports. The inverter cannot be directly placed on the ground.
When installing devices, ensure that no device in the system causes it hard for the DC switch and the AC circuit breaker to act or hinders maintenance personnel from operating. If drilling is required during installation: · Wear goggles and protective gloves when drilling holes. · Make sure to avoid the water and electricity wiring in the wall before drilling. · Protect the product from shavings and dust.
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User Manual

4 Mechanical Mounting

4.2 Location Requirements

To a large extent, a proper installation location ensures safe operation, service life, and performance of the inverter.
· The inverter with protection rating IP65 can be installed both indoors and outdoors.
· The inverter should be installed at a height that allows easy viewing of the LED indicator panel, as well as easy electrical connection, operation and maintenance.

4.2.1 Environment Requirements · The installation environment must be free of inflammable or explosive materials. · The location should not be accessible to children. · The ambient temperature and relative humidity must meet the following requirements.
· Install the inverter in a sheltered area to avoid direct sunlight and bad weather (e.g. snow, rain, lightning, etc.). The inverter will derate in high temperature environments for protection. If the inverter is installed in direct sunlight, it may cause power reduction as the temperature rises.
· The inverter is IP65 rated. In dusty environments such as places full of dust, smoke, or cotton fibers, particles may cling to the device’s air outlet or heat sink, thus impacting its heat dissipation performance or even getting it damaged. Therefore, it is prohibited to install the inverter in dusty environments. If the inverter has to be installed in such environments, please clean its fans and heat sink on a regular basis to ensure a good heat dissipation performance.
· The inverter should be well ventilated. Ensure air circulation. · It is strictly prohibited to install the inverter in environments with vibration and strong elec-
tromagnetic field. Strong-magnetic-field environments refer to places where magnetic field strength measures over 30A/m. · The inverter generates noise during operation and is not recommended to be installed in living areas.
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4 Mechanical Mounting

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4.2.2 Carrier Requirements
The mounting structure where the inverter is installed must comply with local/national standards and guidelines. Ensure that the installation surface is solid enough to bear four times the weight of the inverter and is suitable for the dimensions of the inverter (e.g. cement walls, plasterboard walls, etc.). The structure should meet the following requirements:

4.2.3 Angle Requirements
nstall the inverter vertically. Never install the inverter horizontally, or at forward/backward tilted, side tilted, or upside down.

4.2.4 Clearance Requirements Reserve enough clearance around the inverter to ensure sufficient space for heat dissipation.
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In case of multiple inverters, reserve specific clearance between the 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. table 4-1 Tool specification

Goggles

Earplugs

Dust mask

Safety gloves

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Safety shoes

Utility knife

Marker

Anti-static wrist strap

Wire cutter

Wire stripper

Hydraulic pliers

Rubber mallet

Hammer drill (10)

Phillips screwdriver (M3, M4, M6)

Electric screwdriver (M3, M4, M6)

Open-end wrench (30 mm, 35 mm, 46
mm)

RJ45 crimping tool Vacuum cleaner

Measuring tape

Heat shrink tubing

Heat gun

OT terminal crimping tool (4 mm2­6
mm2)

MC4 terminal crimping tool (0.5 mm2­
1.0 mm2)

Multimeter ( 1100 Vdc)

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Slotted screwdriver (M2)

Connector wrench

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.

Improper handling may cause personal injury!
· Arrange an appropriate number of personnel to carry the inverter according to its weight, and installation personnel should wear protective equipment such as anti-impact shoes and gloves.
· Attention must be paid to the center of gravity of the inverter to avoid tilting during handling.
· Placing the inverter directly on a hard ground may cause damage to its metal enclosure. Protective materials such as sponge pad or foam cushion should be placed underneath the inverter.
· Move the inverter by holding the handles on it. Do not move the inverter by holding the terminals.
4.5 Installing the Inverter
Inverter is installed on the wall by means of wall-mounting bracket and the expansion plug sets. The expansion plug set shown below is recommended for the installation.

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(1) Self-tapping screw M6

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

Step 1 Place the wall-mounting bracket to a proper position on the wall. Observe the level on the bracket and adjust until the bubble is in the middle position. Mark the positions and drill the holes.

The depth of the holes should be about 70 mm.

• The image shown here is for reference only. The actual product received may differ.
  Step 2 Place the expansion tubes into the holes. Then secure the wall-mounting bracket to the wall firmly with the expansion bolt sets.

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Step 3 Lift the inverter and slide it down along the wall-mounting bracket to make sure they match perfectly. Use the fastener set to lock the device.

– – End

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4.6 Installing Optimizer(Optional)

Step 1 As shown in the figure below, clamp the optimizer parallel to the back of the PV module by clips.

· Please ensure that the optimizer is installed facing the back of the module. Otherwise, the clip may get damaged.
· Do not forcibly bend the clips when installing the optimizer by clips. Otherwise, the clip may be damaged.
· Do not clamp the optimizer into holes in the module frame during installation. Otherwise, the optimizer cannot be removed or the clips may be damaged.
· It is recommended to install optimizers on the same side of modules. · Do not clamp and remove the optimizer multiple times. Otherwise, the clip may
become loose, affecting normal use. – – End 28

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5.1 Safety Instructions
The PV string will generate lethal high voltage when exposed to sunlight. · Operators must wear proper personal protective equipment during electrical
connections. · Must ensure that cables are voltage-free with a measuring instrument before
touching DC cables. · Respect all safety instructions listed in relevant documents about PV strings.
· Before electrical connections, please make sure that the inverter switch and all switches connected to the inverter are set to “OFF”, otherwise electric shock may occur!
· Ensure that the inverter is undamaged and all cables are voltage free before performing electrical work.
· Do not close the AC circuit breaker until the electrical connection is completed.
Do not damage the ground conductor. Do not operate the product in the absence of a properly installed ground conductor. Otherwise, it may cause personal injury or product damage. Please use measuring devices with an appropriate range. Overvoltage can damage the measuring device and cause personal injury. Damage to the product caused by incorrect wiring is not covered by the warranty. · Electrical connection must be performed by professionals. · Operators must wear proper personal protective equipment during electrical
connections. · All cables used in the PV generation system must be firmly attached, properly
insulated, and adequately dimensioned. Cables used shall comply with the requirements of local laws and regulations. · The factors that affect cable selection include rated current, cable type, routing mode, ambient temperature, and maximum expected line loss.
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All electrical connections must comply with local and national/regional electrical standards.
· Cables used by the user shall comply with the requirements of local laws and regulations.
· Only with the permission of the national/regional grid department, the inverter can be connected to the grid.

· Install the external protective grounding cable first when performing electrical connection and remove the external protective grounding cable last when removing the inverter.
· Keep the AC output cable and the DC input cable close to each other during electrical connection.
· Comply with the safety instructions related to PV strings and the regulations related to the utility grid.

· After being crimped, the OT terminal must wrap the wires completely, and the wires must contact the OT terminal closely.
· When using a heat gun, protect the device from being scorched.
· Keep the PV+ cable and PV­ cable close to each other when connecting DC input cables.
· Before connecting a power cable (such as the AC cable, the DC cable, etc.), confirm that the label and identifier on the power cable are correct.
· When laying out communication cables, separate them from power cables and keep them away from strong interference sources to prevent communication interruption.
· All vacant terminals must be covered with waterproof covers to prevent affecting the protection performance.
· Ensure that AC output cables are firmly connected. Failing to do so may cause inverter malfunction or damage to its AC connectors.
· When the wiring is completed, seal the gap at the cable inlet and outlet holes with fireproof/waterproof materials such as fireproof mud to prevent foreign matter or moisture from entering and affecting the long-term normal operation of the inverter.

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

5.2 Terminal Description
All electrical terminals are located at the bottom of the inverter.

figure 5-1 Terminals (SG20RT for example)

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

table 5-1 Terminal Description
No. Name PV1+, PV1­, PV2+,
1 PV2­, PV3+, PV3­, PV4+, PV4­
2 COM1
3 AC

Description
MC4 terminals for PV input. The terminal number depends on inverter model. Communication accessory port to be connected to WiNet-S/WiNet-S2 for countries except Brazil or to WiFi for Brazil. AC terminal to connect to the grid.

Decisive Voltage Classification DVC-C
DVC-A
DVC-C

4

External grounding terminal.

Not applicable

5 COM2

Communication connection for DI/ DRM, DO, Logger, and meter.

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

DVC-A

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figure 5-2 Label of COM2 Terminal

table 5-2 Label Description of COM2 Terminal

Label RSD NS DRM
RS485-1
DO RS485-3 Meter

RSD-1, RSD-2 NS-1, NS-2 D1/5, D2/6, D3/7, D4/8, R, C
A1, B1
NO, COM
A3, B3 A2, B2

Description
For inverter emergency stop
For inverter emergency stop For external Demand Response Enabling Device (“AU”/ “NZ”) For Ripple Control For inverter daisy chain (Cannot be used simultaneously with COM1 port for WiNetS/WiNet-S2) External alarm interface, e.g. light indicator and/or buzzer The external DC voltage should not be higher than 30 V and the current not higher than 1 A. Reserved Meter interface

5.3 Electrical Connection Overview
The SG3.0-20RT electrical connection should be realized as follows:

(A) PV string (D) External device
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(B) Inverter (E) AC circuit breaker

(C) Grid (F) Meter

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The SG5.0-20RT-P2 electrical connection should be realized as follows (Includes optimizer):

(A) PV string (D) Grid (G) Meter

(B) Optimizer (E) External device

(C) Inverter (F) AC circuit breaker

table 5-3 Cable Requirements

No. Cable

Type

Cable Diameter

Outdoor multi-core

copper wire cable

1 DC cable

complying with

6 mm­9 mm

1100 V and 30 A

standard

2 Ethernet

CAT 5E outdoor

cable

shielded network 5.3 mm­7 mm

cable

3 Meter

Shielded twisted

RS485 cable
(1)

pair

5.3 mm­7 mm

Wire Conductor Cross-section 4 mm2­6 mm2
8 0.2 mm2 2 (0.5­1.0) mm2

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No. Cable
4 AC cable (2)
Additional 5 Grounding
cable

Type
Outdoor 5-core copper wire cable

Cable Diameter
SG3.0RT to SG12RT, SG5.0RT­P2 to SG12RT­P2: 10 mm­21 mm SG15RT to SG20RT, SG15RT­ P2 to SG20RT­P2: 14 mm­25 mm

Wire Conductor Cross-section
SG3.0RT to SG12RT, SG5.0RT­P2 to SG12RT­P2: 4 mm2­ 6 mm2
SG15RT to SG20RT, SG15RT­P2 to SG20RT­P2: 6 mm2­ 10 mm2

Outdoor single-core The same as that of the PE wire in the AC copper wire cable cable

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

5.4 External Protective Grounding Connection

Electric shock!
· Make sure that the grounding cable is connected reliably. Otherwise, it may cause electric shock.

· Since the inverter is not equipped with a transformer, neither the negative electrode nor the positive electrode of the PV string can be grounded. Otherwise, the inverter will not operate normally.
· Connect the grounding terminal to the external protective grounding point before AC cable connection, PV string connection, and communication cable connection.
· The external protective grounding point provides a reliable ground connection. Do not use an improper grounding conductor for grounding, Otherwise, it may cause product damage or personal injury.
· Depending on Local Rules, please also ground the PV panel subconstruction to the same common grounding point (PE Bar) in addition to local lightning protection rules.

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The external protective grounding terminal must meet at least one of the following requirements.
· The cross-sectional area of the grounding cable is not less than 10 mm2 for copper wire or 16 mm2 for aluminum wire. It is recommended that both the external protective grounding terminal and the AC side grounding terminal be reliably grounded.
· If the cross-sectional area of the grounding cable is less than 10 mm2 for copper wire or 16 mm2 for aluminum wire, ensure that both the external protective grounding terminal and the AC side grounding terminal are reliably grounded.
The grounding connection can be made by other means if they are in accordance with the local standards and regulations, and SUNGROW shall not be held liable for the possible consequences.
5.4.1 External Protective Grounding Requirements
All non-current carrying metal parts and device enclosures in the PV power system should be grounded, for example, brackets of PV modules and inverter enclosure. When there is only one inverter in the PV system, connect the external protective grounding cable to a nearby grounding point. When there are multiple inverters in the PV system, connect the external protective grounding terminals of all inverters and the grounding points of the PV module brackets to ensure equipotential connections to ground cables (according to the onsite conditions).
5.4.2 Connection Procedure
External grounding cable and OT/DT terminal are prepared by customers.

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Step 1 Prepare the cable and OT/DT terminal.

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(1) Heat shrink tubing

(2) OT/DT terminal

After being crimped, the OT terminal must wrap the wires completely, and the wires must contact the OT terminal closely. When using a heat gun, protect the device from being scorched.
Step 2 Remove the screw on the grounding terminal and fasten the cable with a screwdriver.

Step 3 Apply paint to the grounding terminal to ensure corrosion resistance. – – End
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5.5 AC Cable Connection
5.5.1 AC Side Requirements

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

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

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

Inverter Model SG3.0RT/SG4.0RT/SG5.0RT/ SG6.0RT/SG5.0RT-P2/SG6.0RTP2 SG7.0RT/SG8.0RT/SG7.0RT-P2/ SG8.0RT-P2 SG10RT/SG10RT-P2 SG12RT/SG12RT-P2 SG15RT/SG17RT/SG15RT-P2/ SG17RT-P2 SG20RT/SG20RT-P2

Recommended Specification
16 A
20 A 25 A 32 A 40 A 50 A

AC circuit breakers should be installed on the output side of the inverter and the grid side to ensure safe disconnection from the grid.
· Determine whether an AC circuit breaker with greater overcurrent capacity is required based on actual conditions.
· Do not connect any local load between the inverter and the AC circuit breaker. · Multiple inverters cannot share one AC circuit breaker.
Residual Current Monitoring Device With an integrated universal current- sensitive residual current monitoring unit included, the inverter will disconnect immediately from the mains power once a fault current with a value exceeding the limit is detected.

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However if an external residual current device (RCD) (type A is recommended) is mandatory, the switch must be triggered at a residual current of 300 mA (recommended). RCD of other specifications can also be used according to local standard. In Australia, a RCD is not required according to the local standard AS3000-2018 when either of the following installation methods is adopted if the PV array capacitance to ground is large (such as a tin roof):
· Use heavy duty conduits (such as metal bushing) when run PV and AC cables through Cavity walls.
· Route the PV and AC cables through pipes (PVC or metal tubing), lay the cables and install them.
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 5. Otherwise, please contact SUNGROW for technical scheme.
5.5.2 Assembling the AC Connector (< 15 kW)
The AC terminal block is on the bottom side of the inverter. AC connection is the threephase-four-wire grid + PE connection (L1, L2, L3, N, and PE).
Step 1 Unscrew the swivel nut of the AC connector.

Step 2 Take out the spring-loaded terminal from the housing.

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Step 3 Thread the AC cable of appropriate length through the swivel nut, the sealing ring and the housing.

Step 4 Remove 45 mm of the cable jacket and 12 mm­16 mm of the wire insulation.
Step 5 Open the clamp on the spring-loaded terminal and insert the wires into the corresponding holes. Close the clamp and push the terminal into the housing until there is an audible click.

Observe the terminal assignment. Do not connect any phase line to the “PE” terminal or PE wire to “N” terminal. Otherwise, unrecoverable damage to the inverter may follow.
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Step 6 Ensure that the wires are securely in place by slightly pulling them. Tighten the swivel nut to the housing.

– – End 5.5.3 Installing the AC Connector (< 15 kW)
High voltage may be present in inverter! Ensure all cables are voltage-free before electrical connection. Do not connect the AC circuit breaker until all inverter electrical connections are completed.
Step 1 Disconnect the AC circuit breaker and secure it against reconnection. Step 2 Remove the waterproof lid from the AC terminal.

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Step 3 Lift the locking part upwards and insert the AC connector into the AC terminal on the bottom side of the inverter. Then press the locking part and secure it with the screw.

Step 4 Connect the PE wire to ground and the phase lines and the “N” line to AC circuit breaker. Then Connect the AC circuit breaker to electric board.
Step 5 Make sure all wires are firmly installed via the right torque tool or dragging the cables slightly. – – End
5.5.4 Assembling the AC Connector ( 15 kW) The AC terminal block is on the bottom side of the inverter. AC connection is the threephase-four-wire grid + PE connection (L1, L2, L3, N, and PE).
Step 1 Unscrew the swivel nut of the AC connector.
Step 2 (Optional) Remove the inner sealing ring if the cable diameter is 19 mm­25 mm. Otherwise skip this step.
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Step 3 Take out the screw-type terminal plug from the housing.

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Step 4 Thread the AC cable of appropriate length through the swivel nut and the housing.

Step 5 Remove 80 mm­90 mm of the cable jacket and 12 mm of the wire insulation.
Step 6 (Optional) When using a multi-core multi-strand copper wire cable, connect the AC wire head to the cord end terminal (hand-tight). In case of single-strand copper wire, skip this step.

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Step 7 Fix all the wires to the screw-type terminal according to the assignment and tighten to a torque of 1.2 N·m­ 1.5 N·m with a screwdriver. Then push the terminal into the housing until there is an audible click.

Observe the terminal assignment. Do not connect any phase line to the “PE” terminal or PE wire to “N” terminal. Otherwise, unrecoverable damage to the inverter may follow. Step 8 Ensure that the wires are securely in place by slightly pulling them. Tighten the swivel nut to the housing.
– – End 5.5.5 Installing the AC Connector ( 15 kW)
High voltage may be present in inverter! Ensure all cables are voltage-free before electrical connection. Do not connect the AC circuit breaker until all inverter electrical connections are completed. Step 1 Disconnect the AC circuit breaker and secure it against reconnection.
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Step 2 Remove the waterproof lid from the AC terminal.

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Step 3 Insert the AC connector into the AC terminal on the bottom of the inverter until there is an audible sound.

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Step 4 (Optional) Secure the AC connector, as shown in the figure below.

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Step 5 Connect the PE wire to ground and the phase lines and the “N” line to AC circuit breaker. Then connect the AC circuit breaker to electric board.
Step 6 Make sure all wires are firmly installed via the right torque tool or dragging the cables slightly. – – End
5.6 DC Cable Connection
The PV string will generate lethal high voltage when exposed to sunlight. · Respect all safety instructions listed in relevant documents about PV strings.

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· Make sure the PV array is well insulated to ground before connecting it to the inverter.
· Make sure the maximum DC voltage and the maximum short circuit current of any string never exceed inverter permitted values specified in “Technical Data”.
· Check the positive and negative polarity of the PV strings, and connect the PV connectors to corresponding terminals only after ensuring polarity correctness.
· During the installation and operation of the inverter, please ensure that the positive or negative electrodes of PV strings do not short-circuit to the ground. Otherwise, an AC or DC short-circuit may occur, resulting in equipment damage. The damage caused by this is not covered by the warranty.
· Electric arc or contactor over-temperature may occur if the DC connectors are not firmly in place, and the loss caused is not covered by the warranty.
· If the DC input cables are reversely connected or the positive and negative terminals of different MPPT are shorted to ground at the same time, while the DC switch is in the “ON” position, do not operate immediately. Otherwise, the inverter may be damaged. Please turn the DC switch to “OFF” and remove the DC connector to adjust the polarity of the strings when the string current is lower than 0.5 A.
· Use the DC connectors supplied with the product for DC cable connection. Using incompatible DC connectors may result in serious consequences, and the device damage is not covered under warranty.
· Inverters do not support full parallel connection of strings (Full parallel connection refers to a connection method in that strings are connected in parallel and then connected to the inverter separately).
· Do not connect one PV string to multiple inverters. Otherwise, the inverters may be damaged.

The following requirements about PV string connection must be met. Otherwise, it may cause irreversible damage to the inverter, which is not covered by the warranty.
· Mixed use of PV modules of different brands or models in one MPPT circuit, or PV modules of different orientation or inclination in a string 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, 160 V to 1,000 V.

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Note the following items when laying out cables on site:
· The axial tension on PV connectors must not exceed 80 N. Avoid axial cable stress on the connector for a long time during field wiring.
· Radial stress or torque must not be generated on PV connectors. It may cause the connector waterproof failure and reduce connector reliability.
· Leave at least 50 mm of slack to avoid the external force generated by the cable bending affecting the waterproof performance.
· Refer to the specifications provided by the cable manufacturer for the minimum cable bending radius. If the required bending radius is less than 50 mm, reserve a bending radius of 50 mm. If the required bending radius is greater than 50 mm, reserve the required minimum bending radius during wiring.
5.6.1 PV Input Configuration
· The inverters SG3.0RT/SG4.0RT/SG5.0RT/SG6.0RT/SG5.0RT-P2/SG6.0RT-P2 have two PV inputs, SG7.0RT/SG8.0RT/SG10RT/SG12RT/SG7.0RT-P2/SG8.0RT-P2/ SG10RT-P2/SG12RT-P2 have three PV inputs and SG15RT/SG17RT/SG20RT/ SG15RT-P2/SG17RT-P2/SG20RT-P2 have four PV inputs.
· The inverters have two MPP trackers. Each DC input area can operate independently.
· The PV strings to the same DC input area should have the same type, the same number of PV panels, identical tilt and identical orientation for maximum power.
· The PV strings to two DC input areas may differ from each other, including PV module type, number of PV modules in each string, angle of tilt, and installation orientation.

figure 5-3 PV Input Configuration (SG20RT for example)

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

Inverter Model All models

Open-circuit Voltage Limit 1100 V

Max. current for input connector 30 A

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The following figure shows the open-circuit voltage limits at different altitudes. Before configuring the PV panels, need to take this derating curve in consideration under high altitude situation.

figure 5-4 Open-circuit Voltage Derating Curve
5.6.2 Assembling PV Connectors
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. To ensure IP65 protection, use only the supplied connector.
Step 1 Strip 7 mm­8 mm of the insulation from each PV cable.
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Step 2 Assemble the cable ends with the crimping pliers.

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1: Positive crimp contact

2: Negative crimp contact

Step 3 For some countries such as Australia where the DC protection cover delivered separately need to be installed on site, please firstly lead the PV cables through the waterproof terminal on the DC protection cover before assembling the connector. See the guidance with the DC protection cover for details.

PV cables with connectors cannot go through the waterproof terminal on the DC protection cover. Rework may cause damage to the connectors, which will not be covered by the warranty.
Step 4 Lead the cable through the 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 5 Check for polarity correctness. – – End
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5.6.3 Installing the PV Connectors 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 1,100 V.
The multimeter must have a DC voltage range of at least 1100 V. If the voltage is a negative value, the DC input polarity is incorrect. Please correct the DC input polarity. If the voltage is greater than 1100V, too many PV modules are configured to the same string. Please remove some PV modules. Step 3 Connect the PV connectors to corresponding terminals until there is an audible click. Seal the unused PV terminals with the terminal caps.

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Step 4 Connect the PV+ and PV- of the optimizer to the positive and negative terminals in the junction box of the PV module respectively.

Do not connect the PV module to the OUT+ and OUT- of the optimizer. Otherwise, the optimizer or PV module will be damaged, and the loss is not covered by the warranty.

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Step 5 Connect the positive probe of a multimeter to OUT- of the optimizer, and the negative probe of the multimeter to OUT+ of the optimizer to check whether the optimizer is faulty. If typical value of output voltage is 1V, no fault occurs to the optimizer.

1. Use a multimeter to measure the output voltage of each optimizer after wiring. 2. Considering the effect of the accuracy of the multimeter on the actual measurement on site, the optimizer can function normally as long as the output voltage falls in the range of 0.9V – 1.1V. 3. If the output voltage is less than 0.9 V, check the following items: · Check whether the sunlight is sufficient. · Check whether the input side of the optimizer is connected to the PV module. · If the fault is not caused by foregoing reasons and still persists, please replace
the optimizer. 4. If the output voltage is greater than 1.1 V, the optimizer fails. Please replace the optimizer. 5. If no voltage is detected, replace the optimizer or component.
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Step 6 When connecting multiple optimizers, connect OUT- of the first optimizer to OUT+ of the second optimizer, and so on. Use a multimeter to measure the optimizer voltage. If typical value of output voltage is 1V*N (N is the number of optimizers), no fault occurs to the system.

Whether connecting OUT+ of the first optimizer to OUT- of the second optimizer or connecting OUT- of the first optimizer to OUT+ of the second optimizer is dependent on the polarity of the extension cable that is connected to the inverter on site.

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Step 7 Connect OUT+ of the first optimizer and OUT- of the last optimizer to the PV input terminals of the inverter.

If each PV module is equipped with an optimizer, the total power of PV modules in a PV input shall not exceed the maximum input power of a single PV input of the inverter.
· Branch-connector connection on the input side of the inverter is not supported by the optimizer.
· Please refer to the optimizer user manual for details.
– – End
5.7 WiNet-S/WiNet-S2 Connection
SG3.0-20RT uses WiNet-S2 module, and the WiNet-S2 module supports Ethernet communication and WLAN communication. It is not recommended to use both communication methods at the same time. SG5.0-20RT-P2 is used with optimizer, and uses WiNet-S module. The WiNet-S module supports Ethernet communication and WLAN communication. It supports EasyConnect and can receive and transmit data of optimizers, meters, and chargers.
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The WiNet-S/WiNet-S2 communication for Ethernet cannot be used simultaneously with A1 and B1 terminals for RS485 daisy chain. For details, see the quick guide for the WiNet-S module. Scan the following QR code for the quick guide.

For more information about WiNet-S2, please scan the following QR code to view the quick guide.

5.7.1 Ethernet Communication
The WiNet-S/WiNet-S2 communication for Ethernet cannot be used simultaneously with A1 and B1 terminals for RS485 daisy chain.
Step 1 (Optional) Strip the insulation layer of the communication cable with an Ethernet wire stripper, and lead the corresponding signal cables out. Insert the stripped communication cable into the RJ45 plug in the correct order, and crimp it with a crimper.

1: RJ45 plug

2: Protective cap

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

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

Step 3 Unscrew the housing from the communication module.

Step 4 Thread the network cable through the swivel nut and gasket. Afterwards, route the cable into the opening of the sealing. Finally, insert the cable through the housing.

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Step 5 Insert the RJ45 plug into the front plug connector until there is an audible click and tighten the housing. Install the gasket and fasten the swivel nut.

Step 6 Remove the waterproof lid from the COM1 terminal and install WiNet-S/WiNet-S2.

Step 7 Slightly shake it by hand to determine whether it is installed firmly. – – End
5.7.2 WLAN Communication Step 1 Remove the waterproof lid from the COM1 terminal.
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Step 2 Install the module. Slightly shake it by hand to determine whether it is installed firmly, as shown below.

Step 3 Refer to the guide delivered with the module for the set-up. – – End
5.8 WiFi Connection (for Brazil)
Step 1 Remove the waterproof lid from the COM1 terminal. Step 2 Install the module. Slightly shake it by hand to determine whether it is installed firmly, as
shown below.

Step 3 Refer to the guide delivered with the module for the set-up. – – End
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5.9 Meter Connection

In a single inverter scenario, the meter (A2, B2) terminals are designed to connect to the meter for the feed-in power function. The export control functionality has not been tested to AS/ NZS 4777.2:2020. The energy meter is mainly used to detect the direction and magnitude of the current. And the energy meter data may not be used for billing purposes.

The meter is mainly used to detect the direction and magnitude of the current. And the meter data may not be used for billing purposes.
5.9.1 Assembling the COM Connector Step 1 Unscrew the swivel nut from the connector.

Step 2 Take out the terminal block.

Step 3 Remove the seal and lead the cable through the cable gland.

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Step 4 Remove the cable jacket and strip the wire insulation.

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Step 5 (Optional) When using a multi-core multi-strand wire cable, connect the wire head to the cord end terminal. In case of single-strand copper wire, skip this step.

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Step 6 Plug the wires or terminals into the corresponding terminals as shown in the following figure.

figure 5-5 A2, B2 connection Step 7 Ensure that the wires are securely in place by slightly pulling them and insert the terminal
plug into the housing until there is an audible click.
Step 8 Fasten the swivel nut. – – End
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5.9.2 Installing the COM Connector Step 1 Remove the waterproof lid from the COM2 connector.

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Step 2 Insert the COM connector into COM2 terminal on the bottom of the inverter until there is an audible click.

– – End
5.10 RS485 Connection
5.10.1 RS485 Communication System The RS485 (A1, B1) connection can establish the communication between the inverter and an external device, as well as the communication between two inverters in parallel. In case of multiple inverters, all the inverters can be connected via RS485 cables in daisy chain manner.
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figure 5-6 Multi-inverter Connection · The maximum number of inverters allowed to be connected in the same point
of connection is 5. · The RS485 communication cable should be shielded twisted pair cables or
shielded twisted pair Ethernet cables. · The RS485 cable between two devices should be not longer than 10 m. · The RS485 communication cannot be used simultaneously with COM1 port for
WiNet-S/WiNet-S2. · Refer to the manual of Logger for the communication connection to the meter. 5.10.2 Assembling the COM Connector Step 1 Unscrew the swivel nut from the connector.
Step 2 Take out the terminal block.
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Step 3 Remove the seal and lead the cable through the cable gland.

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Step 4 Remove the cable jacket and strip the wire insulation.
Step 5 (Optional) When using a multi-core multi-strand wire cable, connect the wire head to the cord end terminal. In case of single-strand copper wire, skip this step.

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Step 6 Plug the wires or terminals into the corresponding terminals as shown in the following figure.

figure 5-7 A1, B1 connection
Step 7 Ensure that the wires are securely in place by slightly pulling them and insert the terminal plug into the housing until there is an audible click.

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Step 8 For RS485 daisy chain: Crimp two wires A to a two-wire core end terminal and two wires B to another terminal. Plug the terminals to A1 and B1 respectively.

Step 9 Fasten the swivel nut.

figure 5-8 RS485 daisy chain connection

– – End 5.10.3 Installing the COM Connector Step 1 Remove the waterproof lid from the COM2 connector.

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Step 2 Insert the COM connector into COM2 terminal on the bottom of the inverter until there is an audible click.

– – End
5.11 DO Connection
The inverter is equipped with a DO relay for an earth fault alarm. The additional equipment required is a light indicator and/or a buzzer that needs additional power supply. Once fault occurs, the relay trips and the circuit is connected. The external indicator gets on. The relay remains triggered until the fault is removed.
figure 5-9 DO Normal Open Connect The additional DC power supply should comply with related requirements: · Max. voltage: 30 V · Max. current: 1 A Refer to section “5.9.1 Assembling the COM Connector” for detailed assembling procedure. Plug the wires to NO and COM terminals according the labels on the bottom of the inverter.
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Refer to section “5.10.3 Installing the COM Connector” to install the connector.
5.12 DRM Connection
In Australia and New Zealand, the inverter supports the demand response modes as specified in the standard AS/NZS 4777. The following figure shows the wiring between the inverter and the external DRED.

table 5-4 Method of Asserting DRM

Mode

Asserted by Shorting Terminals on Switch Operation on External

Inverter

DRED

DRM0 R & C

Close S1 and S5

Refer to section “5.9.1 Assembling the COM Connector” for detailed assembling procedure. Plug the wires to R and C terminals according the labels on the bottom of the inverter.

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Refer to section “5.10.3 Installing the COM Connector” to install the connector.
5.13 DI Connection
The grid company uses a Ripple Control Receiver to convert the grid dispatching signal and send it as a dry contact signal. The following figure shows the wiring between the inverter and the ripple control receiver.

table 5-5 Method of Asserting DI Mode

S- S2 S3 S4 Switch Operation on

1

External RCR

0 0 0 0 None

1 0 0 0 Close S1 0 1 0 0 Close S2 0 0 1 0 Close S3 1 1 0 0 Close S1 and S2

Output power (in % of the Rated AC output power)
100 % (configurable according to need)
100 % 60 % 30 % 0 % (disconnect from grid)

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Step 1 Unscrew the swivel nut from the connector.
Step 2 Take out the terminal block.

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Step 3 Remove the seal and lead the cable through the cable gland.

Step 4 Remove the cable jacket by 7 mm­10 mm.

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Step 5 Plug the wires into the corresponding terminals as shown in the following figure.

figure 5-10 DI connection Step 6 Ensure that the wires are securely in place by slightly pulling them and insert the terminal
plug into the housing until there is an audible click.
Step 7 Fasten the swivel nut.
Step 8 Refer to section “5.10.3 Installing the COM Connector” to install the connector. – – End
5.14 NS Protection Connection
NS terminal: NS Protection is used for the German market currently. For plants sized more than 30kVA, inverter NS Protection terminals could be used in daisy chain to external NS Protection Relay to realize emergency stop when the NS Protection Relay changes its dry contact status due to the grid abnormal running status. For detailed assembling procedure for inverters in daisy chain mode refer to section “5.10.2 Assembling the COM Connector”.
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For SG3.0­20RT, NS Protection(including Passive Valid) can be set. When NS-1 and NS-2 are connected, the inverters will emergently stop; otherwise, the inverters will operate normally. But if NS Protection is enabled on the iSolarCloud, refer to ” NS Protection(Passive Valid)”, the inverters will operate normally when NS-1 and NS-2 are connected, and the inverters will emergently stop when NS-1 and NS-2 are disconnected. See the table below for details.

table 5-6
NS Protection is disabled on iSolarCloud

NS-1 and NS-2 Shorted Disconnected

Inverter Emergency stop Normal operation

NS Protection is enabled on iSolarCloud

Shorted Disconnected

Normal operation Emergency stop

The recommended wire conductor cross-section is 0.5 – 0.75 mm2,and the maximum wiring distance of NS protection loop must be less than 100 m. Refer to section “5.9.1 Assembling the COM Connector” for detailed assembling procedure. Plug the wires to NS-1 and NS-2 terminals according the labels on the bottom of the inverter. When terminals NS-1 and NS-2 are turned on by the external NS protection relay, the inverter will stop immediately.

Refer to section “5.10.3 Installing the COM Connector” to install the connector. SG5.0-20RT-P2 can be used with optimizers. NS-1 and NS-2, as well as RSD-1 and RSD-2 can be used for emergency stop. See the table below for details:
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table 5-7

NS-1 and NS- RSD-1 and

2

RSD-2

Whether the system contains optimizers
No

Shorted Yes

Shorted No

NS Protection(including Passive Valid) is disabled on iSolarCloud

Disconnected Yes
No

Shorted Yes
Disconnected

No Disconnected
Yes

Inverter
Emergency stop The inverter is in the standby status if the DC voltage is greater than 40 V The inverter is in the emergency stop status if the DC voltage is lower than 40 V Emergency stop The inverter is in the standby status if the DC voltage is greater than 40 V The inverter is in the emergency stop status if the DC voltage is lower than 40 V Emergency stop
The inverter is in the standby status if the DC voltage is greater than 40 V The inverter is in the emergency stop status if the DC voltage is lower than 40 V
Normal operation
Normal operation

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NS-1 and NS- RSD-1 and

2

RSD-2

Whether the system contains optimizers

Inverter

No Shorted
Yes

Normal operation Normal operation

No

Emergency stop

Shorted

Disconnected Yes

The inverter is in the standby status if the DC voltage is greater than 40 V
The inverter is in the emergency stop status if the DC voltage is lower than 40 V

NS Protection(including Passive Valid) is enabled on iSolarCloud

No
Shorted Yes

Disconnected No

Emergency stop
The inverter is in the standby status if the DC voltage is greater than 40 V The inverter is in the emergency stop status if the DC voltage is lower than 40 V
Emergency stop

Disconnected Yes

The inverter is in the standby status if the DC voltage is greater than 40 V
The inverter is in the emergency stop status if the DC voltage is lower than 40 V

Refer to the figure below for short connection between NS-1 and NS-2, RSD-1 and RSD-2.

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Refer to section “5.9.1 Assembling the COM Connector””5.10.3 Installing the COM Connector” for detailed assembling procedure.

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Commissioning

6.1 Inspection Before Commissioning
Check the following items before starting the inverter: · All equipment has been reliably installed. · DC switch(es) and AC circuit breaker are in the “OFF” position. · The ground cable is properly and reliably connected. · The AC cable is properly and reliably connected. · The DC cable is properly and reliably connected. · The communication cable is properly and reliably connected. · The vacant terminals are sealed. · No foreign items, such as tools, are left on the top of the machine or in the junction box (if
there is). · The AC circuit breaker is selected in accordance with the requirements of this manual
and local standards. · All warning signs & labels are intact and legible.
6.2 Powering on the System
If all of the items mentioned above meet the requirements, proceed as follows to start up the inverter for the first time. Step 1 Turn on the AC circuit breaker between the inverter and the grid. Step 2 Rotate the DC switch of the inverter to “ON” position. Step 3 Turn on the external DC switch (if applicable) between the inverter and the PV string. Step 4 If the irradiation and grid conditions meet requirements, the inverter will operate normally. Observe the LED indicator to ensure that the inverter operates normally. Refer to “2.4 Indicator Definition” for details. Step 5 Refer to the quick guide for communication module for its indicator definition. Step 6 Set initial protection parameters via the iSolarCloud App. · For WiFi module, please refer to “7.2 Installing App”, “7.4.2 Login Procedure” and “7.5 In-
itial Settings”. · For WiNet-S/WiNet-S2 module, please refer to sections 6.3 to 6.6. – – End
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· Before closing the AC circuit breaker between the inverter and the power grid, use a multimeter that is set to the AC gear to ensure that the AC voltage is within the specified range. Otherwise, the inverter may be damaged.
· If the DC side is powered up while the AC side is not, the inverter indicator may turn red, and the inverter will report a fault named “Grid Power Outage” (the fault information can be viewed on the iSolarCloud App, see “Records” for details). The fault is automatically cleared when the AC circuit breaker between the inverter and the grid is closed.
6.3 App Preparation
Step 1 Install the iSolarCloud App with latest version. Refer to “7.2 Installing App”. Step 2 Register an account. Refer to “7.3 Account Registration”. If you have got the account and
password from the distributor/installer or SUNGROW, skip this step. Step 3 Download the firmware package to the mobile device in advance. Refer to “Firmware Upa-
date”. This is to avoid download failure due to poor on-site network signal.
– – End
6.4 Plant Creation
Prerequisites: · The account and password for logging in to iSolarCloud App have been obtained from
the distributor/installer or SUNGROW. · The communication device is normally connected to the inverter. · System positioning is enabled and iSolarCloud App is allowed to access location
information.

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Step 1 Open the App, tap address.

in the upper right corner of the interface, and select the correct access

figure 6-1 Select Access Address Step 2 Enter the account and password on the login interface, and tap LOGIN to log in.
Step 3 Tap in the upper right corner to enter the plant creation interface.

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Step 4 Fill in the content according to actual needs, and the parameters containing * are required. Tap Next to enter the next interface.

Parameter Name
Plant name

figure 6-2 Plant Creation Settings Description
The name of the plant.

Plant type

The type of the plant, which should be set corresponding to the actual plant type.

Installed power The installed power of the plant.

Country/Region The country/region where the plant is located.

Time zone

The time zone where the plant is located, which can be filled through automatic positioning and manual input.

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Parameter Name

Description The location of the plant, which can be filled in two ways:

Plant address

· Manually: Manually enter the plant location in the input box.
· Automatically: Tap to automatically obtain the current location or search for the location of the plant, and then tap Confirm.

Grid-connection type

The way the plant is connected to the grid, including 100% Feed-in, Self- Consumption, Zero Export, and Off-grid.

Grid-connected The time when the plant is connected to the grid. date

Owner’s email Fill in the owner information of the plant, and both registered and un-

address

registered email addresses are supported.

Postal code

The postal code of the place where the plant is located.

Plant image

Take photos of the plant and upload them.

The feed-in tariff can be set in two ways:

· Enter the feed-in tariff directly in the input box.

Feed-in tariff

· Tap More Configurations, select the tariff unit, enter the feed-in tariff, and tap Confirm. Enable Time-of-Use Tariff if needed. Tap Add Time-of-Use Tariff, add time intervals and price, and tap Confirm. Please note that if Time-of-use Tariff is enabled, the time periods shall cover 24 hours a day, and can not overlap.

Consumption tariff

Set the consumption tariff as follows:
· Tap More Configurations, select the tariff unit, enter the consumption tariff, and tap Confirm. Enable Time-of-Use Tariff if needed, and refer to the setting methods of the feed-in tariff.

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Step 5 Bind a device through scanning the QR code on the device, manually inputting the device S/ N, or uploading a QR code picture. Tap Confirm after the QR code is identified or the S/N is verified.

Step 6 After a device is bound, tap Device and Commissioning to go to corresponding interface.

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Step 7 Tap Network Configuration to go to the WLAN connection interface. Tap the home network in the WLAN list, enter the password, and then tap Confirm.

Step 8 Enter the Activate EasyConnect interface, and press the multi-function button on the WiNet-S/WiNet-S2 to enable the Easyconnect mode according to the prompt on the screen. The App automatically enters a waiting processing interface if this mode is enabled, and automatically returns to the commissioning interface after the processing is completed.
Only the 2.4 GHz working band is supported under the networking mode. If the Easyconnect fails, please refer to other methods in the WiNet-S/WiNet-S2 manual to establish the connection.
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Step 9 Tap Device Initialization to go to the Device initialization interface. Set the initialization protection parameters as needed and tap Settings to return to the commissioning interface.

When the country is set to Australia, additionally set the applicable network service provider and then the grid type.
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The image shown here is for reference only. Refer to the actual interface for the supported network service providers.

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

Network Service Provider AS/NZS 4777.2:2015 AS/NZS 4777.2:2020 Australia A AS/NZS 4777.2:2020 Australia B AS/NZS 4777.2:2020 Australia C

Grid Type / /
/
/

ENERGEX & Ergon Energy

· STNW1170: single-phase < 10 kVA & three-phase < 30 kVA

· STNW1174: 30 kVA < Pn 1500 kVA

Jemena
Endeavour Energy Ausgrid

· 10 kVA per phase (or 30 kVA per three phase)
· ELE GU 0014: 30 kVA­200 kVA MDI 0043 NS194

CitiPower & Powercor

· 5 kVA for single-phase & 30 kVA for three-phase
· > 30 kVA three-phase

United Energy PowerWater

· UE-ST-2008.1: 10 kVA for singlephase & 30 kVA for three-phase
· UE-ST-2008.2: > 30 kVA three-phase Embedded Generation Notice Photovoltaic Systems:2020

SA Power Networks
Horizon Power westernpower AusNet Services

· TS129-2019: < 10 kW for single-phase & 30 kW for three-phase
· TS130-2017: > 30 kW & 200 kW
· TS131-2018: > 200 kW
· HPC-9DJ-13-0001-2019: 10kVA for single-phase & 30 kVA for three-phase
· HPC-9DJ-13-0002-2019: > 30kVA & 1MVA
EDM#33612889-2019 Basic Micro Embedded Generation: 2020

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

· Please check the country supported by this product at http:// support.sungrowpower.com/.
· Set Country/Region to the country/region where the inverter is installed. Otherwise, the inverter may report a fault.
Step 10 After a plant is successfully created, return to the App home page to view the plant information.
– – End
6.5 Optimizer Physical Layout (Optional)
· If PV modules are installed and optimizers are configured, check to ensure that all devices are reliably installed.
· Remove QR code labels from the optimizers and attach them to corresponding square cells on the physical layout.
· Please refer to the optimizer user manual for details of the optimizer physical layout.

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iSolarCloud App

7.1 Brief Introduction
The iSolarCloud App can establish communication connection to the inverter via the WLAN, providing remote monitoring, data logging and near-end maintenance on the inverter. Users can also view inverter information and set parameters through the App. * To achieve direct login via WLAN, the wireless communication module developed and manufactured by SUNGROW is required. The iSolarCloud App can also establish communication connection to the inverter via Ethernet connection.
· This manual describes only how to achieve near-end maintenance via WLAN direct connection.
· Screenshots in this manual are based on the V2.1.6 App for Android system, and the actual interfaces may differ.
7.2 Installing 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 Account Registration
The account distinguishes two user groups, end user and distributor/installer. · The end user can view plant information, create plants, set parameters, share plants, etc. · The distributor/installer can help the end user to create plants, manage, install, or main-
tain plants, and manage users and organizations. Step 1 Tap REGISTER to enter the registration screen.

Step 2 Select the relevant server for your area.

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

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Step 4 Fill in the registration information, including email, verification code, password and affirmance and country (region). The distributor/installer has the permission to fill in the company name and the code of upper level installer/distributor.
The code of upper level distributor/installer can be obtained from the upper level distributor/installer. Only when your organization belongs to the upper level distributor/installer organization, can you fill in the corresponding code.
Step 5 Tick Accept privacy protocol and tap Register to finish the registration operation. – – End
7.4 Login
7.4.1 Requirements The following requirements should be met: · The AC and DC sides or the AC side of the inverter is powered-on. · The WLAN function of the mobile phone is enabled. · The mobile phone is within the coverage of the wireless network produced by the communication module.
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7.4.2 Login Procedure
Step 1 (Optional) For the WiNet-S/WiNet-S2 module, press the multi-function button 3 times to enable the WLAN hotspot. No password is required and the valid time is 30 minutes.

figure 7-1 Enabling the WLAN Hotspot
Step 2 Connect the mobile phone to the WLAN network named as “SG-xxxxxxxxxxx” (xxxxxxxxxxx is the serial number indicated on the side of the communication module).
Step 3 Open the App to enter the login screen. Tap Local Access to enter the next screen.

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Step 4 Tap Confirm, then enter the password and tap LOGIN.Or tap MANUAL CONNECTION at the bottom of the interface and select WiNet-S/WiNet-S2, then enter the password and tap LOGIN.

· If the WiFi signal, serial number or inverter related data information cannot be found, unplug and reinsert the Winet-S/WiNet-S2 or press the multi- function button of the Winet-S/WiNet-S2 three times.
· The default account is “user” and the initial password is “pw1111” which should be changed for the consideration of account security. Tap “More” at the lower right corner on home page and choose “Change Password”.

figure 7-2 WLAN Local Access Step 5 If the inverter is not initialized, navigate to the quick setting screen to initialize the protection
parameters. For details, please refer to “Initial Settings”.
The “Country/Region” must be set to the country where the inverter is installed at. Otherwise, the inverter may report errors.

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figure 7-3 WLAN Local Access Step 6 After finishing the settings, tap TUNR ON DEVICE at the upper right corner and the device
will be initialized. The App will send start instructions and the device will start and operate. Step 7 After initialization settings, the App will return automatically to the home page.
– – End
7.5 Initial Settings
Tap Country/Region and select the country where the inverter is installed. For countries except Australia and Germany, the initialization is completed.

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The actual initializing procedure may differ due to different countries. Please follow the actual App guidance. For some countries, you should initialize parameters according to local grid requirements. For details, please refer to the relevant technical documents on http:// support.sungrowpower.com/.
7.6 Function Overview
The App provides parameter viewing and setting functions, as shown in the following figure.
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figure 7-4 App Function Tree Map
7.7 Home
Home page of the App is shown in the following figure.

figure 7-5 Home

table 7-1 Home Page Description

No.

Name

Description

1

Inverter state Present operation state of the inverter

Shows the PV power generation power, feed-in power, etc.

Energy flow

The line with an arrow indicates energy flow between con-

2

chart

nected devices, and the arrow pointing indicates energy flow

direction.

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No.

Name

Description

Real-time

3

power

Shows the present output power of the inverter.

4

Nominal power Shows the installed power of the inverter.

5

Today yield

Shows today power generation of the inverter

6

Total yield

Shows accumulative power generation of the inverter

7

Navigation bar Includes menus of “Home”, “Run Infomation”, “Records”

and “More”.

If the inverter runs abnormally, the fault icon will appear on the upper left corner of the screen. Users can tap the icon to view detailed fault information and corrective measures.

7.8 Run Information

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

table 7-2 Description of Run Information

Item PV information Inverter information Input
Output
Grid information

Description Shows voltage and current of every PV string. Shows basic information such as running state, on-grid running time, negative voltage to grid, bus voltage, internal air temperature, inverter efficiency, etc. Shows total DC power, voltage and current of MPPT1 and MPPT2. Shows daily/monthly/annual/total yield, total active/reactive/apparent power, total power factor, grid frequency, phase voltage and current. Shows daily/total feed-in energy, daily/total purchased energy.

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

figure 7-6 Records Chart Tap Chart to enter the screen showing daily power generation, as shown in the following figure.
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figure 7-7 Chart
The App displays power generation records in a variety of forms, including daily power generation graph, monthly power generation histogram, annual power generation histogram and total power generation histogram.

table 7-3 Description of Power Curve

Item Daily Month Year Total

Description Daily curve that indicates the real-time power. Monthly curve that indicates daily yield and equivalent hours in a month. Annual curve that indicates monthly yield and equivalent hours in a year. A curve that indicates annual yield and equivalent hours since installation.

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

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figure 7-8 Fault Alarm Record Click to select a time segment and view corresponding records. Select one of the records in the list and click the record, to view the detailed fault info as shown in following figure.
figure 7-9 Detailed Fault Alarm Information Event Record Tap Event Record to enter the screen, as shown in the following figure.
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figure 7-10 Event Record
Click to select a time segment and view corresponding records.
7.10 More
Tap More on the navigation bar to enter the corresponding screen, as shown in the following figure.

figure 7-11 More In addition to viewing the WLAN configuration and App software version, the More screen supports the following operations: · Set parameters including inverter system parameters, operation parameters, power reg-
ulation parameters and communication parameters. · Upgrade inverter firmware.
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7.10.1 System Parameters
Tap “SettingsSystem Parameters” to enter the corresponding interface, as shown in the following figure.

figure 7-12 System Parameters * The image shown here is for reference only. Boot/Shutdown Tap Boot/Shutdown to send the boot/shutdown instruction to the inverter. For Australia and New Zealand, when the DRM state is DRM0, the “Boot” option will be prohibited. Date Setting/Time Setting The correct system time is very important. Wrong system time will directly affect the data logging and power generation value. The clock is in 24-hour format. Software Version Version information of the current firmware.
7.10.2 Operation Parameters Running Time Tap “SettingsOperation ParametersRunning Time” to enter the corresponding screen, on which you can set the “Connecting Time” and “Reconnecting Time”.
figure 7-13 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 7-14 PID Setting

table 7-4 PID Parameter Description

Parameter PID Recovery
Clear PID alarm PID Scheme

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

· For the selection of negative or positive voltage, please consult the supplier of PV panels.
· After the PID night recovery function is enabled, the fault indicator on the inverter front panel turns green.
NS Protection(Passive Valid) Tap “SettingsOperation ParametersRegular Parameters” to enter the corresponding screen, on which you can set the “NS Protection(Passive Valid)”. When the NS Protection (Passive Valid) button is set to green, the Passive Valid mode is turned on. When the NS Protection(Passive Valid) button is set to gray, the Active Valid mode is turned on.

figure 7-15 NS Protection(Passive Valid) AFCI Parameters(Optional) Tap “SettingsOperation ParametersAFCI Parameters” to enter the corresponding screen, on which you can set “AFCI Parameters”.
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figure 7-16 AFCI Setting
7.10.3 Power Regulation Parameters Active Power Regulation Tap “SettingsPower Regulation ParametersActive Power Regulation” to enter the screen, as shown in the following figure.

figure 7-17 Active Power Regulation

table 7-5 Description of Active Power Regulation Parameters

Parameter Active Power Soft Start after Fault
Active Power Soft Start Time after Fault Active Power Gradient Control Active Power Decline Gradient Active Power Rising Gradient

Description Switch for activating/deactivating the function of active power soft start after a fault occurs The soft start time required for raising active power from 0 to rated value after a fault occurs Set whether to enable active power gradient control Decline gradient of inverter active power per minute Rising gradient of inverter active power per minute

Range On/Off 1 s­1200 s On/Off
1%/min­ 6000 %/min

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Parameter Active Power Setting Persistence Active Power Limit Active Power Limit Ratio
DRM

Description Switch for activating/deactivating the function of active power setting persistence Switch for limiting active power The ratio of active power limit to rated power in percentage Switch for activating/deactivating the DRM function

Range
On/Off
On/Off 0.0 %­ 110.0 % On/Off

Feed-in Limitation Tap “SettingsPower Regulation ParametersFeed-in Limitation” to enter the screen, as shown in the following figure.

figure 7-18 Feed-in Limitation

table 7-6 Description of Feed-in Limitation Parameters

Parameter Installed PV Power
Zero-export per Phase
Feed-in Limitation

Description
DC side power
For a three-phase inverter, the feed-in power of Phase A, Phase B, and Phase C are required shall be 0. This function has higher priority than Feed-in Limitation. If Zero-export per Phase is enabled, Feed-in Limitation is automatically disabled. It is supported to limit the feed-in power of the inverter

Range 3.00 kW­ 20.00 kW
On/Off
On/Off

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Parameter
Feed-in Limitation Value
Feed-in Limitation Ratio
Rated Power of Original Power Generation Systems

Description
Set Feed-in Limitation in numerical value (unit: kW)
Set Feed-in Limitation as a percentage. Feedin Limitation Ratio = Feed-in Value / Inverter Rated Voltage

Range Rated Power of Original Power Generation Systems (Rated Power of Original Power Generation Systems + Installed PV Power)
[Rated Power of Original Power Generation Systems / (Rated Power of Original Power Generation Systems + Installed PV Power)] *100%­ 100.00 %

Rated power of the existing inverter before in- 0.00 kW–

stalling the inverter

300.00 kW

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

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figure 7-19 Reactive Power Regulation

table 7-7 Description of Reactive Power Regulation Parameters

Parameter Reactive Power Setting Persistence Reactive Power Regulation Mode
Reactive Response
Reactive Response Time

Description Switch for activating/deactivating the function of reactive power setting persistence
Off/PF/Qt/Q(P)/Q(U)
Switch for activating/deactivating the function of reactive response

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

Time for reactive response

0.1 s-600 s

“Off” Mode The reactive power regulation function is disabled. The PF is fixed at +1.000. “PF” Mode The power factor (PF) is fixed and the reactive power is regulated by the parameter PF. The PF ranges from 0.8 leading to 0.8 lagging. This mode can be enabled only with a bus voltage of not less than 800V.

· Leading: the inverter is sourcing reactive power to the grid. · Lagging: the inverter is injecting reactive power into the grid.

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

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table 7-8 “Q(P)” Mode Parameters Explanation

Parameter

Explanation

Q(P) Curve

Select corresponding curve according to local regulations

QP_P1

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

QP_P2

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

QP_P3

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

QP_K1

Power factor at point P1 on the Q(P) mode curve

QP_K2

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

QP_K3

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

QP_ EnterVoltage

Voltage for Q(P) function activation (in %)

QP_ ExitVoltage

Voltage for Q(P) function deactivation (in %)

QP ExitPower
QP EnableMode

Power for Q(P) function deactivation (in %)
Unconditional activation/deactivation of Q(P) function

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

Range A, B, C*
0 %­100.0 %
20.0 %­100.0 %
20.0 %­100.0 %
Curve A/C: 0.800 to 1.000 Curve B: -0.600 to 0.600 100.0 %­110.0 % 90.0 %­100.0 %
1.0 %­100.0 %
Yes, No

figure 7-20 Reactive Power Regulation Curve in Q(P) Mode “Q(U)” Mode
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The reactive power output of the inverter varies in response to the grid voltage.

table 7-9 “Q(U)” Mode Parameter Explanation

Parameter Q(U) curve

Explanation
Select corresponding curve according to local regulations

Range A, B, C*

Hysteresis Ratio
QU_V1

Voltage hysteresis ratio on the Q(U) mode curve

0.0 %­5.0 %

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

(in %)

80.0 %­100.0 %

QU_V2

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

(in %)

80.0 %­100.0 %

QU_V3

Grid voltage limit at point P3 on the Q(U) mode curve 100.0 %­120.0

(in %)

%

QU_V4

Grid voltage limit at point P4 on the Q(U) mode curve 100.0 %­120.0

(in %)

%

QU_Q1

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

%)

-60.0 % to 0.0 %

QU_Q2

Value of Q/Sn at point P2 on the Q(U) mode curve (in -60.0 % to 60.0

%)

%

QU_Q3

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

%)

-60.0 % to 60 %

QU_Q4

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

%)

0.0 % to 60.0 %

QU EnterPower
QU ExitPower
QU_ EnableMode

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

20.0 %­100.0 %
1.0 %­20.0 % Yes, No, Yes (Limited by PF)

QU_Limited PF Value

Preset PF value

0­1.00

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

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figure 7-21 Reactive Power Regulation Curve in Q(U) Curve
7.10.4 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 7-22 Communication Parameters

7.10.5 Firmware Update

To avoid download failure due to poor on-site network signal, it is recommended to download the firmware package to the mobile device in advance.
Step 1 Enable the “Mobile data” of the mobile device.
Step 2 Open the App, enter the account and password on the login screen. Tap Login to enter the home screen.
Step 3 Tap “MoreFirmware Download” to enter corresponding screen on which you can view the device list.
Step 4 Select the device model before downloading the firmware. Tap the device name in the device

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

behind the firmware

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Step 5 Return to the Firmware Download screen, tap in the upper right corner of the screen to view the downloaded firmware upgrade package.
Step 6 Login the App via local access mode. Refer to “7.4 Login”.
Step 7 Tap More on the App home screen and then tap Firmware Update.
Step 8 Tap the upgrade package file, a prompt box will pop up asking you to upgrade the firmware with the file, tap CONFIRM to perform the firmware upgrade.

Step 9 Wait for the file to be uploaded. When the upgrade is finished, the interface will inform you of the upgrade completion. Tap Complete to end the upgrade.

– – End 7.10.6 Auto-test
Tap “Auto-test” to enter the corresponding screen, as shown in the following figure.
figure 7-23 Auto-test Launch Auto-test Tap Launch Auto-test carry out an auto- test. Auto-testing will take about 5 minutes. When the auto-test is completed, the auto-test report is displayed, as shown in the figure below. Tap DOWNLOAD to download the report.
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figure 7-24 Auto-test Result Clear Auto-test Fault Tap “Clear Auto-test FaultCONFIRM” to clear the auto-test fault.

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figure 7-25 Clear Auto-test Fault
7.10.7 SPI(for Italy CEI0-21 Grid Code Only) Contact your distributor to obtain the advanced account and corresponding password before setting the SPI parameters. If the distributor is unable to provide the required information, contact SUNGROW. Unauthorized personnel are not allowed to log in with this account. Otherwise, SUNGROW shall not be held liable for any damages caused.
Tap “MoreSettingsProtection ParametersOther Parameters” to enter the corresponding screen, on which you can modify the value of “External Signal for Italian Grid” ,”SPI Local Signal for Italian Grid”, “SPI Mode”, “Grid Voltage Adaption” and confirm the settings by enabling “External Grid Network Protection”.
figure 7-26 SPI
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System Decommissioning

8.1 Disconnecting Inverter
Danger of burns! Even if the inverter is shut down, it may still be hot and cause burns. Wear protective gloves before operating the inverter after it cools down.
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 prevent it from inadvertent reconnection. Step 2 Rotate the DC switch to the “OFF” position for disconnecting all of the PV string inputs. Step 3 Wait about 10 minutes until the capacitors inside the inverter completely discharge. Step 4 Ensure that the DC cable is current-free with a current clamp. – – End
8.2 Dismantling the Inverter
Risk of burn injuries and electric shock! After the inverter is powered off for 10 minutes, measure the voltage and current with professional instrument. Only when there is no voltage nor current can operators who wear protective equipment operate and maintain the inverter.
· Before dismantling the inverter, disconnect the inverter from both AC and DC power sources.
· If there are more than two layers of inverter DC terminals, dismantle the outer DC connectors before dismantling the inner ones.
· If the original packing materials are available, put the inverter inside them and then seal them using adhesive tape. If the original packing materials are not available, put the inverter inside a cardboard box suitable for the weight and size of this inverter and seal it properly.
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Step 1 Refer to “5 Electrical Connection”, for the inverter disconnection of all cables in reverse steps. In particular, when removing the DC connector, use an MC4 wrench to loosen the locking parts and install waterproof plugs.

Step 2 Refer to”4 Mechanical Mounting”, to dismantle the inverter in reverse steps. Step 3 If necessary, remove the wall-mounting bracket from the wall. Step 4 If the inverter will be used again in the future, please refer to “3.2 Inverter Storage” for a prop-
er conservation. – – End
8.3 Disposal of Inverter
Users take the responsibility for the disposal of the inverter.
Please scrap the inverter in accordance with relevant local regulations and standards to avoid property losses or casualties.
Some parts of the inverter may cause environmental pollution. Please dispose of them in accordance with the disposal regulations for electronic waste applicable at the installation site.

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Troubleshooting and Maintenance

9.1 Troubleshooting

Once the inverter fails, the fault information is 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, and only some of the faults may occur to the model you purchased. When a fault occurs, you can check the fault information according to the fault code on the mobile app.

Fault Code 2, 3, 14, 15
4, 5

Fault Name Grid Overvoltage
Grid Undervoltage

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 9
10
12
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Fault Name Grid Overfrequency Grid Underfrequency
Grid Power Outage
Excess Leakage Current
Grid Abnormal

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

1. Measure the actual grid, and contact the 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.

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Fault Code 17
28, 29, 208, 212, 448-479
532-547, 564579

Fault Name
Grid Voltage Imbalance
PV Reserve Connection Fault
PV Reverse Connection Alarm

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. If grid phase voltages differ greatly, contact the electric power company for solutions. 2. If the voltage difference between phases is within the permissible range of the local power company, modify the grid voltage imbalance parameter through the App or the LCD. 3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists. 1. Check whether the corresponding string is of reverse polarity. If so, disconnect the DC switch and adjust the polarity when the string current drops below 0.5 A. 2. Contact Sungrow Customer Service if the 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. 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 alarm persists. The code 532 to code 547 are corresponding to string 1 to string 16 respectively. The code 564 to code 579 are corresponding to string 17 to string 32 respectively.

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Fault Code 548-563, 580595
37 43

Fault Name
PV Abnormal Alarm
Excessively High Ambient Temperature
Excessively Low Ambient Temperature

Corrective Measures 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. 3. Check if the DC fuse is damaged. If so, replace the fuse. 4. Contact Sungrow Customer Service if the preceding causes are ruled out and the alarm persists. The code 548 to code 563 are corresponding to string 1 to string 16 respectively. The code 580 to code 595 are corresponding to string 17 to string 32 respectively. Generally, the inverter will resume operation when the internal or module temperature returns to normal. If the fault persists: 1. Check whether the ambient temperature of the inverter is too high; 2. Check whether the inverter is in a well-ventilated 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.

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Fault Code 39 106 88

Fault Name
Low System Insulation Resistance
Grounding Cable Fault
Electric Arc Fault

Corrective Measures 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. If there are batteries, check whether battery cables are damaged and whether terminals are loose or in poor contact. If so, replace the damaged cable and secure terminals to ensure a reliable connection.
5. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists. 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.

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Fault Code 84
514
323
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Fault Name Reverse Connection Alarm of the Meter/CT
Meter Communication Abnormal Alarm
Grid Confrontation
Inverter Parallel Communication Alarm

Corrective Measures 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 alarm persists. 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 alarm persists.

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Fault Code 7, 11, 16, 19­ 25, 30­34, 36, 38, 40­42, 44­ 50, 52­58, 60­ 69, 85, 87, 92, 93, 100­105, 107­114, 116­ 124, 200­211, 248­255, 300­ 322, 324­328, 401­412, 600­ 603, 605, 608, 612, 616, 620, 622­624, 800, 802, 804, 807, 1096­1122
59, 70­74, 76­ 83, 89, 216­ 218, 220­233, 432­434, 500­ 513, 515­518, 635­638, 900, 901, 910, 911, 996

Fault Name System Fault System Alarm

264-283

MPPT Reverse Connection

Corrective Measures

User Manual

1. Wait for the inverter to return to normal. 2. Disconnect the AC and DC switches, and disconnect the battery side switches if there are batteries. Close the AC and DC switches in turn 15 minutes later and restart the system. 3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.

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.
3. 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.

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Fault Code 332-363
364-395
1548-1579

9 Troubleshooting and Maintenance

Fault Name Boost Capacitor Overvoltage Alarm
Boost Capacitor Overvoltage Fault
String Current Reflux

Corrective Measures 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. 1. Disconnect the AC and DC switches, and disconnect the battery side switches if there are batteries. Close the AC and DC switches in turn 15 minutes later and restart the system.
2. If the fault persists, please contact Sungrow Power 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.

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Fault Code 1600 – 1615, 1632 – 1655
1616

Fault Name
PV Grounding Fault
System Hardware Fault

Corrective Measures 1. When the fault occurs, it is forbidden to directly disconnect the DC switch and unplug PV terminals when the direct current is greater than 0.5 A;
2. Wait until the direct current of the inverter falls below 0.5 A, then disconnect the DC switch and unplug the faulty strings;
3. Do not reinsert the faulty strings before the grounding fault is cleared;
4. If the fault is not caused by the foregoing reasons and still exists, contact Sungrow Customer Service. 1. It is prohibited to disconnect the DC switch when the DC current is greater than 0.5 A when t

References

• Homepage | Power Integrations
• support.sungrowpower.com
• support.sungrowpower.com/
• Contact Us - Sungrow

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