Huawei SUN2000 User Manual

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SUN2000-(100KTL, 110KTL, 125KTL) Series

User Manual

Issue

Preliminary Version 3.0

Date

2019-12-08

HUAWEI TECHNOLOGIES CO., LTD.

Issue Preliminary Version 3.0 (2019-12-08)

No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website:

https://e.huawei.com

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

About This Document

Issue Preliminary Version 3.0 (2019-12-08)

Overview

Symbol

Description

Indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury.

Indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury.

Indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation which, if not avoided, could result in equipment damage, data loss, performance deterioration, or unanticipated results.

NOTICE is used to address practices not related to personal injury.

Supplements the important information in the main text. NOTE is used to address information not related to personal injury,

equipment damage, and environment deterioration.

This document describes the SUN2000-125KTL-M0, SUN2000-110KTL-M0, SUN2000-100KTL-M0, SUN2000-100KTL-M1 and SUN2000-100KTL-INM0 (SUN2000 for short) in terms of installation, electrical connection, commissioning, maintenance, and troubleshooting. Before installing and operating the solar inverter, ensure that you are familiar with the features, functions, and safety precautions provided in this document.

Intended Audience

About This Document

This document is intended for photovoltaic (PV) plant operating personnel and qualified electricians.

Symbol Conventions

The symbols that may be found in this document are defined as follows.

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

About This Document

Issue Preliminary Version 3.0 (2019-12-08)

iii

Change History

Changes between document issues are cumulative. The latest document issue contains all the changes made in earlier issues.

Issue Preliminary Version 03 (2019-12-08)

Updated 3 Solar Inverter Storage. Updated 4.5 Installing a Solar Inverter. Updated 5.2 Preparing Cables. Updated 5.6 Connecting an AC Output Power Cable. Updated 5.7 Connecting DC Input Power Cables. Updated 5.8 Connecting the RS485 Communications Cable. Updated 7.1.1 App Introduction. Updated 8.2 Power-Off for Troubleshooting. Added 8.2 Power-Off for Troubleshooting. Updated 10 Technical Specifications. Added A Securing Y-Branch Connectors. Updated B Grid Code. Added C Domain Name List of Management Systems.

Issue 02 (2019-08-09)

Added the SUN2000-110KTL-M0, SUN2000-100KTL-M0, SUN2000-100KTL-M1, and SUN2000-100KTL-INM0 models.

Issue 01 (2019-05-15)

This issue is used for first office application (FOA).

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

Issue Preliminary Version 3.0 (2019-12-08)

Contents

About This Document .................................................................................................................... ii

1 Safety Information ........................................................................................................................ 1

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

1.2 Personnel Requirements ............................................................................................................................................... 2

1.3 Electrical Safety ............................................................................................................................................................ 3

1.4 Installation Environment Requirements ....................................................................................................................... 4

1.5 Mechanical Safety ........................................................................................................................................................ 4

1.6 Commissioning ............................................................................................................................................................. 5

1.7 Maintenance and Replacement ..................................................................................................................................... 5

2 Overview ......................................................................................................................................... 7

2.1 Product Model .............................................................................................................................................................. 7

2.2 Overview ...................................................................................................................................................................... 9

2.3 Label Description ........................................................................................................................................................ 11

2.4 Product Appearance .................................................................................................................................................... 13

2.4.1 Product Appearance ................................................................................................................................................. 13

2.4.2 Indicator Status ........................................................................................................................................................ 15

2.5 Working Principles...................................................................................................................................................... 17

2.5.1 Circuit Diagram ....................................................................................................................................................... 17

2.5.2 Working Modes ........................................................................................................................................................ 19

3 Solar Inverter Storage ................................................................................................................. 22

4 Installation.................................................................................................................................... 24

4.1 Check Before Installation ........................................................................................................................................... 24

4.2 Tools ........................................................................................................................................................................... 24

4.3 Determining the Installation Position ......................................................................................................................... 26

4.4 Installing the Mounting Bracket ................................................................................................................................. 30

4.4.1 Support-mounted Installation .................................................................................................................................. 31

4.4.2 Wall-mounted Installation ........................................................................................................................................ 32

4.5 Installing a Solar Inverter ........................................................................................................................................... 33

5 Electrical Connections ................................................................................................................ 38

5.1 Precautions .................................................................................................................................................................. 38

5.2 Preparing Cables ......................................................................................................................................................... 38

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Contents

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5.3 Connecting the PE Cable ............................................................................................................................................ 47

5.4 Opening the Maintenance Compartment Door ........................................................................................................... 48

5.5 (Optional) Installing the Power Cable of the Tracking System .................................................................................. 51

5.6 Connecting an AC Output Power Cable ..................................................................................................................... 52

5.7 Connecting DC Input Power Cables ........................................................................................................................... 57

5.8 Connecting the RS485 Communications Cable .......................................................................................................... 63

6 Commissioning............................................................................................................................ 65

6.1 Check Before Power-on .............................................................................................................................................. 65

6.2 Powering On the SUN2000 ........................................................................................................................................ 65

7 Man-Machine Interactions ........................................................................................................ 67

7.1 Operations with the SUN2000 App ............................................................................................................................ 67

7.1.1 App Introduction ...................................................................................................................................................... 67

7.1.2 Downloading and Installing the App ....................................................................................................................... 71

7.1.3 App Login ................................................................................................................................................................ 71

7.1.4 Operations Related to the Common User ................................................................................................................ 74

7.1.4.1 Setting User Parameters ........................................................................................................................................ 74

7.1.4.2 Starting and Shutting Down the SUN2000 ........................................................................................................... 75

7.1.5 Operations Related to the Advanced User ............................................................................................................... 75

7.1.5.1 Parameter Settings ................................................................................................................................................ 75

7.1.5.1.1 Setting Grid Parameters ..................................................................................................................................... 75

7.1.5.1.2 Setting Protection Parameters ............................................................................................................................ 76

7.1.5.1.3 Setting Feature Parameters ................................................................................................................................ 76

7.1.5.1.4 Setting User Parameters ..................................................................................................................................... 81

7.1.5.1.5 Setting the Grid-tied Control Parameters ........................................................................................................... 82

7.1.5.1.6 Setting Communications Parameters ................................................................................................................. 84

7.1.5.1.7 Setting the Tracking System .............................................................................................................................. 86

7.1.5.1.8 Setting a File Save Path ..................................................................................................................................... 88

7.1.5.1.9 Configuring a PV Plant ...................................................................................................................................... 88

7.1.5.2 System Maintenance ............................................................................................................................................. 91

7.1.5.2.1 Device inspection ............................................................................................................................................... 91

7.1.5.2.2 Managing the License ........................................................................................................................................ 91

7.1.5.2.3 Device management ........................................................................................................................................... 92

7.1.5.2.4 PV String Access Detection ............................................................................................................................... 93

7.1.5.2.5 Starting and Shutting Down the SUN2000 ........................................................................................................ 95

7.1.5.2.6 Restoring Factory Settings ................................................................................................................................. 95

7.1.5.2.7 Resetting the SUN2000 ..................................................................................................................................... 95

7.1.5.2.8 Resetting Alarms ................................................................................................................................................ 96

7.1.5.2.9 Clearing Historical Energy Yield Data............................................................................................................... 96

7.1.5.2.10 Importing and Exporting Configuration Files .................................................................................................. 96

7.1.5.3 Device upgrade ..................................................................................................................................................... 96

7.1.5.4 Device Logs .......................................................................................................................................................... 98

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

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7.1.6 Operations Related to the Special User.................................................................................................................... 98

7.1.6.1 Parameter Settings ................................................................................................................................................ 98

7.1.6.1.1 Setting Grid Parameters ..................................................................................................................................... 98

7.1.6.1.2 Setting Protection Parameters .......................................................................................................................... 100

7.1.6.1.3 Setting Feature Parameters .............................................................................................................................. 102

7.1.6.1.4 Setting the Grid-tied Control Parameters ......................................................................................................... 104

7.1.6.1.5 Setting Power Adjustment Parameters ............................................................................................................. 106

7.1.6.1.6 Setting Reactive Power Control ....................................................................................................................... 109

7.1.6.1.7 Setting User Parameters ................................................................................................................................... 109

7.1.6.1.8 Setting a File Save Path ................................................................................................................................... 110

7.1.6.2 System Maintenance ........................................................................................................................................... 110

7.1.6.2.1 Device management ................................................................ ................................................................ ......... 110

7.1.6.2.2 Starting and Shutting Down the SUN2000 ...................................................................................................... 111

7.1.6.2.3 Restoring Factory Settings ............................................................................................................................... 112

7.1.6.3 Device upgrade ................................................................................................................................................... 112

7.1.6.4 Device Logs ........................................................................................................................................................ 114

7.1.7 Querying the Status ................................................................................................................................................ 114

7.1.7.1 Querying Alarm Records .................................................................................................................................... 114

7.1.7.2 Querying SUN2000 Running Information .......................................................................................................... 115

7.1.7.3 Querying Energy Yield Data ............................................................................................................................... 117

7.1.7.4 Viewing System Version Information ................................................................................................................. 117

7.1.8 Tool Kit .................................................................................................................................................................. 118

7.1.8.1 Scanning SN Bar Codes ...................................................................................................................................... 118

7.1.8.2 SUN2000 Maintenance Script ............................................................................................................................ 120

7.1.8.3 File Manager ....................................................................................................................................................... 121

7.1.8.4 Changing the WLAN password .......................................................................................................................... 121

7.1.8.5 About .................................................................................................................................................................. 122

7.2 (Optional) Installing a Smart Dongle ........................................................................................................................ 122

7.3 Operations with a USB Flash Drive.......................................................................................................................... 123

7.3.1 Exporting Configurations ...................................................................................................................................... 123

7.3.2 Importing Configurations ...................................................................................................................................... 125

7.3.3 Exporting Data ....................................................................................................................................................... 126

7.3.4 Upgrading .............................................................................................................................................................. 127

8 Maintenance ............................................................................................................................... 129

8.1 Shutdown and Power-Off ......................................................................................................................................... 129

8.2 Power-Off for Troubleshooting ................................................................................................................................. 129

8.3 Routine Maintenance ................................................................................................ ................................ ................ 131

8.4 Troubleshooting ........................................................................................................................................................ 132

8.5 Replacing a Fan ........................................................................................................................................................ 140

9 Handling the Inverter ............................................................................................................... 145

9.1 Removing the SUN2000 ........................................................................................................................................... 145

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9.2 Packing the SUN2000 ............................................................................................................................................... 145

9.3 Disposing of the SUN2000 ................................................................................................................................ ....... 145

10 Technical Specifications ........................................................................................................ 146

A Securing Y-Branch Connectors .............................................................................................. 151

B Grid Code ................................................................................................................................... 154

C Domain Name List of Management Systems ..................................................................... 160

D DRM Configuration Guide for Standard As NZS4777.2 ................................................. 161

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

1 Safety Information

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1.1 General Safety

Statement

Before installing, operating, and maintaining the equipment, read this document and observe all the safety instructions on the equipment and in this document.

1 Safety Information

The "NOTICE", "CAUTION", "WARNING", and "DANGER" statements in this document do not cover all the safety instructions. They are only supplements to the safety instructions. Huawei will not be liable for any consequence caused by the violation of general safety requirements or design, production, and usage safety standards.

Ensure that the equipment is used in environments that meet its design specifications. Otherwise, the equipment may become faulty, and the resulting equipment malfunction, component damage, personal injuries, or property damage are not covered under the warranty.

Follow local laws and regulations when installing, operating, or maintaining the equipment. The safety instructions in this document are only supplements to local laws and regulations.

Huawei will not be liable for any consequences of the following circumstances:



Operation beyond the conditions specified in this document



Installation or use in environments which are not specified in relevant international or national standards



Unauthorized modifications to the product or software code or removal of the product



Failure to follow the operation instructions and safety precautions on the product and in this document



Equipment damage due to force majeure, such as earthquakes, fire, and storms



Damage caused during transportation by the customer



Storage conditions that do not meet the requirements specified in this document

General Requirements

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

1 Safety Information

Issue Preliminary Version 3.0 (2019-12-08)

Do not work with power on during installation.



Do not install, use, or operate outdoor equipment and cables (including but not limited to moving equipment, operating equipment and cables, inserting connectors to or removing connectors from signal ports connected to outdoor facilities, working at heights, and performing outdoor installation) in harsh weather conditions such as lightning, rain, snow, and level 6 or stronger wind.



After installing the equipment, remove idle packing materials such as cartons, foam, plastics, and cable ties from the equipment area.



In the case of a fire, immediately leave the building or the equipment area, and turn on the fire alarm bell or make an emergency call. Do not enter the building on fire in any case.



Do not scrawl, damage, or block any warning label on the equipment.



Tighten the screws using tools when installing the equipment.



Understand the components and functioning of a grid-tied PV power system and relevant local standards.



Repaint any paint scratches caused during equipment transportation or installation in a timely manner. Equipment with scratches cannot be exposed to an outdoor environment for a long period of time.



Do not open the host panel of the equipment.

Personal Safety



If there is a probability of personal injury or equipment damage during operations on the equipment, immediately stop the operations, report the case to the supervisor, and take feasible protective measures.



Use tools correctly to avoid hurting people or damaging the equipment.



Do not touch the energized equipment, as the enclosure is hot.

1.2 Personnel Requirements



Personnel who plan to install or maintain Huawei equipment must receive thorough training, understand all necessary safety precautions, and be able to correctly perform all operations.



Only qualified professionals or trained personnel are allowed to install, operate, and maintain the equipment.



Only qualified professionals are allowed to remove safety facilities and inspect the equipment.



Personnel who will operate the equipment, including operators, trained personnel, and professionals, should possess the local national required qualifications in special operations such as high-voltage operations, working at heights, and operations of special equipment.



Only professionals or authorized personnel are allowed to replace the equipment or components (including software).

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

1 Safety Information

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

Professionals: personnel who are trained or experienced in equipment operations and are clear of the sources and degree of various potential hazards in equipment installation, operation, and maintenance

Trained personnel: personnel who are technically trained, have required experience, are aware of possible hazards on themselves in certain operations, and are able to take protective measures to minimize the hazards on themselves and other people

Operators: operation personnel who may come in contact with the equipment, except trained personnel and professionals

1.3 Electrical Safety

Grounding



For the equipment that needs to be grounded, install the ground cable first when installing the equipment and remove the ground cable last when removing the equipment.



Do not damage the ground conductor.



Do not operate the equipment in the absence of a properly installed ground conductor.



Ensure that the equipment is connected permanently to the protective ground. Before operating the equipment, check its electrical connection to ensure that it is securely grounded.

General Requirements

Before connecting cables, ensure that the equipment is intact. Otherwise, electric shocks or fire may occur.



Ensure that all electrical connections comply with local electrical standards.



Obtain approval from the local electric utility company before using the equipment in grid-tied mode.



Ensure that the cables you prepared meet local regulations.



Use dedicated insulated tools when performing high-voltage operations.

AC and DC Power

Do not connect or disconnect power cables with power on. Transient contact between the core of the power cable and the conductor will generate electric arcs or sparks, which may cause fire or personal injury.



Before making electrical connections, switch off the disconnector on the upstream device to cut off the power supply if people may contact energized components.



Before connecting a power cable, check that the label on the power cable is correct.

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

1 Safety Information

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

If the equipment has multiple inputs, disconnect all the inputs before operating the equipment.

Cabling



When routing cables, ensure that a distance of at least 30 mm exists between the cables and heat-generating components or areas. This prevents damage to the insulation layer of the cables.



Bind cables of the same type together. When routing cables of different types, ensure that they are at least 30 mm away from each other.



Ensure that the cables used in a grid-tied PV power system are properly connected and insulated and meet specifications.

1.4 Installation Environment Requirements



Ensure that the equipment is installed in a well ventilated environment.



To prevent fire due to high temperature, ensure that the ventilation vents or heat dissipation system are not blocked when the equipment is running.



Do not expose the equipment to flammable or explosive gas or smoke. Do not perform any operation on the equipment in such environments.

1.5 Mechanical Safety

Using Ladders



Use wooden or fiberglass ladders when you need to perform live working at heights.



When a step ladder is used, ensure that the pull ropes are secured and the ladder is held firm.



Before using a ladder, check that it is intact and confirm its load bearing capacity. Do not overload it.



Ensure that the wider end of the ladder is at the bottom, or protective measures have been taken at the bottom to prevent the ladder from sliding.



Ensure that the ladder is securely positioned. The recommended angle for a ladder against the floor is 75 degrees, as shown in the following figure. An angle rule can be used to measure the angle.

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

1 Safety Information

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

When climbing a ladder, take the following precautions to reduce risks and ensure safety:



Keep your body steady.



Do not climb higher than the fourth rung of the ladder from the top.



Ensure that your body's center of gravity does not shift outside the legs of the ladder.

Drilling Holes



When drilling holes into a wall or floor, observe the following safety precautions: Wear goggles and protective gloves when drilling holes.



When drilling holes, protect the equipment from shavings. After drilling, clean up any shavings that have accumulated inside or outside the equipment.

Moving Heavy Objects



Be cautious to avoid injury when moving heavy objects.



When moving the equipment by hand, wear protective gloves to prevent injuries.

1.6 Commissioning

When the equipment is powered on for the first time, ensure that professional personnel set parameters correctly. Incorrect settings may result in inconsistency with local certification and affect the normal operation of the equipment.

1.7 Maintenance and Replacement

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

1 Safety Information

Issue Preliminary Version 3.0 (2019-12-08)

High voltage generated by the equipment during operation may cause an electric shock, which could result in death, serious injury, or serious property damage. Prior to maintenance, power off the equipment and strictly comply with the safety precautions in this document and relevant documents.



Maintain the equipment with sufficient knowledge of this document and using proper tools and testing equipment.



Before maintaining the equipment, power it off and follow the instructions on the delayed discharge label to ensure that the equipment is powered off.



Place temporary warning signs or erect fences to prevent unauthorized access to the maintenance site.



If the equipment is faulty, contact your dealer.



The equipment can be powered on only after all faults are rectified. Failing to do so may escalate faults or damage the equipment.

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

Issue Preliminary Version 3.0 (2019-12-08)

2.1 Product Model

No.

Description

Value

Series

SUN2000: grid-tied solar inverter

Model Description

2 Overview

The SUN2000-125KTL-M0, SUN2000-110KTL-M0, and SUN2000-100KTL-M0 are applicable only to the Chinese mainland. For other countries or regions, Huawei does not provide quality assurance.

This document covers the following product models:



SUN2000-125KTL-M0



SUN2000-110KTL-M0



SUN2000-100KTL-M0



SUN2000-100KTL-M1



SUN2000-100KTL-INM0

Figure 2-1 Model

Table 2-1 Model description

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

Issue Preliminary Version 3.0 (2019-12-08)

No.

Description

Value

Power  125K: The power level is 125 kW.



110K: The power level is 110 kW.



100K: The power level is 100 kW.

Topology

TL: transformerless

Region

IN: India

Design code

M0 and M1: product series with an input voltage level of 1100 V DC

(1) Position of the model label

Model Identification

You can obtain the solar inverter model from the model label on the external package and the nameplate on the side of the enclosure.

Figure 2-2 Position of the model label on the external package

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

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Figure 2-3 Nameplate

(1) Trademark and product model

(2) Key technical specifications

(3) Compliance symbols

(4) Company name and country of origin

The nameplate figure is for reference only.

2.2 Overview

Description

SUN2000 solar inverters are grid-tied PV string inverters that convert the DC power generated by PV strings into AC power and feed the power into the power grid.

Characteristics

Smart



Ten independent maximum power point tracking (MPPT) circuits and 20 PV string inputs. Flexible configuration of PV strings is supported.

Smart PV module self-learning: Automatically detects PV module failures, helping rectify faults. Optimizes the working mode to obtain the optimal working mode of the system.

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

Issue Preliminary Version 3.0 (2019-12-08)

Networking

(1) PV string

(2) SUN2000

(3) AC combiner box

(4) Transformer station

(5) Power grid



Smart air cooling: Adjusts the fan speed based on the ambient temperature and load to ensure the service life of fans and avoid frequent maintenance.



MBUS networking: Uses the existing power line for communication and does not require additional communications cable, which reduces the construction and maintenance costs and improves communication reliability and efficiency.



Smart I-V curve diagnosis: Implements I-V scanning and health diagnosis for PV strings. In this way, potential risks and faults can be detected in time, improving the plant operation & maintenance (O&M) quality.

Safe



Embedded DC and AC surge protection devices (SPDs): all-dimensional surge protection



Embedded residual current monitoring unit: Immediately disconnects from the power grid upon detecting that the residual current exceeds the threshold.

SUN2000 solar inverters apply to grid-tied systems of large-scale PV plants and commercial distributed grid-tied systems. Typically, a grid-tied PV system consists of the PV string, solar inverter, AC combiner box, and transformer station.

Figure 2-4 Networking

The SUN2000-125KTL-M0 is powered by a dedicated power transformer instead of connecting to low-voltage overhead power lines.

Supported Power Grids



SUN2000-110KTL-M0, SUN2000-100KTL-M0, SUN2000-100KTL-M1 and SUN2000-100KTL-INM0 solar inverters support the TN-S, TN-C, TN-C-S, TT, and IT power grids.



The SUN2000-125KTL-M0 supports only the IT power grid.

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

Issue Preliminary Version 3.0 (2019-12-08)

Figure 2-5 Supported Power Grids

Symbol

Name

Meaning

Running warning

Potential hazards exist after the inverter is powered on. Take protective measures when operating the inverter.

Burn warning

Do not touch a running inverter, as the shell becomes hot during operation.

Large current warning

Before powering on the inverter, ensure that the inverter is grounded because there is a large contact current after the inverter is powered on.

2.3 Label Description

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

Issue Preliminary Version 3.0 (2019-12-08)

Symbol

Name

Meaning

Delayed discharge



High voltage exists after the inverter is powered on. Only qualified and trained electrical technicians are allowed to perform operations on the inverter.



Residual voltage exists after the inverter is powered off. It takes 15 minutes for the inverter to discharge to the safe voltage.

Refer to documentation

Reminds operators to refer to the documents shipped with the inverter.

Grounding

Indicates the position for connecting the protective earthing (PE) cable.

Operation warning

Do not remove the DC input connector when the inverter is running.

Fan operation warning

High voltage exists after the inverter is powered on. Do not touch the fans when the inverter is working.

Fan replacement warning

Before replacing a fan, disconnect its power connectors.

Inverter ESN label

Indicates the inverter serial number.

Weight label

The inverter needs to be carried by four persons or using a pallet truck.

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

Issue Preliminary Version 3.0 (2019-12-08)

2.4 Product Appearance

(1) Panel

(2) LED indicators

(3) Maintenance compartment door

(4) Mounting bracket

(5) External fan tray

(6) DC input terminal group 1 (PV1–PV8, controlled by DC SWITCH 1)

(7) DC switch 1 (DC SWITCH

(8) DC input terminal group 2 (PV9–PV14, controlled by DC SWITCH 2)

(9) DC switch 2 (DC SWITCH

(10) DC input terminal group 3 (PV15–PV20, controlled by DC SWITCH 3)

(11) DC switch 3 (DC SWITCH 3)

(12) Ventilation valve (13) USB port (USB)

(14) Communications port (COM)

(15) Hole for the AC output power cable

(16) Hole for the tracking system power cable

2.4.1 Product Appearance

Appearance

Figure 2-6 Appearance

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

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Dimensions

(1) DC input terminals

(2) RS485 port

(3) Ground point on the enclosure

(4) AC terminal block (3-pin)

Wiring Area

Figure 2-7 Dimensions

Figure 2-8 Wiring port of a 3-pin model (SUN2000-125KTL-M0)

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

Issue Preliminary Version 3.0 (2019-12-08)

Figure 2-9 Wiring port of 4-pin models (SUN2000-110KTL-M0, SUN2000-100KTL-M0,

(1) DC input terminals

(2) RS485 port

(3) Ground point on the enclosure

(4) AC terminal block (4-pin)

No.

Indicator

Status (Blinking Fast: On for 0.2s and then Off for 0.2s; Blinking Slowly: On for 1s and then Off for 1s)

Description

PV connection indicator

Steady green

At least one PV string is properly connected, and the DC input voltage of the corresponding MPPT circuit is at least 200 V.

SUN2000-100KTL-M1, and SUN2000-100KTL-INM0)

2.4.2 Indicator Status

Figure 2-10 Indicator

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

Issue Preliminary Version 3.0 (2019-12-08)

No.

Indicator

Status (Blinking Fast: On for 0.2s and then Off for 0.2s; Blinking Slowly: On for 1s and then Off for 1s)

Description

Blinking green fast

If the alarm/maintenance indicator is red, an environmental fault at the DC side of the solar inverter is generated.

Off

The solar inverter disconnects from all PV strings, or the DC input voltage of all MPPT circuits is less than 200 V.

Grid connection indicator

Steady green

The solar inverter is in grid-tied mode.

Blinking green fast

If the alarm/maintenance indicator is red, an environmental fault (excluding Grid Loss) at the AC side of the solar inverter is generated.

Off

The solar inverter is not in grid-tied mode (due to reasons including Grid Loss).

Communications indicator

Blinking green fast

The solar inverter receives communication data normally.

Off

The solar inverter has not received communication data for 10 seconds.

Alarm/Maintenance indicator

Alarm status

Steady red

A major alarm is generated.



If the PV connection indicator or grid connection indicator is blinking green fast, troubleshoot DC or AC environmental faults as instructed by the SUN2000 app.



If the PV connection indicator and grid connection indicator are both not blinking green fast, replace components or the solar inverter as instructed by the SUN2000 app.

Blinking red fast

A minor alarm is generated.

Blinking red slowly

A warning alarm is generated.

Local maintenance status

Steady green

Local maintenance succeeds.

Blinking green fast

Local maintenance fails.

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

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No.

Indicator

Status (Blinking Fast: On for 0.2s and then Off for 0.2s; Blinking Slowly: On for 1s and then Off for 1s)

Description

Blinking green slowly

In local maintenance or shuts down over a command.



The PV connection indicator and the grid connection indicator preferentially indicate environmental faults.

Local maintenance refers to operations performed after a USB flash drive, a WLAN module, a Bluetooth module, or a USB data cable is inserted into the USB port of the solar inverter. For example, local maintenance includes data import and export using a USB flash drive, and connecting to the SUN2000 app over a WLAN module, a Bluetooth module, or a USB data cable.

If an alarm is generated during local maintenance, the alarm/maintenance indicator shows the local maintenance state first. After the USB flash drive, WLAN module, Bluetooth module, or USB data cable is removed, the indicator shows the alarm state.

2.5 Working Principles

2.5.1 Circuit Diagram

The solar inverter receives inputs from 20 PV strings. The inputs are grouped into 10 MPPT circuits inside the solar inverter to track the maximum power point of the PV strings. The DC power is then converted into three-phase AC power through an inverter circuit. Surge protection is supported on both the DC and AC sides.

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

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Figure 2-11 Schematic diagram of a 3-pin model

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

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Figure 2-12 Schematic diagram of 4-pin models

2.5.2 Working Modes

The SUN2000 can work in Standby, Operating, or Shutdown mode.

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

2 Overview

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Figure 2-13 Working modes

Working Mode

Description

Standby

The SUN2000 enters Standby mode when the external environment does not meet the operating requirements. In Standby mode:



The SUN2000 continuously performs status check and enters the Operating mode once the operating requirements are met.



The SUN2000 enters Shutdown mode after detecting a shutdown command or a fault after startup.

Operating

In Operating mode:



The SUN2000 converts DC power from PV strings into AC power and feeds the power to the power grid.



The SUN2000 tracks the maximum power point to maximize the PV string output.



If the SUN2000 detects a fault or a shutdown command, it enters the Shutdown mode.



The SUN2000 enters Standby mode after detecting that the PV string output power is not suitable for connecting to the power grid for generating power.

Table 2-2 Working mode description

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

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Working Mode

Description

Shutdown



In Standby or Operating mode, the SUN2000 enters Shutdown mode after detecting a fault or shutdown command.



In Shutdown mode, the SUN2000 enters Standby mode after detecting a startup command or that the fault is rectified.

SUN2000-(100KTL, 110KTL, 125KTL) Series User Manual

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3 Solar Inverter Storage

The following requirements should be met if the solar inverter is not put into use immediately:



Do not remove the packing materials, and check the packing materials regularly (recommended: every three months). If any rodent bites are found, replace the packing materials immediately. If the solar inverter is unpacked but not put into use immediately, put it inside the original package with the desiccant bag, and seal it using tape.



The ambient temperature and humidity should be suitable for the storage. The air must not contain corrosive or flammable gases.

Figure 3-1 Storage temperature and humidity



The solar inverter should be stored in a clean and dry place and be protected from dust and water vapor corrosion. The solar inverter must be protected against rain and water.



Do not tilt the package or place it upside down.



To avoid personal injury or device damage, stack inverters with caution to prevent them from falling over.

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Figure 3-2 Maximum number of pile-up layers allowed



If the solar inverter has been stored for more than two years, it must be checked and tested by professionals before being put into use.

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4.1 Check Before Installation

Category

Tool

Installation tools Hammer drill (with

Ф14 mm and Ф16 mm drill bits)

Socket wrench set

Torque wrench

Torque screwdriver (Phillips head: M3 and M4; flat head: M3 and M4)

Checking Outer Packing Materials

Before unpacking the solar inverter, check the outer packing materials for damage, such as holes and cracks, and check the solar inverter model. If any damage is found or the solar inverter model is not what you requested, do not unpack the package and contact your supplier as soon as possible.

4 Installation

You are advised to remove the packing materials within 24 hours before installing the solar inverter.

Checking Accessories

After unpacking the solar inverter, check that the components are intact and complete. If any damage is found or any component is missing, contact your dealer.

For details about the number of accessories delivered with the solar inverter, see the Packing List in the packing case.

4.2 Tools

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Category

Tool

Diagonal pliers

Wire strippers

Flat-head screwdriver (head: M3)

Rubber mallet

Utility knife

Cable cutter

Crimping tool (model: PV-CZM-22100)

RJ45 crimping tool

Open-end wrench (model: PV-MS)

Vacuum cleaner

Multimeter (DC voltage measurement range ≥ 1100 V DC)

Marker

Measuring tape

Bubble or digital level

Hydraulic pliers

Heat shrink tubing Heat gun

Cable tie

Scissors

N/A

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Category

Tool

Personal protective equipment (PPE)

Safety gloves

Safety goggles

Anti-dust respirator

Safety boots

4.3 Determining the Installation Position

Installation Environment Requirements



The solar inverter can be installed indoors or outdoors.



Do not install the solar inverter near flammable or explosive materials.



Do not install the solar inverter where its enclosure and heat sink are easily accessible, because the voltage is high and these parts are hot during operation.



Install the solar inverter in a well-ventilated environment for heat dissipation



When the solar inverter is installed under direct sunlight, the power may be derated due to the temperature rise. You are advised to install the solar inverter in a sheltered place or install an awning over it.



The SUN2000-125KTL-M0 should be physically separated from third-party wireless communication facilities and residential environments by distance greater than 30 m.

Figure 4-1 Installation environment

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Mounting Structure Requirements



The mounting structure where the solar inverter is installed must be fire resistant. Do not install the solar inverter on flammable building materials.



Ensure that the installation surface is solid enough to bear the solar inverter.



In residential areas, do not install the solar inverter on drywalls or walls made of similar materials with a weak sound insulation performance because the noise generated by the solar inverter may interfere with residents.

Figure 4-2 Mounting structure

Installation Angle Requirements

The solar inverter can be support-mounted or wall-mounted. The installation angle requirements are as follows:



Install the solar inverter vertically or at a maximum back tilt of 75 degrees to facilitate heat dissipation.



Do not install the solar inverter at forward tilted, excessive back tilted, side tilted, horizontal, or upside down positions.

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Figure 4-3 Angle

Installation Dimensions Requirements

Reserve enough space around the solar inverter for installation and heat dissipation.

Figure 4-4 Installation dimensions

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For ease of installing the solar inverter on the mounting bracket, connecting cables to the bottom of the solar inverter, and maintaining the solar inverter in future, it is recommended that the bottom clearance be between 600 mm and 730 mm. If you have any question about the clearance, consult the local technical support engineers.

When installing multiple solar inverters, install them in horizontal mode if sufficient space is available and install them in triangle mode if no sufficient space is available. Stacked installation is not recommended.

Figure 4-5 Horizontal installation mode (recommended)

Figure 4-6 Triangle installation mode (recommended)

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Figure 4-7 Stacked installation mode (not recommended)

(1) Security Torx wrench

4.4 Installing the Mounting Bracket

Before installing the mounting bracket, remove the security Torx wrench and keep it for later use.

Figure 4-8 Position for binding the security Torx wrench

The mounting bracket of the solar inverter has four groups of tapped holes, each group containing four tapped holes. Mark any hole in each group based on site requirements and mark four holes in total. The two round holes are recommended.

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Figure 4-9 Hole dimensions

4.4.1 Support-mounted Installation

Prerequisites

M12x40 bolt assemblies are supplied with the mounting bracket. If the bolt length does not meet the installation requirements, prepare M12 bolt assemblies by yourself and use them together with the supplied M12 nuts.

Procedure

Step 1 Determine the positions for drilling holes using the mounting bracket. Level the positions of

Step 2 Drill holes using a hammer drill. It is recommended that anti-rust measures be taken on the

Step 3 Secure the mounting bracket.

mounting holes using a bubble or digital level, and mark the positions with a marker.

positions for drilling holes.

Figure 4-10 Installing the mounting bracket

----End

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4.4.2 Wall-mounted Installation

Prerequisites

You have prepared expansion bolts. M12x60 stainless steel expansion bolts are recommended.

Procedure

Step 1 Determine the positions for drilling holes using the mounting bracket. Level the positions of

mounting holes using a bubble or digital level, and mark the positions with a marker.

Step 2 Drill holes using a hammer drill and install expansion bolts.

Avoid drilling holes in the position of the wall with water pipes and power cables buried inside.



To prevent dust inhalation or contact with eyes, wear safety goggles and an anti-dust respirator when drilling holes.



Clean up any dust in and around the holes using a vacuum cleaner and measure the distance between holes. If the holes are inaccurately positioned, drill a new set of holes.



Level the head of the expansion sleeve with the concrete wall after removing the bolt, spring washer, and flat washer. Otherwise, the mounting bracket will not be securely installed on the wall.

Step 3 Secure the mounting bracket.

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Figure 4-11 Installing the mounting bracket

----End

4.5 Installing a Solar Inverter

Context

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(A) Transportation scenario

(B) Installation scenario



Move the solar inverter with care to prevent device damage and personal injury.



It takes multiple persons or a pallet truck to move the solar inverter.



Do not use the ports and wiring terminals at the bottom to support any weight of the solar inverter.



When you need to temporally place the solar inverter on the ground, use foam, paper, or other protection material to prevent damage to its cover.



Use the handles to facilitate installation. Handles are optional and delivered separately. Ensure that the handles are securely installed. After the installation is complete, remove the handles and keep them properly.



To avoid damage to the equipment, do not lift or hoist a solar inverter with an improper hold as shown in Figure 4-13.

Figure 4-12 Positions for installing the handles

Procedure

Step 1 Lift the solar inverter from the packing case and move it to the installation position.

Figure 4-13 Lifting positions

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Figure 4-14 Taking out the solar inverter

Step 2 Lift the solar inverter and keep it upright.

Figure 4-15 Lifting the solar inverter and keeping it upright

Step 3 If the installation position is too high to install the solar inverter on the mounting bracket, run

a rope that is strong enough to bear the solar inverter through the two lifting eyes, and hoist the solar inverter.

Hoist the solar inverter with care to protect it from colliding with the wall or other objects.

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Figure 4-16 Hoisting the solar inverter

Step 4 Install the solar inverter on the mounting bracket and align the solar inverter enclosure with

the mounting bracket.

Figure 4-17 Mounting the solar inverter

Step 5 Secure the solar inverter.

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Precautions

Figure 4-18 Tightening security Torx screws

----End



If the equipment is installed in a public place or in an area of people activities, such as a parking lot, station, factory building, or residential area, install a protective net outside the equipment and erect a safety warning sign to isolate the equipment. The purpose is to avoid personal injury or property loss caused by contact with the equipment by nonprofessionals or other reasons during the operation of the equipment.



If the solar inverter has not been running for more than half a year after being mounted, it must be checked and tested by professionals before being put into operation.

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5.1 Precautions

After the PV array receives solar irradiance, it transmits the DC voltage to the solar inverter. Before connecting cables, ensure that the three DC switches on the solar inverter are set to OFF. Otherwise, the high voltage of the solar inverter may result in electric shocks.

5 Electrical Connections



The device damage caused by incorrect cable connections is beyond the warranty scope.



Only qualified technicians can perform operations about electrical connection.



Wear proper PPE at all time when connecting cables.



To prevent poor cable connection due to overstress, leave enough slack before connecting the cables to the appropriate ports.

The cable colors shown in the electrical connection diagrams provided in this chapter are for reference only. Select cables in accordance with local cable specifications (green-and-yellow cables are only used for protective earthing).

5.2 Preparing Cables

SUN2000 solar inverters support RS485 communication and MBUS communication.

The MBUS communication is applicable to medium-voltage grid connection scenarios and non-low-voltage public grid connection scenarios (industrial environment).

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(A) PV string

(B) SUN2000

(D) Transformer station

(E) Power grid

(F) SmartLogger

(G) Management system

In the networking diagram, indicates the power cable, indicates the power flow direction, and and indicate the signal flow.

Figure 5-1 RS485 networking (SmartLogger)

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Figure 5-2 RS485 networking (SDongle)

(A) PV string

(B) SUN2000

(D) Transformer station

(E) Power grid

(F) SDongle

(G) Management system

(A) PV string

(B) SUN2000

(D) Transformer station

(E) Power grid

(F) SmartLogger

Figure 5-3 MBUS networking (SmartLogger)

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(G) Management system

(A) PV string

(B) SUN2000

(D) Transformer station

(E) Power grid

(F) SDongle

(G) Management system

Figure 5-4 MBUS networking (SDongle)

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No.

Component

Description

Source

PV string



PV strings consist of PV modules in series.



A solar inverter supports 20 PV string inputs.

Prepared by the customer



To ensure the system response speed, it is recommended that less than 30 solar inverters be connected to each COM port on the SmartLogger and that less than 10 solar inverters be cascaded over the SDongle.



The RS485 communication distance between the last solar inverter and the SmartLogger cannot exceed 1000 m.

Figure 5-5 Cable connections (configure the components in the dotted box as required)

Table 5-1 Components

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No.

Component

Description

Source

Environmental monitoring instrument (EMI)



When the SmartLogger is used, the EMI can be directly connected to the SmartLogger or connected to the last solar inverter cascaded over RS485.



When the SDongle is used, the EMI is a cascaded device that needs to be connected to the solar inverter where the SDongle is installed.

Prepared by the customer

SmartLogger

The solar inverter communicates with the management system through the SmartLogger.

Purchased from Huawei

Power Meter

Implements power control at the grid-tied point in low voltage scenarios using a power meter.

Prepared by the customer

Support tracking system

Adjusts the angle of the supports.

Prepared by the customer

Fuse/Circuit breaker

The tracking system should be equipped with an overcurrent protection device or component. The power cable between the device or component and the wiring terminal should be no longer than 2.5 m.

Therefore, a fuse or a circuit breaker is recommended.



Installed between the solar inverter and tracking control box



Fuse specifications: rated voltage ≥ 500

V; rated current: 16 A; protection: gG



Circuit breaker specifications: rated

voltage ≥ 500 V; rated current: 16 A;

tripping: C

Prepared by the customer

AC switch



Installed in the AC combiner box



Recommended: a three-phase AC circuit breaker with a rated voltage greater than or equal to 500 V AC and a rated current of 250 A

Prepared by the customer

SDongle

The solar inverter communicates with the management system through the SDongle.

Purchased from Huawei

The solar inverter has an RCMU inside. Its external AC switch should be a three-phase circuit breaker or other AC load circuit breakers to safely disconnect the solar inverter from the power grid.

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Table 5-2 Cable description of a 3-pin model (S: cross-sectional area of the AC cable conductor; Sp: cross-sectional

No.

Cable

Category

Conductor Cross-Sectional Area Range

Outer Diameter

Source

DC input power cable

PV cable that meets the 1100 V standard

4–6 mm2

5.5–9 mm

Prepared by the customer

RS485 communications cable

Outdoor shielded twisted pair that meets the local standard

0.25–1 mm2



One or two communicat ions cables: 4–11 mm



Three communicat ions cables: 4–8 mm

Prepared by the customer

Protective earthing (PE) cable

Single-core outdoor copper cable and M10 OT/DT terminals

NOTICE

You are advised to choose the ground point on the enclosure. The ground point in the maintenance compartment is used for connecting to the PE cable contained in the multi-core AC power cable.

Sp ≥ S/2

N/A

Prepared by the customer

Tracking system power cable

Three-core outdoor copper cable with dual-layer protection

10 mm2

15–18 mm

Prepared by the customer

AC output power cable (multi-core)



If you connect a PE cable to the ground point on the enclosure, you are advised to use a three-core (L1, L2, and L3) outdoor cable and M12 OT/DT terminals (L1, L2, and L3).



If you connect a PE cable to the ground point in the maintenance compartment, you are advised to use a four-core (L1, L2, L3, and PE) outdoor cable, M12 OT/DT terminals (L1, L2, and L3), and M10 OT/DT terminals (PE). You do not need to prepare a PE cable.



Copper cable:

− S: 70–240

mm2

− S

≥ S/2



Aluminum alloy cable or copper-clad aluminum cable:

− S: 95–240

mm2

− S

≥ S/2

24–66 mm

Prepared by the customer

area of the protective earthing cable conductor)

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No.

Cable

Category

Conductor Cross-Sectional Area Range

Outer Diameter

Source

AC output power cable (single-core)

You are advised to use a single-core outdoor cable and M12 OT/DT terminals.



Copper cable:

− S: 70–240

mm2



Aluminum alloy cable or copper-clad aluminum cable:

− S: 95–240

mm2

14–32 mm

Prepared by the customer

The value of Sp is valid only if the conductors of the PE cable and AC power cable use the same material. If the materials are different, ensure that the conductor of the PE cable with a proper cross-sectional area produces a conductance equivalent to that of the cable specified in the table.

No.

Cable

Category

Conductor Cross-Sectional Area Range

Outer Diameter

Source

DC input power cable

PV cable that meets the 1100 V standard

4–6 mm2

5.5–9 mm

Prepared by the customer

RS485 communications cable

Outdoor shielded twisted pair that meets the local standard

0.25–1 mm2



One or two communicat ions cables: 4–11 mm



Three communicat ions cables: 4–8 mm

Prepared by the customer

PE cable

Single-core outdoor copper cable and M10 OT/DT terminals

NOTICE

You are advised to choose the ground point on the enclosure. The ground point in the maintenance compartment is used for connecting to the PE cable contained in the multi-core AC power cable.

Sp ≥ S/2

N/A

Prepared by the customer

Table 5-3 Cable description of 4-pin models (S: cross-sectional area of the AC cable conductor; Sp: cross-sectional area of the PE cable conductor)

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No.

Cable

Category

Conductor Cross-Sectional Area Range

Outer Diameter

Source

Tracking system power cable

Three-core outdoor copper cable with dual-layer protection

10 mm2

15–18 mm

Prepared by the customer

AC output power cable (multi-core)



If you connect a PE cable to the ground point on the enclosure and the neutral wire is not used, you are advised to use a three-core (L1, L2, and L3) outdoor cable and M12 OT/DT terminals (L1, L2, and L3).



If you connect a PE cable to the ground point in the maintenance compartment and the neutral wire is not used, you are advised to use a four-core (L1, L2, L3, and PE) outdoor cable, M12 OT/DT terminals (L1, L2, and L3), and M10 OT/DT terminals (PE).



If you connect a PE cable to the ground point on the enclosure and the neutral wire is used, you are advised to use a four-core (L1, L2, L3, and N) outdoor cable and M12 OT/DT terminals (L1, L2, L3, and N).



If you connect a PE cable to the ground point in the maintenance compartment and the neutral wire is used, you are advised to use a five-core (L1, L2, L3, N, and PE) outdoor cable, M12 OT/DT terminals (L1, L2, L3, and N), and M10 OT/DT terminals (PE).



Copper cable:

− S: 70–240

mm2

− S

≥ S/2



Aluminum alloy cable or copper-clad aluminum cable:

− S: 95–240

mm2

− S

≥ S/2

24–66 mm

Prepared by the customer

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No.

Cable

Category

Conductor Cross-Sectional Area Range

Outer Diameter

Source

AC output power cable (single-core)

You are advised to use a single-core outdoor cable and M12 OT/DT terminals.



Copper cable:

− S: 70–240

mm2



Aluminum alloy cable or copper-clad aluminum cable:

− S: 95–240

mm2

14–32 mm

Prepared by the customer

5.3 Connecting the PE Cable

Context



Proper grounding is helpful for resisting the impact of surge voltage and improving the electromagnetic interference (EMI) performance. Before connecting the AC power cable, DC power cables, and communications cable, connect the PE cable to the PE point.



It is recommended that the PE cable of the solar inverter be connected to a nearby ground point. Connect the PE points of all solar inverters in the same array to ensure equipotential connections to PE cables.

Procedure

Step 1 Connect the PE cable to the PE point.

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Figure 5-6 Connecting the PE cable to the PE point (on the enclosure)

(1) Reserved PE point

----End

Follow-up Procedure

To enhance the corrosion resistance of a ground terminal, apply silica gel or paint on it after connecting the PE cable.

5.4 Opening the Maintenance Compartment Door

Precautions



Do not open the panel cover of the solar inverter.



Before opening the maintenance compartment door, ensure that no electrical connections are made for the solar inverter on the AC or DC side.



If you need to open the maintenance compartment door in rainy or snowy days, take protective measures to prevent rain or snow from entering the maintenance compartment. If unavoidable, do not open the maintenance compartment door.



Do not leave unused screws in the maintenance compartment.

Procedure

Step 1 Open the maintenance compartment door and install the support bar.

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Figure 5-7 Opening the maintenance compartment door

Step 2 Remove the accessories and keep them properly.

Figure 5-8 Removing the accessories

Step 3 Select a crimping module according to the type of the AC output power cable.

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Figure 5-9 Select the crimping module

(A) Crimping module for multi-core cables of a 3-pin model

(B) Crimping module for single-core cables of a 3-pin model

(D) Crimping module for single-core cables of 4-pin models

----End

Follow-up Procedure

Use scissors to cut off the joints of the rubber rings to remove them. All rubber rings are removed in the same way.

Remove the corresponding rubber rings in strict accordance with the cable diameter, and ensure that the crimping module is not damaged. Otherwise the protection level of the solar inverter will be affected.

Figure 5-10 Remove the rubber ring

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5.5 (Optional) Installing the Power Cable of the Tracking System

Precautions



The tracking system obtains power from the AC three-phase power grid. The rated voltage of the power supply is the rated output voltage of the solar inverter.



Keep inflammable materials away from the power cable.



The power cable must be protected with a conduit to prevent short circuits caused by insulation layer damage.



Connect the power cable of the tracking system before the AC output power cable. Otherwise, reworking will be caused.

Procedure

Step 1 Prepare a cable. Step 2 Remove the corresponding rubber rings. Step 3 Connect the power cable of the tracking system.

Figure 5-11 Connecting the power cable of the tracking system

----End

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5.6 Connecting an AC Output Power Cable

(1) Power cable of the tracking system

(2) AC output power cable

Prerequisites



A three-phase AC switch should be installed on the AC side of the solar inverter. To ensure that the solar inverter can safely disconnect itself from the power grid when an exception occurs, select a proper overcurrent protection device in compliance with local power distribution regulations.



Connect the AC output power cable according to the requirements specified by local power grid operators.



Connect the power cable of the tracking system before the AC output power cable. Otherwise, reworking will be caused.

Figure 5-12 Cable connection sequence

Do not connect loads between the solar inverter and the AC switch.

Requirements for the OT/DT Terminal



If a copper cable is used, use copper wiring terminals.



If a copper-clad aluminum cable is used, use copper wiring terminals.



If an aluminum alloy cable is used, use copper-aluminum transition wiring terminals, or aluminum wiring terminals along with copper-aluminum transition spacers.

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

Do not connect aluminum wiring terminals to the AC terminal block. Otherwise the electrochemical corrosion will occur and affect the reliability of cable connections.



Comply with the IEC61238-1 requirements when using copper-aluminum transition wiring terminals, or aluminum wiring terminals along with copper-aluminum transition spacers.



If copper-aluminum transition spacers are used, pay attention to the front and rear sides. Ensure that the aluminum sides of spacers are in contact with aluminum wiring terminals, and copper sides of spacers are in contact with the AC terminal block.

Figure 5-13 Requirements for the OT/DT terminal

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Figure 5-14 AC terminal block dimensions of a 3-pin model

Figure 5-15 AC terminal block dimensions of 4-pin models

This section describes how to install an AC output power cable for the 3-pin model.

Procedure

Step 1 Prepare a cable. Step 2 Remove rubber rings according to the cable diameter range. Step 3 Secure the AC output power cable and PE cable. Step 4 Install the support bar. Step 5 Close the maintenance compartment door and tighten the two screws on the door.

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

Sufficient slack should be provided in the PE cable to ensure that the last cable bearing the force is the PE cable when the AC output power cable bears pulling force due to force majeure.



The cable outer diameter can be measured using the ruler sticker in the maintenance compartment.



Ensure that the cable jacket is in the maintenance compartment.



Ensure that the AC output power cable is secured. Failing to do so may cause the solar inverter to malfunction or damage to its terminal block by issues such as overheating.



Before closing the maintenance compartment door, check that the cables are connected correctly and securely, and clean up the foreign matter from the maintenance compartment.



If a screw on the maintenance compartment door is lost, obtain the spare screw from the fitting bag tied at the bottom of the maintenance compartment.

Figure 5-16 Multi-core cable connections

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Figure 5-17 Single-core cable connections

(A) Four-core cable

(B) Three-core cable

Figure 5-18 3-pin model (125KTL) cable connections

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Figure 5-19 4-pin model (100KTL/110KTL) cable connections

(A) Five-core cable

(B) Four-core cable (including the PE cable)

(D) Three-core cable

(E) Single-core cable (including the neutral wire)

(F) Single-core cable (excluding the neutral wire)

The cable colors shown in figures are for reference only. Select an appropriate cable according to the local standards.

----End

5.7 Connecting DC Input Power Cables

Precautions

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

Before connecting the DC input power cable, ensure that the DC voltage is within the safe range (lower than 60 V DC) and that the three DC switches on the solar inverter are set to OFF. Failing to do so may result in electric shocks.



If you turn a DC SWITCH to ON by mistake when connecting or disconnecting DC input power cables, do not remove or insert DC input terminals. If you need to remove or insert a DC input terminal, perform the operations provided in 8.2 Power-Off for

Troubleshooting.



When the solar inverter operates in grid-tied mode, do not perform maintenance or operations on the DC circuit, such as connecting or disconnecting a PV string or a PV module in the PV string. Failing to do so may cause electric shocks or arcing, which may also cause fire.

Ensure that the following conditions are met. Otherwise, the solar inverter may be damaged, or even a fire could happen.



The open-circuit voltage of each PV string must be 1100 V DC or lower under any circumstances.



The polarities of electric connections are correct on the DC input side. The positive and negative terminals of a PV module connect to corresponding positive and negative DC input terminals of the solar inverter.



Ensure that the PV module output is well insulated to ground.



The PV strings connecting to the same MPPT circuit should contain the same number of identical PV modules.



The solar inverter does not support full parallel connection for PV strings (full parallel connection: PV strings connect to one another in parallel outside the solar inverter and then connect to the solar inverter separately).



During the installation of PV strings and the solar inverter, the positive or negative terminals of PV strings may be short-circuited to ground if the power cable is not properly installed or routed. In this case, an AC or DC short circuit may occur and damage the solar inverter. The caused device damage is not covered under any warranty.

Terminal Description

The solar inverter has 20 DC input terminals. DC SWITCH 1 controls PV1–PV8 (MPPT1–MPPT4), DC SWITCH 2 controls PV9–PV14 (MPPT5–MPPT7), and DC SWITCH 3 controls PV15–PV20 (MPPT8–MPPT10).

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Figure 5-20 DC terminals

Number of PV Strings

Terminal Selection

Number of PV Strings

Terminal Selection

Any even-numbered route

PV2 and PV10

PV2, PV10, and PV18

PV2, PV6, PV10, and PV18

PV2, PV6, PV10, PV14, and PV18

PV2, PV4, PV6, PV10, PV14, and PV18

PV2, PV4, PV6, PV10, PV14, PV18, and PV20

PV2, PV4, PV6, PV8, PV10, PV14, PV18, and PV20

PV2, PV4, PV6, PV8, PV10, PV14, PV16, PV18, and PV20

PV2, PV4, PV6, PV8, PV10, PV12, PV14, PV16, PV18, and PV20

PV1, PV2, PV4, PV6, PV8, PV10, PV12, PV14, PV16, PV18, and PV20

PV1, PV2, PV4, PV6, PV8, PV10, PV12, PV14, PV16, and PV18–PV20

PV1–PV4, PV6, PV8, PV10, PV12, PV14, PV16, and PV18–PV20

PV1–PV4, PV6, PV8, PV10, PV12, PV14, and PV16–PV20

PV1–PV6, PV8, PV10, PV12, PV14, and PV16–PV20

PV1–PV6, PV8, PV10, PV12, and PV14–PV20

PV1–PV8, PV10, PV12, and PV14–PV20

PV1–PV8, PV10, and PV12–PV20

PV1–PV10 and PV12–PV20

N/A

When the DC input is not fully configured, the DC input terminals must meet the following requirements:

1. Evenly distribute the DC input power cables on the DC input terminals controlled by the

three DC switches. DC SWITCH 1 is preferred.

2. Maximize the number of connected MPPT circuits. For example, if the number of input routes is 1–19, the DC input terminals are selected as

follows.

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Wiring Description of Y-branch Connectors

Number of Y-branch Connector Sets

Recommended MPPT to Be Connected

Number of Y-branch Connector Sets

Recommended MPPT to Be Connected

MPPT9

MPPT7 and MPPT9

MPPT5, MPPT7 and MPPT9

MPPT5, MPPT7, MPPT9, and MPPT10



Y-branch connectors can be purchased from Huawei or the manufacturers based on the following recommended models: If the rated current of the fuse of the Y-branch connector is 15 A, the recommended model is 904095944 (Luxshare) or A040959443039 (Comlink); if the rated current of the fuse of the Y-branch connector is 20 A, the recommended model is 904095945 (Luxshare) or A040959453039 (Comlink).



Do not use Y-branch connectors that are not recommended.



When connecting cables to recommended Y-branch connectors, ensure that the connectors to be paired match each other and are from the same manufacturer. Otherwise, the contact resistance of the connectors may exceed the allowed value. In this case, the connectors may be heated and oxidized, which may cause faults.



When the Y-branch connector is used with the MC4 EVO2 contacts, you are advised to use the 32.6020-22100-HZ (Staubli) crimping tool. You can also use the PV-CZM-22100 (Staubli) crimping tool. When choosing PV-CZM-22100 (Staubli), do not use the locator. Otherwise, the metal contacts would be damaged.



Do not bind more than three fuse enclosures together. Otherwise, the fuses and their enclosures may be damaged due to overheating. It is recommended that a clearance of 10 mm or more be reserved between fuse enclosures. You are advised not to bind the fuse enclosures with other heat emitting conductors.



Do not place the Y-branch connector harness on the ground. A safe distance must be reserved between the Y-branch connector harness and the ground to avoid impact caused by water on the ground to the harness.



The DC input terminals of the solar inverter are prone to damage under stress. When Y-branch connectors are connected to the solar inverter, bind and secure the connectors to prevent the DC input terminals from bearing stress. For details, see A Securing Y-Branch

Connectors.

Cable connection rules:

1. A maximum of one set of Y-branch connectors can be used for each MPPT. Each solar

inverter can connect to a maximum of six sets of Y-branch connectors.

2. The PV+ on the solar inverter side must be connected to the PV+ on the PV string side,

and the PV– on the solar inverter side must be connected to the PV– on the PV string side.

3. Preferentially and evenly connect the Y-branch connectors to the MPPTs controlled by

DC SWITCH 2 or DC SWITCH 3.

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Number of Y-branch Connector Sets

Recommended MPPT to Be Connected

Number of Y-branch Connector Sets

Recommended MPPT to Be Connected

MPPT5, MPPT7, MPPT8, MPPT9, and MPPT10

MPPT5, MPPT6, MPPT7, MPPT8, MPPT9, and MPPT10

Figure 5-21 Connecting Y-branch connectors to the solar inverter

Figure 5-22 Connecting Y-branch connectors to the PV strings

Specification Requirements

Cables with high rigidity, such as armored cables, are not recommended, because poor contact may be caused by the bending of cables.

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Procedure

Step 1 Prepare the DC input power cables. Step 2 Crimp positive and negative metal contacts. Step 3 Insert the contacts into the corresponding positive and negative connectors. Step 4 Tighten the lock nuts on the positive and negative connectors. Step 5 Use a multimeter to measure the voltage between the positive and negative terminals of the

Use the Staubli MC4 connectors delivered with the solar inverter. If the PV connectors are lost or damaged, purchase the connectors of the same model. The device damage caused by incompatible PV connectors is beyond the warranty scope.

PV string (measurement range no less than 1100 V).



If the voltage is a negative value, the DC input polarity is incorrect and needs correction.



If the voltage is greater than 1100 V, too many PV modules configured to the same string. Remove some PV modules.

Step 6 Insert the positive and negative connectors into the corresponding DC positive and negative

input terminals of the solar inverter.

Figure 5-23 Connecting DC input power cables

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Port

Definition

Description

RS485-1

RS485A IN, RS485 differential signal+

RS485A OUT, RS485 differential signal+

Used for cascading solar inverters or connecting to devices such as the SmartLogger.

RS485B IN, RS485 differential signal–

RS485B OUT, RS485 differential signal–

Protection ground

PE, shielding ground

N/A

RS485-2

RS485A, RS485 differential signal+

RS485B, RS485 differential signal–

Used for connecting to an RS485 slave device.

If the DC input power cable is reversely connected and DC switches are set to ON, do not immediately turn off the DC switches or reconnect the positive and negative connectors. Otherwise, the device may be damaged. The caused device damage is not covered under any warranty. Wait until the solar irradiance declines at night and the PV string current reduces to below 0.5 A. Then, turn off the three DC switches, remove the positive and negative connectors, and rectify the connection of the DC input power cable.

----End

5.8 Connecting the RS485 Communications Cable

Pin Definitions of the Communications Port

Figure 5-24 Communications port

Connecting the RS485 Communications Cable

When routing the communications cable, separate it from power cables to prevent communication from being affected. Connect the shield layer to the PE point. This section describes how to connect three communications cables.

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Figure 5-25 Connecting RS485 communications cables (4–8 mm four-hole rubber plug)

Figure 5-26 Connecting RS485 communications cables (4–8 mm two-hole or three-hole rubber

plug)

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6.1 Check Before Power-on

No.

Acceptance Criteria

The solar inverter is installed correctly and securely.

The DC switches and the downstream AC switch are OFF.

All cables are connected correctly and securely.

Unused terminals and ports are locked by waterproof caps.

The installation space is proper, and the installation environment is clean and tidy.

The maintenance compartment door is closed and the door screws are tightened.

6 Commissioning

6.2 Powering On the SUN2000

Precautions

Before turning on the AC switch between the SUN2000 and the power grid, use a multimeter set to the AC position to check that the AC voltage is within the specified range.

Procedure

Step 1 Turn on the AC switch between the SUN2000 and the power grid.

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If you perform Step 2 before Step 1, the SUN2000 reports a fault about abnormal shutdown. You can start the SUN2000 only after the fault is automatically rectified.

Step 2 Set DC SWITCH 1 (MAIN SWITCH) at the bottom of the solar inverter chassis to ON. Step 3 Check the status of the PV connection indicator. If it is steady green, set DC SWITCH 2 and

DC SWITCH 3 to ON.

Step 4 Perform quick settings on the SUN2000 app. For details, see 7.1 Operations with the

SUN2000 App.

----End

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7.1 Operations with the SUN2000 App

7.1.1 App Introduction

Description

The SUN2000 app (app for short) is a mobile phone app that communicates with the solar inverter over a WLAN module, a Bluetooth module or a USB data cable to allow for querying alarms, setting parameters, and performing routine maintenance as an easy-to-use maintenance platform.

Connection Mode

After the DC or AC side of the solar inverter is powered on, the app can connect to it either over a WLAN module, a Bluetooth module or a USB data cable.

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(A) Solar inverter

(B) WLAN module or Bluetooth module

(A) Solar inverter

(B) USB data cable



Over a WLAN module: The USB-Adapter2000-C WLAN module is supported.



Over a Bluetooth module: The USB-Adapter2000-B Bluetooth module is supported.



Over a USB data cable: The USB 2.0 port is supported. Use the USB data cable delivered with the mobile phone.



Requirements for the mobile phone operating system: Android 4.0 or later.



Recommended phone brands: Huawei, Samsung.

Figure 7-1 Connection over a WLAN module or a Bluetooth module (Android)

Statement

Figure 7-2 Connection over a USB data cable (Android)

The app snapshots provided in this document correspond to the SUN2000 app 3.2.00.001 (this app is available only on Android phones currently). The snapshots are for reference only.

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

The configurable parameters of the solar inverter vary with the device model and grid code.



Changing the grid code may restore some parameters to factory defaults. Check whether the previously set parameters are affected.



The parameter names, value ranges, and default values are subject to change.



Delivering a reset, factory reset, shutdown, or upgrade command to the solar inverters may cause power grid connection failure, which affects the energy yield.



Only professionals are allowed to set the grid parameters, protection parameters, feature parameters, power adjustment parameters, and grid-tied point control parameters of the solar inverters. If the grid parameters, protection parameters, and feature parameters are incorrectly set, the solar inverters may not connect to the power grid. If the power adjustment parameters and grid-tied point control parameters are incorrectly set, the solar inverters may not connect to the power grid as required. In these cases, the energy yield will be affected.

User Operation Permissions

The user accounts that can log in to the app are classified into common users, special users, and advanced users based on the responsibilities of PV plant operation personnel.



Common user: Has the permission of viewing data and setting user parameters.



Advanced user: Has the permission of viewing data, setting functional parameters, and maintaining devices.



Special user: Has the permissions of viewing solar inverter data, setting grid related parameters, and maintaining devices (including starting and shutting down the solar inverter, restoring factory defaults, and upgrading devices).

File save path is displayed only on the Android app.

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Figure 7-3 Operation permissions of common users

Figure 7-4 Operation permissions of advanced users

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Figure 7-5 Operation permissions of special users

7.1.2 Downloading and Installing the App

Access Huawei application store (https://appstore.huawei.com), search for SUN2000, and download the app installation package.

After the app is installed, the SUN2000 symbol will be displayed as below:

7.1.3 App Login

Prerequisites



The DC or AC side of the solar inverter has been energized.



Connection over a WLAN module or a Bluetooth module: a. The WLAN module or Bluetooth module is connected to the USB port at the

bottom of the solar inverter.

b. The WLAN or Bluetooth function is enabled. c. Keep the mobile phone within 5 m from the solar inverter. Otherwise, the

communication between them would be affected.



Connection over a USB cable: a. The USB data cable is connected from the USB port at the bottom of the solar

inverter to the USB port on the mobile phone.

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Procedure

Step 1 Start the app. The login screen is displayed. Select Connection Mode to connect to the solar

b. The USB data cable has been successfully connected and Connected to USB

Accessory is displayed on the screen. Otherwise, the connection is invalid.

inverter.



When the WLAN connection is used, the initial name of the WLAN network is Adapter-WLAN module SN, and the initial password is Changeme. Use the initial password upon first power-on

and change it immediately after login. To ensure account security, change the password periodically and keep the new password in mind. Not changing the initial password may cause password disclosure. A password left unchanged for a long period of time may be stolen or cracked. If a password is lost, devices cannot be accessed. In these cases, the user is liable for any loss caused to the PV plant.

When the Bluetooth connection is used, the name of the connected Bluetooth device is the last eight digits of the SN bar code+HWAPP.

When the USB connection is used, after you select Use by default for this USB accessory, the message prompting you to confirm that the app is allowed to access the USB device will not appear if you log in to the app again without removing the USB data cable.

Step 2 Select a login user and enter the password.



The login password is the same as that for the solar inverter connected to the app and is used only when the solar inverter connects to the app.



The initial passwords for Common User, Advanced User, and Special User are both 00000a.



Use the initial password upon first power-on and change it immediately after login. To ensure account security, change the password periodically and keep the new password in mind. Not changing the initial password may cause password disclosure. A password left unchanged for a long period of time may be stolen or cracked. If a password is lost, devices cannot be accessed. In these cases, the user is liable for any loss caused to the PV plant.



During the login, if five consecutive invalid password entries are made (the interval between two consecutive entries is less than 2 minutes), the account will be locked for 10 minutes. The password should consist of six characters.

Step 3 After successful login, the quick settings or main menu screen is displayed.

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Parameter

Description

Value Range

Grid code

Set this parameter based on the grid code of the country or region where the SUN2000 is used and the SUN2000 application scenario.

N/A

Date

Specifies the system date.

[2000-01-01, 2068-12-31]

Time

Specifies the system time.

[00:00:00, 23:59:59]

Baud rate (bps)

Set the RS485 baud rate to be consistent with the baud rate of the devices on the same bus.



4800



9600



19200

RS485 protocol



The solar inverter can connect to the upper-layer management unit over the Modbus RTU, SunSpec, or AVM protocol.



When the solar inverter connects to the support tracking system, only the Modbus RTU protocol is supported.



MODBUS RTU



Sunspec



AVM



If you log in to the SUN2000 app after the device connects to the app for the first time or factory defaults are restored, the Quick Settings screen will be displayed. If you do not set the basic parameters for the solar inverter on the Quick Settings screen, the screen is still displayed when you log in next time.



To set the basic parameters on the Quick Settings screen, switch to Advanced User. When you log in as Common User or Special User, enter the password of Advanced

User in the dialog box that is displayed. After you confirm the password, go to the Quick Settings screen.

Figure 7-6 App login

Table 7-1 Quick settings

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Parameter

Description

Value Range

Com address

Set the communications address of the SUN2000 when it connects to the upper-level management unit, which should not conflict with the addresses of other devices on the same bus.

[1, 247]

Item

Description

Value Range

Date

Set the system date.

[2000-01-01, 2068-12-31]

Time

Set the system time.

[00:00:00, 23:59:59]

User password

Set the login password.



Contains six characters.



Contains at least two types of lowercase letters, uppercase letters, and digits.

----End

7.1.4 Operations Related to the Common User

7.1.4.1 Setting User Parameters

Procedure

Step 1 Choose Function Menu > Settings > User Param. to set user parameters.

Figure 7-7 Setting user parameters

Table 7-2 User parameters

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Item

Description

Value Range

Currency

Set the SUN2000 revenue currency.



EUR



GBP



USD



CNY



JPY

Electricity price/kWh

Set the SUN2000 revenue per kWh. The revenue/kWh indicates the local electricity

price, which is used to calculate the conversion revenue of the energy yield.

[0, 999.999]

----End

7.1.4.2 Starting and Shutting Down the SUN2000

Procedure

Step 1 Choose Function Menu > Maintenance. The maintenance screen will be displayed.

Step 2 Tap behind Power on or Power off, enter the login password, and tap OK.

----End

7.1.5 Operations Related to the Advanced User

7.1.5.1 Parameter Settings

Ensure that the DC side of the SUN2000 is energized before setting grid parameters, protection parameters, and feature parameters.

7.1.5.1.1 Setting Grid Parameters

Procedure

Step 1 Choose Function Menu > Settings > Grid Parameters to set grid parameters.

Figure 7-8 Grid parameters

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Table 7-3 Grid parameters

Parameter

Description

Value Range

Grid code

Set this parameter based on the grid code of the country or region where the SUN2000 is used and the SUN2000 application scenario.

N/A

Isolation

Specifies the working mode of the SUN2000 according to the grounding status at the DC side and the connection status to the grid.



Input ungrounded, without TF



Input ungrounded, with TF

Parameter

Description

Value Range

Insulation resistance protection (MΩ)

To ensure device safety, the SUN2000 detects the insulation resistance between the input side and the ground when it starts a self-check. If the detected value is less than the preset value, the SUN2000 does not export power to the power grid.

[0.037, 1.5]

----End

7.1.5.1.2 Setting Protection Parameters

Procedure

Step 1 Choose Function Menu > Settings > Protection Parameters to set protection parameters.

Figure 7-9 Protection parameters

Table 7-4 Protection parameters

----End

7.1.5.1.3 Setting Feature Parameters

Procedure

Step 1 Choose Function Menu > Settings > Feature Parameters, and set feature parameters.

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Figure 7-10 Feature parameters

Parameter

Description

Value Range

MPPT multi-peak scanning

When the SUN2000 is used in scenarios where PV strings are obviously shaded, enable this function. Then the SUN2000 will perform MPPT scanning at regular intervals to locate the maximum power.

The scanning interval is set by MPPT multi-peak scanning interval.



Disable



Enable

MPPT multi-peak scanning interval (min)

Specifies the MPPT multi-peak scanning interval.

This parameter is displayed only when MPPT multi-peak scanning is set to Enable.

[5, 30]

RCD enhancing

RCD refers to the residual current of the SUN2000 to the ground. To ensure device security and personal safety, RCD should comply with the standard. If an AC switch with a residual current detection function is installed outside the SUN2000, this function should be enabled to reduce the residual current generated during SUN2000 running, thereby preventing the AC switch from misoperations.



Disable



Enable

Table 7-5 Feature parameters

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Parameter

Description

Value Range

Reactive power output at night

In some specific application scenarios, a power grid company requires that the SUN2000 can perform reactive power compensation at night to ensure that the power factor of the local power grid meets requirements.

This parameter is configurable only when

Isolation is set to Input ungrounded, with a transformer.



Disable



Enable

PID protection at night



When PID protection at night is set to Enable, the solar inverter will shut down

automatically if it detects abnormality of the voltage compensation of the anti-PID module during the reactive power compensation at night.



When PID protection at night is set to Disable, the solar inverter will operate in

grid-tied mode if it detects abnormality of the voltage compensation of the anti-PID module during the reactive power compensation at night.



Disable



Enable

Power quality optimization mode

If Power quality optimization mode is set to Enable, the inverter output current harmonics will be optimized.



Disable



Enable

PV module type

This parameter is used to set different types of PV modules and the shutdown time of the concentration PV module. If the concentration PV modules are shaded, the power drops drastically to 0 and the solar inverter shuts down. The energy yield would be affected since it takes too long for the power to resume and solar inverter to restart. The parameter does not need to be set for crystalline silicon and filmy PV modules.



When PV module type is set to Crystalline silicon or Film, the solar inverter

automatically detects the PV module power when the PV module is shaded. If the power is insufficient, the solar inverter shuts down automatically.



When concentration PV modules are used:

− When PV module type is set to CPV 1,

the solar inverter can quickly restart in 60 minutes if the input power of PV modules drops drastically due to shading.

− When PV module type is set to CPV 2,

the solar inverter can quickly restart in 10 minutes if the input power of PV modules drops drastically due to shading.



Crystalline silicon



Film



CPV 1



CPV 2

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Parameter

Description

Value Range

PID compensation direction

When the solar inverter generates reactive power at night, an external PID compensation device (such as the anti-PID module) is required to perform PID compensation for the system. In addition, this parameter must be correctly set for the solar inverter.

The solar inverter can generate reactive power at night only when it detects that the value of this parameter is the same as the compensation direction of the external PID compensation device.



If no PID compensation device exists in the system, set this parameter to Output disabled.



When the system uses the PID compensation device to increase the voltage of PV– with respect to ground to a value greater than 0 V, set this parameter to PV- positive offset.



When the system uses the PID compensation device to decrease the voltage of PV+ with respect to ground to a value less than 0 V, set this parameter to PV+ positive offset.



Output disabled



PV- positive offset



PV+ negative offset

String connection mode

Specifies the connection mode of PV strings.



When PV strings connect to the solar inverter separately (fully separate connection), you do not need to set this parameter. The solar inverter can automatically detect the connection mode of the PV strings.



When PV strings connect to one another in parallel outside the solar inverter and then connect to it independently (fully parallel connection), set this parameter to All PV strings connected.



Automatic detection



All PV strings separated



All PV strings connected

Communication interrupt shutdown

The standards of certain countries and regions require that the SUN2000 must shut down after the communication is interrupted for a certain time.

If Communication interrupt shutdown is set to Enable and the SUN2000 communication has been interrupted for a specified time (set by Communication interruption duration), the SUN2000 will automatically shut down.



Disable



Enable

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Parameter

Description

Value Range

Communication resumed startup

If this parameter is enabled, the SUN2000 automatically starts after communication recovers. If this parameter is disabled, the SUN2000 needs to be started manually after communication recovers.

This parameter is displayed when

Communication interrupt shutdown is set to Enable.



Disable



Enable

Communication interruption duration (min)

Specifies the duration for determining communication interruption, and is used for automatic shutdown for protection in case of communication interruption.

[1, 120]

Soft start time (s)

Specifies the duration for the power to gradually increase when the SUN2000 starts.

[1, 1800]

Hibernate at night

The SUN2000 monitors PV strings at night. If Hibernate at night is set to Enable, the monitoring function of the SUN2000 will hibernate at night, reducing power consumption.



Disable



Enable

MBUS communication

For solar inverters that support RS485 communication and MBUS communication, you are advised to set this parameter to Disable to reduce power consumption.



Disable



Enable

Upgrade delay

Upgrade delay is mainly used in the upgrade scenarios where the PV power supply is disconnected at night due to no sunlight or unstable at dawn or dusk due to poor sunlight.

After the solar inverter starts to upgrade, when Upgrade delay is set to Enable, the upgrade package is loaded first. After the PV power supply resumes and the activation conditions are met, the solar inverter automatically activates the upgrade.



Disable



Enable

RS485-2 communication

If this parameter is set to Enable, the RS485-2 port can be used. If the port is not used, you are advised to set this parameter to Disable to reduce power consumption.



Disable



Enable

Tracking system controller

Selects a controller vendor.

N/A

Duration for determining short-time grid disconnection (ms)

The standards of certain countries and regions require that the inverter should not disconnect from the power grid if the power grid experiences a short-time failure. After the fault is rectified, the inverter output power needs to be quickly restored.

[500, 20000]

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----End

Item

Description

Value Range

Date

Set the system date.

[2000-01-01, 2068-12-31]

Time

Set the system time.

[00:00:00, 23:59:59]

User password

Set the login password.



Contains six characters.



Contains at least two types of lowercase letters, uppercase letters, and digits.

Currency

Set the SUN2000 revenue currency.



EUR



GBP



USD



CNY



JPY

Electricity price/kWh

Set the SUN2000 revenue per kWh. The revenue/kWh indicates the local electricity

price, which is used to calculate the conversion revenue of the energy yield.

[0, 999.999]

7.1.5.1.4 Setting User Parameters

Procedure

Step 1 Choose Function Menu > Settings > User Param. to set user parameters.

Figure 7-11 Setting user parameters

Table 7-6 User parameters

----End

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7.1.5.1.5 Setting the Grid-tied Control Parameters

Parameter

Description

Value Range

Active power control mode

Specifies the active power output mode at the grid-tied point.



No limit



Grid connection with zero power



Grid connection with limited power (kW)



Grid connection with limited power (%)

Closed-loop controller

Specifies the grid-tied power controller. Before setting the parameter, confirm the controller type. Incorrect setting will result in abnormal power output of the solar inverter. Solar inverter applies only to the scenario where a single solar inverter is used or where a single inverter is used with a Smart Dongle.



SDongle/SmartLogger



Solar inverter

Limitation mode

Specifies the active power limitation mode as required by the power grid.



Total power



Single phase power

PV plant capacity (kW)

Specifies the PV array capacity.

[0, 2000]

Maximum grid feed-in power (kW)

In Grid connection with limited power (kW) mode, set the maximum power fed to the power grid from the PV array.

[–1000, PV plant capacity]

Prerequisites

After the Smart Power Sensor is connected to the solar inverter through Function Menu > Maintenance > Device Mgmt, you can set the grid-tied control parameters to control the

active and reactive power output of the grid-tied point.

Procedure

Step 1 Choose Function Menu > Settings > Grid-tied Point Control, enter the login password, and

set the corresponding power control parameters based on the PV plant requirements.

Figure 7-12 Grid-tied point control

Table 7-7 Grid-tied control parameters

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Parameter

Description

Value Range

Maximum grid feed-in power (%)

In Grid connection with limited power (%) mode, set the proportion of the maximum power fed to the power grid from the PV array to the capacity of the PV plant.

[0, 100]

Power lowering adjustment period (s)

Specifies the interval for sending adjustment commands.

[0.2, 300]

Maximum protection time (s)

Specifies the protection duration to determine whether the communication between the SDongle/SmartLogger and the Smart Power Sensor is interrupted.

[0.2, 300]

Power raising threshold (kW)

Specifies the threshold for power raising.

[0, 50]

Fail-safe power (%)

When the communication between the SDongle/SmartLogger as well as the Smart Power Sensor and the solar inverter is interrupted, the solar inverter generates power based on this threshold.

[0, 100]

Reactive power control mode

Specifies the reactive power output mode at the grid-tied point.



No output



Pwr factor closed-loop control

Power factor

Specifies the target value for the power factor of the Smart Power Sensor.

(–1, –0.8] U [0.8, 1]

Adjustment period (s)

Specifies the interval for sending adjustment commands.

[0.2, 10]

Adjustment deadband

Specifies the adjustment power factor precision.

[0.001, 1]

Fail-safe power factor

When the communication between the Smart Dongle as well as the Smart Power Sensor and solar inverter is interrupted, the solar inverter generates power based on this threshold.

(–1, –0.8] U [0.8, 1]

Communication disconnection fail-safe

When this parameter is set to Enable, and the communication between the solar inverter and the SDongle/SmartLogger is interrupted for a certain period (set by Communication disconnection detection time), the solar inverter generates power based on Fail-safe power.



Disable



Enable

Communication disconnection detection time (s)

Specifies the protection duration to determine whether the communication between the SDongle/SmartLogger and the solar inverter is interrupted.

[1, 10]

----End

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7.1.5.1.6 Setting Communications Parameters

Parameter

Description

Value Range

Baud rate (bps)

Set the RS485 baud rate to that of the devices on the same bus.



4800



9600



19200

RS485 protocol



The solar inverter can connect to the upper-layer management unit over the Modbus RTU, SunSpec, or AVM protocol.



When the solar inverter connects to the support tracking system, only the Modbus RTU protocol is supported.



MODBUS RTU



Sunspec



AVM

Parity

Set the parity of RS485 communication to that of the devices on the same bus.



None



Odd parity



Even parity

Com address

Set the communications address of the solar inverter when it connects to the upper-layer management unit. The address should not conflict with the addresses of other devices on the same bus.

[1, 247]

Procedure

Step 1 Choose Function Menu > Settings > Comm. Param., and set communication parameters

based on the communication mode used by the solar inverter.

Figure 7-13 Communications parameters



Set RS485 communications parameters when the solar inverters are cascaded using an RS485 communications cable or connect to a slave RS485 device.

Table 7-8 RS485 communications parameters

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Parameter

Description

Value Range

Port mode

Specifies the RS485 port mode. You are advised to retain the default value. The port mode is automatically matched based on the device connected.



Slave mode



Host mode

Parameter

Description

Value Range

MBUS protocol

Specifies the MBUS communication protocol.



MODBUS RTU



Sunspec

Box-type transformer No.

Specifies the number of the transformer station connecting to the solar inverter.

[0, 511]

Winding No.

Specifies the number of the winding connecting to the solar inverter.

[0, 7]

Com address

Same as the communication address of RS485-1. Specifies the communication address for the solar inverter to connect to the upper-layer management unit. The address should not conflict with the addresses of other devices on the same bus.

[1, 247]

Parameter

Description

NMS server

Specifies the IP address or domain name of the management system.

NMS server port

Specifies the port number of the management system to which the SmartLogger connects over a network protocol.

SSL encryption

Retain the default value Enable.

NOTE

If this function is disabled, the data exchange between the SmartLogger and the management system is not encrypted, which poses security risks.

Cascading channel



Set this parameter to Enable for the solar inverter that is equipped with a Smart Dongle. If this parameter is set to Disable, the data from other cascaded solar inverters cannot be transferred.



For other solar inverters, retain the default value Disable.



Set MBUS communication parameters when the solar inverter uses the MBUS networking.

Table 7-9 MBUS communications parameters



Set management system parameters when the solar inverter connects to the management system through a Smart Dongle.

Table 7-10 Management system parameters

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Parameter

Description

Monthly Traffic Package

Set this parameter based on the SIM card package.

Monthly Used Traffic

Adjusts the monthly traffic. Network mode

Set this parameter based on the SIM card network mode.

APN mode

The default value is Automatic. If the Automatic mode cannot be used to access the Internet, set this parameter to Manual.

Identification type

When APN mode is set to Manual, set the parameters related to the SIM card with the information obtained from the carrier.

APN access point

APN dialup number

APN user name

APN user password



When connecting solar inverters to a third-party management system, you need to ensure that the third-party management system supports the standard Modbus TCP protocol and configure the access point table based on the definitions of Huawei solar inverter interfaces. You need to set NMS server and NMS server port for solar inverters as required by a third-party management system and replace the client certificate. A third-party management system must comply with the definitions of Huawei solar inverter interfaces. You need to obtain solar inverter interface definitions from Huawei technical support.



You are advised to retain the default values for other management system parameters.



Set 4G/GPRS communication parameters when the solar inverter connects to the management system through a 4G/GPRS Smart Dongle.

Table 7-11 4G/GPRS communications parameters



The solar inverter reserves the WLAN extension function, which is implemented by setting WLAN parameters.



When the solar inverter connects to the management system through a Smart Dongle, the Smart Dongle parameters can be used to enable automatic address allocation.

----End

7.1.5.1.7 Setting the Tracking System

Context

Parameter settings of the support parameters may vary depending on the vendor.

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Procedure

Step 1 Choose Function Menu > Settings > Tracking System to set support parameters.

Figure 7-14 Support parameters

Step 2 Swipe left on the screen, tap a support, and set parameters for the support.

Figure 7-15 Setting parameters of a single support

----End

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7.1.5.1.8 Setting a File Save Path

Context

In the Android system, you can modify the save path for user operation logs and SUN2000 logs and export logs from the path subsequently.

Procedure

Step 1 Choose Function Menu > Settings > File save path to set the file save path.

Figure 7-16 Setting the path

----End

7.1.5.1.9 Configuring a PV Plant

Precautions



In SDongle networking mode, synchronize the grid code, time, and date to the cascaded solar inverters by setting the parameters of the solar inverter where the SDongle is installed.



Ensure that the RS485-1 communications address is set to 1 for the solar inverter whose PV plant configuration parameters are to be set. Otherwise, the communication between the solar inverter and the upper-level management unit may be affected.



In MBUS networking mode, you can choose Function Menu > Running Info. > Details > Other to view the MBUS networking status and number of networked solar

inverters after setting parameters.

Procedure

Step 1 Choose Function Menu > Settings > PV plant configuration and set PV plant configuration

parameters.



If the solar inverter is networked in RS485 mode, set the PV plant configuration parameters in RS485 mode, and tap OK to go to the device search screen. If the search is successful, tap Parameter synchronization to synchronize parameters. If there is any failure in the synchronization list, tap the corresponding line to synchronize the data again.

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Figure 7-17 RS485 PV plant configuration

Parameter

Description

Value Range

Networking mode

Set this parameter to RS485.



RS485



MBUS

Parameter synchronization

Enable this parameter.



Disable



Enable

Grid code

Set this parameter based on the power grid code of the country or region where the solar inverters are located and the application scenario.

N/A

Date

Specifies the system date.

[2000-01-01, 2068-12-31]

Time

Specifies the system time.

[00:00:00, 23:59:59]

Table 7-12 RS485 networking



In MBUS networking mode, set the PV plant configuration parameters and tap OK to synchronize the parameters. If there is any failure in the synchronization list, tap the corresponding line to synchronize the data again.

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Figure 7-18 MBUS networking

Parameter

Description

Value Range

Networking mode

Set this parameter to MBUS.



RS485



MBUS

Parameter synchronization

Enable this parameter.



Disable



Enable

Grid code

Set this parameter based on the power grid code of the country or region where the solar inverters are located and the application scenario.

N/A

Date

Specifies the system date.

[2000-01-01, 2068-12-31]

Time

Specifies the system time.

[00:00:00, 23:59:59]

Anti-crosstalk

If Anti-crosstalk is enabled, a solar inverter whose SN is in the SN list can be networked.

NOTE

If the found solar inverters are not in the SN list, check Box-type transformer No. and Winding No. of the master solar inverter and restore them to the default value 0.



Disable



Enable

Set network frequency band

Set this parameter as required.



1.5–4.7 (MHz)



0.5–3.7 (MHz)



2.5–5.7 (MHz)



2–12 (MHz)

Table 7-13 MBUS networking

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Parameter

Description

Value Range

SN list

You can import, delete, and add an SN list.



Import



Delete



Add

----End

7.1.5.2 System Maintenance

7.1.5.2.1 Device inspection

Context

After a SUN2000 is put into use, it should be inspected periodically to detect any potential risks and problems.

Procedure

Step 1 Choose Function Menu > Maintenance > Inspection, and tap to start the SUN2000

inspection.

----End

7.1.5.2.2 Managing the License

Context

Smart I-V Curve Diagnosis can be used only after a license is purchased. The license file for Smart I-V Curve Diagnosis is stored in the SUN2000. The SUN2000 SN uniquely maps to the license.

You can view the SUN2000 license information and obtain the license status through the license management. Before a device is replaced, the current device license needs to be revoked so that the revocation code can be generated and used for applying for a new device license.

Procedure

Step 1 Choose Function Menu > Maintenance > License management. The License management

screen is displayed.



When License status is Normal, revoke the license by tapping .



When License status is Deregistered, export and view the license revocation code by tapping .



When License status is No license, load the license by tapping .

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Figure 7-19 License management

Parameter

Description

Value Range

Model

Set this parameter to the corresponding power meter model.



JANITZA-UMG604



JANITZA-UMG103



JANITZA-UMG104

NOTE



Select an appropriate power meter based on the application scenario. The device model is subject to change. The actual product prevails.



Set the meter model correctly, otherwise the meter function may not be available.

Device address

Set this parameter to the communication address of the power meter.

[1, 247]

----End

7.1.5.2.3 Device management

Step 1 Choose Function Menu > Maintenance > Device Mgmt to go to the Device Mgmt screen.



If there is no Smart Power Sensor on the screen, tap to add a Smart Power Sensor.

Huawei SUN2000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

About This Document

Contents

1 Safety Information

1.1 General Safety

1.2 Personnel Requirements

1.3 Electrical Safety

1.4 Installation Environment Requirements

1.5 Mechanical Safety

1.6 Commissioning

1.7 Maintenance and Replacement

2 Overview

2.1 Product Model

2.2 Overview

2.3 Label Description

2.4 Product Appearance

2.4.1 Product Appearance

2.4.2 Indicator Status

2.5 Working Principles

2.5.1 Circuit Diagram

2.5.2 Working Modes

3 Solar Inverter Storage

4 Installation

4.1 Check Before Installation

4.2 Tools

4.3 Determining the Installation Position

4.4 Installing the Mounting Bracket

4.4.1 Support-mounted Installation

4.4.2 Wall-mounted Installation

4.5 Installing a Solar Inverter

5 Electrical Connections

5.1 Precautions

5.2 Preparing Cables

5.3 Connecting the PE Cable

5.4 Opening the Maintenance Compartment Door

5.5 (Optional) Installing the Power Cable of the Tracking System

5.6 Connecting an AC Output Power Cable

5.7 Connecting DC Input Power Cables

5.8 Connecting the RS485 Communications Cable

6 Commissioning

6.1 Check Before Power-on

6.2 Powering On the SUN2000

7 Man-Machine Interactions

7.1 Operations with the SUN2000 App

7.1.1 App Introduction

7.1.2 Downloading and Installing the App

7.1.3 App Login

7.1.4 Operations Related to the Common User

7.1.4.1 Setting User Parameters

7.1.4.2 Starting and Shutting Down the SUN2000

7.1.5 Operations Related to the Advanced User

7.1.5.1 Parameter Settings

7.1.5.1.1 Setting Grid Parameters

7.1.5.1.2 Setting Protection Parameters

7.1.5.1.3 Setting Feature Parameters

7.1.5.1.4 Setting User Parameters

7.1.5.1.5 Setting the Grid-tied Control Parameters

7.1.5.1.6 Setting Communications Parameters

7.1.5.1.7 Setting the Tracking System

7.1.5.1.8 Setting a File Save Path

7.1.5.1.9 Configuring a PV Plant

7.1.5.2 System Maintenance

7.1.5.2.1 Device inspection

7.1.5.2.2 Managing the License

7.1.5.2.3 Device management