Huawei SUN2000-33KTL-US, SUN2000-36KTL-US User Manual

SUN2000-(33KTL, 36KTL, 40KTL)-US

User Manual

Issue

Date

07

2019-06-20

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2019. All rights reserved.

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: http://e.huawei.com

Issue 07 (2019-06-20) Copyright © Huawei Technologies Co., Ltd. i

SUN2000-(33KTL, 36KTL, 40KTL)-US

User Manual About This Document

About This Document

Purpose

This document describes the SUN2000-33KTL-US/36KTL-US/40KTL-US (SUN2000 for short) in terms of its installation, electrical connections, commissioning, maintenance, and troubleshooting. Understand the safety information and get familiar with the SUN2000 functions and features before installing and operating the SUN2000.

Intended Audience

This document is intended for photovoltaic (PV) plant personnel and qualified electrical technicians.

Symbol Conventions

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

Symbol Description

Indicates an imminently hazardous situation which, if not avoided, will result in serious injury or death.

Indicates a potentially hazardous situation which, if not avoided, could result in serious injury or death.

Indicates a potentially hazardous situation which, if not avoided, may 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.

Calls attention to important information, best practices and tips.

NOTE is used to address information not related to

Issue 07 (2019-06-20) Copyright © Huawei Technologies Co., Ltd. ii


User Manual

Symbol

About This Document

Description personal injury, equipment damage, and environment deterioration.

Change History

Changes between document issues are cumulative. The latest document issue contains all updates made in previous issues.

Issue 07 (2019-06-20)

Updated 6.2 Powering On the SUN2000 .

Issue 06 (2018-07-12)

Changed Power Grid Types

in 2.1 Product Overview to

Power Grid Earthing Systems .

Updated 8.2 Troubleshooting .

Issue 05 (2018-05-06)

Updated 5.4 Connecting AC Output Power Cables .

Added the description about the metal stamping forming contact in 5.5 Connecting DC Input

Power Cables .

Updated 8.1 Routine Maintenance .

Added B Contact Information .

Issue 04 (2017-11-06)

Updated 5.4 Connecting AC Output Power Cables .

Issue 03 (2017-07-15)

Updated 5.2.1 Grounding the SUN2000 over a PE Point .

Updated 10 Technical Specifications .

Issue 07 (2019-06-20) Copyright © Huawei Technologies Co., Ltd. iii


User Manual About This Document

Issue 02 (2017-06-09)

Added the description of supplying the mounting bracket separately to 4.5 Installing the

Mounting Bracket .

Added the description of preparing MC4 DC terminals to 5.5 Connecting DC Input Power

Cables .

Issue 01 (2017-04-01)

This issue is the first official release.

Issue 07 (2019-06-20) Copyright © Huawei Technologies Co., Ltd. iv


User Manual Contents

Contents

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

1 Safety Precautions ......................................................................................................................... 1

2 Overview ......................................................................................................................................... 4

2.1 Product Overview ......................................................................................................................................................... 4

2.2 Appearance ................................................................................................................................................................... 6

2.3 Label Description ........................................................................................................................................................ 10

2.4 Working Principle ....................................................................................................................................................... 13

3 SUN2000 Storage ......................................................................................................................... 16

4 System Installation ..................................................................................................................... 17

4.1 Checking Before Installation ...................................................................................................................................... 17

4.2 Tools ........................................................................................................................................................................... 18

4.3 Determining the Installation Position ......................................................................................................................... 22

4.4 Moving the Inverter .................................................................................................................................................... 27

4.5 Installing the Mounting Bracket ................................................................................................................................. 28

4.5.1 Wall-mounted Installation ........................................................................................................................................ 29

4.5.2 Common Support-mounted Installation ................................................................................................................... 31

4.5.3 Tilted Support-mounted Installation ........................................................................................................................ 33

4.6 Installing the SUN2000 .............................................................................................................................................. 34

4.7 (Optional) Installing the DC Protection Shroud ......................................................................................................... 37

5 Connecting Cables ...................................................................................................................... 40

5.1 Preparing OT Terminals .............................................................................................................................................. 40

5.2 Connecting the Ground Cable ..................................................................................................................................... 41

5.2.1 Grounding the SUN2000 over a PE Point ............................................................................................................... 42

5.2.2 PV Side Grounding .................................................................................................................................................. 43

5.3 Opening the Maintenance Compartment Door ........................................................................................................... 44

5.4 Connecting AC Output Power Cables ......................................................................................................................... 46

5.4.1 Connection Through a Pipe ..................................................................................................................................... 46

5.4.2 Common Connection ............................................................................................................................................... 54

5.5 Connecting DC Input Power Cables ........................................................................................................................... 61

5.6 Connecting Communications Cables .......................................................................................................................... 71

5.6.1 Communication Mode Description .......................................................................................................................... 71

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User Manual Contents

5.6.2 Selecting a Mode for Connecting RS485 Communications Cables ......................................................................... 72

5.6.3 Connecting RS485 Communications Cables Through a Pipe .................................................................................. 75

5.6.4 Connecting the RS485 Communications Cable in a Common Way ........................................................................ 79

5.7 Closing the Maintenance Compartment Door ............................................................................................................ 84

6 System Commissioning ............................................................................................................. 87

6.1 Checking Before Power-On ........................................................................................................................................ 87

6.2 Powering On the SUN2000 ........................................................................................................................................ 87

6.3 Powering Off the SUN2000 ........................................................................................................................................ 93

7 Man-Machine Interactions ........................................................................................................ 95

7.1 Operations with a USB Flash Drive............................................................................................................................ 95

7.1.1 Exporting Configurations ........................................................................................................................................ 95

7.1.2 Importing Configurations ........................................................................................................................................ 97

7.1.3 Exporting Data ......................................................................................................................................................... 98

7.1.4 Upgrading ................................................................................................................................................................ 98

7.2 Operations with a SmartLogger ................................................................................................................................ 100

7.3 Operations with the NMS ......................................................................................................................................... 100

7.4 Operations with the SUN2000 APP .......................................................................................................................... 100

8 Maintenance ............................................................................................................................... 101

8.1 Routine Maintenance ................................................................................................................................................ 101

8.2 Troubleshooting ........................................................................................................................................................ 102

9 Handling the SUN2000 ............................................................................................................ 110

9.1 Removing the SUN2000 ........................................................................................................................................... 110

9.2 Packing the SUN2000 ............................................................................................................................................... 110

9.3 Disposing of the SUN2000 ....................................................................................................................................... 110

10 Technical Specifications ........................................................................................................ 111

A Grid Codes................................................................................................................................. 115

B Contact Information ................................................................................................................. 116

C Acronyms and Abbreviations ................................................................................................ 117

Issue 07 (2019-06-20) Copyright © Huawei Technologies Co., Ltd. vi


User Manual 1 Safety Precautions

1

Safety Precautions

Before performing operations, read through this manual and follow all the precautions to prevent accidents. The safety precautions provided in this document do not cover all the safety precautions. Huawei shall not be liable for any consequence caused by the violation of the safety operation regulations and design, production, and usage standards.

Declare







Huawei shall not be liable for any consequence caused by any of the following events.







Transportation

The storage conditions do not meet the requirements specified in this document.

Violate the operation instructions and safety precautions in this document for installation, cable connecting, and maintenance.

Operation in extreme environments which are not covered in this document

Unauthorized modifications to the product or software code

Installation or use in environments which are not specified in related international standards

Important Safety Instructions

Save These Instructions: This manual contains important instructions for the

SUN2000-33KTL-US/36KTL-US/40KTL-US that shall be followed during installation and maintenance of the SUN2000.

Caution: Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

Personnel Requirements

Only qualified electrical technicians are allowed to install and operate the SUN2000.





Operation personnel should receive professional training.

Operation personnel should read through this document and follow all the precautions.

Issue 07 (2019-06-20) Copyright © Huawei Technologies Co., Ltd. 1


User Manual



1 Safety Precautions

Operation personnel should be familiar with the safety specifications about the electrical system.

 Operation personnel should understand the composition and working principles of the grid-tied PV power system and local regulations.

Sign Protection





Do not tamper with any warning signs on the SUN2000 chassis because these signs contain important information about safe operation.

Do not tamper with the nameplate on the SUN2000 chassis because it contains important product information.

Installation











Ensure that the SUN2000 is not connected to a power supply and is not powered on before starting installation.

Ensure that there are no objects within 300 mm (11.81 in.), 200 mm (7.87 in.), 500 mm

(19.69 in.), 600 mm (23.62 in.), and 1000 mm (39.37 in.) of the left, right, top, bottom, and front of the SUN2000, respectively. This is to allow sufficient space for installation and heat dissipation. For ease of installation, ensure that the SUN2000 bottom is at most

730 mm (28.74 in.) from the ground. If you have any questions about the distance, consult the local technical support engineers.

Ensure that the SUN2000 is installed in a well ventilated environment.

Ensure that the SUN2000 heat sinks are free from blockage.

Open the maintenance compartment door of the chassis before connecting cables. Do not perform any operation on other components inside the chassis except connecting AC power cables and communications cables.

Cable Connections

Before connecting cables, ensure that the SUN2000 is securely positioned and not damaged in any way. Otherwise, electric shocks or fire may occur.







Ensure that all electrical connections comply with local electrical standards.

Obtain approval from the local power supply department before using the SUN2000 to generate electricity in grid-tied mode.

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

Operation

High voltages may cause electric shocks and serious injuries during SUN2000 operating.

Strictly comply with the safety precautions in this document and associated documents when operating the SUN2000.



User Manual



1 Safety Precautions

Do not touch an operating SUN2000 because the heat sinks may have a temperature over

60°C (140°F) and may cause burns when the SUN2000 is operating.

 Follow local laws and regulations when operating the equipment.

Maintenance and Replacement

High voltages may cause electric shocks and serious injuries during SUN2000 operating.

Therefore, before maintenance, power off the SUN2000 and strictly comply with the safety precautions in this document and associated documents to operate the SUN2000.













Maintain the SUN2000 with sufficient knowledge of this document and proper tools and testing equipment.

Before performing maintenance tasks, power off the SUN2000 and wait at least 5 minutes.

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

Rectify any faults that may compromise the SUN2000 security performance before powering on the SUN2000 again.

Observe ESD precautions during the maintenance.

For personal safety, wear insulation gloves and protective shoes.



User Manual 2 Overview

2

Overview

2.1 Product Overview

Function

The SUN2000 is a three-phase grid-tied PV string inverter that converts the DC power generated by PV strings into AC power and feeds the power into the power grid.

Model

Figure 2-1 describes the model number of the SUN2000-33KTL-US.

Figure 2-1 Model number description

Table 2-1 describes the rated output power and voltage of all models of SUN2000s.

Table 2-1 SUN2000 models and corresponding rated output power and voltage

Model Rated Output Power Rated Output Voltage

SUN2000-33KTL-US

SUN2000-36KTL-US

SUN2000-40KTL-US

33.3 kW

36 kW

40 kW

480 V

480 V

480 V




Network Application

The SUN2000 applies to grid-tied PV power systems for commercial rooftops and large power stations. Typically, a grid-tied PV power system consists of PV strings, grid-tied inverters, AC power distribution units, and isolation transformers.

Figure 2-2 Network application

(C) ACDU (A) PV string

(D) Isolation transformer

(B) SUN2000

(E) Power grid

Power Grid Earthing Systems

The following figure shows the power grid earthing systems supported by the SUN2000.

Figure 2-3 Power Grid Earthing System

The SUN2000 can be installed in common transformer secondary winding configuration such as neutral grounded Y, neutral ungrounded Y, delta (floating). For any other transformer configuration, please contact Huawei.



User Manual

2.2 Appearance

SUN2000 Dimensions

Figure 2-4 shows the SUN2000 dimensions.

Figure 2-4 SUN2000 dimensions (including the mounting plate)

2 Overview

Front View

Figure 2-5 shows the SUN2000 front view.



User Manual

Figure 2-5 SUN2000 front view

2 Overview

(2) LED indicator (1) Maintenance compartment door

Table 2-2 describes the LED indicators.

(3) Host panel

Table 2-2 LED indicator description (from left to right)

Indicator

PV connection indicator

Grid-tied indicator

Communications indicator

Status

Green on

Green off

Green on

Green off

Blinking green at short intervals (on for

0.5s and then off for 0.5s)

Green off

Meaning

At least one PV string is properly connected, and the DC input voltage of the corresponding MPPT circuit is higher than or equal to 200 V.

The SUN2000 disconnects from all PV strings, or the DC input voltage of each MPPT circuit is less than 200 V.

The SUN2000 connects to the power grid.

The SUN2000 does not connect to the power grid.

The SUN2000 receives communications data normally.

The SUN2000 receives no communications data for 10s.



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Indicator

Alarm/Maintenanc e indicator

Status

Alarm status

Local maintenance status

2 Overview

Meaning

A warning alarm is generated.

Blinking red at long intervals (on for 1s and then off for 4s)

Blinking red at short intervals (on for 0.5s and then off for 0.5s)

A minor alarm is generated.

Steady red A major alarm is generated.

Blinking green at long intervals (on for

1s and then off for

1s)

Local maintenance is in progress.

Local maintenance fails. Blinking green at short intervals (on for 0.125s and then off for 0.125s)

Steady green Local maintenance succeeds.





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 the alarming and the local maintenance happen concurrently, 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.

SUN2000 Rear View

Figure 2-6 shows the SUN2000 rear view.



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Figure 2-6 SUN2000 rear view

2 Overview

(1) Heat sink (2) Mounting plate

SUN2000 bottom view

Figure 2-7 shows the SUN2000 bottom view.

Figure 2-7 SUN2000 bottom view

3

4

5

No.

1

2

Component

3/4-inch waterproof cable connector

2-inch waterproof cable connector

USB port

DC switch 1

DC switch 2

Description

Inner diameter: 14–18 mm (0.55–0.71 in.)


N/A

N/A

N/A

Silk Screen

COM1, COM2, COM3

AC OUTPUT

USB

DC SWITCH 1

DC SWITCH 2



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Silk Screen

RESERVE

2 Overview

No.

6

7

8

Component

1/2-inch waterproof cable connector

DC input terminal

DC input terminal

Description


Controlled by DC

SWITCH 1

Controlled by DC

SWITCH 2

N/A

+/–

+/–

9 PV side ground point GND





Waterproof cable connector is abbreviated as waterproof connector in the following text.

Use the USB port only during maintenance (such as power-on setting, upgrade, and data export).

Ensure that the USB cover is tightened when the USB port is not in use.

2.3 Label Description

Warning Signs

Warning signs are available on the SUN2000 side, as described in Table 2-3 .

Table 2-3 Warning signs

Symbol Name

Electric shock

Meaning













Lethal voltages 1000 V DC. Keep out.

No user serviceable parts inside. Only trained service personnel are allowed access.

Both AC and DC voltage sources are terminated inside this equipment. Each circuit must be disconnected before servicing.

When the photovoltaic array is exposed to light, it supplies DC voltage to this equipment.

The DC conductors of this photovoltaic system are ungrounded and may be energized.

The DC conductors of this photovoltaic system are normally ungrounded but will become intermittently grounded without indication when the SUN2000 measures the PV array isolation.

Do not touch a running SUN2000 because it generates high temperatures on the shell.

Burn warning



User Manual

Symbol Name

Delay discharge

Transformerless inverter

2 Overview

Meaning





High voltage exists after the SUN2000 is powered on. Only qualified and trained electrical technicians are allowed to perform operations on the SUN2000.

Residual voltage exists after the SUN2000 is powered off. It takes 5 minutes for the

SUN2000 to discharge to the safe voltage.

The SUN2000 output does not pass through an isolation transformer.

Symbols

Table 2-4 describes the labels on the SUN2000 chassis and their meanings.

Table 2-4 Label description

Symbol Name

PE point

Meaning

Indicates the position for connecting the PE cable.

Operation warning Do not remove the DC input connector when the

SUN2000 is running.

SUN2000 serial number label

Indicates the SUN2000 serial number.

Nameplate

The SUN2000 is labeled with a nameplate on the side that contains the model information,

technical specifications, and compliance symbols, as shown in Figure 2-8 .



User Manual

Figure 2-8 Nameplate of the SUN2000-33KTL-US

2 Overview

(1) Trademark and product model

(3) Compliance symbols

(2) Important technical specifications

(4) Company name and country of manufacture

The nameplate figure is for reference only. The actual nameplate prevails.

Table 2-5 describes the compliance symbols.

Table 2-5 Compliance symbols

Symbol Name

American FCC Part 15B certification

Meaning

The SUN2000 complies with FCC Part 15B certification standards.

American FCC Part 15G certification

The SUN2000 complies with FCC Part 15G certification standards.

Canadian IC certification The SUN2000 complies with ICES certification standards.



User Manual

Symbol Name

CSA certification of

America and Canada

EFUP label

WEEE label

2 Overview

Meaning

The SUN2000 complies with CSA certification standards.

The SUN2000 does not pollute the environment during the specified period.

Do not dispose of the

SUN2000 as household garbage.

2.4 Working Principle

Conceptual Diagram

The SUN2000 receives inputs from eight PV strings. Then the inputs are grouped into four

MPPT routes inside the SUN2000 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. Figure 2-9 shows the SUN2000

conceptual diagram.

Figure 2-9 SUN2000 conceptual diagram




Working Modes

The SUN2000 can work in standby, operating, or shutdown mode. Figure 2-10 shows the

relationship between the three working modes.

Figure 2-10 SUN2000 working modes

Table 2-6 describes the three working modes shown in Figure 2-10 .

Table 2-6 Working mode description

Working

Mode

Description

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

 The SUN2000 continuously performs self-check and enters the operating mode once the operating requirements are met.

 If the SUN2000 enters the 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.

 The SUN2000 enters the shutdown mode after detecting a fault or a shutdown command, and enters the standby mode after detecting that the

PV string output power does not meet the requirements for grid-tied electricity generation.




Working

Mode

Description

Shutdown  In standby or operating mode, the SUN2000 enters the shutdown mode after detecting a fault or shutdown command.

 In shutdown mode, the SUN2000 enters the standby mode after detecting a startup command or that a fault is rectified.



User Manual 3 SUN2000 Storage

3

SUN2000 Storage

The following requirements should be met if the SUN2000 is not put into use directly:













Put the SUN2000 in the original package. Keep the desiccant and seal it using the adhesive tape.

Keep the storage temperature at –40°C to +70°C (–40°F to +158°F) and the humidity at

5%–95% RH.

The SUN2000 should be stored in a clean and dry place and be protected from dust and water vapor corrosion.

A maximum of five SUN2000s can be stacked.

Periodic inspections are required during the storage. If any rodent bites are found, replace the packing materials immediately.

If the SUN2000 has been long-term stored, inspections and tests should be conducted by qualified personnel before it is put into use.



User Manual 4 System Installation

4

System Installation

4.1 Checking Before Installation

Outer Packing Materials

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

Figure 4-1 Position of the inverter model label

(1) Position of the model label

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

Package Contents

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

For details about the number of contents, see the Packing List in the packing case.



User Manual

4.2 Tools

4 System Installation

Prepare tools required for installation and cable connections.

Tool

Hammer drill

Model

Drill bit: Φ14 mm (0.54 in.) and Φ16 mm (0.63 in.)

Function





Φ14 mm (0.54 in.) drill bit:

Drills holes in supports.

Φ16 mm (0.63 in.) drill bit:

Drills holes in walls.

Socket wrench set Works with a torque wrench.

Secures bolts and AC output terminals.

Torque wrench N/A Secures bolts and AC output terminals.

Diagonal pliers N/A Cut cable ties.

Wire stripper N/A Peels cable jackets.

Torque screwdriver 



Flat head: M3

Phillips head: M4





Connects cables to the terminal block.

Secure the AC filter.



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Tool

Rubber mallet

Model

N/A

Utility knife N/A


Function

Hammers expansion bolts into holes.

Removes packages.

Cable cutter N/A

Issue 07 (2019-06-20) Copyright © Huawei Technologies Co., Ltd.

Cuts power cables.

RJ45 crimping tool N/A Prepares RJ45 connectors for communications cables.

Amphenol Helios H4 crimping tool

Amphenol Helios H4 open-end spanner

Model: UTXTC0005 or

H4TC0003

Manufacturer: Amphenol

Crimps metal contacts when preparing DC input power cables.

NOTE

 UTXTC0005 (Amphenol) is used to crimp metal cold forming contacts.

 H4TC0003 (Amphenol) is used to crimp metal stamping forming contacts.

H4TW0001

Manufacturer: Amphenol

Removes Amphenol Helios H4

DC connectors from the

SUN2000.

19


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Tool

MC4 crimping tool

Model

PV-CZM-19100


Function

Crimps MC4 metal contacts when preparing DC input power cables.

MC4 open-end spanner PV-MS open-end spanner

Removes MC4 DC connectors from the SUN2000.

Vacuum cleaner N/A Cleans up dust after drilling holes.

Multimeter DC voltage measurement range ≥ 1000 V DC

Measures voltages.

Marker N/A Marks signs.

Measuring tape N/A Measures distances.



User Manual

Tool

Level

Model

N/A

Protective gloves N/A

Anti-dust respirator N/A

Protect your hands during installation.

Insulation gloves

Operating voltage ≥ 2000

V

Protect you from electric shocks.

Safety goggles N/A Protect your eyes during hole drilling.

Protects you from dust during hole drilling.

Hydraulic pliers N/A Crimp OT terminals.


Function

Levels hole positions.



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Tool

Heat shrink tubing

Model

N/A

Heat gun N/A


Function

Wraps the cable crimping area of an OT terminal.

Heat-shrinks a tube.

Cable tie N/A Binds cables.

Install devices in accordance with the installation laws and regulations of the country or region where the project is located.

4.3 Determining the Installation Position

Basic Requirements

 The SUN2000 is protected to Type 4X and can be installed indoors or outdoors.

 Do not install the SUN2000 in a place where personnel are easy to come into contact with its chassis and heat sinks, because these parts are extremely hot during operation.

 Do not install the SUN2000 in areas with flammable or explosive materials.

Installation Environment Requirements

The SUN2000 must be installed in a well ventilated environment to ensure good heat dissipation. When installed under direct sunlight, performance de-rate may be initiated due to additional temperature rise. Recommended: Install the SUN2000 in a sheltered place or a place with an awning.



User Manual

Carrier Requirements

 The carrier where the SUN2000 is installed must be fireproof.

 Do not install the SUN2000 on flammable building materials.

 Ensure that installation surface is solid enough to bear the SUN2000.


 In residential areas, do not install the SUN2000 on gypsum boards or walls made of similar materials which have a weak sound insulation performance because the noises generated by the SUN2000 disturb residents.

Installation Angle Requirements

The SUN2000 can be installed on a wall, normal support, and tilted support.

Tilt requirements for installing a SUN2000 on a wall and normal support:





Install the SUN2000 vertically or at a maximum back tilt of 15 degrees to facilitate heat dissipation.

Do not install the SUN2000 at a front tilt, excessive back tilt, side tilt, horizontally, or upside down.

Figure 4-2 Wall-mounted installation and normal support-mounted installation

Tilt requirements for installing a SUN2000 on a tilted support:





Install the SUN2000 vertically or at a maximum back tilt of 75 degrees to facilitate heat dissipation.

Do not install the SUN2000 at a front tilt, excessive back tilt, side tilt, horizontally, or upside down.



User Manual

Figure 4-3 Tilted support-mounted installation


The SUN2000 may operate with power derating if installed with a tilt.

Installation Space Requirements

 The SUN2000 dimensions (W x H x D, including the mounting plate) are 930 mm x 550 mm x 283 mm (36.61 in. x 21.65 in. x 11.14 in.). Reserve enough clearance around the

SUN2000 to ensure sufficient space for installation and heat dissipation.




Figure 4-4 Installation space requirements (non-back-to-back installation)

Figure 4-5 Installation space requirements (back-to-back installation)



For ease of installing the SUN2000 on the mounting bracket, connecting cables to the bottom of the

SUN2000, and maintaining the SUN2000 in future, it is recommended that the bottom clearance be between 600 mm (23.62 in.) and 730 mm (28.74 in.). If you have any questions about the distance, consult the local technical support engineers.

When installing multiple SUN2000s, 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. The following figures show the wall-mounted installation modes and provide reference for other installation modes.



User Manual

Figure 4-6 Horizontal installation mode (recommended)


Figure 4-7 Triangle installation mode (recommended)



User Manual

Figure 4-8 Stacked installation mode (not recommended)


4.4 Moving the Inverter

Context

 To prevent device damage and personal injury, keep balance when moving the SUN2000 because the SUN2000 is heavy.

 Do not place the SUN2000 with its wiring terminals at the bottom contacting the floor or any other object because the terminals are not designed to support the weight of the

SUN2000.

 When placing the SUN2000 on the floor, put foam or paper under the SUN2000 to protect its cover.

Procedure

Step 1

Arrange two persons to hold the handles on both sides of the SUN2000.



User Manual

Figure 4-9 Lifting the SUN2000


Step 2

Lift the SUN2000 from the packing case and move it to the installation position with the help of multiple persons.

----End

4.5 Installing the Mounting Bracket

The mounting bracket is supplied with the SUN2000 or separately.

The mounting bracket 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.

Two round holes are preferred.

Figure 4-10 Mounting bracket dimensions

Before installing the mounting bracket, check whether there is a security torx wrench on the mounting bracket.





If yes, remove the security torx wrench from the mounting bracket and save it for later

use. Figure 4-11 shows the position for storing the security torx wrench.

If no, obtain a security torx wrench from the SUN2000 fitting bag.



User Manual

Figure 4-11 Position for storing a security torx wrench


4.5.1 Wall-mounted Installation

Procedure

Step 1

Determine the positions for drilling holes using the mounting bracket. Level the hole positions using a level, and mark the hole positions using a marker.

Figure 4-12 Determining hole positions

Step 2

Drill holes using a hammer drill and install the supplied expansion bolts.

Avoid drilling holes in the water pipes and power cables buried in the wall.

An expansion bolt contains four parts, as shown in Figure 4-13 .



User Manual

Figure 4-13 Expansion bolt components


(2) Flat washer (1) Expansion sleeve (3) Spring washer

Figure 4-14 Drilling a hole and installing an expansion bolt

(4) Bolt

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

 Wipe away any dust in or around the holes and measure the hole distance. If the holes are inaccurately positioned, drill holes again.

 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 concrete wall.

1.

Drill a hole at a marked hole position in the wall using a hammer drill.

2.

Slightly tighten an expansion bolt, vertically insert an expansion bolt into a hole, and knock the expansion bolt completely into the hole by using a rubber mallet.

3.

Partially tighten the expansion bolt.

4.

Remove the nut, spring washer, and flat washer.

Step 3

Align the mounting bracket holes with the drilled holes, insert expansion bolts into the holes through the mounting bracket, and then tighten the expansion bolts.



User Manual

Figure 4-15 Securing a mounting bracket


----End

4.5.2 Common Support-mounted Installation

Procedure

Step 1



Step 2

Drill holes using a hammer drill.

You are advised to apply anti-rust paint on the hole positions for protection.



User Manual

Figure 4-17 Drilling holes


Step 3

Align the mounting bracket holes with the drilled holes, insert supplied bolt assemblies (flat washers, spring washers, and bolts) into the holes through the mounting bracket, and secure them using stainless steel nuts and flat washers.

If the screw length does not meet the installation requirements, prepare M12 bolt assemblies by yourself.


----End



User Manual

4.5.3 Tilted Support-mounted Installation


Procedure

Step 1



Step 2

Drill holes using a hammer drill.

You are advised to apply anti-rust paint on the hole positions for protection.

Figure 4-20 Drilling holes




Step 3

Align the mounting bracket holes with the drilled holes, insert supplied bolt assemblies (flat washers, spring washers, and bolts) into the holes through the mounting bracket, and secure them using stainless steel nuts and flat washers.

If the screw length does not meet the installation requirements, prepare M12 bolt assemblies by yourself.


----End

4.6 Installing the SUN2000

Procedure

Step 1

If the installation position is low and you can mount the SUN2000 onto the mounting bracket,

go to Step 3

and then Step 5 .

Step 2

If the installation position is high and you cannot mount the SUN2000 onto the mounting

bracket, perform Step 3

to Step 6 .

Step 3 Ensure that two people lift the SUN2000 and turn it upright. Lift the SUN2000 by grasping the handle at the bottom of the SUN2000 with one hand and the handle at the top with the other.

To prevent personal injury caused by a falling SUN2000, keep balance when lifting the

SUN2000 because it is heavy.



User Manual

Figure 4-22 Lifting a SUN2000


Step 4

Run a rope that is strong enough to bear the SUN2000 through the lifting eyes and hoist the

SUN2000.

When hoisting the SUN2000, keep balance to protect the SUN2000 from colliding with the wall or other objects.



User Manual

Figure 4-23 Hoisting a SUN2000


Step 5

Install the SUN2000 on the mounting bracket and level the SUN2000 chassis with the mounting bracket.



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Figure 4-24 Mounting the SUN2000 onto the mounting bracket


Step 6

Tighten the two security torx screws using a security torx wrench to a torque of 5 N·m.

Figure 4-25 Tightening security torx screws

----End

4.7 (Optional) Installing the DC Protection Shroud

Context

To avoid electric shocks, you are advised to install a DC protection shroud in a rooftop PV plant.



User Manual

Procedure

Step 1

Install the protection shroud bracket.

Figure 4-26 Installing a bracket


Step 2

Install the protection shroud rear panel.

Figure 4-27 Installing a rear panel

----End




Follow-up Procedure

Before connecting cables, prepare a Φ2 in. tube and perform the following operations. Failing to do so may cause reworking.

1.

Secure the pipe fitting to the enclosure using the nut delivered with the pipe.

2.

Route the ground cable that needs to connect to the ground point on the PV side and the

DC input power cable through the tube conduit and then fittings.

3.

Connect the ground cable to the ground point on the PV side (see 5.2.2 PV Side

Grounding ).

4.

Connect the DC input power cable by following the instructions in 5.5 Connecting DC

Input Power Cables .

5.

Connect the conduit and fitting of the pipe.

6.

Check that the cables are connected correctly and securely. Then take appropriate measures to ensure that the pipe conduit and fitting are secured reliably, and seal the cable hole.

7.

Clear foreign matter from the protection shroud.

8.

Install the front cover of the protection shroud.

Figure 4-28 Installing a front cover



User Manual 5 Connecting Cables

5

Connecting Cables

Precautions

Before connecting cables, ensure that the two DC switches on the inverter are OFF. Otherwise, the high voltage of the inverter may result in electric shocks.

To prevent poor cable connection due to overstress, it is recommended that the cables be bent and reserved, and then connected to the appropriate ports.

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

5.1 Preparing OT Terminals

Figure 5-1 shows how to prepare an OT terminal.




 Avoid scratching the core wire when stripping a cable.

 The cavity formed after the conductor crimp strip of the OT terminal is crimped must wrap the core wires completely. The core wires must contact the OT terminal closely.

 Wrap the wire crimping area with heat shrink tubing or PVC insulation tape. The following figure uses heat shrink tubing as an example.

 When using the heat gun, protect devices from being scorched.

Figure 5-1 Preparing an OT terminal

5.2 Connecting the Ground Cable




 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 cable, and communications cable, connect ground cables to the PE point and

PV side ground point.

 It is recommended that the ground cable be connected to a nearby ground point. Connect the ground points of all SUN2000s in the same PV array to ensure equipotential connections to ground cables.

5.2.1 Grounding the SUN2000 over a PE Point

Prerequisites

The ground point on the enclosure is preferred to connect to the PE cable for the SUN2000.

The ground point in the maintenance compartment is mainly used for connecting to the ground cable included in the multi-core AC power cable.





If you connect a ground cable to the PE point on the shell, ensure that the ground cable and OT terminal are available.

− Recommended ground cable: an outdoor copper-core cable with a cross-sectional area of 6 AWG or more

− OT terminal: M6

If you connect a ground cable to the PE point in the maintenance compartment, prepare

the AC output power cable together with the ground cable. For details, see 5.4

Connecting AC Output Power Cables .

Context

There are two ground points on the enclosure and one of them is standby.

Procedure

Step 1

Prepare the OT terminal.

Step 2

Secure the ground cable using the ground screw.



User Manual

Figure 5-2 Connecting a ground cable

5 Connecting Cables

(1) Reserved PE point

----End


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

5.2.2 PV Side Grounding

Prerequisites

A ground cable and an OT terminal are available.





Recommended ground cable: an outdoor copper-core cable with a cross-sectional area of

6 AWG or more

OT terminal: M6

Procedure

Step 1 Prepare the OT terminal.

Step 2

Secure the ground cable using the ground screw.



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Figure 5-3 Connecting a ground cable

5 Connecting Cables

----End


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

5.3 Opening the Maintenance Compartment Door

Prerequisites

 Never open the host panel of the SUN2000.

 Before opening the maintenance compartment door, disconnect the AC and DC power

supplies. For processes of disconnecting the power supplies, see 6.3 Powering Off the

SUN2000 . After powering off the SUN2000, wait at least 5 minutes before performing

operations on it.

 If you need to open the maintenance compartment door in rainy or snowy days, take protective measures to prevent rain and snow entering the maintenance compartment. If it is impossible to take protective measures, do not open the maintenance compartment door in rainy or snowy days.

 Do not leave unused screws in the maintenance compartment.

Procedure

Step 1

Remove the two screws from the maintenance compartment door using a security torx wrench and set them aside.



User Manual

Figure 5-4 Removing screws

5 Connecting Cables

Step 2

Open the maintenance compartment door and adjust the support bar.

Figure 5-5 Adjusting a support bar

Step 3

Remove the AC terminal cover and set it aside.



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Figure 5-6 Removing an AC terminal cover

5 Connecting Cables

To highlight the involved area, the figure does not show the open door.

----End

5.4 Connecting AC Output Power Cables

A three-phase AC switch needs to be configured outside the AC side of the SUN2000. To ensure that the SUN2000 can safely disconnect from the power grid under abnormal conditions, select an appropriate overcurrent protection device according to local power distribution regulations.

Do not connect loads between the SUN2000 and the AC switch.





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

The AC output power cable can be connected in a common way or through a pipe.

5.4.1 Connection Through a Pipe

Prerequisites

The AC output power cable, OT terminal, and pipe are available.





Use a cable that can withstand 90°C (194°F) or 105°C (221°F). To facilitate the installation, you are advised to use cords.

If you connect a ground cable to the PE point on the chassis shell in the scenario with no neutral wire, you are advised to use three single-core outdoor cables (L1, L2, and L3).



User Manual



5 Connecting Cables

If you connect a ground cable to the PE point in the maintenance compartment in the scenario with no neutral wire, you are advised to use four single-core outdoor cables (L1,

L2, L3, and PE).





If you connect a ground cable to the PE point on the chassis shell in the scenario with a neutral wire, you are advised to use four single-core outdoor cables (L1, L2, L3, and N).

If you connect a ground cable to the PE point in the maintenance compartment in the scenario with a neutral wire, you are advised to use five single-core outdoor cables (L1,

L2, L3, N, and PE).

Table 5-1 describes the cable specifications.

Table 5-1 Cable specifications

Cable Specifications

Conductor cross-sectional area

Cable outer diameter

Copper-Core Cable

Value range

Recomm ended value

6–2/0 AWG

4 AWG

6.3–12.1 mm (0.25–0.48 in.)

Copper-Clad

Aluminum Cable or

Aluminum Alloy

Cable

4–2/0 AWG

2 AWG





OT terminal: M8 (L1, L2, L3, and N) and M6 (PE)

Pipe: 2-inch pipe

Requirements for OT terminals:







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

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

If an aluminum alloy cable is used, use a copper to aluminum adapter terminal or an aluminum wiring terminal with a copper to aluminum adapter washer.




 Directly connecting an aluminum wiring terminal to the AC terminal block will cause electro-chemical corrosion and weaken the cable connection reliability.

 The copper to aluminum adapter terminal or an aluminum wiring terminal with a copper to aluminum adapter washer must comply with UL486-A and UL486-B.

 Do not mix up the aluminum and copper sides of the copper to aluminum adapter washer.

Ensure that the aluminum side of the washer contacts the aluminum wiring terminal, and the copper side contacts the AC terminal block.

Figure 5-7 Requirements for OT terminals

Context

The pipe specifications should comply with the waterproof connector specifications. For example, for a 2-inch waterproof connector, prepare a 2-inch pipe.



User Manual

Figure 5-8 Pipe

5 Connecting Cables

(1) Nut (2) Fitting (3) Conduit

The pipe appearance is for reference only. The actual pipe prevails.

Figure 5-9 shows the diameters of the cable holes at the bottom of the chassis after the

waterproof connectors are removed.

Following are the reference torque values for the waterproof connector and pipe. Observe the requirements of the specific manufacturer, if any.



AC OUTPUT and COM ports: 7.5 N•m (plastic) or 10 N•m (metal)

 RESERVE port: 3.75 N•m (plastic) or 6.25 N•m (metal)

Figure 5-9 Diameters of the bottom cable holes

Procedure

Step 1 Install the pipe fittings.

1.

Remove the AC filter and keep the screws aside.

2.

Remove the locking cap and plug from the waterproof connector, and then remove the waterproof connector.

3.

Secure the pipe fittings to the chassis using the nut delivered with the pipe.



User Manual

4.

Place the AC filter.

Figure 5-10 Installing pipe fittings

5 Connecting Cables

Step 2

Route the AC output power cable through the conduit and fittings of the pipe, and then the

AC filter.

Step 3 Prepare the OT terminal.

Pay attention to the OT terminal and ensure that it can successfully connect to the AC terminal block.



User Manual

Figure 5-11 OT terminal direction (using one cable as an example)

5 Connecting Cables

Step 4

Connect the AC output power cable and secure it using a socket wrench that has an extension rod.




 Verify that the AC output power cable is connected securely. Otherwise, the SUN2000 may fail to operate or experience any fault that will cause the damage of the terminal block.

For example, the SUN2000 may generate heat during operating due to unreliable connection.

 If the SUN2000 is insecurely installed and the AC output power cable bears the pulling force, ensure that the last cable bearing the force is the PE cable.

Figure 5-12 Connecting the AC output power cable (excluding the ground cable and neutral wire)




Figure 5-13 Connecting the AC output power cable (including the ground cable but excluding the neutral wire)

Figure 5-14 Connecting the AC output power cable (excluding the ground cable but including the neutral wire)




Figure 5-15 Connecting the AC output power cable (including the ground cable and neutral wire)

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

Step 5

Connect the conduit and fittings of the pipe.

Step 6

Check that the cables are connected correctly and securely. Then take appropriate measures to ensure that the pipe conduit and fittings are secured reliably, and seal the cable holes.

Step 7 Secure the AC filter using screws.

Step 8

Clear foreign matter from the maintenance compartment.

----End

5.4.2 Common Connection

Prerequisites

The AC output power cable and OT terminal are available.







Use a cable that can withstand 90°C (194°F) or 105°C (221°F). To facilitate the installation, you are advised to use cords.

If you connect a ground cable to the PE point on the chassis shell in the scenario with no neutral wire, you are advised to use a three-core (L1, L2, and L3) outdoor cable.

If you connect a ground cable to the PE point in the maintenance compartment in the scenario with no neutral wire, you are advised to use a four-core (L1, L2, L3, and PE) outdoor cable.



User Manual



5 Connecting Cables

If you connect a ground cable to the PE point on the chassis shell in the scenario with a neutral wire, you are advised to use a four-core (L1, L2, L3, and N) outdoor cable.

 If you connect a ground cable to the PE point in the maintenance compartment in the scenario with a neutral wire, you are advised to use a five-core (L1, L2, L3, N, and PE) outdoor cable.

Table 5-2 describes the cable specifications.

Table 5-2 Cable specifications

Cable Specifications Copper-Core Cable

Conductor cross-sectional area

Range

Recomm ended value

Cable outer diameter range supported by the AC OUTPUT waterproof connector

6–2/0 AWG

4 AWG

37–44 mm (1.46–1.73 in.)

Copper-Clad

Aluminum Cable or

Aluminum Alloy

Cable

4–2/0 AWG

2 AWG

 OT terminal: M8 (L1, L2, L3, and N) and M6 (PE)

Requirements for OT terminals:







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

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

If an aluminum alloy cable is used, use a copper to aluminum adapter terminal or an aluminum wiring terminal with a copper to aluminum adapter washer.




 Directly connecting an aluminum wiring terminal to the AC terminal block will cause electro-chemical corrosion and weaken the cable connection reliability.

 The copper to aluminum adapter terminal or an aluminum wiring terminal with a copper to aluminum adapter washer must comply with UL486-A and UL486-B.

 Do not mix up the aluminum and copper sides of the copper to aluminum adapter washer.

Ensure that the aluminum side of the washer contacts the aluminum wiring terminal, and the copper side contacts the AC terminal block.

Figure 5-16 Requirements for OT terminals

Procedure

Step 1

Remove an appropriate length of the jacket and insulation layer from the AC output power cable using a wire stripper.

Ensure that the jacket is in the maintenance compartment.



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Figure 5-17 Three-core cable (excluding the ground cable and neutral wire)

5 Connecting Cables

(A) Core wire (B) Insulation layer (C) Jacket

Figure 5-18 Four-core cable (including the ground cable but excluding the neutral wire)

Figure 5-19 Four-core cable (excluding the ground cable but including the neutral wire)



User Manual

Figure 5-20 Five-core cable (including the ground cable and neutral wire)

5 Connecting Cables

Step 2

Prepare the OT terminal.

Step 3 Route the cable through the waterproof connector.

Figure 5-21 Routing cables

Step 4

Connect the AC output power cable and secure it using a socket wrench that has an extension rod.




 Verify that the AC output power cable is connected securely. Otherwise, the SUN2000 may fail to operate or experience any fault that will cause the damage of the terminal block.

For example, the SUN2000 may generate heat during operating due to unreliable connection.

 If the SUN2000 is insecurely installed and the AC output power cable bears the pulling force, ensure that the last cable bearing the force is the PE cable.

Figure 5-22 Connecting the AC output power cable (excluding the ground cable and neutral wire)




Figure 5-23 Connecting the AC output power cable (including the ground cable but excluding the neutral wire)

Figure 5-24 Connecting the AC output power cable (excluding the ground cable but including the neutral wire)




Figure 5-25 Connecting the AC output power cable (including the ground cable and neutral wire)

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

Step 5 Tighten the waterproof connector to a torque of 7.5 N•m.

----End


Check that the cables are connected correctly and securely. Then seal the waterproof connectors and cable holes, and clear foreign matter from the maintenance compartment.

5.5 Connecting DC Input Power Cables

Prerequisites




 Before connecting DC input power cables, ensure that the DC voltage is within the safe range (lower than 60 V DC) and that the two DC switches on the SUN2000 are OFF.

Otherwise, the high voltage may result in electric shocks.

 When the SUN2000 is grid-tied, it is not allowed to maintain DC input power cables, such as connect or disconnect a string or a module in a string. Otherwise, electric shocks may occur.

Ensure that the following conditions are met. Otherwise, the SUN2000 will be damaged, or even a fire disaster will be caused.

 The highest open-circuit voltage of each PV string is always lower than or equal to 1000 V

DC.

 The positive and negative terminals of a PV module connect to the positive and negative

DC input terminals of the SUN2000 respectively.

 If the DC input power cable is reversely connected, do not operate the DC switches and positive and negative connectors immediately. Wait until the solar irradiance declines at night and the PV string current reduces to below 0.5 A. Then, turn off the two DC switches, remove the positive and negative connectors, and correct the polarity of the DC input power cable.

 Ensure that the PV module output is well insulated to ground. If the SUN2000 directly connects to the power grid with the neutral wire connected to the PE cable (for example, a low-voltage power grid or a power grid with the neutral wire grounded), do not ground the positive and negative terminals of PV strings. The device may be damaged if you do not follow the instruction. This damage is not covered under any warranty or service agreement.

 During the installation of PV strings and SUN2000, the positive or negative terminals of

PV strings may be grounded if power cables are not properly installed or routed. In this case, an AC or DC short circuit may occur and damage the SUN2000. The caused equipment damage is beyond the warranty scope.

Context

 DC terminal selection

Figure 5-26 shows the DC terminals at the bottom of the SUN2000. Table 5-3 describes

the requirements for DC terminal selection.

The SUN2000 provides two DC switches, namely, DC SWITCH 1 and DC SWITCH 2. DC SWITCH 1 controls the first to fourth sets of DC input terminals, whereas DC SWITCH 2 controls the fifth to eighth sets of DC input terminals.



User Manual

Figure 5-26 DC terminals

5 Connecting Cables

4

5

2

3

6

Table 5-3 DC terminal selection requirements

Number of Inputs SUN2000

1 Connects to any set.

7

8

Connects to sets 1 and 5.

Connects to sets 1, 3, and 5.

Connects to sets 1, 3, 5, and 7.

Connects to sets 1, 2, 3, 5, and 7.

Connects to sets 1, 2, 3, 5, 6, and 7.

Connects to sets 1, 2, 3, 4, 5, 6, and 7.

Connects to sets 1, 2, 3, 4, 5, 6, 7, and 8.

 DC input power cable specifications

Table 5-4 lists the recommended DC input power cable specifications.

Table 5-4 Recommended DC input power cable specifications

Cable Type Conductor Cross-Sectional Area

Range Recommended

Value

Common PV cables in the industry (model:

PV1-F)

12–10 AWG 12 AWG

Cable Outer

Diameter

4.5–7.8 mm

(0.18–0.31 in.)

Rigid cables, such as armored cables, are not recommended, because poor contact may be caused by the bending of the cables.



User Manual

Procedure

Step 1

Prepare positive and negative connectors.

5 Connecting Cables

Use the positive and negative metal contacts and DC connectors supplied with the SUN2000.

Using other models of positive and negative metal contacts and DC connectors may result in serious consequences. The caused device damage is not covered under any warranty or service agreement.

 After crimping the positive and negative metal contacts, pull the DC input power cables back to ensure that they are connected securely.

 Insert the crimped metal contacts of the positive and negative power cables into the appropriate positive and negative connectors. Then pull back the DC input power cables to ensure that they are connected securely.

 The Amphenol Helios H4 metal contacts supplied with the DC connectors are either cold forming contacts or stamping forming contacts. Choose the crimping tools that fit the metal contact types. Do not mix up the tools.

 Crimp the Amphenol Helios H4 metal cold forming contacts using crimping tool

UTXTC0005 (Amphenol, recommended) or H4TC0001 (Amphenol).

 Crimp the Amphenol Helios H4 metal stamping forming contacts using crimping tool

H4TC0003 (Amphenol, recommended), H4TC0002 (Amphenol), PV-CZM-22100

(Staubli), or PV-CZM-19100 (Staubli). When choosing PV-CZM-22100 or

PV-CZM-19100, do not use the locator. Otherwise, metal contacts would be damaged.

Figure 5-27 Crimping tool (H4TC0003)

(1) Locator




Figure 5-28 Preparing positive and negative connectors (using Amphenol Helios H4 metal cold forming contacts)




Figure 5-29 Preparing positive and negative connectors (using Amphenol Helios H4 metal stamping forming contacts)



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Figure 5-30 Preparing an MC4 connector

5 Connecting Cables

Step 2

Ensure that the DC input voltage of each PV string does not exceed 1000 V DC using a multimeter and check that the polarities of the DC input power cables are correct.





If the voltage is a negative value, the PV string is reversely connected. Correct the polarity.

If the voltage is greater than 1000 V DC, too many PV modules are configured. Remove some PV modules.



User Manual

Figure 5-31 Measuring the DC input voltage (Amphenol Helios H4)

5 Connecting Cables

Figure 5-32 Measuring the DC input voltage (MC4)

Before performing Step 3 , ensure that the two DC switches are OFF.

Step 3 Remove the dustproof cap, and insert the positive and negative connectors into the corresponding positive and negative DC input terminals of the SUN2000 until they snap into place.




After the positive and negative connectors snap into place, pull the DC input power cables back to ensure that they are connected securely.

Figure 5-33 Connecting the DC input power cable (Amphenol Helios H4)

Figure 5-34 Connecting the DC input power cable (MC4)




If the DC input power cable is reversely connected, do not operate the DC switches and positive and negative connectors immediately. Otherwise, the SUN2000 will be damaged. The caused equipment damage is beyond the warranty scope. Wait until the solar irradiance declines at night and the PV string current reduces to below 0.5 A. Then, turn off the two DC switches, remove the positive and negative connectors, and correct the polarity of the DC input power cable.

----End


Before removing the positive and negative connectors, ensure that the two DC switches are

OFF.

To remove the positive and negative connectors from the SUN2000, insert an open-end wrench into the notch and press the wrench with an appropriate force.

Figure 5-35 Removing a DC input connector (Amphenol Helios H4)

Figure 5-36 Removing a DC input connector (MC4)

If you replace the SUN2000 that uses the Amphenol Helios H4 DC terminal with the

SUN2000 that uses the MC4 DC terminal, you are advised to replace the DC input connector on the cable with the supplied MC4 DC input connector.



User Manual

5.6 Connecting Communications Cables

5.6.1 Communication Mode Description

5 Connecting Cables

RS485 Communication

The SUN2000 can connect to the SmartLogger over RS485 or to a PC through the

SmartLogger to implement communication. You can use the SUN2000 APP, SmartLogger, embedded WebUI, or the network management software (such as the NetEco) on the PC to query information about the SUN2000, such as energy yield, alarms, and running status.



Figure 5-37 shows the communication mode for a single SUN2000.

Figure 5-37 Communication mode for a single SUN2000



Figure 5-38 shows the communication mode for multiple SUN2000s.

If multiple SUN2000s are used, connect all the SUN2000s in daisy chain mode over an

RS485 communications cable.

Figure 5-38 Communication mode for multiple SUN2000s









The RS485 communication distance between the SUN2000 at the end of the daisy chain and the

SmartLogger cannot exceed 1000 meters.

If multiple SUN2000s need to communicate with one another and are connected to a PC over the

SmartLogger1000, a maximum of three daisy chains can be configured.

If multiple SUN2000s need to communicate with one another and are connected to a PC over the

SmartLogger2000, a maximum of six daisy chains can be configured.

To ensure the system response speed, it is recommended that the number of devices on each daisy chain be less than 30.




MBUS (PLC) Communication

The MBUS (PLC) communication board loads communication signals onto power cables for transmission.

The built-in MBUS (PLC) module in the SUN2000 does not need to be connected with cables.

Selecting a Communication Mode

The RS485 and MBUS (PLC) communication modes are mutually exclusive.

 If the MBUS (PLC) communication mode is selected, do not connect the RS485 communications cable. In addition, you need to set MBUS communication to Enable on the SUN2000 APP.

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

 If the RS485 communication mode is selected, you are advised to set MBUS communication to Disable .





MBUS communication is set to Enable by default.

You can set a single SUN2000 over the SUN2000 app or set multiple SUN2000s in batches over the

SmartLogger.

5.6.2 Selecting a Mode for Connecting RS485 Communications

Cables

Description





An RS485 communications cable can be connected in two ways:

− Terminal block connection

−

Recommended: outdoor communications cable with a conductor cross-sectional area of 18 AWG and an outer diameter range of 14 mm to 18 mm (0.55 in. to 0.71 in.)

RJ45 network port connection

Recommended: a CAT 5E outdoor shielded network cable with an outer diameter of less than 9 mm (0.35 in.) and internal resistance of less than or equal to 1.5 ohms/10 m (1.5 ohms/393.70 in.), as well as a shielded RJ45 connector

Select either connection way in practice. Connecting to a terminal block is recommended.

The RS485 communications cable can be connected in a common way or through a pipe.

Before installation, prepare materials based on the connection mode.

 If you choose connection through a pipe, ensure that the RS485 communications cable and 3/4–inch pipe are available.



User Manual



5 Connecting Cables

If you choose common connection, ensure that the RS485 communications cable is available.

When laying out communications cables, separate them from power cables and avoid large signal interference sources to protect communication from being affected.

Terminal Block Pin Definitions

Figure 5-39 shows an RS485 terminal block.

Figure 5-39 Terminal block

Table 5-5 describes pin definitions of the RS485 terminal block.

2

3

4

Table 5-5 Pin definitions of the RS485 terminal block

No. Port Definition Description

1 RS485A IN RS485A, RS485 differential signal +

RS485A OUT

RS485B IN

RS485B OUT

RS485A, RS485 differential signal +

RS485B, RS485 differential signal –


Figure 5-40 shows how to prepare an RS485 communications cable.



User Manual

Figure 5-40 Stripping an RS485 communications cable

5 Connecting Cables

RJ45 Connector Pin Definitions

Figure 5-41 shows an RJ45 connector.

Figure 5-41 RJ45 connector

Table 5-6 lists the RJ45 connector pin definitions.

6

7

4

5

Table 5-6 RJ45 connector pin definitions

Pin Color

1 White-and-orange

2

3

Orange

White-and-green

8

Blue

White-and-blue

Green

White-and-brown

Brown

Function



N/A



N/A

N/A

N/A

Figure 5-42 shows how to prepare an RS485 communications cable.



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Figure 5-42 Connecting wires to an RJ45 connector

5 Connecting Cables

(1) White-and-orange

(5) White-and-blue

(2) Orange

(6) Green

(3) White-and-green

(7) White-and-brown

(4) Blue

(8) Brown

5.6.3 Connecting RS485 Communications Cables Through a Pipe

Connecting Cables to the Terminal Block

Step 1

Install the pipe fittings.

1.


2.



Step 2

Route the communications cable through the conduit and then fittings of the pipe.




Step 3

Remove the cable terminal base from the terminal block. Connect the communications cables to the terminal base.

Figure 5-44 Connecting cables to a terminal base

(1) RS485A IN

(3) RS485B IN

(2) RS485A OUT

(4) RS485B OUT

Step 4

Install the terminal base on the terminal block, and connect the shield layers to the ground point.

When connecting the shielded cables, choose whether to crimp the OT terminal based on site requirements.

Figure 5-45 Connecting communications cables



User Manual

Step 5

Bind communications cables after connecting them.

Figure 5-46 Binding communications cables

5 Connecting Cables

Step 6


----End

Connecting a Cable to the RJ45 Network Port

Step 1

Install the pipe fittings.

1.


2.




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5 Connecting Cables

Step 2

Route the communications cable through the conduit and then fittings of the pipe.

Step 3

Insert the RJ45 connectors into the RJ45 network ports in the SUN2000 maintenance compartment.




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Step 4



5 Connecting Cables

Step 5


----End


Check that the cables are connected correctly and securely. Then take appropriate measures to ensure that the pipe conduit and fittings are secured reliably, and seal the cable holes. Clear foreign matter from the maintenance compartment.

5.6.4 Connecting the RS485 Communications Cable in a Common

Way

Connecting Cables to the Terminal Block

Step 1

Route the communications cables through the waterproof connectors.



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5 Connecting Cables

Step 2

Remove the cable terminal base from the terminal block. Connect the communications cables to the terminal base.

Figure 5-51 Connecting cables to a terminal base

(1) RS485A IN

(3) RS485B IN

(2) RS485A OUT

(4) RS485B OUT

Step 3 Install the terminal base on the terminal block, and connect the shield layers to the ground point.

When connecting the shielded cables, choose whether to crimp the OT terminal based on site requirements.



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5 Connecting Cables

Step 4





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Step 5 Tighten the waterproof connectors to a torque of 7.5 N•m.

----End

Connecting Cables to the RJ45 Network Port

Step 1

Route the communications cables through the waterproof connector.


5 Connecting Cables

Step 2 Insert the RJ45 connectors into the RJ45 network ports in the SUN2000 maintenance compartment.



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5 Connecting Cables

Step 3





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Step 4

Tighten the waterproof connector to a torque of 7.5 N•m.

----End

5 Connecting Cables


Check that the cables are connected correctly and securely. Then seal the waterproof connectors and cable holes, and clear foreign matter from the maintenance compartment.

5.7 Closing the Maintenance Compartment Door

Procedure

Step 1

Install the AC terminal cover.

Figure 5-57 Installing a cover

Step 2

Adjust the support bar.



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Figure 5-58 Adjusting a support bar

5 Connecting Cables

Step 3

Close the maintenance compartment door and tighten the two screws on the door.

Figure 5-59 Tightening screws on the maintenance compartment door





If a screw on the maintenance compartment door is missing, use the unused ground screw on the chassis shell as a standby screw.

If the floating nut used for securing the maintenance compartment door is missing, use the standby

floating nut shown in Figure 5-60 .



User Manual

Figure 5-60 Removing a standby floating nut

5 Connecting Cables

----End



User Manual 6 System Commissioning

6

System Commissioning

6.1 Checking Before Power-On

1.

The SUN2000 is installed correctly and securely.

2.

Check that the two DC switches at the bottom of the SUN2000 and the downstream AC output switch are OFF.

3.

No connected cable is damaged.

4.

Ground cables are connected securely, without open circuits or short circuits.

5.

AC output power cables are connected correctly and securely, without open circuits or short circuits.

6.

DC input power cables are connected correctly and securely, without open circuits or short circuits.

7.

The communications cables are connected correctly and securely.

8.

Check that all pipes and the waterproof connectors in use at the bottom of the chassis are sealed.

9.

The AC terminal cover is reinstalled.

10.

Check that the maintenance compartment is clean and tidy, without foreign matter.

11.

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

12.

Idle DC input terminals are sealed.

13.

The idle USB port is plugged with cover.

14.

Idle RESERVE and COM waterproof connectors are plugged and the locking caps are tightened.

6.2 Powering On the SUN2000

Prerequisites

Before turning on the AC switch between the SUN2000 and the power grid, use a multimeter 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.




If you perform Step 2

before Step 1 , the SUN2000 reports a fault about abnormal shutdown.

The SUN2000 can start normally after the fault is automatically rectified. The default alarm clearance time is 1 minute. You can modify the time over the NMS software installed on the

PC that connects to the SUN2000.

Step 2

Turn on the DC switches at the bottom of the SUN2000 chassis.

Step 3

(Optional) Measure the temperatures at the joints between DC terminals and connectors using a point-test thermometer.

To ensure that the DC terminals are in good contact, check the temperatures at the joints between DC terminals and connectors after the SUN2000 has been running for a period of time. Ensure that the temperature rise does not exceed 40°C (104°F).

Step 4

Connect a mobile phone that runs the SUN2000 app to the inverter using a Bluetooth module, a WLAN module, or a USB data cable.

The screen snapshots in this document correspond to app 2.2.00.050.

Figure 6-1 WLAN or Bluetooth connection (Android and iOS)

(A) Inverter (B) WLAN module/Bluetooth module (C) Mobile phone

Purchase the WLAN module/Bluetooth module bundled with the SUN2000. A WLAN module/Bluetooth module purchased from any other source may not support communication between the SUN2000 and the app.



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Figure 6-2 Data cable connection (Android)

6 System Commissioning

(C) Mobile phone (A) Inverter (B) USB data cable

Use the USB data cable delivered with the mobile phone. The port type of the USB data cable connected to the SUN2000 is USB 2.0.

Figure 6-3 Login screen



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Figure 6-4 Selecting a connection mode








When the WLAN connection is used, the initial name of the WLAN hotspot 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.

After you select Use by default for this USB accessory , the message will not appear if you connect the app to the inverter again without removing the USB data cable.

Step 5

Tap the user name area to switch between the common user, advanced user, and special user.



User Manual

Figure 6-5 Switching between users










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

The initial password for Common User , Advanced User , and Special User is 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 an incorrect password is entered for five consecutive times (the interval between two consecutive invalid password entries is less than 2 minutes), the account will be locked for 10 minutes. The password consists of six digits.

Step 6 Enter the password and tap Log In .

Step 7 After the successful login, the Quick Settings screen or Function Menu screen is displayed.





If you log in to the app after the device connects to the app for the first time or factory defaults are restored, the Quick Settings screen will be displayed on which you can set basic parameters. After the settings take effect, you can enter the main menu screen and modify the parameters on the

Settings screen. By default, the SUN2000 can be grid-tied and you do not have to set parameters.

You are advised to log in to the Quick Settings screen as an advanced user for parameter settings.



User Manual

Figure 6-6 Quick Settings screen (logging in as an advanced user)












Set the power grid code that applies to the country or region where the power station is located and the inverter model.

If you change the grid code, some parameters may be restored to factory defaults. After the grid code is changed, check whether the previously set parameters are affected.

Set user parameters based on the current date and time.

Set Baud rate , RS485 protocol , and Com address based on site requirements. Baud rate can be set to 4800 , 9600 , or 19200 . RS485 protocol can be set to MODBUS RTU , and Com address can be set to any value in the range of 1 to 247.

When multiple inverters communicate with the SmartLogger over RS485, the addresses for all the inverters on each RS485 route must be within the address range set on the SmartLogger and cannot be duplicate. Otherwise, the communication will fail. In addition, the baud rates of all the inverters on each RS485 route must be consistent with the SmartLogger baud rate.



User Manual

Figure 6-7 Function Menu screen


----End

6.3 Powering Off the SUN2000

Context

 If two SUN2000s share the same AC switch on the AC side, power off the two SUN2000s.

 After the SUN2000 powers off, the remaining electricity and heat may still cause electric shocks and body burns. Therefore, put on protective gloves and begin servicing the

SUN2000 five minutes after the power-off.

Procedure

Step 1

Run a shutdown command on the SUN2000 APP, SmartLogger, or NMS.

For details, see the SUN2000 APP User Manual , SmartLogger1000 User Manual ,

SmartLogger2000 User Manual , or iManager NetEco 1000S User Manual .

Step 2

Turn off the AC switch between the SUN2000 and the power grid.

Step 3

Set the two DC switches to OFF.

Step 4 (Optional) Install locks on the DC switches.




Turn off the DC switches. To prevent turning on the switches by mistake, you are advised to lock the DC switches.

Figure 6-8 Installing locks

----End



User Manual 7 Man-Machine Interactions

7

Man-Machine Interactions

7.1 Operations with a USB Flash Drive

USB flash drives of SanDisk, Netac, and Kingston are recommended. Other brands may be incompatible.

7.1.1 Exporting Configurations

Procedure

Step 1

Generate a boot script file by choosing Tool Kit > Local maintenance script > Inverter maint script > Inverter Command Settings on the SUN2000 app. For details, see the

SUN2000 APP User Manual .

Step 2 Import the boot script file to a PC.

(Optional) The boot script file can be opened as a .txt file, as shown in Figure 7-1 .

Figure 7-1 Boot script file



User Manual

No.

1

2

3

4

Meaning

User name

Ciphertext

Script validity period

Command

7 Man-Machine Interactions

Remarks





Advanced user: engineer

Special user: admin

The ciphertext varies depending on the login password of the

SUN2000 APP.

The script validity period varies depending on the script export time.

Different command settings can produce different commands.

 Configuration export command: export param .

 Configuration import command: import param .





Data export command: export log .

Upgrade command: upgrade .

Step 3

Import the boot script file to the root directory of a USB flash drive.

Step 4 Connect the USB flash drive to the USB port. The system automatically identifies the USB flash drive and executes all commands specified in the boot script file. View the LED indicator to determine the operating status.

Verify that the ciphertext in the boot script file matches the login password of the SUN2000

APP. If they do not match and you insert the USB flash drive for five consecutive times, the user account will be locked for 10 minutes.

Table 7-1 LED indicator description

LED Indicator Status

Green off

Blinking green at long intervals (on for 1s and then off for 1s)

Blinking green at short intervals (on for 0.125s and then off for 0.125s)

Steady green

Meaning

There is no operation with a USB flash drive.

There is an operation with a USB flash drive.

An operation with a USB flash drive has failed.

An operation with a USB flash drive is successful.

Step 5

Insert the USB flash drive into a computer and check the exported data.

When the configuration export is complete, the boot script file and exported file are in the root directory of the USB flash drive.



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----End


7.1.2 Importing Configurations

Prerequisites

A complete configuration file has been exported.

Procedure

Step 1 Generate a boot script file by choosing Tool Kit > Local maintenance script > Inverter maint script > Inverter Command Settings on the SUN2000 app. For details, see the


Step 2

Import the boot script file to a PC.

Step 3

Replace the exported boot script file in the root directory of the USB flash drive with the imported one.

Replace the boot script file only and keep the exported files.

Step 4

Connect the USB flash drive to the USB port. The system automatically identifies the USB flash drive and executes all commands specified in the boot script file. View the LED indicator to determine the operating status.





Green off



Steady green

Meaning





----End



User Manual

7.1.3 Exporting Data


Procedure

Step 1

Generate a boot script file by choosing Tool Kit > Local maintenance script > Inverter maint script > Inverter Command Settings on the SUN2000 app. For details, see the


Step 2 Import the boot script file to the root directory of a USB flash drive.

Step 3






Green off



Steady green

Meaning





Step 4

Insert the USB flash drive into a PC and check the exported data.

After the data is exported, the boot script file and exported file are in the root directory of the USB flash drive.

----End

7.1.4 Upgrading

Procedure

Step 1

Obtain the required upgrade package from Huawei technical support website (for example,

SUN2000 V200R002C20SPC XXX ).

Step 2

Decompress the upgrade package.



User Manual 7 Man-Machine Interactions

After obtaining the upgrade package SUN2000V200R002C20SPCXXX _package.zip, decompress it and ensure that the extracted files include:















 config.txt sun_lmt_mgr_cmd.emap (This is a boot script file.)

SUN2000.bin

SUN2000_CPLD.bin

SUN2000_FLT_Release.bin

SUN2000_Master_Release.bin

SUN2000_Slave_Release.bin vercfg.xml

 When the login password of the SUN2000 APP is the initial password ( 00000a ), there is

no need to perform Step 3

–

Step 5 .



When the login password of the SUN2000 APP is not the initial password, perform Step

3 – Step 7 .

Step 3 Generate a boot script file by choosing Tool Kit > Local maintenance script > Inverter maint script > Inverter Command Settings on the SUN2000 app. For details, see the


Step 4

Import the boot script file to a computer.

Step 5

Replace the boot script file in the upgrade package with the one generated by the SUN2000

APP.

Step 6 Copy the extracted files to the root directory of the USB flash drive.

Ensure that all upgrade files are copied to the root directory of the USB flash drive.

Step 7






Green off

Meaning


Blinking green at long intervals (on There is an operation with



User Manual

LED Indicator Status for 1s and then off for 1s)


Steady green


Meaning a USB flash drive.



Step 8 (Optional) The system automatically restarts when the upgrade is completed. All LED indicators turn off during the restart. After the restart, the green indicator is blinking at long intervals (on for 1s and then off for 1s) for 1 minute until it becomes steady on, which indicates that the upgrade is successful.

The SUN2000 can also be upgraded through the Inverter Update in the SUN2000 APP. For details, see the SUN2000 APP User Manual .

----End

7.2 Operations with a SmartLogger

For operations with a SmartLogger, see the SmartLogger1000 User Manual or

SmartLogger2000 User Manual .

7.3 Operations with the NMS

For operations with the NMS, see the iManager NetEco 1000S User Manual .

7.4 Operations with the SUN2000 APP

For operations with the SUN2000 APP, see the SUN2000 APP User Manual .



User Manual 8 Maintenance

8

Maintenance

8.1 Routine Maintenance

To ensure that the SUN2000 can operate properly for a long term, you are advised to perform routine maintenance on it as described in this chapter.

 Before cleaning the system, and maintaining the cable connections and grounding

reliability, power off the system (see 6.3 Powering Off the SUN2000 ) and ensure that the

two DC switches on the SUN2000 are OFF.

 If you need to open the maintenance compartment door in rainy or snowy days, take protective measures to prevent rain and snow entering the maintenance compartment. If it is impossible to take protective measures, do not open the maintenance compartment door in rainy or snowy days.

Table 8-1 Maintenance list

Item Check Method

System cleanliness Check the heat sink for foreign matter or the overall health of the SUN2000.

System running status

Check the SUN2000 for damage or deformation.

Cable connections  Check that cables are securely connected.

 Check that cables are intact, in particular, the parts touching the metallic surface are not scratched.





Check that the cover on the USB port is tightened.

Check that idle RESERVE and

COM waterproof connectors are plugged and the locking caps are tightened.

Maintenance Interval

Annual or every time an abnormality is detected

Annual

The first inspection is half a year after the initial commissioning.

From then on, perform the inspection once six months to a year.



User Manual

Item

Grounding reliability

Sealing

Check Method

Check whether the ground terminal and ground cable are securely connected.

Check whether all cable glands are properly sealed.

8 Maintenance

Maintenance Interval

Annual

Annual

8.2 Troubleshooting

Alarm severities are defined as follows:







Major: The SUN2000 enters the shutdown mode and disconnects from the power grid to stop generating electricity after a fault occurs.

Minor: Some components are faulty but the SUN2000 can still generate electricity.

Warning: The SUN2000 output power decreases due to external factors.

Table 8-2 Common alarms and troubleshooting measures

Alarm ID Alarm

Name

Alarm

Severity

Possible Cause

103 High DC

Input

Voltage

Major 





Cause ID = 1

The PV array is not properly configured.

Excessive PV modules are connected in series to PV strings 1 and 2, and therefore the PV string open-circuit voltage exceeds the maximum value of the inverter MPPT voltage.

Cause ID = 2



Cause ID = 3


Excessive PV modules are connected in series to PV

Suggestion

 Cause ID = 1

Reduce the number of PV modules connected in series to

PV strings 1 and 2 until the open-circuit voltage is less than or equal to the maximum inverter input voltage. After the PV array configuration is corrected, the

SUN2000 alarm disappears.

 Cause ID = 2




 Cause ID = 3






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Alarm ID Alarm

106–113

120–127

Name

Abnormal

String 1–8

String 1–8

Reversed

8 Maintenance

Alarm

Severity

Possible Cause Suggestion

 strings 5 and 6, and therefore the PV string open-circuit voltage exceeds the maximum value of the inverter MPPT voltage.

Cause ID = 4



 Cause ID = 4




Warning Cause ID = 1

Cause ID

= 1:

Major

Cause ID

= 2:

Warning





The PV string is shielded from sunlight for a long time.

The PV string deteriorates or is damaged.

 Cause ID = 1

The PV string is reversely connected.

 Cause ID = 2

Only a few PV modules are connected in series to the

PV string, and therefore the end voltage is lower than that of other PV strings.

1.

Check whether the PV string current is obviously lower than the currents of other PV strings.

2.

If yes, check whether the PV string is shielded from sunlight.

3.

If the PV string is clean and not shielded from sunlight, check whether any PV module is faulty.





Cause ID = 1

Check whether the PV string is reversely connected to the

SUN2000. If yes, wait until the solar irradiance declines at night and the PV string current reduces to below 0.5 A. Then, turn off the two DC switches and correct the

PV string connection.

Cause ID = 2

Check whether the number of PV modules connected in series to the SUN2000 is small. If yes, increase the number.

200 Abnormal

DC Circuit

Major Abnormal external conditions trigger the protection for the

DC circuit inside the

SUN2000. The possible causes are as follows:

 Cause ID = 3

The SUN2000 input is disconnected accidentally, or the PV string output

Cause ID = 3/10/11

1.

The SUN2000 detects its external working conditions in real time.

After the fault is rectified, the

SUN2000 automatically recovers.

2.

If the alarm persists, contact

Huawei technical support.

Cause ID = 12/15



User Manual

Alarm ID Alarm

Name

8 Maintenance

Alarm

Severity








 power changes sharply because the PV string is shielded from sunlight.

Cause ID = 10

The three phases of the power grid are seriously unbalanced, which triggers the protection for the internal control circuit of the SUN2000.

Cause ID = 11

The grid voltage changes sharply and the SUN2000 input power fails to discharge in a short time, which increases the internal voltage and triggers overvoltage protection.

Cause ID = 12/15

An unrecoverable fault occurs on a circuit inside the SUN2000.

Cause ID = 16

The voltage between the input PV string and the ground is abnormal, and there is a risk of power attenuation.

Turn off the AC output switch and then the DC input switch. After 5 minutes, turn them on in the same sequence. If the fault persists, contact Huawei technical support.

Cause ID = 16

1.

If there is no PID compensation device in the system, set

Reactive power output at night and PID protection at night of the SUN2000 to Disable .

2.

If there is a PID compensation device in the system, check whether it is faulty. If so, rectify the fault.

3.

Check whether PID compensation direction

( Crystalline silicon PV compensation mode ) of the

SUN2000 and PV module compensation voltage direction of the PID module are correctly set based on the PV module model. If not, reset them.

4.



202 Abnormal

Invert

Circuit

Major Abnormal external conditions trigger the protection for the inverter circuit inside the

SUN2000. The possible causes are as follows:

 Cause ID = 13



The grid voltage drops dramatically or the power grid is short-circuited, which damages the internal voltage detection circuit in the SUN2000.

Cause ID = 14

The grid voltage drops dramatically or the power grid is short-circuited. As a result, the inverter transient output current exceeds the upper threshold and therefore the inverter

Cause ID = 13/14/16

1.

The inverter detects its external working conditions in real time.

After the fault is rectified, the

SUN2000 automatically recovers.

2.



Cause ID = 20

1.

Check the inverter output cable for short-circuits.

2.





User Manual

Alarm ID Alarm

301

Name

Abnormal

Grid

Voltage

8 Maintenance

Alarm

Severity

Possible Cause



 protection is triggered.

Cause ID = 16

The DC current in the power grid exceeds the upper threshold.

Cause ID = 20

The inverter output is short-circuited. As a result, the output current surges to a value above the upper limit, and the inverter protection is triggered.

Major

Suggestion

The grid voltage is beyond the acceptable range. The possible causes are as follows:

 Cause ID = 4

The grid voltage is below the specified lower threshold.





Cause ID = 16

The grid voltage exceeds the specified upper threshold.

Cause ID = 19

The grid voltage has exceeded the specified upper threshold for 10 minutes.









Cause ID = 26

The grid voltage exceeds the specified upper threshold.

Cause ID = 28

The three phases of the power grid differ greatly in voltage.

Cause ID = 29

1.

The power grid experiences an outage.

2.

The AC circuit is disconnected or AC switch is OFF.

Cause ID = 31/32/33

The impedance of the output phase wire A (cause

Cause ID = 4

1.

If the alarm occurs accidentally, the power grid may be abnormal temporarily. The SUN2000 automatically recovers after detecting that the power grid becomes normal.

2.

If the alarm occurs frequently, check whether the grid voltage is within the acceptable range. If no, contact the local power operator. If yes, log in to the

SUN2000 app, SmartLogger, or

NMS to modify the grid overvoltage and undervoltage protection thresholds with the consent of the local power operator.

3.

If the fault persists for a long time, check the AC switch and

AC output power cable.

Cause ID = 16/19/26

1.

Check whether the grid-tied voltage exceeds the upper threshold. If yes, contact the local power operator.

2.

If you have confirmed that the grid-tied voltage exceeds the upper threshold and obtained the consent of the local power operator, modify the overvoltage and undervoltage protection thresholds.

3.

Check whether the peak grid voltage exceeds the upper threshold.



User Manual

Alarm ID Alarm

Name

8 Maintenance

Alarm

Severity


ID = 31)/B (cause ID =

32)/C (cause ID = 33) to the

PE cable is low or short-circuited.

Cause ID = 28

1.

If the exception is caused by an external fault, the SUN2000 automatically recovers after the fault is rectified.

2.

If the alarm persists and affects the energy yield of the power station, contact the local power operator.

Cause ID = 29

1.

Check the AC voltage.

2.

Check that the AC power cable is securely connected and that the

AC switch is ON.

Cause ID = 31/32/33

Check the impedance of output phase wire A (cause ID = 31)/B

(cause ID = 32)/C (cause ID = 33) to the PE cable and locate the position with lower impedance and resolve the issue.

305 Abnormal

Grid

Frequency

Major 





Cause ID = 2

The actual grid frequency is higher than the standard requirement for the local power grid.

Cause ID = 4

The actual grid frequency is lower than the standard requirement for the local power grid.

Cause ID = 5

The actual change rate of the grid frequency does not meet the standard requirement for the local power grid.

Cause ID = 2/4

1.


2.

If the alarm occurs frequently, check whether the grid frequency is within the acceptable range. If no, contact the local power operator. If yes, log in to the

SUN2000 app, SmartLogger, or

NMS to modify the grid overfrequency and underfrequency protection thresholds with the consent of the local power operator.

Cause ID = 5

1.


2.

If the alarm occurs frequently, check whether the grid frequency




Alarm ID Alarm

313

318

321

326

Name

Low

Insulation

Resistance

Abnormal

Residual

Current

Cabinet

Overtempe rature

Abnormal

Grounding

Alarm

Severity

Possible Cause

Major

Major

Major

Major

Suggestion

Cause ID = 1

 A short circuit occurs between the PV string and the PGND cable.

 The PV string is installed in a moist environment for a long time.

Cause ID = 1

The insulation resistance against the PGND cable at the input side decreases when the

SUN2000 is running, which causes an excessively high residual current.

Cause ID = 1

 The SUN2000 is installed in a place with poor ventilation.





The ambient temperature exceeds the upper threshold.

The internal fan works abnormally.

Cause ID = 1





The neutral wire or PGND cable does not connect to the SUN2000.

The SUN2000 output side does not connect to an isolation transformer when the PV string output is grounded. is within the acceptable range. If no, contact the local power operator.

1.

Check the impedance between the PV string and the PGND cable. If a short circuit occurs, rectify the fault.

2.

If you are sure that the impedance is less than the default value in a cloudy or rainy environment, log in to the SUN2000 app,

SmartLogger, or NMS and set

Insulation resistance protection .

1.

If the alarm occurs accidentally, the external circuit may be abnormal temporarily. The

SUN2000 automatically recovers after fault is rectified.

2.

If the alarm occurs repeatedly or persists, check whether the impedance between the PV string and the ground is excessively low.

1.

Check the ventilation and ambient temperature of the

SUN2000 installation position.

2.

If the ventilation is poor or the ambient temperature exceeds the upper threshold, improve the ventilation and heat dissipation.

3.

If the ventilation and ambient temperature both meet requirements, contact Huawei technical support.

1.

Check that the neutral wire or

PGND cable properly connects to the inverter.

2.

If the PV string output is grounded, check that the

SUN2000 output side connects to an isolation transformer.

400 System

Fault

Major Cause ID = 1/3/21/23/27

An unrecoverable fault occurs on a circuit inside the

SUN2000.

Turn off the AC output switch and

DC input switch. Then turn on the

AC output switch and DC input switch after 5 minutes. If the fault



User Manual

Alarm ID Alarm

410

411

412

Name

Abnormal

Auxiliary

Power

AFCI

Self-Chec k Failure

DC Arc

Fault

8 Maintenance

Alarm

Severity

Possible Cause

Major

Major

Major

Suggestion

Cause ID = 1/2/3/4

The PV string cable is in poor contact or with open circuits. persists, contact Huawei technical support.

Cause ID = 4

The sampling control board has an abnormal voltage, which may be caused by the following:

 The internal power chip of the sampling control board is faulty.

 The detection circuit becomes faulty.

1.

When the alarm is generated, the

SUN2000 shuts down automatically. When the fault is rectified, the SUN2000 starts automatically.

2.



Cause ID = 1/2/3

AFCI check fails.

1.

Turn off the AC output switch and DC input switch. Then turn on the AC output switch and DC input switch after 5 minutes. If the fault persists, contact Huawei technical support.

2.

Disable the AFCI function if you are sure not to use it.

Check whether the PV string cable is in poor contact or with open circuits.

If yes, reconnect the cable.

504

505

Software

Version

Unmatch

Upgrade

Failed

Minor

Major

Cause ID = 1/2/3

During inverter software upgrade, the version of the software loaded is incorrect.

Cause ID = 1

The upgrade does not end normally.

Check whether you have performed a software upgrade recently. If yes, upgrade the software to the correct version again.

Perform the upgrade again.

506 License

Expired

1.

Apply for a license.

2.

Load the new license.

61440 Flash

Fault

Warning Cause ID = 1

1.

The license has entered its grace period.

2.

The license will expire soon.

Minor Cause ID = 1

 The flash memory is insufficient.

 The flash memory has bad sectors.

1.

Replace the monitoring board.

2.

If the monitoring board is built into the monitoring device, replace the monitoring device.




If you cannot rectify faults with the measures listed in the preceding table, contact Huawei technical support.



User Manual 9 Handling the SUN2000

9

Handling the SUN2000

9.1 Removing the SUN2000

Before removing the SUN2000, disconnect both the AC and DC power supplies. For

processes of disconnecting the power supplies, see 6.3 Powering Off the SUN2000 . After

powering off the SUN2000, wait at least 5 minutes before performing operations on it.

Perform the following operations to remove the SUN2000:

1.

Disconnect all cables from the SUN2000, including RS485 communications cables, DC input power cables, AC output power cables, and ground cables.

2.

Remove the SUN2000 from the mounting bracket.

3.

Remove the mounting bracket.

9.2 Packing the SUN2000





If the original packing materials are available, put the SUN2000 inside them and then seal them by using adhesive tape.

If the original packing materials are not available, put the SUN2000 inside a suitable cardboard box and seal it properly.

9.3 Disposing of the SUN2000

If the SUN2000 service life expires, dispose of it according to the local disposal rules for electrical equipment waste.



User Manual 10 Technical Specifications

10

Technical Specifications

Efficiency

Item

Maximum conversion efficiency

CEC efficiency

SUN2000-33KTL-

US

98.9%

SUN2000-36KTL-

US

SUN2000-40KTL-

US

98.5%

Input

Item SUN2000-33KTL-

US

37,500 W Maximum input power

Maximum input voltage

1000 V

MPPT voltage range 200–1000 V

Lowest operating/startup voltage

200 V/250 V

MPPT voltage range at full load

460–850 V

Rated input voltage 720 V

Maximum input current (per MPPT)

22 A

Maximum short-circuit current

(per MPPT)

30 A

SUN2000-36KTL-

US

41,000 W

490–850 V

SUN2000-40KTL-

US

45,100 W

530–850 V



User Manual

Item

Maximum inverter backfeed current to the PV array

Number of inputs

Number of MPP trackers

8

4

SUN2000-33KTL-

US

0 A

SUN2000-36KTL-

US

10 Technical Specifications

SUN2000-40KTL-

US

Output


US

Rated active power 33,300 W

Maximum apparent power

36,600 VA

SUN2000-36KTL-

US

36,000 W

40,000 VA

Maximum active power (cosφ = 1)

36,600 W 40,000 W

Rated output voltage 277 V/480 V, 3W+PE/3W+N a +PE

Rated output current

Maximum output current

Adapted grid frequency

40.1 A

44.1 A

60 Hz

43.4 A

48.2 A

SUN2000-40KTL-

US

40,000 W

44,000 VA

44,000 W

48.2 A

53 A

Power factor

Maximum total harmonic distortion

(rated power)

0.8 leading ... 0.8 lagging

< 3%

Note a: Choose whether to connect the neutral wire based on the application scenario.

When the SUN2000 is used in a scenario with the neutral wire, you need to set Output mode to Three-phase, four-wire on the SUN2000 app, SmartLogger, or NMS.

Protection


US

Supported

SUN2000-36KTL-

US

SUN2000-40KTL-

US

Anti-islanding protection

Input DC switch Supported



User Manual


US

Supported

SUN2000-36KTL-

US

Output overcurrent protection

Input reverse connection protection

PV string fault detection

Supported

Supported

DC surge protection Type II

AC surge protection Type II

Insulation resistance detection

Supported

Supported Residual current monitoring unit

(RCMU)

AFCI Supported (UL 1699B, Type I)


SUN2000-40KTL-

US

Communication

Item

Display

RS485

MBUS (PLC)

SUN2000-33KTL-

US

SUN2000-36KTL-

US

SUN2000-40KTL-

US

LED indicator, Bluetooth module+app, USB data cable+app, and

WLAN module+app

Supported

Supported

Common Parameters

Item

Dimensions (W x H x D)

Net weight

Operating temperature

Cooling mode

SUN2000-33KTL-

US

SUN2000-36KTL-

US

SUN2000-40KTL-

US

Including the mounting plate: 930 mm x 550 mm x 283 mm (36.61 in. x 21.65 in. x 11.14 in.)

Excluding the mounting plate: about 60 kg (132.28 lb)/Including the mounting plate: about 62 kg (136.69 lb)

–25°C to +60°C (–13°F to +140°F)

Natural convection



User Manual

Item

Humidity

Input terminal

Output terminal

Ingress Protection

Rating

Topology

SUN2000-33KTL-

US

0%–100% RH

SUN2000-36KTL-

US

Amphenol Helios H4 or MC4

Waterproof cable connector+OT terminal

Type 4X


SUN2000-40KTL-

US

Transformerless



User Manual A Grid Codes

A

Grid Codes

Set the grid code that applies to the country or region where the PV plant is located.

Table A-1 Grid codes

No. Grid Code

6

7

8

1

2

3

4

5

IEEE 1547-MV480

IEEE 1547a-MV480

PRC_024_ERCOT-MV480

PRC_024_Eastern-MV480

PRC_024_Western-MV480

PRC_024_Quebec-MV480

ELECTRIC RULE NO.21-MV480

HECO-MV480

Description

US medium-voltage power grid

2016 US medium-voltage power grid

Texas medium-voltage power grid

Eastern US medium-voltage power grid

Western US medium-voltage power grid

Quebec medium-voltage power grid

California medium-voltage power grid

Hawaii medium-voltage power grid

The grid codes are subject to change. The listed codes are for reference only.



User Manual B Contact Information

B

Contact Information

If you need to consult any technical problem, dial the Huawei technical assistance center

(TAC). Please provide the following information to receive better service.

































Customer Name

Contact Info

Project Name and Location

Project Scale

Project Grid-connection Time

Fault Occurrence Time

Quantity of Faulty Inverters

Inverter Model

SN

Inverter Firmware Version

Warranty Info

Problem Description

SmartLogger Model

SmartLogger Firmware Version

SmartLogger Networking Scenarios (Such as Optical Fiber + RS485/MBUS (PLC)

Networking)

RMA Shipping Address

Email: [email protected]



User Manual C Acronyms and Abbreviations

Issue 07 (2019-06-20)

L

LED

M

MBUS

MPP

MPPT

N

NMS

A

ACDU

AFCI

C

CCO

CEC

E

EFUP

C

Acronyms and Abbreviations

AC distribution unit arc-fault circuit interrupter central controller

California Energy

Commission environmentally friendly use period light emitting diode monitoring bus maximum power point maximum power point tracking network management system

Copyright © Huawei Technologies Co., Ltd. 117


User Manual

P

PID

PLC

PV

R

RCMU

T

THD

W

WEEE potential induced degradation power line communication photovoltaic residual current monitoring unit total harmonic distortion waste electrical and electronic equipment

C Acronyms and Abbreviations


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