Huawei SUN2000-2KTL-L1, SUN2000-3KTL-L1, SUN2000-3.68KTL-L1, SUN2000-4KTL-L1, SUN2000-4.6KTL-L1 User guide

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SUN2000-(2KTL-6KTL)-L1

User Manual

Issue 06

Date 2021-12-20

HUAWEI TECHNOLOGIES CO., LTD.

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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 specied 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 eort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang Shenzhen 518129 People's Republic of China

Website: https://e.huawei.com

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SUN2000-(2KTL-6KTL)-L1 User Manual About This Document

About This Document

Purpose

This document describes the SUN2000-(2KTL-6KTL)-L1 (SUN2000 for short) in terms of its installation, electrical connection, commissioning, maintenance, and troubleshooting. Before installing and operating the SUN2000, ensure that you are familiar with the features, functions, and safety precautions provided in this document.

Intended Audience

This document is applicable to:

● Installers

● Users

Symbol Conventions

The symbols that may be found in this document are

Symbol

dened as follows.

Description

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

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

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

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

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

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SUN2000-(2KTL-6KTL)-L1 User Manual About This Document

Symbol Description

Supplements the important information in the main text.

NOTE is used to address information not related to personal injury, equipment damage, and environment deterioration.

Change History

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

Issue 06 (2021-12-20)

● Updated 7.1.3 Creating a PV Plant and a User.

● Updated 7.2.1 Energy Control.

● Updated 10.1 SUN2000 Technical

Specications.

Issue 05 (2021-08-10)

● Updated 5.6 Connecting DC Input Power Cables.

● Updated 5.7 (Optional) Connecting Battery Cables.

● Updated 5.8 (Optional) Connecting Signal Cables.

● Updated 7.1 App Commissioning.

● Updated 7.2.1.3 Battery Control.

● Updated B Device Commissioning.

● Updated D Rapid Shutdown.

Issue 04 (2021-04-01)

● Updated 5.1 Preparing Cables.

● Updated 6.2 System Power-On.

● Updated 8.3 Troubleshooting.

Issue 03 (2020-09-15)

● Updated 5.2 Connecting PE Cables.

● Updated 8.3 Troubleshooting.

Issue 02 (2020-06-09)

● Updated 4.2 Preparing Tools and Instruments.

● Updated 5.1 Preparing Cables.

● Updated 5.6 Connecting DC Input Power Cables.

● Updated 5.8 (Optional) Connecting Signal Cables.

● Updated 7.1.4 (Optional) Setting the Physical Layout of the Smart PV

Optimizers.

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SUN2000-(2KTL-6KTL)-L1 User Manual About This Document

● Updated C Resetting Password.

Issue 01 (2020-04-17)

This issue is the rst ocial release.

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SUN2000-(2KTL-6KTL)-L1 User Manual Contents

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

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

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

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

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

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

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

1.6 Commissioning......................................................................................................................................................................... 6

1.7 Maintenance and Replacement..........................................................................................................................................6

2 Product Introduction...............................................................................................................7

2.1 Overview.................................................................................................................................................................................... 7

2.2 Component Description...................................................................................................................................................... 11

2.3 Label Description.................................................................................................................................................................. 12

2.4 Working Principles................................................................................................................................................................ 15

3 SUN2000 Storage...................................................................................................................17

4 System Installation............................................................................................................... 18

4.1 Checking Before the Installation..................................................................................................................................... 18

4.2 Preparing Tools and Instruments.................................................................................................................................... 19

4.3 Determining the Installation Position............................................................................................................................20

4.4 Moving a SUN2000.............................................................................................................................................................. 23

4.5 Installing a SUN2000........................................................................................................................................................... 24

4.5.1 Wall-Mounted Installation............................................................................................................................................. 25

4.5.2 Support-Mounted Installation.......................................................................................................................................27

5 Electrical Connection............................................................................................................30

5.1 Preparing Cables................................................................................................................................................................... 31

5.2 Connecting PE Cables.......................................................................................................................................................... 35

5.3 (Optional) Installing a Smart Dongle............................................................................................................................ 38

5.4 Installing a WLAN Antenna...............................................................................................................................................39

5.5 Connecting an AC Output Power Cable........................................................................................................................40

5.6 Connecting DC Input Power Cables................................................................................................................................44

5.7 (Optional) Connecting Battery Cables.......................................................................................................................... 48

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SUN2000-(2KTL-6KTL)-L1 User Manual Contents

5.8 (Optional) Connecting Signal Cables.............................................................................................................................50

6 System Commissioning........................................................................................................ 58

Verication Before Power-On........................................................................................................................................... 58

6.1

6.2 System Power-On................................................................................................................................................................. 59

7 Man-Machine Interaction....................................................................................................62

7.1 App Commissioning............................................................................................................................................................. 62

7.1.1 Downloading the FusionSolar App..............................................................................................................................62

7.1.2 (Optional) Registering an Installer Account............................................................................................................ 63

7.1.3 Creating a PV Plant and a User.................................................................................................................................... 64

7.1.4 (Optional) Setting the Physical Layout of the Smart PV Optimizers.............................................................. 64

7.2 Parameters Settings............................................................................................................................................................. 66

7.2.1 Energy Control.................................................................................................................................................................... 67

7.2.1.1 Grid-tied Point Control................................................................................................................................................. 67

7.2.1.2 Apparent Power Control on the Inverter Output Side...................................................................................... 71

7.2.1.3 Battery Control................................................................................................................................................................72

7.2.2 AFCI........................................................................................................................................................................................ 74

7.2.3 IPS Check (for Italy CEI0-21 Grid Code Only)......................................................................................................... 75

7.2.4 DRM (Australia AS4777).................................................................................................................................................77

8 System Maintenance............................................................................................................ 79

8.1 System Power-O.................................................................................................................................................................79

8.2 Routine Maintenance.......................................................................................................................................................... 80

8.3 Troubleshooting.....................................................................................................................................................................80

9 SUN2000 Disposal................................................................................................................. 93

9.1 Removing a SUN2000......................................................................................................................................................... 93

9.2 Packing a SUN2000..............................................................................................................................................................93

9.3 Disposing a SUN2000.......................................................................................................................................................... 93

10 Technical Parameters......................................................................................................... 94

10.1 SUN2000 Technical

10.2 Optimizer Technical Specications............................................................................................................................... 98

Specications................................................................................................................................ 94

A Grid Code.............................................................................................................................. 100

B Device Commissioning....................................................................................................... 104

C Resetting Password............................................................................................................ 107

D Rapid Shutdown................................................................................................................. 110

E Locating Insulation Resistance Faults............................................................................111

F Acronyms and Abbreviations............................................................................................114

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SUN2000-(2KTL-6KTL)-L1 User Manual 1 Safety Information

1 Safety Information

1.1 General Safety

Statement

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

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

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

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

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

● Operation beyond the conditions

● Installation or use in environments which are not international or national standards

● Unauthorized modications to the product or software code or removal of the product

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

● Equipment damage due to force majeure, such as earthquakes, re, and storms

● Damage caused during transportation by the customer

● Storage conditions that do not meet the requirements specied in this document

specied in this document

specied in relevant

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SUN2000-(2KTL-6KTL)-L1 User Manual 1 Safety Information

General Requirements

Do not work with power on during installation.

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

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

● In the case of a and turn on the re alarm bell or make an emergency call. Do not enter the building on re in any case.

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

● Tighten the screws to the specied torque using tools when installing the equipment.

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

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

● Do not open the host panel of the equipment.

● You shall not reverse engineer, decompile, disassemble, adapt, add code to the device software or alter the device software in any other way, research the internal implementation of the device, obtain the device software source code, infringe on Huawei's intellectual property, or disclose any device software performance test results.

re, immediately leave the building or the equipment area,

Personal Safety

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

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

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

1.2 Personnel Requirements

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

● Only

● Only qualied professionals are allowed to remove safety facilities and inspect

qualied professionals or trained personnel are allowed to install,

operate, and maintain the equipment.

the equipment.

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SUN2000-(2KTL-6KTL)-L1 User Manual 1 Safety Information

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

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

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

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

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

1.3 Electrical Safety

Grounding

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

● Do not damage the ground conductor.

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

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

General Requirements

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

● Ensure that all electrical connections comply with local electrical standards.

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

● Ensure that the cables you prepared meet local regulations.

● Use dedicated insulated tools when performing high-voltage operations.

rst

re may occur.

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SUN2000-(2KTL-6KTL)-L1 User Manual 1 Safety Information

AC and DC Power

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

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

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

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

re or personal injury.

Cabling

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

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

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

specications.

1.4 Installation Environment Requirements

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

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

● Do not expose the equipment to not perform any operation on the equipment in such environments.

ammable or explosive gas or smoke. Do

1.5 Mechanical Safety

Using Ladders

dierent types,

● Use wooden or berglass ladders when you need to perform live working at heights.

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

● Before using a ladder, check that it is intact and conrm its load bearing capacity. Do not overload it.

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

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SUN2000-(2KTL-6KTL)-L1 User Manual 1 Safety Information

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

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

– Keep your body steady.

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

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

of the ladder.

Drilling Holes

When drilling holes into a wall or

● Wear goggles and protective gloves when drilling holes.

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

Moving Heavy Objects

● Be cautious to avoid injury when moving heavy objects.

oor, observe the following safety precautions:

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

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SUN2000-(2KTL-6KTL)-L1 User Manual 1 Safety Information

1.6 Commissioning

When the equipment is powered on for the rst time, ensure that professional personnel set parameters correctly. Incorrect settings may result in inconsistency with local certication and aect the normal operation of the equipment.

1.7 Maintenance and Replacement

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

● Maintain the equipment with sucient knowledge of this document and using proper tools and testing equipment.

● Before maintaining the equipment, power it the delayed discharge label to ensure that the equipment is powered o.

● Turn o the AC and DC switches of the SUN2000 when maintaining the electric equipment or power distribution equipment connected the SUN2000.

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

● If the equipment is faulty, contact your dealer.

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

o and follow the instructions on

rectied. Failing to

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SUN2000-(2KTL-6KTL)-L1 User Manual 2 Product Introduction

2 Product Introduction

2.1 Overview

Function

Model

The SUN2000-(2KTL-6KTL)-L1 is a single-phase grid-tied string inverter that converts the DC power generated by PV strings into AC power and feeds the electricity into the power grid.

This document involves the following product models:

● SUN2000-2KTL-L1

● SUN2000-3KTL-L1

● SUN2000-3.68KTL-L1

● SUN2000-4KTL-L1

● SUN2000-4.6KTL-L1

● SUN2000-5KTL-L1

● SUN2000-6KTL-L1

Figure 2-1 Model

identier (using SUN2000-5KTL-L1 as an example)

Table 2-1 Identier description

No.

1 Product family

Meaning Value

SUN2000: grid-tied solar inverter

name

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SUN2000-(2KTL-6KTL)-L1 User Manual 2 Product Introduction

No. Meaning Value

2 Power level ● 2K: The power level is 2 kW.

● 3K: The power level is 3 kW.

● 3.68K: The power level is 3.68 kW.

● 4K: The power level is 4 kW.

● 4.6K: The power level is 4.6 kW.

● 5K: The power level is 5 kW.

● 6K: The power level is 6 kW.

3 Topology TL: transformerless

4 Design code L1: residential

Networking Application

The SUN2000 applies to residential rooftop grid-tied systems. The system consists of PV strings, grid-tied solar inverters, AC switches, and power distribution units (PDUs).

Figure 2-2 Single SUN2000 scenario (dashed boxes indicate optional

conguration)

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SUN2000-(2KTL-6KTL)-L1 User Manual 2 Product Introduction

Figure 2-3 SUN2000 cascading scenario (dashed boxes indicate optional

conguration)

● indicates the power ow direction, indicates the signal line, and indicates the wireless communication.

● In the SUN2000 cascading scenario, the master and slave solar inverters are both SUN2000-(2KTL-6KTL)-L1, and a maximum of three SUN2000s can be cascaded.

● In the SUN2000 cascading scenario, only one smart power sensor (G in the be connected to the master inverter.

● In the SUN2000 cascading scenario, the SUN2000s connected to the power grid must meet the local power grid requirements.

(A) PV string

(B) Smart PV optimizer (C) DC switch

gure) can

(D) SUN2000 (E) Backup (F) Residential PDU

(G) Smart Power Sensor (H) Important Load (I) Power grid

(J) Battery (K) Battery switch (L) Household load

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CA UTION

SUN2000-(2KTL-6KTL)-L1 User Manual 2 Product Introduction

(M) FusionSolar app (N) 4G Smart Dongle (O) WLAN-FE Smart

Dongle

(P) Router (Q) FusionSolar Smart

PV Management System

For detailed operations on devices in the network, see the following guides:

● SUN2000-450W-P Smart PV Optimizer Quick Guide

● LUNA2000-(5-30)-S0 User Manual

● Backup Box-(B0, B1) Quick Guide

The o-grid load output port of the Backup Box cannot be directly connected to the power grid. Otherwise, the Backup Box will be shut down due to overload.

Supported Power Grid Types

The SUN2000 supports the following power grid types: TN-S, TN-C, TN-C-S, and TT. In the TT power grid, the N-to-PE voltage must be less than 30 V.

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SUN2000-(2KTL-6KTL)-L1 User Manual 2 Product Introduction

Figure 2-4 Power grid types

2.2 Component Description

Appearance

Figure 2-5 Appearance

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SUN2000-(2KTL-6KTL)-L1 User Manual 2 Product Introduction

(1) LED indicators (2) Front panel

(3) Hanging kit (4) Mounting bracket

(5) Heat sink (6) Ventilation valve

(7) DC switch locking screw hole

(9) DC input terminals (PV1+/PV1–) (10) DC input terminals (PV2+/PV2–)

(11) Battery terminals (BAT+/BAT–) (12) Smart Dongle port (4G/FE)

(13) Antenna port (ANT) (14) Communications port (COM)

(15) AC output port (AC) (16) Ground point

● Note a: The DC switch locking screw is used to lock the DC switch to prevent accidental startup. It is delivered with the SUN2000.

● Note b: DC input terminals PV1 and PV2 are controlled by the DC switch.

2.3 Label Description

Enclosure Labels

Table 2-2 Enclosure label description

(8) DC switchb (DC SWITCH)

Icon

Name Meaning

Burn warning Do not touch a

running SUN2000 because the enclosure is hot when the SUN2000 is running.

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SUN2000-(2KTL-6KTL)-L1 User Manual 2 Product Introduction

Icon Name Meaning

Delayed discharge ● High voltage exists

after the SUN2000 is powered on. Only qualied and trained electrical technicians are allowed to perform operations on the SUN2000.

● Residual voltage exists after the SUN2000 is powered

o. It takes 5 minutes for the SUN2000 to discharge to the safe voltage.

Refer to documentation

Reminds operators to refer to the documents delivered the SUN2000.

Grounding Indicates the position

for connecting the protective earthing (PE) cable.

Operation warning Do not remove the

connector or antenna when the SUN2000 is running.

Grounding warning Ground the SUN2000

before powering it on.

Serial number (SN) Indicates the SUN2000

SN.

Media access control (MAC) address

Indicates the MAC address.

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SUN2000-(2KTL-6KTL)-L1 User Manual 2 Product Introduction

Icon Name Meaning

Nameplate

QR code for logging in to the SUN2000 WLAN

Scan the QR code to connect to the Huawei SUN2000 WLAN (Android) or obtain the WLAN login password (iOS).

The labels are for reference only.

Figure 2-6 Nameplate (using SUN2000-5KTL-L1 as an example)

(1) Trademark and model (2) Key technical specications

(3) Compliance symbols (4) Company name and country of

origin

The nameplate gure is for reference only.

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SUN2000-(2KTL-6KTL)-L1 User Manual 2 Product Introduction

2.4 Working Principles

Schematic Diagram

The SUN2000 receives inputs from up to two PV strings. Then the inputs are grouped into two MPPT routes inside the SUN2000 to track the maximum power point of the PV strings. The DC power is then converted into single-phase AC power through an inverter circuit. Surge protection is supported on both the DC and AC sides.

The SUN2000 uses a reserved battery port for energy storage expansion. Battery performs charging and discharging operations according to the battery working mode.

Figure 2-7 Schematic diagram

Working Mode

Figure 2-8 Working modes

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SUN2000-(2KTL-6KTL)-L1 User Manual 2 Product Introduction

Table 2-3 Working mode description

Working mode

Standby mode

Operating mode

Description

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

● The SUN2000 continuously detects its operation status. Once the operating conditions are met, the SUN2000 enters Operating mode.

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

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 power.

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

● If the SUN2000 detects that the output power of PV strings does not meet the requirements for grid-tied power generation, it enters Standby mode.

Shutdown mode

● In Standby or Operating mode, if the SUN2000 detects a shutdown command or a fault, it enters Shutdown mode.

● In Shutdown mode, if the SUN2000 detects that the fault is rectied or the startup command is executed, the SUN2000 enters Standby mode.

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SUN2000-(2KTL-6KTL)-L1 User Manual 3 SUN2000 Storage

3 SUN2000 Storage

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

● Do not unpack the SUN2000.

● Keep the storage temperature at –40°C to +70°C and the humidity at 5%– 95% RH.

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

● A maximum of eight SUN2000s can be stacked. To avoid personal injury or device damage, stack SUN2000s with caution to prevent them from falling over.

● During the storage period, check the SUN2000 periodically. (It is recommended that the check is performed every three months.) Replace the packing materials that are damaged by insects or rodents in a timely manner.

● If the SUN2000 has been stored for more than two years, it must be checked and tested by professionals before being put into use.

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SUN2000-(2KTL-6KTL)-L1 User Manual 4 System Installation

4 System Installation

4.1 Checking Before the Installation

Checking Outer Packing

Before unpacking the SUN2000, check the outer packing for damage, such as holes and cracks, and check the SUN2000 model. If any damage is found or the SUN2000 model is not what you requested, do not unpack the package and contact your dealer as soon as possible.

You are advised to remove the packing materials within 24 hours before installing the SUN2000.

Checking Deliverables

After unpacking the SUN2000, check that the deliverables are intact and complete. If any item is missing or damaged, contact your dealer.

For details about the number of accessories delivered with the SUN2000, see the

List

in the packing case.

Packing

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SUN2000-(2KTL-6KTL)-L1 User Manual 4 System Installation

4.2 Preparing Tools and Instruments

Type Tools and Instruments

Installation

Hammer drill (with a drill bit of 8 mm)

Diagonal pliers Wire strippers Torque screwdriver

Rubber mallet Utility knife Cable cutter

Torque socket wrench Torque wrench

Crimping tool (model: PVCZM-22100/19100)

Cable tie Vacuum cleaner Multimeter (DC

Cord end terminal crimper

Disassembly and Assembly Tool (model: PV-MS-HZ open-end wrench)

voltage measurement range ≥ 600 V DC)

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SUN2000-(2KTL-6KTL)-L1 User Manual 4 System Installation

Type Tools and Instruments

Marker Steel measuring tape Level

Hydraulic pliers Heat-shrink tubing Heat gun

Personal protective equipment (PPE)

Safety gloves Safety goggles Dust mask

- -

Safety boots

4.3 Determining the Installation Position

Basic Requirements

● The SUN2000 is protected to IP65 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 enclosure and heat sink, because these parts are extremely hot during operation.

● Do not install the SUN2000 near ammable or explosive materials.

● Do not install the SUN2000 at a place within children's reach.

● The SUN2000 will be corroded in salt areas, and the salt corrosion may cause re. Do not install the SUN2000 outdoors in salt areas. A salt area refers to the region within 500 meters from the coast or prone to sea breeze. The regions prone to sea breeze vary with weather conditions (such as typhoons and monsoons) or terrains (such as dams and hills).

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SUN2000-(2KTL-6KTL)-L1 User Manual 4 System Installation

Installation Environment Requirements

● The SUN2000 must be installed in a well-ventilated environment to ensure good heat dissipation.

● When the SUN2000 is installed under direct sunlight, the power may be derated due to the temperature rise.

● You are advised to install the SUN2000 in a sheltered place or install an awning over it.

Mounting Structure Requirements

● The mounting structure where the SUN2000 is installed must be

● Do not install the SUN2000 on ammable building materials.

● Ensure that the installation surface is solid enough to bear the weight of the SUN2000.

● In residential areas, do not install the SUN2000 on plaster board walls or walls made of similar materials with a weak sound insulation performance because the noise generated by the SUN2000 may interfere with residents.

re resistant.

Installation Angle Requirements

The SUN2000 can be wall-mounted or pole-mounted. The installation angle requirements are as follows:

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

● Do not install the SUN2000 at forward tilted, excessive back tilted, side tilted, horizontal, or upside down positions.

Figure 4-1 Installation angle

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SUN2000-(2KTL-6KTL)-L1 User Manual 4 System Installation

Installation Space Requirements

● Reserve enough clearance around the SUN2000 to ensure sucient space for installation and heat dissipation.

Figure 4-2 Installation space

● When installing multiple SUN2000s, install them in horizontal mode if sucient space is available and install them in triangle mode if no sucient space is available. Stacked installation is not recommended.

Figure 4-3 Horizontal installation mode (recommended)

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Figure 4-4 Triangle installation mode (recommended)

Figure 4-5 Stacked installation mode (not recommended)

The installation gures are for reference only and are irrelevant to the SUN2000 cascading scenario.

4.4 Moving a SUN2000

Procedure

Step 1 Hold the handles on both sides of the SUN2000, lift the SUN2000 from the

packing case, and transport it to the installation position.

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● Move the SUN2000 with care to prevent device damage and personal injury.

● Do not use the wiring terminals and ports at the bottom to support any weight

of the SUN2000.

● When you need to temporally place the SUN2000 on the ground, use foam,

paper, or other protection material to prevent damage to its enclosure.

Figure 4-6 Moving a SUN2000

----End

4.5 Installing a SUN2000

Installation Precautions

Figure 4-7 shows the dimensions of mounting holes for the SUN2000.

Figure 4-7 Mounting bracket dimensions

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4.5.1 Wall-Mounted Installation

Procedure

Step 1 Determine the positions for drilling holes using the marking-o template. Level

the positions of mounting holes using a level, and mark the positions with a marker.

Step 2 Secure the mounting bracket.

When drilling holes, avoid the water pipes and power cables buried in the wall.

● M6x60 expansion bolts are delivered with the SUN2000. If the length and amount of the bolts do not meet installation requirements, prepare M6 stainless steel expansion bolts by yourself.

● The expansion bolts delivered with the inverter are used for solid concrete walls. For other types of walls, prepare bolts by yourself and ensure that the wall meets the load bearing requirements of the inverter.

Figure 4-8 Expansion bolt composition

(1) Bolt

(2) Nut (3) Spring washer

(4) Flat washer (5) Expansion sleeve

● To prevent dust inhalation or contact with eyes, wear safety goggles and an dust mask when drilling holes.

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

● Level the head of the expansion sleeve with the concrete wall after removing the nut, spring washer, and

at washer. Otherwise, the mounting bracket will

not be securely installed on the wall.

● Loosen the nut, spring washer, and

at washer of the expansion bolt at the

bottom.

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Figure 4-9 Installing expansion bolts

Step 3 (Optional) Install the locking screw for the DC switch.

Figure 4-10 Installing a locking screw for the DC switch

Step 4 Install the SUN2000 on the mounting bracket.

Step 5 Tighten the nuts.

Figure 4-11 Tightening nuts

Step 6 (Optional) Install an anti-theft lock.

● Prepare an anti-theft lock suitable for the lock hole diameter (Ф10 mm).

● An outdoor waterproof lock is recommended.

● Keep the key to the anti-theft lock.

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Figure 4-12 Installing an anti-theft lock

----End

4.5.2 Support-Mounted Installation

Procedure

Step 1 Determine the positions for drilling holes using the

marking-o template, and

then mark the positions with a marker.

Figure 4-13 Determining hole positions

Step 2 Drill holes using a hammer drill.

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

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Figure 4-14 Drilling holes

Step 3 Secure the mounting bracket.

Figure 4-15 Secure the mounting bracket

Prepare bolt assemblies based on the hole diameter of the mounting bracket.

Step 4 (Optional) Install the locking screw for the DC switch.

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Figure 4-16 Installing a locking screw for the DC switch

Step 5 Install the SUN2000 on the mounting bracket.

Step 6 Tighten the bolt assemblies.

Figure 4-17 Tightening bolt assemblies

Step 7 (Optional) Install an anti-theft lock.

● Prepare an anti-theft lock suitable for the lock hole diameter (Ф10 mm).

● An outdoor waterproof lock is recommended.

● Keep the key to the anti-theft lock.

Figure 4-18 Installing an anti-theft lock

----End

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5 Electrical Connection

Precautions

Before connecting cables, ensure that the DC switch on the SUN2000 and all the switches connecting to the SUN2000 are set to OFF position. Otherwise, the high voltage of the SUN2000 may result in electric shocks.

● The device damage caused by incorrect cable connections is not covered under any warranty.

● Only certied electricians are allowed to connect cables.

● Operation personnel must wear proper PPE when connecting cables.

The cable colors shown in the electrical connection diagrams provided in this chapter are for reference only. Select cables in accordance with local cable specications (green-andyellow cables are only used for PE).

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5.1 Preparing Cables

Figure 5-1 SUN2000 cable connections (dashed boxes indicate optional

conguration)

Table 5-1 Component description

No.

A PV string ● A PV string is

B Smart PV optimizer The SUN2000-450W-P

C DC switch Recommended: a DC

Component Description Source

composed of the PV modules connected in series and works with an optimizer.

● The SUN2000 supports the input from two PV strings.

smart PV optimizer is supported.

circuit breaker with a rated voltage greater than or equal to 600 V DC and a rated current of 20 A

Prepared by the customer

Purchased from Huawei

Prepared by the customer

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No. Component Description Source

D Battery The SUN2000 can

connect to LUNA2000 batteries.

The SUN2000 can connect to LG-RESU batteries (LG RESU7H and RESU10H).

E Battery switch Recommended: a DC

circuit breaker with a rated voltage greater than or equal to 600 V DC and a rated current of 20 A

Smart Dongle

Supported models:

● WLAN-FE Smart Dongle: SDongleA-05

● 4G Smart Dongle: SDongleA-03

Smart Power Sensor

The SUN2000 can connect to the DDSU666H and DTSU666-H smart power sensors.

Purchased from Huawei

Prepared by the customer

Purchased from Huawei

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No. Component Description Source

The following third-party meters are also supported: GAVAZZIEM340-DIN AV2 3 X S1 X08, GAVAZZI-EM111DIN AV8 1 X S1 X08, GAVAZZI-EM112-DIN AV0 1 X S1 X08, CCSWNC-3Y-400-MB, and CCS-WNC-3D-240-MB.

● Third-party meters support only LG batteries. The LUNA2000 batteries are not supported.

● The GAVAZZI threephase meter has dierent power sampling methods. As a result, the power is incorrectly displayed on the NMS.

● The LUNA2000 batteries can be used only with DDSU666-H and DTSU666-H meters.

Prepared by the customer

H SUN2000 Select a proper model as

required.

I AC switch Recommended: a single-

phase AC circuit breaker with a rated voltage greater than or equal to 250 V AC and a rated current of:

● 16 A (SUN2000-2KTLL1)

● 25 A (SUN2000-3KTLL1 and SUN2000-3.68KTL-L1)

● 32 A (SUN2000-4KTLL1, SUN2000-4.6KTLL1, SUN2000-5KTL-L1, and SUN2000-6KTLL1)

Purchased from Huawei

Prepared by the customer

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No. Component Description Source

● Note a: For details about how to use the 4G Smart Dongle SDongleA-03, see the

SDongleA-03 Quick Guide (4G)

FE Smart Dongle SDongleA-05, see the

FE)

. You can obtain these documents at https://support.huawei.com/

. For details about how to use the WLAN-

SDongleA-05 Quick Guide (WLAN-

enterprise by searching for models.

● Note b: The Spanish version can use only the DDSU666-H smart power sensor provided by Huawei.

Table 5-2 Cable description

No. Cable Type Recommended

Specications

1 DC input

power cable

Common outdoor PV cable in the industry

● Conductor crosssectional area: 4–6

● Cable outer diameter: 5.5–9 mm

2 (Optional)

Battery cable

Common outdoor PV cable in the industry

● Conductor crosssectional area: 4–6

● Cable outer diameter: 5.5–9 mm

3 (Optional)

Signal cable

Outdoor shielded twisted pair cable

● Conductor crosssectional area:

– Combined

crimping of cables on the port: 0.20–0.35

– Crimping the

cables on the port without combining them: 0.20–1

● Cable outer diameter:

– 4-hole rubber

plug: 4–8 mm

– 2-hole rubber

plug: 8–11 mm

Source

Prepared by the customer

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No. Cable Type Recommended

Source

Specications

4 AC output

power

cable

● Not using the PE equipotential point at the AC output port: two-core (L and N) outdoor copper cable

● Conductor crosssectional area: 4–6

● Cable outer diameter: 10–21 mm

Prepared by the customer

● Using the PE equipotential point at the AC output port: three-core (L, N, and PE) outdoor copper cable

5 PE cable Single-core outdoor

copper cable and M6 OT terminal

4–10 mm

Prepared by the customer

Note a: The minimum cross-sectional area of the cable should be selected based on the rated value of the AC fuse.

● The minimum cable diameter must comply with local cable standards.

● The factors that aect cable selection include the rated current, cable type, routing mode, ambient temperature, and maximum expected line loss.

5.2 Connecting PE Cables

Precautions

● Ensure that the PE cable is securely connected. Otherwise, electric shocks may occur.

● Do not connect the neutral wire to the enclosure as a PE cable. Otherwise, electric shocks may occur.

● The PE point at the AC output port is used only as a PE equipotential point, and cannot substitute for the PE point on the enclosure.

● It is recommended that silica gel or paint be used around the ground terminal after the PE cable is connected.

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Additional Information

The SUN2000 provides the grounding detection function. This function is used to check whether the SUN2000 is properly grounded before the SUN2000 starts, or check whether the ground cable is disconnected when the SUN2000 is running. This function is only available under limited conditions. To ensure the safe operation of the SUN2000, properly ground the SUN2000 according to the connection requirements of the ground cable. For some power grid types, if the output side of the SUN2000 is connected to an isolation transformer, ensure that the SUN2000 is properly grounded and set Grounding inspection to Disable to enable the SUN2000 to run properly. If you are not sure whether the SUN2000 is connected to such a type of power grid, contact your dealer or Huawei technical support for

● According to IEC 62109, to ensure the safe operation of the SUN2000 in the case of ground cable damage or disconnection, properly connect the ground cable of the SUN2000 and ensure that it meets at least one of the following requirements before the grounding detection function becomes invalid:

– If the PE terminal is not connected to the AC connector, use a single-core

– Use cables with the same diameter as the AC output power cable and

● In some countries and regions, the SUN2000 must have additional ground cables. Use cables with the same diameter as the AC output power cable and ground the PE terminal on the AC connector and the ground screws on the chassis.

conrmation.

outdoor copper cable with a conductor cross-sectional area of at least 10 mm2 as the PE cable on the chassis.

ground the PE terminal on the AC connector and the ground screws on the chassis.

Procedure

Step 1 Crimp 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 insulation tape. The

heat shrink tubing is used as an example.

● When using a heat gun, protect the equipment from being scorched.

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Figure 5-2 Crimping an OT terminal

(A) Core wire (B) Insulation layer (C) Heat shrink tubing

(D) Hydraulic pliers (E) Heat gun

Step 2 Connect the PE cable.

● Ensure that the PE cable is connected securely.

● You are advised to use the right ground point and reserve the other ground

point for future use.

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Figure 5-3 Connecting a PE cable

----End

5.3 (Optional) Installing a Smart Dongle

Procedure

● You are advised to install the Smart Dongle before installing the WLAN antenna.

● If you prepared a Smart Dongle without a SIM card, you need to prepare a standard SIM card (size: 25 mm x 15 mm) with the capacity greater than or equal to 64 KB.

● When installing the SIM card, determine its installation direction based on the silk screen and arrow on the card slot.

● Press the SIM card in place to lock it, indicating that the SIM card is correctly installed.

● When removing the SIM card, push it inwards to eject it.

● When reinstalling the cover of the Smart Dongle, ensure that the buckles spring back in place with a click sound.

● 4G Smart Dongle (4G Communication)

Figure 5-4 Installing a 4G Smart Dongle

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● WLAN-FE Smart Dongle (FE Communication)

You are advised to use a CAT 5E outdoor shielded network cable (outer diameter < 9 mm; internal resistance ≤ 1.5 ohms/10 m) and shielded RJ45 connectors.

Figure 5-5 Installing a WLAN-FE Smart Dongle (FE communication)

There are two types of Smart Dongle:

● For details about how to use the WLAN-FE Smart Dongle SDongleA-05, see the

SDongleA-05 Quick Guide (WLAN-FE)

the document.

● For details about how to use the 4G Smart Dongle SDongleA-03, see the

SDongleA-03 Quick Guide (4G)

document.

The quick guide is delivered with the Smart Dongle.

5.4 Installing a WLAN Antenna

. You can also scan the QR code to obtain

. You can also scan the QR code to obtain the

Procedure

Step 1 Remove the watertight cap from the ANT port.

Step 2 Install the washer to the ANT port on the chassis.

Step 3 Install the WLAN antenna.

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Ensure that the WLAN antenna is installed securely.

Figure 5-6 Installing a WLAN antenna

----End

5.5 Connecting an AC Output Power Cable

Precautions

An AC switch must be installed on the AC side of the SUN2000 to ensure that the SUN2000 can be safely disconnected from the power grid.

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

The SUN2000 is integrated with a comprehensive residual current monitoring unit. Once detecting that the residual current exceeds the threshold, the SUN2000 immediately disconnects itself from the power grid.

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● If the external AC switch can perform earth leakage protection, the rated leakage action current should be greater than or equal to 100 mA.

● If multiple SUN2000s connect to the general residual current device (RCD) through their respective external AC switches, the rated leakage action current of the general RCD should be greater than or equal to the number of SUN2000s multiplied by 100 mA.

● A knife switch cannot be used as an AC switch.

Procedure

Step 1 Connect the AC output power cable to the AC connector.

● The PE point at the AC output port is used only as a PE equipotential point, and cannot substitute for the PE point on the enclosure.

● Keep the AC output power cable and the PE cable close to each other.

● Keep the AC output power cable and the DC input power cable close to each other.

● Ensure that the cable jacket is inside the connector.

● Ensure that the exposed core is totally inserted into the cable hole.

● Ensure that AC output cable is secured. Failing to do so may cause SUN2000 malfunction or damage to its AC connector.

● Ensure that the cable is not twisted.

Figure 5-7 Assembling an AC connector (three-core wire)

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Figure 5-8 Assembling an AC connector (two-core wire)

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

● For the core installation method and the length for cable stripping, see the instructions on the side of the plug insert.

Figure 5-9 Length for cable stripping

Step 2 Connect the AC connector to the AC output port.

Ensure that the AC connector is connected securely.

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Figure 5-10 Securing an AC connector

Step 3 Check the route of the AC output power cable.

Figure 5-11 Cabling requirements

----End

Follow-up Procedure

Before removing the AC connector, ensure that the DC switch at the bottom of the SUN2000 and all the switches connected to the SUN2000 are OFF.

To remove the AC connector from the SUN2000, perform the operations in reverse order.

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Figure 5-12 Removing a plug insert

5.6 Connecting DC Input Power Cables

Precautions

● Before connecting the DC input power cables, ensure that the DC voltage is within the safe range (lower than 60 V DC) and that the DC switch on the SUN2000 is OFF. Failing to do so may result in electric shocks.

● When the SUN2000 is running, it is not allowed to work on the DC input power cables, such as connecting or disconnecting a PV string or a PV module in a PV string. Failing to do so may cause electric shocks.

● If no PV string connects to a DC input terminal of the SUN2000, do not remove the watertight cap from the DC input terminals. Otherwise, the IP rating of the SUN2000 will be

Ensure that the following conditions are met. Otherwise, the SUN2000 may be damaged, or even a

● The DC input voltage of the SUN2000 shall not exceed maximum input voltage under any circumstance.

● The polarities of electric connections are correct on the DC input side. The positive and negative terminals of a PV string connect to corresponding positive and negative DC input terminals of the SUN2000.

● If the DC input power cables are reversely connected, do not operate the DC switch as well as positive and negative connectors immediately. Wait until the night when solar irradiance declines and the PV string current drops to below

0.5 A. Then set the DC switch to the OFF position, remove the positive and negative connectors, and correct the polarities of the DC input power cables.

aected.

re could happen.

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● Since the output of the PV string connected to the SUN2000 cannot be grounded, ensure that the PV module output is well insulated to ground.

● During the installation of PV strings and the SUN2000, the positive or negative terminals of PV strings may be short-circuited to ground if the power cable is not properly installed or routed. In this case, an AC or DC short circuit may occur and damage the SUN2000. The caused device damage is not covered under any warranty or service agreement.

Figure 5-13 DC input terminals

Procedure

Step 1 Assemble a DC connector.

(1) Terminals of DC input 1 (2) Terminals of DC input 2

Use the Staubli MC4 positive and negative metal terminals and DC connectors delivered with the SUN2000. Using incompatible positive and negative metal terminals and DC connectors may result in serious consequences. The caused device damage is not covered under any warranty or service agreement.

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● Keep the DC input PV+ cable and PV– cable close to each other.

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

● Before assembling DC connectors, label the cable polarities correctly to ensure correct cable connections.

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

● Insert the crimped metal terminals 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.

Figure 5-14 Assembling a DC connector

● If the PV string is not congured with an optimizer, use a multimeter to measure the voltage at the DC position. The multimeter must have a DC voltage range of at least 600 V. If the voltage is a negative value, the DC input polarity is incorrect and needs correction. If the voltage is greater than 600 V, too many PV modules are congured to the same string. Remove some PV modules.

● If the PV string is congured with an optimizer, check the cable polarity by referring to the Smart PV optimizer quick guide.

Before performing Step 2, ensure that the DC switch is set to OFF.

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Step 2 Insert the positive and negative connectors into corresponding DC input terminals

on the SUN2000.

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

Figure 5-15 Connecting DC input power cables

If the DC input power cable is reversely connected and the DC switch is set to ON, do not immediately turn o the DC switch or reconnect the positive and negative connectors. Otherwise, the device may be damaged. The caused device damage is not covered under any warranty or service agreement. Wait until the night when solar irradiance declines and the PV string current drops to below 0.5 A. Then set the DC switch to the OFF position, remove the positive and negative connectors, and correct the polarities of the DC input power cables.

----End

Follow-up Procedure

Before removing the positive and negative connectors, ensure that the DC switch is OFF.

To remove the positive and negative connectors from the SUN2000, insert a disassembly tool into the notch and press the tool with an appropriate force.

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Figure 5-16 Removing a DC connector

5.7 (Optional) Connecting Battery Cables

Prerequisites

● Battery short circuits may cause personal injury. The high transient current generated by a short circuit may release a surge of power and cause re.

● Do not connect or disconnect the battery cable when the SUN2000 is running. Failing to do so may cause electric shocks.

● Before connecting the battery cables, ensure that the DC switch on the SUN2000 and all the switches connecting to the SUN2000 are OFF, and the SUN2000 has no residual electricity. Otherwise, the high voltage of the SUN2000 and battery may result in electric shocks.

● If no battery connects to the SUN2000, do not remove the watertight cap from the battery terminal. Otherwise, the IP rating of the SUN2000 will be If a battery connects to the SUN2000, set aside the watertight cap. Reinstall the watertight cap immediately after removing the connector. The high voltage of the battery terminal may result in electric shocks.

aected.

A battery switch can be congured between the SUN2000 and the battery to ensure that the SUN2000 can be safely disconnected from the battery.

Do not connect loads between the SUN2000 and the battery.

The battery cables should be connected correctly. That is, the positive and negative terminals of the battery connect to the positive and negative battery terminals on the SUN2000 respectively. Otherwise, the SUN2000 may be damaged, or even a

re could happen.

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● During the installation of the SUN2000 and battery, the positive or negative terminal of the battery will be short-circuited to ground if power cables are not installed or routed as required. In this case, an AC or DC short circuit may occur and damage the SUN2000. The caused device damage is not covered under any warranty or service agreement.

● The cabling distance between the battery and the SUN2000 should be less than or equal to 10 meters, and within 5 meters is recommended.

Procedure

Step 1 Assemble the positive and negative connectors by referring to 5.6 Connecting DC

Input Power Cables.

● The battery voltage will result in serious injury. Use dedicated insulation tools to connect cables.

● Ensure that cables are correctly connected between the battery terminal and the battery switch, and between the battery switch and the SUN2000 battery terminal.

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

Step 2 Insert the positive and negative connectors into corresponding battery terminals

on the SUN2000.

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

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Figure 5-17 Connecting battery cables

----End

5.8 (Optional) Connecting Signal Cables

Context

When laying out signal cables, separate them from power cables and keep them away from strong interference sources to prevent communication interruption.

Figure 5-18 Signal cable ports

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Table 5-3 COM port denition

No. Label Denition Single SUN2000

Scenario

1 485B1 RS485B, RS485

- Used for connecting to

dierential

signal–

2 485A1 RS485A, RS485

dierential

signal+

3 485B2 RS485B, RS485

dierential

signal–

Used for connecting to the RS485 signal ports of the battery and smart power

4 485A2 RS485A, RS485

dierential

signal+

sensor. When both battery and power meter are congured, they need be crimped to the 485B2 and 485A2 ports.

5 GND GND of the

enable

Used for connecting to GND of the enable

signal/12V/DI1/DI2. signal/12V/DI1/ DI2

SUN2000 Cascading Scenario

the solar inverters.

Used for connecting to the RS485 signal ports of the battery and smart power sensor. When both battery and smart power sensor are

congured,

they need be crimped to the 485B2 and 485A2 ports.

6 EN+ Enable signal

+/12V+

7 DI1 Digital input

signal 1+

Used for connecting to the enable signal of

the battery and the 12V positive signal.

Used for connecting to the DI1 positive

signal. It can be used for connecting to the

DRM0 scheduling signal or reserved for the

rapid shutdown signal.

8 DI2 Digital input

signal 2+

Used for connecting to the DI2 positive

signal. It can be reserved for the feedback

signal of the Backup device.

For details about how to connect signal cables, see the SUN2000L-(2KTL-5KTL) and

SUN2000-(2KTL-6KTL)-L1 Battery and Smart Power Sensor Quick Guide. You can also

scan the QR code to obtain the document.

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Communication Networking Mode

The smart power sensor and Smart Dongle must be connected to the same SUN2000.

● Single SUN2000 scenarios

Figure 5-19 Single SUN2000

Figure 5-20 Connecting cables to the smart power sensor (single SUN2000)

● SUN2000 cascading scenarios

– In-phase grid connection

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Figure 5-21 In-phase grid connection

Figure 5-22 Connecting cables to the smart power sensor (in-phase grid

connection)

– Balanced three-phase grid connection

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Figure 5-23 Balanced three-phase grid connection

Figure 5-24 Connecting cables to the smart power sensor (balanced

three-phase grid connection)

● In cascading scenarios, the inverters are required to connect to the management system through a Smart Dongle.

● In the preceding networking, the SUN2000s are cascaded and support the grid-tied point control function to achieve zero export.

● If the SUN2000s requires the grid-tied point control function, they need to be connected to a smart power sensor.

● In the scenario of balanced three-phase grid connection, if the SUN2000s requires the grid-tied point control function, they need to be connected to a three-phase smart power sensor to control the total three-phase power.

● Only one LG battery is supported, and the LG battery must be connected to the inverter equipped with the Smart Dongle.

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Procedure

Step 1 Connect signal cables to corresponding signal connectors.

● Ensure that the protection layer of the cable is in the connector. The surplus core should be cut

● Ensure that the exposed core is totally inserted into the cable hole.

● Ensure that the signal cables are connected securely.

● Ensure that the cables are not twisted.

● If multiple signal cables need to be connected to a single connector, ensure that the outer diameters of the signal cables are the same.

Figure 5-25 Crimping two signal cables

o from the protection layer.

Figure 5-26 Crimping three signal cables

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Figure 5-27 Assembling a signal connector (single SUN2000)

Figure 5-28 Assembling a signal connector (SUN2000 cascading)

Step 2 Connect the signal connector to the corresponding port.

Ensure that the signal connector is connected securely.

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Figure 5-29 Securing a signal connector

----End

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SUN2000-(2KTL-6KTL)-L1 User Manual 6 System Commissioning

6 System Commissioning

6.1 Verication Before Power-On

Table 6-1 Check items and acceptance criteria

No. Check Item Acceptance Criteria

1 SUN2000 The SUN2000 is installed correctly and

securely.

2 WLAN antenna The WLAN antenna is installed

correctly and securely.

3 Cables routing Cables are routed properly as required

by the customer.

4 Cable tie Cable ties are evenly distributed and no

burr exists.

5 Grounding The PE cable is connected correctly,

securely, and reliably.

6 Switch The DC switch and all the switches

connecting to the SUN2000 are OFF.

7 Cable connection The AC output power cable, DC input

power cable, battery cable, and signal cable are connected correctly, securely, and reliably.

8 Unused terminal and port Unused terminals and ports are locked

by watertight caps.

9 Installation environment The installation space is proper, and

the installation environment is clean and tidy.

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6.2 System Power-On

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 allowed range.

● If the DC power supply is connected but the AC power supply is disconnected, the SUN2000 will report a Grid Loss alarm. The SUN2000 can start properly only after the power grid recovers.

● If the AC power supply is connected but the battery is not connected, the SUN2000 reports a Battery Abnormal alarm.

● If the SUN2000 is connected to LG batteries, turn on the DC switch within 1 minute after the AC switch is turned on. Otherwise, the SUN2000, connected to the power grid, will shut down and start again.

Procedure

Step 1 If the battery port of the SUN2000 is connected to a battery, turn on the auxiliary

Step 2 Turn on the AC switch between the SUN2000 and the power grid.

Step 3 (Optional) Remove the locking screw from the DC switch.

Step 4 Turn on the DC switch between the PV string and the SUN2000 if there is any.

Step 5 Turn on the DC switch at the bottom of the SUN2000.

Step 6 Observe the LEDs to check the SUN2000 operating status.

power switch of the battery and then the battery switch.

Figure 6-1 Removing the locking screw from a DC switch

Table 6-2 LED indicators 1

7 Man-Machine Interaction

7.1 App Commissioning

7.1.1 Downloading the FusionSolar App

● Method 1: Access https://solar.huawei.com using the mobile phone browser

and download the latest installation package.

Figure 7-1 Download Mode

● Method 2: Search for FusionSolar on Huawei AppGallery and download the

latest installation package.

● Method 3: Scan the following QR code and download the latest installation

package.

Figure 7-2 QR code

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7.1.2 (Optional) Registering an Installer Account

● If you have an installer account, skip this step.

● You can register an account only using a mobile phone only in China.

● The mobile number or email address used for registration is the user name for logging in to the FusionSolar app.

Create the

rst installer account and create a domain named after the company

name.

Figure 7-3 Creating the rst installer account

To create multiple installer accounts for a company, log in to the FusionSolar app and tap Add User to create an installer account.

Figure 7-4 Creating multiple installer accounts for the same company

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7.1.3 Creating a PV Plant and a User

Figure 7-5 Creating a PV plant and a user

● In the quick settings, the grid code is set to N/A by default (automatic startup is not supported). Set the grid code based on the area where the PV plant is located.

● For details about how to use the site deployment wizard, see

Guide

. You can scan the QR code to download the quick guide.

FusionSolar App Quick

7.1.4 (Optional) Setting the Physical Layout of the Smart PV Optimizers

● If smart PV optimizers are congured for PV strings, ensure that the smart PV optimizers have been successfully connected to the SUN2000 before performing the operations in this section.

● Check that the SN labels of smart PV optimizers are correctly attached to the physical layout template.

● Take and save a photo of the physical layout template. Keep your phone parallel to the template and take a photo in landscape mode. Ensure that the four positioning points in the corners are in the frame. Ensure that each QR code is attached within the frame.

● For details about the physical layout of smart PV optimizers, see

Quick Guide

. You can scan the QR code to download the quick guide.

FusionSolar App

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SUN2000-(2KTL-6KTL)-L1 User Manual 7 Man-Machine Interaction

Scenario 1: Setting on the FusionSolar Server Side (Solar Inverter Connected to the Management System)

Step 1 Log in to the FusionSolar app and tap the plant name on the Home screen to

access the plant screen. Select Layout, tap , and upload the physical layout template photo as prompted.

Figure 7-6 Uploading the physical layout template photo (App)

You can also upload the physical layout template photo on the WebUI as follows: Log in to https://intl.fusionsolar.huawei.com to access the WebUI of the FusionSolar Smart PV Management System. On the Home page, click the plant name to go to the plant page. Choose Layout, click Click to Upload, and upload the physical layout template photo.

Figure 7-7 Uploading the physical layout template photo (WebUI)

Step 2 Log in to https://intl.fusionsolar.huawei.com to access the WebUI of the

FusionSolar Smart PV Management System. On the Home page, click the plant name to go to the plant page. Select Layout. Choose Generate layout, and create a physical layout as prompted. You can also manually create a physical location layout.

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Figure 7-8 Physical layout design of PV modules

----End

Scenario 2: Setting on the Solar Inverter Side (Solar Inverter Not Connected to the Management System)

Step 1 Access the Device Commissioning screen on the FusionSolar app to set the

physical layout of Smart PV Optimizers.

1. Log in to the FusionSolar app. On the Device Commissioning screen, choose Maintenance > Optimizer layout. The Optimizer layout screen is displayed.

2. Tap the blank area. The Identify image and Add PV modules buttons are displayed. You can use either of the following methods to perform operations as prompted:

– Method 1: Tap Identify image and upload the physical layout template

photo to complete the optimizer layout. (The optimizers that fail to be identied need to be manually bound.)

– Method 2: Tap Add PV modules to manually add PV modules and bind

the optimizers to the PV modules.

Figure 7-9 Physical layout design of PV modules

----End

7.2 Parameters Settings

Go to the Device Commissioning screen and set SUN2000 parameters. For details about entering the Device Commissioning screen, see B Device Commissioning.

To set more parameters, tap Settings. For details about the parameters, see the

FusionSolar APP and SUN2000 App User Manual

to obtain the document.

. You can also scan the QR code

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7.2.1 Energy Control

7.2.1.1 Grid-tied Point Control

Function

Limits or reduces the output power of the PV power system to ensure that the output power is within the power deviation limit.

Procedure

Step 1 On the home screen, choose Power adjustment > Grid-tied point control.

Figure 7-10 Grid-tied point control

Table 7-1 Grid-tied point control

Parameter Name

Active power

Unlimited - If this parameter is set to Unlimited,

Description

the output power of the SUN2000 is not limited and the SUN2000 can connect to the power grid at the rated power.

Grid connection with zero power

Closed-loop controller ● If multiple SUN2000s are

cascaded, set this parameter to SDongle/SmartLogger.

● If there is only one SUN2000, set this parameter to Inverter.

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Parameter Name Description

Limitation mode Total power indicates export

limitation of the total power at the grid-tied point.

Power adjustment period

Power control hysteresis

Active power output limit for fail-safe

Communication disconnection fail-safe

Species the shortest interval for a single anti-backfeeding adjustment.

Species the dead zone for adjusting the SUN2000 output power. If the power uctuation is within the power control hysteresis, the power is not adjusted.

Species the derating value of the SUN2000 active power by percentage. If the Smart Dongle does not detect any meter data or the communication between the Smart Dongle and the SUN2000 is disconnected, the Smart Dongle delivers the derating value of the SUN2000 active power by percentage.

In the SUN2000 anti-backfeeding scenario, if this parameter is set to Enable, the SUN2000 will derate according to the active power derating percentage when the communication between the SUN2000 and the Smart Dongle is disconnected for a period longer than

Communication disconnection detection time.

Communication disconnection detection time

Species the time for determining the communication disconnection between the SUN2000 and the Dongle.

This parameter is displayed when

Communication disconnection failsafe is set to Enable.

Grid connection with limited power (kW)

Closed-loop controller ● If multiple SUN2000s are

cascaded, set this parameter to SDongle/SmartLogger.

● If there is only one SUN2000, set this parameter to Inverter.

Limitation mode Total power indicates export

limitation of the total power at the grid-tied point.

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Parameter Name Description

Maximum grid feed-in power

Power adjustment period

Power control hysteresis

Active power output limit for fail-safe

Communication disconnection fail-safe

Species the maximum active power transmitted from the grid-tied point to the power grid.

Species the shortest interval for a single anti-backfeeding adjustment.

Species the dead zone for adjusting the SUN2000 output power. If the power uctuation is within the power control hysteresis, the power is not adjusted.

Communication disconnection detection time.

Communication disconnection detection time

Species the time for determining the communication disconnection between the SUN2000 and the Dongle.

This parameter is displayed when

Communication disconnection failsafe is set to Enable.

Grid connection with limited power (%)

Closed-loop controller ● If multiple SUN2000s are

cascaded, set this parameter to SDongle/SmartLogger.

● If there is only one SUN2000, set this parameter to Inverter.

Limitation mode Total power indicates export

limitation of the total power at the grid-tied point.

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Parameter Name Description

PV plant capacity Species the total maximum active

power in the SUN2000 cascading scenario.

Maximum grid feed-in power

Power adjustment period

Power control hysteresis

Active power output limit for fail-safe

Communication disconnection fail-safe

Species the percentage of the maximum active power of the gridtied point to the PV plant capacity.

Species the shortest interval for a single anti-backfeeding adjustment.

Species the dead zone for adjusting the SUN2000 output power. If the power uctuation is within the power control hysteresis, the power is not adjusted.

Communication disconnection detection time.

Communication disconnection detection time

Species the time for determining the communication disconnection between the SUN2000 and the Dongle.

This parameter is displayed when

Communication disconnection failsafe is set to Enable.

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SUN2000-(2KTL-6KTL)-L1 User Manual 7 Man-Machine Interaction

Parameter Name Description

Shutdown at high feed-in

power

Shutdown at high feed-in power ● The default value is Disable.

● If this parameter is set to Enable, the inverter shuts down for protection when the gridconnection point power exceeds the threshold and remains in this condition for the

specied time

threshold.

Upper feed-in power threshold for inverter shutdown

● The default value is 0. This parameter species the power threshold of the grid-connection point for triggering inverter shutdown.

High feed-in power duration threshold for triggering inverter shutdown

The default value is 20. This parameter species the duration threshold of high feed-in power for triggering inverter shutdown.

● When High feed-in power

duration threshold for triggering inverter shutdown is set to 5, Shutdown at high feed-in power

takes precedence.

● When High feed-in power

duration threshold for triggering inverter shutdown is set to 20, Limited feed-in takes precedence

(when Active power control is set to Limited feed-in).

Note a: This parameter is supported only for the AS4777 grid code.

----End

7.2.1.2 Apparent Power Control on the Inverter Output Side

On the home screen, tap Settings > Power adjustment to set inverter parameters.

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Figure 7-11 Apparent power control

Table 7-2 Apparent power

Parameter Description Value Range

Maximum apparent power (kVA)

Maximum active power (kW)

The lower threshold for the maximum apparent power is the maximum active power. To lower the maximum apparent power, lower the maximum active power rst.

7.2.1.3 Battery Control

Species the output upper threshold for the maximum apparent power to adapt to the capacity requirements of standard and customized inverters.

Species the output upper threshold for the maximum active power to adapt to dierent market requirements.

[Maximum active power, S

]

max

[0.1, P

max

]

Prerequisites

The screenshots in this chapter are taken in the SUN2000 3.2.00.011 app. The app is being updated. The actual screens may vary.

Function

When the inverter connects to a battery, add the battery and set battery parameters.

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Adding a Battery

To add a battery, choose Maintenance > Subdevice management on the home screen.

Figure 7-12 Adding a battery

Parameters Settings

On the home screen, choose Power adjustment > Battery control, and set the battery parameters and working mode.

Figure 7-13 Battery control parameter setting

Parameter

Description Value Range

Working mode For details, see the description

on the app screen.

● Maximum selfconsumption

● Time-of-use

● Fully fed to grid

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SUN2000-(2KTL-6KTL)-L1 User Manual 7 Man-Machine Interaction

Parameter Description Value Range

Maximum charge power (kW)

Maximum discharge power (kW)

End-of-charge SOC (%)

End-of-discharge SOC (%)

Charge from grid If Charge from grid function is

Retain this parameter to the maximum charge power. Additional conguration is not required.

Retain this parameter to the maximum discharge power. Additional conguration is not required.

Set the charge cuto capacity. 90%–100%

Set the discharge cuto capacity.

disabled by default, comply with the grid charge requirements stipulated in local laws and regulations when this function is enabled.

● Charge: [0, Maximum charge power]

● Discharge: [0, Maximum discharge power]

0%–20% (When no PV module is congured or the PV modules have no voltage for 24 hours, the minimum value is 15%.)

● Disable

● Enable

Grid charge cuto SOC

7.2.2 AFCI

Function

If PV modules or cables are not properly connected or damaged, electric arcs may occur, which may cause re. Huawei SUN2000s provide unique arc detection in compliance with UL 1699B-2018 to ensure the safety of users' lives and property.

This function is enabled by default. The SUN2000 automatically detects arc faults. To disable this function, log in to the FusionSolar app, enter the Device

Commissioning screen, choose Settings > Feature parameters, and disable AFCI.

Clearing Alarms

The AFCI function involves the DC arc fault alarm.

The SUN2000 has the AFCI alarm automatic clearance mechanism. If an alarm is triggered for less than clears the alarm. If the alarm is triggered for ve times or more within 24 hours, the SUN2000 locks for protection. You need to manually clear the alarm on the SUN2000 so that it can work properly.

Set the grid charge cuto SOC. [20%, 100%]

ve times within 24 hours, the SUN2000 automatically

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You can manually clear the alarm as follows:

● Method 1: FusionSolar App

Log in to the FusionSolar app and choose My > Device Commissioning. On the Device Commissioning screen, connect and log in to the SUN2000 that generates the AFCI alarm, tap Alarm management, and tap Clear on the right of the DC arc fault alarm to clear the alarm.

Figure 7-14 Alarm management

● Method 2: FusionSolar Smart PV Management System

Log in to the FusionSolar Smart PV Management System using a non-owner account, choose Maintenance > Alarm Management, select the DC arc fault alarm, and click Clear to clear the alarm.

Figure 7-15 Clearing alarms

Switch to the owner account with PV plant management rights. On the home page, click the PV plant name to go to the PV plant page, and click OK as prompted to clear the alarm.

7.2.3 IPS Check (for Italy CEI0-21 Grid Code Only)

Function

The Italy CEI0-21 grid code requires an IPS check for the SUN2000. During the self-check, the SUN2000 checks the protection threshold and protection time of the maximum voltage over 10 min (59.S1), maximum overvoltage (59.S2), minimum undervoltage (27.S1), minimum undervoltage (27.S2), maximum overfrequency (81.S1), maximum overfrequency (81.S2), minimum underfrequency (81.S), and minimum underfrequency (81.S2).

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Procedure

Step 1 On the home screen, choose Maintenance > IPS test to access the IPS test screen.

Step 2 Tap Start to start an IPS test. The SUN2000 detects maximum voltage over 10 min

(59.S1), maximum overvoltage (59.S2), minimum undervoltage (27.S1), minimum undervoltage (27.S2), maximum overfrequency (81.S1), maximum overfrequency (81.S2), and minimum underfrequency (81.S1), and minimum underfrequency (81.S2).

Figure 7-16 IPS test

Table 7-3 IPS test type

IPS Test Type

Maximum voltage over 10 min (59.S1)

Maximum overvoltage (59.S2)

Minimum undervoltage (27.S1)

Minimum undervoltage (27.S2)

Description

The default maximum voltage over 10 min protection threshold is 253 V (1.10 Vn), and the default protection time threshold is 3s.

The default overvoltage protection threshold is 264.5 V (1.15 Vn), and the default protection time threshold is 0.2s.

The default undervoltage protection threshold is 195.5 V (0.85 Vn), and the default protection time threshold is 1.5s.

The default undervoltage protection threshold is 34.5 V (0.15 Vn), and the default protection time threshold is 0.2s.

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IPS Test Type Description

Maximum overfrequency (81.S1)

Maximum overfrequency (81.S2)

Minimum underfrequency (81.S1)

Minimum underfrequency (81.S2)

Step 3 After the IPS test is complete, IPS State is displayed as IPS state success. Tap

Historical report in the upper right corner of the screen to view the IPS check

report.

----End

The default overfrequency protection threshold is 50.2 Hz, and the default protection time threshold is 0.1s.

The default overfrequency protection threshold is 51.5 Hz, and the default protection time threshold is 0.1s.

The default underfrequency protection threshold is 49.8 Hz, and the default protection time threshold is 0.1s.

The default underfrequency protection threshold is 47.5 Hz, and the default protection time threshold is 0.1s.

7.2.4 DRM (Australia AS4777)

Function

According to Australia AS 4777.2-2015, solar inverters need to support the function of demand response mode (DRM), and DRM0 is a mandatory requirement.

This function is disabled by default.

Figure 7-17 Wiring diagram for the DRM function

The demand response enabling device (DRED) is a power grid dispatch device.

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Table 7-4 DRM requirements

Mode Port on the SUN2000 Requirements

Procedure

Step 1 On the home page, choose Settings > Feature parameters.

Step 2 Set DRM to .

DRM0 DI1 and GND of the COM

port

Figure 7-18 DRM

● When switches S0 and S9 are switched on, the solar inverter should be turned o.

● When switch S0 is switched o, and switch S9 is switched on, the solar inverter should be grid-tied.

----End

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SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

8 System Maintenance

8.1 System Power-O

Precautions

Procedure

Step 1 Send a shutdown command on the app.

Step 2 Turn o the AC switch between the SUN2000 and the power grid.

Step 3 Turn o the DC switch at the bottom of the SUN2000.

Step 4 (Optional) Install the locking screw for the DC switch.

After the SUN2000 powers o, the remaining electricity and heat may still cause electric shocks and body burns. Therefore, put on protective gloves and begin operating the SUN2000

Figure 8-1 Installing a locking screw for the DC switch

ve minutes after the power-o.

Step 5 Turn o the DC switch between the SUN2000 and PV strings.

Step 6 (Optional) Turn o the battery switch between the SUN2000 and batteries.

----End

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SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

8.2 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 SUN2000, connecting cables, and maintaining the grounding reliability, power

Table 8-1 Maintenance checklist

Check Item Check Method Maintenance

o the SUN2000 (see 8.1 System Power-O for details).

Interval

System cleanliness

System running status

Electrical connection

Grounding reliability

Check periodically that the heat sinks are free from obstacles and dust.

● Check that the SUN2000 is not damaged or deformed.

● Check that the SUN2000 operates with no abnormal sound.

● Check that all SUN2000 parameters are correctly set during operation.

● Check that cables are secured.

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

● Check that unused DC input terminals, battery terminals, COM ports, ANT ports, and Smart Dongle waterproof covers are locked.

Check that ground cables are securely connected.

Once every 6 to 12 months

Once every six months

The rst inspection is 6 months after the initial commissioning. From then on, the interval can be 6 to 12 months.

8.3 Troubleshooting

Alarm severities are

dened as follows:

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SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

● Major: The SUN2000 enters the shutdown mode or functions abnormally after a fault occurs.

● Minor: Some components are faulty but the SUN2000 can still connect to the power grid and generate power.

● Warning: The SUN2000 functions normally, but its output power decreases due to external factors.

Table 8-2 Common alarms and troubleshooting measures

AlarmIDAlarm Name Alarm

Possible Causes Troubleshooting

Severity

2001 High String

Input Voltage

Major The PV array is not properly

congured. Excessive PV modules are connected in series to the PV string, and therefore the open-circuit voltage exceeds the maximum SUN2000 operating voltage.

Cause ID = 1, 2

● 1: The PV1 input voltage is high.

● 2: The PV2 input voltage is high.

2002 DC Arc Fault Major The PV string power cables

arc or are in poor contact.

Cause ID = 1, 2

● 1: PV1 DC arc fault

● 2: PV2 DC arc fault

Check the serial connection conguration of the PV string and ensure that the PV string open-circuit voltage is not greater than the maximum operating voltage of the SUN2000. After the PV array conguration is corrected, the alarm disappears.

Check whether the string cables arc or are in poor contact.

2011 String Reversed Major The PV string is reversely

connected.

Cause ID = 1, 2

Check whether the PV string is reversely connected to the SUN2000. If yes, wait until the PV

2021 AFCI Check

Failure

● 1: PV1 is reversely connected.

● 2: PV2 is reversely connected.

Major The AFCI check fails.

Cause ID = 1, 2

string current decreases below 0.5 A, set DC switch to OFF, and adjust the PV string polarity.

Turn o the AC output switch and DC input switch, and then turn them on

● 1: The AFCI check circuit is abnormal.

● 2: The AFCI circuit is faulty.

after 5 minutes. If the fault persists, contact your dealer or Huawei technical support.

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SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

AlarmIDAlarm Name Alarm

Possible Causes Troubleshooting

Severity

2032 Grid Failure Major Cause ID = 1

● The power grid experiences an outage.

● The AC circuit is disconnected or the AC circuit breaker is OFF.

2033 Grid

Undervoltage

Major Cause ID = 1

The grid voltage is below the lower threshold or the low voltage duration has lasted for more than the

specied by low

value voltage ride-through (LVRT).

1. Check the AC voltage.

2. Check whether the AC circuit is disconnected or the AC circuit breaker is OFF.

1. If the alarm occurs occasionally, 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 power grid voltage is within the allowed range. If no, contact the local power operator. If yes, modify the grid undervoltage protection threshold through the mobile app, SmartLogger, or network management system (NMS) with the consent of the local power operator.

3. If the fault persists for a long time, check the connection between the AC switch and the output power cable.

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SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

AlarmIDAlarm Name Alarm

Severity

2034 Grid

Major Cause ID = 1

Overvoltage

Possible Causes Troubleshooting

1. If the alarm occurs

The grid voltage exceeds the higher threshold or the high voltage has lasted for more than the value specied by high voltage ride-through (HVRT).

occasionally, 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 power grid voltage is within the allowed range. If no, contact the local power operator. If yes, modify the grid overvoltage protection threshold through the mobile app, SmartLogger, or NMS with the consent of the local power operator.

3. Check whether the peak voltage of the power grid is too high. If the fault persists and cannot

rectied for a long

be time, contact the power operator.

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SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

AlarmIDAlarm Name Alarm

Severity

2036 Grid

Major Cause ID = 1

Overfrequency

Possible Causes Troubleshooting

1. If the alarm occurs

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

occasionally, 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 power grid frequency is within the allowed range. If no, contact the local power operator. If yes, modify the grid overfrequency protection threshold through the mobile app, SmartLogger, or NMS with the consent of the local power operator.

2037

Grid Underfrequenc y

Major Cause ID = 1

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

1. If the alarm occurs occasionally, 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 power grid frequency is within the allowed range. If no, contact the local power operator. If yes, modify the grid underfrequency protection threshold through the mobile app, SmartLogger, or NMS with the consent of the local power operator.

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SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

AlarmIDAlarm Name Alarm

Severity

2038 Unstable Grid

Major Cause ID = 1

Frequency

2039 Output

Major Cause ID = 1

Overcurrent

Possible Causes Troubleshooting

1. If the alarm occurs

Power grid exception: The actual grid frequency change rate does not comply with the local power grid standard.

occasionally, 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 power grid frequency is within the allowed range. If no, contact the local power operator.

1. The SUN2000 detects its

The power grid voltage drops dramatically or the power grid is shortcircuited. As a result, the SUN2000 transient output current exceeds the upper threshold and therefore the SUN2000 protection is triggered.

external working conditions in real time. After the fault is rectied, the SUN2000 automatically recovers.

2. If the alarm occurs frequently and the energy yield of the power plant, check whether the output is short-circuited. If the fault persists, contact your dealer or Huawei technical support.

aects

2040 Output DC

Component Overhigh

Major Cause ID = 1

The DC component of the SUN2000 output current exceeds the specied upper threshold.

1. The SUN2000 detects its external working conditions in real time. After the fault is rectied, the SUN2000 automatically recovers.

2. If the alarm occurs frequently, contact your dealer or Huawei technical support.

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SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

AlarmIDAlarm Name Alarm

Severity

2051 Abnormal

Major Cause ID = 1 Residual Current

2062 Low Insulation

Major Cause ID = 1 Resistance

Possible Causes Troubleshooting

1. If the alarm occurs

The insulation impedance of the input side to PE decreases when the SUN2000 is operating.

occasionally, the external circuit may be abnormal temporarily. The SUN2000 automatically recovers after the fault is

rectied.

2. If the alarm occurs frequently or persists, check whether the impedance between the PV string and the ground is too low.

1. Check the output

● A short circuit occurs between the PV array and the ground.

impedance of the PV array to ground. If there is a short circuit or lack of insulation, rectify it.

● The ambient air of the PV array is damp and the insulation between the PV array and the ground is poor.

2. Check that the PE cable of the SUN2000 is correctly connected.

3. If the impedance is lower than the protection threshold in rainy and cloudy days, set Insulation

resistance protection

using the mobile app, SmartLogger, or NMS. Current insulation resistance: x MΩ, possible short circuit position: x%. The short circuit position is valid for a single PV string. If there are multiple PV strings, check the PV strings one by one. For details, see E Locating

Insulation Resistance Faults.

specied

Page 94

SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

AlarmIDAlarm Name Alarm

Possible Causes Troubleshooting

Severity

2063 OvertemperatureMinor Cause ID = 1

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

● The ambient temperature is higher than the upper threshold.

● The SUN2000 is not working properly.

● Check the ventilation and ambient temperature of the SUN2000 installation position.

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

● If the ventilation and ambient temperature both meet requirements, contact your dealer or Huawei technical support.

Page 95

SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

AlarmIDAlarm Name Alarm

Possible Causes Troubleshooting

Severity

2064 Device Fault Major An unrecoverable fault has

occurred on a circuit inside the SUN2000.

Cause ID = 1–12

● 1: The Boost input is short-circuited.

● 2: The Boost input experiences overcurrent.

● 3: The control circuit is faulty.

● 4: The inverter circuit is abnormal.

● 5: The residual current sensor is faulty.

● 6: The temperature detection fails.

● 7: EEPROM read/write fails.

● 8: The auxiliary power supply is abnormal.

● 9: The grid-tied relay is abnormal.

● 10: The DC bus experiences overvoltage.

● 11: The DC bus experiences undervoltage.

● 12: The DC bus experiences voltage imbalance.

Turn

o the AC output switch and DC input switch, and then turn them on after 5 minutes. If the fault persists, contact your dealer or Huawei technical support.

Page 96

SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

AlarmIDAlarm Name Alarm

Severity

2065 Upgrade Failed

Minor The upgrade does not or Version Mismatch

61440 Monitoring

Minor Cause ID = 1 Unit Faulty

Possible Causes Troubleshooting

1. Perform an upgrade

complete normally.

Cause ID = 1–4, 7

● 1. The software and hardware of the main controller do not match.

again.

2. If the upgrade fails for multiple times, contact your dealer or Huawei technical support.

● 2: The main and auxiliary controller software versions do not match.

● 3: The monitoring and power controller software versions do not match.

● 4: The upgrade fails.

● 7: The optimizer upgrade fails.

Turn o the AC output

● The ash memory is

insucient.

switch and DC input switch, and then turn them on after 5 minutes. If the fault

● The ash memory has bad sectors.

persists, replace the monitoring board or contact your dealer Huawei technical support.

2067 Faulty Power

Collector

Major Cause ID = 1

The smart power sensor is disconnected.

1. Check that the congured power meter model is the same as the actual model.

2. Check that the communications parameters for the smart power sensors are the same as the SUN2000 RS485

congurations.

3. Check whether the smart power sensor is powered on and whether the RS485 communications cable is connected.

Page 97

SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

AlarmIDAlarm Name Alarm

Severity

2068 Battery

Minor The battery is faulty,

Abnormal

Possible Causes Troubleshooting

1. If the battery fault

disconnected, or the battery circuit breaker is OFF when the battery is running.

Cause ID = 1–4

● 1: The battery communication is abnormal.

indicator is steady on or blinking, contact the battery supplier.

2. Check that the battery enabling/power/ communications cable is correctly installed, and that the communications

● 2: The battery port experiences overcurrent.

● 3. The battery enabling cable is not properly connected.

● 4: The battery port voltage is abnormal.

parameters are the same as the SUN2000 RS485

congurations.

3. Check that the auxiliary power switch on the battery is set to ON.

4. Send a shutdown command on the app.

o the AC output

Turn switch, DC input switch, and battery switch. Then turn on the battery switch, AC output switch, and DC input switch in sequence after 5 minutes.

5. If the fault persists, contact your dealer or Huawei technical support.

2070

Active Islanding Major Cause ID = 1

When the power grid experiences an AC power

Check that the grid connection voltage of the SUN2000 is normal.

outage, the SUN2000 detects islanding proactively.

2077 O-grid output

overload

Major Cause ID = 1/2

The output is overloaded or short-circuited.

1. Check whether the device output is shortcircuited.

2. Check whether the device load conguration exceeds the rated value.

Page 98

SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

AlarmIDAlarm Name Alarm

Severity

2080 Abnormal PV

Major PV module conguration

Module

Conguration

Possible Causes Troubleshooting

Check whether the total does not meet requirements, or the PV module output is reversely connected or shortcircuited.

Cause ID = 2, 3, 6, 7, 8, 9

number of PV modules,

number of PV modules in a

string, and number of PV

strings meet requirements

and whether the PV

module output is reversely

connected.

● 2: The PV string power

or the number of optimizers connected in series in a PV string exceeds the upper threshold.

● ID2: Check whether the PV string power or the number of PV modules connected in series in the PV string exceeds the upper threshold.

● 3: The number of optimizers connected in series in a PV string is less than the lower threshold, the PV string output is reversely connected, or the output of some optimizers in the PV string is reversely connected.

● 6: Under the same MPPT, the number of optimizers connected in series in PV strings connected in parallel is dierent, or the output of some optimizers in PV strings is reversely connected.

● 7: The optimizer installation position is changed, or PV strings are combined or exchanged.

● 8: The sunlight is weak or changes abnormally.

● 9: In partial conguration scenarios, the PV string voltage exceeds the inverter input voltage

specications.

● ID3:

1. Check whether the number of optimizers connected in series in the PV string is below the lower threshold.

2. Check whether the PV string output is reversely connected.

3. Check whether the PV string output is disconnected.

4. Check whether the optimizer output extension cable is correct (positive connector at one end and negative connector at the other).

● ID6:

1. Check whether the number of optimizers connected in series in the PV strings connected in parallel under the same MPPT is the same.

2. Check whether the optimizer output extension cable is correct (positive connector at one end and negative connector at the other).

Page 99

NO TE

SUN2000-(2KTL-6KTL)-L1 User Manual 8 System Maintenance

AlarmIDAlarm Name Alarm

Possible Causes Troubleshooting

Severity

2081 Optimizer Fault Warning Cause ID = 1

An optimizer is faulty.

● ID7: When the sunlight is normal, perform the optimizer search function again.

● ID8: When the sunlight is normal, perform the optimizer search function again.

● ID9: Calculate the PV string voltage based on the number of PV modules in the PV string and check whether the PV string voltage exceeds the upper threshold of the inverter input voltage.

Go to the optimizer information screen to view the fault details.

2082 Grid-tied/O-

grid Controller Abnormal

Major Cause ID = 1

The inverter fails to communicate with the Smart Backup Box.

Cause ID = 2

An unrecoverable fault occurs on a circuit inside the Smart Backup Box.

1. Send a shutdown command on the app. Turn o the AC output switch, DC input switch, and battery switch.

2. Check whether the power cable and RS485 cable between the Smart Backup Box and the inverter are normal.

3. After 5 minutes, turn on the battery switch, AC output side, AC output switch, and DC input switch.

4. If the alarm persists, contact your dealer or Huawei technical support.

Contact your dealer if all failure analysis procedures listed above are completed and the fault still exists.

Page 100

SUN2000-(2KTL-6KTL)-L1 User Manual 9 SUN2000 Disposal

9 SUN2000 Disposal

9.1 Removing a SUN2000

Procedure

Step 1 Power

Step 2 Disconnect all cables from the SUN2000, including signal cables, DC input power

cables, battery cables, AC output power cables, and PE cables.

Step 3 Remove the WLAN antenna or the Smart Dongle from the SUN2000.

Step 4 Remove the SUN2000 from the mounting bracket.

Step 5 Remove the mounting bracket.

----End

o the SUN2000. For details, see 8.1 System Power-O.

9.2 Packing a SUN2000

● If the original packaging is available, put the SUN2000 inside it and then seal it using adhesive tape.

● If the original packaging is unavailable, put the SUN2000 inside a suitable hard carton and seal it properly.

9.3 Disposing a SUN2000

If the SUN2000 service life expires, dispose the SUN2000 according to the local disposal rules for electrical equipment and electronic component waste.