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

SUN2000-(2KTL-6KTL)-L1

User Manual

Issue

Date

2020-07-20

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 specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.

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

Huawei Technologies Co., Ltd.

Address:

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

Website:

https://e.huawei.com

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

About This Document

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iii

Purpose

Symbol

Description

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

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

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

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

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

About This Document

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 defined as follows.

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About This Document

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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 03 (2020-07-20)



Updated 5.1 Preparing Cables.



Updated 10.1 SUN2000 Technical Specifications



Updated A Grid Code.



Updated C Resetting Password.



Updated D Rapid Shutdown.

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.



Updated C Resetting Password.

Issue 01 (2020-04-17)

This issue is the first official release.

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Contents

About This Document .............................................................................................................. iii

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 ................................................................................................................................................................. 14

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 ................................................................................................................................................................ 24

4.5 Installing a SUN2000 ............................................................................................................................................................ 25

4.5.1 Wall-Mounted Installation .............................................................................................................................................. 26

4.5.2 Support-Mounted Installation ........................................................................................................................................ 28

5 Electrical Connection ........................................................................................................... 32

5.1 Preparing Cables ..................................................................................................................................................................... 33

5.2 Connecting PE Cables ........................................................................................................................................................... 37

5.3 (Optional) Installing a Smart Dongle ............................................................................................................................. 39

5.4 Installing a WLAN Antenna ................................................................................................................................................ 41

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5.5 Connecting an AC Output Power Cable ......................................................................................................................... 42

5.6 Connecting DC Input Power Cables ................................................................................................................................. 46

5.7 (Optional) Connecting Battery Cables ........................................................................................................................... 50

5.8 (Optional) Connecting Signal Cables .............................................................................................................................. 53

6 System Commissioning ....................................................................................................... 61

6.1 Verification Before Power-On ............................................................................................................................................ 61

6.2 System Power-On ................................................................................................................................................................... 62

7 Man-Machine Interaction ................................................................................................... 65

7.1 App Commissioning ............................................................................................................................................................... 65

7.1.1 Downloading the FusionSolar App ............................................................................................................................... 65

7.1.2 (Optional) Registering an Installer Account ............................................................................................................. 66

7.1.3 Creating a PV Plant and a User ..................................................................................................................................... 67

7.1.4 (Optional) Setting the Physical Layout of the Smart PV Optimizers .............................................................. 68

7.2 Parameters Settings .............................................................................................................................................................. 70

7.2.1 Energy Control ..................................................................................................................................................................... 71

7.2.1.1 Grid-tied Point Control .................................................................................................................................................. 71

7.2.1.2 Battery Control ................................................................................................................................................................. 74

7.2.2 AFCI .......................................................................................................................................................................................... 80

7.2.3 IPS Check (for Italy CEI0-21 Grid Code Only) .......................................................................................................... 81

7.2.4 DRM (Australia AS4777) .................................................................................................................................................. 83

8 System Maintenance ........................................................................................................... 86

8.1 System Power-Off .................................................................................................................................................................. 86

8.2 Routine Maintenance ............................................................................................................................................................ 87

8.3 Troubleshooting ...................................................................................................................................................................... 88

9 SUN2000 Disposal ................................................................................................................ 99

9.1 Removing a SUN2000 ........................................................................................................................................................... 99

9.2 Packing a SUN2000 ............................................................................................................................................................... 99

9.3 Disposing a SUN2000 ........................................................................................................................................................... 99

10 Technical Parameters ..................................................................................................... 100

10.1 SUN2000 Technical Specifications .............................................................................................................................. 100

10.2 Optimizer Technical Specifications ............................................................................................................................. 106

A Grid Code ............................................................................................................................ 108

B Device Commissioning ..................................................................................................... 112

C Resetting Password ........................................................................................................... 116

D Rapid Shutdown ................................................................................................................ 119

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E Locating Insulation Resistance Faults .......................................................................... 120

F Acronyms and Abbreviations .......................................................................................... 124

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1.1 General Safety

Statement

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

1 Safety Information

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

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

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

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



Operation beyond the conditions specified in this document



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



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



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



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



Damage caused during transportation by the customer

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

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



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



Tighten the screws using tools when installing the equipment.



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



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



Do not open the host panel of the equipment.

Personal Safety



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



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



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

1.2 Personnel Requirements



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



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

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



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



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



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



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



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

1.3 Electrical Safety

Grounding



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



Do not damage the ground conductor.



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



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

General Requirements

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



Ensure that all electrical connections comply with local electrical standards.



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



Ensure that the cables you prepared meet local regulations.

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

AC and DC Power

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



Use dedicated insulated tools when performing high-voltage operations.

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

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

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

Cabling



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



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



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

1.4 Installation Environment Requirements



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



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



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

1.5 Mechanical Safety

Using Ladders



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

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



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



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



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



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

− Keep your body steady.

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

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

the ladder.

Drilling Holes

When drilling holes into a wall or floor, observe the following safety precautions:



Wear goggles and protective gloves when drilling holes.



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

Moving Heavy Objects



Be cautious to avoid injury when moving heavy objects.

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

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

1.6 Commissioning

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

1.7 Maintenance and Replacement

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



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



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



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



If the equipment is faulty, contact your dealer.



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

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2.1 Overview

Function

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.

2 Product Introduction

Model

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 identifier (using SUN2000-5KTL-L1 as an example)

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Table 2-1 Identifier description

No.

Meaning

Value

Series name

SUN2000: grid-tied solar inverter

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.

Topology

TL: transformerless

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 configuration)

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

(A) PV string

(B) Smart PV optimizer

(D) SUN2000

(E) AC switch

(F) Residential PDU

(G) Smart Power Sensor

(H) Residential power meter

(I) Power grid (J) Battery

(K) Battery switch

(L) Household load

(M) FusionSolar app

(N) 4G Smart Dongle

(O) WLAN-FE Smart Dongle

(P) Router

(Q) FusionSolar Smart PV Management System



indicates the power flow 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 figure) can 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.

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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.

Figure 2-4 Power grid types

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2.2 Component Description

(1) LED indicators

(2) Front panel

(3) Hanging kit

(4) Mounting bracket

(5) Heat sink

(6) Ventilation valve

(7) DC switch locking screw holea

(8) DC switchb (DC SWITCH)

(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

Appearance

Figure 2-5 Appearance



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.

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2.3 Label Description

Icon

Name

Meaning

Burn warning

Do not touch a running SUN2000 because the enclosure is hot when the SUN2000 is running.

Delayed discharge



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



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

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.

Enclosure Labels

Table 2-2 Enclosure label description

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Icon

Name

Meaning

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.

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).

Nameplate

The labels are for reference only.

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

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(1) Trademark and model

(2) Key technical specifications

(3) Compliance symbols

(4) Company name and country of origin

The nameplate figure is for reference only.

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

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Working Mode

Working mode

Description

Standby mode

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 operation conditions are met, the SUN2000 enters Operating mode.



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

Figure 2-8 Working modes

Table 2-3 Working mode description

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Working mode

Description

Operating 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 rectified or the startup command is executed, the SUN2000 enters Standby mode.

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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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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 in the packing case.

Packing List

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Type

Tools and Instruments

Installation

Hammer drill (with a drill bit of 8 mm)

Torque socket wrench

Torque wrench Diagonal pliers

Wire strippers

Torque screwdriver

Rubber mallet

Utility knife

Cable cutter

Crimping tool (model: PV-CZM-22100)

Cord end terminal crimper

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

Cable tie

Vacuum cleaner

Multimeter (DC voltage measurement range ≥ 600 V DC)

4.2 Preparing Tools and Instruments

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Type

Tools and Instruments

Marker

Steel measuring tape

Level

Hydraulic pliers

Heat-shrink tubing

Heat gun

Personal protective equipment (PPE)

Safety gloves

Safety goggles

Anti-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 flammable 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 fire. 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

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prone to sea breeze vary with weather conditions (such as typhoons and monsoons) or terrains (such as dams and hills).

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 fire resistant.



Do not install the SUN2000 on flammable 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.

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.

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

4 System Installation

Issue 03 (2020-07-20)

Ltd.

Figure 4-1 Installation angle

Installation Space Requirements



Reserve enough clearance around the SUN2000 to ensure sufficient space for installation and heat dissipation.

Figure 4-2 Installation space



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

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