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

SUN2000-(2KTL-6KTL)-L1

User Manual

Issue

03

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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About This Document

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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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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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1 Safety Information

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1.1 General Safety

Statement

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

1 Safety Information

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

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

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

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



Operation beyond the conditions specified in this document



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



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



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



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



Damage caused during transportation by the customer

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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

1

Series name

SUN2000: grid-tied solar inverter

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 configuration)

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

(A) PV string

(B) Smart PV optimizer

(C) DC switch

(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.

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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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Figure 4-3 Horizontal installation mode (recommended)

Figure 4-4 Triangle installation mode (recommended)

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Figure 4-5 Stacked installation mode (not recommended)

The installation figures 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.

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Figure 4-7 Mounting bracket dimensions

(1) Bolt

(2) Nut

(3) Spring washer

4.5.1 Wall-Mounted Installation

Procedure

Step 1 Determine the positions for drilling holes using the marking-off 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.

Figure 4-8 Expansion bolt composition

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(4) Flat washer

(5) Expansion sleeve



To prevent dust inhalation or contact with eyes, wear safety goggles and an anti-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 flat washer. Otherwise, the mounting bracket will not be securely installed on the wall.



Loosen the nut, spring washer, and flat washer of the expansion bolt at the bottom.

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.

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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.

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-off template, and then

mark the positions with a marker.

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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.

Figure 4-14 Drilling holes

Step 3 Secure the mounting bracket.

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

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

Figure 4-15 Installing a locking screw for the DC switch

Step 5 Install the SUN2000 on the mounting bracket. Step 6 Tighten the bolt assemblies.

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Figure 4-16 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 4-17 Installing an anti-theft lock

----End

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Precautions

5 Electrical Connection

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 certified 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 specifications (green-and-yellow cables are only used for PE).

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5.1 Preparing Cables

No.

Component

Description

Source

A

PV string



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



The SUN2000 supports the input from two PV strings.

Prepared by the customer

B

Smart PV optimizer

The SUN2000-450W-P smart PV optimizer is supported.

Purchased from Huawei

C

DC 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

Prepared by the customer

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

Table 5-1 Component description

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No.

Component

Description

Source

D

Battery

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

Prepared by the customer

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

Prepared by the customer

F

Smart Donglea

Supported models:



WLAN-FE Smart Dongle: SDongleA-05



4G Smart Dongle: SDongleA-03

Purchased from Huawei

G

Smart Power Sensor b

The SUN2000 can connect to the DDSU666-H and DTSU666-H smart power sensors.

Purchased from Huawei

The following third-party meters are also supported: GAVAZZI-EM340-DIN AV2 3 X S1 X, GAVAZZI-EM111-DIN AV8 1 X S1 X, GAVAZZI-EM112-DIN AV0 1 X S1 X, CCS-WNC-3Y-400-MB, and CCS-WNC-3D-240-MB.

Prepared by the customer

H

SUN2000

Select a proper model as required.

Purchased from Huawei

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No.

Component

Description

Source

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 (SUN2000-2KTL-L1)



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



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

Prepared by the customer



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

SDongleA-03 Quick Guide (4G)

. For details about how to use the WLAN-FE

Smart Dongle SDongleA-05, see the

SDongleA-05 Quick Guide (WLAN-FE)

. You can obtain these documents at https://support.huawei.com/enterprise by searching for models.



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

No.

Cable

Type

Recommended Specifications

Source

1

DC input power cable

Common outdoor PV cable in the industry



Conductor cross-sectional area: 4–6 mm2



Cable outer diameter: 5.5–9 mm

Prepar ed by the custom er

2

(Option al) Battery cable

Common outdoor PV cable in the industry



Conductor cross-sectional area: 4–6 mm2



Cable outer diameter: 5.5–9 mm

Prepar ed by the custom er

Table 5-2 Cable description

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No.

Cable

Type

Recommended Specifications

Source

3

(Option al) Signal cable

Outdoor shielded twisted pair cable



Conductor cross-sectional area:

− Combined

crimping of cables on the port: 0.20–0.35 mm2

− Crimping the

cables on the port without combining them:

0.20–1 mm2



Cable outer diameter:

− 4-hole rubber

plug: 4–8 mm

− 2-hole rubber

plug: 8–11 mm

Prepar ed by the custom er

4

AC output power cablea



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



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



Conductor cross-sectional area: 4–6 mm2



Cable outer diameter: 10–21 mm

Prepar ed by the custom er

5

PE cable

Single-core outdoor copper cable and M6 OT terminal

4–10 mm2

Prepar ed by the custom er

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.

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

The factors that affect 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.

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 confirmation.



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:

− The PE cable is a single-core outdoor copper cable with a conductor

cross-sectional area of at least 10 mm2.

− 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.

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Procedure

(A) Core wire

(B) Insulation layer

(C) Heat shrink tubing

(D) Hydraulic pliers

(E) Heat gun

Step 1 Crimp an OT terminal.



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.



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.

Figure 5-2 Crimping an OT terminal

Step 2 Connect the PE cable.

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

Ensure that the PE cable is connected securely.



It is recommended to use the right ground point for grounding, and the other is a reserved ground point.

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.

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

4G Smart Dongle (4G Communication)

Figure 5-4 Installing a 4G Smart Dongle



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)

document.

. You can also scan the QR code to obtain the

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

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

Quick Guide (4G)

The quick guide is delivered with the Smart Dongle.

. You can also scan the QR code to obtain the document.

5.4 Installing a WLAN Antenna

Procedure

Step 1 Remove the watertight cap from the ANT port.

SDongleA-03

Step 2 Install the washer to the ANT port on the chassis. Step 3 Install the WLAN antenna.

Ensure that the WLAN antenna is installed securely.

Figure 5-6 Installing a WLAN antenna

----End

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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.

Procedure

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

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

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 figures 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.

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Ensure that the AC connector is connected securely.

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.

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

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 affected.

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

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

(1) Terminals of DC input 1

(2) Terminals of DC input 2

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.



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.

Procedure

Step 1 Assemble a DC connector.

Figure 5-13 DC input terminals

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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.



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

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

If the PV string is not configured 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 configured to the same string. Remove some PV modules.



If the PV string is configured 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.

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

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If the DC input power cable is reversely connected and the DC switch is set to ON, do not immediately turn off 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.

Figure 5-16 Removing a DC connector

5.7 (Optional) Connecting Battery Cables

Prerequisites

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

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



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 affected. 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 battery switch can be configured between the SUN2000 and the battery to ensure that the SUN2000 can be safely disconnected from the battery.

Procedure

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 fire could happen.



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.

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

Input Power Cables.

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

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.

Figure 5-17 Connecting battery cables

----End

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5.8 (Optional) Connecting Signal Cables

No.

Label

Definition

Single SUN2000 Scenario

SUN2000 Cascading Scenario

1

485B1

RS485B, RS485 differential signal–

-

Used for connecting to the solar inverters.

2

485A1

RS485A, RS485 differential signal+

3

485B2

RS485B, RS485 differential signal–

Used for connecting to the RS485 signal ports of the battery

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

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

Table 5-3 COM port definition

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No.

Label

Definition

Single SUN2000 Scenario

SUN2000 Cascading Scenario

4

485A2

RS485A, RS485 differential signal+

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

smart power sensor. When both battery and smart power sensor are configured, they need be crimped to the 485B2 and 485A2 ports.

5

GND

GND of the enable signal/12V/DI1/ DI2

Used for connecting to GND of the enable signal/12V/DI1/DI2. 6

EN+

Enable signal+/12V+

Used for connecting to the enable signal of the battery and the 12V positive signal.

7

DI1

Digital input signal 1+

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.

Communication Networking Mode

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



Single SUN2000 scenarios

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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.

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Procedure

Step 1 Connect signal cables to corresponding signal connectors.



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 installed with the Smart Dongle.



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



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

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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6 System Commissioning

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.

6.1 Verification Before Power-On

Table 6-1 Check items and acceptance criteria

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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 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.

power switch of the battery and then the battery switch.

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

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

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Table 6-2 LED indicators 1

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7 Man-Machine Interaction

7.1 App Commissioning

7.1.1 Downloading the FusionSolar App

Search for FusionSolar in Google Play (Android) to download and install the app. You can also scan one of the following QR codes to obtain the app.

Figure 7-1 QR code



The latest Android version must be used for device commissioning. The iOS version is not updated and can be used only for viewing PV plant information. For iOS users, you can search for FusionSolar in the App Store or scan the following QR code to download the iOS version.



The screenshots are for reference only. The actual screens prevail.

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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 first installer account and create a domain named after the company name.

Figure 7-2 Creating the first installer account

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

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Figure 7-3 Creating multiple installer accounts for the same company

7.1.3 Creating a PV Plant and a User

Figure 7-4 Creating a PV plant and a user

For details about how to use the site deployment wizard, see You can also scan the QR code to obtain the document.

FusionSolar App Quick Guide

.

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



If smart PV optimizers are configured 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

Guide

. You can also scan the QR code to obtain the document.

FusionSolar App Quick

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 Plant layout, tap , and upload the physical layout template photo as prompted.

Figure 7-5 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 Plant layout, click Add Physical Layout > , and upload the physical layout template photo.

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Figure 7-6 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 Homepage page, click the plant name to go to the plant page. Select Plant layout. Choose > Generate with AI, and create

a physical layout as prompted. You can also manually create a physical location layout.

Figure 7-7 Physical layout design of PV modules

----End

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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 > Physical layout design of PV modules. The Physical layout design of PV modules 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 identified 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 7-8 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

obtain the document.

. You can also scan the QR code to

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7.2.1 Energy Control

Parameter Name

Description

Active power

Unlimited

-

If this parameter is set to Unlimited, the output power of the SUN2000 is not limited and the SUN2000 can connect to the power grid at the rated power.

Grid connectio n with zero

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.

On the home screen, tap Power adjustment to perform the corresponding operation.

Figure 7-9 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

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Parameter Name

Description

power

Limitation mode

Total power indicates export limitation of the total power at the grid-tied point.

Power adjustment period

Specifies the shortest interval for a single anti-backfeeding adjustment.

Power control hysteresis

Specifies the dead zone for adjusting the SUN2000 output power. If the power fluctuation is within the power control hysteresis, the power is not adjusted.

Active power output limit for fail-safe

Specifies 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.

Communicatio n disconnection fail-safe

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.

Communicatio n disconnection detection time

Specifies the time for determining the communication disconnection between the SUN2000 and the Dongle.

This parameter is displayed when Communication disconnection fail-safe is set to Enable.

Grid connectio n 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.

Maximum grid feed-in power

Specifies the maximum active power transmitted from the grid-tied point to the power grid.

Power adjustment period

Specifies the shortest interval for a single anti-backfeeding adjustment.

Power control hysteresis

Specifies the dead zone for adjusting the SUN2000 output power. If the power fluctuation is within the power control hysteresis, the power is not adjusted.

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Parameter Name

Description

Active power output limit for fail-safe

Specifies 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.

Communicatio n disconnection fail-safe

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.

Communicatio n disconnection detection time

Specifies the time for determining the communication disconnection between the SUN2000 and the Dongle.

This parameter is displayed when Communication disconnection fail-safe is set to Enable.

Grid connectio n 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.

PV plant capacity

Specifies the total maximum active power in the SUN2000 cascading scenario.

Maximum grid feed-in power

Specifies the percentage of the maximum active power of the grid-tied point to the PV plant capacity.

Power adjustment period

Specifies the shortest interval for a single anti-backfeeding adjustment.

Power control hysteresis

Specifies the dead zone for adjusting the SUN2000 output power. If the power fluctuation is within the power control hysteresis, the power is not adjusted.

Active power output limit for fail-safe

Specifies 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.

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Parameter Name

Description

Communicatio n disconnection fail-safe

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.

Communicatio n disconnection detection time

Specifies the time for determining the communication disconnection between the SUN2000 and the Dongle.

This parameter is displayed when Communication

disconnection fail-safe is set to Enable.

----End

7.2.1.2 Battery Control

Function

If the SUN2000 connects to a battery, you need to set battery parameters.

Forcible Charge and Discharge

Step 1 On the home screen, choose Power adjustment > Battery control > Forced

charge/discharge and perform operations as required. Tap Submit.

Figure 7-11 Forced charge/discharge

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Table 7-2 Description of forced charge/discharge parameters

Parameter

Description

Value Range

Charge/Discharge

Specifies the forced charge/discharge manually.



Stop



Charge



Discharge

Forced charge/discharge power (kW)

Specifies the forced charge/discharge power.



Charge: [0, maximum charge power]



Discharge: [0, maximum discharge power]

Forced charge/discharge time (min)

Specifies the forced charge/discharge duration.

[0, 1440]

Remaining charge/discharge time (min)

It cannot be set, which means the remaining time of charge or discharge.

-

Control Mode

Step 1 On the home screen, choose Power adjustment > Battery control > Control mode

----End

and perform the required operation. Tap Submit.

Figure 7-12 Fixed charge/discharge

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Figure 7-13 Maximum self-consumption

Figure 7-14 Time-of-use

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Table 7-3 Description of battery control parameters

Parameter

Description

Value Range

Control mode



If this parameter is set to Fixed charge/discharge, the battery is charging or discharging during the configured period. A maximum of 10 time periods can be added.



If this parameter is set to Maximum self-consumption and the SUN2000 is connected to a smart power sensor, the SUN2000 provides output power for local loads before feeding the remaining power to the power grid.



If this parameter is set to Time-of-use, the battery is discharged when the electricity price is high and charged when the electricity price is low. A maximum of 10 time periods can be added.



Fixed charge/discharge



Maximum self-consumption



Time-of-use

----End

Charge from grid

Step 1 On the home screen, choose Power adjustment > Battery control > Charge from

grid.

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Figure 7-15 Charge from grid

Figure 7-16 End-of-discharge capacity

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Table 7-4 Description of the grid charge parameter

Parameter

Description

Value Range

Charge from grid



After Charge from grid is enabled:

− When the battery capacity is 2%

lower than the End-of-discharge capacity, the system forcibly

charges batteries from the power grid. The charging power is limited to 1 kW. When the battery capacity is 2% higher than End-of-discharge capacity, the system stops charging batteries from the power grid.

− Except the Maximum

self-consumption control mode, if the PV power is less than the preset charge power, the system charges batteries from the power grid. The charge power is limited to 2 kW. When the battery capacity is higher than Grid charge cutoff SOC, the system stops charging batteries from the power grid.



To set the discharge cutoff capacity, choose Maintenance > Add/Delete

device > Battery > End-of-discharge capacity on the

home screen. The value range is 12%–20%, as shown in Figure 7-16.



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



Disable



Enable

----End

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7.2.2 AFCI

Function

If PV modules or cables are incorrectly connected or damaged, electric arcs may be generated, which may cause fire. Huawei solar inverters provide arc detection meets the requirement of UL 1699B-2018, ensuring the user safety and property.

This function is enabled by default. The solar inverter 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.

For details about entering the Device Commissioning screen, see B Device

Commissioning.

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 five times within 24 hours, the SUN2000 automatically clears the alarm. If the alarm is triggered for more than five times within 24 hours, the SUN2000 locks for protection. You need to manually clear the alarm on the SUN2000 so that it can work properly.

You can manually clear the alarm as follows:

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.

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Figure 7-17 Alarm management

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).

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).

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Figure 7-18 IPS test

IPS Test Type

Description

Maximum voltage over 10 min (59.S1)

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

Maximum overvoltage (59.S2)

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

Minimum undervoltage (27.S1)

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

Minimum undervoltage (27.S2)

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

Maximum overfrequency (81.S1)

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

Table 7-5 IPS test type

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IPS Test Type

Description

Maximum overfrequency (81.S2)

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

Minimum underfrequency (81.S1)

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

Minimum underfrequency (81.S2)

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

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

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 7-19 Wiring diagram for the DRM function

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

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Mode

Port on the SUN2000

Requirements

DRM0

DI1 and GND of the COM port



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



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

Procedure

Step 1 On the home page, choose Settings > Feature parameters. Step 2 Set DRM to .

Table 7-6 DRM requirements

Figure 7-20 DRM

----End

DRM Configuration Guide for Standard AS NZS4777.2 with SmartLogger3000

If more Demand Response Modes (DRM0/5/6/7/8) are required, then the installer will need to connect the Huawei SmartLogger3000. Refer to the Huawei document SmartLogger3000 User Manual of how to connect the DRED and how to configure the inverter and SmartLogger for use with the DRED.

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8.1 System Power-Off

Precautions

8 System Maintenance

Procedure

Step 1 Send a shutdown command on the app. Step 2 Turn off the AC switch between the SUN2000 and the power grid. Step 3 Turn off the DC switch at the bottom of the SUN2000. Step 4 (Optional) Install the locking screw for the DC switch.

After the SUN2000 powers off, the remaining electricity and heat may still cause electric shocks and body burns. Therefore, put on protective gloves and begin operating the SUN2000 five minutes after the power-off.

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

Step 5 Turn off the DC switch between the SUN2000 and PV strings. Step 6 (Optional) Turn off the battery switch between the SUN2000 and batteries.

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----End

Check Item

Check Method

Maintenance Interval

System cleanliness

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

Once every 6 to 12 months

System running status



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.

Once every six months

Electrical connection



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.

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

Grounding reliability

Check that ground cables are securely connected.

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

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 off the SUN2000 (see 8.1 System Power-Off for details).

Table 8-1 Maintenance checklist

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8.3 Troubleshooting

Alarm ID

Alarm Name

Alarm Severity

Possible Causes

Troubleshooting

2001

High String Input Voltage

Major

The PV array is not properly configured. 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.

Check the serial connection configuration 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 configuration is corrected, the alarm disappears.

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 whether the string cables arc or are in poor contact.

2011

String Reversed

Major

The PV string is reversely connected.

Cause ID = 1, 2



1: PV1 is reversely connected.



2: PV2 is reversely connected.

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

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

Alarm severities are defined as follows:



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

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Alarm ID

Alarm Name

Alarm Severity

Possible Causes

Troubleshooting

2021

AFCI Check Failure

Major

The AFCI check fails. Cause ID = 1, 2



1: The AFCI check circuit is abnormal.



2: The AFCI circuit is faulty.

Turn off 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.

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.

1. Check the AC voltage.

2. Check whether the AC circuit

is disconnected or the AC circuit breaker is OFF.

2033

Grid Undervol tage

Major

Cause ID = 1 The grid voltage is below

the lower threshold or the low voltage duration has lasted for more than the value specified by low voltage ride-through (LVRT).

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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Alarm ID

Alarm Name

Alarm Severity

Possible Causes

Troubleshooting

2034

Grid Overvolt age

Major

Cause ID = 1 The grid voltage exceeds

the higher threshold or the high voltage has lasted for more than the value specified by high voltage ride-through (HVRT).

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 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 be rectified for a long time, contact the power operator.

2036

Grid Overfreq uency

Major

Cause ID = 1 Power grid exception: The

actual power grid frequency is higher 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 overfrequency protection threshold through the mobile app, SmartLogger, or NMS with the consent of the local power operator.

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Alarm ID

Alarm Name

Alarm Severity

Possible Causes

Troubleshooting

2037

Grid Underfre quency

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.

2038

Unstable Grid Frequenc y

Major

Cause ID = 1 Power grid exception: The

actual grid frequency change rate does not comply with the local power grid standard.

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.

2039

Output Overcurr ent

Major

Cause ID = 1 The power grid voltage

drops dramatically or the power grid is short-circuited. As a result, the SUN2000 transient output current exceeds the upper threshold and therefore the SUN2000 protection is triggered.

1. The SUN2000 detects its

external working conditions in real time. After the fault is rectified, the SUN2000 automatically recovers.

2. If the alarm occurs frequently

and affects 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.

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

8 System Maintenance

Issue 03 (2020-07-20)

Ltd.

92

Alarm ID

Alarm Name

Alarm Severity

Possible Causes

Troubleshooting

2040

Output DC Compon ent Overhigh

Major

Cause ID = 1 The DC component of the

SUN2000 output current exceeds the specified upper threshold.

1. The SUN2000 detects its

external working conditions in real time. After the fault is rectified, the SUN2000 automatically recovers.

2. If the alarm occurs frequently,

contact your dealer or Huawei technical support.

2051

Abnorm al Residual Current

Major

Cause ID = 1 The insulation impedance

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

1. If the alarm occurs

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

2. If the alarm occurs frequently

or persists, check whether the impedance between the PV string and the ground is too low.

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

Specifications and Main Features

Frequently Asked Questions

User Manual

About This Document

Contents

1 Safety Information

1.1 General Safety

1.2 Personnel Requirements

1.3 Electrical Safety

1.4 Installation Environment Requirements

1.5 Mechanical Safety

1.6 Commissioning

1.7 Maintenance and Replacement

2 Product Introduction

2.1 Overview

2.2 Component Description

2.3 Label Description

2.4 Working Principles

3 SUN2000 Storage

4 System Installation

4.1 Checking Before the Installation

4.2 Preparing Tools and Instruments

4.3 Determining the Installation Position

4.4 Moving a SUN2000

4.5 Installing a SUN2000

4.5.1 Wall-Mounted Installation

4.5.2 Support-Mounted Installation

5 Electrical Connection

5.1 Preparing Cables

5.2 Connecting PE Cables

5.3 (Optional) Installing a Smart Dongle

5.4 Installing a WLAN Antenna

5.5 Connecting an AC Output Power Cable

5.6 Connecting DC Input Power Cables

5.7 (Optional) Connecting Battery Cables

5.8 (Optional) Connecting Signal Cables

6 System Commissioning

6.1 Verification Before Power-On

6.2 System Power-On

7 Man-Machine Interaction

7.1 App Commissioning

7.1.1 Downloading the FusionSolar App

7.1.2 (Optional) Registering an Installer Account

7.1.3 Creating a PV Plant and a User

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

7.2 Parameters Settings

7.2.1 Energy Control

7.2.1.1 Grid-tied Point Control

7.2.1.2 Battery Control

7.2.2 AFCI

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

7.2.4 DRM (Australia AS4777)

8 System Maintenance

8.1 System Power-Off

8.2 Routine Maintenance

8.3 Troubleshooting