SUN600-(5KTL, 6KTL)-L0 User Manual

User Manual

SUN600-(5KTL, 6KTL)-L0 User Manual

10 mars 2022 — User Manual. Issue. 02. Date. 2022-03-10. HUAWEI TECHNOLOGIES CO., LTD. ... and observe all the safety instructions on the equipment and in this document.

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SUN600-5 6KTL-L0-UserManual

SUN600-(5KTL, 6KTL)-L0
User Manual

Issue Date

02 2022-03-10

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2022. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address:

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

Website:

https://e.huawei.com

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About This Document

Purpose
This document describes the Smart Solar Inverter-(2KTL-6KTL)-L0 (inverter for short) in terms of its installation, electrical connection, commissioning, maintenance, and troubleshooting. Before installing and operating the inverter, 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.

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.

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Symbol

About This Document
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 02 (2022-03-10)
Updated 5.7 (Optional) Connecting Signal Cables. Updated 10.1 Inverter Technical Specifications. Updated A Grid Code. Updated C Setting Power Adjustment Parameters.
Issue 01 (2021-11-01)
This issue is the first official release.

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iii

SUN600-(5KTL, 6KTL)-L0 User Manual

Contents

About This Document................................................................................................................ ii
1 Safety Information.................................................................................................................. 1
1.1 General Safety.......................................................................................................................................................................... 1 1.2 Personnel Requirements....................................................................................................................................................... 2 1.3 Electrical Safety........................................................................................................................................................................ 3 1.4 Installation Environment Requirements.......................................................................................................................... 4 1.5 Mechanical Safety................................................................................................................................................................... 4 1.6 Commissioning......................................................................................................................................................................... 5 1.7 Maintenance and Replacement..........................................................................................................................................6
2 Product Introduction...............................................................................................................7
2.1 Overview.................................................................................................................................................................................... 7 2.2 Component Description...................................................................................................................................................... 10 2.3 Label Description.................................................................................................................................................................. 11 2.3.1 Enclosure Labels.................................................................................................................................................................11 2.3.2 Product Nameplate........................................................................................................................................................... 13 2.4 Working Principles................................................................................................................................................................ 13
3 Inverter Storage..................................................................................................................... 16
4 System Installation............................................................................................................... 17
4.1 Checking Before the Installation..................................................................................................................................... 17 4.2 Preparing Tools and Instruments.................................................................................................................................... 18 4.3 Determining the Installation Position............................................................................................................................ 19 4.4 Moving an Inverter............................................................................................................................................................... 22 4.5 Installing a Inverter.............................................................................................................................................................. 23 4.5.1 Wall-Mounted Installation............................................................................................................................................. 24 4.5.2 Support-Mounted Installation.......................................................................................................................................26
5 Electrical Connection............................................................................................................29
5.1 Preparing Cables................................................................................................................................................................... 30 5.2 Connecting PE Cables.......................................................................................................................................................... 33 5.3 (Optional) Installing a Smart Dongle............................................................................................................................ 35 5.4 Installing a WLAN Antenna............................................................................................................................................... 36 5.5 Connecting an AC Output Power Cable........................................................................................................................ 37

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Contents

5.6 Connecting DC Input Power Cables................................................................................................................................40 5.7 (Optional) Connecting Signal Cables.............................................................................................................................44
6 System Commissioning........................................................................................................ 51
6.1 Verification Before Power-On........................................................................................................................................... 51 6.2 System Power-On................................................................................................................................................................. 52
7 Man-Machine Interaction....................................................................................................55
7.1 App Commissioning............................................................................................................................................................. 55 7.1.1 Downloading the FusionSolar App.............................................................................................................................. 55 7.1.2 (Optional) Registering an Installer Account............................................................................................................ 56 7.1.3 Creating a PV Plant and a User.................................................................................................................................... 57 7.2 Parameters Settings............................................................................................................................................................. 57 7.2.1 Energy Control.................................................................................................................................................................... 57 7.2.1.1 Grid-tied Point Control................................................................................................................................................. 57 7.2.2 AFCI........................................................................................................................................................................................ 61 7.2.3 IPS Check (for Italy CEI0-21 Grid Code Only)......................................................................................................... 63 7.2.4 DRM (Australia AS4777)................................................................................................................................................. 65
8 System Maintenance............................................................................................................ 67
8.1 System Power-Off................................................................................................................................................................. 67 8.2 Routine Maintenance.......................................................................................................................................................... 68 8.3 Troubleshooting..................................................................................................................................................................... 68
9 Inverter Disposal....................................................................................................................80
9.1 Removing a Inverter.............................................................................................................................................................80 9.2 Packing a Inverter................................................................................................................................................................. 80 9.3 Disposing a Inverter............................................................................................................................................................. 80
10 Technical Parameters......................................................................................................... 81
10.1 Inverter Technical Specifications................................................................................................................................... 81
A Grid Code................................................................................................................................ 86
B Device Commissioning......................................................................................................... 90
C Setting Power Adjustment Parameters........................................................................... 93
D Resetting Password.............................................................................................................. 95
E Rapid Shutdown.................................................................................................................... 98
F Locating Insulation Resistance Faults.............................................................................. 99
G DRM Configuration Guide for Standard As NZS4777.2............................................. 102
H Acronyms and Abbreviations...........................................................................................103

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1 Safety Information

1.1 General Safety

Statement

Before installing, operating, and maintaining the equipment, read this document and observe all the safety instructions on the equipment and in this document.
The "NOTICE", "CAUTION", "WARNING", and "DANGER" statements in this document do not cover all the safety instructions. They are only supplements to the safety instructions. 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.
Will not be liable for any consequences of the following circumstances:
Operation beyond the conditions specified in this document
Installation or use in environments which are not specified in relevant international or national standards
Unauthorized modifications to the product or software code or removal of the product
Failure to follow the operation instructions and safety precautions on the product and in this document
Equipment damage due to force majeure, such as earthquakes, fire, and storms
Damage caused during transportation by the customer
Storage conditions that do not meet the requirements specified in this document

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General Requirements

1 Safety Information

DANGER
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 to the specified torque using tools when installing the
equipment. Understand the components and functioning of a grid-tied PV power system
and relevant local standards. Repaint any paint scratches caused during equipment transportation or
installation in a timely manner. Equipment with scratches cannot be exposed to an outdoor environment for a long period of time. Do not open the host panel of the equipment.
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 equipment must receive thorough training, understand all necessary safety precautions, and be able to correctly perform all operations.
Only qualified professionals or trained personnel are allowed to install, operate, and maintain the equipment.
Only qualified professionals are allowed to remove safety facilities and inspect the equipment.
Personnel who will operate the equipment, including operators, trained personnel, and professionals, should possess the local national required qualifications in special operations such as high-voltage operations, working at heights, and operations of special equipment.

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

DANGER
Before connecting cables, ensure that the equipment is intact. Otherwise, electric shocks or fire may occur.
Ensure that all electrical connections comply with local electrical standards. Obtain approval from the local electric utility company before using the
equipment in grid-tied mode. Ensure that the cables you prepared meet local regulations. Use dedicated insulated tools when performing high-voltage operations.
AC and DC Power

DANGER
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.

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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.
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.

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When climbing a ladder, take the following precautions to reduce risks and ensure safety: Keep your body steady. Do not climb higher than the fourth rung of the ladder from the top. Ensure that your body's center of gravity does not shift outside the legs of the ladder.
Drilling Holes
When drilling holes into a wall or floor, observe the following safety precautions:
Wear goggles and protective gloves when drilling holes. When drilling holes, protect the equipment from shavings. After drilling, clean
up any shavings that have accumulated inside or outside the equipment.
Moving Heavy Objects
Be cautious to avoid injury when moving heavy objects.

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

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

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1.7 Maintenance and Replacement
DANGER
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 Product Introduction

2.1 Overview

Function Model

The Smart Solar Inverter-(2KTL-6KTL)-L0 is a single-phase grid-tied string inverter that converts the DC power generated by PV strings into AC power and feeds the electricity into the power grid.
This document involves the following product models: Smart Solar Inverter-2KTL-L0 Smart Solar Inverter-3KTL-L0 Smart Solar Inverter-3.68KTL-L0 Smart Solar Inverter-4KTL-L0 Smart Solar Inverter-4.6KTL-L0 Smart Solar Inverter-5KTL-L0 Smart Solar Inverter-6KTL-L0

Figure 2-1 Model identifier (using Smart Solar Inverter-5KTL-L0 as an example)

Table 2-1 Identifier description

No.

Meaning

Product family

name

Value Inverter: grid-tied solar inverter

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No. 2
3 4

Meaning Power level
Topology Design code

2 Product Introduction
Value 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. TL: transformerless L0: residential

Networking Application
The inverter 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 inverter scenario (dashed boxes indicate optional configuration)

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

NOTE

indicates the power flow direction,

indicates the wireless communication.

indicates the signal line, and

In the inverter cascading scenario, the master and slave solar inverters are both Smart Solar Inverter-(2KTL-6KTL)-L0, and a maximum of three inverters can be cascaded.

In the inverter cascading scenario, only one smart power sensor (G in the figure) can be connected to the master inverter.

In the inverter cascading scenario, the inverters connected to the power grid must meet the local power grid requirements.

Smart PV Inverter-(2KTL-6KTL)-L0 cannot connect to the SmartLogger, energy storage systems, or optimizers.

Smart PV Inverter-(2KTL-6KTL)-L0 does not support the off-grid mode.

(A) PV string

(B) DC switch

(D) AC switch

(E) Residential PDU

(F) Smart Power Sensor

(G) Residential power meter

(H) Power grid

(I) Household load

(J) FusionSolar app (K) 4G Smart Dongle

(L) WLAN-FE Smart Dongle

(M) Router

(N) FusionSolar Smart PV Management System

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2 Product Introduction

Supported Power Grid Types
The inverter 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

2.2 Component Description
Appearance
Figure 2-5 Appearance

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(1) LED indicators (3) Hanging kit (5) Heat sink (7) DC switch locking screw holea (9) DC input terminals (PV1+/PV1) (11) Reserved (13) Antenna port (ANT) (15) AC output port (AC)

(2) Front panel (4) Mounting bracket (6) Ventilation valve (8) DC switchb (DC SWITCH) (10) DC input terminals (PV2+/PV2) (12) Smart Dongle port (4G/FE) (14) Communications port (COM) (16) Ground point

NOTE Note a: The DC switch locking screw is used to lock the DC switch to prevent accidental
startup. It is delivered with the inverter. Note b: DC input terminals PV1 and PV2 are controlled by the DC switch.
2.3 Label Description

2.3.1 Enclosure Labels
Symbol

Name Delay discharge
Burn warning

Description
Residual voltage exists after the inverter is powered off. It takes 5 minutes for the inverter to discharge to the safe voltage.
Do not touch a running inverter because it generates high temperatures on the shell.

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Symbol

2 Product Introduction

Name Electric shock warning
Refer to documentation

Description
High voltage exists after the inverter is powered on. Only qualified and trained electrical technicians are allowed to perform operations on the inverter.
High touch current exists after the inverter is powered on. Before powering on the inverter, ensure that the inverter is properly grounded.
Reminds operators to refer to the documents delivered with the inverter.

Grounding label

Indicates the position for connecting the PE cable.

Operation warning Grounding warning

Do not remove the DC input connector or AC output connector when the inverter is running.
Ground the nverter before powering it on.

Inverter serial number Indicates the serial number.

Inverter MAC address Indicates the MAC address.

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Symbol

2 Product Introduction

Name

Description

Inverter Wi-Fi login QR Scan the QR code to

code

connect to the Huawei

inverter Wi-Fi network.

2.3.2 Product Nameplate
Figure 2-6 Nameplate (using Smart Solar Inverter-5KTL-L0 as an example)

(1) Trademark and product model (3) Certification marks

(2) Key technical parameters
(4) Company name and country of origin

NOTE The nameplate figure is for reference only.

2.4 Working Principles

Schematic Diagram
The inverter receives inputs from up to two PV strings. Then the inputs are grouped into two MPPT routes inside the inverter to track the maximum power

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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.

Figure 2-7 Schematic diagram

Working Mode
Figure 2-8 Working modes

Table 2-2 Working mode description

Working Description mode

Standby mode

The inverter enters Standby mode when the external environment does not meet the requirements for starting the inverter. In Standby mode:
The inverter continuously detects its operation status. Once the operating conditions are met, the inverter enters Operating mode.
If the inverter detects a shutdown command or a fault after startup, it enters Shutdown mode.

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Working mode Operating mode
Shutdown mode

Description
In Operating mode: The inverter converts DC power from PV strings into AC power
and feeds the power to the power grid. The inverter tracks the maximum power point to maximize the
PV string output power. If the inverter detects a shutdown command or a fault, it enters
Shutdown mode. If the inverter detects that the output power of PV strings does
not meet the requirements for grid-tied power generation, it enters Standby mode.
In Standby or Operating mode, if the inverter detects a shutdown command or a fault, it enters Shutdown mode.
In Shutdown mode, if the inverter detects that the fault is rectified or the startup command is executed, the inverter enters Standby mode.

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3 Inverter Storage

3 Inverter Storage
The following requirements should be met if the inverter is not put into use directly:
Do not unpack the inverter. 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 inverters can be stacked. To avoid personal injury or
device damage, stack inverters with caution to prevent them from falling over. During the storage period, check the inverter 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 inverter has been stored for more than two years, it must be checked and tested by professionals before being put into use.

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4 System Installation
4.1 Checking Before the Installation
Checking Outer Packing
Before unpacking the inverter, check the outer packing for damage, such as holes and cracks, and check the inverter model. If any damage is found or the inverter model is not what you requested, do not unpack the package and contact your dealer as soon as possible.
NOTICE You are advised to remove the packing materials within 24 hours before installing the inverter.
Checking Deliverables
After unpacking the inverter, check that the deliverables are intact and complete. If any item is missing or damaged, contact your dealer.
NOTE For details about the number of accessories delivered with the inverter, see the Packing List in the packing case.

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4.2 Preparing Tools and Instruments

Type Installation

Tools and Instruments

4 System Installation

Hammer drill (with a Torque socket wrench Torque wrench drill bit of 8 mm)

Diagonal pliers

Wire strippers

Torque screwdriver

Rubber mallet

Utility knife

Cable cutter

Crimping tool (model: PVCZM-22100/19100)

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)

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Type

Tools and Instruments

4 System Installation

Marker

Steel measuring tape Level

Personal protective equipment (PPE)

Hydraulic pliers

Heat-shrink tubing

Heat gun

Safety gloves

Safety goggles -

Dust mask -

Safety boots

4.3 Determining the Installation Position

Basic Requirements
The inverter is protected to IP65 and can be installed indoors or outdoors.
Do not install the inverter 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 inverter near flammable or explosive materials.
Do not install the inverter at a place within children's reach.
The inverter will be corroded in salt areas, and the salt corrosion may cause fire. Do not install the inverter outdoors in salt areas. A salt area refers to the region within 500 meters from the coast or prone to sea breeze. The regions prone to sea breeze vary with weather conditions (such as typhoons and monsoons) or terrains (such as dams and hills).

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Installation Environment Requirements
The inverter must be installed in a well-ventilated environment to ensure good heat dissipation.
When the inverter is installed under direct sunlight, the power may be derated due to the temperature rise.
You are advised to install the inverter in a sheltered place or install an awning over it.
Mounting Structure Requirements
The mounting structure where the inverter is installed must be fire resistant. Do not install the inverter on flammable building materials. Ensure that the installation surface is solid enough to bear the weight of the
inverter. In residential areas, do not install the inverter on plaster board walls or walls
made of similar materials with a weak sound insulation performance because the noise generated by the inverter may interfere with residents.
Installation Angle Requirements
The inverter can be wall-mounted or pole-mounted. The installation angle requirements are as follows:
Install the inverter vertically or at a maximum back tilt of 15 degrees to facilitate heat dissipation.
Do not install the inverter at forward tilted, excessive back tilted, side tilted, horizontal, or upside down positions.
Figure 4-1 Installation angle

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Installation Space Requirements
Reserve enough clearance around the inverter to ensure sufficient space for installation and heat dissipation.

Figure 4-2 Installation space

When installing multiple inverters, install them in horizontal mode if sufficient space is available and install them in triangle mode if no sufficient space is available. Stacked installation is not recommended.
Figure 4-3 Horizontal installation mode (recommended)

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Figure 4-4 Triangle installation mode (recommended)

4 System Installation

Figure 4-5 Stacked installation mode (not recommended)

NOTE
The installation figures are for reference only and are irrelevant to the inverter cascading scenario.

4.4 Moving an Inverter

Procedure
Step 1 Hold the handles on both sides of the inverter, lift the inverter from the packing case, and transport it to the installation position.

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

Figure 4-6 Moving a inverter

----End
4.5 Installing a Inverter
Installation Precautions
Figure 4-7 shows the dimensions of mounting holes for the inverter. Figure 4-7 Mounting bracket dimensions

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4.5.1 Wall-Mounted Installation

Procedure
Step 1 Determine the positions for drilling holes using the marking-off template. Level the positions of mounting holes using a level, and mark the positions with a marker.
Step 2 Secure the mounting bracket.

DANGER When drilling holes, avoid the water pipes and power cables buried in the wall.
NOTE M6x60 expansion bolts are delivered with the inverter. 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

(1) Bolt (4) Flat washer

(2) Nut (5) Expansion sleeve

(3) Spring washer

NOTICE
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.

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Figure 4-9 Installing expansion bolts

4 System Installation

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 inverter on the mounting bracket. Step 5 Tighten the nuts.
Figure 4-11 Tightening nuts

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

NOTICE
Prepare an anti-theft lock suitable for the lock hole diameter (10 mm). An outdoor waterproof lock is recommended. Keep the key to the anti-theft lock.

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Figure 4-12 Installing an anti-theft lock

4 System Installation

----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.
Figure 4-13 Determining hole positions

Step 2 Drill holes using a hammer drill. NOTE
You are advised to apply anti-rust paint on the hole positions for protection.

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Figure 4-14 Drilling holes

4 System Installation

Step 3 Secure the mounting bracket. Figure 4-15 Secure the mounting bracket

NOTE Prepare bolt assemblies based on the hole diameter of the mounting bracket. Step 4 (Optional) Install the locking screw for the DC switch.

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

4 System Installation

Step 5 Install the inverter on the mounting bracket. Step 6 Tighten the bolt assemblies.
Figure 4-17 Tightening bolt assemblies

Step 7 (Optional) Install an anti-theft lock.
NOTICE Prepare an anti-theft lock suitable for the lock hole diameter (10 mm). An outdoor waterproof lock is recommended. Keep the key to the anti-theft lock.
Figure 4-18 Installing an anti-theft lock

----End

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5 Electrical Connection
Precautions
DANGER Before connecting cables, ensure that the DC switch on the inverter and all the switches connecting to the inverter are set to OFF position. Otherwise, the high voltage of the inverter may result in electric shocks.
WARNING 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.
NOTE 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-andyellow cables are only used for PE).

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5.1 Preparing Cables
Figure 5-1 Inverter cable connections (dashed boxes indicate optional configuration)

Table 5-1 Component description

No. Component

Description

Source

PV string

The inverter supports the input from two PV strings.

Prepared by the customer

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

Smart Donglea

Supported models:
WLAN-FE Smart Dongle: SDongleA-05
4G Smart Dongle: SDongleA-03

Purchased from manufacturer

Smart Power Sensor b The inverter can connect Purchased from

to the DDSU666-H and Manufacturer

DTSU666-H smart power

sensors.

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No. Component

Inverter

AC switch

5 Electrical Connection

Description

Source

The following third-party meters are also supported: GAVAZZIEM340-DIN AV2 3 X S1 X08, GAVAZZI-EM111DIN AV8 1 X S1 X08, GAVAZZI-EM112-DIN AV0 1 X S1 X08, CCSWNC-3Y-400-MB, CCSWNC-3D-240-MB, and Chint DDSU666.
The GAVAZZI three-phase meter has different power sampling methods. As a result, the power is incorrectly displayed on the NMS.

Prepared by the customer

Select a proper model as Purchased from

required.

manufacturer

Recommended: a singlephase AC circuit breaker with a rated voltage greater than or equal to 250 V AC and a rated current of:
16 A (Smart Solar Inverter-2KTL-L0)
25 A (Smart Solar Inverter-3KTL-L0 and Smart Solar Inverter-3.68KTL-L0)
32 A (Smart Solar Inverter-4KTL-L0, Smart Solar Inverter-4.6KTL-L0, Smart Solar Inverter-5KTL-L0, and Smart Solar inverter-6KTL-L0)

Prepared by the customer

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Table 5-2 Cable description

No. Cable

Type

Recommended Specifications

Source

1 DC input power cable

Common outdoor PV cable in the industry

Conductor crosssectional area: 46 mm2
Cable outer diameter: 5.59 mm

Prepared by the customer

2 (Optional) Outdoor shielded

Signal

twisted pair cable

cable

Conductor crosssectional area:
Combined crimping of cables on the port: 0.200.35 mm2
Crimping the cables on the port without combining them: 0.201 mm2
Cable outer diameter:
4-hole rubber plug: 48 mm
2-hole rubber plug: 811 mm

Prepared by the customer

3 AC output Not using the PE Conductor cross- Prepared

power

equipotential point

sectional area: 46 by the

cablea

at the AC output

mm2

customer

port: two-core (L and N) outdoor copper cable

Cable outer diameter: 1021 mm

Using the PE

equipotential point

at the AC output

port: three-core (L,

N, and PE) outdoor

copper cable

4 PE cable

Single-core outdoor copper cable and M6 OT terminal

410 mm2

Prepared by the customer

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

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

DANGER
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.

NOTE
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 inverter provides the grounding detection function. This function is used to check whether the inverter is properly grounded before the inverter starts, or check whether the ground cable is disconnected when the inverter is running. This function is only available under limited conditions. To ensure the safe operation of the inverter, properly ground the inverter according to the connection requirements of the ground cable. For some power grid types, if the output side of the inverter is connected to an isolation transformer, ensure that the inverter is properly grounded and set Grounding inspection to Disable to enable the inverter to run properly. If you are not sure whether the inverter is connected to such a type of power grid, contact your dealer.
According to IEC 62109, to ensure the safe operation of the inverter in the case of ground cable damage or disconnection, properly connect the ground cable of the inverter and ensure that it meets at least one of the following requirements before the grounding detection function becomes invalid:
If the PE terminal is not connected to the AC connector, use a single-core outdoor copper cable with a conductor cross-sectional area of at least 10 mm2 as the PE cable on the chassis.
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.
In some countries and regions, the inverter must have additional ground cables. Use cables with the same diameter as the AC output power cable and

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

Procedure
Step 1 Crimp an OT terminal.

NOTICE
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

(A) Core wire (D) Hydraulic pliers

(B) Insulation layer (E) Heat gun

Step 2 Connect the PE cable.

NOTICE
Ensure that the PE cable is connected securely. You are advised to use the right ground point and reserve the other ground
point for future use.

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Figure 5-3 Connecting a PE cable

5 Electrical Connection

----End

5.3 (Optional) Installing a Smart Dongle

Procedure

NOTE
You are advised to install the Smart Dongle before installing the WLAN antenna. When installing the SIM card, determine its installation direction based on the silk
screen and arrow on the card slot. Press the SIM card in place to lock it, indicating that the SIM card is correctly installed. When removing the SIM card, push it inwards to eject it. When reinstalling the cover of the Smart Dongle, ensure that the buckles spring back in
place with a click sound.
4G Smart Dongle (4G Communication)

Figure 5-4 Installing a 4G Smart Dongle

WLAN-FE Smart Dongle (FE Communication)

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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)

5.4 Installing a WLAN Antenna
Procedure
Step 1 Remove the watertight cap from the ANT port. Step 2 Install the washer to the ANT port on the chassis. Step 3 Install the WLAN antenna.
NOTICE 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 inverter to ensure that the inverter can be safely disconnected from the power grid.

WARNING
Do not connect loads between the inverter and the AC switch.
The inverter is integrated with a comprehensive residual current monitoring unit. Once detecting that the residual current exceeds the threshold, the inverter immediately disconnects itself from the power grid.
NOTICE If the external AC switch can perform earth leakage protection, the rated
leakage action current should be greater than or equal to 100 mA. If multiple inverters connect to the general residual current device (RCD)
through their respective external AC switches, the rated leakage action current of the general RCD should be greater than or equal to the number of inverters multiplied by 100 mA. A knife switch cannot be used as an AC switch.
Procedure
Step 1 Connect the AC output power cable to the AC connector.

NOTICE
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 inverter
malfunction or damage to its AC connector. Ensure that the cable is not twisted.

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

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

NOTE
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.

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Figure 5-9 Length for cable stripping

5 Electrical Connection

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

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Figure 5-11 Cabling requirements

5 Electrical Connection

----End
Follow-up Procedure
WARNING Before removing the AC connector, ensure that the DC switch at the bottom of the inverter and all the switches connected to the inverter are OFF.
To remove the AC connector from the inverter, perform the operations in reverse order. Figure 5-12 Removing a plug insert

5.6 Connecting DC Input Power Cables
Precautions

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DANGER
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 inverter is OFF. Failing to do so may result in electric shocks.
When the inverter 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 inverter, do not remove the watertight cap from the DC input terminals. Otherwise, the IP rating of the inverter will be affected.

WARNING
Ensure that the following conditions are met. Otherwise, the inverter may be damaged, or even a fire could happen.
The DC input voltage of the inverter 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 inverter.
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.

NOTICE
Since the output of the PV string connected to the inverter cannot be grounded, ensure that the PV module output is well insulated to ground.
During the installation of PV strings and the inverter, the positive or negative terminals of PV strings may be short-circuited to ground if the power cable is not properly installed or routed. In this case, an AC or DC short circuit may occur and damage the inverter. The caused device damage is not covered under any warranty or service agreement.
Figure 5-13 DC input terminals

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(1) Terminals of DC input 1
Procedure
Step 1 Assemble a DC connector.

5 Electrical Connection (2) Terminals of DC input 2

CAUTION
Use the Staubli MC4 positive and negative metal terminals and DC connectors delivered with the inverter. 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.

NOTICE
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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NOTE
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.

WARNING 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 inverter.

NOTICE 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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NOTICE
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

WARNING Before removing the positive and negative connectors, ensure that the DC switch is OFF.
To remove the positive and negative connectors from the inverter, 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 Signal Cables
Context
NOTICE When laying out signal cables, separate them from power cables and keep them away from strong interference sources to prevent communication interruption.

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Figure 5-17 Signal cable ports

5 Electrical Connection

Table 5-3 COM port definition

No. Label Definition

Single Inverter Scenario

Inverter Cascading Scenario

485B1 RS485B, RS485 N/A

differential

signal

Used for connecting to the solar inverters.

485A1 RS485A, RS485

differential

signal+

485B2 RS485B, RS485 Connects to the

Connects to the RS485

differential

RS485 signal port signal port on the

signal

on the power

power collector.

collector.

485A2 RS485A, RS485

differential

signal+

GND GND of the

DI1/DI2

Used for connecting to GND of the DI1/DI2.

N/A

DI1

Digital input signal 1+

Used for connecting to the DI1 positive signal. It can be used for connecting to the DRM0 scheduling signal port.

DI2

Digital input signal 2+

Reserved port

Communication Networking Mode
NOTE
The smart power sensor and Smart Dongle must be connected to the same inverter.
Single inverter scenarios

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Figure 5-18 Single inverter

5 Electrical Connection

Figure 5-19 Connecting cables to the smart power sensor (single inverter)

Inverter cascading scenarios In-phase grid connection
Figure 5-20 In-phase grid connection

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Figure 5-21 Connecting cables to the smart power sensor (in-phase grid connection)

Balanced three-phase grid connection Figure 5-22 Balanced three-phase grid connection

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Figure 5-23 Connecting cables to the smart power sensor (balanced three-phase grid connection)

NOTE
In cascading scenarios, the inverters are required to connect to the management system through a Smart Dongle.
In the preceding networking, the inverters are cascaded and support the grid-tied point control function to achieve zero export.
If the inverters 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 inverters 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.
For Australia and New Zealand markets, Inverters should not be installed in multiple phase combinations.
Procedure
Step 1 Connect signal cables to corresponding signal connectors.

NOTICE
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.

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Figure 5-24 Crimping two signal cables

5 Electrical Connection

Figure 5-25 Assembling a signal connector (inverter cascading)

Step 2 Connect the signal connector to the corresponding port.
NOTICE Ensure that the signal connector is connected securely.

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Figure 5-26 Securing a signal connector

5 Electrical Connection

----End

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6 System Commissioning

6.1 Verification Before Power-On

Table 6-1 Check items and acceptance criteria

No.

Check Item

Acceptance Criteria

Inverter

The inverter is installed correctly and securely.

WLAN antenna

The WLAN antenna is installed correctly and securely.

Cables routing

Cables are routed properly as required by the customer.

Cable tie

Cable ties are evenly distributed and no burr exists.

Grounding

The PE cable is connected correctly, securely, and reliably.

Switch

The DC switch and all the switches connecting to the inverter are OFF.

Cable connection

The AC output power cable, DC input power cable, and signal cable are connected correctly, securely, and reliably.

Unused terminal and port Unused terminals and ports are locked

by watertight caps.

Installation environment

The installation space is proper, and

the installation environment is clean

and tidy.

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6.2 System Power-On
Prerequisites
Before turning on the AC switch between the inverter and the power grid, use a multimeter to check that the AC voltage is within the allowed range.

NOTICE If the DC power supply is connected but the AC power supply is disconnected, the inverter will report a Grid Loss alarm. The inverter can start properly only after the power grid recovers.
Procedure
Step 1 Turn on the AC switch between the inverter and the power grid. Step 2 (Optional) Remove the locking screw from the DC switch.
Figure 6-1 Removing the locking screw from a DC switch

Step 3 Turn on the DC switch between the PV string and the inverter if there is any. Step 4 Turn on the DC switch at the bottom of the inverter. Step 5 Observe the LEDs to check the inverter operating status.

Table 6-2 LED indicators 1

Category

Status Steady red

Steady red

----End

6 System Commissioning
Description The inverter hardware is faulty. The inverter needs to be replaced.

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7 Man-Machine Interaction
7.1 App Commissioning
7.1.1 Downloading the FusionSolar App
Method 1: Access https://solar.huawei.com using the mobile phone browser and download the latest installation package.
Figure 7-1 Download Mode

Method 2: Search for FusionSolar on Huawei AppGallery and download the latest installation package.
Method 3: Scan the following QR code and download the latest installation package.
Figure 7-2 QR code

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7.1.2 (Optional) Registering an Installer Account
NOTE
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 7-3 Creating the first installer account

NOTICE To create multiple installer accounts for a company, log in to the FusionSolar app and tap New User to create an installer account.
Figure 7-4 Creating multiple installer accounts for the same company

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7.1.3 Creating a PV Plant and a User
Figure 7-5 Creating a PV plant and a user

7 Man-Machine Interaction

7.2 Parameters Settings
Go to the Device Commissioning screen and set inverter parameters. For details about entering the Device Commissioning screen, see B Device Commissioning.
7.2.1 Energy Control
On the home screen, tap Power adjustment to perform the corresponding operation.
Figure 7-6 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.

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Figure 7-7 Grid-tied point control

7 Man-Machine Interaction

Table 7-1 Grid-tied point control

Parameter Name

Active

Unlimited

power

Grid connection with zero power

Closed-loop controller

Limitation mode
Power adjustment period Power control hysteresis

Active power output limit for fail-safe

Description
If this parameter is set to Unlimited, the output power of the inverter is not limited and the inverter can connect to the power grid at the rated power.
If multiple inverters are cascaded, set this parameter to SDongle.
If there is only one inverter, set this parameter to Inverter.
Total power indicates export limitation of the total power at the grid-tied point.
Specifies the shortest interval for a single anti-backfeeding adjustment.
Specifies the dead zone for adjusting the inverter output power. If the power fluctuation is within the power control hysteresis, the power is not adjusted.
Specifies the derating value of the inverter active power by percentage. If the Smart Dongle does not detect any meter data or the communication between the Smart Dongle and the inverter is disconnected, the Smart Dongle delivers the derating value of the inverter active power by percentage.

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Parameter Name

Communication disconnection fail-safe

Communication disconnection detection time

Grid connection

Closed-loop controller

with limited power

(kW)

Description
In the inverter anti-backfeeding scenario, if this parameter is set to Enable, the inverter will derate according to the active power derating percentage when the communication between the inverter and the Smart Dongle is disconnected for a period longer than Communication disconnection detection time.
Specifies the time for determining the communication disconnection between the inverter and the Dongle.
This parameter is displayed when Communication disconnection failsafe is set to Enable.
If multiple Smart Solar Inverters are cascaded, set this parameter to SDongle.
If there is only one Smart Solar Inverter, set this parameter to Inverter.

Limitation mode
Maximum grid feed-in power
Power adjustment period Power control hysteresis
Active power output limit for fail-safe

Total power indicates export limitation of the total power at the grid-tied point.
Specifies the maximum active power transmitted from the grid-tied point to the power grid.
Specifies the shortest interval for a single anti-backfeeding adjustment.
Specifies the dead zone for adjusting the inverter output power. If the power fluctuation is within the power control hysteresis, the power is not adjusted.
Specifies the derating value of the inverter active power by percentage. If the Smart Dongle does not detect any meter data or the communication between the Smart Dongle and the inverter is disconnected, the Smart Dongle delivers the derating value of the inverter active power by percentage.

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Parameter Name

Communication disconnection fail-safe

Communication disconnection detection time

Grid connection

Closed-loop controller

with limited power

(%)

Description
In the inverter anti-backfeeding scenario, if this parameter is set to Enable, the inverter will derate according to the active power derating percentage when the communication between the inverter and the Smart Dongle is disconnected for a period longer than Communication disconnection detection time.
Specifies the time for determining the communication disconnection between the inverter and the Dongle.
This parameter is displayed when Communication disconnection failsafe is set to Enable.
If multiple inverters are cascaded, set this parameter to SDongle.
If there is only one inverter, set this parameter to Inverter.

Limitation mode
PV plant capacity
Maximum grid feed-in power
Power adjustment period Power control hysteresis

Total power indicates export limitation of the total power at the grid-tied point.
Specifies the total maximum active power in the inverter cascading scenario.
Specifies the percentage of the maximum active power of the gridtied point to the PV plant capacity.
Specifies the shortest interval for a single anti-backfeeding adjustment.
Specifies the dead zone for adjusting the inverter output power. If the power fluctuation is within the power control hysteresis, the power is not adjusted.

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Parameter Name

7 Man-Machine Interaction

Active power output limit for fail-safe
Communication disconnection fail-safe
Communication disconnection detection time

Description
Specifies the derating value of the inverter active power by percentage. If the Smart Dongle does not detect any meter data or the communication between the Smart Dongle and the inverter is disconnected, the Smart Dongle delivers the derating value of the inverter active power by percentage.
In the inverter anti-backfeeding scenario, if this parameter is set to Enable, the inverter will derate according to the active power derating percentage when the communication between the inverter and the Smart Dongle is disconnected for a period longer than Communication disconnection detection time.
Specifies the time for determining the communication disconnection between the inverter and the Dongle.
This parameter is displayed when Communication disconnection failsafe is set to Enable.

----End
7.2.2 AFCI

Function

If PV modules or cables are not properly connected or damaged, electric arcs may occur, which may cause fire. Inverters provide unique arc detection in compliance with UL 1699B-2018 to ensure the safety of users' lives and property.
This function is disabled by default, to enable this function, log in to the FusionSolar app, enter the Device Commissioning screen, choose Settings > Feature parameters, and enable AFCI.

Clearing Alarms
The AFCI function involves the DC arc fault alarm.
The Inverter has the AFCI alarm automatic clearance mechanism. If an alarm is triggered for less than five times within 24 hours, the Inverter automatically clears the alarm. If the alarm is triggered for five times or more within 24 hours, the Inverter locks for protection. You need to manually clear the alarm on the Inverter so that it can work properly.

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You can manually clear the alarm as follows:
Method 1: FusionSolar App
Log in to the FusionSolar app and choose My > Device Commissioning. On the Device Commissioning screen, connect and log in to the Inverter that generates the AFCI alarm, tap Alarm management, and tap Clear on the right of the DC arc fault alarm to clear the alarm.

Figure 7-8 Alarm management

Method 2: FusionSolar Smart PV Management System Log in to the FusionSolar Smart PV Management System using a non-owner account, choose Management > Alarm Management, select the DC arc fault alarm, and click Clear to clear the alarm.
Figure 7-9 Clearing alarms
Switch to the owner account with PV plant management rights. On the home page, click the PV plant name to go to the PV plant page, and click OK as prompted to clear the alarm.

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Figure 7-10 Owner confirmation

7 Man-Machine Interaction

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 Inverter. During the selfcheck, the Inverter 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 Inverter 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 7-11 IPS test

7 Man-Machine Interaction

Table 7-2 IPS test type

IPS Test Type

Description

Maximum voltage The default maximum voltage over 10 min protection

over 10 min

threshold is 253 V (1.10 Vn), and the default protection

(59.S1)

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.

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.

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IPS Test Type
Minimum underfrequency (81.S2)

Description
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 7-12 Wiring diagram for the DRM function

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

Table 7-3 DRM requirements

Mode

Port on the inverter

DRM0

DI1 and GND of the COM port

Requirements
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.

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

Step 2 Set DRM to

Figure 7-13 DRM

----End

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8 System Maintenance

8 System Maintenance
8.1 System Power-Off
Precautions
WARNING After the inverter powers off, the remaining electricity and heat may still cause electric shocks and body burns. Therefore, put on protective gloves and begin operating the inverter five minutes after the power-off.
Procedure
Step 1 Send a shutdown command on the app. Step 2 Turn off the AC switch between the inverter and the power grid. Step 3 Turn off the DC switch at the bottom of the inverter. Step 4 (Optional) Install the locking screw for the DC switch.
Figure 8-1 Installing a locking screw for the DC switch

Step 5 Turn off the DC switch between the inverter and PV strings. ----End

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

CAUTION
Before cleaning the inverter, connecting cables, and maintaining the grounding reliability, power off the inverter (see 8.1 System Power-Off for details).

Table 8-1 Maintenance checklist

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 inverter is not damaged or deformed.
Check that the inverter operates with no abnormal sound.
Check that all inverter 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, 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.

8.3 Troubleshooting
Alarm severities are defined as follows:

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Major: The inverter enters the shutdown mode or functions abnormally after a fault occurs.
Minor: Some components are faulty but the inverter can still connect to the power grid and generate power.
Warning: The inverter functions normally, but its output power decreases due to external factors.

Table 8-2 Common alarms and troubleshooting measures

Alarm Alarm Name ID

Alarm

Possible Causes

Severity

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 inverter 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 inverter. 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 = PV1 and PV2
Cause ID 2 = PV3 and PV4

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

2003

DC Arc Fault

Major

The PV string power cables arc or are in poor contact.
Cause ID 1 = PV1
Cause ID 2 = PV2

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 inverter. If yes, wait until the PV string current decreases below 0.5 A, set DC switch to OFF, and adjust the PV string polarity.

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Alarm ID
2021

Alarm Name
AFCI Check Failure

2032 Grid Failure

2033

Grid Undervoltage

Alarm Severity Major
Major
Major

Possible Causes

Troubleshooting

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.

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.

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 inverter 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, 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
2034

Alarm Name
Grid Overvoltage

Alarm Severity
Major

Possible Causes

Troubleshooting

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 inverter 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, 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.

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Alarm ID 2036
2037

Alarm Name Grid Overfrequency
Grid Underfrequenc y

Alarm Severity Major
Major

Possible Causes

Troubleshooting

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 inverter 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, or NMS with the consent of the local power operator.

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 inverter 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, or NMS with the consent of the local power operator.

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Alarm ID
2038

Alarm Name
Unstable Grid Frequency

2039

Output Overcurrent

2040

Output DC Component Overhigh

Alarm Severity Major
Major
Major

Possible Causes

Troubleshooting

Cause ID = 1
Power grid exception: The actual grid frequency change rate does not comply with the local power grid standard.

Cause ID = 1
The power grid voltage drops dramatically or the power grid is shortcircuited. As a result, the inverter transient output current exceeds the upper threshold and therefore the inverter protection is triggered.

1. The inverter detects its external working conditions in real time. After the fault is rectified, the inverter 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.

Cause ID = 1
The DC component of the inverter output current exceeds the specified upper threshold.

1. The inverter detects its external working conditions in real time. After the fault is rectified, the inverter automatically recovers.
2. If the alarm occurs frequently, contact your dealer.

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Alarm ID
2051

Alarm Name
Abnormal Residual Current

Alarm Severity
Major

Possible Causes
Cause ID = 1 The insulation impedance of the input side to PE decreases when the inverter is operating.

Troubleshooting
1. If the alarm occurs occasionally, the external circuit may be abnormal temporarily. The inverter 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.

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Alarm ID
2062

Alarm Name
Low Insulation Resistance

Alarm Severity
Major

Possible Causes
Cause ID = 1 A short circuit occurs
between the PV array and the ground. The ambient air of the PV array is damp and the insulation between the PV array and the ground is poor.

Troubleshooting
1. Check the output impedance of the PV array to ground. If there is a short circuit or lack of insulation, rectify it.
2. Check that the PE cable of the inverter is correctly connected.
3. If the impedance is lower than the specified protection threshold in rainy and cloudy days, set Insulation resistance protection using the mobile app, or NMS. Current insulation resistance: x M, possible short circuit position: x%. The short circuit position is valid for a single PV string. If there are multiple PV strings, check the PV strings one by one. For details, see F Locating Insulation Resistance Faults.
For details about how to query the low insulation resistance alarm, see HUAWEI SUN2000-2-6KTL-L1 and SUN6000-5/6KTLL0 Inverter Low Insulation Resistance Fault Indication Guide.

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Alarm ID
2063

Alarm Name

Alarm Severity

Overtemperatu Minor re

Possible Causes
Cause ID = 1 The inverter is installed
in a place with poor ventilation. The ambient temperature is higher than the upper threshold. The inverter is not working properly.

Troubleshooting
Check the ventilation and ambient temperature of the inverter installation position.
If the ventilation is poor or the ambient temperature exceeds the upper threshold, improve the ventilation and heat dissipation.
If the ventilation and ambient temperature both meet requirements, contact your dealer.

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Alarm ID
2064

Alarm Name Device Fault

Alarm Severity
Major

Possible Causes

Troubleshooting

An unrecoverable fault has occurred on a circuit inside the inverter.
Cause ID = 112
1: The Boost input is short-circuited.
2: The Boost input experiences overcurrent.
3: The control circuit is faulty.
4: The inverter circuit is abnormal.
5: The residual current sensor is faulty.
6: The temperature detection fails.
7: EEPROM read/write fails.
8: The auxiliary power supply is abnormal.
9: The grid-tied relay is abnormal.
10: The DC bus experiences overvoltage.
11: The DC bus experiences undervoltage.
12: The DC bus experiences voltage imbalance.

Turn off the AC output switch and DC input switch, and then turn them on after 5 minutes. If the fault persists, contact your dealer.

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Alarm ID 2065
61440 2067
2070

Alarm Name
Upgrade Failed or Version Mismatch

Alarm Severity
Minor

Monitoring Unit Faulty

Minor

Faulty Power Collector

Major

Active Islanding Major

Possible Causes

Troubleshooting

The upgrade does not complete normally.
Cause ID = 14, 7
1. The software and hardware of the main controller do not match.
2: The main and auxiliary controller software versions do not match.
3: The monitoring and power controller software versions do not match.
4: The upgrade fails.

1. Perform an upgrade again.
2. If the upgrade fails for multiple times, contact your dealer.

Cause ID = 1
The flash memory is insufficient.
The flash memory has bad sectors.

Turn off the AC output switch and DC input switch, and then turn them on after 5 minutes. If the fault persists, replace the monitoring board or contact your dealer.

Cause ID = 1
The smart power sensor is disconnected.

1. Check that the configured power meter model is the same as the actual model.
2. Check that the communications parameters for the smart power sensors are the same as the inverter RS485 configurations.
3. Check whether the smart power sensor is powered on and whether the RS485 communications cable is connected.

Cause ID = 1
When the power grid experiences an AC power outage, the inverter detects islanding proactively.

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

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

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9 Inverter Disposal

9 Inverter Disposal
9.1 Removing a Inverter
Procedure
Step 1 Power off the inverter. For details, see 8.1 System Power-Off. Step 2 Disconnect all cables from the inverter, including signal cables, DC input power
cables, AC output power cables, and PE cables. Step 3 Remove the WLAN antenna or the Smart Dongle from the inverter. Step 4 Remove the inverter from the mounting bracket. Step 5 Remove the mounting bracket.
----End
9.2 Packing a Inverter
If the original packaging is available, put the inverter inside it and then seal it using adhesive tape.
If the original packaging is unavailable, put the inverter inside a suitable hard carton and seal it properly.
9.3 Disposing a Inverter
If the inverter service life expires, dispose the inverter according to the local disposal rules for electrical equipment and electronic component waste.

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10 Technical Parameters

10.1 Inverter Technical Specifications

Efficiency

Technical Specification s

Smart Solar Inverter2KTL-L0

Smart Solar Inverter3KTL-L0

Smart Solar Inverter3.68KTLL0

Smart Solar Inverter4KTL-L0

Smart Solar Inverter4.6KTLL0

Smart Solar Inverter5KTL-L0

Smart Solar Inverter6KTL-L0

Maximum efficiency

98.2%

98.3%

98.4%

European weighted efficiency

96.7%

97.3%

97.5%

97.7%

97.8%

Input

Technical Specification s

Smart Solar Inverter2KTL-L0

Smart Solar Inverter3KTL-L0

Smart Solar Inverter3.68KTLL0

Smart Solar Inverter4KTL-L0

Smart Solar Inverter4.6KTLL0

Smart Solar Inverter5KTL-L0

Smart Solar Inverter6KTL-L0

Maximum

600 V

input voltagea

Maximum input current (per MPPT)

12.5A

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Technical Specification s

Smart Solar Inverter2KTL-L0

Smart Solar Inverter3KTL-L0

Smart Solar Inverter3.68KTLL0

Smart Solar Inverter4KTL-L0

Smart Solar Inverter4.6KTLL0

Smart Solar Inverter5KTL-L0

Smart Solar Inverter6KTL-L0

Maximum short-circuit current (per MPPT)

18 A

Operating

80600 V

voltage range

Startup voltage

100 V

MPPT voltage 90560 V range

Rated input voltage

360 V

Power supply 2

Number of

MPPTs

Note a: The maximum input voltage includes the PV input voltage.

Output

Technical Specification s

Smart Solar Inverter2KTL-L0

Smart Solar Inverter3KTL-L0

Smart Solar Inverter3.68KTLL0

Smart Solar Inverter4KTL-L0

Smart Solar Inverter4.6KTLL0

Smart Solar Inverter5KTL-L0

Smart Solar Inverter6KTL-L0

Rated output 2000 W power

3000 W

3680 W

4000 W

4600 W

5000 Wa 6000 W

Maximum apparent power

2200 VA 3300 VA 3680 VA 4400 VA 5000 VAb 5500 VAc 6000 VA

Rated output 220 V/230 V/240 V voltage

Adapted power grid frequency

50 Hz/60 Hz

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Technical Specification s

Smart Solar Inverter2KTL-L0

Smart Solar Inverter3KTL-L0

Smart Solar Inverter3.68KTLL0

Smart Solar Inverter4KTL-L0

Smart Solar Inverter4.6KTLL0

Smart Solar Inverter5KTL-L0

Smart Solar Inverter6KTL-L0

Maximum output current

10 A

15 A

16 A

20 A

23 Ad

25 Ad

27.3 A

Power factor 0.8 leading and 0.8 lagging

Maximum total harmonic distortion (rated power)

Note a: The rated output power is 5000 W for the AS4777 grid code. Note b: The maximum apparent power is 4600 VA for the VDE-AR-N 4105 grid code, and 4999
VA for the AS4777 grid code. Note c: The maximum apparent power is 5000 VA for the AS4777 grid code. Note d: The maximum output current is 21.7 A of the AS4777 grid code.

Protection

Technical Specification s

Smart Solar Inverter2KTL-L0

Smart Solar Inverter3KTL-L0

Smart Solar Inverter3.68KTLL0

Smart Solar Inverter4KTL-L0

Smart Solar Inverter4.6KTLL0

Smart Solar Inverter5KTL-L0

Smart Solar Inverter6KTL-L0

Anti-islanding Supported protection

DC reverse polarity protection

Supported

Insulation resistance detection

Supported

Residual current monitoring unit (RCMU)

Supported
This inverter includes an integrated residual current device (RCD).
If an external residual current device (RCD) is used, a device of type A should be used, with a tripping current of 100 mA or higher.

AC shortcircuit protection

Supported

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Technical Specification s

Smart Solar Inverter2KTL-L0

Smart Solar Inverter3KTL-L0

Smart Solar Inverter3.68KTLL0

Smart Solar Inverter4KTL-L0

Smart Solar Inverter4.6KTLL0

Smart Solar Inverter5KTL-L0

Smart Solar Inverter6KTL-L0

AC overcurrent protection

Supported

Overtemperat Supported ure protection

DC surge protection

Supported

AC surge protection

Supported

AC overvoltage protection

Supported

Arc fault protection

Supported

Communications

Technical Specification s

Smart Solar Inverter2KTL-L0

Smart Solar Inverter3KTL-L0

Smart Solar Inverter3.68KTLL0

Smart Solar Inverter4KTL-L0

Smart Solar Inverter4.6KTLL0

Smart Solar Inverter5KTL-L0

Smart Solar Inverter6KTL-L0

Display

LED indicators; WLAN+App

WLAN

Supported

RS485

Supported

Maximum RS485 communicatio n distance

1000 m

Communicati WLAN-FE (optional)/4G (optional) ons expansion module

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Common Parameters

Technical Specification s

Smart Solar Inverter -2KTLL0

Smart Solar Inverter -3KTLL0

Smart Solar Inverter -3.68KT L-L0

Smart Solar Inverter -4KTLL0

Smart Solar Inverter -4.6KTLL0

Smart Solar Inverter -5KTLL0

Smart Solar Inverter-6KTLL0

Topology

Transformerless

IP rating

IP65

Cooling mode Natural cooling

Dimensions (H x W x D)

365 mm x 365 mm x 156 mm (including the mounting bracket)

Weight

12 kg

Operating temperature

25°C to +60°C (derated when the temperature is higher than +45°C)

25°C to +60°C (derated when the temperature is higher than +40°C)

Humidity

0100% RH

Operating altitude

04000 m (derated above 2000 m)

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A Grid Code

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

Table A-1 Grid Code

Nationa l/
Regiona l Grid Code

Descripti on

Smart Solar Inverter -2KTLL0

Smart Solar Inverter -3KTLL0

Smart Solar Inverter -3.68KT L-L0

Smart Solar Inverter -4KTLL0

Smart Solar Inverter -4.6KTLL0

Smart Solar Inverter -5KTLL0

Smart Solar Inverter -6KTLL0

VDE-AR- Germany Support Support Support Support Support -

N-4105 LV power ed

grid

UTE C 15-7121(A)

France mainland power grid

Support ed

UTE C 15-7121(B)

France island power grid

Support Support Support Support Support Support Support

UTE C 15-7121(C)

France island power grid

Support Support Support Support Support Support Support

CEI0-21

Italy power grid

Support Support Support Support Support Support Support

RD1699/ Spain LV

661

power

grid

Support ed

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A Grid Code

Nationa l/
Regiona l Grid Code

Descripti on

Smart Solar Inverter -2KTLL0

Smart Solar Inverter -3KTLL0

Smart Solar Inverter -3.68KT L-L0

Smart Solar Inverter -4KTLL0

Smart Solar Inverter -4.6KTLL0

Smart Solar Inverter -5KTLL0

Smart Solar Inverter -6KTLL0

C10/11

Belgium power grid

Support Support Support Support Support Support -

AUSTRA Australia Support Support -

LIA-

power

AS4777_ grid

A-LV230

Support Support Support Support

AUSTRA Australia Support Support -

LIA-

power

AS4777_ grid

B-LV230

Support Support Support Support

AUSTRA Australia Support Support -

LIA-

power

AS4777_ grid

C-LV230

Support Support Support Support

AUSTRA LIAAS4777_ NZLV230

New Zealand Power grid

Support Support -

Support Support Support Support

IEC6172 7

IEC 61727 LV (50 Hz)

Support ed

IEC6172 7-60Hz

IEC 61727 LV (60 Hz)

Support ed

TAI-PEA Thailand -

Support -

grid-tied

standard

power

grid

TAI-MEA Thailand -

Support -

grid-tied

standard

power

grid

EN5054 9-LV

Ireland power grid

Support Support Support Support Support Support Support

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Nationa l/
Regiona l Grid Code

Descripti on

Smart Solar Inverter -2KTLL0

Smart Solar Inverter -3KTLL0

Smart Solar Inverter -3.68KT L-L0

Smart Solar Inverter -4KTLL0

Smart Solar Inverter -4.6KTLL0

Smart Solar Inverter -5KTLL0

Smart Solar Inverter -6KTLL0

EN5054 Sweden

9-SE

Support Support Support Support Support Support Support

ABNT NBR 16149

Brazil power grid

Support Support -

Support ed

Support Support

FuelEngineGrid

Diesel generator hybrid power grid

Support ed

FuelEngineGrid-60 Hz

Diesel generator hybrid power grid

Support ed

Austria Austrian Support Support Support -

power

grid

G98

UK G98 Support Support Support -

power

grid

G99TYPEALV

UK G99_Type A_LV power grid

Support ed

NRS-097 -2-1

South Africa Power Grid

Support Support Support Support Support

SWITZE RLANDNA/EEA: 2020LV230

Switzerla nd

Support ed

SINGAP ORE

Singapor e LV power grid

Support ed

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SUN600-(5KTL, 6KTL)-L0 User Manual

A Grid Code

Nationa l/
Regiona l Grid Code

Descripti on

Smart Solar Inverter -2KTLL0

Smart Solar Inverter -3KTLL0

Smart Solar Inverter -3.68KT L-L0

Smart Solar Inverter -4KTLL0

Smart Solar Inverter -4.6KTLL0

Smart Solar Inverter -5KTLL0

Smart Solar Inverter -6KTLL0

HONGK ONG

Hong Kong LV power grid

Support Support Support Support Support Support Support

DUBAI

DUBAI LV Support Support Support Support -

power

grid

Support Support

IslandGrid

Support Support Support Support -

Support Support

DANMA Denmark Support Support Support Support -

RK-

EN5054

9-DK1-

LV230

Support Support

DANMA Denmark Support Support Support Support -

RK-

EN5054

9-DK2-

LV230

Support Support

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SUN600-(5KTL, 6KTL)-L0 User Manual

B Device Commissioning

B Device Commissioning
Step 1 Access Device Commissioning screen. Figure B-1 Method 1: before login (not connected to the Internet)

Figure B-2 Method 2: after login (connected to the Internet)

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B Device Commissioning

Step 2 Connect to the solar inverter WLAN and log in to the device commissioning screen as the installer user.

NOTICE
If the mobile phone is directly connected to the inverter, the visible distance between the inverter and the mobile phone must be less than 3 m when a built-in antenna is used and less than 50 m when an external antenna is used to ensure the communication quality between the app and the inverter. The distances are for reference only and may vary with mobile phones and shielding conditions.
When connecting the inverter to the WLAN over a router, ensure that the mobile phone and inverter are in the WLAN coverage of the router and the inverter is connected to the router.
The router supports WLAN (IEEE 802.11 b/g/n, 2.4 GHz) and the WLAN signal reaches the inverter.
The WPA, WPA2, or WPA/WPA2 encryption mode is recommended for routers. Enterprise-level encryption is not supported (for example, public hotspots requiring authentication such as airport WLAN). WEP and WPA TKIP are not recommended because these two encryption modes have serious security defects. If the access fails in WEP mode, log in to the router and change the encryption mode of the router to WPA2 or WPA/WPA2.
NOTE
Obtain the initial password for connecting to the solar inverter WLAN from the label on the side of the solar inverter.
Set the password at the first login. To ensure account security, change the password periodically and keep the new password in mind. Not changing the initial password may cause password disclosure. A password left unchanged for a long period of time may be stolen or cracked. If a password is lost, devices cannot be accessed. In these cases, the user is liable for any loss caused to the PV plant.
When you access the Device Commissioning screen of the inverter for the first time, you need to manually set the login password because the inverter does not have an initial login password.

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Figure B-3 Quick settings

B Device Commissioning

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C Setting Power Adjustment Parameters

C Setting Power Adjustment Parameters
Prerequisites
You have logged in to the app as installer.
Procedure
Step 1 On the home screen, tap Power Adjustment and set power parameters as required. Figure C-1 Setting Power Adjustment Parameters

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C Setting Power Adjustment Parameters

NOTE
Power Quality Response Modes supported by the inverter can be implemented by setting Voltage rise suppression parameters.
Power derating for voltage variation (Volt-Watt mode): The inverter power output will vary in response to the AC grid voltage. This is switched on by default. This mode can be enabled via the configuration App. Please refer to the Set Q-U and P-U through FusionSolar APP, or contact Technical Support for more information.
Reactive power regulation for voltage variation (Volt-VAr mode): The power output or input will vary in response to the AC grid voltage. This function is switched off by default. This mode can be enabled via the configuration App. Please refer to the Set Q-U and P-U through FusionSolar APP, or contact Technical Support for more information.
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SUN600-(5KTL, 6KTL)-L0 User Manual

D Resetting Password

D Resetting Password
Step 1 Ensure that the inverter connects to the AC and DC power supplies at the same time. Indicators and are steady green or blink at long intervals for more than 3 minutes.
Step 2 Perform the following operations within 3 minutes: 1. Turn off the AC switch and set the DC switch at the bottom of the inverter to OFF. Wait until all the LED indicators on the inverter panel turn off. 2. Turn on the AC switch and set the DC switch to ON. Ensure that the indicator is blinking green at long intervals. 3. Turn off the AC switch and set the DC switch to OFF. Wait until all LED indicators on the inverter panel are off. 4. Turn on the AC switch and set the DC switch to ON. Wait until all indicators on the solar inverter panel blink and turn off 30 seconds later.
Step 3 Reset the password within 10 minutes. (If no operation is performed within 10 minutes, all inverter parameters remain unchanged.) 1. Wait until the indicator blinks green at long intervals. 2. Obtain the initial WLAN hotspot name (SSID) and initial password (PSW) from the label on the side of the inverter and connect to the app. 3. On the login screen, set a new login password and log in to the app.
Figure D-1 Setting the password

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D Resetting Password

Step 4 Set router and management system parameters to implement remote management.
Setting router parameters
Log in to the FusionSolar app, choose Device Commissioning > Settings > Communication configuration > Router connection settings, and set router parameters.

Figure D-2 Setting router parameters

Setting management system parameters Log in to the FusionSolar app, choose Device Commissioning > Settings > Communication configuration > Management System Configuration, and set management system parameters.
Figure D-3 Setting management system parameters

(Optional) Resetting the WLAN password
Log in to the FusionSolar app, choose Device Commissioning > Settings > Communication configuration > Inverter WLAN settings, and reset the WLAN password.

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Figure D-4 Resetting the WLAN password

D Resetting Password

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E Rapid Shutdown

E Rapid Shutdown
Perform the following step to trigger rapid shutdown: Method 1: Turn off the AC switch between the solar inverter and the power
grid. Method 2: Turn off the DC switch at the bottom of the inverter. (If an extra
DC switch is connected to the input side of the inverter, turning off this DC switch will not trigger rapid shutdown.)

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SUN600-(5KTL, 6KTL)-L0 User Manual

F Locating Insulation Resistance Faults

If the ground resistance of a PV string connected to a solar inverter is too low, the solar inverter generates a Low Insulation Resistance alarm.
The possible causes are as follows:
A short circuit occurs between the PV array and the ground.
The ambient air of the PV array is damp and the insulation between the PV array and the ground is poor.
To locate the fault, connect each PV string to a solar inverter, power on and check the solar inverter, and locate the fault based on the alarm information reported by the FusionSolar app. Perform the following steps to locate an insulation resistance fault.

NOTICE
If two or more ground insulation faults occur in a single PV string, the following method cannot locate the fault. You need to check the PV modules one by one.

Step 1 The AC power supply is connected, and set the DC switch at the bottom of the solar inverter to OFF.
Step 2 Connect each PV string to the solar inverter and set the DC switch to ON. If the solar inverter status is Shutdown: Command, choose Device Commissioning > Maintenance > Inverter ON/OFF on the app and send a startup command.
Step 3 Log in to the FusionSolar app and choose My > Device Commissioning. On the Device Commissioning screen, connect and log in to the solar inverter, and access the Alarm management screen. Check whether the Low Insulation Resistance alarm is reported.
If the Low Insulation Resistance alarm is not reported one minute after the DC is supplied, choose Device Commissioning > Maintenance > Inverter ON/OFF on the app and send a shutdown command. Set the DC switch to OFF and go to Step 2 to connect another PV string to the solar inverter for a check.
If a Low Insulation Resistance alarm is still reported one minute after the DC is supplied, check the percentage for possible short-circuit positions on the Alarm details page and go to Step 4.

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Figure F-1 Alarm details

F Locating Insulation Resistance Faults

NOTE
The positive and negative terminals of a PV string are connected to the PV+ and PV terminals of the solar inverter. The PV terminal represents a possibility of 0% for the short-circuit position and the PV+ terminal represents a possibility of 100% for the short-circuit position. Other percentages indicate that the fault occurs on a PV module or cable in the PV string.
Possible fault position = Total number of PV modules in a PV string x Percentage of possible short-circuit positions. For example, if a PV string consists of 14 PV modules and the percentage of the possible short-circuit position is 34%, the possible fault position is 4.76 (14 x 34%), indicating that the fault is located near PV module 4, including the previous and the next PV modules and the cables of PV module 4. The solar inverter has a detection precision of ±1 PV module.
Step 4 Set the DC switch to OFF and check whether the connector or DC cable between the possible faulty PV modules are damaged.
If yes, replace the damaged connector or DC cable, set the DC switch to ON, and view the alarm information.
If the Low Insulation Resistance alarm is not reported one minute after the DC is supplied, the inspection on the PV string is complete. Choose Device Commissioning > Maintenance > Inverter ON/OFF on the app and send a shutdown command. Set the DC switch to OFF. Go to Step 2 to check other PV strings. Then go to Step 8.
If the Low Insulation Resistance alarm is still reported one minute after the DC is supplied, go to Step 5.
If not, go to Step 5.
Step 5 Set the DC switch to OFF, disconnect the possible faulty PV modules from the PV string, and connect a DC extension cable with an MC4 connector to the adjacent PV modules. Set the DC switch to ON and view the alarm information.
If the Low Insulation Resistance alarm is not reported one minute after the DC is supplied, the fault occurs on the disconnected PV module. Choose Device Commissioning > Maintenance > Inverter ON/OFF on the app and send a shutdown command. Go to Step 7.

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F Locating Insulation Resistance Faults

If the Low Insulation Resistance alarm is still reported one minute after the DC is supplied, the fault does not occur on the disconnected PV module. Go to Step 6.
Step 6 Set the DC switch to OFF, reconnect the removed PV module, and repeat Step 5 to check the adjacent PV modules.
Step 7 Determine the position of the ground insulation fault.
1. Disconnect the possible faulty PV module from. 2. Set the DC switch to OFF. Replace the faulty component to rectify the
insulation resistance fault. Go to Step 2 to check other PV strings. Then go to Step 8.
Step 8 Set the DC switch to ON. If the solar inverter status is Shutdown: Command, choose Device Commissioning > Maintenance > Inverter ON/OFF on the app and send a startup command.
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G DRM Configuration Guide for Standard As NZS4777.2

G DRM Configuration Guide for Standard As NZS4777.2
If Demand Response Modes (DRM0) are required, then the installer will need to connect the Huawei SmartLogger3000. Refer to the Huawei document SmartLogger3000 DRM Configuration Guide for Standard AS NZS4777.2 of how to connect the DRED and how to configure the inverter and Smart Logger for use with the DRED.

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H Acronyms and Abbreviations

A AC
D DC DCI
F FRT
H HVRT
I ID
L LED LVRT
M MAC MPPT
P PE

alternating current
direct current direct current identification
fault ride through
high voltage ride-through
identifier
light emitting diode low voltage ride-through
Media Access Control maximum power point tracking
protective earthing

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PV
R RCMU RH
S SN

H Acronyms and Abbreviations photovoltaic
residual current monitoring unit relative humidity
serial number

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Antenna House PDF Output Library 6.2.680 (Windows)