Huawei SUN2000-2KTL-L1 User manual

SUN2000-(2KTL-5KTL)-L1
User Manual
Issue
01
Date
2020-04-17
HUAWEI TECHNOLOGIES CO., LTD.

Issue 01 (2020-04-17)
Copyright © Huawei Technologies Co., Ltd.
i
Copyright © Huawei Technologies Co., Ltd. 2020. 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

SUN2000-(2KTL-5KTL)-L1
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About This Document
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About This Document
Overview
This document describes the SUN2000-(2KTL-5KTL)-L1 (SUN2000 for short) in terms of its
installation, electrical connection, commissioning, maintenance, and troubleshooting. Before
installing and operating the SUN2000, ensure that you are familiar with the features, functions,
and safety precautions provided in this document.
Intended Audience
This document is applicable to:
Installers
Users
Symbol Conventions
The symbols that may be found in this document are defined as follows.
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 warning information about device or environment
security 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.
Supplements the important information in the main text.
NOTE is used to address information not related to personal
injury, equipment damage, and environment deterioration.

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About This Document
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Change History
Changes between document issues are cumulative. The latest document issue contains all the
changes made in earlier issues.
Issue 01 (2020-04-17)
This issue is the first official release.

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User Manual
Contents
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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
2.4 Working Principles......................................................................................................................................................13
3 SUN2000 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 a SUN2000....................................................................................................................................................23
4.5 Installing a SUN2000 .................................................................................................................................................23
4.5.1 Wall-Mounted Installation .......................................................................................................................................24
4.5.2 Support-Mounted Installation..................................................................................................................................27
5 Electrical Connection..................................................................................................................31
5.1 Preparing Cables.........................................................................................................................................................31
5.2 Connecting PE Cables ................................................................................................................................................34
5.3 Installing a WLAN Antenna .......................................................................................................................................37
5.4 (Optional) Installing a Smart Dongle..........................................................................................................................38
5.5 Connecting an AC Output Power Cable .....................................................................................................................40
5.6 Connecting DC Input Power Cables...........................................................................................................................44
5.7 (Optional) Connecting Battery Cables........................................................................................................................48

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5.8 (Optional) Connecting Signal Cables .........................................................................................................................50
6 System Commissioning .............................................................................................................57
6.1 Verification Before Power-On ....................................................................................................................................57
6.2 System Power-On.......................................................................................................................................................58
7 Man-Machine Interaction..........................................................................................................61
7.1 App Commissioning ...................................................................................................................................................61
7.1.1 Downloading the FusionSolar App..........................................................................................................................61
7.1.2 (Optional) Registering an Installer Account ............................................................................................................62
7.1.3 Creating a PV Plant and a User................................................................................................................................63
7.1.4 (Optional) Setting the Physical Layout of the Smart PV Optimizers.......................................................................63
7.2 Parameters Settings.....................................................................................................................................................65
7.2.1 Energy Control.........................................................................................................................................................65
7.2.1.1 Grid-tied Point Control.........................................................................................................................................65
7.2.1.2 Battery Control .....................................................................................................................................................68
7.2.2 AFCI ........................................................................................................................................................................72
7.2.3 IPS Check (for Italy CEI0-21 Grid Code Only).......................................................................................................73
7.2.4 DRM (Australia AS4777)........................................................................................................................................75
8 System Maintenance...................................................................................................................77
8.1 System Power-Off.......................................................................................................................................................77
8.2 Routine Maintenance..................................................................................................................................................78
8.3 Troubleshooting..........................................................................................................................................................78
9 SUN2000 Disposal.......................................................................................................................87
9.1 Removing a SUN2000................................................................................................................................................87
9.2 Packing a SUN2000....................................................................................................................................................87
9.3 Disposing a SUN2000 ................................................................................................................................................87
10 Technical Parameters................................................................................................................88
10.1 SUN2000 Technical Specifications ..........................................................................................................................88
10.2 Optimizer Technical Specifications ..........................................................................................................................91
A Grid Code ....................................................................................................................................94
B Device Commissioning .............................................................................................................96
C Resetting Password....................................................................................................................99
D Quick-break Protection...........................................................................................................102
E Locating Insulation Resistance Faults ..................................................................................103
F Acronyms and Abbreviations.................................................................................................106

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1 Safety Information
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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.
Huawei will not be liable for any consequence caused by the violation of general safety
requirements or design, production, and usage safety standards.
Ensure that the equipment is used in environments that meet its design specifications.
Otherwise, the equipment may become faulty, and the resulting equipment malfunction,
component damage, personal injuries, or property damage are not covered under the warranty.
Follow local laws and regulations when installing, operating, or maintaining the equipment.
The safety instructions in this document are only supplements to local laws and regulations.
Huawei will not be liable for any consequences of the following circumstances:
Operation beyond the conditions specified in this document
Installation or use in environments which are not specified in relevant international or
national standards
Unauthorized modifications to the product or software code or removal of the product
Failure to follow the operation instructions and safety precautions on the product and in
this document
Equipment damage due to force majeure, such as earthquakes, fire, and storms
Damage caused during transportation by the customer
Storage conditions that do not meet the requirements specified in this document
General Requirements

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Do not work with power on during installation.
Do not install, use, or operate outdoor equipment and cables (including but not limited to
moving equipment, operating equipment and cables, inserting connectors to or removing
connectors from signal ports connected to outdoor facilities, working at heights, and
performing outdoor installation) in harsh weather conditions such as lightning, rain,
snow, and level 6 or stronger wind.
After installing the equipment, remove idle packing materials such as cartons, foam,
plastics, and cable ties from the equipment area.
In the case of a fire, immediately leave the building or the equipment area, and turn on
the fire alarm bell or make an emergency call. Do not enter the building on fire in any
case.
Do not scrawl, damage, or block any warning label on the equipment.
Tighten the screws using tools when installing the equipment.
Understand the components and functioning of a grid-tied PV power system and relevant
local standards.
Repaint any paint scratches caused during equipment transportation or installation in a
timely manner. Equipment with scratches cannot be exposed to an outdoor environment
for a long period of time.
Do not open the host panel of the equipment.
Personal Safety
If there is a probability of personal injury or equipment damage during operations on the
equipment, immediately stop the operations, report the case to the supervisor, and take
feasible protective measures.
Use tools correctly to avoid hurting people or damaging the equipment.
Do not touch the energized equipment, as the enclosure is hot.
1.2 Personnel Requirements
Personnel who plan to install or maintain Huawei equipment must receive thorough
training, understand all necessary safety precautions, and be able to correctly perform all
operations.
Only qualified professionals or trained personnel are allowed to install, operate, and
maintain the equipment.
Only qualified professionals are allowed to remove safety facilities and inspect the
equipment.
Personnel who will operate the equipment, including operators, trained personnel, and
professionals, should possess the local national required qualifications in special
operations such as high-voltage operations, working at heights, and operations of special
equipment.
Only professionals or authorized personnel are allowed to replace the equipment or
components (including software).

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Professionals: personnel who are trained or experienced in equipment operations and are clear of the
sources and degree of various potential hazards in equipment installation, operation, and
maintenance
Trained personnel: personnel who are technically trained, have required experience, are aware of
possible hazards on themselves in certain operations, and are able to take protective measures to
minimize the hazards on themselves and other people
Operators: operation personnel who may come in contact with the equipment, except trained
personnel and professionals
1.3 Electrical Safety
Grounding
For the equipment that needs to be grounded, install the ground cable first when
installing the equipment and remove the ground cable last when removing the
equipment.
Do not damage the ground conductor.
Do not operate the equipment in the absence of a properly installed ground conductor.
Ensure that the equipment is connected permanently to the protective ground. Before
operating the equipment, check its electrical connection to ensure that it is securely
grounded.
General Requirements
Before connecting cables, ensure that the equipment is intact. Otherwise, electric shocks or
fire may occur.
Ensure that all electrical connections comply with local electrical standards.
Obtain approval from the local electric utility company before using the equipment in
grid-tied mode.
Ensure that the cables you prepared meet local regulations.
Use dedicated insulated tools when performing high-voltage operations.
AC and DC Power
Do not connect or disconnect power cables with power on. Transient contact between the core
of the power cable and the conductor will generate electric arcs or sparks, which may cause
fire or personal injury.
Before making electrical connections, switch off the disconnector on the upstream device
to cut off the power supply if people may contact energized components.

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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
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
The SUN2000-(2KTL-5KTL)-L1 is a single-phase grid-tied string inverter that converts the
DC power generated by PV strings intoAC power and feeds the electricity into the power
grid.
Model
This document involves the following product models:
SUN2000-2KTL-L1
SUN2000-3KTL-L1
SUN2000-3.68KTL-L1
SUN2000-4KTL-L1
SUN2000-4.6KTL-L1
SUN2000-5KTL-L1
Figure 2-1 Model identifier (using SUN2000-5KTL-L1 as an example)
Table 2-1 Identifier description
No.
Meaning
Value
1
Series name
SUN2000: grid-tied solar inverter

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No.
Meaning
Value
2
Power level
2K: The power level is 2 kW.
3K: The power level is 3 kW.
3.68K: The power level is 3.68 kW.
4K: The power level is 4 kW.
4.6K: The power level is 4.6 kW.
5K: The power level is 5 kW.
3
Topology
TL: transformerless
4
Design code
L1: residential
Networking Application
The SUN2000 applies to residential rooftop grid-tied systems. The system consists of PV
strings, grid-tied solar inverters,AC switches, and power distribution units (PDUs).
Figure 2-2 Single SUN2000 scenario (dashed boxes indicate optional configuration)

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Figure 2-3 SUN2000 cascading scenario (dashed boxesindicate optional configuration)
indicates the power flow direction, indicates the signal line, and indicates the
wireless communication.
In the SUN2000 cascading scenario, the master and slave solar inverters are both
SUN2000-(2KTL-5KTL)-L1, and a maximum of three SUN2000s can be cascaded.
In the SUN2000 cascading scenario, only one power meter (G in the figure) can be connected to the
master inverter.
In the SUN2000 cascading scenario, the SUN2000s connected to the power grid must meet the local
power grid requirements.
(A) PV string
(B) Smart PV optimizer
(C) DC switch
(D) SUN2000
(E) AC switch
(F) Residential PDU
(G) Power meter
(H) Residential power meter
(I) Power grid
(J) Battery
(K) Battery switch
(L) Household load
(M) FusionSolar app
(N) 4G Smart Dongle
(O) WLAN-FE Smart
Dongle
(P) Router
(Q) FusionSolar Smart PV
Management System
-

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Supported Power Grid Types
The SUN2000 supports the following power grid types: TN-S, TN-C, TN-C-S, and TT. In the
TT power grid, the N-to-PE voltage must be less than 30 V.
Figure 2-4 Power grid types
2.2 Component Description
Appearance
Figure 2-5 Appearance

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(1) LED indicators
(2) Front panel
(3) Hanging kit
(4) Mounting bracket
(5) Heat sink
(6) Ventilation valve
(7) DC switch locking screwholea
(8) DC switchb(DC SWITCH)
(9) DC input terminals (PV1+/PV1–)
(10) DC input terminals (PV2+/PV2–)
(11) Battery terminals (BAT+/BAT–)
(12) Smart Dongle port (4G/FE)
(13) Antenna port (ANT)
(14) Communications port (COM)
(15) AC output port (AC)
(16) Ground point
Note a: The DC switch locking screw is used to lock the DC switch to prevent accidental startup. It
is delivered with the SUN2000.
Note b: DC input terminals PV1 and PV2 are controlled by the DC switch.
2.3 Label Description
Enclosure Labels
Table 2-2 Enclosure label description
Icon
Name
Meaning
Burn warning
Do not touch a running
SUN2000 because the
enclosure is hot when the
SUN2000 is running.
Delayed discharge
High voltage exists
after the SUN2000 is
powered on. Only
qualified and trained
electrical technicians
are allowed to perform
operations on the
SUN2000.
Residual voltage
exists after the
SUN2000 is powered
off. It takes 5 minutes
for the SUN2000 to
discharge to the safe
voltage.

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Icon
Name
Meaning
Refer to documentation
Reminds operators to
refer to the documents
delivered the SUN2000.
Grounding
Indicates the position for
connecting the protective
earthing (PE) cable.
Operation warning
Do not remove the
connector or antenna
when the SUN2000 is
running.
Grounding warning
Ground the SUN2000
before powering it on.
Serial number (SN)
Indicates the SUN2000
SN.
Media access control
(MAC) address
Indicates the MAC
address.
QR code for logging in to
the SUN2000 WLAN
Scan the QR code to
connect to the Huawei
SUN2000 WLAN
(Android) or obtain the
WLAN login password
(iOS).
The labels are for reference only.

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Nameplate
Figure 2-6 Nameplate (using SUN2000-5KTL-L1 as an example)
(1) Trademark and model
(2) Key technical specifications
(3) Compliance symbols
(4) Company name and country of origin
The nameplate figure is for reference only.
2.4 Working Principles
Schematic Diagram
The SUN2000 receives inputs from up to two PV strings. Then the inputs are grouped into
two MPPT routes inside the SUN2000 to track the maximum power point of the PV strings.
The DC power is then converted into single-phaseAC power through an inverter circuit.
Surge protection is supported on both the DC andAC sides.

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The SUN2000 uses a reserved battery port for energy storage expansion. Battery performs
charging and discharging operations according to the battery working mode.
Figure 2-7 Schematic diagram
Working Mode
Figure 2-8 Working mode