Huawei SUN2000-4.95KTL-NHL2 User manual

SUN2000-4.95KTL-NHL2
User Manual
Issue 01
Date 2021-06-20
HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2021. 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 specied in the contract, all statements,
information, and recommendations in this document are provided "AS IS" without warranties, guarantees
or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every eort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address: Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website: https://e.huawei.com
Issue 01 (2021-06-20) Copyright © Huawei Technologies Co., Ltd. i

About This Document
Purpose
This document describes the SUN2000-4.95KTL-NHL2 (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 dened 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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User Manual About This Document
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Symbol Description
Supplements the important information in the main text.
NOTE is used to address information not related to
personal injury, equipment damage, and environment
deterioration.
Change History
Changes between document issues are cumulative. The latest document issue
contains all the changes made in earlier issues.
Issue 01 (2021-06-20)
This issue is the rst ocial release.
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User Manual About This Document
Issue 01 (2021-06-20) Copyright © Huawei Technologies Co., Ltd. iii

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...................................................................................................................15
4 System Installation............................................................................................................... 16
4.1 Checking Before the Installation..................................................................................................................................... 16
4.2 Preparing Tools and Instruments.................................................................................................................................... 17
4.3 Determining the Installation Position............................................................................................................................18
4.4 Moving a SUN2000.............................................................................................................................................................. 21
4.5 Installing a SUN2000........................................................................................................................................................... 22
4.5.1 Wall-Mounted Installation............................................................................................................................................. 23
4.5.2 Support-Mounted Installation.......................................................................................................................................25
5 Electrical Connection............................................................................................................29
5.1 Preparing Cables................................................................................................................................................................... 30
5.2 Connecting PE Cables.......................................................................................................................................................... 31
5.3 Installing a WLAN Antenna...............................................................................................................................................33
5.4 Connecting an AC Output Power Cable........................................................................................................................34
5.5 Connecting DC Input Power Cables................................................................................................................................39
5.6 Connecting Signal Cables................................................................................................................................................... 44
6 System Commissioning........................................................................................................ 49
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6.1 Verication Before Power-On........................................................................................................................................... 49
6.2 System Power-On................................................................................................................................................................. 50
7 Man-Machine Interaction....................................................................................................53
7.1 App Commissioning............................................................................................................................................................. 53
7.1.1 Downloading the FusionSolar App..............................................................................................................................53
7.1.2 (Optional) Registering an Installer Account............................................................................................................ 54
7.1.3 Creating a PV Plant and a User.................................................................................................................................... 55
7.1.4 Logging In to the App...................................................................................................................................................... 55
7.2 SmartLogger WEB Parameters Settings........................................................................................................................ 56
7.2.1 Preparations and WebUI Login..................................................................................................................................... 56
7.2.2 （Optional）Upgrading the SmartLogger................................................................................................................ 60
7.2.3 Commissioning Using Deployment Wizard.............................................................................................................. 60
7.2.4 Creating a Plant................................................................................................................................................................. 61
8 System Maintenance............................................................................................................ 63
8.1 System Power-O.................................................................................................................................................................63
8.2 Routine Maintenance.......................................................................................................................................................... 64
8.3 Troubleshooting..................................................................................................................................................................... 64
9 SUN2000 Disposal................................................................................................................. 84
9.1 Removing a SUN2000......................................................................................................................................................... 84
9.2 Packing a SUN2000..............................................................................................................................................................84
9.3 Disposing a SUN2000.......................................................................................................................................................... 84
10 Technical Parameters......................................................................................................... 85
10.1 SUN2000 Technical Specications................................................................................................................................ 85
A Grid Code................................................................................................................................ 89
B Device Commissioning......................................................................................................... 90
C AFCI.......................................................................................................................................... 92
D Resetting Password.............................................................................................................. 94
E Locating Insulation Resistance Faults.............................................................................. 96
F Acronyms and Abbreviations.............................................................................................. 99
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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
specications. Otherwise, the equipment may become faulty, and the resulting
equipment malfunction, component damage, personal injuries, or property
damage are not covered under the warranty.
Follow local laws and regulations when installing, operating, or maintaining the
equipment. The safety instructions in this document are only supplements to local
laws and regulations.
Huawei will not be liable for any consequences of the following circumstances:
● Operation beyond the conditions specied in this document
● Installation or use in environments which are not specied in relevant
international or national standards
● Unauthorized modications to the product or software code or removal of the
product
● Failure to follow the operation instructions and safety precautions on the
product and in this document
● Equipment damage due to force majeure, such as earthquakes, re, and
storms
● Damage caused during transportation by the customer
● Storage conditions that do not meet the requirements specied in this
document
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General Requirements
D ANGER
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 re, immediately leave the building or the equipment area,
and turn on the re alarm bell or make an emergency call. Do not enter the
building on re in any case.
● Do not scrawl, damage, or block any warning label on the equipment.
● Tighten the screws to the specied torque using tools when installing the
equipment.
● Understand the components and functioning of a grid-tied PV power system
and relevant local standards.
● Repaint any paint scratches caused during equipment transportation or
installation in a timely manner. Equipment with scratches cannot be exposed
to an outdoor environment for a long period of time.
● Do not open the host panel of the equipment.
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 qualied professionals or trained personnel are allowed to install,
operate, and maintain the equipment.
● Only qualied 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
qualications 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).
NO TE
● 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 rst
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
D ANGER
Before connecting cables, ensure that the equipment is intact. Otherwise, electric
shocks or re 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
D ANGER
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 re or personal injury.
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● Before making electrical connections, switch o the disconnector on the
upstream device to cut o the power supply if people may contact energized
components.
● Before connecting a power cable, check that the label on the power cable is
correct.
● If the equipment has multiple inputs, disconnect all the inputs before
operating the equipment.
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 dierent 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 specications.
1.4 Installation Environment Requirements
● Ensure that the equipment is installed in a well ventilated environment.
● To prevent re due to high temperature, ensure that the ventilation vents or
heat dissipation system are not blocked when the equipment is running.
● Do not expose the equipment to ammable 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 berglass ladders when you need to perform live working at
heights.
● When a step ladder is used, ensure that the pull ropes are secured and the
ladder is held rm.
● Before using a ladder, check that it is intact and conrm its load bearing
capacity. Do not overload it.
● Ensure that the wider end of the ladder is at the bottom, or protective
measures have been taken at the bottom to prevent the ladder from sliding.
● Ensure that the ladder is securely positioned. The recommended angle for a
ladder against the oor is 75 degrees, as shown in the following gure. An
angle rule can be used to measure the angle.
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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 oor, 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 rst time, ensure that professional
personnel set parameters correctly. Incorrect settings may result in inconsistency
with local certication and aect the normal operation of the equipment.
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1.7 Maintenance and Replacement
D ANGER
High voltage generated by the equipment during operation may cause an electric
shock, which could result in death, serious injury, or serious property damage.
Prior to maintenance, power o the equipment and strictly comply with the safety
precautions in this document and relevant documents.
● Maintain the equipment with sucient knowledge of this document and
using proper tools and testing equipment.
● Before maintaining the equipment, power it o and follow the instructions on
the delayed discharge label to ensure that the equipment is powered o.
● 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 rectied. Failing to
do so may escalate faults or damage the equipment.
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2 Product Introduction
2.1 Overview
Function
The SUN2000-4.95KTL-NHL2 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.
Model
Figure 2-1 Model identier
Table 2-1 Identier description
No. Meaning Value
1 Series name SUN2000: grid-tied solar inverter
2 Power level 4.95K: The power level is 4.95 kW.
3 Topology TL: transformerless
4 Region NH: Japan
5 Design code L2: Single-phase V2.0
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Networking Application
The SUN2000 applies to a low-voltage single-phase three-wire grid-tied system.
Typically, a grid-tied system consists of the PV string, grid-tied solar inverter, AC
combiner box, and management system.
Figure 2-2 SUN2000-4.95KTL-NHL2 Cascading Scenario
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User Manual 2 Product Introduction
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Figure 2-3 SUN2000-4.95KTL-NHL2 and SUN2000-4.95KTL-JPL1 Cascading
Scenario
NO TE
● indicates the power ow direction, indicates the signal line, and indicates
the wireless communication.
● The SmartLogger is installed in the AC combiner box.
● In Japan's 50 kW (rounded up) low-voltage scenario, the SUN2000-4.95KTL-NHL2
inverter is used, and a maximum of 10 inverters can be cascaded.
● When SUN2000-4.95KTL-NHL2 and SUN2000-4.95KTL-JPL1 inverters are cascaded, the
maximum number of inverters cannot exceed 10.
(A) PV string (B) SUN2000-4.95KTL-
NHL2
(C) AC combiner box
(D) FusionSolar Smart PV
Management System
(E) Power grid (F) SUN2000-4.95KTL-
JPL1
(G) Battery
Supported Power Grid Types
The solar inverter supports the single-phase three-wire power grid.
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Figure 2-4 Power grid types
2.2 Component Description
Appearance
Figure 2-5 Appearance
(1) LED indicators (2) Front panel
(3) Hanging kit (4) Mounting bracket
(5) Heat sink (6) Ventilation valve
(7) DC switch locking screw holea(8) DC switchb (DC SWITCH)
(9) DC input terminals (PV1+/PV1–) (10) DC input terminals (PV2+/PV2–)
(11) Reserved (12)Antenna port (ANT)
(13) Communications port (COM) (14) AC output port (AC)
(15) Ground point
NO TE
● Note a: The DC switch locking screw is used to lock the DC switch to prevent accidental
startup. It is delivered with the SUN2000.
● Note b: DC input terminals PV1 and PV2 are controlled by the DC switch.
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2.3 Label Description
Enclosure Labels
Table 2-2 Enclosure label description
Icon Name Meaning
Delay
discharge
Residual voltage
exists after the
SUN2000 is
powered o. It
takes 5 minutes for
the SUN2000 to
discharge to the
safe voltage.
Burn warning Do not touch a
running SUN2000
because it generates
high temperatures
on the shell.
Electric shock
warning
High voltage exists
after the SUN2000
is powered on. Only
qualied and
trained electrical
technicians are
allowed to perform
operations on the
SUN2000.
Refer to
documentatio
ns
Reminds operators
to refer to the
documentations
delivered with the
SUN2000.
Grounding
label
Indicates the
position for
connecting the PE
cable.
Operation
warning
Do not remove the
connector when the
SUN2000 is
running.
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Icon Name Meaning
SUN2000
serial number
Indicates the serial
number.
SUN2000 MAC
address
Indicates the MAC
address.
NO TE
The labels are for reference only.
Nameplate
Figure 2-6 Nameplate
(1) Trademark and model (2) Key technical specications
(3) Compliance symbols (4) Company name and country of
origin
NO TE
The nameplate gure is for reference only.
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2.4 Working Principles
Schematic Diagram
The SUN2000 receives inputs from up to two PV strings. Then the inputs are
grouped into two MPPT routes inside the SUN2000 to track the maximum power
point of the PV strings. The DC power is then converted into single-phase AC
power through an inverter circuit. Surge protection is supported on both the DC
and AC sides.
Figure 2-7 Schematic diagram
Working Mode
Figure 2-8 Working modes
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Table 2-3 Working mode description
Working
mode
Description
Standby
mode
The SUN2000 enters Standby mode when the external
environment does not meet the requirements for starting the
SUN2000. In Standby mode:
● The SUN2000 continuously detects its operation status. Once
the operating conditions are met, the SUN2000 enters
Operating mode.
● If the SUN2000 detects a shutdown command or a fault after
startup, it enters Shutdown mode.
Operating
mode
In Operating mode:
● The SUN2000 converts DC power from PV strings into AC power
and feeds the power to the power grid.
● The SUN2000 tracks the maximum power point to maximize
the PV string output power.
● The SUN2000 enters shutdown mode after detecting a fault or
a shutdown command, and enters standby mode after detecting
that the PV string output power is not suitable for connecting to
the power grid to produce power.
Shutdown
mode
● In Standby or Operating mode, if the SUN2000 detects a
shutdown command or a fault, it enters Shutdown mode.
● In Shutdown mode, if the SUN2000 detects that the fault is
rectied or the startup command is executed, the SUN2000
enters Standby mode.
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