Huawei SUN2000 Series User manual

SUN2000-4.95KTL-JPL0
User Manual
Issue
03
Date
2020-06-03
HUAWEI TECHNOLOGIES CO., LTD.

Issue 03 (2020-06-03)
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

SUN2000-4.95KTL-JPL0
User Manual
About This Document
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
ii
About This Document
Purpose
This document describes the SUN2000-4.95KTL-JPL0 in terms of its installation, electrical
connection, commissioning, maintenance, and troubleshooting. Before installing and
operating the solar inverter, ensure that you are familiar with the features, functions, and
safety precautions provided in this document.
Intended Audience
This document is intended for:
Installers
Users
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol
Description
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, may 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.
Calls attention to important information, best practices and
tips.
NOTE is used to address information not related to personal
injury, equipment damage, and environment deterioration.

SUN2000-4.95KTL-JPL0
User Manual
About This Document
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
iii
Change History
Changes between document issues are cumulative. The latest document issue contains all the
changes made in earlier issues.
Issue 03 (2020-06-03)
Updated C Restoring the Factory Defaults of a Solar Inverter.
Issue 02 (2020-02-06)
Updated 5.5 Connecting a Signal Cable.
Issue 01 (2019-11-01)
This issue is used for first office application (FOA).

SUN2000-4.95KTL-JPL0
User Manual
Contents
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
iv
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 Overview .........................................................................................................................7
2.1 Overview ......................................................................................................................................................................7
2.2 Appearance ...................................................................................................................................................................9
2.3 Label Description........................................................................................................................................................10
2.4 Working Principle.......................................................................................................................................................12
3 Storage...........................................................................................................................................15
4 Installation....................................................................................................................................16
4.1 Checking Before Installation ......................................................................................................................................16
4.2 Tools and Instruments.................................................................................................................................................17
4.3 Determining the Installation Position .........................................................................................................................18
4.4 Installing the Mounting Bracket .................................................................................................................................23
4.4.1 Wall-mounted Installation........................................................................................................................................24
4.4.2 Support-mounted Installation ..................................................................................................................................25
4.5 Installing a Solar Inverter ...........................................................................................................................................27
5 Electrical Connections................................................................................................................29
5.1 Preparing Cables.........................................................................................................................................................30
5.2 Connecting a PE Cable ...............................................................................................................................................30
5.3 Connecting an AC Output Power Cable .....................................................................................................................32
5.4 Installing DC Input Power Cables ..............................................................................................................................35
5.5 Connecting a Signal Cable..........................................................................................................................................39
6 System Commissioning .............................................................................................................42

SUN2000-4.95KTL-JPL0
User Manual
Contents
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
v
6.1 Checking Before Power-On........................................................................................................................................42
6.2 Powering On the System.............................................................................................................................................43
6.3 Powering Off the System............................................................................................................................................43
7 System Maintenance...................................................................................................................45
7.1 Routine Maintenance..................................................................................................................................................45
7.2 Troubleshooting..........................................................................................................................................................46
8 Handling a Solar Inverter..........................................................................................................52
8.1 Removing a Solar Inverter..........................................................................................................................................52
8.2 Packing a Solar Inverter..............................................................................................................................................52
8.3 Disposing of a Solar Inverter......................................................................................................................................52
A Technical Specifications...........................................................................................................53
B Grid Code.....................................................................................................................................56
C Restoring the Factory Defaults of a Solar Inverter ..............................................................57
D Acronyms and Abbreviations..................................................................................................59

SUN2000-4.95KTL-JPL0
User Manual
1 Safety Information
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
1
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

SUN2000-4.95KTL-JPL0
User Manual
1 Safety Information
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
2
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).

SUN2000-4.95KTL-JPL0
User Manual
1 Safety Information
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
3
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.
Before connecting a power cable, check that the label on the power cable is correct.

SUN2000-4.95KTL-JPL0
User Manual
1 Safety Information
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
4
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.

SUN2000-4.95KTL-JPL0
User Manual
1 Safety Information
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
5
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.

SUN2000-4.95KTL-JPL0
User Manual
1 Safety Information
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
6
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.

SUN2000-4.95KTL-JPL0
User Manual
2 Product Overview
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
7
2 Product Overview
2.1 Overview
Function
The SUN2000 solar inverter is a single-phase grid-tied PV string inverter that converts the
DC power generated by PV strings into AC power and feeds the power into the power grid.
Model
Figure 2-1 Model description
Table 2-1 Model description
Label
Meaning
Description
1
Series
SUN2000: single-phase grid-tied PV string inverter
2
Power
4.95K: The power level is 4.95 kW
3
Topology
TL: transformerless
4
Region
JP: Japan
5
Design code
L0: single-phase inverter
Networking
The solar inverter applies to residential rooftop grid-tied systems. Typically, a grid-tied system
consists of the PV string, grid-tied solar inverter, AC combiner box, and management system.

SUN2000-4.95KTL-JPL0
User Manual
2 Product Overview
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
8
Figure 2-2 Networking (dashed boxes indicate optional components)
A maximum of 10 solar inverters can be cascaded.
(A) PV string
(B) SUN2000
(C) Combiner box
(D) Power grid
(E) Internet
(F) Management system
Supported Power Grid
The solar inverter supports the single-phase three-wire power grid.
Figure 2-3 Supported power grid

SUN2000-4.95KTL-JPL0
User Manual
2 Product Overview
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
9
2.2 Appearance
Figure 2-4 Appearance
(1) LED indicators
(2) Front panel
(3) Ground point
(4) Mounting kit
(5) Mounting
bracket
(6) Heat sink
(7) DC switch (DC
SWITCH)
(8) DC input
terminals
(PV1+/PV1–)
(9) DC input
terminals
(PV2+/PV2–)
(10) Ventilation
valve
(11) COM port
(COM)
(12) AC output port
(AC)
Table 2-2 LED indicators
Category
Status
Description
Run indication
LED1
LED2
N/A
Steady green
Steady green
The solar inverter operates in
grid-tied mode.
Blinking green
slowly (on for 1s
and then off for
1s)
Off
The DC is on and the AC is
off.

SUN2000-4.95KTL-JPL0
User Manual
2 Product Overview
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
10
Category
Status
Description
Blinking green
slowly (on for 1s
and then off for
1s)
Blinking green
slowly (on for 1s
and then off for
1s)
Both DC and AC are on, and
the solar inverter is not
connected to the power grid.
Off
Off
The DC is off.
Steady red
Steady red
Fault
Communication
indication
LED3
N/A
Blinking green fast (on for 0.2s and
then off for 0.2s)
Communicating
Off
No communication
2.3 Label Description
Enclosure Labels
Table 2-3 Enclosure label description
Label
Name
Meaning
Delayed discharge
Residual voltage exists
after the solar inverter is
powered off. It takes 5
minutes for the solar
inverter to discharge to
the safe voltage.
Burn warning
Do not touch a running
solar inverter because the
shell is hot when the solar
inverter is running.
Electric shock warning
High voltage exists after
the solar inverter is
powered on. Only
qualified and trained
electrical technicians are
allowed to perform
operations on the solar
inverter.
Refer to documentation
Reminds operators to
refer to the documents
shipped with the solar
inverter.

SUN2000-4.95KTL-JPL0
User Manual
2 Product Overview
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
11
Label
Name
Meaning
Grounding
Indicates the position for
connecting the PE cable.
Operation warning
Do not remove the
connector when the solar
inverter is running.
Serial number (SN)
Indicates the solar inverter
SN.
Media access control
(MAC) address
Indicates the MAC
address.
The labels are for reference only.
Nameplate
Figure 2-5 Nameplate
(1) Trademark and product model
(2) Key technical specifications
(3) Compliance symbols
(4) Company name and country of origin

SUN2000-4.95KTL-JPL0
User Manual
2 Product Overview
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
12
The nameplate figure is for reference only.
2.4 Working Principle
Schematic Diagram
The solar inverter receives inputs from up to four PV strings. Then the inputs are grouped into
two MPPT routes inside the solar inverter 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 andAC sides.
Figure 2-6 Schematic diagram

SUN2000-4.95KTL-JPL0
User Manual
2 Product Overview
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
13
Working Mode
Figure 2-7 Working mode
Table 2-4 Working mode description
Working
Mode
Description
Standby
The solar inverter enters the standby mode when the external environment
does not meet the requirements for starting the solar inverter. In the standby
mode:
The solar inverter continuously checks its status and enters the operating
mode once the operating requirements are met.
The solar inverter enters the shutdown mode after detecting a shutdown
command or a fault after startup.
Operating
In operating mode:
The solar inverter converts DC power from PV strings into AC power
and feeds the power to the power grid.
The solar inverter tracks the maximum power point to maximize the PV
string output.
The solar inverter 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.

SUN2000-4.95KTL-JPL0
User Manual
2 Product Overview
Issue 03 (2020-06-03)
Copyright © Huawei Technologies Co., Ltd.
14
Working
Mode
Description
Shutdown
In standby or operating mode, the solar inverter enters shutdown mode
after detecting a fault or shutdown command.
In shutdown mode, the solar inverter enters standby mode after detecting
a startup command or detecting that the fault has been rectified.