Huawei SUN2000 Series User manual

SUN2000-(3KTL-10KTL)
User Manual
Issue
02
Date
2019-04-30
HUAWEI TECHNOLOGIES CO., LTD.

Issue 02 (2019-04-30)
Copyright © Huawei Technologies Co., Ltd.
Page 2 of 81
Copyright © Huawei Technologies Co., Ltd. 2019. 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:
http://e.huawei.com

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User Manual
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Contents
About This Document.....................................................................................................................5
1 Safety Precautions.........................................................................................................................7
2 Overview.......................................................................................................................................10
2.1 Product Introduction ...................................................................................................................................................10
2.2 Appearance .................................................................................................................................................................13
2.3 Label Description........................................................................................................................................................15
2.3.1 Enclosure Labels......................................................................................................................................................15
2.3.2 Product Nameplate...................................................................................................................................................16
2.4 Working Principles......................................................................................................................................................17
2.4.1 Circuit Diagram .......................................................................................................................................................17
2.4.2 Working Modes........................................................................................................................................................17
3 Storage...........................................................................................................................................20
4 Installation....................................................................................................................................21
4.1 Checking Before Installation ......................................................................................................................................21
4.2 Tools ...........................................................................................................................................................................21
4.3 Determining the Installation Position .........................................................................................................................23
4.3.1 Environment Requirements .....................................................................................................................................23
4.3.2 Space Requirements.................................................................................................................................................23
4.4 Installing the Mounting Bracket .................................................................................................................................27
4.4.1 Wall-mounted Installation........................................................................................................................................28
4.4.2 Support-mounted Installation ..................................................................................................................................30
5 Electrical Connections................................................................................................................34
5.1 Preparing for Installation ............................................................................................................................................35
5.2 Connecting the PE cable.............................................................................................................................................37
5.3 Connecting the AC Output Power Cable ....................................................................................................................39
5.4 Connecting the DC input power cable........................................................................................................................43
5.5 (Optional) Installing the Smart Dongle.......................................................................................................................48
5.6 (Optional) Installing the Signal Cable ........................................................................................................................48
5.6.1 Connecting the RS485 Communications Cable (Inverter Cascading) .....................................................................51
5.6.2 Connecting the RS485 Communications Cable (Smart Power Sensor)...................................................................52
5.6.3 Connecting the Power Grid Scheduling Signal Cable .............................................................................................55

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6 Commissioning............................................................................................................................58
6.1 Check Before Power-On.............................................................................................................................................58
6.2 Powering On the System.............................................................................................................................................59
6.3 Powering Off the System............................................................................................................................................59
7 Maintenance.................................................................................................................................60
7.1 Routine Maintenance..................................................................................................................................................60
7.2 Troubleshooting..........................................................................................................................................................61
8 Handling the Inverter.................................................................................................................68
8.1 Removing the SUN2000.............................................................................................................................................68
8.2 Packing the SUN2000.................................................................................................................................................68
8.3 Disposing of the SUN2000.........................................................................................................................................68
9 Technical Data .............................................................................................................................69
A Grid Codes...................................................................................................................................74
B Starting Built-in PID Repair.....................................................................................................77
C Setting Dry Contact Scheduling Parameters ........................................................................78
D Acronyms and Abbreviations..................................................................................................80

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About This Document
Purpose
This document describes the SUN2000-3KTL-M0, SUN2000-4KTL-M0,
SUN2000-5KTL-M0, SUN2000-6KTL-M0, SUN2000-8KTL-M0, and SUN2000-10KTL-M0
(SUN2000 for short) in terms of installation, electrical connections, commissioning,
maintenance, and troubleshooting. Read this document through, understand the safety
information, and get familiar with the functions and features of the SUN2000 before installing
and operating it.
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 serious injury
or death.
Indicates a potentially hazardous situation which,
if not avoided, could result in serious injury or
death.
Indicates a potentially hazardous situation which,
if not avoided, may result in minor or moderate
injury.

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Symbol
Description
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, or
environment deterioration.
Change History
Changes between document issues are cumulative. The latest document issue contains all
updates made in previous issues.
Issue 02 (2019-04-30)
This issue is the second official release.
Issue 01 (2018-12-30)
This issue is used for first office application (FOA).

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1 Safety Precautions
Safety
Before performing operations, read through this manual and follow all the precautions to
prevent accidents. The DANGER, WARNING, CAUTION, and NOTICE statements in
this document do not represent all the safety instructions. They are only supplements to the
safety instructions.
Only certified electricians are allowed to install, connect cables for, commission, maintain,
and troubleshoot Huawei products, and they must understand basic safety precautions to
avoid hazards.
When operating Huawei equipment, in addition to following the general precautions in this
document, follow the specific safety instructions given by Huawei. Huawei will not be liable
for any consequence caused by the violation of the safety operation regulations and design,
production, and usage standards.
Disclaimer
Huawei shall not be liable for any consequence caused by any of the following events:
Damage during transportation
Storage conditions that do not meet the requirements specified in this document.
Incorrect storage, installation, or use
Installation or use by unqualified personnel
Failure to follow the operation instructions and safety precautions in this document
Operation in extreme environments which are not covered in this document
Operation beyond specified ranges.
Unauthorized modifications to the product or software code or removal of the product
Device damage due to force majeure (such as lightning, earthquake, fire, and storm)
Warranty expiration without extension of warranty service.
Installation or use in environments which are not specified in relevant international
standards

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Personnel Requirements
Operation personnel should receive professional training.
Operation personnel should read through this document and follow all the precautions.
Operation personnel should be familiar with the safety standards relevant to electrical
systems.
Operation personnel should understand the composition and working principles of the
grid-tied PV system and be aware of local regulations.
Operation personnel must wear proper personal protective equipment (PPE).
Protecting Labels
Do not scrawl, damage, or block any warning label on the device.
Installation
Never power on the SUN2000 during installation.
Ensure that the SUN2000 is not connected to a power supply or powered on before
finishing installation.
Ensure that the SUN2000 is installed in a well-ventilated environment.
Ensure that the SUN2000 heat sinks are free from blockage.
Do not open the front panel of the SUN2000.
Do not remove the terminals and ports at the bottom of the SUN2000.
Grounding
When installing the device, always make the ground connection first and disconnect it in
the end.
Do not damage the ground conductor.
Electrical Connections
Before connecting cables, ensure that the SUN2000 is secured in position and not damaged in
any way. Otherwise, electric shock or fire may occur.
Ensure that all electrical connections comply with local electrical standards.
Obtain approval from the local utility company before using the SUN2000 to generate
electricity in grid-tied mode.
Ensure that the cables used in a grid-tied PV system are properly connected and insulated
and meet all specification requirements.

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Operation
High voltage may cause an electric shock, which results in serious property damage, serious
injury, or death from the SUN2000 in operation. Strictly comply with the safety precautions in
this document and associated documents when operating the SUN2000.
Before operating a device, ensure that it is properly grounded.
Do not touch an energized SUN2000 because the heat sink reaches a high temperature.
Follow local laws and regulations when operating the equipment.
Commissioning
When the SUN2000 is powered on for the first time, only qualified personnel are allowed to
set the parameters on Quick Setting. Incorrect settings may cause the SUN2000 to conflict
with the local certification, which affects the normal operation of the SUN2000.
Maintenance and Replacement
High voltage may cause an electric shock, which results in serious property damage, serious
injury, or death, or serious property damage from the SUN2000 in operation. Prior to
maintenance, power off the SUN2000 and strictly comply with the safety precautions in this
document and associated documents when operating the SUN2000.
A faulty SUN2000 requires overall maintenance. Contact your dealer if the SUN2000 is
faulty.
Maintain the SUN2000 with sufficient knowledge of this document, proper tools, and
testing equipment.
Before maintaining the SUN2000, power it off and follow the instructions on the delay
discharge label. Wait for a proper time to operate the SUN2000.
Place temporary warning signs or erect fences to prevent unauthorized access to the
maintenance site.
Rectify any fault that may compromise the SUN2000 security performance before
powering it on again.
Observe ESD precautions during maintenance.

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2 Overview
2.1 Product Introduction
Function
The SUN2000 is a three-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.
This document involves the following product models:
SUN2000-3KTL-M0
SUN2000-4KTL-M0
SUN2000-5KTL-M0
SUN2000-6KTL-M0
SUN2000-8KTL-M0
SUN2000-10KTL-M0
Figure 2-1 Model description (SUN2000-5KTL-M0 as an example)
Table 2-1 Model description
Icon
Meaning
Description
1
Product
SUN2000: three-phase grid-tied PV string inverter

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Icon
Meaning
Description
2
Power level
3K: The rated power is 3 kW.
4K: The rated power is 4 kW.
5K: The rated power is 5 kW.
6K: The rated power is 6 kW.
8K: The rated power is 8 kW.
10K: The rated power is 10 kW.
3
Topology
TL: transformerless
4
Product code
M0: the product series with the 1100 V DC input
voltage
Network Application
The SUN2000 applies to grid-tied PV systems for residential rooftops and small ground plants.
Typically, a grid-tied system consists of the PV string, grid-tied inverter, residual current
device (RCD), and power distribution unit.
Figure 2-2 Networking application (optional in dashed boxes)
indicates a power cable, indicates a signal cable, indicates wireless communication.
(A) PV module
(B) DC switch
(C) SUN2000
(D) AC switch
(E) ACDU
(F) Smart Power Sensor

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(G) Power grid
(J) Router
(M) Load
(H) 4G Smart Dongle
(K) Remote management
system
(N) Ripple Control Device
(I) WLAN Smart Dongle
(L) Local app
Supported Power Grids
Power grid types supported by the SUN2000 include TN-S, TN-C, TN-C-S, TT, and IT.
Figure 2-3 Supported power grids
In a TT power grid, the N-PE voltage should be lower than 30 V.
In an IT power grid, you need to set Isolation settings to Input not grounded, with a transformer,
then the built-in PID repair is disabled.

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2.2 Appearance
Figure 2-4 Appearance
(1) LED indicator
(2) Front panel
(3) Mounting plate
(4) Heat sink
(5) Ventilation valve
(6) Ground screw
(7) AC output port (AC)
(8) Communication port (COM)
(9) Smart Dongle port (GPRS/4G/WLAN)
(10) Battery terminals (BAT+/BAT–)
(reserved)
(11) DC input terminals (PV2+/PV2–)
(12) DC input terminals (PV1+/PV1–)
(13) DC switch (DC SWITCH)
Two M6 screw holes are reserved on the sides of the enclosure for installing an awning.
Table 2-2 LED indicator description
Category
Status
Meaning
Running
indication
LED 1
LED 2
N/A
Steady green
Steady green
The SUN2000 is operating in
grid-tied mode.

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Category
Status
Meaning
Blinking green at
long intervals (on
for 1s and then
off for 1s)
Off
The DC is on and the AC is
off.
Blinking green at
long intervals (on
for 1s and then
off for 1s)
Blinking green at
long intervals (on
for 1s and then
off for 1s)
The DC is on, the AC is on,
and the SUN2000 is not
exporting power to the power
grid.
Off
Blinking green at
long intervals
DC is off and AC is on.
Off
Off
DC and AC are both off..
Blinking red at
short intervals
(on for 0.2s and
then off for 0.2s)
N/A
DC environmental alarm
N/A
Blinking red at
short intervals
(on for 0.2s and
then off for 0.2s)
AC environmental alarm
Steady red
Steady red
Fault
Communication
indication
LED 3
N/A
Blinking green at short intervals (on
for 0.2s and then off for 0.2s)
Communication is in
progress. (When a mobile
phone is connected to the
SUN2000, the indicator first
indicates that the phone is
connected to the SUN2000):
blinks green at long
intervals.)
Blinking green at long intervals (on
for 1s and then off for 1s)
The mobile phone is
connected to the SUN2000.
Off
There is no communication.

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2.3 Label Description
2.3.1 Enclosure Labels
Symbol
Name
Meaning
Delayed discharge
Residual voltage exists
after the SUN2000 is
powered off. 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
label
High voltage exists
after the SUN2000 is
powered on. Only
qualified and trained
electrical technicians
are allowed to perform
operations on the
SUN2000.
High contact current
exists after the
SUN2000 is powered
on. Ensure that the
SUN2000 has been
grounded before
powering on it.
Refer to documentation
Reminds operators to
refer to the documents
shipped with the
SUN2000.
Grounding
Indicates the position for
connecting the protective
earthing (PE) cable.
Operation warning
Do not remove the DC
input connector or the AC
output connector when the
SUN2000 is running.
SUN2000 serial number
(SN) label
Indicates the SUN2000
SN.

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Symbol
Name
Meaning
SUN2000 MAC address
label
Indicates the MAC
address.
QR code label for
SUN2000 Wi-Fi
connection
Scan the QR code to
connect to Huawei
SUN2000 Wi-Fi network
(Android) or obtain the
Wi-Fi password (iOS).
2.3.2 Product Nameplate
Figure 2-5 Nameplate (SUN2000-5KTL-M0 as an example)
(1) Trademark and product model
(2) Important technical specifications
(3) Compliance symbols
(4) Company name and country of manufacture
The nameplate figure is for reference only.
Symbol
Name
Meaning
TÜVRheinland certification
mark
The SUN2000 complies with
TÜVRheinland certification
standards.
ConformitéEuropéenne
(CE) certification mark
This product complies with CE
certification standards.

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Symbol
Name
Meaning
Australia RCM certification
mark
This product complies with
Australia RCM certification
standards.
Environmentally friendly use
period (EFUP) mark
The product does not pollute the
environment during the specified
period.
EU waste electrical and
electronic equipment
(WEEE) mark
Do not dispose of the product as
household garbage.
2.4 Working Principles
2.4.1 Circuit Diagram
Two PV strings connect to the SUN2000, and their maximum power points are tracked by two
maximum power point tracking (MPPT) circuits. The SUN2000 converts DC power into
three-phase AC power through an inverter circuit. Surge protection is supported on both the
DC and AC sides.
Figure 2-6 SUN2000 conceptual diagram
2.4.2 Working Modes
The SUN2000 can work in Standby, Operating, or Shutdown mode.

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Figure 2-7 Working modes
Table 2-3 Working mode description
Working
Mode
Description
Standby
The SUN2000 enters Standby mode when the external environment does not
meet the operating requirements. In Standby mode:
The SUN2000 continuously performs status check and enters the
Operating mode once the operating requirements are met.
The SUN2000 enters Shutdown mode after detecting a shutdown
command or a fault after startup.
Operating
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.
If the SUN2000 detects a fault or a shutdown command, it enters the
Shutdown mode.
The SUN2000 enters Standby mode after detecting that the PV string
output power is not suitable for connecting to the power grid for
generating power.

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Working
Mode
Description
Shutdown
In Standby or Operating mode, the SUN2000 enters Shutdown mode
after detecting a fault or shutdown command.
In Shutdown mode, the SUN2000 enters Standby mode after detecting a
startup command or that the fault is rectified.

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3 Storage
The following requirements should be met if the SUN2000 is not put into use directly:
Do not unpack the SUN2000.
Keep the storage temperature at –40°C to +70°C and the humidity at 5%–95% RH.
The SUN2000 should be stored in a clean and dry place and be protected from dust and
water vapor corrosion.
A maximum of eight SUN2000s can be stacked. To avoid personal injury or device
damage, stack SUN2000s with caution to prevent them from falling over.
Periodic inspections are required during the storage. Replace the packing materials if
necessary.
If the SUN2000 has been long-term stored, inspections and tests should be conducted by
qualified personnel before it is put into use.