Huawei SUN2000 Series User manual

SUN2000-(29.9KTL, 33KTL-A, 36KTL, 42KTL)
User Manual
Issue
11
Date
2019-06-08
HUAWEI TECHNOLOGIES CO., LTD.

Issue 11 (2019-06-08)
Copyright © Huawei Technologies Co., Ltd.
i
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:
https://e.huawei.com

SUN2000-(29.9KTL, 33KTL-A, 36KTL, 42KTL)
User Manual
About This Document
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Copyright © Huawei Technologies Co., Ltd.
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About This Document
Purpose
This document describes the SUN2000-29.9KTL/33KTL-A/36KTL/42KTL (SUN2000 for
short) in terms of its installation, electrical connections, commissioning, maintenance, and
troubleshooting. Understand the safety information and get familiar with the SUN2000
functions and features before installing and operating the SUN2000.
Intended Audience
This document is intended for photovoltaic (PV) plant personnel and qualified electrical
technicians.
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol
Description
Indicates a hazard with a high level of risk which, if
not avoided, will result in death or serious injury.
Indicates a hazard with a medium level of risk
which, if not avoided, could result in death or
serious injury.
Indicates a hazard with a low level of risk which, if
not avoided, could result in minor or moderate
injury.
Indicates a potentially hazardous situation which, if
not avoided, could result in equipment damage, data
loss, performance deterioration, or unanticipated
results.
NOTICE is used to address practices not related to
personal injury.

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Symbol
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
updates made in previous issues.
Issue 11 (2019-06-08)
Updated 6.2 Powering On the SUN2000.
Issue 10 (2019-01-03)
Updated 10 Technical Specifications.
Issue 09 (2018-09-14)
Added description about the SUN2000-29.9KTL.
Issue 08 (2018-08-23)
Updated 8.2 Troubleshooting.
Issue 07 (2018-05-04)
Updated 5.3 ConnectingAC Output Power Cables.
Added the description about the metal stamping forming contact in 5.4 Connecting DC Input
Power Cables.
Issue 06 (2017-11-29)
Updated 3 Inverter Storage.
Added the description about rubber fittings, and updated 5.3 ConnectingAC Output Power
Cables.
Updated A Grid Codes.
Issue 05 (2017-09-25)
Added the requirements for OT terminals in 5.3 Connecting AC Output Power Cables.
Issue 04 (2017-07-30)
Updated 2.3 Label Description.
Updated 5.2 Connecting the Ground Cable (PE).

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About This Document
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Updated 10 Technical Specifications.
Issue 03 (2017-03-30)
Added description about the SUN2000-33KTL-A.
Issue 02 (2017-02-20)
Updated Installation Environment Requirements of 4.3 Wall-mounting the SUN2000.
Updated Installation Environment Requirements of 4.4 Support-mounting the SUN2000.
Added the description about the SUN2000-42KTL configured with 4-pin AC terminals in 5.3
Connecting AC Output Power Cables.
Updated 5.4 Connecting DC Input Power Cables.
Updated 8.1 Routine Maintenance.
Issue 01 (2016-07-30)
This issue is the first official release.

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Contents
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Contents
About This Document.................................................................................................................... ii
1 Safety Precautions.........................................................................................................................1
2 Overview.........................................................................................................................................4
2.1 Introduction ..................................................................................................................................................................4
2.2 Appearance ...................................................................................................................................................................6
2.3 Label Description........................................................................................................................................................10
2.4 Working Principle.......................................................................................................................................................12
3 Inverter Storage ...........................................................................................................................15
4 System Installation .....................................................................................................................16
4.1 Checking Before Installation ......................................................................................................................................16
4.2 Tools ...........................................................................................................................................................................17
4.3 Wall-mounting the SUN2000......................................................................................................................................21
4.3.1 Determining the Installation Position ......................................................................................................................21
4.3.2 Moving the Inverter .................................................................................................................................................25
4.3.3 Installing the Mounting Bracket ..............................................................................................................................26
4.3.4 Installing the SUN2000 ...........................................................................................................................................29
4.4 Support-mounting the SUN2000 ................................................................................................................................32
4.4.1 Determining the Installation Position ......................................................................................................................32
4.4.2 Moving the Inverter .................................................................................................................................................34
4.4.3 Installing the Mounting Bracket ..............................................................................................................................34
4.4.4 Installing the SUN2000 ...........................................................................................................................................36
5 Connecting Cables ......................................................................................................................37
5.1 Opening the Maintenance Compartment Door...........................................................................................................37
5.2 Connecting the Ground Cable (PE) ............................................................................................................................39
5.3 Connecting AC Output Power Cables.........................................................................................................................41
5.4 Connecting DC Input Power Cables...........................................................................................................................49
5.5 Connecting Communications Cables..........................................................................................................................56
5.5.1 Communication Mode Description..........................................................................................................................56
5.5.2 Connecting RS485 Communications Cables ...........................................................................................................58
5.5.3 (Optional) Connecting FE Communications Cables................................................................................................64
5.6 Closing the Maintenance Compartment Door ............................................................................................................68

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6 System Commissioning .............................................................................................................71
6.1 Checking Before Power-On........................................................................................................................................71
6.2 Powering On the SUN2000 ........................................................................................................................................71
6.3 Powering Off the SUN2000........................................................................................................................................77
7 Man-Machine Interactions ........................................................................................................78
7.1 Operations with a USB Flash Drive............................................................................................................................78
7.1.1 Exporting Configurations ........................................................................................................................................78
7.1.2 Importing Configurations ........................................................................................................................................80
7.1.3 Exporting Data.........................................................................................................................................................81
7.1.4 Upgrading................................................................................................................................................................81
7.2 Operations with a SmartLogger..................................................................................................................................83
7.3 Operations with the NMS ...........................................................................................................................................83
7.4 Operations with the SUN2000 APP............................................................................................................................83
8 Maintenance.................................................................................................................................84
8.1 Routine Maintenance..................................................................................................................................................84
8.2 Troubleshooting..........................................................................................................................................................85
9 Handling the SUN2000 ..............................................................................................................94
9.1 Removing the SUN2000.............................................................................................................................................94
9.2 Packing the SUN2000.................................................................................................................................................94
9.3 Disposing of the SUN2000.........................................................................................................................................94
10 Technical Specifications ..........................................................................................................95
A Grid Codes.................................................................................................................................100
B Acronyms and Abbreviations ................................................................................................110

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1 Safety Precautions
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1 Safety Precautions
Before performing operations, read through this manual and follow all the precautions to
prevent accidents. The safety precautions provided in this document do not cover all the
safety precautions. Huawei shall 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.
Transportation
The storage conditions do not meet the requirements specified in this document.
Violate the operation instructions and safety precautions in this document for installation,
cable connecting, and maintenance.
Operation in extreme environments which are not covered in this document
Unauthorized modifications to the product or software code
Installation or use in environments which are not specified in related international
standards
Personnel Requirements
Only certified electricians are allowed to install and operate the SUN2000.
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 specifications about the electrical
system.
Operation personnel should understand the composition and working principles of the
grid-tied PV power system and local regulations.
Protect Labels
Do not tamper with any warning labels on the inverter enclosure because these labels
contain important information about safe operation.

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Do not tamper with the nameplate on the inverter enclosure because it contains important
product information.
Installation
Ensure that the inverter is not connected to a power supply and is not powered on before
starting installation.
Ensure that there are no objects within 300 mm, 200 mm, 500 mm, 600 mm, and 1000
mm of the left, right, top, bottom, and front of the inverter, respectively. This is to allow
sufficient space for installation and heat dissipation. For ease of installation, ensure that
the inverter bottom is at most 730 mm above the floor. If you have any questions about
the distance, consult the local technical support engineers.
Ensure that the inverter is installed in a well ventilated environment.
Ensure that the inverter heat sinks are free from blockage.
Open the maintenance compartment door of the chassis before connecting cables. Do not
perform any operation on other components inside the chassis except connecting the PE
cable, AC power cables and communications cables.
Cable Connections
Before connecting cables, ensure that the inverter is secured in position and not damaged in
any way. Otherwise, electric shocks or fire may occur.
Ensure that all electrical connections comply with local electrical standards.
Obtain approval from the local utility company before using the inverter to generate
electricity in grid-tied mode.
Ensure that the cables used in a grid-tied PV system are properly connected and insulated,
meet all specification requirements.
Operation
High voltages may cause electric shocks result in serious injury, death or serious property
damage from inverter in operation. Strictly comply with the safety precautions in this
document and associated documents when operating the inverter.
Do not touch an energized inverter because the heat sink may be over 60ºC.
Follow local laws and regulations when operating the equipment.
Maintenance and Replacement

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High voltages may cause electric shocks result in serious injury, death or serious property
damage from inverter in operation. Prior to maintenance, power off the inverter and strictly
comply with the safety precautions in this document and associated documents to operate the
inverter.
Maintain the inverter with sufficient knowledge of this document and proper tools and
testing equipment.
Before performing maintenance tasks, power off the inverter and wait at least 5 minutes.
Place temporary warning signs or erect fences to prevent unauthorized access to the
maintenance site.
Rectify any faults that may compromise the inverter security performance before
powering on the inverter again.
Observe ESD precautions during the maintenance.
For personal safety, wear insulation gloves and safety shoes.

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2 Overview
2.1 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.
Model
Figure 2-1 shows a model number of the SUN2000, using SUN2000-33KTL-Aas an
example.
Figure 2-1 Model number description
Table 2-1shows the rated output power and voltage.
Table 2-1 SUN2000 models and corresponding rated outputpower and voltage
Model
Rated Output Power
Rated Output Voltage
SUN2000-29.9KTL
29.9 kW
400 V
SUN2000-33KTL-A
30 kW
400 V
SUN2000-36KTL
36 kW
380 V/400 V/480 V
SUN2000-42KTL
42 kW
480 V

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Network Application
The SUN2000 applies to grid-tied PV power systems for commercial rooftops and large
power stations. Typically, a grid-tied PV power system consists of PV strings, grid-tied
inverters, AC distribution units (ACDUs), and isolation transformer, as shown in Figure 2-2.
Figure 2-2 Network application
(A) PV string
(B) SUN2000
(C) ACDU
(D) Isolation transformer
(E) Power grid
Supported Power Grids
The SUN2000-29.9KTL/33KTL-A/36KTL supports the following power grid modes: TN-S,
TN-C, TN-C-S, TT, and IT. The SUN2000-42KTL supports only IT grid mode.
Figure 2-3 Power grid modes

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2.2 Appearance
SUN2000 Dimensions
Figure 2-4 shows the SUN2000 dimensions.
Figure 2-4 SUN2000 dimensions (including the mounting plate)
Front View
Figure 2-5 shows the SUN2000 front view.

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Figure 2-5 SUN2000 front view
(1) Maintenance compartment door
(2) LED indicator
(3) Host panel
Table 2-2 describes the LED indicators.
Table 2-2 LED indicator description (from left to right)
Indicator
Status
Meaning
PV connection
indicator
Green on
At least one PV string is
properly connected, and
the DC input voltage of
the corresponding MPPT
circuit is higher than or
equal to 200 V.
Green off
The SUN2000
disconnects from all PV
strings, or the DC input
voltage of each MPPT
circuit is less than 200 V.
Grid-tied indicator
Green on
The SUN2000 connects
to the power grid.
Green off
The SUN2000 does not
connect to the power grid.
Communications
indicator
Blinking green at short intervals (on for
0.5s and then off for 0.5s)
The SUN2000 receives
communications data
normally.
Green off
The SUN2000 receives
no communications data
for 10s.

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Indicator
Status
Meaning
Alarm/Maintenanc
e indicator
Alarm status
Blinking red at long
intervals (on for 1s
and then off for 4s)
A warning alarm is
generated.
Blinking red at short
intervals (on for 0.5s
and then off for 0.5s)
A minor alarm is
generated.
Steady red
A major alarm is
generated.
Local
maintenance
status
Blinking green at
long intervals (on for
1s and then off for
1s)
Local maintenance is in
progress.
Blinking green at
short intervals (on
for 0.125s and then
off for 0.125s)
Local maintenance fails.
Steady green
Local maintenance
succeeds.
Local maintenance refers to operations performed after a USB flash drive, a WLAN module, a
Bluetooth module, or a USB data cable is inserted into the USB port of the solar inverter. For
example, local maintenance includes data import and export using a USB flash drive, and connecting
to the SUN2000 app over a WLAN module, a Bluetooth module, or a USB data cable.
If the alarming and the local maintenance happen concurrently, the alarm/maintenance indicator
shows the local maintenance state first. After the USB flash drive, WLAN module, Bluetooth
module, or USB data cable is removed, the indicator shows the alarm state.
SUN2000 Rear View
Figure 2-6 shows the SUN2000 rear view.

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Figure 2-6 SUN2000 rear view
(1) Heat sink
(2) Mounting plate
SUN2000 bottom view
Figure 2-7 shows the SUN2000 bottom view.
Figure 2-7 SUN2000 bottom view
No.
Component
Silk Screen
1
Waterproof cable connector (inner
diameter: 18–44 mm)
AC OUTPUT 1
2
Waterproof cable connector (inner
diameter: 24–32 mm)
AC OUTPUT 2
3
USB port
USB
4
DC switch 1
DC SWITCH 1
5
DC switch 2
DC SWITCH 2

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No.
Component
Silk Screen
6
Waterproof cable connectors (inner
diameter: 14–18 mm)
COM1, COM2, COM3
7
DC input terminals (controlled by
DC SWITCH 1)
+/–
8
DC input terminals (controlled by
DC SWITCH 2)
+/–
Waterproof cable connector is abbreviated as waterproof connector in the following text.
Use the USB port only during maintenance (such as power-on setting, upgrade, and data export).
Ensure that the USB cover is tightened when the USB port is not in use.
2.3 Label Description
Symbols
Table 2-3 describes the labels on the SUN2000 enclosure and their meanings.
Table 2-3 Label description
Symbol
Name
Meaning
Running warning
Potential hazards exist
after the SUN2000 is
powered on. Take
protective measures when
operating the SUN2000.
Burn warning
Do not touch a running
SUN2000 because it
generates high
temperatures on the shell.
Delay 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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Symbol
Name
Meaning
Refer to documentation
Remind operators to refer
to the documents shipped
with the SUN2000.
Grounding
Indicates the position for
connecting the protection
ground cable.
Operation warning
Do not remove the DC
input connector when the
SUN2000 is running.
SUN2000 serial number
label
Indicates the SUN2000
serial number.
Nameplate
The SUN2000 is labeled with a nameplate on the side that contains the model information,
technical specifications, and compliance symbols, as shown in Figure 2-8.
Figure 2-8 Nameplate of the SUN2000-42KTL
(1) Trademark and product model
(2) Important technical specifications

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(3) Compliance symbols
(4) Company name and country of manufacture
The nameplate figure is for reference only. The actual nameplate prevails.
2.4 Working Principle
Conceptual Diagram
The SUN2000 receives inputs from eight PV strings. Then the inputs are grouped into four
MPPT routes inside the SUN2000 to track the maximum power point of the PV strings. The
DC power is then converted into three-phase AC power through an inverter circuit. Surge
protection is supported on both the DC and AC sides. Figure 2-9 shows the conceptual
diagram for the SUN2000-29.9KTL/33KTL-A/36KTL. Figure 2-10 shows the conceptual
diagram for the SUN2000-42KTL.
Figure 2-9 Conceptual diagram for the SUN2000-29.9KTL/33KTL-A/36KTL

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Figure 2-10 Conceptual diagram for the SUN2000-42KTL
Working Modes
The SUN2000 can work in standby, operating, or shutdown mode. Figure 2-11 shows the
relationship between the three working modes.
Figure 2-11 SUN2000 working modes
Table 2-4 describes the three working modes shown in Figure 2-11.