Huawei SUN2000-33KTL-US User manual

SUN2000-(33KTL, 36KTL, 40KTL)-US
User Manual
Issue
07
Date
2019-06-20
HUAWEI TECHNOLOGIES CO., LTD.

Issue 07 (2019-06-20)
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:
http://e.huawei.com

SUN2000-(33KTL, 36KTL, 40KTL)-US
User Manual
About This Document
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About This Document
Purpose
This document describes the SUN2000-33KTL-US/36KTL-US/40KTL-US (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 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.
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

SUN2000-(33KTL, 36KTL, 40KTL)-US
User Manual
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Symbol
Description
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 07 (2019-06-20)
Updated 6.2 Powering On the SUN2000.
Issue 06 (2018-07-12)
Changed Power Grid Types in 2.1 Product Overview to Power Grid Earthing Systems.
Updated 8.2 Troubleshooting.
Issue 05 (2018-05-06)
Updated 5.4 ConnectingAC Output Power Cables.
Added the description about the metal stamping forming contact in 5.5 Connecting DC Input
Power Cables.
Updated 8.1 Routine Maintenance.
Added B Contact Information.
Issue 04 (2017-11-06)
Updated 5.4 ConnectingAC Output Power Cables.
Issue 03 (2017-07-15)
Updated 5.2.1 Grounding the SUN2000 over a PE Point.
Updated 10 Technical Specifications.

SUN2000-(33KTL, 36KTL, 40KTL)-US
User Manual
About This Document
Issue 07 (2019-06-20)
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Issue 02 (2017-06-09)
Added the description of supplying the mounting bracket separately to 4.5 Installing the
Mounting Bracket.
Added the description of preparing MC4 DC terminals to 5.5 Connecting DC Input Power
Cables.
Issue 01 (2017-04-01)
This issue is the first official release.

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User Manual
Contents
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Contents
About This Document.................................................................................................................... ii
1 Safety Precautions.........................................................................................................................1
2 Overview.........................................................................................................................................4
2.1 Product Overview.........................................................................................................................................................4
2.2 Appearance ...................................................................................................................................................................6
2.3 Label Description........................................................................................................................................................10
2.4 Working Principle.......................................................................................................................................................13
3 SUN2000 Storage.........................................................................................................................16
4 System Installation .....................................................................................................................17
4.1 Checking Before Installation ......................................................................................................................................17
4.2 Tools ...........................................................................................................................................................................18
4.3 Determining the Installation Position .........................................................................................................................22
4.4 Moving the Inverter....................................................................................................................................................27
4.5 Installing the Mounting Bracket .................................................................................................................................28
4.5.1 Wall-mounted Installation........................................................................................................................................29
4.5.2 Common Support-mounted Installation...................................................................................................................31
4.5.3 Tilted Support-mounted Installation ........................................................................................................................33
4.6 Installing the SUN2000 ..............................................................................................................................................34
4.7 (Optional) Installing the DC Protection Shroud .........................................................................................................37
5 Connecting Cables ......................................................................................................................40
5.1 Preparing OT Terminals..............................................................................................................................................40
5.2 Connecting the Ground Cable.....................................................................................................................................41
5.2.1 Grounding the SUN2000 over a PE Point ...............................................................................................................42
5.2.2 PV Side Grounding..................................................................................................................................................43
5.3 Opening the Maintenance Compartment Door ...........................................................................................................44
5.4 Connecting AC Output Power Cables.........................................................................................................................46
5.4.1 Connection Through a Pipe .....................................................................................................................................46
5.4.2 Common Connection...............................................................................................................................................54
5.5 Connecting DC Input Power Cables...........................................................................................................................61
5.6 Connecting Communications Cables..........................................................................................................................71
5.6.1 Communication Mode Description..........................................................................................................................71

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5.6.2 Selecting a Mode for Connecting RS485 Communications Cables.........................................................................72
5.6.3 Connecting RS485 Communications Cables Through a Pipe..................................................................................75
5.6.4 Connecting the RS485 Communications Cable in a Common Way ........................................................................79
5.7 Closing the Maintenance Compartment Door ............................................................................................................84
6 System Commissioning .............................................................................................................87
6.1 Checking Before Power-On........................................................................................................................................87
6.2 Powering On the SUN2000 ........................................................................................................................................87
6.3 Powering Off the SUN2000........................................................................................................................................93
7 Man-Machine Interactions ........................................................................................................95
7.1 Operations with a USB Flash Drive............................................................................................................................95
7.1.1 Exporting Configurations ........................................................................................................................................95
7.1.2 Importing Configurations ........................................................................................................................................97
7.1.3 Exporting Data.........................................................................................................................................................98
7.1.4 Upgrading................................................................................................................................................................98
7.2 Operations with a SmartLogger................................................................................................................................100
7.3 Operations with the NMS .........................................................................................................................................100
7.4 Operations with the SUN2000 APP..........................................................................................................................100
8 Maintenance...............................................................................................................................101
8.1 Routine Maintenance................................................................................................................................................101
8.2 Troubleshooting........................................................................................................................................................102
9 Handling the SUN2000 ............................................................................................................110
9.1 Removing the SUN2000........................................................................................................................................... 110
9.2 Packing the SUN2000...............................................................................................................................................110
9.3 Disposing of the SUN2000....................................................................................................................................... 110
10 Technical Specifications ........................................................................................................111
A Grid Codes.................................................................................................................................115
B Contact Information.................................................................................................................116
C Acronyms and Abbreviations................................................................................................117

SUN2000-(33KTL, 36KTL, 40KTL)-US
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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.
Declare
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
Important Safety Instructions
Save These Instructions: This manual contains important instructions for the
SUN2000-33KTL-US/36KTL-US/40KTL-US that shall be followed during installation and
maintenance of the SUN2000.
Caution: Changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment.
Personnel Requirements
Only qualified electrical technicians 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.

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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.
Sign Protection
Do not tamper with any warning signs on the SUN2000 chassis because these signs
contain important information about safe operation.
Do not tamper with the nameplate on the SUN2000 chassis because it contains important
product information.
Installation
Ensure that the SUN2000 is not connected to a power supply and is not powered on
before starting installation.
Ensure that there are no objects within 300 mm (11.81 in.), 200 mm (7.87 in.), 500 mm
(19.69 in.), 600 mm (23.62 in.), and 1000 mm (39.37 in.) of the left, right, top, bottom,
and front of the SUN2000, respectively. This is to allow sufficient space for installation
and heat dissipation. For ease of installation, ensure that the SUN2000 bottom is at most
730 mm (28.74 in.) from the ground. If you have any questions about the distance,
consult the local technical support engineers.
Ensure that the SUN2000 is installed in a well ventilated environment.
Ensure that the SUN2000 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 connectingAC
power cables and communications cables.
Cable Connections
Before connecting cables, ensure that the SUN2000 is securely positioned 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 power supply department before using the SUN2000 to
generate electricity in grid-tied mode.
Ensure that the cables used in a grid-tied PV power system are properly connected and
insulated and meet specifications.
Operation
High voltages may cause electric shocks and serious injuries during SUN2000 operating.
Strictly comply with the safety precautions in this document and associated documents when
operating the SUN2000.

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Do not touch an operating SUN2000 because the heat sinks may have a temperature over
60°C (140°F) and may cause burns when the SUN2000 is operating.
Follow local laws and regulations when operating the equipment.
Maintenance and Replacement
High voltages may cause electric shocks and serious injuries during SUN2000 operating.
Therefore, before maintenance, power off the SUN2000 and strictly comply with the safety
precautions in this document and associated documents to operate the SUN2000.
Maintain the SUN2000 with sufficient knowledge of this document and proper tools and
testing equipment.
Before performing maintenance tasks, power off the SUN2000 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 SUN2000 security performance before
powering on the SUN2000 again.
Observe ESD precautions during the maintenance.
For personal safety, wear insulation gloves and protective shoes.

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2 Overview
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2 Overview
2.1 Product Overview
Function
The SUN2000 is a three-phase grid-tied PV string inverter that converts the DC power
generated by PV strings intoAC power and feeds the power into the power grid.
Model
Figure 2-1 describes the model number of the SUN2000-33KTL-US.
Figure 2-1 Model number description
Table 2-1 describes the rated output power and voltage of all models of SUN2000s.
Table 2-1 SUN2000 models and corresponding rated output power and voltage
Model
Rated Output Power
Rated Output Voltage
SUN2000-33KTL-US
33.3 kW
480 V
SUN2000-36KTL-US
36 kW
480 V
SUN2000-40KTL-US
40 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 power distribution units, and isolation transformers.
Figure 2-2 Network application
(A) PV string
(B) SUN2000
(C) ACDU
(D) Isolation transformer
(E) Power grid
Power Grid Earthing Systems
The following figure shows the power grid earthing systems supported by the SUN2000.
Figure 2-3 Power Grid Earthing System
The SUN2000 can be installed in common transformer secondary winding configuration such as neutral
grounded Y, neutral ungrounded Y, delta (floating). For any other transformer configuration, please
contact Huawei.

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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
Description
Silk Screen
1
3/4-inch waterproof
cable connector
Inner diameter: 14–18
mm (0.55–0.71 in.)
COM1, COM2, COM3
2
2-inch waterproof cable
connector
Inner diameter: 37–44
mm (1.46–1.73 in.)
AC OUTPUT
3
USB port
N/A
USB
4
DC switch 1
N/A
DC SWITCH 1
5
DC switch 2
N/A
DC SWITCH 2

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No.
Component
Description
Silk Screen
6
1/2-inch waterproof
cable connector
Inner diameter: 6–12
mm (0.24–0.47 in.)
RESERVE
7
DC input terminal
Controlled by DC
SWITCH 1
+/–
8
DC input terminal
Controlled by DC
SWITCH 2
+/–
9
PV side ground point
N/A
GND
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
Warning Signs
Warning signs are available on the SUN2000 side, as described in Table 2-3.
Table 2-3 Warning signs
Symbol
Name
Meaning
Electric shock
Lethal voltages 1000 V DC. Keep out.
No user serviceable parts inside. Only trained
service personnel are allowed access.
Both AC and DC voltage sources are
terminated inside this equipment. Each circuit
must be disconnected before servicing.
When the photovoltaic array is exposed to light,
it supplies DC voltage to this equipment.
The DC conductors of this photovoltaic system
are ungrounded and may be energized.
The DC conductors of this photovoltaic system
are normally ungrounded but will become
intermittently grounded without indication
when the SUN2000 measures the PV array
isolation.
Burn warning
Do not touch a running SUN2000 because it
generates high temperatures on the shell.

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Symbol
Name
Meaning
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.
Transformerless
inverter
The SUN2000 output does not pass through an
isolation transformer.
Symbols
Table 2-4 describes the labels on the SUN2000 chassis and their meanings.
Table 2-4 Label description
Symbol
Name
Meaning
PE point
Indicates the position for
connecting the PE 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.

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Figure 2-8 Nameplate of the SUN2000-33KTL-US
(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. The actual nameplate prevails.
Table 2-5 describes the compliance symbols.
Table 2-5 Compliance symbols
Symbol
Name
Meaning
American FCC Part 15B
certification
The SUN2000 complies
with FCC Part 15B
certification standards.
American FCC Part 15G
certification
The SUN2000 complies
with FCC Part 15G
certification standards.
Canadian IC certification
The SUN2000 complies
with ICES certification
standards.

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Symbol
Name
Meaning
CSA certification of
America and Canada
The SUN2000 complies
with CSA certification
standards.
EFUP label
The SUN2000 does not
pollute the environment
during the specified
period.
WEEE label
Do not dispose of the
SUN2000 as household
garbage.
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-phaseAC power through an inverter circuit. Surge
protection is supported on both the DC andAC sides. Figure 2-9 shows the SUN2000
conceptual diagram.
Figure 2-9 SUN2000 conceptual diagram