Huawei SUN2000-30KTL-US User manual

SUN2000-(25KTL, 30KTL)-US
User Manual
Issue
09
Date
2019-06-30
HUAWEI TECHNOLOGIES CO., LTD.

Issue 09 (2019-06-30)
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

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User Manual
About This Document
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About This Document
Purpose
This document describes the Grid Support SUN2000-25KTL/30KTL-US (SUN2000 for short)
in terms of its installation, cable connections, commissioning, maintenance, and
troubleshooting. Get familiar with the SUN2000 features and functions and safety precautions
provided in this document before installing and operating the SUN2000.
The figures provided in this document are for reference only. The actual product appearance
prevails.
This document is subject to update and revision. The latest version can be downloaded from
http://e.huawei.com.
Intended Audience
This document is intended for photovoltaic (PV) power station 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 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.

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User Manual
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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, and environment
deterioration.
Change History
Changes between document issues are cumulative. Therefore, the latest document issue
contains all updates made in previous issues.
Issue 09 (2019-06-30)
Updated 2.3 Label Conventions.
Updated 4.2 Tools.
Updated 5 Electrical Connections.
Issue 08 (2019-01-10)
Updated 7.2 Operations with the SUN2000 App.
Issue 07 (2018-07-10)
Updated 2.1 Introduction.
Updated 5.5 Connecting DC Input Power Cables.
Updated 8.2 Troubleshooting.
Issue 06 (2018-05-20)
Updated 5.5 Connecting DC Input Power Cables.
Updated 8.1 Routine Maintenance.
Added B Contact Information.
Issue 05 (2017-11-14)
Updated 1 Safety Precautions.

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Issue 04 (2017-07-30)
Updated 5.3 Connecting the Ground Cable.
Updated 10 Technical Specifications.
Issue 03 (2017-04-01)
Updated 10 Technical Specifications.
Issue 02 (2017-02-20)
Updated Installation Environment Requirements of 4.3 Wall-mounting the SUN2000.
Updated Installation Environment Requirements of 4.4 Installing a Common Support.
Updated Installation Environment Requirements of 4.5 Installing a Tilted Support.
Updated 8.1 Routine Maintenance.
Issue 01 (2016-11-10)
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 Conventions..............................................................................................................................................................10
2.4 Working Process .................................................................................................................................................................15
3 SUN2000 Storage ................................................................................................................. 17
4 Installation ........................................................................................................................... 18
4.1 Checking Before Installation..............................................................................................................................................18
4.2 Tools.....................................................................................................................................................................................19
4.3 Wall-mounting the SUN2000.............................................................................................................................................23
4.3.1 Determining the Installation Position.............................................................................................................................23
4.3.2 Moving the SUN2000......................................................................................................................................................27
4.3.3 Installing a Rear Panel.....................................................................................................................................................28
4.3.4 Installing the SUN2000...................................................................................................................................................31
4.4 Installing a Common Support............................................................................................................................................35
4.4.1 Determining the Installation Position.............................................................................................................................35
4.4.2 Moving the SUN2000......................................................................................................................................................37
4.4.3 Installing a Rear Panel.....................................................................................................................................................37
4.4.4 Installing the SUN2000...................................................................................................................................................39
4.5 Installing a Tilted Support..................................................................................................................................................40
4.5.1 Determining the Installation Position.............................................................................................................................40
4.5.2 Moving the SUN2000......................................................................................................................................................41
4.5.3 Installing the SUN2000...................................................................................................................................................42
5 Electrical Connections......................................................................................................... 48
5.1 Common Cable Connection Operations............................................................................................................................48
5.2 Opening the Maintenance Compartment Door.................................................................................................................49
5.3 Connecting the Ground Cable............................................................................................................................................51
5.4 Installing the AC Output Power Cable..............................................................................................................................54
5.5 Connecting DC Input Power Cables..................................................................................................................................61

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5.6 Connecting Communications Cables.................................................................................................................................68
5.6.1 Communication Mode Description ................................................................................................................................68
5.6.2 Selecting a Communication Mode .................................................................................................................................69
5.6.3 Connecting the RS485 Communications Cable.............................................................................................................70
5.7 Verifying the Installation....................................................................................................................................................77
5.8 Closing the Maintenance Compartment Door ..................................................................................................................77
6 System Operation................................................................................................................ 80
6.1 Powering On the SUN2000................................................................................................................................................80
6.2 Powering Off the SUN2000...............................................................................................................................................80
7 Man-Machine Interactions ................................................................................................. 82
7.1 Operations with a USB Flash Drive ..................................................................................................................................82
7.1.1 Exporting Configurations................................................................................................................................................82
7.1.2 Importing Configurations................................................................................................................................................84
7.1.3 Exporting Data.................................................................................................................................................................85
7.1.4 Upgrading.........................................................................................................................................................................85
7.2 Operations with the SUN2000 App...................................................................................................................................87
7.2.1 Operations Related to the Advanced User .....................................................................................................................87
7.2.1.1 Setting Grid Parameters ...............................................................................................................................................87
7.2.1.2 Setting Protection Parameters......................................................................................................................................88
7.2.1.3 Setting Feature Parameters...........................................................................................................................................89
7.2.2 Operations Related to the Special User..........................................................................................................................92
7.2.2.1 Setting Grid Parameters ...............................................................................................................................................92
7.2.2.2 Setting Protection Parameters......................................................................................................................................94
7.2.2.3 Setting Feature Parameters...........................................................................................................................................96
7.2.2.4 Setting Power Adjustment Parameters........................................................................................................................98
8 Maintenance....................................................................................................................... 101
8.1 Routine Maintenance........................................................................................................................................................101
8.2 Troubleshooting ................................................................................................................................................................102
9 SUN2000 Handling............................................................................................................ 109
9.1 Removing the SUN2000 ..................................................................................................................................................109
9.2 SUN2000 Packing.............................................................................................................................................................109
9.3 SUN2000 Disposal...........................................................................................................................................................110
10 Technical Specifications ................................................................................................. 111
A Power Grid Codes............................................................................................................. 115
B Contact Information ......................................................................................................... 116
C FCC Supplier's Declaration of Conformity (SDoC) ...................................................... 117
D Acronyms and Abbreviations ......................................................................................... 118

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1 Safety Precautions
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1 Safety Precautions
Strictly follow all the safety precautions in this document to prevent personal injury or death.
Important Safety Instructions
Save These Instructions: This manual contains important instructions for the
SUN2000-25KTL/30KTL-US that shall be followed during installation and maintenance of
the SUN2000.
Personnel Requirements
Only qualified and trained electrical technicians are allowed to install and operate the
SUN2000.
Operators should understand the components and functioning of a grid-tied PV power
system, and they should be familiar with relevant local standards.
Label Protection
Do not tamper with any warning signs on the SUN2000 enclosure because these signs
contain important information about safe operation.
Do not remove or damage the nameplate on the SUN2000 enclosure because it contains
important product information.
Installation
Read this document before installation. Huawei shall not be liable for any consequence
caused by violation of the regulations specified in this document.
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 200 mm (7.87 in.) of both sides of the SUN2000,
and no objects within 500 mm (19.69 in.), 600 mm (23.62 in.), and 1000 mm (39.37 in.)
of the top, bottom, and front, respectively. This is to allow sufficient space for
installation and heat dissipation.

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Install the SUN2000 in an environment with good ventilation to ensure efficient and
long-term system performance.
Ensure that the SUN2000 heat sinks are free from blockage.
Open the maintenance compartment door in the lower part of the enclosure before
installation and cable connections. Do not perform any operation on other components
inside the enclosure except connecting AC power cables and communications cables.
When installing devices or connecting cables, use appropriate tools and take necessary
protective measures to avoid damaging devices.
Cable Connection
Before connecting cables to the SUN2000, ensure that the SUN2000 is securely positioned
and not damaged in any way. Otherwise, electrical shock or fire may occur.
Shield the PV modules with opaque cloth before connecting cables to the SUN2000.
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 to the solar power system are properly connected and insulated
and meet specifications.
Operation
High voltages may cause electrical shocks and serious injuries during SUN2000 operation.
Strictly comply with the safety precautions in this document and associated documents to
operate the SUN2000.
Do not touch parts of the SUN2000 because the heat sinks are extremely hot when the
SUN2000 is in operation and touching these parts can cause severe burns and personal
injury.
Follow local laws and regulations when operating the SUN2000.
Maintenance and Replacement
Before performing maintenance tasks, power off the SUN2000 by referring to 6.2
Powering Off the SUN2000. Then wait for at least 5 minutes before performing
operations on the SUN2000.
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
restarting the SUN2000.
Maintain the SUN2000 with sufficient knowledge of this document and proper tools and
testing equipment.
Observe ESD precautions during maintenance.

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For personal safety, wear insulation gloves and protective shoes.

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2 Overview
2.1 Introduction
This section describes the functions, models, and network application of the SUN2000.
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.
Models
Figure 2-1 shows a model number of the SUN2000, using SUN2000-25KTL-US as an
example.
Figure 2-1 Model number description
Table 2-1 lists all models of the SUN2000 and their rated output power.
Table 2-1 SUN2000 models and rated output power
Model
Rated Output Power
SUN2000-25KTL-US
25 kW
SUN2000-30KTL-US
30 kW

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Network Application
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
Power Grid Earthing Systems
Figure 2-3 shows the 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
This section describes the appearance and specifications of the SUN2000.
Dimensions
Figure 2-4 shows the SUN2000 dimensions.
Figure 2-4 Dimensions
SUN2000 front view
Figure 2-5 shows the SUN2000 front view.

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Figure 2-5 SUN2000 front view
(1) Indicators
(2) Host panel
(3) Maintenance compartment door
Table 2-2 describes the indicators.
Table 2-2 Description of indicators from left to right
Indicator
Status
Meaning
PV connection
indicator
Steady green
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.
Off
The SUN2000
disconnects from all PV
strings, or the DC input
voltage of each MPPT
circuit is less than 200 V.
Grid-tie indicator
Steady green
The SUN2000 is
grid-tied.
Off
The SUN2000 is not
grid-tied.
Communication
indicator
Blinking green (on for 0.5s and off for
0.5s)
The SUN2000 receives
communications data
normally.

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Indicator
Status
Meaning
Off
The SUN2000 receives
no communications data
for 10s.
Alarm/Maintenanc
e indicator
Alarm state
Blinking red slowly
(on for 1s and then
off for 4s)
The SUN2000 has
generated a warning.
Blinking red fast (on
for 0.5s and then off
for 0.5s)
The SUN2000 has
generated a minor alarm.
Steady red
The SUN2000 has
generated a major alarm.
Local
maintenance
state
Blinking green
slowly (on for 1s and
then off for 1s)
Local maintenance is in
progress.
Blinking green fast
(on for 0.125s and
off for 0.125s)
Local maintenance has
failed.
Steady green
Local maintenance is
successful.
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 maintenancehappen 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.
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 bracket
SUN2000 bottom view
Figure 2-7 shows the SUN2000 bottom view.
Figure 2-7 SUN2000 bottom view
No.
Component Name (Silk Screen)
Description
1
DC switch (DC SWITCH)
N/A
2
Positive DC input terminal (+)
Six routes

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No.
Component Name (Silk Screen)
Description
3
Function ground points
N/A
4
Waterproof cable connector
(COM1)
N/A
5
Protection ground points
N/A
6
AC output port (AC OUTPUT)
N/A
7
Waterproof cable connector
(COM3)
Reserved
8
Waterproof cable connector
(COM2)
N/A
9
Waterproof cable connector (GND)
Functional ground cable hole
10
USB port (USB)
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.
11
Negative DC input terminal (–)
Six routes
12
Vent valve
2 PCS
2.3 Label Conventions
Warning Signs
Warning signs are available on the SUN2000 side, as described in Table 2-3.

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Table 2-3 Warning signs
Symbol
Label
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
Hot surfaces. To reduce the risk of
burns do not touch heatsink nor the
sides of the SUN2000.
Delay discharge
Risk of electric shock from
energy stored in capacitors.
Wait 5 minutes after
disconnecting all sources of
power to remove cover.
Transformerless
inverter
Transformerless inverter.
Symbols
Table 2-4 describes the labels on the SUN2000 chassis.

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Table 2-4 Symbols
Symbol
Label
Meaning
Refer to documentation
Remind operators to refer to
the documentation shipped
with the SUN2000.
Protection ground label
Indicates the position for
connecting the protection
ground cable.
Equipotential grounding
label
Indicates the position for
connecting the PV module
ground cable and the RS485
communications cable
shield layer.
Operation warning
The DC input connector
must not be removed when
the SUN2000 is in
operation.
SUN2000 SN label
Indicates the SN
information.
Nameplate
The SUN2000 is labeled with a nameplate on the side that contains the model information,
technical specifications, and compliance symbols. If the SUN2000 only uses RS485 for
communication, the value of Communication on the nameplate is RS485, as shown in Figure
2-8. If the SUN2000 uses PLC (MBUS) and RS485 for communication, the value of
Communication on the nameplate is PLC, as shown in Figure 2-9. (SUN2000-25KTL-US is
used as an example.)

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Figure 2-8 Nameplate (RS485 communication)
(1) Trademark, product name, and model
number
(2) Important technical specifications
(3) Compliance symbols
(4) Company name and country of
manufacture