Huawei SUN2000 Series User manual

SUN2000-(90KTL-100KTL) Series
User Manual
Date
2017-12-15
HUAWEI TECHNOLOGIES CO., LTD.

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Copyright © Huawei Technologies Co., Ltd.
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Copyright © Huawei Technologies Co., Ltd. 2017. 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://www.huawei.com
Email:
[email protected]

SUN2000-(90KTL-100KTL) Series
User Manual
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About This Document
Purpose
This document describes the SUN2000-90KTL-H0, SUN2000-90KTL-H1,
SUN2000-95KTL- INH0 and SUN2000-100KTL-H1 (SUN2000 for short) in terms of its
installation, electrical connections, commissioning, maintenance, and troubleshooting. Before
installing and operating the SUN2000, ensure that you are familiar with the features, functions,
and safety precautions provided in this document.
The text and figures reflect the current technical state at the time of printing. Subject to
technical changes. Errors and omissions excepted. Huawei assumes no liability for mistakes
or printing errors.
Intended Audience
This document is intended for photovoltaic (PV) plant personnel and 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.
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

SUN2000-(90KTL-100KTL) Series
User Manual
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Symbol
Description
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. The latest document issue contains all
updates made in previous issues.
Issue Draft A (2017-10-25)
This issue is used for first office application (FOA).

SUN2000-(90KTL-100KTL) Series
User Manual
Contents
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Contents
About This Document.................................................................................................................... ii
1 Safety Precautions.........................................................................................................................1
2 Overview.........................................................................................................................................4
2.1 Introduction ..................................................................................................................................................................4
2.2 Appearance ...................................................................................................................................................................5
2.3 Label Description..........................................................................................................................................................8
2.4 Working Principles........................................................................................................................................................9
2.4.1 Conceptual Diagram ..................................................................................................................................................9
2.4.2 Working Modes........................................................................................................................................................10
3 Storage...........................................................................................................................................12
4 Installation....................................................................................................................................13
4.1 Checking Before Installation ......................................................................................................................................13
4.2 Tools ...........................................................................................................................................................................14
4.3 Determining the Installation Position .........................................................................................................................15
4.3.1 Environment Requirements .....................................................................................................................................15
4.3.2 Space Requirements.................................................................................................................................................16
4.4 Installing the Mounting Bracket .................................................................................................................................19
4.4.1 Support-mounted Installation ..................................................................................................................................19
4.4.2 Wall-mounted Installation........................................................................................................................................22
4.5 Installing the SUN2000 ..............................................................................................................................................24
5 Electrical Connections................................................................................................................29
5.1 Precautions..................................................................................................................................................................29
5.2 Crimping the OT Terminal..........................................................................................................................................29
5.3 Opening the Maintenance Compartment Door ...........................................................................................................31
5.4 Installing the AC Output Power Cable........................................................................................................................33
5.5 Connecting DC input power cables ............................................................................................................................40
5.6 Installing the Communications Cable.........................................................................................................................45
5.6.1 Communication Mode Description..........................................................................................................................45
5.6.2 Installing the RS485 Communications Cable ..........................................................................................................46
5.6.2.1 Terminal Block Connection ..................................................................................................................................47
5.6.2.2 Connecting Cables to the RJ45 Network Port ......................................................................................................50

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5.6.3 (Optional) Installing the Solar Tracker Power Cable...............................................................................................53
5.7 Closing the Maintenance Compartment Door ............................................................................................................56
6 Commissioning............................................................................................................................57
6.1 Checking Before Power-On........................................................................................................................................57
6.2 Powering On the SUN2000 ........................................................................................................................................57
6.3 Powering Off the System............................................................................................................................................63
7 Man-Machine Interactions ........................................................................................................65
7.1 Operations with a USB Flash Drive............................................................................................................................65
7.1.1 Exporting Configurations ........................................................................................................................................65
7.1.2 Importing Configurations ........................................................................................................................................67
7.1.3 Exporting Data.........................................................................................................................................................68
7.1.4 Upgrading................................................................................................................................................................69
8 Maintenance.................................................................................................................................71
8.1 Routine Maintenance..................................................................................................................................................71
8.2 Troubleshooting..........................................................................................................................................................72
9 Handling the Inverter.................................................................................................................78
9.1 Removing the SUN2000.............................................................................................................................................78
9.2 Packing the SUN2000.................................................................................................................................................78
9.3 Disposing of the SUN2000.........................................................................................................................................78
10 Technical Specifications ..........................................................................................................79
A Acronyms and Abbreviations..................................................................................................83

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1 Safety Precautions
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1 Safety Precautions
General Safety
Before performing operations, read through this manual and follow all the precautions to
prevent accidents. The "DANGER", "WARNING", "CAUTION", and "NOTICE" marks
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. 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 damage
Violation of the storage requirements specified in this document
Incorrect storage, installation, or use
Installation or use by unqualified personnel
Failure to obey 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)
The warranty expires and the warranty service is not extended.

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Installation or use in environments which are not specified in related international
standards
Personnel Requirements
Only certified electricians are allowed to install, connect cables for, commission, maintain,
troubleshoot, and replace the SUN2000. Operation personnel must meet the following
requirements:
Receive professional training.
Read through this document and follow all the precautions.
Be familiar with the safety specifications about the electrical system.
Understand the components and functioning of a grid-tied PV system, and be familiar
with relevant local standards.
Wear proper personal protective equipment (PPE) during any operation on the SUN2000.
Protect Labels
Do not scrawl, damage, or block the labels on the SUN2000 enclosure.
Do not scrawl, damage, or block the nameplate on the side of the SUN2000 enclosure.
Installation
Never work under power 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.
Never open the host panel cover of the SUN2000.
Never remove the terminals and cable glands at the bottom of the SUN2000.
Electrical Connections
Before connecting cables to the SUN2000, ensure that the SUN2000 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 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 injury, death or serious
property damage from the SUN2000 in operation. Strictly comply with the safety precautions
in this document and associated documents to operate the SUN2000.
Do not touch an energized SUN2000 because the heat sink has a high temperature.
Follow local laws and regulations when operating the SUN2000.
Maintenance and Replacement
High voltage may cause an electric shock, which results in serious injury, 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 to operate the SUN2000.
Maintain the SUN2000 with sufficient knowledge of this document, proper tools, and
testing equipment.
Before performing maintenance tasks, power off the SUN2000 and wait at least 15
minutes.
Temporary warning labels or fences must be placed to prevent unauthorized people
entering the site.
Rectify any faults that may compromise the SUN2000 security performance before
powering on the SUN2000 again.
Observe ESD precautions during maintenance.

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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 to the power grid.
Models
Model
Rated Output Power
Rated Output Voltage
SUN2000-90KTL-H0
90 kW
800 V
SUN2000-90KTL-H1
90 kW
800 V
SUN2000-95KTL-INH0
90 kW
800 V
SUN2000-100KTL-H1
100 kW
800 V
Networking Application
The SUN2000 applies to grid-tied PV systems for commercial rooftops and large PV plants.
Typically, a grid-tied PV system consists of the PV string, SUN2000, alternating current
distribution unit (ACDU), and step-up transformer.
Figure 2-1 Network diagram
(A) PV string
(B) SUN2000
(C) ACDU
(D) Step-up transformer
(E) Power grid

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Supported Power Grid
The SUN2000 only supports the IT power grid mode.
Figure 2-2 Supported power grid
2.2 Appearance
Dimensions

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Front View
(1) Maintenance compartment door
(2) LED
(3) Host panel cover
LED
Status
Meaning
PV connection LED
PV string
connectio
n status
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 600 V.
Off
The SUN2000 disconnects
from all PV strings, or the DC
input voltage of each MPPT
circuit is less than 600 V.
Grid-tied LED
Steady green
The SUN2000 is exporting
power to the power grid.
Off
The SUN2000 is not exporting
power to the power grid.
Communication LED
Blinking green
The SUN2000 receives data
over RS485 or PLC
communication.
Off
The SUN2000 has not
received data over RS485 or
PLC communication for 10
seconds.
Alarm/Maintenance
LED
Alarm
status
Blinking red at
long intervals (on
for 1s and then
off for 4s)
The SUN2000 is generating a
warning alarm.
Blinking red at
short intervals (on
for 0.5s and then
The SUN2000 is generating a
minor alarm.

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LED
Status
Meaning
off for 0.5s)
Steady red
The SUN2000 is generating a
major alarm.
Local
maintenan
ce 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 is
successful.
Local maintenance refers to operations performed after a USB flash drive, Bluetooth module, or
USB data cable is inserted into the USB port of the SUN2000. For example, local maintenance
includes data import and export using a USB flash drive, and maintenance operations on the
SUN2000 app installed on a device connected to the SUN2000 by a Bluetooth module or USB data
cable.
If an alarm occurs during local maintenance, the Alarm/Maintenance LED shows the local
maintenance status first. After the USB flash drive, Bluetooth module, or USB data cable is removed,
the LED shows the alarm status.
Bottom View
No
.
Component
Silk Screen
Description
1
Cable glands
COM1, COM2, and
COM3
Inner diameter: 14–18 mm
2
USB port
USB
N/A
3
DC switch 1
DC SWITCH 1
N/A

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No
.
Component
Silk Screen
Description
4
DC input terminals
+/–
Controlled by DC SWITCH
1
5
DC input terminals
+/–
Controlled by DC SWITCH
2
6
DC switch 2
DC SWITCH 2
N/A
7
Cable gland
AC OUTPUT
Inner diameter: 30–57 mm
8
Cable gland
RESERVE
Inner diameter: 14–18 mm
2.3 Label Description
Label
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
certified electricians
are allowed to perform
operations on the
SUN2000.
Residual voltage exists
after the SUN2000 is
powered off. It takes
15 minutes for the
SUN2000 to discharge
to the safe voltage.
Refer to documentation
Reminds operators to
refer to the documents
provided with the
SUN2000.

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Label
Name
Meaning
Grounding
Indicates the position for
connecting the PE cable.
Operation warning
Do not remove the DC
input connector when the
SUN2000 is running.
DC terminal operation
warning
High voltage exists after
the SUN2000 is powered
on. To avoid electric
shocks, perform the
following system
power-off operations
before plugging or
unplugging DC input
connectors of the
SUN2000:
1. Send a shutdown
command.
2. Turn off the
downstream AC
switch.
3. Turn off the two DC
switches at the bottom.
SUN2000 serial number
(SN) label
Indicates the SUN2000
SN.
Weight label
The SUN2000 needs to be
carried by four people or
using a pallet truck.
2.4 Working Principles
2.4.1 Conceptual Diagram
The SUN2000 receives inputs from 12 PV strings. Then the inputs are grouped into six 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.

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Figure 2-3 SUN2000 conceptual diagram
2.4.2 Working Modes
The SUN2000 can work in Standby, Operating, or Shutdown mode.

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Figure 2-4 SUN2000 working modes
Table 2-1 Working mode description
Working
Mode
Description
Standby
The SUN2000 enters Standby mode when the external environment does not
meet the requirements for starting the SUN2000. In Standby mode:
The SUN2000 continuously performs self-check and enters 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.
The SUN2000 enters Shutdown mode after detecting a fault or a
shutdown command, and enters Standby mode after detecting that the
PV string output power is not suitable for connecting to the power grid
and producing power.
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 when the SUN2000 needs to be stored prior to
installation:
Do not unpack the SUN2000.
Keep the proper storage temperature and humidity.
The SUN2000 should be stored in a clean and dry place and be protected from dust and
water vapor corrosion.
The number of stacked SUN2000s should meet requirements.
Regular inspection is required during the storage. Replace the packing materials when
necessary.
After long-term storage, an inspection and test conducted by qualified persons are
necessary before the SUN2000 is put into use.

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4 Installation
4.1 Checking Before Installation
Outer Packing Materials
Before unpacking the inverter, check the outer packing materials for damage, such as holes
and cracks, and check the inverter model. If any damage is found or the inverter model is not
what you requested, do not unpack the package and contact your supplier as soon as possible.
Figure 4-1 Position of the inverter model label
(1) Position of the model label
You are advised to remove the packing materials within 24 hours before installing the inverter.
Package Contents
After unpacking the inverter, check that the contents are intact and complete. If any damage is
found or any component is missing, contact your supplier.
For details about the number of contents, see the Packing List in the packing case.

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4.2 Tools
Type
Tool
Install
ation
tool
Hammer drill
Drill bit: Φ14 mm and
Φ16 mm
Socket wrench
Torque wrench
Torque screwdriver
(Phillips head: M4; flat
head: M4)
Diagonal pliers
Wire stripper
Flat-head screwdriver
Head: 0.6 mm x 3.5
mm
Rubber mallet
Utility knife
Cable cutter
Cable tie
RJ45 crimping tool
Removal wrench
Model: H4TW0005;
manufacturer:
AMPHENOL
Vacuum cleaner
Multimeter
DC voltage
measurement range ≥
1500 V DC
Marker
Measuring tape
Digital or bubble level
Hydraulic pliers
Heat shrink tubing