Sun2000 (8 ktl 28ktl) user manual 07

31186168
SUN2000 (8KTL-28KTL)
User Manual
Issue 07
Date 2014-07-30
HUAWEI TECHNOLOGIES CO., LTD.

Issue 07 (2014-07-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
i
Copyright © Huawei Technologies Co., Ltd. 2014. 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: support@huawei.com

User Manual About This Document
Issue 07 (2014-07-30) Huawei Proprietary and Confidential
ii
About This Document
Purpose
This document describes the SUN2000 in terms of its installation, electrical connections,
commissioning, maintenance, and troubleshooting. Get familiar with this document before
installing and operating the SUN2000.
This document is under continuous updates and correcting. You can download the latest
version from http://support.huawei.com.
Intended Audience
This document is intended for photovoltaic (PV) plant operators and qualified electrical
technical personnel.
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.
avoided, may result in minor or moderate injury.
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

User Manual About This Document
iii
Symbol Description
injury, equipment damage, and environment deterioration.
Change History
Changes between document issues are cumulative. The latest document issue contains all the
changes made in earlier issues.
Issue 07 (2014-07-30)
Added 4.5 Support-mounting the SUN2000.
Supplemented AC power cable specifications and models.
Modified the start time of the warranty period.
Issue 06 (2014-06-05)
Added more precautions for Installation and Maintenance and Replacement in 1 Safety
Precautions.
Added 3 Inverter Storage.
Added more maintenance items in 8.2 Daily Maintenance.
Added B Power Grid Standard Codes.
Issue 05 (2014-03-25)
Added cable types and precautions for cable connections in 5.3 Installing DC Input Power
Cables.
Modified the output power of the inverter at different temperatures in General Data in 10
Technical Specifications.
Issue 04 (2013-12-15)
Added descriptions about the SUN2000-23KTL.
Issue 03 (2013-10-11)
Added descriptions about the SUN2000-28KTL.
Issue 02 (2013-06-08)
This issue is the second official release.
Issue 01 (2013-04-26)
This issue is the first official release.

User Manual Contents
iv
Contents
About This Document.................................................................................................................... ii
1 Safety Precautions.........................................................................................................................1
2 Overview.........................................................................................................................................3
2.1 Introduction ..................................................................................................................................................................3
2.2 Appearance ...................................................................................................................................................................5
2.3 Symbol Conventions.....................................................................................................................................................8
2.4 Monitoring Panel ........................................................................................................................................................ 11
2.5 Working Principles......................................................................................................................................................14
3 Inverter Storage ...........................................................................................................................19
4 Installation....................................................................................................................................20
4.1 Checking Before Installation ......................................................................................................................................20
4.2 Tools ...........................................................................................................................................................................22
4.3 Determining the Installation Position .........................................................................................................................24
4.4 Moving the SUN2000.................................................................................................................................................27
4.5 Support-mounting the SUN2000 ................................................................................................................................28
4.6 Wall-mounting the SUN2000......................................................................................................................................33
5 Electrical Connections................................................................................................................42
5.1 Installing PGND Cables..............................................................................................................................................42
5.2 Connecting AC Output Power Cables.........................................................................................................................45
5.3 Installing DC Input Power Cables ..............................................................................................................................51
5.4 Connecting Communications Cables..........................................................................................................................57
5.4.1 Communications Port Description...........................................................................................................................57
5.4.2 Connecting RS485 Communications Cables ...........................................................................................................59
6 System Operation........................................................................................................................64
6.1 Checking Before Power-On........................................................................................................................................64
6.2 Powering on the SUN2000 .........................................................................................................................................64
6.3 Setting Initialization Parameters.................................................................................................................................65
7 LCD................................................................................................................................................68
7.1 Monitoring Menu Hierarchy.......................................................................................................................................68
7.2 Monitoring Operations................................................................................................................................................71

User Manual Contents
v
7.2.1 Viewing System Operating Information ..................................................................................................................71
7.2.2 Viewing Alarm Records...........................................................................................................................................77
7.2.3 Setting System Time Parameters .............................................................................................................................79
7.2.4 Setting the System Language...................................................................................................................................81
7.2.5 Setting the Contrast..................................................................................................................................................83
7.2.6 Setting the Currency and Currency Factor...............................................................................................................85
7.2.7 Changing a Password...............................................................................................................................................87
7.2.8 Setting Communications Parameters .......................................................................................................................89
7.2.9 Setting Protection Parameters..................................................................................................................................91
7.2.10 Setting Feature Parameters ....................................................................................................................................93
7.2.11 Setting Isolation Parameters...................................................................................................................................95
7.2.12 Enabling Manual Power-On and Power-Off..........................................................................................................96
7.2.13 Restoring Factory Settings.....................................................................................................................................99
7.2.14 Cleaning the User Data........................................................................................................................................101
7.2.15 Enabling the USB Guide Function ......................................................................................................................102
7.2.16 Viewing the System Version ................................................................................................................................105
8 Maintenance...............................................................................................................................107
8.1 Powering Off the SUN2000......................................................................................................................................107
8.2 Daily Maintenance....................................................................................................................................................108
8.3 Common Faults and Troubleshooting Measures.......................................................................................................108
9 Inverter-Associated Operations .............................................................................................115
9.1 Removing the SUN2000........................................................................................................................................... 115
9.2 Packing the SUN2000............................................................................................................................................... 115
9.3 Disposing the SUN2000 ........................................................................................................................................... 115
10 Technical Specifications ........................................................................................................116
11 Quality Assurance...................................................................................................................120
A Abbreviation.............................................................................................................................121
B Power Grid Standard Codes...................................................................................................122

User Manual 1 Safety Precautions
1
1 Safety Precautions
Read the safety precautions carefully to ensure human safety.
Personnel Requirements
 Only qualified and trained electrical technicians are allowed to operate the SUN2000.
 Operation personnel should understand the composition and working principles of the
PV grid-tied power system and local regulations.
Identification Protection
 The signs on the SUN2000 shell specify important information about secure operation.
Do not damage the signs.
 The nameplate attached to the SUN2000 side panel lists the SUN2000 parameter
information. Do not damage the nameplate.
Installation
Before installation, read this document carefully. Huawei shall not be liable for any
consequence caused by violation of the regulations specified in this document.
 Before installing the SUN2000, ensure that the SUN2000 is not connected or electrified.
 To ensure good heat dissipation and reserve enough space for installing the SUN2000,
the SUN2000 is at least 200 mm, 500 mm, 600 mm, and 1000 mm away from objects on
its both sides, top, bottom, and front respectively.
 Install the SUN2000 in environments with good ventilation to ensure system
performance.
 Ensure that the SUN2000 heat sinks are unblocked.
 Do not move the components inside the shelf except the wiring terminals at the bottom.
Electrical Connection

User Manual 1 Safety Precautions
2
Before connecting cables to the SUN2000, ensure that the SUN2000 is intact and secure.
Otherwise, electrical shocks or fire may be triggered.
 Before connecting cables to the SUN2000, shield the PV modules by using opaque cloth.
 All electrical connections must comply with local laws and regulations.
 Before using the SUN2000 to generate electricity in grid-tied mode, obtain approval
from the local power supply department.
 Ensure that the cables to the solar power system are properly connected and insulted
(That is, the insulation resistance between the ground and the main loop formed by PV
module strings, the SUN2000, and protective devices is less than 1 Mohm.) and meet
specifications.
Operation
High voltages may cause electrical shocks and death during SUN2000 operation. Strictly
comply with the safety precautions in this document and associated documents when
operating the SUN2000.
 Do not disconnect the DC power supply during the SUN2000 operation.
 Do not touch a running SUN2000 except for the liquid crystal display (LCD) and DC
switch because the shelf and heat sinks become hot during the SUN2000 operation.
 Only professionals are allowed to set initialization parameters during the first power-on
of the SUN2000. Incorrect settings may affect the SUN2000 operation and cause the
SUN2000 to conflict with local certification.
 Keep an over 20 cm distance away from the SUN2000 because radiation is generated
during the SUN2000 operation.
 When operating the SUN2000, follow local laws and regulations.
Maintenance and Replacement
 Before any maintenance, power off the SUN2000 based on the power-off guidelines and
then wait for at least 5 minutes.
 Stand temporary warning signs or fences to prevent unauthorized personnel to enter the
maintenance site.
 Rectify the faults that compromise the SUN2000 security performance before restarting
the SUN2000.
 A faulty SUN2000 requires overall maintenance. Contact the dealer if any fault occurs
inside the SUN2000.
 Maintain the SUN2000 after you get familiar with this document and tools and testing
equipment are prepared.
 When maintaining the SUN2000, wear ESD gloves and comply with ESD precautions.

User Manual 2 Overview
3
2 Overview
This topic describes the SUN2000 in terms of its functions, network application, appearance,
and working principles.
2.1 Introduction
Introduction of the function, model and application of the SUN2000.
Function
The SUN2000 is a grid-tied PV inverter. It converts the high-voltage DC power generated by
PV arrays into sine wave three-phase AC power with the same frequency and phase as the
power grid.
Model
Figure 2-1 shows the model composition of the SUN2000, taking SUN2000-17KTL as an
example.
Figure 2-1 Model 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
SUN2000-8KTL 8 kW
SUN2000-10KTL 10 kW

4
Model Rated Output Power
SUN2000-12KTL 12 kW
SUN2000-15KTL 15 kW
SUN2000-17KTL 17 kW
SUN2000-20KTL 20 kW
SUN2000-23KTL 23 kW
SUN2000-28KTL 27.5 kW
Application
The SUN2000 applies to commercial rooftop grid-tied systems and large power station
grid-tied systems. Typically, the grid-tied system consists of PV modules, grid-tied inverters,
and AC distribution modules (ACDUs), as shown in Figure 2-2.
Figure 2-2 SUN2000 application
A. PV array B. SUN2000
C. ACDU D. Power grid
Power Grid Modes for the SUN2000
The SUN2000-8KTL to SUN2000-23KTL support the following power grid modes: TN-S,
TN-C, TN-C-S, and TT, as shown in Figure 2-3. The SUN2000-28KTL supports the IT mode,
as shown in Figure 2-4.

5
 For TT grid mode, the valid value of the neutral-ground voltage should be less than 20 V.
 The SUN2000-28KTL applies to the medium-voltage grids and has three-phase, three-wire
outputs.
Figure 2-3 Power grid modes supported by the SUN2000-8KTL to SUN2000-23KTL
Figure 2-4 Power grid modes supported by the SUN2000-28KTL
2.2 Appearance
This topic describes the SUN2000 in terms of its appearance and specifications.

6
Front view
1. Shell 2. Control panel
The LCD displays the SUN2000 operating data, such as input power, output power, and electricity
output. The indicators show the SUN2000 operating status and its faults.

7
Side view
Rear view
1. Heat sink 2. Install mounting rackets

8
Bottom view
1. DC
switch
2. Ventilation
valves
3. DC input port (positive)
Note: The objects in blue are dustproof plugs. Remove
them before connecting DC input power cables.
4. USB port 5. RS485 IN
port
6. RS485 OUT port
7. AC
output port
8. Ground bolt 9. DC input port (negative)
Note: The objects in blue are dustproof plugs. Remove
them before connecting DC input power cables.
2.3 Symbol Conventions
Introduction of the symbols and nameplates of the SUN2000.
Symbol
Table 2-2 describes all symbols on the SUN2000.
Table 2-2 Symbols
Symbol Name Meaning
Danger high voltage label The SUN2000 operates at
high voltages. All operation
on the SUN2000 may only
be carried out by a trained
electrically skilled person.

9
Symbol Name Meaning
Delay discharge label There is residual voltage in
the SUN2000. The
SUN2000 needs 5 minutes
to electrically discharge.
High temperature label Do not touch a running
SUN2000 because it
generates high temperatures
on the shell.
Refer to the instructions
label
Remind operators to refer to
the documents shipped with
the SUN2000.
Grounding label Connect the SUN2000 to a
ground bar for grounding
purposes.
Operation warning label Do not remove the DC
input connector when the
SUN2000 is running.
CE certification label This product complies with
the Conformite Europeenne
(CE) certification standards.
CGC-Solar certification
label
This document complies
with CGC-Solar
certification standards.
EU waste electrical and
electronic equipment
(WEEE) label
Do not dispose the
SUN2000 as household
garbage. For details about
how to dispose the
SUN2000, see 9
Inverter-Associated
Operations.
Identifying Nameplates
Each SUN2000 is labeled with a nameplate on which you can view the model, technical
specifications, and certification label, as shown in Figure 2-5.

10
Figure 2-5 Nameplates
1. Trademark and product model of the
SUN2000
2. Technical specifications of the
SUN2000
3. Labels of certifications that the SUN2000
complies with
4. Company name and the
manufacturing place
Table 2-3 describes certification labels.
Table 2-3 Certification labels
Label Label Name Meaning
CGC-Solar certification
label
This document complies
with CGC-Solar
certification standards.
Note: The
SUN2000-8KTL,
SUN2000-10KTL, and
SUN2000-12KTL have no
this label.
Conformite Europeenne
(CE) certification label
This product complies with
the CE certification
standards.
Environmentally friendly
use period (EFUP) label
This product does not
pollute the environment
during a specified period.
EU waste electrical and
electronic equipment
(WEEE) label
Do not dispose the
SUN2000 as household
garbage.

11
2.4 Monitoring Panel
This topic describes the appearance of the monitoring panel, including an LCD, indicators,
and buttons.
Monitoring panel
The monitoring panel provides one LCD, four indicators, and four buttons, as shown in Figure
2-6.
Figure 2-6 Monitoring panel
1. LCD 2. Indicators 3. Buttons
LCD
The LCD displays the SUN2000 data in graphics and characters, including the operating
information, alarm information, system parameters, and user parameters.
If you do not press any button within 90s, the liquid crystal display (LCD) returns to the
default page automatically, as shown in Figure 2-7.

12
Figure 2-7 Default page
(1) Energy
yield
histogram
Allows you to view the energy yield data within 24 hours.
(2) Energy
yield data
 Allows you to view the date and time.
 Allows you to view the general energy yield data from 0:00 to the
current time.
 Allows you to view the total energy yield data from the startup time to
the current time.
(3) Power
flow diagram
 Allows you to view the number of PV string inputs.
The six boxes under the PV module stand for the number of PV string
inputs. where
− The box filled with a cross indicates that the corresponding PV
string is not connected or its power is low.
− The box filled with white or black indicates that the corresponding
PV string works properly.
 Allows you to view the power flow from the PV strings to the
SUN2000 and view the voltage and current of each input.
 Allows you to view the power flow from the SUN2000 to the power
grid and view the voltage and current of each output.
− For the SUN2000-8KTL to SUN2000-23KTL, displays the effective
values of the phase voltage and phase current of the SUN2000
three-phase output.
− For the SUN2000-24.5KTL, and SUN2000-28KTL, displays the
effective values of the line voltage and line current.
NOTE
The system displays the voltage and current of the route corresponding to the box
filled with black and switches between the connected PV strings every 10 seconds.
You can also perform manual switching by clicking and .
(4)
Output/Peak
power
Allows you to view the output power and peak power of the SUN2000.
 Figure 2-8 shows the displayed page when the sunlight does not meet the conditions for
the startup of the SUN2000.

13
Figure 2-8 Idle: Irradiation Detecting
 Figure 2-9 shows the displayed page when the SUN2000 detects a fault or a shutdown
command.
Figure 2-9 Shutdown: Fault
Indicators
The SUN2000 monitoring panel provides four indicators, which are described in Table 2-4.
Table 2-4 Indicator description
Indicator State Meaning
PV connection indicator Steady green The SUN2000 connects to at
least one of the PV arrays
properly.
Off The SUN2000 disconnects from
all PV arrays.
Feed in grid indicator Steady green The SUN2000 connects to the
power grid properly.
Off The SUN2000 disconnects from
the power grid.
Wireless connection
indicator
Reserved Reserved.

14
Indicator State Meaning
Alarm indicator Steady red The SUN2000 generates a major
alarm. For details about the
alarm, see 7.2.2 Viewing Alarm
Records.
Blinking red at short
intervals (on for 0.5s and
then off for 0.5s)
The SUN2000 generates a minor
alarm. For details about the
alarm, see 7.2.2 Viewing Alarm
Records.
Blinking red at long
intervals (on for 1s and
then off for 4s)
The inverter generates a
warning. For details about the
warning, see 7.2.2 Viewing
Alarm Records.
Buttons
The SUN2000 monitoring panel has four buttons, which are described in Table 2-5.
Table 2-5 Button description
Button Name Function
ESC Return
button
Allows you to return to the last page or end an
operation.
Cursor Up
button
Allows you to go to the upper-level menu or set
parameters.
Cursor
Down
button
Allows you to go to the lower-level menu or set
parameters.
Confirm
button
Allows you to go to the menu or confirm the value.
The backlight lasts 60s after you press any button.
2.5 Working Principles
This topic describes the SUN2000 working principles.
Conceptual Diagrams
 The SUN2000-15KTL, SUN2000-17KTL, SUN2000-20KTL, SUN2000-23KTL,
SUN2000-24.5KTL, and SUN2000-28KTL receive inputs from six PV strings. Then the

15
inputs are grouped into three MPPT routes inside the SUN2000 to track the maximum
power point of the PV strings.
 The SUN2000-8KTL, SUN2000-10KTL, and SUN2000-12KTL receive inputs from four
PV strings. Then the inputs are grouped into two MPPT routes inside the SUN2000 to
track the maximum power point of the PV strings.
After that, the DC power is converted into three-phase AC power through an inverter circuit.
Surge protection is supported on both the DC and AC sides. See Figure 2-10, Figure 2-11, and
Figure 2-12.
Figure 2-10 Conceptual diagram for the SUN2000-28KTL
Figure 2-11 Conceptual diagram for the SUN2000-15KTL, SUN2000-17KTL, SUN2000-20KTL,
and SUN2000-23KTL

16
Figure 2-12 Conceptual diagram for the SUN2000-8KTL, SUN2000-10KTL, and
SUN2000-12KTL
The working principles of the SUN2000 are described as follows:
 The SUN2000 analyzes the operating status of each PV array over the input current
measure circuit and generates an alarm to prompt maintenance if an exception occurs in
a PV array.
 The DC switch disconnects internal circuits from the DC input to facilitate maintenance.
 The category II DC surge protection device (SPD) on the input side provides the
discharge loop for the overvoltage power on the DC side to protect the SUN2000 internal
circuits from DC overvoltage.
 The input and output electromagnetic interference (EMI) filters filter out the
electromagnetic interference inside the SUN2000 to ensure that the SUN2000 meets
electromagnetic compatibility requirements.
 The MPPT circuits ensure optimal output power by measuring the voltages and currents
of PV arrays and tracking the MPP.
 The DC-AC conversion circuit converts DC power into AC power and then feeds the AC
power to the power grid. The output frequency and voltage match the power grid.
 The LC filter filters out the high-frequency components from the output current of the
SUN2000 to ensure that the output current meets power grid requirements.
 The output isolation relay isolates the inverter from the power grid if either of them is
faulty.
 The category III AC SPD on the output side provides the discharge loop for the
overvoltage power on the AC side to protect the SUN2000 internal circuits from AC
overvoltage.
Working Modes
Figure 2-13 shows the conditions for the SUN2000 to switch between working modes.

17
Figure 2-13 Working modes
Figure 2-13 describes the operations shown in Table 2-6.
Table 2-6
Working
Mode
Description
Standby The SUN2000 enters the standby mode when the external environment does
not meet the requirements for starting the SUN2000. In standby mode, the
SUN2000 continuously performs the self-check and enters the operating
mode once the operation requirements are met.
The standby mode involves four phases: initialization detection phase,
insulation resistance detection phase, sunlight detection phase, and no
sunlight phase.
If the SUN2000 receives a shutdown command or detects a fault after
startup in this mode, it enters the shutdown mode.
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 always tracks the maximum power point to maximize the
PV string output.
 The SUN2000 enters the shutdown mode after detecting a fault or a
shutdown command, and enters the standby mode after detecting that the
PV string output power does not meet the requirements for grid-tied
electricity generation.
Shutdown The SUN2000 enters the shutdown mode after detecting a fault or receiving

18
Working
Mode
Description
a shutdown command in standby or operating mode.
The SUN2000 may shut down due to a fault, after receiving a shutdown
command, or after manual operation.
After detecting a startup command or that a fault is rectified, the SUN2000
enters the standby mode.

User Manual 3 Inverter Storage
19
3 Inverter Storage
Closely read the following requirements for inverter storage:
The following requirements should be met if the inverter is not put into use directly:
 Do not unpack the inverter.
 Store the inverter at -40°C to +70°C and under humidity of 0 to 100% RH
(non-condensing).
 A maximum of four inverters can be stacked.
 Periodic inspections are required during the storage. If any rodent bites are found,
replace the packing materials immediately.
 If the inverter has been long-term stored, inspections and tests should be conducted by
qualified personnel before it is put into use.

User Manual 4 Installation
20
4 Installation
This topic describes how to install the SUN2000.
Context
 Do not install the SUN2000 on flammable building materials.
 Do not store the SUN2000 in areas with flammable or explosive materials.
Do not install the SUN2000 in places prone to body contact because the SUN2000 shelf and
heat sinks become hot during the SUN2000 operation.
4.1 Checking Before Installation
Before unpacking, check that the packing materials are intact. After unpacking, check that the
deliverables are complete and intact.
Checking Outer Packing Materials
Check the outer packing materials for damage, such as holes and cracks. If any damage is
found, do not unpack the SUN2000 and contact the dealer as soon as possible.
You are advised to remove the packing materials within 24 hours before installing the
SUN2000.

21
Checking Deliverables
After unpacking the SUN2000, check whether deliverables are intact and complete. If any
damage is found or any component is missing, contact the dealer.
Figure 4-1 shows the components and mechanical parts that should be delivered.
Figure 4-1 Deliverables
No. Name Quantity Description
1 SUN2000 1 N/A
2 Rear panel 1 N/A
3 Expansion bolt 3 Secures the rear panel to a wall.
4 DC input
connector
8/12 Connects to a DC input power cable.
 SUN2000-8KTL/10KTL/12KTL: 8 PCS (four
positive connectors and four negative connectors)
 SUN2000-15KTL/17KTL/20KTL/23KTL/28KTL:
12 PCS (six positive connectors and six negative
connectors)
5 Waterproof
RJ45
connector
2 Connects to a communications cable.
6 AC output
connector
1 Connects to an AC output power cable.
7 Metal terminal 8/12 Secures a connector to a DC input power cable.
NOTICE

22
No. Name Quantity Description
Positive and negative metal terminals are packed with
positive and negative connectors respectively. Separate the
positive from negative metal terminals after unpacking the
SUN2000 to avoid confusing the polarities.
8 Documentation 1 Includes the quick installation guide in paper copies
and user manual in a CD-ROM.
4.2 Tools
Prepare tools required for installation and electrical connections.
Tool Model Function
Hammer drill With a drill bit of Φ14 Drills holes on the wall
Adjustable wrench With an open end of larger
than or equal to 32 mm
Tightens expansion bolts
Torque screwdriver  Hexagon socket head: 5
mm
 Flat head: M6
 Hexagon socket head:
Secures screws to
mechanical parts
 Flat head: Removes
plastic screws from
lifting holes
Flat-head screwdriver 3x100
 Head width: 3-3.5 mm
 Pole length (excluding
the handle): at least 100
mm
 Large handle
 Tightens or loosens
screws when installing
AC power cables
 Used to remove AC
connectors from the
SUN2000
Socket wrench With an open end of 10
mm
Tightens ground bolts.
Diagonal pliers - Cut and tighten cable ties.

23
Tool Model Function
Wire stripper Applies to cables with
cross-sectional areas of 4
mm2
, 6 mm2
, and 10 mm2
Peels cable jackets.
Rubber mallet - Hammers expansion bolts
into holes.
Guarded blade utility knife - Removes packages.
Cable cutter Applies to cables with
cross-sectional areas of 4
mm2
, 6 mm2
, and 10 mm2
Cuts power cables.
Crimping tools H4TC0001
Manufacturer:
AMPHENOL
Crimps cables.
RJ11 crimping tool - Prepares RJ45 connectors
for communications
cables.
Removal tool H4TW0001
Manufacturer:
AMPHENOL
Removes DC connectors
from the SUN2000.
Vacuum cleaner - Cleans up dust after
drilling holes.
Multimeter - Checks the grounding
connections.
Marker Diameter: 10 mm at most Marks signs.

24
Tool Model Function
Measuring tape - Measures distances.
Level - Checks the levelness of
the backplanes.
ESD gloves - Protect your hands during
installation.
Safety goggles - Prevents dust from
entering your mouth and
nostrils during hole
drilling.
Anti-dust respirator - Prevents dust from
entering your mouth and
nostrils during hole
drilling.
4.3 Determining the Installation Position
Determine an appropriate position for installing the SUN2000.
Comply with the following requirements when determining the installation position:
 Do not install the SUN2000 on flammable building materials.
 Do not store the SUN2000 in areas with flammable or explosive materials.

25
Do not install the SUN2000 in places prone to body contact because the SUN2000 shelf and
heat sinks become hot during the SUN2000 operation.
 The installation methods and position match the weight and dimensions of the SUN2000.
For details, see 10 Technical Specifications.
 The wall is solid enough to bear the SUN2000.
 The cable connection area faces downwards.
 Install the SUN2000 vertically or lean it backward for at most 15 degrees.
 The SUN2000 is installed in an appropriate height for ease of observing and operating
the monitoring panel.
 The ambient temperature is below 50°C to ensure optimal SUN2000 operation and
extend the SUN2000's service life.
 The SUN2000 should be installed in well ventilated environment to ensure good heat
dissipation.
 The SUN2000 is not exposed to direct sunlight. Otherwise, the SUN2000 may overheat,
resulting in efficiency drop.
 In residential areas, the SUN2000 is not installed on gypsum boards or walls made of
similar materials which have a weak sound insulation performance because the noises
generated by the SUN2000 disturb residents.
 To ensure good heat dissipation and reserve enough space for installing the SUN2000,
the SUN2000 is at least 200 mm, 500 mm, 600 mm, and 1000 mm away from objects on
its both sides, top, bottom, and front respectively, as shown in Figure 4-2.
Figure 4-2 Minimum installation clearance
 When installing multiple SUN2000s, install them in the same line if sufficient space is
available and install them in triangle mode shown in Figure 4-3. If no sufficient space is

26
available. The stacked installation mode shown in Figure 4-4 is not recommended. The
clearance between SUN2000s meets requirements shown in the following figures.
Figure 4-3 Triangle installation mode

27
Figure 4-4 Stacked installation mode
If multiple SUN2000s are installed in high temperature areas, enlarge the clearance between
SUN2000s to ensure proper heat dissipation.
4.4 Moving the SUN2000
This topic describes how to move the SUN2000 to the installation position horizontally.
Procedure
Step 1 Insert hands into the slots on both sides of the SUN2000 and hold the handles, as shown in
Figure 4-5 and Figure 4-6. Two persons are required to move the SUN2000.

28
Figure 4-5 Moving the SUN2000 (1)
Figure 4-6 Moving the SUN2000 (2)
Step 2 Lift the SUN2000 from the packing case and move it to the installation position.
 To prevent device damage and personal injury, keep balance when moving the SUN2000
because the SUN2000 is heavy.
 Do not put the SUN2000 with its wiring terminals contacting the floor because the power
ports and signal ports are not designed to support the weight of the SUN2000. Place the
SUN2000 horizontally.
 When placing the SUN2000 on the floor, put foam or paper under the SUN2000 to protect
its shell.
----End
4.5 Support-mounting the SUN2000
Before installing the SUN2000, secure the shipped rear panel to the support. Then secure the
SUN2000 to the rear panel using hexagon screws.

29
Context
Figure 4-7 shows the SUN2000 rear view.
Figure 4-7 SUN2000 rear view
1. Heat sink 2. Mounting brackets
 If the installation location is near the ground, first connect the PGND cable to the ground before
installing the SUN2000 on the wall.For details, refer to 5.1 Installing PGND Cables.
 You are advised to install the SUN2000 in a position in the same height as your eyes to facilitate
operation and maintenance.
Procedure
Step 1 Determine the positions for drilling holes using the rear panel in the packing case, and mark
the hole positions using a marker, as shown in Figure 4-8.

30
Figure 4-8 Determining hole positions
Step 2 Drill holes using a hammer drill, as shown in Figure 4-9.
Figure 4-9 Drilling holes
Step 3 Align the rear panel with hole positions, insert M10 x 60 bolts into the holes, and tighten the
bolts to a torque of 30 N.m using a torque wrench, as shown in Figure 4-10.

31
Figure 4-10 Securing a rear panel
Step 4 Hold the handle at the bottom of the SUN2000 with one hand and hold the end of the other
handle near the SUN2000 top with the other end, and then stand the SUN2000, as shown in
Figure 4-11. Two persons are required to install the SUN2000.
To prevent personal injury caused by a falling SUN2000, keep balance when lifting the
SUN2000 because the SUN2000 has a heavy top.
Figure 4-11 Lifting a SUN2000
Step 5 Mount the SUN2000 on the rear panel and keep them aligned with each other, as shown in
Figure 4-12.

32
Figure 4-12 Mounting a SUN2000 on a rear panel
Step 6 Tighten the two hexagon screws at the bottom of the SUN2000 to a torque of 5 N.m, as
shown in Figure 4-13.
Figure 4-13 Tightening hexagon screws

33
Step 7 (Optional) Install an antitheft lock, as shown in Figure 4-14.
The function of an antitheft lock is to secure the SUN2000 to the rear panel and protect it
from stealing.
Figure 4-14 Installing an antitheft lock
----End
4.6 Wall-mounting the SUN2000
Before installing the SUN2000, secure the shipped rear panel to the wall. Then secure the
SUN2000 to the rear panel using hexagon screws.
Context
Figure 4-15 shows the SUN2000 rear view.

34
Figure 4-15 SUN2000 rear view
installing the SUN2000 on the wall. For details, refer to 5.1 Installing PGND Cables.
 You are advised to install the SUN2000 in a position in the same height as your eyes to facilitate
operation and maintenance.
Procedure
Step 1 Determine the positions for drilling holes using the rear panel in the packing case, and mark
the hole positions using a marker, as shown in Figure 4-16.

35
Figure 4-16 Determining hole positions
Step 2 Drill holes by using a hammer drill and install expansion bolts, as shown in Figure 4-18.
An expansion bolts contains four parts, as shown in Figure 4-17.
Figure 4-17 Expansion bolt composition
1. Expansion sleeve 2. Flat washer 3. Spring washer 4. M10 x 60 bolt

36
Figure 4-18 Drilling a hole and installing an expansion bolt
1. Put a hammer drill with a Ф14 drill bit on a marked hole position perpendicularly against
the wall and drill holes with a depth of 52-60 mm.
 To prevent dust inhalation or contact with eyes, wear safety goggles and an anti-dust
respirator when drilling holes.
 Vacuum any dust in or around the holes by using a vacuum cleaner and measure the hole
distance. If the holes are inaccurately positioned, drill holes again.
2. Vertically insert an expansion bolt into a hole, and knock the expansion bolt completely
into the hole by using a rubber mallet.
3. Remove the M10 x 60 bolt, spring washer, and flat washer by rotating them
counterclockwise.
Level the front of the expansion sleeve with the concrete wall after removing the bolt, spring
washer, and flat washer. Otherwise, the rear panel will not be securely installed on the
concrete wall.
Step 3 Align the rear panel with hole positions, insert expansion bolts into the holes, and tighten the
expansion bolts to a torque of 30 N.m using a torque wrench with a 17 mm open end, as

37
Figure 4-19 Securing a rear panel
Step 4 If the installation position is low and you can mount the SUN2000 on the rear panel, go to
Step 9 after performing Step 7.
Step 5 If the installation position is high and you cannot mount the SUN2000 on the rear panel,
perform Step 6 to Step 10.
Step 6 Remove the two rubber screws from the top of the SUN2000 using a flat-head screwdriver,
and install two M10 lifting eyes, as shown in Figure 4-20.
Figure 4-20 Installing lifting eyes
Step 7 Use one hand to hold the handle at the bottom of the SUN2000 and use the other hand to hold
the handle close to the top of the SUN2000 and then stand the SUN2000, as shown in Figure
4-21. Two persons are required to install the SUN2000.

38
To prevent device damage and personal injury, keep balance when lifting the SUN2000
because the SUN2000 has a heavy top.
Figure 4-21 Lifting the SUN2000
Step 8 Route a rope through the lifting eyes and hoist the SUN2000, as shown in Figure 4-22. The
rope must bear the SUN2000 weight.
When hoisting the SUN2000, keep balance to protect the SUN2000 from colliding with the
wall or other objects.

39
Figure 4-22 Hoisting the SUN2000
Step 9 Mount the SUN2000 on the rear panel and keep them aligned with each other, as shown in
Figure 4-23 and Figure 4-24.
Figure 4-23 Mounting the SUN2000 on the rear panel (front view)

40
Figure 4-24 Mounting the SUN2000 on the rear panel (rear view)
Step 10 Tighten the two hexagon screws at the bottom of the SUN2000 to a torque of 5 N.m, as
Figure 4-25 Tightening hexagon screws
Step 11 (Optional) Install an antitheft lock, as shown in Figure 4-26.
The function of an antitheft lock is to secure the SUN2000 to the rear panel and protect it
from stealing.

41
Figure 4-26 Installing an antitheft lock
----End

User Manual 5 Electrical Connections
42
5 Electrical Connections
This topic describes the SUN2000 electrical connections. Read this part carefully before
connecting cables.
Context
Before performing electrical connections, ensure that the DC switch is OFF. Otherwise, the
high voltage may result in fatal danger.
The cable colors shown in electrical connection schematic drawings are only for reference.
Select cables according to local cable specifications (Yellow-green wires are only used for
grounding).
5.1 Installing PGND Cables
Connect the SUN2000 to a ground bar over protection ground (PGND) cables for grounding
purposes.
Prerequisites
A ground cable has been prepared. Huawei recommends an outdoor power cable with a
cross-sectional area of 6 mm2
(10AWG).

43
Context
 Good grounding for the SUN2000 can help resist the impact of the surge voltage and improve the
EMI performance. First connect the PGND cable before connecting the AC power cable, DC power
cable, and communication cable.
For the system with one SUN2000, connect the PGND cable to the ground. For the system with
multiple SUN2000s, connect the PGND cables of all SUN2000s to a ground bar in equipotential
mode.
installing the SUN2000 on the wall.
A ground terminal has five parts, as shown in Figure 5-1.
Figure 5-1 Ground terminal composition
1. M6 welded stud 2. OT terminal 3. Flat washer 4. Spring washer 5. Nut
Procedure
Step 1 Remove the insulation layer with an appropriate length using a wire stripper, as shown in
Figure 5-2.
Figure 5-2 Stripped length
Note: L2 is 2 to 3 mm longer than L1.
Step 2 Insert the exposed core wires into the OT terminal and crimp them by using a crimping tool,
as shown in Figure 5-3.
Recommended OT terminals: OT M6.

44
Figure 5-3 Crimping a cable
Note 1: L3 is the length between the insulation layer of the ground cable and the crimped part.
L4 is the distance between the crimped part and core wires protruding from the crimped part.
Note 2: The cavity formed after crimping the conductor crimp strip shall wrap the core wires
completely. The core wires shall contact the terminal closely.
Step 3 Install the crimped OT terminal, flat washer, and spring washer on the M6 welded stud, and
tighten the nut to a torque of 5 N.m using a socket wrench, as shown in Figure 5-4.
Figure 5-4 Installing a ground cable
To enhance the anti-corrosion performance of the ground terminals, apply silica gel on them after
connecting the ground cable.
----End
Follow-up Procedure
To disconnect a ground cable, remove the nut from the M6 welded stud using an adjustable
wrench, and then remove the spring washer, flat washer, and crimped OT terminal.

45
5.2 Connecting AC Output Power Cables
Connect the SUN2000 to the AC power distribution frame (PDF) or power grid over AC input
power cables.
Prerequisites
An independent there-phase circuit breaker for each inverter must be installed at the output
side to ensure that the inverter can be securely disconnected. See 10 Technical Specifications
to select the specifications of breaker.
 It is not allowed for several inverters to use the same circuit breaker.
 It is not allowed to connect loads between inverter and circuit breaker.
Context
Huawei recommends a soft cable for ease of installation. The outer diameter of the conductor
should be less than or equal to 4.2 mm. Table 5-1 lists the specifications.
Table 5-1 RecommendedAC output power cable specifications
Inverter
Model
Cable Type Cross-sectional Area
(mm2)
External Cable Diameter (mm)
Range Recommended
Value
Range Recommended
Value
Range Recommended
Value
SUN2000
-8KTL
 4-core
outdoor
cable (3+N)
 5-core
outdoor
cable
(3+N+PE)
4-core outdoor
cable (3+N)
4–10
(12AWG–
8AWG)
4 (12AWG) 11–20
NOTE
 When the outer
cable diameter
ranges from 11
mm to 13 mm,
add cable
clamps.
 When the outer
cable diameter
ranges from 16
mm to 20 mm,
strip a seal ring
from the cable
sealing cover
interior.
 When the outer
diameter of an
armored cable
exceeds 20 mm,
strip the jacket
and armored
layer and take
waterproof and
15
SUN2000
-10KTL
SUN2000
-12KTL
SUN2000
-15KTL
6–10
(10AWG–
8AWG)
6 (10AWG)
SUN2000
-17KTL
SUN2000
-20KTL
SUN2000
-23KTL
SUN2000
-24.5KTL
 3-core
outdoor
3-core outdoor
cable

46
Inverter
Model
Cable Type Cross-sectional Area
(mm2)
External Cable Diameter (mm)
Range Recommended
Value
Range Recommended
Value
Range Recommended
Value
SUN2000
-28KTL
cable
 4-core
outdoor
cable
(3+PE)
ultraviolet-proof
measures on the
cable.
 If the ground cable has been installed according to 5.1 Installing PGND Cables, you do not
have to connect the PE wire of the AC output power cable.
 If a cable with a cross-sectional area of 4 mm2
to 10 mm2
is used, crimp a tubular cord end
terminal at the cable end before installing the cable.
An AC output connector has three parts: coupling nut, adapter, and cable gland, as shown in
Figure 5-5.
Figure 5-5 AC output connector
1. Coupling nut 2. Adapter 3. Cable gland
Procedure
Step 1 Remove the cable gland and the adapter from the AC output connector.
Step 2 Remove the insulation layer of the AC output cable of an appropriate length using a wire
stripper.

47
The three-phase AC input power cables, neutral cable, and PGND cable must be properly
connected. (No neutral cable connections are involved for the SUN2000-28KTL.)
1. Strip the outer jacket of AC output cable by 55 mm.
2. Strip the insulation layer of each core wires by 12 mm.
Figure 5-6 Stripped length (unit: mm)
The preceding figure shows only how to strip cables for the SUN2000-8KTL to SUN2000-23KTL. For
the SUN2000-28KTL, align the neutral cable with the protective jacket and cut off the neutral cable.
When cutting off the cable, take protective measures to prevent the cable from splashing and
hurting people.
Step 3 Insert AC output cable (L1, L2, L3 and N) into the cable gland and the adapter, as shown in
Figure 5-7 and Figure 5-8.
When the outer diameter of the cable is greater than 16 mm, remove a seal ring from the cable gland
before inserting the power cable into the cable gland and the adapter.
Figure 5-7 Stripping a seal ring

48
Figure 5-8 Installing a cable sealing cover and socket
Step 4 Loosen the screws inside the coupling nut holes using a flat-head screwdriver, insert the core
wires into corresponding holes, and tighten the screws, as shown in Figure 5-9 and Figure
5-10.
Tighten the screws to a torque of 0.7 N.m.
Figure 5-9 Auxiliary connector
 Connect L1 to the hole numbered 1.
 Connect N to the hole numbered 4.
For the SUN2000-28KTL, do not connect the neutral cable to the hole numbered 4.

49
Figure 5-10 Connecting cables to an auxiliary connector
Step 5 Check that all core wires are properly connected, as shown in Figure 5-11.
Figure 5-11 Checking the cable connection
Step 6 Secure the adapter to the coupling nut, as shown in Figure 5-12.
Tighten the adapter to a torque of 1-2 N.m.
Figure 5-12 Installing a socket
Step 7 Secure the cable gland to the adapter, as shown in Figure 5-13.

50
Tighten the cable gland to a torque of 5 N.m (You need to use some tool to achieve this
torque).
Figure 5-13 Installing a cable sealing cover
Step 8 Connect the AC output connector to the bayonet coupling of the AC output wiring terminal on
the SUN2000 and rotate it clockwise until you hear a "click" sound, as shown in Figure 5-14.
Because no sufficient space is available on the right of the AC terminal, tighten the terminal
using the left hand.
Figure 5-14 Connecting an AC output connector
The AC output connector securely connects to the AC output wiring terminal after the
bayonet coupling snaps into place.
----End
Follow-up Procedure
To remove an AC output connector from the SUN2000, press the locking plate on the
coupling nut using a flat-head screwdriver and rotate the AC output connector
counterclockwise, as shown in Figure 5-15.

51
Before removing the AC output connector, disconnect the circuit breaker between the
SUN2000 and the power grid.
Figure 5-15 Removing anAC output connector
5.3 Installing DC Input Power Cables
Connect the SUN2000 to PV arrays over DC input power cables
Prerequisites
 PV modules generate electric energy when exposed to sunlight and can create an
electrical shock hazard. Therefore, when connecting DC input power cables, cover PV
modules by using opaque cloth.
 Before performing electrical connections, ensure that voltages of the DC cables should
be within the safe voltage range, that is, lower than 60 V DC, and the DC SWITCH is
OFF. Otherwise, the high voltage may result in fatal danger.
Ensure that the following conditions are met. Otherwise, fire accident may occur.

52
 PV modules connected in series in each PV array are of the same specifications.
 The open-circuit voltage of each PV array is always lower than or equal to 1000 V DC.
 The open-circuit voltage of each PV array is always lower than or equal to 23 A DC.
 The positive and negative terminals of PV arrays connect to the positive and negative DC
input terminals respectively.
 If the SUN2000 connects to the power grid directly, ensure that the PV arrays are not
grounded.
 If the DC voltage is a non-zero value between the positive terminal of PV arrays and the
ground, the PV arrays are subject to insulation faults. Rectify the fault before connecting
cables.
 During PV array and SUN2000 installation, the positive or negative terminals of PV arrays
may be grounded if power cables are not properly installed or routed. In this case, an AC
or DC short circuit may occur and damage the SUN2000.
 If the PV arrays need to be grounded, install a three-phase four-wire isolation transformer
on the output side and set the parameter of Isolation to Input Grounded, With TF by
referring to 7.2.11 Setting Isolation Parameters. If no isolation transformer is connected,
the SUN2000 will not operate properly.
Context
Figure 5-16 shows the MPPT distribution of the SUN2000.
Figure 5-16 MPPT distribution
 The SUN2000-8KTL to SUN2000-12KTL provide two MPPT routes to track the
maximum power point for PV strings. Therefore, two to four DC inputs should be evenly
distributed on two terminal groups.
 The SUN2000-15KTL to SUN2000-28KTL provide three MPPT routes to track the
maximum power point for PV strings. Therefore, two to six DC inputs should be evenly
distributed on three terminal groups.
DC input cables with the specifications specified in Table 5-2 are recommended.

53
Table 5-2 Recommended DC input cable specifications
Cable Type Cross-Sectional Area (mm2) External Cable
Diameter (mm)
Range Recommended
Value
Common PV cables
in the industry
4-6 4 4.5-7.8
Cables with high rigidity, such as armored cables, are not recommended, because poor contact
may be caused by the bending of the cables.
DC input connectors are classified into positive and negative connectors, as shown in Figure
5-17 and Figure 5-18.
Figure 5-17 Positive connector composition
1. Housing 2. Cable gland
Figure 5-18 Negative connector composition
1. Housing 2. Cable gland

54
Positive and negative metal terminals are packed with positive and negative connectors
respectively. Separate the positive from negative metal terminals after unpacking the
SUN2000 to avoid confusing the polarities.
Procedure
Step 1 Remove cable glands from the positive and negative connectors.
Step 2 Remove the insulation layer with an appropriate length from the positive and negative power
cables by using a wire stripper as show in Figure 5-19.
PV power cables with a cross-sectional area of 4 mm2
are recommended.
Cables with high rigidity, such as armored cables, are not recommended, because poor contact
may be caused by the bending of the cables.
Figure 5-19 Connecting DC input power cables (1)
1. Positive power cable 2. Negative power cable

55
Step 3 Insert the stripped positive and negative power cables into the positive and negative metal
terminals respectively and crimp them using a clamping tool. Ensure that the cables are
crimped until they cannot be pulled out by force less than 400 N, as shown in Figure 5-20.
Figure 5-20 Crimping a metal terminal
Step 4 Insert crimped positive and negative power cables into corresponding insulation covers until
they snap into place, as shown in Figure 5-21.
Figure 5-21 Engaging metal terminals
Insert the crimped positive and negative power cables into the corresponding insulation
covers. Check that the cables are in position by slightly pulling them back.
Step 5 Reinstall cable glands on positive and negative connectors and rotate them against the
insulation covers.
t is recommended that you secure the nut by using removal wrenches, as shown in Figure
5-22.

56
Figure 5-22 Locking a nut
Step 6 Take off the blue dustproof plugs from the bottom of the DC input connectors.
Step 7 Insert the positive and negative connectors into corresponding DC input terminals of the
SUN2000 until you hear a "click" sound, as shown in Figure 5-23.
Figure 5-23 Positive and negative connectors

57
After the positive and negative connectors are in position, the clearance between the DC
terminals and connectors should be less than or equal to 0.8 mm.
----End
Follow-up Procedure
To remove the positive and negative connectors from the SUN2000, insert a removal wrench
into the bayonet and press the wrench with an appropriate strength, as shown in Figure 5-24.
Before removing the positive and negative connectors, ensure that the DC SWITCH is OFF.
Figure 5-24 Removing a DC input connector
5.4 Connecting Communications Cables
This topic describes the functions of USB and RS485 ports and the method of connecting
RS485 communications cables.
5.4.1 Communications Port Description
This topic describes the functions of the USB and RS485 ports.
Overview
The SUN2000 has three communications ports: USB port, RS485 IN port, and RS485 OUT
port. They are on the left, upper right, and lower right respectively. For details, see (4), (5),
and (6) in Appearance.

58
USB Port
The SUN2000 communicates with the USB flash drive over a USB port to implement
functions of firmware upgrade, configuration loading, data downloading, and configuration
downloading.
RS485 Port
The SUN2000 communicates with the RS485 port to send the data of energy yield, alarm
information, and running status to the PC terminal of the element management system (EMS)
monitoring software (such as the NetEco) and the local data collector (such as the Smart
Logger).
The SUN2000 communicates with the RS485 port by using the following methods:
 If only one SUN2000 is used, use a communication cable with waterproof RJ45
connectors, and choose either of the two RS485 ports and cover the unused port by using
a waterproof cover.
Set Match Resistance of the inverter to Connect in Comm. Param. (For details about
this, see 7.2.8 Setting Communications Parameters), and the single point of the shielded
layer of the communication cable must be grounded.
 If multiple SUN2000s are used, connect all SUN2000s in daisy chain mode over the
RS485 communication cable.
Set Match Resistance of every inverter at the end of the daisy chain to Connect in
Comm. Param. (For details about this, see 7.2.8 Setting Communications Parameters),
and the single point of the shielded layer of the communication cable must be grounded.
 Connect the SUN2000 to the PC terminal over an RS485/RS232 converter to implement
communication.
 Connect the SUN2000 to the Smart Logger to perform data collection and monitoring, or
connect to the PC terminal over the Smart Logger to implement communication.
Figure 5-25 shows how one SUN2000 connects to the Smart Logger and the PC terminal.
Figure 5-26 shows how multiple SUN2000s connect to the Smart Logger and the PC terminal.
Figure 5-25 RS485 communication mode (1)

59
Figure 5-26 RS485 communication mode (2)
 The length of the communication cable should be less than 1000 m.
 If multiple SUN2000s are connected to the monitoring device over an RS485/RS232 converter, a
maximum of six SUN2000s can be connected in a daisy chain.
 If multiple SUN2000s are connected to a Smart Logger, a maximum of 60 SUN2000s can be
connected in three daisy chains (a maximum of 20 SUN2000s is supported in one daisy chain).
5.4.2 Connecting RS485 Communications Cables
Connect the SUN2000 to communications equipment (such as the data collector and PC
terminal) over RS485 communications cables.
Context
You are recommended to use 24 AWG outdoor shielded network cables with the internal
resistance less than or equal to 1.5 ohms/10 m and external diameter of 4.5 mm to 7.5 mm as
RS485 communications cables.
A waterproof RJ45 connector has five parts: plug, housing, screw nut, seals, and sealing nut.
See Figure 5-27.

60
Figure 5-27 Waterproof RJ45 connector composition
1. Plug 2. Housing 3. Screw nut
4. Seals 5. Sealing nut
When routing communications cables, ensure that communications cables are separated from
power cables and away from interference sources to prevent communication interruptions.
Procedure
Step 1 Remove the insulation layer of an appropriate length from the shielded network cable using a
wire stripper.
Step 2 Insert the shielded network cable into the sealing nut, seals, screw nut, and housing.
Step 3 Connect the stripped network cable to corresponding pins on the plug, as shown in Figure
5-28.

61
Figure 5-28 Connecting a communications cable (1)
Figure 5-28 shows the side without a clip.
Table 5-3 lists the cable colors and functions.
Table 5-3 Cable colors and functions
No. Color Function
1 White and orange RS485A, RS485 differential
signal +
2 Orange RS485B, RS485 differential signal
-
3 White and green PGND
4 Blue RS485A, RS485 differential
signal +
5 White and blue RS485B, RS485 differential signal
-
6 Green PGND
7 White and brown PGND
8 Brown PGND

62
Step 4 Crystal plug with RJ11 crimping tool.
Step 5 Secure the housing to the plug, as shown in Figure 5-30.
Step 6 Insert the seals into and secure the screw nut to the housing, as shown in Figure 5-31.
Step 7 Secure the sealing nut to the housing, as shown in Figure 5-32.
Step 8 Insert the plug into the RS485 port on the SUN2000, and tighten the screw nut.
----End

63
Follow-up Procedure
To remove an RJ45 connector from the SUN2000, remove the screw nut, press the clip on the
RJ45 connector, and then pull out the shielded RJ45 connector.

User Manual 6 System Operation
64
6 System Operation
6.1 Checking Before Power-On
To ensure the normal SUN2000 operating, check the SUN2000 before powering it on.
Before powering on the SUN2000, check that:
1. The SUN2000 is installed correctly and securely.
2. The ground cable is securely connected.
3. All AC output power cables are properly connected.
4. All DC input power cables are properly connected.
5. Unused DC input terminals are sealed.
6. Idle USB and RS485 ports are blocked with waterproof plugs.
6.2 Powering on the SUN2000
This topic describes how to power on the SUN2000 after electrical connection is complete.
Procedure
Step 1 Switch on the AC circuit breaker between the SUN2000 and the power grid.
If you perform Step 2 before Step 1, the SUN2000 generates an abnormal shutdown alarm.
You can start the SUN2000 only after faults are automatically rectified. The default alarm
clearance time is 5 minutes. You can modify the time over the EMS software of the PC
terminal.
The monitoring panel can be activated only after power is supplied to the DC or AC side.
Step 2 Ensure that the DC SWITCH at the bottom of the SUN2000 is ON.

65
Step 3 (Optional) Measure the temperatures at the joints between the DC terminals and the
connectors by using a point thermometer.
----End
6.3 Setting Initialization Parameters
When starting the SUN2000 for the first time, set initialization parameters on the monitoring
panel. The initialization parameters include the system language, system time, and power grid
standard code.
Context
If the SUN2000 is started for the first time, set the initialization parameters by referring to this section. If
the SUN2000 is not started for the first time, it will enter the startup detection page.
Procedure
 The following table describes the process for setting initialization parameters. The
parameter values in the figures are for reference only.
LCD Operation Procedure
1. After startup, the SUN2000 enters the
initialization page.
The default system language is English.
2. Press to enter the Wizard page.
To return to the default page, press ESC. To
reset initialization parameters in the future,
choose Settings > Wizard as Advanced User.

66
3. After selecting a display language, click
.
The pages will be displayed in the selected
language.
4. After setting the correct date and time, click
.
 To select the parameter, click . To set
the parameter value, set or .
 The date is displayed in the format of
YYYY-MM-DD. The time is displayed in
the format of hh-mm-ss. in which hh, mm,
and ss stand for hour, minute, and second
respectively.
5. After setting the power grid standard code,
click .
To select a power grid standard code, click
or .
NOTE
 When the illumination is weak, the grid code
cannot be successfully set. Wait until the
illumination becomes sufficient, log in to the
system as Advanced User , and choose
Settings > Init Wizard to set the grid code.
 The SUN2000-28KTL applies only to the
medium-voltage grid-feeding scenarios. The
power grid standard codes supported are the
China medium-voltage grid standard code,
Germany medium-voltage grid standard code,
and user-defined medium-voltage grid standard
code.
6. On the Finished page, click .

67
For multiple SUN2000s networked, after the initialization parameters are set, you need to set
the address and baud rate for each SUN2000 by following the rules below:
 Addresses for all SUN2000s in the same daisy chain should be different from each other.
Addresses of all devices in the daisy chain should be in the scope of the SmartLogger
address and different from each other, if communication with the SmartLogger is required.
 Baud rates of all SUN2000s in the same daisy chain should be the same. Baud rates of all
devices in the daisy chain should be consistent with that of the SmartLogger, if
communication with the SmartLogger is required.
----End

User Manual 7 LCD
68
7 LCD
This topic describes the monitoring panel, monitoring menu, default page, and monitoring
operations.
7.1 Monitoring Menu Hierarchy
This topic describes the monitoring menu hierarchy, which allows you to perform operations
conveniently.
Figure 7-1 shows the monitoring menu hierarchy.

User Manual 7 LCD
69
Figure 7-1 Monitoring menu hierarchy (1)
The parameters vary depending on users (such as common user, advanced user, and special
user). Figure 7-2 and Figure 7-3 show the hierarchy under the Settings and Maintanance
menus.
The initial passwords for Common User, Advanced User and Special User are 000001.
Login inverter for the first time to use the initial password, and change the password as soon
as possible to ensure account safety.

User Manual 7 LCD
70

User Manual 7 LCD
71
Login inverter as a Common User because of permissions restrictions, there is no submenu under the
Maintanance menu.
7.2 Monitoring Operations
This topic describes how to perform monitoring operations on the monitoring panel, such as
viewing system operating information and setting user parameters.
7.2.1 Viewing System Operating Information
This topic describes how to view the SUN2000 operating information on the monitoring panel.
The operating information includes the daily energy yield, monthly energy yield, year energy
yield, historical energy yield, total energy yield, ISO value, input data, output data, and the
cabinet temperature.
Procedure
 The following table describes the procedure for viewing system operating information.
The parameter values in the figures are for reference only.

User Manual 7 LCD
72
1. On the default page, press to enter the
main menu.
2. Choose and press .
3. Select an operating parameter by pressing
and click .
The operating information includes the daily
energy yield, monthly energy yield, year
energy yield, historical energy yield, total
energy yield, ISO value, input data, output
data, and the cabinet temperature.

User Manual 7 LCD
73
4. View the daily energy yield.
1. On the E-Day page, view the total energy
yield and hourly energy yield on the
current day.
The displayed information includes the
daily energy yield histogram, date, total
energy yield on the current day, CO2
emission reduction, and income
corresponding to the energy yield.
NOTE
In the daily energy yield histogram, the horizontal
ordinate stands for time (each block stands for one
hour). The vertical coordinate stands for the energy
yield (each block stands for the total energy yield
during the last hour).
2. Press to view the energy yield of a
specific hour on the current day.
To switch between hours, press or
.
NOTE
The selected block is displayed in white.
NOTICE
To view the energy yield in the past 30 days
(including the current day), press or . To
view the energy yield of a specific hour on the
current day, press .
5. View the monthly energy yield.
1. On the E-Month page, view the total
energy yield and daily energy yield on the
current month.
monthly energy yield histogram, date, total
energy yield of the current month, CO2
NOTE
In the monthly energy yield histogram, the
horizontal ordinate stands for day (each block
stands for one day). The vertical coordinate stands
for the energy yield (each block stands for the total
energy yield on that day).
2. Press to view the energy yield on a
specific day of the current month.
To switch between days, press or .
NOTE
NOTICE
To view the energy yield in the past 12 months

User Manual 7 LCD
74
(including the current month), press or .
To view the energy yield on a specific day of the
current month, press .
6. View the year energy yield.
1. On the E-Year page, view the total energy
yield and month energy yield on the
current year.
yearly energy yield histogram, date, total
energy yield of the current year, CO2
NOTE
In the yearly energy yield histogram, the horizontal
ordinate stands for month (each block stands for one
month). The vertical coordinate stands for the
energy yield (each block stands for the total energy
yield on that month).
2. Press to view the energy yield on a
specific month of the current year.
To switch between months, press or
.
NOTE
NOTICE
To view the energy yield in the past 25 years
(including the current year), press or . To
view the energy yield on a specific month of the
current year, press .

User Manual 7 LCD
75
7. On E-History page, view the historical
energy yields. The LCD will display the
yearly energy yield histogram, time periods,
total energy yield of the selected year, CO2
emission reduction, and revenue
corresponding to the CO2 emission reduction.
Data of the past 25 years (current year
included) are available.
NOTE
In the historical energy yield histogram, the
horizontal axis indicates time (by year), and the
vertical axis indicates the energy yield. Each
column indicates the total energy yield of a year.
Press , then press or to view the
energy yield of the selected year.
8. On the E-Total page, view the total energy
yield, CO2 emission reduction, and revenue
corresponding to the CO2 emission reduction
from the startup time to the current time.

User Manual 7 LCD
76
9. On the ISO Value page, view the day ISO
value on the current month.
To view the maximum insulation resistance
detected when the SUN2000 connects to the
power grid for the last time on each day of the
current month, press .
10. On the Input Data page, view the voltage
and current of each PV input.
The display page of the SUN2000-8KTL
to SUN2000-23KTL is taken as an
example.
11. On the Output Data page, view the phase
voltage, output current, power, frequency, and
power factor of each phase.
NOTE
As the SUN2000-28KTL has three-phase,
three-wire outputs, the output voltage and current
are line voltage and line current.

User Manual 7 LCD
77
12. On the Cabinet Temp. page, view the
temperature of the input SUN2000.
----End
7.2.2 Viewing Alarm Records
This topic describes how to view active and historical alarm records and set the alarm record
sort mode on the monitoring panel.
Context
The liquid crystal display (LCD) can display a maximum of 800 latest alarm records.
Procedure
 The following table describes the procedure for viewing active alarms and historical
alarms and setting the alarm record sort mode. The parameter values in the figures are
for reference only.
main menu.

User Manual 7 LCD
78
3. Select a menu by pressing , and view
alarm details, clear an alarm, or set the alarm
record sort mode by pressing .
 To view active alarms, go to step 4.
 To view historical alarms, go to step 5.
 To set the alarm record sort mode, go to
step 6.
4. On the Active Alarm (A/B) page, select an
alarm record, and press to view the alarm
details.
The alarm details include the alarm ID, alarm
severity, occurrence time, location
information, and reason ID.
A stands for the sequence of the alarm in the
active alarm list. B stands for the total number
of active alarms.

User Manual 7 LCD
79
5. On the Alarm History (A/B) page, select
an alarm record, and press to view the
alarm details.
The alarm details include the alarm ID, alarm
severity, termination time, location
information, and reason ID.
A stands for the sequence of the alarm in the
historical alarm list. B stands for the total
number of historical alarms.
6. On the Sort By page, select By Generation
Time or By Alarm Severity.
----End
7.2.3 Setting System Time Parameters
This topic describes how to set the time and date for the SUN2000 on the monitoring panel.

User Manual 7 LCD
80
Procedure
 The following table describes the procedure for setting the time and date. The parameter
values in the figures are for reference only.
main menu.
3. Enter the user name and password by
pressing or , and press .
NOTE
 The selectable user names are Common User
or Advanced User. The initial password for
Common User and Advanced User is 000001.
If you forget the password, contact Huawei
technical support for a dynamic password that is
effective only on the current day. Change the
password after login.
 After the authentication is successful, the
system keeps the authentication information for
30 seconds. If you exit from the Settings page
and log in again within 30 seconds, no
authentication is required.
Log in to the SUN2000 as Advanced
4. Choose User Param., and press .

User Manual 7 LCD
81
User.
5. Choose Date Format or Date&Time by
pressing , and press
6. On the Date Format page, select a date
format, and press .
The selectable date formats include
YYYY-MM-DD, MM-DD-YYYY and
DD-MM-YYYY. YYYY, MM, and DD stand
for year, month, and day respectively.
7. On the Date&Time page, set the date and
time, and press .
 To select the parameter, click . To set
the parameter value, set or .
 The date and time are displayed in the
formats of YYYY-MM-DD and hh-mm-ss
respectively. hh, mm, and ss stand for
hour, minute, and second respectively.
----End
7.2.4 Setting the System Language
This topic describes how to set the SUN2000 display language on the monitoring panel.

User Manual 7 LCD
82
Procedure
 The following table describes the procedure for setting the display language. The
main menu.
NOTE

User Manual 7 LCD
83
User.
5. Choose Language by pressing , and
press .
6. On the Language page, select a display
language, and press .
language.
----End
7.2.5 Setting the Contrast
This topic describes how to set the SUN2000 contrast on the monitoring panel.
Procedure
 The following table describes the procedure for setting the contrast. The parameter
main menu.

User Manual 7 LCD
84
NOTE
User.
5. Choose Contrast by pressing , and
press .

User Manual 7 LCD
85
6. On the Contrast tab, press and to
set the contrast.
language.
----End
7.2.6 Setting the Currency and Currency Factor
This topic describes how to set the currency and the revenue per kilowatt hour, which allows
you to calculate the revenue corresponding to the energy yield.
Procedure
 The following table describes the procedure for setting the currency and currency factor.
The parameter values in the figures are for reference only.
main menu.

User Manual 7 LCD
86
NOTE
User.
5. Set the currency.
1. Select Currency by pressing , and
press .
2. Select a currency, and press .
The selectable currencies include EUR,
GBP, USD, and CNY.

User Manual 7 LCD
87
6. Set the currency factor.
NOTE
The currency factor is the local electricity price.
1. Select Currency Factor by pressing ,
and press .
2. Set the currency factor by pressing or
, and press .
----End
7.2.7 Changing a Password
This topic describes how to change a password on the monitoring panel.
Procedure
 The following table describes the procedure for setting a new password. The parameter
main menu.

User Manual 7 LCD
88
NOTE
 The user name can be set to Common User,
Advanced User, and Special User. The initial
password for Common User, Advanced User,
and Special User is 000001. If you forget the
password, contact Huawei technical support for
a dynamic password that is effective only on the
current day. Change the password after login.
4. Choose User Password by pressing ,
and press .
5. Enter the old password and press .
Increase or decrease the value by pressing
or . Switch between data bits by pressing
.

User Manual 7 LCD
89
6. Enter a new password and press .
Increase or decrease the value by pressing
or . Switch between data bits by pressing
.
7. Enter the new password again and press
.
NOTE
Ensure that the confirm password is the same as the
new password. otherwise, an error message will be
displayed.
After password changing is complete, the
LCD displays a message, displaying that the
operation is successful.
----End
7.2.8 Setting Communications Parameters
This topic describes how to set RS485 communications parameters, including the address,
protocol, baud rate, and check mode.
Procedure
 The following table describes the procedure for setting communications parameters. The

User Manual 7 LCD
90
main menu.
NOTE
 The selectable user name is Advanced User.
The initial passwords for Advanced User is
000001. If you forget the password, contact
Huawei technical support for a dynamic
password that is effective only on the current
day. Change the password after login.
4. Choose Comm. Param., and press .

User Manual 7 LCD
91
5. On the Comm. Param. page, press .
6. Set Address, Protocol, Baud Rate, and
Match Resistance, and press .
 The selectable display addresses include 1
to 63.
 The selectable display protocol is Modbus.
 The selectable display baud rates include
4800bps, 9600bps, and 19200bps.
 The selectable display status of the match
resistance include Disconnect and
Connect.
This parameter is set to Disconnect by
default. If signals are distorted or the
communication is of poor quality because
the signal cable is too long, set the
parameter to Connect.
----End
7.2.9 Setting Protection Parameters
This topic describes how to set SUN2000 protection parameters on the monitoring panel.
Procedure
 The following table describes the procedure for setting protection parameters. The

User Manual 7 LCD
92
main menu.
NOTE
 The selectable user names are Advanced User
and Special User. The initial password for
Advanced User and Special User is 000001. If
you forget the password, contact Huawei
User.
4. Choose Protect Param. and press .
 If you log in to the SUN2000 as Advanced
User, perform step 5.
 If you log in to the SUN2000 as Special
User, perform step 6.

User Manual 7 LCD
93
The preceding figure is displayed if you
have logged in to the SUN2000 as
Advanced User.
5. Select a parameter, and press .
----End
7.2.10 Setting Feature Parameters
This topic describes how to set SUN2000 feature parameters on the monitoring panel.
Procedure
 The following table describes the procedure for setting feature parameters. The
main menu.

User Manual 7 LCD
94
NOTE
User.
4. Choose Feature Param. and press .
 If you log in to the SUN2000 as Advanced
User, perform step 5 only.
 If you log in to the SUN2000 as Special
User, perform step 6 only.
Advanced User.
5. Set LVRT, Anti-Islanding, Power Limit,
Power Factor, String Monitor, and press
.
If the String Monitor is enabled, the
SUN2000 monitors the operating status of all
the connected PV strings in real time. If the
operating status is abnormal, warnings are
generated to remind customers to rectify the
fault (components are shielded for a long time,
or components are faulty) in time.
6. Set Ugrid-Unbalance, 10-min Over-Vout,
and 10-min OV Prot.time, and press .
According to the difference of current Grid
Code choice, the parameters are different.

User Manual 7 LCD
95
Special User.
----End
7.2.11 Setting Isolation Parameters
This topic describes how to set SUN2000 isolation parameters on the monitoring panel.
Context
To ground PV arrays, install a three-phase four-wire isolation transformer and the parameter
of Isolation is set to Input Grounded, With TF.
Procedure
 The following table describes the procedure for setting isolation parameters. The
main menu.

User Manual 7 LCD
96
NOTE
and Advanced User. The initial password for
4. Choose Isolation and press .
5. Select one isolation method, and press .
----End
7.2.12 Enabling Manual Power-On and Power-Off
This topic describes how to enable manual power-on and power-off on the monitoring panel.
Procedure
 The following table describes the procedure for enabling manual power-on and
power-off. The parameter values in the figures are for reference only.

User Manual 7 LCD
97
main menu.
NOTE
 The user name can be set to Common User,
Advanced User, and Special User. The initial
password for Common User, Advanced User,
and Special User is 000001. If you forget the
password, contact Huawei technical support for
a dynamic password that is effective only on the
current day. Change the password after login.
User.
4. Choose Power-On/Off, and press .
 If you want to enable manual power-on, go
to step 5.
 If you want to enable manual power-off, go
to step 6.

User Manual 7 LCD
98
5. Enable manual power-on.
1. Choose Power-On and press .
2. Enter again to confirm your settings.
6. Enable manual power-off.
1. Choose Power-Off, and press .
2. Enter again to confirm your settings.
----End

User Manual 7 LCD
99
7.2.13 Restoring Factory Settings
This topic describes how to restore factory settings for the SUN2000 on the monitoring panel.
After restoring factory settings is complete, all parameters except the current date and time
will restore the default factory settings. However, the operating information, alarm records,
and system logs do not change.
Context
 Perform this operation with caution because all parameters except the current date and
time will restore to factory settings!
 To ground PV arrays, install a three-phase four-wire isolation transformer and the
parameter of Isolation is set to Input Grounded, With TF.
Procedure
 The following table describes the procedure for restoring factory settings. The parameter
main menu.

User Manual 7 LCD
100
NOTE
User.
4. Choose Restore Defaults, and press .
5. On the displayed page, press .
6. Press to complete the settings.
NOTE
After restoring factory settings, the menu is
displayed in English, and then the LCD switch to
the Wizard.
----End

User Manual 7 LCD
101
7.2.14 Cleaning the User Data
This topic describes how to clean the system operating information and the historical alarms
for the SUN2000.
Procedure
 The following table describes the procedure for cleaning the user data. The parameter
main menu.
NOTE
30 seconds. If you exit from the Maintance
page and log in again within 30 seconds, no

User Manual 7 LCD
102
4. Choose Data Clear, and press .
5. On the displayed page, press .
6. Press to complete the operatings.
----End
7.2.15 Enabling the USB Guide Function
This topic describes how to enable the USB guide function to implement firmware upgrade,
configuration importing, data exporting, and configuration exporting functions with the USB
flash drive.
Context
The USB guide functions are described as follows:
 Firmware upgrade: Upgrade the SUN2000 software.
 Configuration importing: Load the existing configuration file to the SUN2000 and
update the configuration parameters in batches (all parameters set on the LCD).
 Data exporting: Download the alarm, performance, log data in the file format to the local
computer to facilitate analysis.

User Manual 7 LCD
103
 Configuration exporting: Download the configuration parameters in the file format to the
local computer.
Procedure
 The following table describes the procedure for enabling the USB guide function. The
main menu.
NOTE
 The user name can be set to Advanced User
30 seconds. If you exit from the Maintenance
page and log in again within 30 seconds, no

User Manual 7 LCD
104
4. Choose USB Expansion, and press .
NOTE
If no USB flash driver is detected, the LCD displays
a message prompting you to insert the USB flash
drive.
5. Select a menu by pressing and ,
and press .
The menus that can be selected include
Firmware Upgrade, Config Import, Config
Export, and Data Export.
 If you want to upgrade the firmware,
perform step 6 only.
 If you want to import the configuration
data, perform step 7 only.
 If you want to export the configuration
data, perform step 8 only.
 If you want to export the alarm data,
performance data, and system log, perform
step 9 only.
6. To confirm the Current is correct, press
.
NOTICE
 Firmware upgrade is allowed only when the
SUN2000 is properly connected to the PV
arrays (the PV connection indicator is green).
 Before upgrading the firmware, download the
upgrade package from
http://support.huawei.com, decompress the
package, and copy the files to the root directory
of the USB flash drive.
7. Press .

User Manual 7 LCD
105
8. After the configuration data is successfully
exported, press .
9. After the data is successfully exported,
press .
----End
7.2.16 Viewing the System Version
This topic describes how to view the SUN2000 version on the monitoring panel.
Procedure
 The following table describes the procedure for viewing the SUN2000 version. The
main menu.

User Manual 7 LCD
106
The version information includes Type,
Model, Version, and SN.
----End

User Manual 8 Maintenance
107
8 Maintenance
This topic describes how to perform daily maintenance and troubleshooting to ensure
long-term proper operation of the SUN2000.
8.1 Powering Off the SUN2000
When maintaining or replacing the SUN2000, comply with the safety precautions and
operation procedure specified in this section.
Context
After shutting down the SUN2000, the remaining electricity and heat may cause electrical
shocks and body burns. Therefore, operate the SUN2000 five minutes later after the
shutdown.
Procedure
 To maintain the SUN2000, perform Step 1 to Step 3. To replace the SUN2000, perform
Step 1 to Step 7.
1. On the liquid crystal display (LCD), send a shutdown command.
For details, see 7.2.12 Enabling Manual Power-On and Power-Off.
You can also run a shutdown command on the EMS. For details, see the NetEco1000S
V100R001C00 User Manual.
2. Disconnect the circuit breaker between the SUN2000 and the power grid.
3. Set DC SWITCH to OFF.
4. Disconnect RS485 communications cables.
5. Disconnect DC input power cables.
For details, see Follow-up Operation in 5.3 Installing DC Input Power Cables.
6. Disconnect AC output power cables.
For details, see Follow-up Operation in 5.2 Connecting AC Output Power Cables.

108
7. Disconnect PGND cables.
For details, see Follow-up Operation in 5.1 Installing PGND Cables.
----End
8.2 Daily Maintenance
This section describes the routine maintenance items and intervals for the SUN2000.
Table 8-1 Maintenance list
Check
Item
Check Method Maintenance
Interval
System
cleaning
Check periodically that the heat sink is free from
dust and being covered.
Semiannual or
annual
System
running
status
 Check that the SUN2000 is not damaged or
deformed.
 Check that the running sound of the SUN2000 is
normal.
 During the running, check that all SUN2000
parameters are correctly set.
Semiannual
Electrical
Connection
 Check that cables are secured.
 Check that cables are intact and especially the
parts touching the metallic surface is not
scratched.
 Check that the idle RS485 and USB ports are
locked by waterproof caps.
The first inspection is
half a year after the
initial
commissioning.
From then on, the
interval can be
semiannual or
annual.
Grounding
reliability
Check that ground cables are secured. The first inspection is
half a year after the
initial
commissioning.
From then on, the
interval can be
semiannual or
annual.
Before wiping the heat sink, ensure that the DC SWITCH is OFF and the circuit breaker between the
SUN2000 and the power grid is disconnected. Wait at least for 5 minutes before wiping the heat sink.
8.3 Common Faults and Troubleshooting Measures
This topic describes the common faults and troubleshooting measures for the SUN2000.

109
The alarm severity is defined as follows:
 Major: The SUN2000 enters the shutdown mode and disconnects from the power grid to
stop generating electricity after a fault occurs.
 Minor: Some components are faulty but the SUN2000 can still generate electricity.
 Warning: The SUN2000 output power decreases due to external factors.
For details, see Table 8-2.
Table 8-2 Rectifying common faults
Alarm
ID
Alarm
Name
Alarm
Severity
Causes Measures
103 DC Over
Voltage
Major Too many PV modules
connected in series lead to
excessively high output
voltage of PV arrays,
making the open circuit
voltage of the PV arrays
greater than the maximum
input voltage of the
SUN2000.
Check whether the large number of PV
modules connected in series make the
open circuit voltage of the PV arrays
greater than the maximum input
voltage of the SUN2000. If yes, adjust
the number of PV arrays connected in
series to decrease the output voltage of
PV arrays to meet the voltage
requirements for the SUN2000. If no,
contact Huawei technical support.
After the adjustment, ensure that the
SUN2000 works properly.
106 to
111
String 1-6
Abnormal
Warning  PV arrays are shielded
for a long time.
 PV arrays deteriorate.
1. Check whether the output current of
a PV array is obviously less than
the output current of other PV
arrays.
2. If yes, check whether the PV array
is shielded.
3. If the PV array is clear and is not
shielded, check whether the PV
modules are faulty.
120 to
125
String 1-6
Reverse
Warning The cables between PV
arrays are connected
reversely during SUN2000
installation.
Check whether the cables between PV
arrays are connected reversely. If they
are connected reversely, reconnect the
cables properly.

110
Alarm
ID
Alarm
Name
Alarm
Severity
Causes Measures
200 DC Bus
Voltage
Fault
Major Abnormal external
conditions trigger the
protection for the DC
circuit inside the
SUN2000. The possible
causes are as follows:
 Reason ID = 3
The inverter input is
suddenly disconnected,
or the PV array to be
obstructed result in a
sharp change in output
power.
 Reason ID = 9 or 11
The sharp change of
grid voltage cause
inverter input energy
short period of time can
not be vented so that the
internal voltage
increases.
 Reason ID = 10
The imbalance of grid
phase voltage lead to
the inverter internal
control circuit short
keep up with changes
and protection.
1. The SUN2000 detects its external
working conditions in real time, and
therefore the SUN2000
automatically recovers to the
normal operating status after the
fault is rectified.
2. If the alarm occurs repeatedly,

111
Alarm
ID
Alarm
Name
Alarm
Severity
Causes Measures
202 Invert
Module
Fault
Major Abnormal external
conditions cause the
protection for the inversion
circuit inside the
SUN2000. The possible
causes are as follows:
 Reason ID = 4
The grid voltage sharp
reduced or short-circuit,
resulting in the inverter
output current is too
large.
 Reason ID = 13
resulting in the inverter
internal voltage
detection circuit failure.
 Reason ID = 14
resulting in
instantaneous output
current of the inverter is
too large.
 Reason ID = 16
The DC current of grid
current exceeds the
allowable range.
 Reason ID = 17
Grid voltage or
frequency is abnormal.
 Reason ID = 20
The inverter output
short-circuit led to a
sharp increase in output
current.
Reason ID = 4, 13, 14, 16, or 17
fault is rectified.
Reason ID = 20
1. Check whether the inverter output
cable is short-circuit.

112
Alarm
ID
Alarm
Name
Alarm
Severity
Causes Measures
301 Grid
Voltage
Abnormal
Major The voltage of the power
grid is beyond the
acceptable range. The
possible causes are as
follows:
 Reason ID = 1 to 6
The grid A, B, or C
phase voltage is less
than the allowable
range.
 Reason ID = 13 to 18
The grid A, B, or C
phase voltage is higher
than the allowable
range.
 Reason ID = 26
The grid voltage is
higher than the
allowable range.
 Reason ID = 27 or 28
The grid voltage
three-phase voltage is
difference.
 Reason ID = 29
Power outage, or the
AC line or the AC
circuit breaker is
disconnected.
Reason ID = 1 to 6
1. If the alarm occurs accidentally, the
possible cause is that a power grid
is abnormal accidentally. The
SUN2000 automatically recovers to
the normal operating status after the
fault is rectified.
2. If this alarm occurs repeatedly,
check whether voltage of the power
grid is within the acceptable range.
If no, contact the local power
operator. If yes, change the power
grid overvoltage and undervoltage
protection points after obtaining
approval from the local power
operator. For details about how to
change the points, see 7.2.9 Setting
Protection Parameters.
3. If the fault persists for a long time,
check the AC circuit breaker and
output cable of the SUN2000.
Reason ID = 13 to 18, or 26
1. Check whether the feed grid point
voltage is too high, if it is, contact
your local power operators.
2. If confirm feed grid point voltage is
higher than the permissible scope of
consent and the consent of the local
power operators, modify the
undervoltage protection point.
3. Check whether the grid voltage
peak is too high.
Reason ID = 27 or 28
fault is rectified.
2. If the alarm is repeated, affect the
normal power generation of the
power plant, please contact the
local power operators.
Reason ID = 29
1. Check whether the AC voltage is
normal.
2. Check whether the AC line or
circuit breaker is disconnected.

113
Alarm
ID
Alarm
Name
Alarm
Severity
Causes Measures
305 Frequency
Abnormal
Major The actual frequency of the
grid is higher than the local
grid standards
requirements.
1. If the alarm occurs accidentally, the
possible cause is that a power grid
is abnormal accidentally. The
SUN2000 automatically recovers to
the normal operating status after the
fault is rectified.
2. If this alarm occurs repeatedly,
check whether frequency of the
power grid is within the acceptable
range. If no, contact the local power
operator. If yes, change the power
grid overfrequency and
underfrequency protection points
after obtaining approval from the
local power operator. For details
about how to change the points, see
7.2.9 Setting Protection Parameters.
313 Low
Array
Insulation
Resistance
Major The insulation resistance
against the ground for PV
arrays is less than the
minimum value. The
possible causes are as
follows:
 The ground cable for
the PV arrays is
short-circuited.
 PV arrays are installed
in a long-term moist
environment.
1. Check the insulation resistance
against the ground for the outputs
of PV arrays. If a short circuit
occurs, rectify the fault.
2. If the insulation resistance against
the ground is less than the default
value in a rainy environment, set
the insulation resistance threshold.
For details, see 7.2.9 Setting
Protection Parameters.
318 Residual
Current
Abnormal
Major The insulation resistance
against the ground at the
input side becomes lower
in operating mode, which
causes excessively high
residual current.
1. If the fault occurs accidentally, the
possible cause is that the external
circuits are abnormal accidentally.
The SUN2000 automatically
recovers to the normal operating
status after the fault is rectified.
2. If the fault occurs repeatedly and
lasts a long time, check the
insulation resistance against the
ground of PC arrays is excessively
low.
321 Cabinet
Over-Tem
p
Major 1. The inverter installation
location is not well
ventilated.
2. The environment
temperature is too high.
3. The internal fan is not
working.
Check whether the operating
temperature of the UNS2000 exceeds
the upper limit. If yes, improve
ventilation to decrease the temperature.

114
Alarm
ID
Alarm
Name
Alarm
Severity
Causes Measures
326 Electrical
Grounding
Fault
Major  The neutral wire and
ground cable are not
connected to the
SUN2000.
 When you ground PV
arrays, the isolation
transformer is not
connected to the
SUN2000 at the output
side.
1. Check that the neutral wire and
ground cable are properly
connected.
2. When PV arrays are grounded,
check whether the SUN2000 needs
to connect to an isolation
transformer at the output side. If
yes, connect the transformer to the
SUN2000.
400 System
Fault
Major An unrecoverable fault
occurs on a circuit inside
the SUN2000.
Flip the DC switch on the SUN2000 to
OFF, wait for 5 minutes, and flip the
DC switch to ON. Check whether the
fault is rectified. If no, contact Huawei
technical support.
502 Internal
Communi
cation
Fault
Minor  The communication
circuit of the inverter is
disturbed.
 The communication
circuit is damaged.
 The establishment
internal communication
address is error.
1. If the fault is caused by short circuit
of the communications circuit
inside the SUN2000, the SUN2000
fault is rectified.
2. If the fault cannot be rectified for a
long time, contact Huawei technical
support.
504 Version
Mismatch
Minor During software upgrade of
the SUN2000, the version
of the software loaded is
incorrect.
Check whether you have performed a
software upgrade recently. If yes,
upgrade the software to the correct
version again.
505 Firmware
Upgrade
Failed
Major Upgrade is not completed
normally.
Upgrade again.
61440 Flash
Fault
Minor  Lack of Flash space.
 Bad blocks is in Flash.
There is a problem in
device.
1. Replace monitor board.
2. If the monitor board and equipment
are one, replace the entire monitor
equipment.
If you cannot rectify faults with the measures listed in Table 8-2, contact Huawei technical support.

User Manual 9 Inverter-Associated Operations
115
9 Inverter-Associated Operations
This topic describes how to remove, pack, and dispose the SUN2000.
9.1 Removing the SUN2000
This topic describes how to remove the SUN2000.
Perform the following operations before removing the SUN2000:
1. Disconnect all cables from the SUN2000, including RS485 communications cables, DC
input power cables, AC output power cables, and protection ground (PGND) cables.
For details, see 8.1 Powering Off the SUN2000.
2. Optional: Open the anti-theft lock at the bottom of the SUN2000.
3. Remove the SUN2000 from the rear panel.
4. Remove the rear panel.
9.2 Packing the SUN2000
This topic describes how to pack the SUN2000.
 If the original packing materials are available, put the SUN2000 inside them and then
seal them by using adhesive tape.
 If the original packing materials are not available, put the SUN2000 inside a suitable
hard carton and seal them properly.
9.3 Disposing the SUN2000
This topic describes how to dispose the SUN2000.
If the SUN2000 service life expires, dispose the SUN2000 according to the local rules about
disposing electrical equipment waste, or return the SUN2000 to Huawei. Customers pay the
expenses for disposing the SUN2000.

User Manual 10 Technical Specifications
116
10 Technical Specifications
This topic lists the technical specifications for all SUN2000 models.
Efficiency
Technical
Specifications
SUN2000
-8KTL
SUN2000
-10KTL
SUN2000
-12KTL
SUN2000
-15KTL
SUN2000
-17KTL
SUN2000
-20KTL
SUN2000
-23KTL
SUN2000
-28KTL
Max. efficiency 98.50% 98.60% 98.70%
European
efficiency
98.00% 98.30% 98.40%
Input
Technical
Specifications
SUN2000
-8KTL
SUN2000
-10KTL
SUN2000
-12KTL
SUN2000
-15KTL
SUN2000
-17KTL
SUN2000
-20KTL
SUN2000
-23KTL
SUN2000
-28KTL
Max DC
power(cosφ=1)
9,100 W 11,400 W 13,700 W 17,100 W 19,200 W 22,500 W 23,600 W 28,200 W
Max.input
voltage
1000 V
Max.input
current per
MPPT
18 A
Max.short circuit
current per
MPPT
25 A
Max.input
current (3
MPPTs)
54 A
Min. operating
voltage
200 V

117
Technical
Specifications
SUN2000
-8KTL
SUN2000
-10KTL
SUN2000
-12KTL
SUN2000
-15KTL
SUN2000
-17KTL
SUN2000
-20KTL
SUN2000
-23KTL
SUN2000
-28KTL
MPP voltage
range
320 V–800 V
380
V–800 V
400 V–800 V 480 V–800 V
Rated input
voltage
620 V
Max. number of
inputs
4 6
Number of MPP
trackers
2a
3b
a: 2 MPPTs can work independently or work in parallel.
b: 3 MPPTs can work independently, or work in parallel, or any 2 of 3 MPPTs work in
parallel.
Output
Technical
Specifications
SUN2000
-8KTL
SUN2000
-10KTL
SUN2000
-12KTL
SUN2000
-15KTL
SUN2000
-17KTL
SUN2000
-20KTL
SUN2000
-23KTL
SUN2000
-28KTL
Rated power(230
V, 50 Hz)
8,000 VA 10,000 VA 12,000 VA 15,000 VA 17,000 VA 20,000 VA 23,000 VA 27,500 VA
Max. AC output
power (cosφ=1)
8,800 W 11,000 W 13,200 W 16,500 W 18,700 W 22,000 W - -
Rated output
voltage 220 V - 230 V / 380 V - 400 V, 3W + N + PE
277 V / 480
V, 3W +
PE
AC power
frequency
50 Hz/60 Hz
Max.output
current
12.8 A 16 A 19.2 A 24 A 27.2 A 32 A 33.5 A 33.5 A
Power factor 0.8 overexcited … 0.8 underexcited
Max.total
harmonic
distortion
< 3%
AC connected
Inrush current
(Peak /
Duration)
33 A / 2 ms
Max. output
short current
(Peak /
Duration)
400 A / 110 ms

118
Protection
Technical
Specifications
SUN2000
-8KTL
SUN2000
-10KTL
SUN2000
-12KTL
SUN2000
-15KTL
SUN2000
-17KTL
SUN2000
-20KTL
SUN2000
-23KTL
SUN2000
-28KTL
Input-side
disconnection
device
Yes
Anti-islanding
protection
Yes
AC over current
protection
Yes
DC
reverse-polarity
protection
Yes
PV array string
fault monitoring
Yes
DC surge
arresters
Class II
AC surge
arresters
Class III
Insulation
monitoring
Yes
Residual current
detection
Yes
Display and Communication
Technical
Specifications
SUN2000
-8KTL
SUN2000
-10KTL
SUN2000
-12KTL
SUN2000
-15KTL
SUN2000
-17KTL
SUN2000
-20KTL
SUN2000
-23KTL
SUN2000
-28KTL
Display Graphical LCD
RS485 Yes
USB Yes
General Data
Technical
Specifications
SUN2000
-8KTL
SUN2000
-10KTL
SUN2000
-12KTL
SUN2000
-15KTL
SUN2000
-17KTL
SUN2000
-20KTL
SUN2000
-23KTL
SUN2000
-28KTL

119
Technical
Specifications
SUN2000
-8KTL
SUN2000
-10KTL
SUN2000
-12KTL
SUN2000
-15KTL
SUN2000
-17KTL
SUN2000
-20KTL
SUN2000
-23KTL
SUN2000
-28KTL
Dimensions (W
x H x D)
520 mm x 610 mm x 255 mm (20.5 in. x 24.0 in. x 10.0 in.)
Weight 40 kg 48 kg
Operating
temperature
range
–25°C to +60°C (–13°F to +140°F)
Cooling Natural convection
Operating
altitude
3000 m (9842.4 ft.)
Relative
humidity
(non-condensing
)
0%–100%
DC connector Amphenol H4
AC connector Amphenol C16/3
Degree of
protection
IP65
Protective Class Class I
Degree of
pollution
III
Self-consumptio
n at night
< 1 W
Topology Transformerless
Noise ≤ 29 dB
Warranty 5 years
Standards Compliance
Technical
Specifications
SUN2000
-8KTL
SUN2000
-10KTL
SUN2000
-12KTL
SUN2000
-15KTL
SUN2000
-17KTL
SUN2000
-20KTL
SUN2000
-23KTL
SUN2000
-28KTL
Safety/EMC EN/IEC62109-1, EN/IEC62109-2, EN61000-6-2, EN61000-6-3, EN61000-3-2, EN61000-3-3,
EN61000-3-11, EN61000-3-12
Grid code VDE-AR-N4105, VDE0126-1-1, BDEW 2008, CEI 0-21, CEI 0-16, G59/2, G83/2,
AS4777, CGC/GF004:2011, IEC61727, IEC62116, EN50438, MEA 2013, PEA 2013

User Manual 11 Quality Assurance
120
11 Quality Assurance
Warranty
During the warranty period, the user should provide the invoice and date. The signs on the
products should be clear. Otherwise, Huawei will not be liable for the quality assurance. The
warranty period of this product is 60 months after it is unpacked and accepted. The start time
must be within 30 days after the delivery date. The contract prevails if it specifies the
warranty.
Quality Assurance Regulations
 Huawei maintains or replaces the equipment freely if the equipment becomes faulty
within the warranty period.
 Return the faulty or damaged equipment to Huawei.
Disclaimer
 Damage caused during transportation.
 Incorrect installation.
 Misoperation.
 Damage caused by abnormal natural environments.
 Operation under severe environments which are not specified in this document.
 Unauthorized product changes and software code modification.
 Usage under installation and operating environments which are not specified in related
international specifications.
 Ignorance of the safety precautions and regulations specified in this document.

User Manual AAbbreviation
121
A Abbreviation
A
ACDU AC Distribution Module
E Element Management System
EMI Electromagnetic Interference
EMS
L
LCD Liquid Crystal Display
LED Light Emitting Diode
M
MMP Maximum Power Point
MPPT Maximum Power Point Tracking
P
PE Protective Earthing
PGND Protection Ground
PV Photovoltaic
S
SPD Surge Protection Device

User Manual B Power Grid Standard Codes
122
B Power Grid Standard Codes
This topic describes how to set the power grid standard code based on the standards of the
country or region where the power station locates.
Table B-1 Power Grid Standard Codes
No. Power grid standard code Description
1 VDE-AR-N-4105 Germany low-voltage power grid
2 CGC/GF004:2011 China golden sun low-voltage power grid
3 UTE C 15-712-1(A) France continent
4 UTE C 15-712-1(B) France island 50 Hz
5 UTE C 15-712-1(C) France island 60 Hz
6 VDE 0126-1-1-BU Bulgaria
7 BDEW-MV Germany medium-voltage power grid
8 G59-England England 230 V power grid (I>16 A)
9 G59-Scotland Scotland 240 V power grid (I>16 A)
10 G83-England England 230 V power grid (I<16 A)
11 G83-Scotland Scotland 240 V power grid (I<16 A)
12 CEI0-21 Italy low-voltage power grid
13 IEC61727 India
14 CEI0-16 Italy medium-voltage power grid
15 CHINA-MV480 China medium-voltage power grid (no neutral
wires for 28 kW systems)
16 TAI-PEA Thailand 220 V
17 TAI-MEA Thailand 230 V
18 BDEW-MV480 Germany medium-voltage power grid (no
neutral wires for 28 kW systems)

User Manual B Power Grid Standard Codes
123
No. Power grid standard code Description
19 G59-MV UK 480 V medium-voltage grid-tied (I>16 A)
20 IEC61727-MV IEC61727 medium-voltage grid-tied
21 UTE C 15-712-1-MV France 480 V medium-voltage power grid
22 TAI-PEA-MV Thailand medium-voltage grid-tied PEA
23 TAI-MEA-MV Thailand medium-voltage grid-tied MEA
24 EN 50438-DK Denmark medium-voltage grid-tied
25 Japan (50 Hz) Japan 50 Hz
26 Japan (60 Hz) Japan 60 Hz
27 EN50438-Turkey-MV Turkey medium-voltage power grid
28 EN50439-Turkey Turkey low-voltage power grid
29 C10/11 Belgium
30 C10/11-MV Belgium medium-voltage power grid
31 EN50438Y2007-NL Netherlands

Sun2000 (8 ktl 28ktl) user manual 07

More Related Content

What's hot (11)

Similar to Sun2000 (8 ktl 28ktl) user manual 07 (20)

Recently uploaded (20)

Sun2000 (8 ktl 28ktl) user manual 07