Hopewind hopeSun Series User manual

hopeSun Series
String Inverter
(8KTL~33KTL)
User Manual
Version: V1.0
Thank you for purchasing products developed and manufactured by Shenzhen Hopewind
Technology Co., Ltd. (hereinafter referred to as “Hopewind”). Hope our products and this manual
can meet your demands. Any suggestion for improvement shall be appreciated.
Shenzhen Hopewind Technology Co., Ltd. reserves the copyright of this manual, and it shall be
subject to change without any further notice.

About this manual
For Readers
This manual is helpful for technicians who install, debug, operate and maintain string inverters of
Hopewind. Please read this manual carefully before operates the product.
Readers are required to know the basic knowledge about electric components, wiring, signs and
mechanical drawings.
Outlines
Chapter
Contents
1 Safety Precautions
This chapter describes the safety precautions when transporting, storing, installing,
running and maintaining the Inverter.
2 Product Description
This chapter describes the basic principles, naming rules, product configuration and
data.
3 System Installation
This chapter describes the unpacking inspection, installation tools, installation
environment, reserved space, fixing method, cable connection.
4 Commissioning
Guide
This chapter describes the inspection before startup, Commissioning and startup of
string inverter.
5 Maintenance and
Troubleshooting
This chapter describes the daily maintenance methods, maintenance intervals and
troubleshooting of the product.
6 Inverter handling
Guide
This chapter describes the basic requirements and precautions when disassembling,
replacing, and scrapping the inverter.
Warning Signs in This Manual
It shows that there is a significant potential danger. If the operation is not performed
according to requirements, serious injury or damage may be caused to people or
equipment.
It shows that there is a general potential danger. If the operation is not performed
according to requirements, general injury or damage may be caused to people or
equipment.
It shows that there is a general potential danger. If the operation is not performed
according to requirements, general injury or damage may be caused to equipment.
Terms and Abbreviations
Terms/Abbreviations
Description
MPPT
Maximum Power Point Tracking
Photovoltaic string
Multiple solar cell arrays in parallel or series.
EEPROM
Electrically Erasable Programmable Read-Only Memory
hopeInsight
A monitoring and debugging software for inverter.
Version Description
Version
Release Date
Description
V1.0
2021-8-5
The first version

Content
About this manual........................................................................................................................... 5
1 Safety Precautions.......................................................................................................................1
1.1 Transportation.....................................................................................................................................1
1.2 Storage................................................................................................................................................ 1
1.3 Installation........................................................................................................................................... 2
1.4 Operation.............................................................................................................................................2
1.5 Maintenance....................................................................................................................................... 3
2 Product Description.................................................................................................................... 5
2.1 Product Description........................................................................................................................... 5
2.1.1 Schematic Diagram......................................................................................................................... 5
2.1.2 Operation Mode............................................................................................................................... 6
2.2 System Configuration and Application............................................................................................6
2.2.1 Application Description....................................................................................................................6
2.2.2 Supported Grid Form...................................................................................................................... 7
2.3 Naming Rules..................................................................................................................................... 7
2.4 Nameplate label................................................................................................................................. 8
2.5 Machine Configuration...................................................................................................................... 9
2.6 Signs and labels...............................................................................................................................11
2.7 Warning Labels in Inverter..............................................................................................................11
2.8 Technical Data..................................................................................................................................12
2.9 Mechanical Parameters.................................................................................................................. 14
2.10 Ambient Requirements................................................................................................................. 14
3 System installation.................................................................................................................... 17
3.1 Unpack and inspection....................................................................................................................17
3.2 Preparation of installation tools..................................................................................................... 17
3.3 Installation environment requirements......................................................................................... 17
3.4 Requirements for reserved space.................................................................................................18
3.5 Fixing method...................................................................................................................................19
3.6 Electrical connection....................................................................................................................... 20
3.6.1 Cable requirements.......................................................................................................................20
3.6.2 Recommended cable specifications...........................................................................................20
3.6.3 Torque requirements..................................................................................................................... 21
3.6.4 Preparation before operation.......................................................................................................21
3.6.5 Connect the ground wire.............................................................................................................. 22
3.6.6 Connect the AC output cable.......................................................................................................22
3.6.7 Connect the communication cable............................................................................................. 24
3.6.8 Connect DC input cables............................................................................................................. 25
4 Commissioning Guide.............................................................................................................. 27
4.1 Check before starting......................................................................................................................27
4.2 Power on the system.......................................................................................................................28
4.3 Power off the system.......................................................................................................................28
5 Maintenance and troubleshooting........................................................................................ 29
5.1 Maintenance items and cycle........................................................................................................ 29
5.2 Troubleshooting................................................................................................................................30
6 Inverter handling instructions................................................................................................ 35
6.1 Disassembly of the inverter............................................................................................................35
6.2 Replace the inverter........................................................................................................................ 35
6.3 Package the inverter....................................................................................................................... 35
6.4 Scrapped the inverter......................................................................................................................35

1
1Safety Precautions
This chapter describes the safety precautions to be observed during the installation, operation
and maintenance of inverter. Please carefully read the safety precautions before the installation,
maintenance and other operations of inverter. All personals must strictly observe safety
precautions during the operation. Personal injury or damage to inverter and associate devices
may occur if the safety precautions are ignored.
When operating the inverter, please pay particular attention to the following items:
1. Only qualified professionals can install, operate and maintain the inverter.
2. Please avoid toppling and knocking the inverter cabinet during moving the inverter.
3. Prevent liquid, debris or chippings from getting inside the inverter; a conductive fluid and debris may cause
an internal short circuit of inverter and result in equipment damage.
4. Before completing installation and maintenance, the inverter must be isolated from power grid and other
electrified devices.
5. Please make sure that relevant protective measures have been taken to avoid electric shock, fire or other
accidents.
Don't place explosive and inflammable substances around the inverter!
1.1 Transportation
1. Please keep the inverter well packed and upward, avoid strong shock or collision during the transportation.
2. Please transport the inverter with package and operate in accordance with the signs and labels during the
transportation. Please refer to "2.6 Signs and labels" for detailed information.
3. Please ensure the transportation environment can meet the requirements. Please refer to "2.10 Ambient
Requirements" for detailed information.
1.2 Storage
The storage environment of inverter should meet the corresponding requirements. Please refer to "2.10
Ambient Requirements" for detailed information.
About long-term storage:
Before or after the installation, it's regarded as long-term storage if the inverter has been in the no power
supply status for over three weeks. Please pay attention to the following issues about long-term storage:
Put the desiccant into several equipment cabinets and pack the inverter with packaging materials;
Attention must be paid to ventilation and moisture prevention where equipment is stored and any water is
strictly prohibited;
Necessary measures must be taken to deal with adverse environments, such as abrupt cooling and
heating, collision and dust storm to prevent damages to the inverter.
Regular inspection at least once a week, inspect whether the package is intact and prevent it from
damages caused by insects and rats. Please replace the damaged package immediately.
The inverter shall be unpacked, inspected, repacked, and replace the new desiccant if it is stored for over

User Manual of String Inverter
2
half a year.
Don't store the inverter without package.
1.3 Installation
1. The DC switch and breaker of the inverter must be cut off and the inverter shell must be reliably grounded
before any operation is conducted inside the inverter.
2. The inverter must be grounded canonically and the dimension of grounding conductor must conform to the
requirements of security specifications to ensure the personal safety.
3. Don't place explosive and inflammable substances around the inverter.
1. The installation environment of the inverter must have good ventilation and heat dissipation, the inverter
can’t expose to the sunlight directly.
2. It's advised to fix the inverter by four personals to avoid mechanical injury. Please take safety measures to
prevent injury during installation.
3. Liquid, dust or debris must be prevented from entering the inverter during installation and maintenance as
conducting liquid and debris may cause short circuit inside the inverter, thus damaging the equipment.
4. Please ensure the installing torque of power cable is proper during the wiring of external cables and
inverter, excessive torque will damage the screw, and too small torque will increase the contact resistance
and result in overheating.
5. The terminal of the power cable connected with the inverter must comply with national standard as
substandard terminal or disqualified construction may lead to overheating of the power cable and outbreak
of fire in severe cases.
6. Installation place must meet the operation environment requirements. Please refer to "2.10 Ambient
Requirements" for detailed information.
1.4 Operation
1. During the operation of inverter, the cabinet door of inverter needs to be locked to avoid electric shock and
other personnel injuries, which can also prevent salinity, water, dust or other conducting materials in the air
from entering into inverter.
2. Please keep the surrounding environment of operating inverter non-corrosive.
3. Don't place explosive and inflammable substances within two meters from the inverter.
4. Don't touch the internal board, components, cables and terminal blocks of inverter during the powering on.
5. When there are faults or abnormal smell or sound, turn off the DC switch and open the breaker of AC side
immediately.
1. Power on the inverter only after completing the installation and properly connecting the cables.
2. Do not conduct any insulation resistance test or high-voltage resistance test for inverter, because wrong
test may cause damages to inverter.
3. Cut off wiring between inverter and external equipment when conducting insulation and voltage resistance
test for external equipment.

1 Safety Precautions
3
1.5 Maintenance
c
1. Please cut off the AC side breaker first, then cut off the DC switch, and wait for at least 5 minutes before
performing maintenance.
2. Please prevent irrelevant personals from entering maintenance scene during the maintenance.
3. Please maintain the inverter under the condition of understanding this manual and being equipped with
proper tools and test devices.
4. Please wear insulating gloves and safety shoes for you safety.
Regular check and maintenance must be performed, please refer to "5 Maintenance and troubleshooting" for
details.
--Chapter End--

5
2Product Description
2.1 Product Description
hopeSun series three-phase string on-grid inverter is independent developed by Hopewind.
it's main function is converting DC current generated by PV arrays into AC current and feeding it
into the grid.
hopeSun 8KTL/10KTL/12KTL are 2-input string inverters. hopeSun 15KTL/17KTL are 3-input
string inverters. hopeSun 20KTL/22KTL/25KTL are 4-input string inverters. hopeSun
30KTL/33KTL are 6-input string inverters. These products only suit for 400VAC low-voltage
grid-connected scenarios, such as village-level photovoltaic power stations below 400KW or
industrial and commercial rooftop photovoltaic power stations.
2.1.1 Schematic Diagram
hopeSun 8KTL/10KTL/12KTL are connected to the inverter through 2 PV string inputs.
hopeSun 15KTL/17KTL are connected to the inverter through 3 PV string inputs. hopeSun
20KTL/22KTL/25KTL are connected through 4 PV string inputs In the inverter. hopeSun
30KTL/33KTL are connected to the inverter through 6 PV string inputs. There are 2 MPPT circuits
inside the inverter for MPPT tracking of the strings, and then the inverter circuit realizes DC
conversion to three-phase Alternating current as he schematic diagram below.
Figure 2-1 Two-input string inverter system schematic diagram
Figure 2-2 Three-input string inverter system schematic diagram
Figure 2-3 Four-input string inverter system schematic diagram
Figure 2-4 Six-input string inverter system schematic diagram

User Manual of String Inverter
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2.1.2 Operation Mode
hopeSunHV string inverter includes three operation modes: standby mode, operation mode
and shutdown mode. The three mode switching conditions are shown in Figure 2-5.
Figure 2-5 hopeSun string inverter operation mode
Operation Mode
Description
Standby
1) Standby mode mainly refers to the external environment doesn't meet the operation
condition, such as insufficient sunshine or DC switch is turned off. Under this mode, the
inverter continuously performs self-checking and enters operation mode once the
operation conditions are satisfied.
2) Under standby mode, the inverter will enter shutdown mode after detecting the
shutdown command or faults.
Operation
1) Under the operation mode, the inverter converts DC current of photovoltaic arrays into
AC current and feeds it to the grid. The inverter performs MPPT arithmetic and outputs
the maximum power of photovoltaic arrays.
2) The inverter will enter shutdown mode after detecting the faults or shutdown
command.
3) The inverter will enter standby mode after detecting the input power of photovoltaic
arrays is lower than the on-grid power generation condition.
Shutdown
1) If the inverter detects a fault occurrence or shutdown command during standby or
operation mode, it enters shutdown mode.
2) In the shutdown mode, if the inverter detects that the fault has been cleared or the
power-on command, it enters standby mode.
2.2 System Configuration and Application
2.2.1 Application Description
Figure 2-6 shows the application diagram of the string inverter network, Figure 2-7 shows the
design scheme of the distributed PV power plant.
Figure 2-6 Application diagram of the string inverter network

2 Product Description
7
Figure 2-7 Design scheme of the l distributed PV power plant
2.2.2 Supported Grid Form
hopeSun 8KTL~hopeSun 33KTL support the TN-S, TN-C, TN-C-S,TT IT systems in Figure
2-8.
Figure 2-8 Schematic diagram of IT system
2.3 Naming Rules
Figure 2-9 Naming rules