Senergy 6K User manual

6-15K
Ver. 01

Contents
Forward
Application Model
Intended Audience
Symbol Conventions
1 Safety Precautions
1.1 Personnel Safety
1.2 The PV Inverter Protection
1.3 Installation Safety
1.4 Electrical Connections
1.5 Operating and Commissioning
1.6 Maintenance
1.7 Additional Information
2 Overview of the Inverter
2.1 Functional Models
2.2 Network Application
2.3 Outline and Dimensions
2.4 Working Process
2.5 Working Modes
2.1.1 Function
2.1.2 Model Description
2.3.1 Dimensions
2.4.1 Basic principle Description
2.3.2 Outline
2.4.2 Circuit Diagrams
2.2.1 Grid-tied PV Power Systems
4.1 Checking the Outer Packing
4.2 Moving the inverter
4.3 Identify the PV Inverter
3 Storage
4 Installation
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4.3.1 Nameplate
4.3.2 Compliance and Safety Symbols
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5 Electrical Connections
5.1 Connecting Protection Ground (PGND) Cables
5.2 Connecting AC Output Cables
5.3 Connecting the PV Strings
5.4 Connecting Communications Cables
5.5 Installation Verification
5.1.1 Preparation
5.1.2 Wiring Procedures
5.4.1 Communications Mode Description
5.4.2 Connecting RS485 Communications Cables
5.4.3 Setting RS485 Communications Address
5.3.1 Preparation
5.2.1 Preparation
5.2.2 Procedure of Connecting AC Cables
6 System Operation
6.1 Powering ON the Inverter
6.2 Powering OFF the Inverter
7 User Interface
8 Maintenance
10 Disposal of the Inverter
11 Technical Specifications
8.1 Routine Maintenance
8.2 Inverter warning and exception handling
8.3 Removing the Inverter
9 Quality Guarantee
9.1 Quality Terms
9.2 Liability Waiver
4.5 Wall-mounting the Inverter
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4.4.1 Determining the Installation Position
4.4.2 Installation Mode Requirements
4.4 Installation Requirements 14

1
Forward
Dear User,
Thank you so much for your choosing 6K-15K, the latest generation of grid-tied PV Strings
inverter (hereinafter referred to as the inverter) designed and developed by Senergytec.
This user manual introduces the inverter in terms of its installation, electrical connections,
operation, commissioning, maintenance, and troubleshooting. Please read through the manual
carefully before installing and using the inverter, and keep the manual well for future reference.
Grid-tied PV string inverter
6K/8K/10K
12K/15K
Application Model
This user manual is intended for photovoltaic (PV) inverter operating personnel and qualified
electrical technicians.
Intended Audience
This user manual is subject to change (specific please in kind prevail) without prior notice.
The latest version of user manual and other more information about the product are
available from http://www.senergytec.com, and/or by consulting your dealer.
Notes:

2
Indicates an imminently hazardous situation which, if not correctly
followed, will result in serious injury or death.
Indicates a potentially hazardous situation which, if not correctly
followed, could result in serious injury or death.
Indicates a potentially hazardous situation which, if not correctly
followed, could result in moderate or minor injury.
Indicates a potentially hazardous situation which, if not correctly
followed, could result in equipment failure to run, or property damage.
Calls attention to important information, best practices and tips:
supplement additional safety instructions for your better use of the
PV inverter to reduce the waste of your resource.
Refer to documentation (Remind operators to refer to the
documentation shipped with the inverter).
Symbol Conventions
Safety symbols used in this manual, which highlight potential safety risks and important safety
information, are listed as follows:
Symbol Description
WARNING
CAUTION
DANGER
NOTICE
NOTE

3
1 Safety Precautions
Before beginning your journey, please read these safety precautions in User Manual carefully.
a. The PV inverter must be installed, electronically connected, operated and maintained through
specially trained technician;
b. The qualified technician must be familiar with the safety regulations of electrical system,
working process of PV power generation system, and standards of local power grid;
c. The technician must read through this User Manual carefully and master it before any operation.
1.1 Personnel Safety
a. Do not tamper with any warning signs on the inverter enclosure because these signs contain
important information about safe operation.
b. Do not remove or damage the nameplate on the inverter’s enclosure because it contains
important product information.
c. Do not remove the anti-dismantle label on the inverter’s enclosure because it is the basis for
product warranty.
1.2 The PV Inverter Protection
a. Ensure there is no electronical connections around ports of the PV inverter before installing;
b. Adequate ventilation must be provided for inverter installation location. Mount the inverter in
vertical direction, and ensure that no object is put on the heat sink affecting the cooling. (For
details, refer to Chapter 4 Installation)
1.3 Installation Safety
As soon as receiving the PV inverter, please check if it is damaged
during its transportation. If yes, please contact your dealer immediately.
Please read the User Manual carefully before installing the PV inverter;
warranty or liability will be void from Senergy if damage is caused by
installation faults.
NOTICE
NOTICE

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a. Input terminals of the PV inverter apply only to input terminals of PV String; do not connect
any other DC source to the input terminals.
b. Before connecting PV modules, ensure that is its voltage is within the safe range; when
exposed to any sunlight, PV modules can generate high voltage.
c. All electrical connections must meet the electrical standards of the country or region.
d. Cables used in electrical connections must be well fixed, good insulation, and with
appropriate specification.
1.4 Electrical Connections
a. Before getting the permission of electrical power sector in the country / region, the grid-tied
PV inverter cannot start generate power.
b. Follow the procedures of commissioning described in the user manual when commissioning
the PV inverter.
c. Do not touch any other parts'surface except the DC switch when the PV inverter is operating;
its partial parts will be extremely hot and can cause burns.
1.5 Operating and Commissioning
1.6 Maintenance
Before installing the inverter, check all electrical ports to ensure no
damage and no short circuit. Otherwise personal casualty and/or fire
will occur.
While the inverter operating, high voltage can lead to an electrical
shock hazard, and even cause personal casualties. Therefore,
operate the PV inverter strictly according to the safety precautions in
the user manual.
Power OFF all electrical terminals before the inverter maintenance;
strictly comply with the safety precautions in this document when
operating the inverter.
DANGER
DANGER
DANGER

5
a. For personal safety, maintenance personnel must wear appropriate personal protective
equipment (like insulation gloves and protective shoes) for the inverter maintenance.
b. Place temporary warning signs or erect fences to prevent unauthorized access to the
maintenance site.
c. Follow the procedures of maintenance stipulated in the manual strictly.
d. Check the relevant safety and performance of the inverter; rectify any faults that may
compromise the inverter security performance before restarting the inverter.
1.7 Additional Information
To avoid any other unforeseeable risk, contact Senergy immediately, if
there is any issue found during operation.
NOTICE

6
2 Overview of the Inverter
This chapter introduces the inverter and describes its functional model, network application,
appearance, dimensions, and working process etc.
2.1.1 Function
This series is a three-phase grid-tied PV string inverter (transformer less) that converts the DC
power generated by PV strings into AC power and feeds the power into power grid.
2.1.2 Model Description
Figure 2.1 shows a model number of the inverter, using 6K as an example.
6K
Power class code
Figure 2.1 Model number descriptions
2.1 Functional Models
2.2.1 Grid-tied PV Power Systems
This series inverter applies to grid-tied PV power systems for industrial/commercial rooftops,
fishing/farmers light complementary power generation systems, and large ground-based power
stations. Generally, these series inverters are used to low-voltage grid-tied PV power system,
as shown in Figure 2.2.
2.2 Network Application
The inverter is transformerless. Add an isolation transformer before
grounding the positive/ negative terminal of PV modules (like Thin
Film module) for operation.
Do not connect PV modules in parallel to several PV inverters for
operation.
WARNING
WARNING

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2.3.1 Dimensions
Figure 2.4 shows the dimensions of the inverter as follows:
These series inverters support TN-S, TN-C, and TT power grids as shown in Figure 2.3.
2.3 Outline and Dimensions
Figure 2.2 a low-voltage grid-tied PV power system
PV strings inverter AC Distribution Unit low-voltage power grid
Figure 2.3 Power grids supported by these series inverters
Figure 2.4 The dimensions of the inverter by front & lateral views (unit: mm)
Inverter
TN-S TN-C TN-C-S TT
Inverter Inverter Inverter
385
490
185

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Figure 2.6 The rear view of this series inverter
Figure 2.7 The bottom view of this series inverter
2.3.2 Outline
Figures 2.5 to 2.7 shows the outline of inverter as follows:
Mounting bracket
1. PV Indicator
2. Grid Indicator
3. COM Indicator
4. Warning Indicator
5. LCD (optional)
Figure 2.5 The front view and amplification effect of LED indicator area
1. DC isolation breaker
2. PV Strings connectors
3. Communications interface
4. RS485
5. AC OUTPUT CONNECTORS
6. External Protection Ground interface
7. Vent valve

2.4.1 Basic Principle Description
2.4.2 Circuit Diagrams
6K/8K/10K/12K/15K receive inputs from PV strings through DC switch and surge protection in
order: there are 2 groups of PV strings input terminals on DC input terminal of 6K/8K/10K; there
are 3 groups of PV strings input terminals on 12K/15K with the 2nd and 3rd routes terminals
merging into one independent MPPT. Then the inputs are grouped into two MPPT routes inside
the inverter to track the maximum power point of the PV strings. These two MPPT power is then
converted into DC Bus which is then converted to AC power through an inverter circuit. Finally
the converted AC power is fed to the Power grid through the inverter. Surge protection and EMI
filer are supported on both the DC and AC sides to reduce electromagnetic interference.
2.4 Working Process
DC EMI filter
PV DC
Switch
DC surge protector
MPPT
route1
MPPT
route2
invert circuit
AC EMI filter
AC surge protector
PE
L1
L2
L3
NN
relay
Figure 2.8 shows the circuit diagram for 6K/8K/10K.
Figure 2.8 circuit diagram
9

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Table 2.1 Working modes description
2.5 Working Modes
Three working modes of the inverter are shown as follows: standby, operating, and shutdown.
Table 2.1 shows the conditions for the inverter to switch between working modes.
The PV inverter enters the standby mode when
>the input voltage of PV Strings can enable auxiliary power supply to run,
but cannot meet the inverter operation requirements.
>the input voltage of PV Strings can meet the inverter to-start requirements,
but cannot meet its minimum power requirements.
When the PV inverter is grid-tied and generates electricity, it
> tracks the maximum power point to maximize the PV String output.
> converts DC power from PV strings into AC power and feeds the power
to the power grid.
The PV inverter will enter to the shutdown mode if detecting a fault or a
shutdown command.
Modes
Standby
Operating
Description
The PV inverter switches from standby or operating mode to shutdown
mode if detecting a fault or a shutdown command.
The inverter switches from shutdown mode to standby mode if receiving
a Startup command or detecting that a fault is rectified.
Shutdown
PV DC
Switch DC surge protector
invert circuit
AC surge protector
Figure 2.9 shows the circuit diagram for 12K/15K.
NN
PE
L1
L2
L3
Figure 2.9 circuit diagram
DC EMI filter
MPPT
route1
MPPT
route2
relay
AC EMI filter

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3 Storage
This chapter describes the storage requirements for the inverter.
The following storage instructions apply if the PV inverter will not be deployed immediately:
> Do not unpack the inverter (put desiccant in the original box if the PV inverter is unpacked).
> Store the PV inverter at a temperature range of -40℃ to +70℃ and with the relative humidity
of 0% to 100% (no condensing).
> The PV inverter should be stored in a clean and dry place and be protected from dust and
water vapor corrosion.
> A maximum of six layers of inverters can be stacked.
> Do not position the inverter at a front tilt, excessive back tilt, or side tilt, or upside down.
> Conduct periodic inspection during storage. Replace the packing materials immediately if any
rodent bites are found.
> Ensure that qualified personnel inspect and test the inverter before use if it has been stored
for a long time.

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4 Installation
4.1 Checking the Outer Packing
a. When receiving the inverter, check that the packing materials are intact.
b. After unpacking, check that the deliverables are complete, intact, and consistent with your
order list.
c. Examine the PV inverter and its fittings for damage such as scraps and cracks.
Do not install the inverter on flammable building materials or in an
area that stores flammable or explosive materials.
Do not install the inverter in a place where personnel are likely to
come into contact with its enclosure and heat sinks to avoid electrical
shock / burn.
Figures 4.1 The deliverables: The inverter and its fittings
CAUTION
DANGER
The inverter
Items Deliverables
File package
Rear panel
A
F
E
D
C
B
Expansion screw
(reserved for tighteningthe support and rear panel)
screw
DC terminal connector group

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horizontally. Hold the handles on both sides of the inverter, as shown in Figure 4.2.
Figure 4.2 Moving the inverter
The inverter is relatively heavy! To prevent device damage and personal
injury, arrange two people to move the inverter and handle with care.
>Do not place the PV inverter with its wiring terminals contacting the
floor because the power ports and signal ports at the bottom of the
device are not designed to support the weight of the inverter.
>When placing the inverter on the floor horizontally, put foam or
paper under to protect its enclosure.
4.3.1 Nameplate
After moving the PV inverter from packing box, identify it by reading its nameplate labeled on
the side of the inverter. The nameplate contains important product information: the model
information, communications/ technical specifications, and compliance symbols.
4.3 Identify the PV Inverter
CAUTION
CAUTION
If any damage mentioned above is found, contact the dealer
immediately.
4.2 Moving the inverter
After checking the outer packing, move the PV inverter to the designated installation position
NOTICE

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4.3.2 Compliance and Safety Symbols
Electrical shock!
There are residual voltages in the PV inverter. It needs 10 minutes
to finish discharge.
10mins
The PV inverter must not be touched when in operation. Its
enclosure and heat sinks are extremely hot.
Electrical shock! This part is charged. Only qualified and / or trained
electrical technicians are allowed to perform operations on the inverter.
If the inverter service life has expired, dispose it in accordance with
local rules for disposal of electrical equipment waste. Do not dispose
the PV inverter with household garbage.
The PV inverter is compliant with TUV.
Safety symbol Description
According to installation position, one kind of physical installation is described below in detail:
wall-mounting.
Basic Requirements
a. The inverter is protected to IP65 and can be installed indoors or outdoors.
b. The installation method and position must be appropriate for the weight and dimensions of
the inverter.
c. Do not install the inverter in a place where personnel are likely to come into contact with its
enclosure and heat sinks because these parts are extremely hot during operation.
d. Do not install the inverter in an area that stores flammable or explosive materials.
a. The ambient temperature must be below 50℃ which ensures the inverter’s optimal
operation and extends its service life.
Installation Environment Requirements
4.4.1 Determining the Installation Position
4.4 Installation Requirements
Type Ap prove d
Saf ety
Reg ular
Pro ducti on
Sur veill ance
2000 0000 00
ZER TIFI ZIER T

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b. The inverter must be installed in a well ventilated environment to ensure good heat dissipation.
c. The inverter must be free from direct exposure to sunlight, rain, and snow to extend its service
life. It is recommended that the inverter be installed in a sheltered place. If no shelter is
available, build an awning, as shown in Figure 4.3.
Figure 4.3 Installation environment with awning (unit: mm)
Carrier Requirements
Installation Space Requirements
a. It is recommended that the inverter be installed at eye level to facilitate operation and
maintenance.
b. Reserve enough clearance around the inverter to ensure sufficient space for installation
and heat dissipation, as shown in Figure 4.4.
a. The carrier where the inverter is installed must be fire-proof. Do not install the inverter on
flammable building materials.
b. The wall must be solid enough to bear the weight of the inverter.
c. Do not install the inverter on a wall made of gypsum boards or similar materials with weak
sound insulation to avoid noise disturbance in a residential area.
the front view
Awning
the lateral view
≥500
≥1000

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the front view the lateral view
Figure 4.4 Installation Space Requirements (unit: mm)
c. When installing multiple inverters, install them along the same line (as shown in Figure 4.5)
if sufficient space is available, and install them in triangle mode (as shown in Figure 4.6) or
in stacked mode (as shown in Figure 4.7) if no sufficient space is available. The installation
modes ensure sufficient space for installation and heat dissipation.
Figure 4.5 Installation along the same line (unit: mm)
>500
>1000
>600
>200 >200
200 200

100
300
Figure 4.6 Installation in triangle mode (unit: mm)
200
1000
Figure 4.7 Installation in stacked mode (unit: mm)
The clearance between multiple inverters must be increased to
ensure proper heat dissipation when they are installed in a hot area.
NOTICE
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