V-TAC VT-6605305 User manual

INSTRUCTION MANUAL
SOLAR INVERTER WITH LCD DISPLAY &
DC SWITCH -THREE PHASE
IN CASE OF ANY QUERY/ISSUE WITH THE PRODUCT, PLEASE REACH OUT TO US AT: [e-mail]
FOR MORE PRODUCTS RANGE, INQUIRY PLEASE CONTACT OUR DISTRIBUTOR OR NEAREST
DEALERS. V-TAC EUROPE LTD. BULGARIA, PLOVDIV 4000, BUL.L.KARAVELOW 9B
Thank you for selecting and buying V-TAC Product. V-TAC will serve you
the best. Please read these instructions carefully & keep this user manual
handy for future reference. If you have any another query, please contact
our dealer or local vendor from whom you have purchased the product.
They are trained and ready to serve you at the best.
INTRODUCTION
Multi-Language Manual QR CODE
Please scan the QR code to access the manual
in multiple languages.
MODEL
VT-6605305
VT-6608305
VT-6610305
SKU
11371
11372
11373

WARNING
1. Please make sure to turn off the power before starting the installation.
2. Installation must be performed by a qualified electrician.
3. Proper grounding should be ensured throughout the installation.
Caution, risk of
electric shock.
This marking indicates that this
product should not be disposed
of with other household wastes.
20
PAP
SAFETY PRECAUTIONS
The series grid-tied solar inverters are designed and tested strictly in accordance with
relevant international safety standards. As an electrical and electronic device, all relevant
safety regulations must be strictly complied during installation, operation, and maintenance.
Incorrect use or misuse may result in：
• Injury to the life and personal safety of the operator or other people.
• Damage to the inverter or other property belonging to the operator or other people.
In order to avoid personal injury, damage to the inverter or other devices, please strictly
observe the following safety precautions.
This chapter mainly describes various warning symbols in operation manual and provides
safety instructions for the installation, operation, maintenance and use of the series grid-tied
solar inverters.
ICONS
This manual provides relevant information with icons to highlight the physical and property
safety of the user to avoid device damage and physical injury.
The icons used in this manual are listed below:
Icons Name Instruction Abbreviation
Danger
Danger
Serious physical injury or even death
may occur if not follow the relative
requirements
Warning
Warning
Physical injury or damage to the
devices may occur if not follow the
relative requirements
Do not
Electrostatic
sensitive
Damage may occur if not follow the
relative requirements
Hot sides
Hot sides Sides of the device may become hot.
Do not touch.
Note Note The procedures taken for ensuring
proper operation.
Note

SAFETY GUIDELINES
After receiving this product, first ma ke sure that the product is well
packaged. If you have any questions, please contact the shipping
company or local distributor immediately.
Installation of PV inverters must be performed by professional
technician who has been specially trained, thoroughly read and familiar
with all the contents of this manual and familiar with the safety
requirements of the electrical system.
Do not carry out any wiring and inspection or changing components
when the power supply is applied.
Ensure that there is no electromagnetic interference from other
electrical and electronic equipment on the installation site.
Do not refit the inverter unauthorized.
All the electric installation needs to be compliance with the national or
local laws and standards.
The temperature of individual parts o rthe enclosure of the inverter–
especially the heat sink may become hot in normal operation. There is a
danger of burning. Do not touch.
It must be reliably grounded before operation.
Do not open the cover of inverters unauthorized.The electrical parts
and components inside the inverter are electrostatic. Take
measurements to avoid electrostatic discharge during rel evant
operation.
The inverter must be reliably grounded.
Ensure that DC and AC side circuit breakers have been disconnected
and wait at least 5 minutes before wiring and checking.
Note: Technical personnel who can perform installation, wiring, commissioning,
maintenance, troubleshooting and replacement of the series grid-tied solar inverters
must meet the following requirements:
Operators need professional training.
Operators must read this manual completely and master the related safety precautions.
Operators need to be familiar with the relevant safety regulations for electrical systems.
Operators need to be fully familiar with the composition and operating principle of the
entire grid -tied photovoltaic power generation system and related standards of the
countries/regions in which the project is located.
Operators must wear personal protective equipment.

WHAT TO DO AFTER SCRAPPING
DELIVERY AND INSTALLATION
GRID-TIED OPERATION
Only qualified electricians are allowed to operate the inverter under the
permission of local power departments.
All electrical connections must meet the electrical standards of the
countries/regions in which the project is located.
Ensure reliable installation and electrical connection before operation.

Do not open the cover of inverter during operation or voltage is present.
Keep the package and unit complete, dry and clean during storage and
delivery.
Please remove and install the inverter with two or more people, because of
the inverter is heavy.
Remove and instal l the inverter with appropriate tools to ensure safe and
normal operation and avoid physical injury or death. The people also need
mechanical protective measures, such as protective shoes and work clothes.
Only qualified electricians are allowed to install the inverter.
Do not put and install the inverter on or close to combustible materials.
Keep the installation site away from children and other public places.
Remove the metal jewelry such as ring and bracelet before installation and
electrical connection to avoid electric shock.
Do cover solar modules with light-tight materials before electrical connection.
Exposed to sunlight, solar modules will output dangerous voltage.
The inverter input voltage cannot exceed the maximum input voltage;
otherwise inverter damage may occur.
The positive and negative pole of solar module s cannot be grounded,
otherwise irrecoverable damage may occur.
Ensure the proper grounding of the inverter, otherwise, improper connection
or no grounding may cause stop of the in verter.

Ensure reliable installation and electrical connection.
Do not dispose of the inverter together with household waste. The user has
the responsibility and obligation to send it to the designated organization for
recycling and disposal.

APPLICATION
The photovoltaic grid-tied power generation system consists of solar modules, grid-tied
inverter, metering devices and public grid.
Grid-tied solar inverter is the core of photovoltaic power generation system. The solar energy
can be converted into DC electric energy through solar modules and then be changed into
sinusoidal AC energy which has the same frequency and phase with the public grid by
grid-tied solar inverters, and then be fed to the grid.
The series grid-tied solar inverters are only applied in solar grid-tied power generation
system and its DC input are only composed of crystalline silicon solar modules whose
negative and positive poles are not grounded.
MAINTENANCE AND INSPECTION
SOLAR GRID-TIED POWER GENERATION SYSTEM
 Only qualified electricians are allowed to perform the mainte-
nance, inspection, and components replacement of the inverter.
 Contact with the local dealer or supplier for maintenance.
 In order to avoid irrelevant personnel from entering the mainte-
nance area during maintenance, temporary warning labels must be
placed to warn non-professionals to enter or use fence for isolation.
 Firstly disconnect all power supplies of the grid to the inverter
before any maintenance, and then disconnect the DC breakers and
wait for at least 5 minutes until the inverter is discharged before
maintenance.
 Please follow electrostatic protection norms and take correct
protective measures because of the electrostatic sensitive circuits
and devices in the inverter.
 Do not use parts and components not provided by our company
during maintenance.
 Restart the inverter after settling the fault and problem which may
affect the safety and performance of the inverter.
 Do not get close to or touch any metal conductive part of the grid
or inverter, otherwise electric shock, physical injury or death and fire
may occur. Please do not ignore the warning icons and instructions
with “electric shock”.
Figure 1 Application of the series grid-tied solar inverters

The series grid-tied solar inverters support TN-S, TN-C, TN-C-S and TT grid connection.
When applied to the TT connection, the N-to-PE voltage should be less than 30V.
Figure 2 Type of grid
SUPPORTED GRID CONNECTION STRUCTURE
PRODUCT APPEARANCE
The recommended solar modules need to comply with IEC61730 Class A
standard.
Figure 3 Products appearance

PARTS INSTRUCTION
NAMEPLATE
Figure 4 Inverter nameplate
1. Trademark and product type
2.Model and important technical
parameters
4.Serial number, company name
and country of origin.
3.Certification system of the
inverter confirming
No. Name Instruction
1Cover
2Operationalpanel LED statuslight, LCD display, keypad
3DC switch On–off of the DC input (optional)
4DCinput port Forthe connection of solar modules
5Communication port RS485 and EXT communication port
6AC terminal Forthe connection of AC output
7Cooling chamber
8Back panel mounting screws
9Name plate For rated parameters and safety precautions of the inverter
10 FAN 4~6kW(NO FAN) , 8~10kW(Air cooling)

ICONS CERTIFICATION
PRODUCTS MODULES
Table of the grid-tied solar inverter
Icons Instruction
TUV certification mark. The inverter is certified by TUV.
CE certification mark. The inverter complies with the CE directive.
CQC certification mark. The inverter is certified by CQC.
EU WEEE mark. Cannot dispose of the inverter as household waste.
Note: The technical parameters of grid-tied solar inverter refer to the appendix
Product name Model Rated output power （W）
Three-phase (L1,L2,L3,N,PE)
Three-phase grid-tied solar inverter 4kW 4000
Three-phase grid-tied solar inverter 4kW-S 4000
Three-phase grid-tied solar inverter 5kW 5000
Three-phase grid-tied solar inverter 5kW-S 5000
Three-phase grid-tied solar inverter 6kW 6000
Three-phase grid-tied solar inverter 8kW 8000
Three-phase grid-tied solar inverter 10kW 10000

DIMENSIONS AND WEIGHT
Figure 5 Inverter dimensions
Table of inverter dimension and net weight
Figure 6 Paper packages dimension
Table of packages dimension and gross weight
Model H (mm) W (mm) D (mm) Net weight (kg)
4kW / 4kW–S / 5kW
/ 5kW-S / 6kW
530 360 150 20
8kW / 10kW 575 360 150 23
W
H
D
Model H (mm) W (mm) D (mm) Weight
(kg)
Packaging
Material
4kW / 4kW–S / 5kW /
5kW-S / 6kW 630 470 284 22 Paper
8kW / 10kW 675 470 284 25 Paper

STORAGE
If the inverter is not put into use immediately, the storage of inverter should meet the
following requirements:
• Do not remove the outer packing.
• The inverter needs to be stored in a clean and dry place, and prevent the erosion of
dust and water vapor.
• The storage temperature should be kept at -40°C~+70°C, and the relative humidity
should be kept at 5%RH~95%RH.
• The stacking of inverters is recommended to be placed according to the number of
stacking layers in the original shipment. Place the inverter carefully during stacking to
avoid personal injury or equipment damage caused by the falling of equipment.
• Keep away from chemically corrosive substances that may corrode the inverter.
• Periodic inspections are required. If damages are found by worms and rats, or packag-
ing are found to be damaged, the packaging materials must be replaced in time.
After long-term storage, inverters need to be inspected and tested by qualified personnel
before put into use.
INSTALLATION
This chapter describes how to install the inverter and connect it to the grid-tied solar
system (including the connection between solar modules, public grid and inverter).
Read this chapter carefully and ensure all installation requirements are met before
installation. Only qualified electricians are allowed to install the inverter.
UNPACKING INSPECTION
The inverter has been thoroughly tested and rigorously checked before delivery, but
damage may still occur during transportation. Before unpacking, check carefully whether
the product information in the order is consistent with that on the nameplate of the
package box and whether the product package is intact. If any damage is detected,
please contact the shipping company or the supplier directly. Please also provide photos
of the damage to get our fastest and best service.
Store the idled inverter in its original package and take anti-moisture and anti-dust
measures.
After taking the inverter out of the box, check the following items:
(1) Confirm the main body of the inverter is intact and free from any damage;
(2) Confirm there is operation manual, interface accessories and installation accessories
inside the package box;
(3) Confirm the deliverables inside the package box are intact and complete;
(4) Check whether the product information in the order is consistent with that on the
inverter nameplate;
(5) The standard delivery list is shown below
Standard deliverables of inverter:
Figure 7 Delivery content

INSTALLATION PLACE
Select installation site according to below
requirements:
(1) The height of the installation position should
ensure that the line of sight is on the same level
as the LCD for viewing the parameters inverter
conveniently.
BEFORE INSTALLATION
Installation tools
Table of detailed delivery list of single-phase inverter
Table of tools list
Figure 8 Optimal mounting height
No. Na me Quantity
14kW/ 4kW-S / 5kW/ 5kW-S / 6kW/ 8kW/ 10kWinverter 1
2Installation bracket 1
3Operation manual 1
4Assembling bolts M5*20 2
5Expansion bolts M6*50 4
6Communication connector 1
7DC connector 2 pairs / 1pair（4kW- S、5kW- S）
8ACconnector 1
No. Installa tion tools Instruction
1Marker Markthe installation hole
2Electric drill Drillholeson the bracket or on the wall
3Hammer Knock on the expansion bolt
4Adjustable wrench Fix the installation bracket
5Inner hex screwdriver
Tighten the anti- theft sc rew and
disassemble AC junction box
6“Slotted” or“cross-head” screwdriver AC wiring
7Megameter
Measure the insulation performance and
grounding impedance
8Multimeter
Check the circuit and measure AC/DC
voltage
9Electric soldering iron Solder the communication cable
10 Wire crimper Crimp DC terminal

Figure 9 Installation position
(4) The ambient temperature of installation should be -25°C~60°C.
(5) The installation site should be away from electronic devices which can generate strong
electromagnetic interference.
(6) The inverter should be installed on firm and solid surface such as wall surface and metal
bracket.
(7) The installation surface should be vertical to the horizontal line.
(8) The installation should ensure that the inverter is reliably grounded, and the material of
grounded metal conductor should be consistent with the metal material reserved for the
grounding of the inverter.
Install the inverter vertically or backward ≤ 15° to facilitate heat dissipation.
Do not tilt the inverter forward, horizontal, upside down, over- backward, and roll when
install the inverter.
 Do not open the cover of the inverter or replace any part as incomplete
inverter may cause electric shock and damage the device during operation.
(2) The installation site must be well ventilated
and away from raindrops or direct sunlight.
(3) There must be enough pre-reserved space
around the installation site for convenient
disassemble of the inverter and air convection
Figure 8 Installation space

CABLE SPECIFICATION
In order to regulate and compatible with the inverter AC/DC connector or terminal block
specifications, below requirements on the AC/DC cable connected to corresponding inverter
should be fulfilled:
MICRO BREAKER
In order to ensure safe operation of the inverter and circuits, it is recommended to
configure corresponding micro breaker or fuse on the DC input side and AC output side
of the inverter. Table below is the requirements recommended for micro breaker:
MECHANICAL INSTALLATION
The material for fixing the inverter and the installation mode vary with the different
installation sites. It is recommended to install the inverter vertically to the firm wall or
metal bracket. Here we take wall installation as an example to introduce the installation
matters of the inverter.
As shown in the Fig 10, the overall installation of the inverter should be vertical to the
horizontal surface.
Table of cable specifications
Table of specifications of micro breaker
Figure 10 Installation bracket of inverter
INSTALLATION OF INVERTER
Inverter model
DC side AC side
Min cross-section
area
mm²(length≤50m)
Min cross section
area mm²
(Length>50m)
Min cross section
areamm² (Length≤50m)
LN/PE
4kW / 4kW-S /
5kW / 5kW-S /
6kW / 8kW / 10kW
4 6 4 4
Inverter model
DC side AC side
Recommended breaker
specification
Recommended breaker
specification
4kW / 4kW-S / 5kW / 5kW-S /
6kW
DC1000V, C16A, 2P AC400V, C16A, 4P
8kW / 10kW DC1000V, C25A, 2P AC400V, C25A, 4P

Table of size of installation bracket
Figure 10 Determine the punch position
Figure 12 Install expansion bolts
Figure 11 Drilling
(3) Fix the expansion bolts to the 4 installation holes with hammer, as shown in Figure 12.
Inverter model
Spacing of installation hole
A(mm)*B(mm)
4kW / 4kW-S / 5kW / 5kW-S / 6kW /
8kW / 10kW 260*45
The procedures for installation of inverter are listed below:
(1) Use the punch positioning plate in the packaging box to determine the punch position.
As shown in Figure 10 Level the holes with a level ruler and mark it with a marking pen.
(2) Drill 4 installation holes on the wall with electric drill. As shown in Figure 11

Figure 15 Installation of M5X20 bolts
(4) Fix the installation bracket
onto the expansion bolts and
ensure the installation is firm
enough(tightening torque is
13N•m) . As shown in Figure
13.
(5) Hang the inverter onto the
installation bracket and ensure
the installation is firm enough.
As shown in Figure 14.
(6) Ensure the inverter is
installed properly and tighten
the M5X20 bolts into the screw
holes on the left and right side
of inverter (tightening torque is
3N•m). As shown in Figure 15.
Figure 13 Fix the installation bracket
Figure 14 Installation of inverter

WIRING INSTALLATION
This section presents the detailed contents and safety precautions related to electrical
connection. Fig 16 is the connection diagram for PV grid-connected system.
Figure 16 PV grid-connected system diagram
 Electrical connection must be carried out by professional technicians as wrong
operation may cause damage to the device, physical injuries or even death
during system operation.
 All the electrical installation must conform to the national and local electrical
safety regulations.
 Ensure all the cables are installed firmly according to the specified safety
requirements and free from any damage.
 It is not allowed to close the AC and DC breakers before the inverter is
electrically connected.
Note
 Read and follow the instructions provided in this section .Strictly follow the
requirements when operating.
 Always note the rated voltage and current defined in this manual. Never exceed
the limits.

WIRING INSTALLATION
The procedures for connecting PV string t to the inverter DC input are shown below：
(1) Before connecting PV string to inverter, ensure proper measures against lightening
and short circuit have been taken;
(2) Connect the output cables of solar modules to the DC connector of inverter as Figure
17 shows. Remove the isolation layer of the DC cable for about 8-10mm. Insert the
conductor part into the appropriate position of the connector, crimp the MC4 DC terminal
and tighten the nut with a torque of 2.5-3Nm. Ensure the poles of solar modules are
correctly and well connected with the connectors
(3) After the DC connector is connected, use a multimeter to measure the voltage of the
DC input string, verify the polarity of the DC input cable, and ensure that the voltage of
each string is within the allowable range of the inverter, as shown in Figure 18.
Figure 17 MC4 DC connector and PV string connection
PV strings can be connected to inverter only after protection measures
which conform to local electrical regulations are taken and the technical
parameters in this manual are fulfilled.
The PV string connected to the series inverter must adopt the DC connector
configured especially for the inverter, do not use other connection devices
without authorization from our company, otherwise damage to the device,
unstable operation or fire may occur and our company will not undertake
quality assurance or assume any direct or joint liability thereof.

GRID CONNECTION
(1) Before connect the three-phase
AC grid cable to the inverter, take
lightning and short circuit protection
measures in accordance with the local
electrical safety codes
(2) Connect and fasten L1, L2, L3, N
and PE conductors of the three-phase
grid to AC terminal with 0.5 Nm
torque. Tighten the terminal with
tightening torque of 2.5-3 Nm, and
then connect the terminal to the AC
port of the inverter.
(4) Connect PV string to the inverter
and ensure tightly-fastened
(5) When removing the DC connector
from the inverter, insert the head of
the straight screwdriver into the
raised hole in the middle of the
connector, and force the movable end
of the connector to exit.
Figure 18 DC input voltage measuring
Figure 19 AC connection of single-phase inverter
• Only qualified cables under the local electrical safety laws and
regulations and comply with the technical parameters of this
manual are allowed to connect to the inverter.
• Only with the permission of the local electric power company can
the inverter be connected to the utility grid.
Inve rter AC
connector
Three
phase grid Note
1L1（A）
2L2（B）
3L3（C）
NN
PE
Must be
connected
Table of description of AC connector.

OPERATION
INSPECTION BEFORE OPERATION
INVERTER GRID-CONNECTED RUNNING
The following items must be checked strictly before running the PV grid-connected
inverter (including but not limited to the following items):
(1) Ensure the installation site meet the requirement mentioned in “before installation”
for easy installation, removing, operation and maintenance.
(2) Ensure the mechanical installation meet the requirement.
(3) Ensure the electrical installation meet the requirement.
(4) Ensure all switches are “off”.
(5) Ensure the open-circuit voltage of PV module conforms to the parameter requirements
of inverter DC side in Technical parameters;
(6) Ensure all electrical safety precautions are clearly-identified on the installation site.
(1) Confirm the requirements in inspection before operation are fulfilled;
(2) Close the breaker on inverter public grid AC side;
(3) Close the integrated DC switch of the inverter;
(4) Close the circuit switch on PV string DC input side;
(5) Observe the LED indicator state of the inverter and the information displayed by
LCD. Refer to “Operation” for LED state indicator and LCD display information.
(6) Set the inverter time according to local time, refer to section parameter settings to
complete time setup.
(7) The default DC input mode of inverter is “independent” mode; refer to section
parameter settings to check and set DC input mode.
In order to ensure a safe, normal and stable operation of the PV power
generation system, all the newly installed, renovated and repaired PV grid -
connected power generation system and its grid -connected inverter must
undergo inspection before running.
Start the inverter according to below steps to achieve grid-connected operation of the
inverter:
Note
Must to select the country to set grid-connected standard during the initial
operation of the inverter
Keep the power-on state of the inverter for at least 30 minutes, and complete
the charging of built-in clock battery of the inverter to ensure the clock can run
normally!
Run
Green indicator flickers, other indicators are off: Inverter is powered on and
under self-inspection, wait for enough light to fulfill grid -connected condition;
Run
Green indicator on, others off: The inverter is in power generation after self-
inspection----successful commissioning.
“Warn” or “Fault” indicator is on or flickers: inverter is powered on but system fault
occur. Refer to LCD screen to check the fault code in LCD display, stop the inverter as per
STOPPING, and rule out faults according to TROUBLESHOOTING. After all the faults are
removed, repeat the operations

STOPPING
When it is necessary to carry out power-off maintenance, inspection and fault elimination
on the inverter, stop the inverter according to the following steps:
(1) Disconnect the breaker on inverter public grid AC side;
(2) Disconnect the integrated DC switch of the inverter;
(3) Disconnect the switch on PV string DC input side;
(4) Wait for at least 5 minutes until the internal parts of the inverter are fully discharged,
and complete the stop operation.
DAILY MAINTENANCE
In solar PV grid-connected power generation system, the series grid-connected solar
inverter can realize grid-connected power generation and stop/start operations automati-
cally day and light in whatever seasons. In order to safeguard and prolong the service life
of the inverter, it is necessary to carry out daily maintenance and inspection on the
inverter besides using the inverter strictly according to this manual.
PERIODIC MAINTENANCE ON THE INVERTER
Item Inspection mode Maintenance period
Save the inverter
running data
Adopt monitoring software to read the inverterdata in
real time, and backup the data recorded by monitoring
software periodically. Save the inverterrunning data,
parameters and logs into the file, check the monitoring
software and various parametersetup of the inverter.
Once perquarter
Inverterrunning
state
Observe whetherthe inverteris installed firmly, damaged
ordeformed. Listen forabnormalnoise during inverter
operation. Check the variables during systemgrid-
connected running. Check whetherthe temperature of
inverterenclosure is normal and monitorthe heating
condition with thermalimager.
Once perhalf a year
Clean the inverter
Check the RH and dust around the inverter, and clean
the inverterwhen necessary.
Once perhalf a year
Electrical
connection
Check whethersystemcable connection and inverter
terminalblock are loosened, if yes, secure themagain in
the mannerspecified in section "Installation". Check
whetherthe cable is damaged, and whetherthe cable
skin touched by the metalsurface is cut.
Once perhalf a year
Maintenance and
replacement of
cooling fan
Observe whetherthe air inlet/outlet is normal; check
whetherthere are cracks on the fan leaf. Listen for
abnormal noise during fan rotation. Clean the air
inlet/outlet if necessary; If any abnormity occurred to the
fan, replace the fan immediately.
Once perhalf a year
Safety function
Check the inverterLCD and stop function of the system.
Simulate stop operation and check the stop signal
communication. Check the warning marks and replace
themif necessary.
Once perhalf a year