Volt 1KTS User manual

Solar Grid Tie Inverter
User Manua l

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1. Notes
This manual is an integral part of the inverter. Please read this manual carefully before installation,
operation or maintenance and it’s for future reference.
1.1 Scope
1KTS 1.5KTS 2KTS 3KTS
4KTS 5KTS 6KTS 7KTS
Please keep this manual where it will be accessible at all times.
1.2 Target Group
This manual is to be read by qualified installer and PV system user. The tasks described in this manual
must only be performed by qualified technical service personnel.
1.3 Symbols Used
Some symbols are used in this manual in order to ensure safety of personal and property. Please read
the following symbols carefully.
2. Safety
2.1 Appropriate Usage
The Series is a Solar PV inverter which converts the DC current from a PV generator into
AC current and feeds it into the public grid.

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Figure 1 Solar PV Grid-tied System
2.2 Important Safety Instructions

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2.3 Explanation of Symbols
This section gives an explanation of all the symbols shown on the inverter and on the type label.
●Symbols on the Inverter
● Symbols on the Type Label
● Important Safety Instructions
When using the product, please read follow information below to avoid fire, lightning or other
personal injury:

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● Before using the Series inverter, read all instructions and cautionary markings on the
Series inverter, and all appropriate sections of this guide.
●Use only a accesories recommended or sold by , otherwise may result in risk of fire, electric shock,
or injury to persons.
● To avoid risk of fire and electric shock, make sure that existing wiring is in good condition and
cables used are not undersized. Do not operate the Series inverter with damaged or substandard
wiring.
● Do not disassemble the Series inverter. It contains no user-serviceable parts. See Warranty
for instructions on obtaining service. Attempting to service the Series inverter, the user may result
in risk of electric shock or fire and will void the warranty.
● To reduce the risk of electric shock, authorized service personnel must disconnect both AC and DC
power from the Series inverter before attempting any maintenance or cleaning or working on any
circuits connected to the Series inverter. Turning off controls alone will not reduce this risk.
● Keep away from flammable, explosive materials to avoid fire disaster.
● The installation location should not be close to humid or corrosive substance.
● To avoid electric shock, please do not disassemble the inverter as there are high-voltage
capacitances installed inside the inverter. Fatal High-voltage will remain in the inverter for 5 minutes
after its disconnection from grid or PV plant.
● To reduce the chance of short-circuits, authorized service personnel must use insulated tools when
installing or working with this equipment.
3.Introduction
3.1 Basic Features
Congratulations on your purchase of a series inverter. The Series inverter is one of the finest inverter
on the market today, incorporating state-of-the-art technology, high reliability, and convenient control
features.
 Advanced MCU ( Microcontroller Unit) control technology.
 Utilize the latest high-efficiency power component.
 Optimal MPPT technology.
 Advanced anti-islanding solutions.

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 Excellent protections.
 IP65 protection level.
 Efficiency up to 97.6%.
 Total Harmonic Distortion (THD)＜3%.
 Safe & Reliable: transformer less design with software and hardware protection.
 Friendly HMI ( Human Machine Interface).
 LED status indication.
 LCD display of technical data, Human-Machine interaction through press key.
 RS485/RS232 communication interface.
 PC remote control.
3.2 Electrical block diagram
Figure 2 Electrical block diagram
●Terminals on the inverter

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Figure 3 Terminals of PV inverters 1KTS/ 1.5KTS
t
Figure 4 Terminals of PV inverters 2KTS/ 3KTS
Figure 5 Terminals of PV inverters 4KTS / 5KTS / 6KTS/ 7KTS
3.3 Dimensions and Weight
●Dimension

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Figure 6 1KTS/ 1.5KTS
Figure 7 2KTS/ 3KTS

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Figure 8 4KTS / 5KTS / 6KTS/ 7KTS
●Weight
Table 1 Weight in kilo grams, kgs
Model 1KTS 1.5KTS 2KTS 3KTS 4KTS 5KTS 6KTS 7KTS
Weight
[kgs]
11Kgs
11.5Kgs
15Kgs
15.5Kgs
21Kgs
21.5Kgs
22.5Kgs
23Kgs
4. Technical Data
4.1 Input (DC)
M od el 1K
T S 1.5KTS 2K T S 3K T S 4K T S 5K T S 6K T S 7K T S
Max. DC power [W]
1100
1600
2300
3200
4200
5400
6100
7000
Max. DC voltage
[V]
500
550
Max. input Current
[A]
8.8
9.7
11
13
21
26
32
37
N
u
m
b
e
r
o
f
MP
P
trackers / Strings per
MPP tracker
1 / 1
1 / 2
MPPT voltage range
(at rated power) [V]
120-425
160-425
200–500
210-500
180-500
180-500
180-500
180-500
Shutdown voltage /
Start voltage [V]
70 / 100
70 / 100

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4.2 Output (AC)
M od el 1K
T S 1.5KTS 2KTS 3KTS 4K T S 5K T S 6K T S 7K T S
AC nominal power [W] 1000 1500 2000 2600 3000 3680 4000 4600
Max. AC power [W] 1000 1500 2200 2800 3300 3680 4400 5000
Max. AC current [A] 4.5 6.8 9 13.6 17.5 23 27 32
Nominal AC voltage / range
[V]
230 / 180~270
AC grid frequency / range
[Hz]
50 / 47~52
Power factor (cosφ) 1
Total harmonic distortio
n
( T HD) (at nominal power)
< 3%
＊Detailed parameter please see local grid standard
4.3 Efficiency, Safety and Protection
M od el 1K
T S 1.5KTS 2K T S 3KTS 4KTS 5K T S 6K T S 7K T S
Max. efficiency
96.6%
96.8%
96.8%
97.0%
97.4%
97.6%
97.6%
97.6%
Euro- efficiency
95.5%
96.0%
96.2%
96.3%
96.5%
97.1%
97.1%
96.8%
MPPT efficiency
99.9%
Safety & Pro tecti on
Overvoltage / under-
voltage protection
Y e s
DC isolation impedance
monitoring
Y e s
Ground fault protection
Y e s
Grid monitoring
Y e s
Gr
ou
n
d
f
a
ul
t
c
u
rr
e
n
t
m
onit
o
r
i
n
g
Y e s
DC injection monitoring
Y e s

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4.4 General Data
Mod el 1K
T S 1.5KTS 2K T S 3K T S 4K T S 5K T S 6K T S 7K T S
Dimension (W/H/D) 288*350*140[mm] 338*430*138[mm] 345
/ 440 / 186[ mm ]
Weight [kg] 11 11.5 13.5 15.5 2
1
21.5 22 2
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Cooling concept
Convection
Convectio
n
Convection
Convectio
n
F a n
F a n
F a n
F a n
Noise (typical) [dB]
< 28
< 28
< 30
< 30
< 30
< 40
< 40
< 40
O
p
e
r
a
tin
g
temperature range
[°C]
-20 °C ～ +60 (de-rating at 45 °C)
Degree of protectio
n
IP65
Topology Transformer le ss
I
nt
e
r
n
a
l
c
on
s
um
-
ption( night ) [W]
0
LCD display Backlight, 16*2 character LCD
Communication
interfaces
R S232
RS485 / R S232
Standard warranty
5 y ea rs
5. Function
Operation Mode
【standby Mode】
The standby mode means that the inverter is ready for operation but still not connected to the grid. In this mode, it
will continue to check whether PV array has enough power to feedback into grid. When the inverter passes dump
load test after startup, it will change from standby mode to Checking mode.
【Checking Mode】
If inverter passes dump load test and no error/fault occurs, will start checking mode to deliver power.
【On-grid Mode】
In this mode, series inverters convert PV array’s DC into AC and feedback into grid.

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【MPPT Mode】
The default setting is MPPT mode, the operation mode will return to MPPT after DC&AC restart.
【Fault Mode】
If any fault/error occurs, inverter will stop delivering power until the fault/error is rectified. Some fault/error will
recover automatically, and others may need manual restart.
【Setting Mode】
Press “Function” key for 5 seconds to get into the Setting mode if DC power exists. Please refer to chapter 7 of
the Manual more information.
6. Installation
6.1 Packaging
Type
Project
No.
Description
QTY
Remark
Equipment 1 PV Grid-tied Inverter 1 unit
Spare parts bag includes M5
flange nuts,
expansion screws,
M5 tapping screws
Accessories 2 Backboard 1 pc
Accessories
3 Spare parts 1 bag
4
AC connector 1 pc
5 DC connector assembly 1 / 2
6 Product manual 1 pc
Table 1 Packaging list
6.2 Preinstallation precautions

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Check the location where inverter is to be installed to ensure the following.
●The ambient temperature is within the operation range ( -20°C to +60°C -4°F to +140°F,).
●The altitude is less than 2,000 m.
● Not prone to be damaged by sea water.
● Not close to corrosive gas or liquid (for example, locations where chemicals are processed or lots of poultry is fed).
● Not exposed to direct sunlight.
● Not prone to be flooded snowed in.
●Ensure good ventilation and low humidity.
● Not exposed to steam, vapor, or water.
●Not exposed to direct cool air.
●Not close to television antenna or antenna cae.
●Inverter needs to be at least 30 cm (see table 2) clearance. If this is not observed, inverter is likely to malfunction
high temperature inside the inverter, will not cover any damage due to this condition .
P
o
siti
o
n
Mi
n
.
c
l
eara
n
c
e
Side 30cm
Top 30cm
Bottom 30cm
Front 10cm
Table 2 Minimum clearance needed
6.3 Preparation
Following tools are needed for installation.
Installation T o ol s
Installation Tools: Crimping tool, Plier, Electrical drill and Screwdrivers & adjustable spanner.
6.4 Installation Steps

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Step 1: Drill holes in the wall with electrical drill according to the size of bracket (it is packed in the box). Drill
straight into the wall do not shake the dril to avoid damage to the wall. Depth of the holes should be about 30mm
and should be the same in all the holes. After removing dust from the holes, measure the net depth of the holes. If
the depth is more than 33mm or less than 27mm, the expansion pipes can not be properly installed.

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Figure 9 Installation of Expansion Pipe
Step 2: Clean all dust outside/inside the hole and ensure the distances between hole are as per
requirement. Insert expansion pipes into the holes vertically, use rubber hammer to tap the pipes into the
wall completely. Insert the bracket into expansion pipes and use expansion screws to fasten the
Bracket.
Figure 10 Bracket Installation
Step 3: Mount inverter onto the narrow vertical panel , ensure upper corner of the inverter is hooked onto
the bracket, use M5 screws to fix the lower part of the inverter to the bracket (See figure 10).
Step 4: Use M5 flange nut to fix the bottom of the inverter.
Step 5: Complete the installation process.
6.5 Connections of the PV power system
●PV String
inverters 4KTS, 5KTS 6KTS and 7KTS have facility to connect two strings of PV modules while the other
models can only take one module string. Use only one string PV modules with excellent performance
and reliable quality. Open-circuit voltage of modules connected in series should
be ＜ Max. DC input voltage of the inverters (Ref Table 3) and the operating voltage at all times
should be within the MPPT voltage range.

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Model 1K
T S 1.5K T S 2K T S 3K T S 4K T S 5K T S 6K T S 7K T S
Max. DC voltag
e
500V 550 V
Table 3 Max. DC Voltage of inverters
Only use good quality PV cables to connect modules to inverter. Normally the voltage drop between
modules and inverter could be about 1-2%. Hence inverter should be installed as close to the PV
module as possible to reduce cable losses.
Figure 11 Use of Multimeter to measure module array voltage
● AC Output
This series inverters are designed for single phase grid. Operating AC voltage range from
180V to 260V (200V-270V for Australia) and the typical frequency is 50Hz. Other
operating parameters should comply with local public grid regulations.
Table 4 Cable and MCB Requirement

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Model
1KTS 1.5KTS 2KTS 3KTS 4KTS 5KTS 6KTS 7KTS
Cable (Cu)
1.5mm2
2.5mm2
2.5mm2
4mm2
4mm2
6mm2
6mm2
6mm2
MCB
10A 16A 16A 20A 20A 32A 40A 50A
MCB with rated fault current of 30 mA≤Ifn≤300 mA should be installed between inverter and grid.
No load should be connected directly with the output of inverter.
Figure 12 Incorrect connections between Load and Inverter
Impedance of the AC connection should be less than 2Ω. To ensure anti-islanding function PV cable
should ensure power loss to be ＜1% of nominal power. Also AC cable between inverter and grid
connection point should be less than 150m. Chart below provides relationship between AC cable
length and cross section with losses
Figure 13 AC Cable Loss for inverter
inverters come with good quality IP66 /IP68 AC connector. Please refer to information
below to make correct AC connection.

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Figure 14 AC Connector details
Follow below steps for wiring AC Connectors.
Step1: Pass the AC wire through the threaded sleeve and pressure screw (See figure 15).
Figure 15
Step2:Connect the AC cables as explained below.
· Fix the green and yellow ground cable to the ground terminator in the AC Connector (Figure 16).
·Fix the blue Neutral cable to the N(Neutral) terminator in the AC Connector.
·Fix the Line cable (brown or black wire) to the L(Line) terminator in the AC Connector.
Figure 16 AC Connector
Step3: Confirm that all the wires are fixed tightly( Figure 17).

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Figure 17
Step4: Fix the threaded sleeve (Figure 18).
Figure 18
Step5: Fix the pressure screw (Figure 19).
Figure 19
Step 6: Connect AC connector to inverter (Figure 20).

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Figure 20
6.6 Inverter Start-up
Only start inverter after checking following.
a. Make sure all the DC and AC breakers and Isolators are in off
position b. AC cable from inverter to connection point is done correct.
c. All PV panels are connected to inverter correctly, unused DC connectors should be sealed
using covers provided.
Starting inverter.
a. Turn ON AC MCB
b. Turn ON DC Isolator and then AC Isolator
b. Inverter will start up automatically when PV arrays generates enough energy. Inverter goes through the
following three stages during normal start-up.
Waiting: Inverter is waiting / checking PV arrays output DC voltage to be with adequate. At this time
DC voltage is with in range of DC100V-DC150V.
Checking: Inverter checks AC grid conditions automatically when DC input voltage exceeds Start-
up voltage. Inverter then goes through the start-up count down.
Normal: Inverter begins to operate normally with green light ON and feed power to grid,
LCD displays present output power. Inverter will stop feeding power to grid when PV output is not
enough for normal operation.