KStar KSG-1K-SM User manual

201603 Ver 1.0
Solar InverterSolar Inverter
User Manual
KSG-1K/1.5K/2K/3K-SM

Installation and Operation Manual 1
Table of Contents
1 User Guide..........................................................................................2
2 Safety Instructions.............................................................................3
3 Product Warranty...............................................................................5
4 Overvie ...........................................................................................6
4.1 Introduction of Grid-connected System.........................................6
4.2 Brief Introduction of PV Inverter...................................................7
4.3 Features Description......................................................................8
5 Installation....................,....................................................................9
5.1 Packing ..........................................................................................9
5.2 Installation of Inverter ...................................................................9
5.3 Installation Location....................................................................10
5.4 Installation Procedure..................................................................10
5.5 Wiring..........................................................................................12
5.6 Connection Procedure .................................................................14
6 Operation of Grid-connected Inverter.............................................15
6.1 Trial Operation....................,........................................................16
6.2 Working Status ............................................................................16
6.3 LED Display................................................................................18
6.4 LCD Display................................................................................19
6.5 Max Po er Point Tracking (MPPT)............................................23
7 Communication Interface................................................................24
7.1 RS232...........................................................................................24
7.2 RS485...........................................................................................24
7.3 Remote control ............................................................................25
8 Trouble Shooting.............................................................................26
9 Specification
. .....................................................................................28

Installation and Operation Manual 2
1 User Guide
It is appreciating that you purchase single-phase grid-connected inverter
produced by our company. The product is non-transforming type
inverter, features reliable performance and advanced technology. It
converts DC currents from solar arrays into AC currents then fed to
municipal Electrical Grid.
This manual contains important safety and operational instructions
that must be accurately understood and follo ed before operating the
products.
Please refer to this manual once there is any problem during
installation or operation. Please contact your local distributors or
agent if not recovered by yourselves.
Thank you again for using our products, please read this manual
completely and hope you are satisfied ith our products.
Please retain this manual for future reference.

Installation and Operation Manual 3
2 Safety Instructions
1. Electric Shock
The product has alternating current (AC) and direct current
(DC) connections, in order to avoid any electric shocks during
maintenance or before installation, please make sure the
disconnection of these AC or DC ports, grounded for solar
system and inverter.
2. Operation of Inverter
The product can be only operated or maintained by
professionals. The inverter can only be activated under such
situation: the housing or cover in good condition ithout any
damages, all scre s are tightened in right positions.
Before opening the inverters, it must be disconnected ith solar
array and Grid. In order to discharge completely from storage
capacitance, you can’t touch the inverter ithin at least 5
minutes after disconnection.
. Requirement for Grid Connections
These inverters are only used for supply po er for municipal
po er grid, and don’t try to connect any other energy resources
ith this inverter.
4. High Temperature Protection
During normal operation period, some parts (such as cooling
fins and cover) is heating. Sometimes it ill reach 60 . Please ℃
don’t touch these parts to avoid scald.
Only qualified electricians are allo ed to operate on
the inverter.
Only qualified electricians are allo ed to install the
inverter.
Do not carry out any iring and inspection or changing
components hen the po er supply is applied. Hazardous
voltages may still be present in the inverter even if the AC
and DC main s itches are s itched off. Wait at least 5

Installation and Operation Manual 4
minutes after s itching off the inverter. This ensures that
the capacitors are electrically discharged.
This product can cause a d c current in the external
protective earth conductor. Where a residual current-
operated protective (RCD) or monitoring (RCM) device is
strongly recommend to used for protection in a case of direct
or indirect contact, only an RCD or RCM of Type B is
allo ed on the supply side of this product;
Must be grounded before operation.
Ensure the proper grounding of the inverter, other ise, improper
connection or no grounding may cause stop of the inverter.
Ensure reliable installation and electrical connection.
When the photovoltaic generator cells are exposed to light (even
if it is dim), the generator supplies DC voltage to the inverter.
The recommended solar modules need to comply ith IEC61730
Class A rating.
The grid-tied solar inverters are only for crystalline silicon solar
modules.
In order to protect the PCE, user and installer, external DC and
AC circuit breaker shall be equipped at the end-use application;
The iring shall be according local electric code. Choose proper
cable for po er input and output lines. Input and output cable
shall be PV private cables suitable for outdoor use.
Only qualified cables under the local electrical safety la s and
regulations are allo ed to connect.

Installation and Operation Manual 5
Product Warranty
If you like to extend your arranty period, you can apply for it and
keep up arranty card ell. The maintenance is free of charge during
arranty period. The packing material should be original or similar
material hen the defective inverter is returned back to factory for
repairing.
This product is guaranteed to cover all shortage or damage due to
design, production, or components. But the arranty doesn’t cover the
follo ings:
* Beyond arranty period
* No effective arranty card and product’s series number
* Damage caused improper delivery
* Damage caused improper installation, unauthorized modification,
maintenance, or test, etc.
* Damage caused by orking in terrible environment hich is not
complied ith stipulations in this manual
* Damage caused not comply ith installation and operation range in
relative international standards or regulations
* Damage caused by unnatural environment

Installation and Operation Manual 6
P
V
P
ane
l
PV I
n
v
e
r
t
e
r
AC - Connection
Unit
F eeding AC po er to P ubli c U t ili ty onl y
-
+
DC -Input
AC-Output
G
r
i
d
( Public Utility )
4 Overview
4.1 Introduction of Grid-connected System
Basically Grid-connected system is comprised of 4 portions: PV array,
PV inverter, AC connection unit and Public Grid connection unit.
Once PV arrays receive sun shines, they ill generate DC current and
feed into PV inverter hich is configured bet een DC input and
municipal AC grid. Through converting DC into AC, the solar energy is
transmitted into municipal Electrical Grid.

Installation and Operation Manual 7
4.2 Brief Introduction of PV Inverter
The inverter coverts DC current from solar units into AC current,
and feeds to Municipal Electrical Grid. The inverter is designed and
produced as per relative requirement of la s and regulations. The
shape and functions of relative parts is described as follo s:
1. Company Logo: Name and identification of the company.
2. LCD display panel: display orking status and po er efficiency
etc information.
. LED and button: 2 LED indicates current orking status, 1 button
is used to s itch current LCD display information.
4. DC-S itch: (option).
5. Waterproof air valve ：To balance the internal and external
atmosphere.
6. AC output ports: The equipment is connected ith municipal Grid
through these ports. Please refer to “installation” section to make
clear of connection diagram.
2
．
LCD
display panel
1
．
Company Logo
3
．
LED
&
Button
4
．
DC
-
S itch
(option)
5
．
Waterproof air valve
8 ． RS485 port
7
．
RS
232
port
6
．
AC out
put port
9 ． DC input ports

Installation and Operation Manual 8
7. RS232 port: By this interface, user can use computer to
communicate ith the equipment. There is ater proof cover to
protect RS232 connectors.
8. RS485 port： To realize single inverter or multiple communications
via RS485 port or optional WIFI data logger.
9. DC input ports: Inverters have 2 pairs of DC ports, each pair of
input ports have positive (+) and negative (-) connector. Please
identify the positive and negative position by refer to “installation”
section.
4. Features Description
*
Beautiful shape design, easy installation
* Convenient maintenance, easy operation
* High transfer efficiency
*
High MPPT, Max MPPT>99.5%
*
High reliability
* Rich Man-Machine interface, LCD display and LED indication
* Standard RS232 connection and optional RJ45 communication
* Outdoor IP65 protective level

Installation and Operation Manual 9
5 Installation
5.1 Packing
Please check carefully before opening the package of the equipment. It
may cause the inverter damage in case the packing material is found
damage, please contact ith for arder for claim. If necessary, Please
feel free to contact us.
5.2 Installation of Inverter
Please read the follo ing installation instruction before you start your
ork so as to achieve best effect of the inverter.
1. In order to keep long life of inverter, the installation site should be
al ays kept dry.
2. Select suitable location to install the inverter, here is not so easy
for pedestrian to touch, but consider easy installation and easy
maintenance as ell.
. Make sure the inverter should be kept at least 30CM a ay from
other stuff.
4. Don’t directly expose the inverter under the sun light; high
temperature ill affect the inverter’s orking efficiency. When the
temperature keeps belo 40 , the inverter ill be in best℃ Working
status, the life of inverter ill be maximum.
5. Keep good ventilation so as to reduce heat accumulation
6. Once installing inverter in living environment, don’t mount it in
plastics plate or ooden plate to avoid noise, it is better to mount it
on the all.
7. The inverter generates heat during normal orking status; don’t
install it on flammable objects or near the place to store flammable
materials. Don’t install it near potential explosion area.

Installation and Operation Manual 10
5. Installation Location
1. The inverter is suitable to be installed on vertical or back ards tilt
all as sho n above, the tilt angle should be less 15°.
2. Don’t install inverter on for ard tilt all.
. Don’t install inverter on horizontal all.
4. Mount the inverter at height same as eyesight for easy operation
and data reading.
5.4 Installation Procedure
1. Use Φ10 driller kit to drill installation holes as per belo picture.
Please follo it exactly.

Installation and Operation Manual 11
2. Clean the dust inside the holes, and insert expansion pipe into the
holes. then turn the scre into the expansion pipe. The distance
bet een nut and all should be 10mm atleast.
. Hang the inverter onto scre s(from top to bottom), and check both
sides and keep the inverter in right position, then tighten scre s as
sho n in follo ing pictures.

Installation and Operation Manual 12
5.5 Wiring
Remove iring cover in the inverter, you ill see belo sho n
connection ports:
DC Input Connector for DC input, the polarity sequence is
positive, negative (+,-). Please find label ith polarity
markers.
RS-232 RS232 communication interface
DC S itch
To connect or disconnect “+” and “-” of PV array
input (option)
RS-485 RS485 can be connected ith PC via RS485/RS232
adaptor, or connected ith monitoring soft are via a data
logger in the form of daisy chain.
AC Output Connector for AC output, they are L, N and PE lines
Attention:
1. The ire connection can only be done after the inverter is fixed in
proper position on the all.
2. Make sure the Max. open circuit voltage and short circuit current of
solar arrays are not exceeded the stipulated range of the inverter.
. Select the inner diameter of 12AWG (4mm
2
) and the outer
diameter of Φ6mm of the photovoltaic cable as the connecting line
of the PV input terminal. Select the inner diameter of 12AWG
DC Input DC
S itch AC
Output
RS-232
RS-485

Installation and Operation Manual 13
(4mm
2
) and the outer diameter of Φ13mm of the photovoltaic cable
as the connecting line of the AC output terminal. Cables should
avoid high temperature, flame and rain ater henever possible.
4. During connecting the inverter, make sure no connection among
AC, DC and any po er resources. They also can not be connected
hen any accident occurs.
5. Identify the polarity of ires and connection ports first, then
connect the inverter ith solar arrays and municipal Electrical
Grid.
 Only qualified cables under the local electrical safety la s
and regulations are allo ed to connect.
Miniature circuit breakers
It is recommended strongly to install circuit breakers or fuses at the DC
input and AC output to ensure safe installation and running.
 In order to protect the PCE, user and installer, external DC
and AC circuit breaker shall be equipped at the end-use
application;
 The iring shall be according local electric code. Choose
proper cable for po er input and output lines. Input and
output cable shall be PV private cables suitable for
outdoor use.
Table: Miniature circuit breakers specifications
Model
DC input AC output
Recommended DC
breakers
Recommended AC
breakers
KSG-1K-SM 800V/16A 16A
KSG-1.5K-SM 800V/16A 16A
KSG-2K-SM 800V/16A 16A
KSG-3K-SM 800V/16A 16A

Installation and Operation Manual 14
Table: Wiring cable specifications
Model DC input AC output
Recommended DC cable Recommended AC cable
KSG-1K-SM 2.5mm
2
-4mm
2
2.5mm
2
-4mm
2
KSG-1.5K-SM 2.5mm
2
-4mm
2
2.5mm
2
-4mm
2
KSG-2K-SM 2.5mm
2
-4mm
2
2.5mm
2
-4mm
2
KSG-3K-SM 2.5mm
2
-4mm
2
2.5mm
2
-4mm
2
5.6 Connection Procedure
1. Connection with Municipal Electrical Grid
First disconnect ith municipal Grid by breaker, make sure it ill
not be connected again even due to accident. Put the terminal of L,
N, and PE into the port hich is ith mark. Then take the plug to
the inverter
2. Connection with Solar Array
In order to guarantee installation and operation of system
safety, external manual breaker has to be configured at DC side.
The selection of breaker should meet basic current and voltage
capacity. Mean hile, disconnect AC current first before disconnect
DC units.
Before connect the inverter ith solar Arrays, test max series
voltage of solar Arrays, hose value should not be over max input
voltage of inverter. Mean hile the short current of solar Arrays is
better not to exceed max DC current. Please check the polarity of
solar Arrays before the connection.
The positive of solar Arrays should be connected to positive
port in the inverter and the negative of solar Arrays should be
connected to negative port in the inverter.

Installation and Operation Manual 15
XXXXXX
XXXXXXXXXXXX
XXXXXX
6 Operation of Grid-connected
Inverter
LCD
Working LED
Error LED
Presss button

Installation and Operation Manual 16
6.1 Trial Operation
The inverter can be activated only after the follo ing inspections are
ell executed:
1. Correct connection for AC cables.
2. All solar arrays are connected ith the inverter correctly.
. Tighten all scre s.
4. Turn on the breaker bet een DC and AC.
5. The inverter ill automatically get started once PV arrays generate
enough voltage.
6.2 Working Status
Working status is divided into 3 kinds: normal orking status, faulty
status, and termination status.
1. Normal Working Status
There are t o modes: standby status and running status for this stage.
Under this mode, the system is running in normal status. Mean hile
tracking all functioning data to keep the system running in its best
status.
Once PV array’s voltage is less than start voltage,, the inverter ill
be in standby status, at this period the inverter starts to run and all
test functions get ready, but it doesn’t feed po er to municipal
Electrical Grid. When PV array’s voltage is higher than start
voltage,, the inverter ill transfer to running status after self test,
and mean hile start to feed energy to municipal Grid.

Installation and Operation Manual 17
The follo ing example sho s the process hen PV voltage is increased
from 120V:
Turn on the inverter, its model
and version ill be displayed
first.
The input voltage is less
than start voltage, the
inverter ill be in stand-by
status.
The input voltage is higher
than start voltage, the
inverter ill be in self-test
status.
After self testing, the
inverter ill be in normal
orking status (the data
only for reference).
Attention: Before connecting to DC, please make sure
input positive (+) and negative (-) connections are correct,
other ise the component of inverter ill be damaged,
hich may cause the inverter in abnormal operation status.
XXXXXX

Installation and Operation Manual 18
2. Fault Status
Inverter is al ays under intelligent monitoring condition after it
gets started. It ill become faulty status hen any fault occurs (such
as municipal voltage is overload, frequency is over range) or
components failure. The faulty information can be displayed by
LCD, at that time the red LED is on.
. Termination Status
When the output voltage from PV array is lo er than a certain
threshold, the inverter ill be in termination status. All LCD or
LED light ill be off, and no energy from inverter fed to
municipal Grid. Mean hile no energy consumption for inverter
itself, any actions on the keys (buttons) are invalid.
6. LED Display
In the front panel, here are 2 LED displays: RED light and GREEN
light. Under normal orking condition, GREEN light keeps on. The
display functions of these 2 LED lights are as follo s:
Working (GREEN light): it ill be on during normal orking status.
But it ill be off during night time hen no current is from solar
Arrays.
Error (RED light): it ill be on hen fault alarm occurs or
components failure. If you like to realize more error information,

Installation and Operation Manual 19
please refer to belo chapters.
6.4 LCD Display
1. Button and Back Lighting Operation
There are t o types of button press, short time press means pressing
the button less than 0.5 second, and long time press means pressing
the button more than 3 seconds. The short time press is used for
page up, moving the cursor; the long time press is used for locking
the screen, selecting item, setting and returning to upper menu.
The LCD back lighting ill be turned off 180 seconds after the latest
button press operation. To lighten the LCD back lighting, please
press the button again.
1. Working Mode Display
When the inverter is running in orking mode, the short time button
press can change the LCD display. What the LCD ill display hen
you press the button is sho ed belo .
Normal
SPEC: Italy
Model: XXXX