Omnik Omnikhyd Inverter 3KW User manual

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User MANUAL
InfiniSolar Inverter 3KW Omnikhyd Inverter 3KW

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1.0 Revision Summary
REVISION SECTION DESCRIPTION
Rev. A

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1. Scope of delivery
The manual provides safety guidelines, detailed planning and setup information. It provides
procedures for installing the inverter and information about operation and troubleshooting of
the unit. This manual does not contain details about photovoltaic (PV) panels. Please consult
with system integrator for the information.
2. Important Safety Instructions
SAVE THESE INSTRUCTIONS — this user manual contains important instructions that shall be
followed during the installation and maintenance of the InfiniSolar Inverters.
The following warnings identify conditions or practices that could result in personal injury or loss
of life.
1) Before installing and using the Solar Inverter, read all instructions and cautionary markings
on the inverter and all appropriate sections of this guide.
2) To reduce risk of fire hazard, do not cover or obstruct the inverter.
3) Under some conditions, the surface of Inverter case could be hot enough to cause skin
burns if accidentally touched. Ensure that the Inverter is located away from normal traffic
areas.
4) Use only accessories recommended or sold by the installer. Otherwise, not-qualified tool
may result in a risk of fire, electric shock, or injury to persons.
5) To avoid a risk of fire and electric shock, make sure that existing wiring is in good condition
and the wire is not undersized. Do not operate the Inverter with damaged or substandard
wiring.
6) Do not operate the Inverter if it has received a sharp blow, been dropped, or otherwise
damaged in any way. If the Inverter is damaged, call for an RMA (Return Material
Authorization)
7) Do not disassemble the Solar Inverter. It contains no user-serviceable parts. Attempting to
service the Solar Inverter yourself may result in a risk of electrical shock or fire and will void
warranty from manufacturer.
8) Authorized service personnel should reduce the risk of electrical shock by disconnecting
both the AC and DC power from the Inverter before attempting any maintenance or
cleaning or working on any circuits connected to the inverter. Turning off controls will not
reduce this risk. Internal capacitors can remain charged for 5 minutes after disconnecting
all sources of power.
9) Normally grounded conductors may be ungrounded and energized when a ground fault is
indicated.
followed during the installation and maintenance of the Omnikhyd Inverters.

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3. Introduction
InfiniSolar inverter is a hybrid PV inverter which consists of Grid input, PV input, battery
input, and AC output. The configuration is illustrated in Figure 1, showing the PV energy
has been feed back to grid, or used to charge the battery. It can supply power to load from
PV source, battery or both sources simultaneously.
Figure 1
Working Operations
1）Line mode（in Figure 2）
Figure 2
When the inverter is successfully connected to the grid, the inverter will operate in Line Mode.
Under this mode, when PV power is strong, the inverter will charge battery first and the
remaining power will feed to the grid and load.
When PV energy is too weak to charge battery, the inverter will get power from the grid to
charge battery.
Omnikhyd inverter is a hybrid PV inverter which consists of Grid input, PV input, battery

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2）BATTERY mode（in Figure 3）
Figure 3
Under this mode, the inverter is not able to connect to the grid. Either solar power or battery
power becomes major power source. When PV power is strong, the inverter will power load first
and the remaining power will charge battery. When PV power is too weak to charge battery or
power load, the inverter will convert battery power to supply loads.
3）PV charging mode（in Figure 4）
Figure 4
When the inverter is not connected to the grid and there is no load connected, PV power will
charge battery directly.
PV Compatibility
This hybrid inverter is designed to generate continuous power from three different power
sources, PV solar modules (solar panels), battery, and the grid, depending on different power
situations. When MPP input voltage of PV modules is within 150 VDC to 500 VDC, this hybrid
inverter is able to generate power to feed the grid and charge battery. This inverter is
compatible with PV module types of single crystalline and poly crystalline.
Note: When PV input voltage is lower than 250V, the power of inverter will de-rate.
Maximum Power Point Tracking (MPPT)

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The Solar Inverter is applied with Maximum Power Point Tracking (MPPT) technology to harvest
the maximum amount of energy from the solar panel.
Measurement must be taken to ensure that the maximum open circuit voltage of 500 VDC is
never exceeded. Please note that the maximum open-circuit voltage will occur at the lowest
temperatures anticipated. You will find more detailed information about temperature
dependency in the data sheet of the PV modules.
Standard Features
The Solar Inverter has the following standard features:
zProvides comprehensive data with easy-to-read graphic design in LCD display
zGround Fault Current Interruption, which is also known as RCD (Residual Current Device).
To prevent electrical hazard, a current transformer is used to monitor the different
current between L and N. When current difference is larger than specified value stated in
section “General Data”, inverter will cut its output to grid.
zBundled software to remote access the inverter data
zProvides standard RS485 communication and optional communication cards

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4. Equipment overview
FRONT VIEW
BACK VIEW
A: PV input connector
B: Grid input connector
C: battery input connector
D: AC output connector
E: Grounding
F: RS-232 Communication port
B
A
CGHF
E
D

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G: Intelligent slot
H: Parallel connector
5. Installation
5.1 Installation location
zDo not mount the inverter on flammable construction materials.
zMount on a solid surface
zHigh temperature may cause a power reduction due to excessive heating.
zInstall this inverter at eye level in order to allow the LCD display to be read at all times.
zDusty conditions on the unit may impair the performance of this inverter.
5.2 Minimum requirements
zFor proper air circulation to dissipate heat, allow a clearance of approx. 20 cm to the side
and approx. 50 cm above and below the unit.
zFor proper operation of this inverter, please use appropriate cables (cable length,
cable cross-section) for grid impedance requirement at the supply terminal.
zThe recommended installation position is to be adhered to (vertical).
5.3 Installation
Installation to the wall should be implemented with the proper screws so that the solar inverter
can be easily attached to the wall. After that, the device should be bolted on securely.
Assembly instructions:
zSelect an appropriate mounting location. Install the solar inverter in a protected area that is
free of excessive dust and has adequate air flow. Do NOT operate it where the temperature
and humidity is outside the specific limits. (Please check the specs for the limitations.)
zDrill four holes in the marked locations with four screws. (see Fig. 1 & Fig. 2) Place the unit
on the surface and align the mounting holes with four screws.
zCheck if the solar inverter is securely fixed.

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Figure 1 Figure 2
5.4 Ambient temperature
The solar inverter can be operated in an ambient temperature between 0℃to +40℃.
5.5 Grid Connection
Measure grid voltage and frequency. It should be 230VAC, 50HZ, and single phase.
Open the breaker or fuse between the inverter and utility. Connect AC wires as table 1 list.
Connectors wire suggestion
PV PV+ A:+
12AWG or 4mm2
PV- A:-
GRID L B:L1 N B:N
GROUND E
BATTERY BAT+ C:POS+ 6AWG or 15mm2
BAT- C:NEG-
AC OUTPUT L D:L 12AWG or 4mm2N D:N
GROUND D:GROUND
WALL

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Table 1
To prevent risk of electric shock, ensure the ground wire is properly earthed before operating
the solar inverter.
5.6 Connection of PV modules
Before the photovoltaic system is connected, the polarity of the PV voltage must be checked to
ensure that it is correct. Connect PV wires as table 1 list.
Please ensure the following at all times:
zThat there is never any risk of anyone coming intocontact with the solar inverter connection
terminals, due to the risk of dangerous voltages across them.
zNever disconnect running inverter from PV modules. If it’s necessary, first switch the grid
off so that the solar inverter cannot absorb any further power.
The maximum input voltage of the solar inverter is 500V.
5.7 Connection of battery
Please ensure that he nominal battery voltage is 48Vdc first. Open the breaker or fuse between
the inverter and battery. Connect battery wires as table 1
5.8 Connection of the AC output to the load
Connect output wires to the load as table 1.
6. Commissioning
6.1 Startup Procedure
Check the following requirements before commissioning:
zCheck DC voltage of PV modules
Uncover the PV modules and expose them to full sunlight. The sunlight must be intense
enough to produce the required PV output voltage.
Measure Open Circuit DC Voltage of PV modules via DC positive (+) and DC negative (–)
terminals. This voltage must be within 150 VDC to 500VDC to energize the inverter
electronics and prevent damage to input circuitry of the.
zCheck AC utility voltage
Switch ON the main and inverter Circuit breakers in the main utility electrical service panel.

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Using an AC voltmeter, measure the AC open circuit utility voltage between L and
N. Ensure this voltage is at approximately nominal value expected for the local
utility company.
zCheck battery voltage
Ensure that battery voltage is at approximately nominal value expected for inverter(48Vdc).
zThe line breaker and battery breaker are correctly rated
zBefore switching on the power, check all feeders and connections again.
zStart up the inverter by switching the breaker of PV, Grid and battery to “ON’ status.
The LCD will display the device state. Keep pressing the ON key continuously until
the buzzer continuously sound. Then, the inverter will be turned on. If you want to turn off
the inverter, simply keep pressing the OFF key continuously until the buzzer continuously
sound.
7. Monitoring the Inverter
7.1 LCD Information Define
NOTICE: To accurately monitor and calculate the energy generation, please calibrate the timer
of this unit via software every one month. For the detailed calibration, please check the user
manual of bundled software.
NOTIEC: There is a battery inside of control board. It’s recommended to replace the battery
every 5 years. Check the replacement procedure in Maintenance section.
Displa
y
Function
Indicates AC input volta
g
e or frequency.
Vac: voltage, Hz: frequency
Indicates AC output
power, voltage, frequency, or Load
percentage.
KW: power, Vac: Voltage, Hz: frequency, %:
Load percentage
Indicates PV input volta
g
e or power.
Volt: voltage, KW: power

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Indicates battery voltage or percentage.
Volt: voltage, %: percentage
Indicates charging current to battery.
Indicates that the warning occurs.
Indicates that the fault occurs.
Indicates fault code in fault mode or WR for
warning situation.
Indicates date and time, or the date and
time you set for querying energy generated.
Indicates solar panels.
Indicates grid.
Indicates battery.
Indicates load.
Indicates energy generated.
7.2 Button Definition
This display is operated by four buttons.
Button Function
Up ¾Press this button to select last selection or
increase value.
Down ¾If it
’
s in que
r
y menu, press this button to
select next selection or decrease value.
¾Press this button to mute alarm in
standby mode.
ENTER/ON ¾Press to enter query menu.
¾If it’s in query menu, press this button to
confirm selection or entry.
¾Keep press this button continuously until
the buzzer long time sound, inverter turn on
the AC output.
ESC
/
OFF ¾Press to return to last menu.
¾Keep press this button continuously until
the buzzer long time sound, inverter turn off
the AC out
p
ut.
NOTE: If backlight shuts off, you may activate it by pressing any button. When an error occurs,
the buzzer will continuously sound. You may press any button to mute it.

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7.3 Query Menu Operation
This display shows current values of your system. This displayed values can be changed in query
menu via button operation. Press “Enter” button to enter query menu. There are seven query
selections:
zGrid voltage or frequency of AC input
zFrequency, voltage, power or load percentage of AC output
zInput voltage or power of PV input.
zBattery voltage or capability percentage.
zDate and time.
zToday or total energy generated.
zMode of query energy generated.
Setting Display Procedure
zInput voltage or frequency of AC input
Procedure
1.
Enter
Up
Down
Up
Down
EnterEnter
2.
3.
4.
5.
zFrequency, voltage, power or percentage of AC output
Procedure
1.
Enter
Up
Down
Up
Down
EnterEnter
2. 3.
4.
5.

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zInput voltage or power of PV input.
Procedure
1.
Enter
Up
Down
Up
Down
EnterEnter
2. 3.
4.
5.
zBattery voltage or percentage.
Procedure
1.
Enter
Up
Down
Up
Down
EnterEnter
2.
3.
4.
5.
zDate and time.
Procedure

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zToday or total energy generated.
Procedure
zMode of query energy generated.
Energy generation display of selected day
Procedure:
LCD Display:
Energy generation display of selected month
Procedure:
LCD Display:

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Energy generation display of selected year
Procedure:
1.
Enter
Up
Down
Up
Down
Enter
2.
3.
4. 5.
Enter
Flashes
Enter Up Down
Enter
Esc
Returns to main menu
Sets year
LCD Display:

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7-4. Device status & Display
Status LCD Display
PV module and battery are
connected and working well, but
it’s not connected to grid.
Inverter is charging battery from
PV energy.
The utility icon flashes.
PV module and battery are
connected and working well, but
it’s not connected to grid.
Inverter is powering loads from
PV and battery energy.
The utility icon flashes. Battery is charging or
dischar
g
in
g
base on the PV in
p
ut
p
ower.
PV module is feeding power to
the grid and the inverter is not
connected to battery.
The battery icon flashes.
PV module is feedin
g
power to
the grid and load. The inverter is
not connected to battery.
The battery icon flashes.
T
he inverter is not connected to
battery. When PV energy is weak,
PV module and the utility will
power the load at the same time.
The battery icon flashes.
When PV energy is strong, PV
module is feeding power to the
grid, load and charging battery.

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WARNING: There are no use
r
-replaceable parts inside of the inverter. Do not attempt
to service the unit yourself.
When PV energy is weak, PV
module and the utility will power
the load and charge battery.
T
here is no PV power available
and inverter is not connected to
grid. All loads are powered from
battery energy.
The utility icon flashes.
When PV energy is loss, the utility
is powering the load and charging
battery.
The PV icon flashes.
When there is load connected, the utility will power the load
and the load icon will show u
p
in the LCD dis
p
la
y
.
8. Maintenance & Cleaning
Check the following points to ensure proper operation ofwhole solar system at regular intervals.
zEnsure the inverter’s inlet and outlet is clean all the time.
zClean the PV modules, during the cool time of the day, whenever it is visibly dirty.
zPeriodically inspect the system to make sure that all wires and supports
are securely fastened in place.
9. Warning Situation
There are 5 situations defined as warnings. When a warning situation occurs, icon will flash
and the fault code area will display “WR” wordings.
No PV module is connected flash failure
Inverter initial failure Line loss
Islandin
g
is detected
Fault Reference Codes
When a fault occurs, the icon will flash as a reminder. See below for fault codes for
reference.
Fault event Fault code Icon
(
flashin
g)

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Over voltage on Bus 1
Under voltage on Bus 2
Time out for Bus soft start 3
T
ime out for Inverter soft start 4
Inverter over current 5
Over temperature 6
Relay fault 7
Output current sensor failure 8
High voltage on PV module 9
Power down 10
DC input over current 11
GFCI failure 12
PV insulation failure 13
Inverter DC current ove
r
14
Line value consistent fail between MCU & DSP 15
GFCI sensor failure 16
Connection failure between MCU & DSP 17
Communication failure between MCU & DSP 18
Ground loss 19
Dischar
g
e failure 20
T
ime out for dischar
g
e soft start 21
Battery over volta
g
e 22
Over load 23

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10. Specifications
Item Specification Comments
AC input data
AC start voltage 120~140Vac
Auto restart voltage 194 Vac Tolerance ±3%
AC input voltage range 184~265 Vac
AC input voltage comeback value 194Vac / 255Vac
AC input frequency range 47.5 ～50.2 Hz Hz
AC input frequency comeback value 47.6Hz / 50.1Hz
Max. AC Input current 20Amp
PV input data
Max. DC Power 3200W
Nominal DC voltage 360Vdc
Max. Input voltage
(Maximum PV open voltage) 500Vdc
System start-up voltage 116V ±10V whether PV establish control power
Initial feeding voltage 150V ±5%
Working voltage range 100(±5%) ~ 500 Vdc
(-5%+0%) Which is the DC voltage range that
inverter can feed power to grid
MPPT voltage range 250 ~ 450Vdc
Shutdown voltage <70V typical
Max. DC Input current 13Amp
Converting Power Vs PV Voltage
0
0.2
0.4
0.6
0.8
1
1.2
100 150 200 250 300 350 400 450 500
PV Voltage(V)
Converting
Power(Percentage)
The relation of input PV voltage and
output feed power is shown in figure.
Once input V is less than 250V , the
relation of I/P V and load % is
i
VLoad ×
=
4.0%
Once input V is higher than 450V ,
the relation of I/P V and load % is
i
VLoad )450(016.01% −×−=
Grid Output data
Nominal output voltage 230Vac
Max feeding power 3000W
Output voltage range 184 ~ 265 Vac
Output voltage comeback value 194Vac / 255Vac
Operational frequency range 47.5 ～50.2 Hz
Output frequency comeback value 47.6/50.1