OmniPower OHY1P4803 User manual

USER MANUAL
V2.2
3kW Hybrid Inverter
OHY1P4803

Table of Contents
i www.sinetech.co.za
Table of Contents
1. Introduction ...........................................................................................1
2. Important Safety Warning.....................................................................2
3. Unpacking & Overview...........................................................................4
3-1. Packing List........................................................................................ 4
3-2. Product Overview ............................................................................... 4
4. Installation.............................................................................................5
4-1. Selecting Mounting Location................................................................ 5
4-2. Mounting Unit .................................................................................... 5
5. Grid (Utility) Connection........................................................................7
5-1. Preparation ........................................................................................ 7
5-2. Connecting to the AC Utility ................................................................ 7
6. PV Module (DC) Connection...................................................................9
7. Battery Connection ..............................................................................11
8. Load (AC Output) Connection ..............................................................13
9. Communication ....................................................................................14
10. Commissioning...................................................................................15
11. Initial Setup .......................................................................................16
12. Operation ...........................................................................................31
12-1. Interface ........................................................................................ 31
12-2. LCD Information Define .................................................................. 31
12-3. Button Definition ............................................................................ 33
12-4 Query Menu Operation..................................................................... 33
12-5. Operation Mode & Display............................................................... 38
13. Charging Management.......................................................................44
14. Applications with Energy Meter .........................................................46
15. Maintenance & Cleaning ....................................................................47
16. Trouble Shooting................................................................................48
16-1. Warning List................................................................................... 48
16-2. Fault Reference Codes .................................................................... 49
17. Specifications .....................................................................................54
18. Limited Product Warranty..................................................................56

1. Introduction
1 www.sinetech.co.za
1. Introduction
This hybrid PV inverter can provide power to connected loads by utilizing PV power, utility
power and battery power.
Hybrid inverter
Figure 1: Basic Hybrid PV System Overview
Depending on different power situations, this hybrid inverter is designed to generate
continuous power from PV solar modules (solar panels), battery, and the utility. When MPP
input voltage of PV modules is within acceptable range (see specification for the details), this
inverter is able to generate power to feed the grid (utility) and charge battery. This inverter
is only compatible with PV module types of single crystalline and poly crystalline. Do not
connect any PV array types other than these two types of PV modules to the inverter. See
Figure 1 for a simple diagram of a typical solar system with this hybrid inverter.
Note: When PV input voltage is lower than 250V for 3KW and 3KW plus and 150V for 2KW,
the PV input power will de-rate.
PV modules
Battery
Distribution Board
Electricity grid
Load

2. Important Safety Warning
2 www.sinetech.co.za
2. Important Safety Warning
Before using the inverter, please read all instructions and cautionary markings on
the unit and this manual. Store the manual where it can be accessed easily. This
manual is for qualified personnel. The tasks described in this manual may be performed by
qualified personnel only.
General Precaution –Conventions Used:
WARNING! Warnings identify conditions or practices that could result in personal injury.
CAUTION! Caution identifies conditions or practices that could result in damage to the
unit or other equipment connected.
WARNING! Before installing and using this inverter, read all instructions and cautionary
markings on the inverter and all appropriate sections of this guide.
WARNING! Normally grounded conductors may be ungrounded and energized when a
ground fault is indicated.
WARNING! This inverter is heavy. It should be lifted by at least two persons.
CAUTION! Authorized service personnel should reduce the risk of electrical shock by
disconnecting AC, DC and battery 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.
CAUTION! Do not disassemble this inverter yourself. It contains no user-serviceable parts.
Attempting to service this inverter yourself may cause a risk of electrical shock or fire and
will void the warranty from the manufacturer.
CAUTION! To avoid the risk of fire and electric shock, make sure that existing wiring is in
good condition and that the wire is not undersized. Do not operate the Inverter with damaged
or substandard wiring.

2. Important Safety Warning
3 www.sinetech.co.za
CAUTION! Under high temperature environment, the cover of this inverter could be hot
enough to cause skin burns if accidentally touched. Ensure that this inverter is away from
normal traffic areas.
CAUTION! Use only recommended accessories from installer. Unsuitable tools or
instruments may cause risk of fire, electric shock, or injury to persons.
CAUTION! To reduce risk of fire hazard, do not cover or obstruct the cooling fans.
CAUTION! Do not operate the Inverter if it has been severely knocked, dropped, or otherwise
damaged in any way. If the Inverter is damaged, please contact your supplier.
Symbols used in Equipment Markings
Refer to the operating instructions
Caution, risk of danger
Caution, risk of electric shock
Caution, risk of electric shock, Energy storage timed discharge
Caution, hot surface

3. Unpacking & Overview
4 www.sinetech.co.za
3. Unpacking & Overview
3-1. Packing List
Before installation, please inspect the unit. Ensure that nothing inside the package is
damaged. You should have received the following items inside your package:
Inverter unit Software CD Manual USB cable
3-2. Product Overview
1) PV connectors
2) Grid connectors
3) Battery connectors
4) AC output connectors (Load connection)
5) RS-232 communication port
6) USB communication port
7) Intelligent slot
8) Ground connection
9) LCD display panel (Please check section 10 for detailed LCD operation)
10) Control buttons

4. Installation
5 www.sinetech.co.za
4. Installation
4-1. Selecting Mounting Location
Consider the following points before selecting where to install:
Do not mount the inverter onto flammable materials.
Mount on a solid surface
This inverter can emit noise during operation which may be perceived as a nuisance in
a living area.
Install the inverter at eye level to allow easy reading of the LCD display.
For proper air circulation to dissipate heat, allow a clearance of ± 20 cm to the sides
and ± 50 cm above and below the unit.
Dusty conditions will impair the performance of this inverter.
The ambient temperature should be between 0°C and 40°C and relative humidity
should be between 5% and 85% to ensure optimal operation.
A vertical installation position is to be adhered to.
For proper operation of this inverter, please use appropriate cables for grid
connection.
The pollution degree of the inverter is PD2. Select an appropriate mounting location.
Install the solar inverter in a protected area that is dry, free of excessive dust and has
adequate air flow. Do NOT operate it where the temperature and humidity is beyond
the specification limits. (Please check the specs for the limitations.)
Installation position shall not impede access to all the connections.
This inverter has an IP20 rating: for indoor applications only.
Regularly clean the fan filter.
4-2. Mounting Unit
WARNING!! This inverter is heavy! Please be careful when lifting!
Installation to the wall should be implemented with the proper bolts. The device should be
bolted on securely.
The inverter only can be used in an ENCLOSED ELECTRICAL OPERATING AREA.
WARNING!! FIRE HAZARD.
TO BE MOUNTED ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACES ONLY.

4. Installation
6 www.sinetech.co.za
1. Drill four holes in the marked
locations with four screws.
2. Place the unit on the surface and align
the mounting holes with the four screws.
3. Check that the solar inverter is firmly
secured.
Note: Recommended specs for screws.

5. Grid (Utility) Connection
7 www.sinetech.co.za
5. Grid (Utility) Connection
5-1. Preparation
Before connecting to AC utility, install a separate AC circuit breaker between inverter and
AC utility. This will ensure the inverter can be securely disconnected for maintenance and is
fully isolated from the AC input.
NOTE1: Although this inverter is equipped with a 250VAC/30A fuse, it’s still necessary to
install a separate circuit breaker for safety consideration. Use a 250VAC/30A circuit breaker
between inverter and AC utility.
NOTE2: The overvoltage category of the AC input is III. It should be connected to a power
distribution board.
WARNING! It's very important for system safety and efficient operation to use appropriate
cable for grid (utility) connection. To reduce risk of injury, use the recommended cable size
as below:
Suggested cable requirement for AC wire
Model
2KW
3KW
3KW Plus
Nominal Grid Voltage
101/110/120/127 VAC
208/220/230/240 VAC
Conductor cross-section (mm2)
4 to 6 mm²
AWG no.
10 to 12
5-2. Connecting to the AC Utility
Step 1: Check the grid voltage and frequency with a voltmeter. It should be the same as
“VAC” values on its label.
Step 2: Turn off the circuit breaker.
Step 3: Remove insulation sleeve 8 mm for three conductors.
Chart 1
Reduce de-insulated L and neutral conductors to 3 mm. Refer to
chart 1.
Step 4: Connect wires according to polarities indicated on terminal block. Be sure to connect
PE protective conductor ( ) first.

5. Grid (Utility) Connection
8 www.sinetech.co.za
L→LINE (brown or black)
→Ground (yellow-green)
N→Neutral (blue)
Step 5: Make sure the wires are securely connected.
The tightening torque is 0.8 N.m.
Step 6: For safe operation, please use one additional wire with a ring terminal to connect
ground. Refer to Chart 3.
Ring terminal:
Chart 3
Recommended wire and terminal size:
Wire Size
Ring Terminal
Torque
Cable mm2
Dimensions
D (mm)
L (mm)
10 AWG
6
4.3
21.8
1.2 to 2 Nm
CAUTION: To prevent risk of electric shock, ensure the ground wire is properly earthed
before operating this hybrid inverter , regardless if the grid is connected or not.
Chart 2

6. PV Module Connection
9 www.sinetech.co.za
6. PV Module (DC) Connection
CAUTION: Do NOT connect battery or any other DC source to PV connectors. This will
cause inverter damage, which is NOT covered by warranty.
CAUTION: Before connecting the PV modules, install a DC circuit breaker or fuse
separately between inverter and PV modules. (Should be part of the combiner box)
NOTE 1: Please use 600VDC/20A circuit breaker for 3KW, 600VDC/25A for 3KW Plus;
500VDC/25A for 2KW.
NOTE 2: The overvoltage category of the PV input is II.
Please follow below steps to implement PV module connection:
WARNING: Because this inverter is not isolated, only three types of PV modules are
acceptable: Only class A-rated, mono crystalline, poly crystalline or CIGS modules. To
avoid any malfunction, do not connect any PV modules with a possible leakage current to
the inverter. For example, grounded PV modules will cause leakage current to the
inverter. When using CIGS modules, be sure NOT to ground them.
CAUTION: A PV combiner box with fuses and surge protection is required. Otherwise,
lightning can cause inverter damage.
Step 1: Check the input voltage of PV array modules. The acceptable input voltage of the solar
inverter is 250VDC - 450VDC for 3KW/3KW Plus and 150VDC-320VDC for 2KW. This system
is only supplied for one PV string. Make sure that the maximum current to the PV input
connector does not exceed 13A for 3KW, 18A for 3KW Plus and 15A for 2KW.
CAUTION: Exceeding the maximum input voltage can destroy the unit!! Check the system
before wire connection. Not covered by warranty.
Step 2: Disconnect the circuit breaker.
Step 3: Remove insulation sleeve 10 mm for positive and
negative conductors. Refer to chart 4. Chart 4

6. PV Module Connection
10 www.sinetech.co.za
Step 4: Confirm correct polarity of cable from PV modules
and PV input connectors. Connect positive pole (+) of cable
to positive pole (+) of PV input connector. Connect negative
pole (-) of cable to negative pole (-) of PV input connector.
Step 5: Make sure the wires are securely connected.
The tightening torque is 1.2 N.m.
WARNING! For system safety and efficient operation use only appropriate UV protected cable
for PV module connections. To reduce risk of injury, please use the proper recommended
cable size as below.
Conductor cross-section (mm2)
AWG no.
4 to 6
10 ~ 12
CAUTION: Never touch terminals of the inverter! It will cause lethal electric shock.
CAUTION: To avoid electric shock, do NOT touch the inverter. When PV modules are
exposed to sunlight, they will generate DC voltages.

7. Battery Connection
11 www.sinetech.co.za
7. Battery Connection
CAUTION: Before connecting to batteries, install a separate DC fuse or circuit breaker
between inverter and batteries.
NOTE: Only use sealed or vented lead acid or Gel batteries. Please check maximum charging
voltage and current when commissioning this inverter. For Lithium iron or NiCad batteries,
consult with installer for applicable details.
NOTE: Use 60VDC/100A fuse / circuit breaker for 3KW/3KW Plus and 60VDC/80A fuse /
circuit breaker for 2KW.
Please follow below steps to implement battery connection:
Step 1: Check the nominal voltage of batteries. The nominal input voltage for hybrid inverter
is 48VDC.
Step 2: Use two battery
cables. Remove
insulation sleeve 12 mm
and insert conductor into
ring terminal. Refer to
chart 6.
Step 3: Follow the battery polarity guide printed near
the battery terminals! Place the battery cable ring lug
terminal over the battery terminal. Refer to Chart 7.
Chart 6
Chart 7
RED cable to the positive terminal (+);
BLACK cable to the negative terminal (-).
Step 4: Make sure the wires are securely connected. The tightening torque is 2 N.m.

7. Battery Connection
12 www.sinetech.co.za
To reduce risk of injury, use recommended cable sizes as indicated below:
WARNING! It's very important
for system safety and efficient
operation to use appropriate
cables for battery connection.
Model
2KW
3KW,3KW Plus
Nominal Grid Voltage
101/110/120/127 VAC
208/220/230/240 VAC
Conductor cross-section (mm2)
25
35

8. Load Connection
13 www.sinetech.co.za
8. Load (AC Output) Connection
CAUTION: To prevent continued supply to the load from the inverter during any mode of
operation, a disconnection device must be installed in the building distribution box
WARNING! It's very important for system safety and efficient operation to use the
appropriate cable for AC connection. To reduce risk of injury, use the recommended cable
size as listed below:
Model
2KW,
3KW
3KW Plus
Nominal Grid Voltage
101/110/120/127 VAC
208/220/230/240 VAC
Conductor cross-section (mm2)
4 ~ 6
AWG no.
10 ~ 12
Step 1: Remove insulation sleeve 8 mm for three
conductors. Shorten L and N conductors to 3 mm.
Refer to chart 8 (right) .
Step 2: Connect wires according to polarities indicated on terminal block.
Be sure to connect PE protective conductor ( ) first
Refer to Chart 9
L→LINE (brown or black) Chart 9
→Ground (yellow-green)
N→Neutral (blue)
Step 3: Make sure the wires are secure. The tightening torque is 0.8 N.m.
CAUTION: Connect load ONLY to “AC Output Connector”. NEVER connect the utility to
“AC Output Connector”.
CAUTION: Be sure to connect L terminal of load to L terminal of “AC Output Connector” and
N terminal of load to N terminal of “AC Output Connector”. The G terminal of “AC Output
Connector” is connected to ground of the load.
CAUTION: This inverter is not allowed to operate in parallel with another unit. This will
damage the inverter, and is not covered by warranty!

9. Communication
14 www.sinetech.co.za
9. Communication
The inverter is equipped with RS232 and USB ports and it is also equipped with a slot for
alternative communication interfaces in order to communicate with a PC with corresponding
software. This intelligent slot is suitable to install with SNMP card and Modbus card. Follow
below procedure to connect communication wiring and install the software.
For RS232 port, you should use a DB9 cable as follows:
For USB port, you should use a USB cable as follows:
For SNMP or MODBUS card, you should use RJ45 cables as follows:
Please install monitoring software in your computer. Detailed information is listed in the next
chapter. After software is installed, you may start the monitoring software and extract data
through communication port.

10. Commissioning
15 www.sinetech.co.za
10. Commissioning
Step 1: Check the following before commissioning:
Ensure the inverter is firmly secured
Does the open circuit voltage of PV modules meet requirements (Refer to Section 6)
Check if the utility voltage is approximately the same as the nominal expected value
Check if connection of AC cable to grid (utility) is correct if the utility is required.
Check all connections to the PV modules.
Confirm that AC circuit breaker (only applicable if utility is required), battery fuse/circuit
breaker, and DC fuse/circuit breaker are installed correctly.
Step 2: Switch on the battery circuit breaker and then switch on PV DC breaker. After that, if
there is a utility connection, switch on the AC circuit breaker. By now, the inverter is turned
on. However, there is no output generated for loads. Confirm:
If LCD lights up to display the current inverter status, commissioning has been
successfull. After pressing the “ON” button for 1 second when the utility is detected, the
inverter will start to supply power to the loads. If no utility exists, simply press the “ON”
button for 3 seconds. Then, the inverter will start to supply power to the loads.
If red LED lights up, or warning/fault indicator appears in LCD, an error has occurred.
Please inform your installer.
Step 3: Please insert CD into your computer and install monitoring software.
Follow below steps to install software:
1. Follow the on-screen instructions.
2. When your computer restarts, the monitoring software will appear as a shortcut icon
located in the system tray, near the clock.
NOTE: If using Modbus card as communication interface, please contact your local dealer for
details.

11. Initial Setup
16 www.sinetech.co.za
11. Initial Setup
Before inverter operation, set up “Operation Mode” via software. Follow the steps below very
closely. For more details, please check software manual.
Step 1: After turning on the inverter and installing the software, please click “Open Monitor”
to enter main screen of this software.
Step 2: Log into software first by entering default password “administrator”.
Step 3: Select Device Control >> MyPower Management. This is where you set up inverter
operation mode and personalized interface. Refer to diagram below.
Modes
There are three operating modes: Grid-tie with backup, Grid-Tie and Off-Grid.
Grid-tie with backup: PV power can feed back to grid, provide power to the load
and charge battery. There are four options available in this mode: Grid-tie with
backup I, II, III, IV and V. In this mode, users can configure PV power supply
priority, charging source priority and load supply source priority. However,
when Grid-tie with backup IV option is selected in PV energy supply priority, the

11. Initial Setup
17 www.sinetech.co.za
inverter is only operated between two working logics based on defined peak time
and off-peak time of electricity. Only peak time and off-peak time of electricity are
able to be set up for optimized electricity usage.
Grid-Tie: PV power only can feed back to the grid.
Off-Grid: PV power only provides power to the load and to charge battery. No
feedback to grid is allowed.
SECTION A:
Standard: This will list local grid standard. A factory password is required to make any
changes. Please check with your distributor only when this standard change is requested.
CAUTION: Incorrect settings can cause damage or render unit inoperable.
Nominal Output Voltage: There are 5 options for high voltage system: 240V, 230V,
220V, 208V and 202V. For low voltage system, there are four options: 127, 120, 110
and 101.
Nominal Output Frequency: There are two options to select: 50HZ or 60HZ.
SECTION B:
This section contents may be different based on the operation selected.
If battery voltage <xx.x V. AC starts charging: When selected, and battery voltage is
lower than setting (xx.x V), AC will start to charge battery. If this condition is selected,
voltage setting can be changed. Otherwise, it is impossible to enter any values.
Allow AC charging duration: This is the time period during which AC (grid) is allowed to
charge battery. When the duration is set up as 0:00-00:00, there is no time limit for AC
to charge battery.

11. Initial Setup
18 www.sinetech.co.za
AC output ON/Off Timer: Set up on/off time for AC output of inverter. If setting is
00:00/00:00, this function is disabled.
Allow to charge battery: This option is automatically determined by setting in “Charging
source”. It cannot be modified here. When “NONE” is selected in the charging source
section, this option becomes unchecked as grey text.
Allow AC to charge battery: This option is automatically determined by setting in
”Charging source”. It cannot be modified here. When “Grid and PV” or “Grid or PV” is
selected in charging source section, this option is default selected. Under Grid-tie mode,
this option is invalid.
Allow to feed into the Grid: This option is only valid under Grid-tie and Grid-tie with
backup modes. Users can decide if this inverter should feed into the grid.
Allow battery to discharge when PV is available: This option is automatically determined
by setting in “Load supply source (PV is available)”. When “Battery” is higher priority
than “Grid” in Load supply source (PV is available), this option is default selected. Under
Grid-tie, this option is invalid.
Allow battery to discharge when PV is unavailable: This option is automatically
determined by setting in “Load supply source (PV is unavailable)”. When “Battery” is
higher priority than “Grid” in Load supply source (PV is unavailable), this option is default
selected. Under Grid-tie mode, this option is invalid.
Allow battery to feed-in to the Grid when PV is available: This option is only valid in
Grid-tie with backup II or Grid-tie with backup III modes.
Allow battery to feed-in to the Grid when PV is unavailable: This option is only valid in
all options of Grid-tie with backup mode.