EPS 5KW
INVERTER / CHARGER
Version: 1.0
User Manual
Table of Contents
ABOUT THIS MANUAL ..................................................................................................................................... 1
Purpose ............................................................................................................................................................ 1
Scope ............................................................................................................................................................... 1
SAFETY INSTRUCTIONS .................................................................................................................................. 1
INTRODUCTION ............................................................................................................................................... 2
Features ........................................................................................................................................................... 2
Basic System Architecture ............................................................................................................................... 2
Product Overview ............................................................................................................................................. 3
INSTALLATION ................................................................................................................................................. 4
Unpacking and Inspection................................................................................................................................ 4
Installation ........................................................................................................................................................ 4
Rack Mounting ................................................................................................................................................. 4
Battery Connection .......................................................................................................................................... 5
AC Input/Output Connection ............................................................................................................................ 6
Communication Connection ............................................................................................................................. 7
OPERATION ....................................................................................................................................................... 8
Power ON/OFF ................................................................................................................................................ 8
Operation and Display Panel ........................................................................................................................... 8
LCD Display Icons ........................................................................................................................................... 9
LCD Setting .................................................................................................................................................... 11
Display Setting ............................................................................................................................................... 13
Operating Mode Description .......................................................................................................................... 14
Fault Reference Code .................................................................................................................................... 15
Warning Indicator ........................................................................................................................................... 15
SPECIFICATIONS ........................................................................................................................................... 16
TROUBLE SHOOTING ..................................................................................................................................... 18
Appendix I: Parallel function ....................................................................................................................... 19
Appendix II: Approximate Back-up Time Table ....................................................................................... 30
1
ABOUT THIS MANUAL
Purpose
This manual describes the assembly, installation, operation and troubleshooting of this unit. Please read
this manual carefully before installations and operations. Keep this manual for future reference.
Scope
This manual provides safety and installation guidelines as well as information on tools and wiring.
SAFETY INSTRUCTIONS
WARNING: This chapter contains important safety and operating instructions. Read and
keep this manual for future reference.
1. Before using the unit, read all instructions and cautionary markings on the unit, the batteries and all
appropriate sections of this manual.
2. CAUTION --To reduce risk of injury, charge only deep-cycle lead acid type rechargeable batteries.
Other types of batteries may burst, causing personal injury and damage.
3. Do not disassemble the unit. Take it to a qualified service center when service or repair is required.
Incorrect re-assembly may result in a risk of electric shock or fire.
4. To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning.
Turning off the unit will not reduce this risk.
5. CAUTION – Only qualified personnel can install this device with battery.
6. NEVER charge a frozen battery.
7. For optimum operation of this inverter/charger, please follow required spec to select appropriate cable
size. It’s very important to correctly operate this inverter/charger.
8. Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop
a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please
refer to INSTALLATION section of this manual for the details.
10. Fuses are provided as over-current and reversed connection protection for the battery supply.
11. GROUNDING INSTRUCTIONS -This inverter/charger should be connected to a permanent grounded
wiring system. Be sure to comply with local requirements and regulation to install this inverter.
12. NEVER cause AC output and DC input short circuited. Do NOT connect to the mains when DC input
short circuits.
13. Warning!! Only qualified service persons are able to service this device. If errors still persist after
following troubleshooting table, please send this inverter/charger back to local dealer or service center
for maintenance.
2
INTRODUCTION
This is a multi-functional inverter/charger, combining functions of inverter and battery charger to offer
uninterruptible power for office and home appliances. Its comprehensive LCD display offers user-configurable
parameters, such as battery charging current, and acceptable inputs voltage by setting easy-accessible buttons
to fit different application.
Features
Pure sine wave inverter
Configurable battery charging current based on applications via LCD setting
Compatible with mains voltage or generator power
Auto restart while AC is recovering
Overload/ Over temperature/ short circuit protection
Smart battery charger designed for optimized battery performance
Cold start function
Basic System Architecture
The following illustration shows basic application for this inverter/charger and this system should include
generator or utility to form a complete running system. Consult with your system integrator for other possible
system architectures depending on your requirements.
This inverter can power all kinds of appliances at home or in office, including motor-type appliances such as
tube light, fan, refrigerator and air conditioner.
System Diagram
3
Product Overview
1. Operation panel
2. RS-232 communication port
3. AC input terminal
4. AC output terminal
5. Battery input
6. Circuit breaker
7. Parallel communication ports
8. Share current ports
9. Dry contact
10. Communication ports
4
INSTALLATION
Unpacking and Inspection
Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should
have received the following items inside the package:
The unit x 1
User manual x 1
Parallel cable x 2
Software CD x 1
Installation
Consider the following points before selecting where to install:
Do not mount the inverter on flammable construction materials.
Mount on a solid surface
Install this inverter at eye level in order to allow the LCD display to be read at all times.
The ambient temperature should be between 0°C and 40°C to ensure optimal operation.
Rack Mounting
Please follow the diagram below to install the Inverter module in a 19-inch bay (with a depth of 600mm) at the
desired height in the upright cabinet. Secure the device adequately and fix it to the cabinet with six screws.
5
Battery Connection
CAUTION: For safety operation and regulation compliance, it’s requested to install a separate DC over-current
protector or disconnect device between battery and inverter. It may not be requested to have a disconnect
device in some applications, however, it’s still requested to have over-current protection installed. Please refer
to the table below to select proper amperage, required fuse or breaker size.
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use
appropriate cable for battery connection. To reduce risk of injury, please use the
proper cable and terminal size as recommended below.
Recommended battery cable and terminal size:
Model
Typical
Amperage
Battery
capacity
Wire Size
Ring Terminal
Torque
value
Cable
mm2
Dimensions
D (mm)
L (mm)
5KW
125A
200AH
1*4AWG
22
6.4
33.2
2.5~3 Nm
2*8AWG
14
6.4
29.2
Please follow the steps below to implement battery connection:
1. Assemble battery ring terminal based on recommended battery cable and terminal size.
2. Connect all battery packs as the diagram below. It’s suggested to connect battery with at least 200Ah
capacity.
3. Insert the ring terminal of battery cable flatly into battery connector of inverter and make sure the bolts are
tightened with torque of 2.5-3 Nm. Make sure polarity at both the battery and the inverter/charge is
correctly connected and ring terminals are tightly screwed to the battery terminals.
WARNING: Shock Hazard
Installation must be performed with care due to high battery voltage in series.
Ring terminal:
6
CAUTION!! Do not place anything between the flat part of the inverter terminal and the ring
terminal. Otherwise, overheating may occur.
CAUTION!! Do not apply anti-oxidant substance on the terminals before terminals are
connected tightly.
CAUTION!! Before making the final DC connection or closing DC breaker/disconnector, be sure
positive (+) must be connected to positive (+) and negative (-) must be connected to negative
(-).
AC Input/Output Connection
CAUTION!! Before connecting to AC input power source, please install a separate AC breaker between
inverter and AC input power source. This will ensure the inverter can be securely disconnected during
maintenance and fully protected from over current of AC input. The recommended spec of AC breaker is 50A.
CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-connect input
and output connectors.
WARNING! All wiring must be performed by qualified person.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for AC input
connection. To reduce risk of injury, please use the proper cable size as recommended below.
Suggested cable requirement for AC wires
Model
Gauge
Torque Value
5KW
8~10 AWG
1.4~ 1.6Nm
Please follow the steps below to implement AC input/output connection:
1. Before making AC input/output connection, be sure to disconnect DC protector or breaker on battery
terminal first.
2. Remove insulation sleeve 10mm for six conductors.
3. Insert AC input wires according to polarities indicated on terminal block and tighten the terminal screws. Be
sure to connect PE protective conductor ( ) first.
→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)
WARNING:
Be sure that AC power source is disconnected before attempting to fix the wire of the unit.
7
4. Then, insert AC output wires according to polarities indicated on terminal block and tighten terminal screws.
Be sure to connect PE protective conductor ( ) first.
→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)
5. Make sure the wires are securely connected.
Communication Connection
The inverter is equipped with two sets of RS-485 Modbus communication ports. RS-485-1 is for general
communication with personal computer. It will provide advanced communication and monitoring options.
RS-485-2 is for use with Li-battery. For detailed operation, please check your local dealer or installer.
After communication cable is connected well, insert bundled CD into a computer and follow on-screen
instruction to install the monitoring software. For the detailed software operation, please check user manual of
software in the CD.
Dry Contact Signal
There is one dry contact (3A/250VAC) available on the rear panel. It could be used to deliver signal to connect
external device based on different working mode.
Unit Status
Condition
Dry contact port:
NC & C
NO & C
Power Off
Unit is off and no output is powered.
Close
Open
Power On
Output is powered from Utility.
Close
Open
Output is powered from Battery.
Open
Close
CAUTION: Appliances such as air conditioner are required at least 2~3 minutes to restart because it’s required
to have enough time to balance refrigerant gas inside of circuits. If a power shortage occurs and recovers in a
short time, it will cause damage to your connected appliances. To prevent this kind of damage, please check with
manufacturer of air conditioner to see if it’s equipped with time-delay function before installation. Otherwise, this
inverter/charger will detect overload fault and cut off output to protect your appliance but sometimes it still
causes internal damage to the air conditioner.
8
OPERATION
Power ON/OFF
Once the unit has been properly installed and the batteries are connected well, simply press On/Off switch
to turn on the unit.
Operation and Display Panel
The operation and display panel, shown in below chart, is on the front panel of the inverter. It includes
three indicators, three function keys and a LCD display, indicating the operating status and input/output
power information.
LED Indicators
LED Indicator
Messages
Green
Solid On
Output is powered by utility in Line mode.
Flashing
Output is powered by battery in battery mode.
Green
Solid On
Battery is fully charged.
Flashing
Battery is charging.
Red
Solid On
Fault occurs in the inverter.
Flashing
Warning condition occurs in the inverter.
Function Keys
Function Key
Description
ESC
To exit setting mode
SELECT
To go to next page or next selection
ENTER
To confirm the selection in setting mode or enter setting mode
LED indicators
Function keys
LCD display
9
LCD Display Icons
Icon
Function description
Input Source Information
Indicates input voltage, input frequency and battery voltage, charging power
or setting value.
Output Information
Indicates output voltage, output frequency, setting program NO or fault code.
Indicates percentage of load
Battery Information
Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery
mode and charging status.
Indicates battery voltage is low.
In line mode, it will present battery capacity as below table when unit is charging.
Status
Battery voltage
LCD Display
Constant
Current mode /
Constant
Voltage mode
<2V/cell
4 bars will flash in turns.
2 ~ 2.083V/cell
25% bar will be on and the other three
bars will flash in turns.
2.083 ~ 2.167V/cell
Two bars will be on and the other two bars
will flash in turns.
> 2.167 V/cell
Three bars will be on and the leftmost bar
will flash.
Floating mode. Batteries are fully charged.
4 bars will be on.
In battery mode, it will present battery capacity.
Load Percentage
Battery Voltage
LCD Display
Load >50%
< 1.717V/cell
1.717V/cell ~ 1.8V/cell
1.8 ~ 1.883V/cell
> 1.883 V/cell
10
50%> Load > 20%
< 1.817V/cell
1.817V/cell ~ 1.9V/cell
1.9 ~ 1.983V/cell
> 1.983
Load < 20%
< 1.867V/cell
1.867V/cell ~ 1.95V/cell
1.95 ~ 2.033V/cell
> 2.033
Load Information
Indicates unit is overload.
Indicates the load level by 0-24%, 25-50%, 50-74% and 75-100%.
0%~25%
25%~50%
50%~75%
75%~100%
Mode Operation Information
Indicates the load is supplied by utility power.
Indicates the load is supplied by battery
Indicates alarm or fault happened.
Indicates the utility charger circuit is working.
11
LCD Setting
After pressing and holding ENTER button for 3 seconds, the unit will enter setting mode. Press “SELECT”
button to select setting programs. And then, press “ENTER” button to confirm the selection or ESC button to
exit.
Setting Programs:
Program
Description
Selectable option
00
Exit setting mode
Escape
02
Output voltage
220V (default)
230V
240V
03
Output frequency
50Hz (default)
60Hz
04
Maximum utility charging
current
2A 10A (default)
20A
30A
40A 50A
60A
05
Bulk charging voltage
(C.V voltage)
Default setting: 56.4V
This program can be set up. Setting range is from 48.0V to
58.4V for 48V model. Each click increment 0.1V.
06
Floating charging voltage
Default setting: 54V
This program can be set up. Setting range is from 48.0V to
58.4V for 48V model. Each click increment 0.1V.
07
Low DC cut-off voltage
Default setting: 42V
This program can be set up. Setting range is from 40.0V to
48.0V for 48V model. Each click increment 0.1V. Low DC
cut-off voltage will be fixed to setting value no matter what
percentage of load is connected.
09
Power saving mode
enable/disable
Saving mode disable
(default)
If disabled, no matter connected load
is low or high, the output (on/off
status) of inverter will not be affected.
Saving mode enable
If enabled, the output of inverter will
be off when connected load is pretty
low or not detected.
12
10
Auto restart when overload
occurs
Restart disable
(default)
Restart enable
11
Auto restart when
temperature is too high
Restart disable
(default)
Restart enable
12
Alarm control
Alarm on (default)
Alarm off
13
Auto return to default
display screen
Return to default
display screen
(default)
If selected, no matter how users
switch display screen, it will
automatically return to default display
screen (Input voltage /output
voltage) after no button is pressed for
1 minute.
Stay at latest screen
If selected, the display screen will
stay at the latest screen user finally
switches.
14
Backlight control
Backlight on (default)
Backlight off
15
Beeps while primary source
is interrupted
Alarm on (default)
Alarm off
16
Record Fault code
Record enable
Record disable (default)
13
Display Setting
To switch display of the LCD information in turn, press “SELECT” key. The selectable information is switched to
display in order as below: input voltage/output voltage, input frequency, Utility charging power, battery
voltage/output frequency and main CPU Version.
Selectable information
LCD display
Input voltage/Output voltage
(Default Display Screen)
Input Voltage=220V, output voltage=220V
Input frequency
Input frequency=50Hz
Utility charging power
Utility charging power =1000W
Battery voltage/ Output frequency
Battery voltage =52.0V,
output frequency = 50.0Hz
Main CPU version checking
Main CPU version 1.00
14
Description of Operating Mode
Operation mode
Description
LCD display
Standby mode / Power saving mode
Note:
*Standby mode: The inverter is not
turned on yet but at this time, the
inverter can charge battery without AC
output.
*Power saving mode: If enabled, the
output of inverter will be off when
connected load is pretty low or not
detected.
No output is supplied by the unit
but it still can charge batteries.
Charging by utility.
No charging.
Fault mode
Note:
*Fault mode: Errors are caused by errors
inside circuit or external reasons such as
high temperature, output short-circuit
and so on.
No output and No charging
No charging.
Line Mode
The unit will provide output
power from the mains. It will
also charge the battery at line
mode.
Charging by utility.
Battery Mode
The unit will provide output
power from battery
Power from battery only.
15
Fault Reference Code
Fault Code
Fault Event
Icon on
01
Fan is locked when inverter is off.
02
Over temperature
03
Battery voltage is too high
05
Output short circuited or over temperature is detected by internal
converter components.
06
Output voltage is too high.
07
Overload time out
08
Bus voltage is too high
09
Bus soft start failed
51
Over current or surge
52
Bus voltage is too low
53
Inverter soft start failed
55
Over DC voltage in AC output
56
Battery connection is open
57
Current sensor failed
58
Output voltage is too low
Warning Indicator
Warning Event
Audible Alarm
Icon flashing
Fan is locked when
inverter is on.
Beep three times every
second
Battery is over-charged
Beep once every second
Low battery
Beep once every second
Overload
Beep once every 0.5 second
16
SPECIFICATIONS
Table 1 Line Mode Specifications
INVERTER MODEL
5KW
Input Voltage Waveform
Sinusoidal (utility or generator)
Nominal Input Voltage
220Vac
Low Loss Voltage
170Vac± 3V
Low Loss Return Voltage
180Vac± 3V
High Loss Voltage
255Vac± 3V
High Loss Return Voltage
245Vac± 3V
Max AC Input Voltage
300Vac
Nominal Input Frequency
50Hz / 60Hz (Auto detection)
Low Loss Frequency
47.5± 1Hz
Low Loss Return Frequency
48± 1Hz
High Loss Frequency
52.5± 1Hz
High Loss Return Frequency
52± 1Hz
Output Short Circuit Protection
Line mode: Circuit Breaker; Battery mode: Electronic Circuits
Efficiency (Line Mode)
>97% ( Rated R load, battery full charged )
Transfer Time *
10ms typical
*Transfer time may be longer than specified figure when the unit is operating in parallel system.
Table 2 Inverter Mode Specifications
INVERTER MODEL
5KW
Rated Output Power
5KVA/5KW
Output Voltage Waveform
Pure Sine Wave
Output Voltage Regulation
220Vac± 5%
Output Frequency
60Hz or 50Hz
Peak Efficiency
90%
Overload Protection
5s@≥150% load; 10s@110%~150% load
Surge Capacity
2* rated power for 5 seconds
Nominal DC Input Voltage
48Vdc
Cold Start Voltage
46.0Vdc
Low DC Warning Voltage
@ load < 20%
44.0Vdc
@ 20% ≤ load < 50%
42.8Vdc
@ load ≥ 50%
40.4Vdc
Low DC Warning Return Voltage
@ load < 20%
46.0Vdc
@ 20% ≤ load < 50%
44.8Vdc
@ load ≥ 50%
42.4Vdc
Low DC Cut-off Voltage
@ load < 20%
42.0Vdc
@ 20% ≤ load < 50%
40.8Vdc
@ load ≥ 50%
38.4Vdc
High DC Recovery Voltage
58Vdc
High DC Cut-off Voltage
60Vdc
No Load Power Consumption
<50W
Saving Mode Power Consumption
<15W
17
Table 3 Charge Mode Specifications
Utility Charging Mode
INVERTER MODEL
5KW
Charging Current (UPS)
@ Nominal Input Voltage
Default: 30A, Max.: 60A
Bulk Charging Voltage
56.4Vdc
Floating Charging Voltage
54Vdc
Charging Algorithm
3-Step
Charging Curve
Time
Battery Voltage, per cell
Charging Current, %
100%
50%
Bulk
(Constant Current)
Absorption
(Constant Voltage)
Maintenance
(Floating)
Current
Voltage
T
1
T1 = 10* T0, minimum 10mins, maximum 8hrs
T
0
2.43Vdc (2.35Vdc)
2.25Vdc
Table 4 General Specifications
INVERTER MODEL
5KW
Safety Certification
CE
Operating Temperature Range
0°C to 40°C
Storage temperature
-15°C~ 60°C
Dimension (D*W*H), mm
400 x 438 x 86.3
Net Weight, kg
9.1
18
TROUBLE SHOOTING
Problem
LCD/LED/Buzzer
Explanation / Possible
cause
What to do
Unit shuts down
automatically
during startup
process.
LCD/LEDs and buzzer will
be active for 3 seconds
and then complete off.
The battery voltage is too low
(<1.91V/Cell)
1. Re-charge battery.
2. Replace battery.
No response after
power on.
No indication.
1. The battery voltage is far
too low. (<1.4V/Cell)
2. Battery polarity is
connected reversed.
1. Check if batteries and the
wiring are connected well.
2. Re-charge battery.
3. Replace battery.
Mains exist but the
unit works in
battery mode.
Input voltage is displayed
as 0 on the LCD and green
LED is flashing.
Input protector is at fault.
Check if AC breaker is at fault
and AC wiring is connected
well.
Green LED is flashing.
Insufficient quality of AC
power. (Shore or Generator)
Check if AC wires are too thin
and/or too long.
When the unit is
turned on, internal
relay is switched on
and off repeatedly.
LCD display and LEDs are
flashing
Battery is disconnected.
Check if battery wires are
connected well.
Buzzer beeps
continuously and
red LED is on.
Fault code 07
Overload error. The inverter
is overload 110% and time is
up.
Reduce the connected load by
switching off some
equipment.
Fault code 05
Output short circuited.
Check if wiring is connected
well and remove abnormal
load.
Temperature of the
components inside converter
is over 120°C.
Check whether the air flow of
the unit is blocked or whether
the ambient temperature is
too high.
Fault code 02
Temperature of component
inside inverter is over 100°C.
Fault code 03
Battery is over-charged.
Return to repair center.
The battery voltage is too
high.
Check if spec and quantity of
batteries meet the
requirements.
Fault code 01
Fan fault
Replace the fan.
Fault code 06/58
Abnormal output (Inverter
voltage is lower than 190Vac
or is higher than 260Vac)
1. Reduce the connected
load.
2. Return it to repair center
Fault code 08/09/53/57
Internal components failed.
Return it to repair center.
Fault code 51
Over current or surge.
Restart the unit. If the error
happens again, please return
it to repair center.
Fault code 52
Bus voltage is too low.
Fault code 55
Output voltage is unbalanced.
Fault code 56
Battery is not connected well
or fuse burnt out.
If the battery is connected
well, please return it to repair
center.
19
Appendix I: Parallel function
1. Introduction
This inverter can be used in parallel with two different operation modes.
1. Parallel operation in single phase with up to 6 units. The maximum supported output power is 30KW.
2. Six units work together at its maximum to support three-phase equipment. Four units support one phase at
its maximum. The maximum supported output power is 30KW and one phase can be up to 20KW.
NOTE: If this unit is bundled with shared current cable and parallel cable, this inverter is supported parallel
operation at default. You may skip section 2. If not, please purchase parallel kit and install this unit according to
the following instructions by professional technical personnel from local dealer.
2. Package Contents
In parallel kit, you will find the following items in the package:
Parallel communication cable Current sharing cable
3. Wiring Connection
The cable size of each inverter is shown as below:
Recommended battery cable and terminal size for each inverter:
Model
Wire Size
Ring Terminal
Torque
value
Cable
mm2
Dimensions
D (mm)
L (mm)
5KW
1*4AWG
22
6.4
33.2
2~ 3 Nm
2*8AWG
14
6.4
29.2
WARNING: Be sure the length of all battery cables is the same. Otherwise, there will be difference in voltage
between inverter and battery which may cause parallel inverters not to work
Recommended cable size for AC input and output each inverter:
Model
AWG no.
Torque
5KW
8 AWG
1.4~1.6Nm
You need to connect the cables of each inverter. Take the battery cables for example: You need to use a
connector or bus-bar as a joint to connect the battery cables, and then connect it to the battery terminal. The
cable size used from joint to battery should be X times to the cable size in the tables above. “X” indicates the
number of inverters connected in parallel.
Regarding AC input and output, please also follow the same principle.
CAUTION!! Please install the breaker at the side of battery and AC input. This will ensure the inverter securely
is disconnected during maintenance and fully protected from over current of battery or AC input. The
recommended mounted location of the breakers is shown in the chart in sections 4-1 and 4-2.
Ring terminal:
20
Recommended specification of battery breaker for each inverter:
Model
One unit*
5KW
100A/60VDC
*If you want to use only one breaker at the side of battery for the whole system, the rating of the breaker
should be X times to the current of 1 unit. “X” indicates the number of inverters connected in parallel.
Recommended specification of AC input breaker for single-phase application:
Inverter #
Model
2 units
3 units
4 units
5 units
6 units
5KW
100A/230VAC
150A/230VAC
200A/230VAC
250A/230VAC
300A/230VAC
Note 1: It’s accepted to use 50A breaker for each unit in parallel system and a breaker should be installed for
each inverter in the AC input.
Note 2: In three-phase parallel system, you can use one 4-pole breaker. The accepted rating of breaker is
based on the current for each phase with the maximum units. Otherwise, please follow the instruction in Note 1
mentioned above.
Recommended battery capacity
Inverter parallel numbers
2 3 4 5 6
Battery Capacity
400AH
600AH
800AH
1000AH
1200AH
Recommended total charging
current
80A
120A
160A
200A
240A
WARNING! Be sure that all inverters share the same battery bank. Otherwise, the inverters will turn to fault
mode.
4-1. Parallel Operation in Single phase
Two inverters in parallel:
Power Connection
21
Communication Connection
Three inverters in parallel:
Power Connection
Communication Connection
Four inverters in parallel:
Power Connection
22
Communication Connection
Five inverters in parallel:
Power Connection
Communication Connection
Six inverters in parallel:
Power Connection
Communication Connection
23
4-2. Support 3-phase equipment
Two inverters in each phase:
Power Connection
Communication Connection
Four inverters in one phase and one inverter for the other two phases:
Power Connection
Note: It’s up to customer’s demand to pick 4 inverters in any phase.
P1: L1-phase, P2: L2-phase, P3: L3-phase.
Communication Connection
24
Three inverters in one phase, two inverters in second phase and one inverter for the third phase:
Power Connection
Communication Connection
Three inverters in one phase and only one inverter for the remaining two phases:
Power Connection
Communication Connection
25
Two inverters in two phases and only one inverter for the remaining phase:
Power Connection
Communication Connection
Two inverters in one phase and only one inverter for the remaining phases:
Power Connection
26
Communication Connection
One inverter in each phase:
Power Connection
Communication Connection
WARNING: Do not connect the sharing cable between the inverters in different phases. Otherwise, it may
damage the inverters.
27
5. LCD Setting and Display
Setting Program:
Program
Description
Selectable option
01
AC output mode
*This setting is only
available when the
inverter is in standby
mode (Switch off).
Single:
When the units are used in parallel with
single phase, please select “PAL” in
program 01.
It is required to have at least 3 inverters
or maximum 6 inverters to support
three-phase equipment. It’s required to
have at least one inverter in each phase
or it’s up to four inverters in one phase.
Please refers to 4-2 for detailed
information.
Please select “3P1” in program 01 for the
inverters connected to L1 phase, “3P2”
in program 01 for the inverters
connected to L2 phase and “3P3” in
program 01 for the inverters connected
to L3 phase.
Be sure to connect current sharing cable
to units which are on the same phase.
Do NOT connect current sharing cable
between units in different phases.
Besides, power saving function will be
automatically disabled.
Parallel:
L1 phase:
L2 phase:
L3 phase:
Fault code display:
Fault Code
Fault Event
Icon on
60
Power feedback protection
71
Firmware version inconsistent
72
Current sharing fault
80
CAN fault
81
Host loss
82
Synchronization loss
83
Battery voltage detected different
84
AC input voltage and frequency detected different
85
AC output current unbalance
86
AC output mode setting is different
6. Commissioning
Parallel in single phase
Step 1: Check the following requirements before commissioning:
Correct wire connection
Ensure all breakers in Line wires of load side are open and each Neutral wires of each unit are connected
together.
Step 2: Turn on each unit and set “PAL” in LCD setting program 01 of each unit. And then shut down all units.
NOET: It’s necessary to turn off switch when setting LCD program. Otherwise, the setting cannot be
programmed.
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Step 3: Turn on each unit.
LCD display in Master unit
LCD display in Slave unit
NOTE: Master and slave units are randomly defined.
Step 4: Switch on all AC breakers of Line wires in AC input. It’s better to have all inverters connect to utility at
the same time, so they will work normally.
LCD display in Master unit
LCD display in Slave unit
Step 5: If there is no more fault alarm, the parallel system is completely installed.
Step 6: Please switch on all breakers of Line wires in load side. This system will start to provide power to the
load.
Support three-phase equipment
Step 1: Check the following requirements before commissioning:
Correct wire connection
Ensure all breakers in Line wires at load side are open and each neutral wires of each unit are connected.
Step 2: Turn on all units and configure LCD program 01 as P1, P2 and P3 sequentially. And then shut down all
units.
NOET: It’s necessary to turn off switch when setting LCD program. Otherwise, the setting cannot be
programmed.
Step 3: Turn on all units sequentially.
LCD display in L1-phase unit
LCD display in L2-phase unit
LCD display in L3-phase unit
Step 4: Switch on all AC breakers of Line wires in AC input. If AC connection is detected and three phases
matched with the setting in the unit, they will work normally. If the sequences do not match, it won’t
work in Line mode. You must exchange the wires of P2 & P3 or exchange the setting of P2 & P3.
LCD display in L1-phase unit
LCD display in L2-phase unit
LCD display in L3-phase unit
Step 5: If there is no more fault alarm, the system to support 3-phase equipment is completely installed.
Step 6: Please switch on all breakers of Line wires at load side. This system will start to provide power to the
load.
Note 1: To avoid overload occurring, before turning on breakers in load side, it’s better to have whole system
in operation first.
Note 2: Transfer time for this operation exists. Power interruption may happen to critical devices which cannot
bear transfer time.
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7. Trouble shooting
Situation
Solution
Fault
Code
Fault Event Description
60
Current feedback into the
inverter is detected.
1. Restart the inverter.
2. Check if L/N cables are not connected reversely in all inverters.
3. For parallel system in single phase, make sure the sharing current
cables are connected in all inverters.
For supporting three-phase system, make sure the sharing current
cables connected the inverters in the same phase, and disconnected
the inverters in different phases.
4. If the problem remains, please contact your installer.
71
The firmware version of
each inverter is not the
same.
1. Update the firmware of all inverter to the same version.
2. Check the version of each inverter via LCD setting and make sure
the CPU versions are the same. If not, please contact your instraller
to update the firmware.
3. If the problem still remains after the firmwzre is updated, please
contact your installer.
72
The output current of each
inverter is different.
1. Check if shared cables are well connected and restart the inverter.
2. If the problem remains, please contact your installer.
80
CAN data loss
1. Check if communication cables are connected well and restart the
inverter.
2. If the problem remains, please contact your installer.
81
Host data loss
82
Synchronization data loss
83
The battery voltage of each
inverter is not the same.
1. Make sure all inverters share the same groups of batteries.
2. Remove all loads and disconnect AC input and PV input. Then, check
battery voltage of all inverters. If the values from all inverters are
different, please check if all battery cables are in the same length
and same type of material. Otherwise, please contact your installer
for an SOP to calibrate the battery voltage of each inverter.
3. If the problem still remains, please contact your installer.
84
AC input voltage and
frequency are detected
different.
1. Check the utility wiring conncetion and restart the inverter.
2. Make sure utility starts at same time. If there are breakers installed
between utility and inverters, please be sure all breakers can be
turned on AC input at same time.
3. If the problem remains, please contact your installer.
85
AC output current
unbalance
1. Restart the inverter.
2. Remove some excessive loads and re-check load information from
LCD of inverters.
3. If the problem remains, please contact your installer.
86
AC output mode setting is
different.
1. Switch off the inverter and check LCD setting #01.
2. For parallel system in single phase, make sure no 3P1, 3P2 or 3P3 is
set on #01.
For supporting three-phase system, make sure no “PAL” is set on
#01.
3. If the problem remains, please contact your installer.
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Appendix II: Approximate Back-up Time Table
Model
Load (W)
Backup Time @ 48Vdc 100Ah (min)
Backup Time @ 48Vdc 200Ah (min)
5KW
400
613
1288
800
268
613
1200
158
402
1600
111
271
2000
90
215
2400
76
182
2800
65
141
3200
50
112
3600
44
100
4000
40
90
5000
30
70
Note: Backup time depends on the quality of the battery, age of battery and type of battery.
Specifications of batteries may vary depending on different manufacturers.
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