Voltronic Power EPS 5KW User manual

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
T1
T1 = 10* T0, minimum 10mins, maximum 8hrs
T0
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.