Voltronic Power 3KVA User manual

3KVA-5KVA (PF 1)
INVERTER / CHARGER
Version: 1.5
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
Preparation ......................................................................................................................................................4
Mounting the Unit.............................................................................................................................................4
Battery Connection ..........................................................................................................................................5
AC Input/Output Connection............................................................................................................................7
PV Connection.................................................................................................................................................8
Final Assembly.................................................................................................................................................9
Communication Connection.............................................................................................................................9
OPERATION......................................................................................................................................................10
Power ON/OFF ..............................................................................................................................................10
Operation and Display Panel.........................................................................................................................10
LCD Display Icons .........................................................................................................................................11
LCD Setting....................................................................................................................................................13
Display Setting...............................................................................................................................................17
Operating Mode Description..........................................................................................................................21
Battery Equalization Description....................................................................................................................23
Fault Reference Code....................................................................................................................................25
Warning Indicator...........................................................................................................................................25
CLEARANCE AND MAINTENANCE FOR ANTI-DUST KIT............................................................................26
Overview........................................................................................................................................................26
Clearance and Maintenance..........................................................................................................................26
SPECIFICATIONS.............................................................................................................................................27
Table 1 Line Mode Specifications ...................................................................................................................27
Table 2 Inverter Mode Specifications .............................................................................................................28
Table 3 Charge Mode Specifications ..............................................................................................................29
Table 4 General Specifications .......................................................................................................................29
TROUBLE SHOOTING.....................................................................................................................................30
Appendix: Approximate Back-up Time Table ...............................................................................................31

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. One piece of 150A fuse is provided as over-current 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.
14. WARNING: Because this inverter is non-isolated, only three types of PV modules are acceptable:
single crystalline, poly crystalline with class A-rated and CIGS modules. To avoid any malfunction, do
not connect any PV modules with possible current leakage to the inverter. For example, grounded PV
modules will cause current leakage to the inverter. When using CIGS modules, please be sure NO
grounding.
15. CAUTION: It’s requested to use PV junction box with surge protection. Otherwise, it will cause
damage on inverter when lightning occurs on PV modules.

2
INTRODUCTION
This is a multi-function inverter/charger, combining functions of inverter, solar charger and battery charger to
offer uninterruptible power support with portable size. Its comprehensive LCD display offers user-configurable
and easy-accessible button operation such as battery charging current, AC/solar charger priority, and
acceptable input voltage based on different applications.
Features
Pure sine wave inverter
Inverter running without battery
Configurable input voltage range for home appliances and personal computers via LCD setting
Configurable battery charging current based on applications via LCD setting
Configurable AC/Solar Charger priority via LCD setting
Compatible to mains voltage or generator power
Auto restart while AC is recovering
Overload/ Over temperature/ short circuit protection
Smart battery charger design for optimized battery performance
Cold start function
Basic System Architecture
The following illustration shows basic application for this inverter/charger. It also includes following devices to
have a complete running system:
Generator or Utility.
PV modules
Consult with your system integrator for other possible system architectures depending on your requirements.
This inverter can power all kinds of appliances in home or office environment, including motor-type appliances
such as tube light, fan, refrigerator and air conditioner.
Figure 1 Hybrid Power System

3
Product Overview
1. LCD display
2. Status indicator
3. Charging indicator
4. Fault indicator
5. Function buttons
6. Power on/off switch
7. AC input
8. AC output
9. PV input
10. Battery input
11. Circuit breaker
12. USB communication port
13. RS-232 communication port

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 of package:
The unit x 1
User manual x 1
Communication cable x 1
Software CD x 1
DC Fuse x 1
Ring terminal x 1
Strain relief plate x 1
PV wire cover x 1
Screws x 4
Preparation
Before connecting all wirings, please take off bottom cover by removing two screws as shown below.
Mounting the Unit
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.
For 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.
The ambient temperature should be between 0°C and 55°C to ensure
optimal operation.
The recommended installation position is to be adhered to the wall
vertically.
Be sure to keep other objects and surfaces as shown in the diagram to
guarantee sufficient heat dissipation and to have enough space for
removing wires.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.

5
Install the unit by screwing two screws. It’s recommended to use M4 or M5 screws.
Battery Connection
This model can be operated without battery connection. Connect to battery if necessary.
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 typical amperage in below table as 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 recommended cable as below.
Recommended battery cable size:
Model
Wire Size
Cable (mm2)
Torque value（max）
3KVA/5KVA
1 x 2AWG
35
2 Nm
Please follow below steps to implement battery connection:
1. Remove insulation sleeve 18 mm for positive and negative conductors.
2. Suggest to put bootlace ferrules on the end of positive and negative wires
with a proper crimping tool.
3. Fix strain relief plate to the inverter by supplied screws as shown in below
chart.
4. Connect all battery packs as below chart.

6
5. Insert the battery wires flatly into battery connectors of inverter and make sure the bolts are tightened with
torque of 2 Nm in clockwise direction. Make sure polarity at both the battery and the inverter/charge is
correctly connected and conductors are tightly screwed into the battery terminals.
Recommended tool: #2 Pozi Screwdriver
6. To firmly secure wire connection, you may fix the wires to strain relief with cable tie.
WARNING: Shock Hazard
Installation must be performed with care due to high battery voltage in series.
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
(-).

7
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 32A
for 3KVA and 50A for 5KVA.
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 a qualified personnel.
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 recommended cable size as below.
Suggested cable requirement for AC wires
Model
Gauge
Cable (mm2)
Torque Value
3KVA
12 AWG
4
1.2 Nm
5KVA
10 AWG
6
1.2 Nm
Please follow below steps to implement AC input/output connection:
1. Before making AC input/output connection, be sure to open DC protector or disconnector first.
2. Remove insulation sleeve 10mm for six conductors. And shorten phase L and neutral conductor N 3 mm.
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 hardwire it to the unit.
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.

8
PV Connection
CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between inverter
and PV modules.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV
module connection. To reduce risk of injury, please use the proper recommended cable size as below.
Model
Wire Size
Cable (mm2)
Torque value（max）
3KVA/5KVA
1 x 12AWG
4
1.2 Nm
WARNING: Because this inverter is non-isolated, only three types of PV modules are acceptable: single
crystalline, poly crystalline with class A-rated and CIGS modules.
To avoid any malfunction, do not connect any PV modules with possible current leakage to the inverter. For
example, grounded PV modules will cause current leakage to the inverter. When using CIGS modules, please
be sure NO grounding.
CAUTION: It’s requested to use PV junction box with surge protection. Otherwise, it will cause damage on
inverter when lightning occurs on PV modules.
PV Module Selection:
When selecting proper PV modules, please be sure to consider below parameters:
1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than min. battery voltage.
INVERTER MODEL
3KVA
5KVA
Max. PV Array Open Circuit Voltage
500Vdc
PV Array MPPT Voltage Range
120Vdc~450Vdc
Take 250Wp PV module as an example. After considering above two parameters, the recommended module
configurations are listed as below table.
Solar Panel Spec.
(reference)
- 250Wp
- Vmp: 30.1Vdc
- Imp: 8.3A
- Voc: 37.7Vdc
- Isc: 8.4A
- Cells: 60
SOLAR INPUT
Q'ty of panels
Total input
power
(Min in serial: 6 pcs, max. in serial: 13 pcs)
6 pcs in serial
6 pcs
1500W
8 pcs in serial
8 pcs
2000W
12 pcs in serial
12 pcs
3000W
13 pcs in serial
13 pcs
3250W
8 pieces in serial and 2 sets in parallel
16 pcs
4000W
10 pieces in serial and 2 sets in parallel (only for
5KVA model)
20 pcs
5000W
PV Module Wire Connection
Please follow below steps to implement PV module connection:
1. Remove insulation sleeve 10 mm for positive and negative conductors.
2. Suggest to put bootlace ferrules on the end of positive and negative wires with a
proper crimping tool.
3. Fix PV wire cover to the inverter with supplied screws as shown in below chart.
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
manufacturer of air conditioner if it’s equipped with time-delay function before installation. Otherwise, this
inverter/charger will trig overload fault and cut off output to protect your appliance but sometimes it still causes
internal damage to the air conditioner.

9
4. Check correct polarity of wire connection from PV modules and PV input connectors. Then, connect positive
pole (+) of connection wire to positive pole (+) of PV input connector. Connect negative pole (-) of
connection wire to negative pole (-) of PV input connector. Screw two wires tightly in clockwise direction.
Recommended tool: 4mm blade screwdriver
Final Assembly
After connecting all wirings, please put bottom cover back by screwing two screws as shown below.
Communication Connection
Please use supplied communication cable to connect to inverter and PC. 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 inside of CD.

10
OPERATION
Power ON/OFF
Side view of unit
Once the unit has been properly installed and the batteries are connected well, simply press On/Off switch
(located on the button of the case) 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, four function keys and a LCD display, indicating the operating status and input/output
power information.
LED Indicator
LED Indicator
Messages
Green
Solid On
Output is powered by utility in Line mode.
Flashing
Output is powered by battery or PV 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
UP
To go to previous selection
DOWN
To go to next selection
ENTER
To confirm the selection in setting mode or enter setting mode
LCD display
LED indicators
Function keys

11
LCD Display Icons
Icon
Function description
Input Source Information
Indicates the AC input.
Indicates the PV input
Indicate input voltage, input frequency, PV voltage, charger current (if PV in
charging for 3K models), charger power, battery voltage.
Configuration Program and Fault Information
Indicates the setting programs.
Indicates the warning and fault codes.
Warning: flashing with warning code.
Fault: lighting with fault code
Output Information
Indicate output voltage, output frequency, load percent, load in VA, load in
Watt and discharging current.
Battery Information
Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery
mode and charging status in line mode.
In AC mode, it will present battery charging status.
Status
Battery voltage
LCD Display
Constant
Current mode /
Constant
Voltage mode
<2V/cell
4 bars will flash in turns.
2 ~ 2.083V/cell
Bottom bar will be on and the other three
bars will flash in turns.
2.083 ~ 2.167V/cell
Bottom two bars will be on and the other
two bars will flash in turns.
> 2.167 V/cell
Bottom three bars will be on and the top
bar will flash.
Floating mode. Batteries are fully charged.
4 bars will be on.

12
In battery mode, it will present battery capacity.
Load Percentage
Battery Voltage
LCD Display
Load >50%
< 1.85V/cell
1.85V/cell ~ 1.933V/cell
1.933V/cell ~ 2.017V/cell
> 2.017V/cell
Load < 50%
< 1.892V/cell
1.892V/cell ~ 1.975V/cell
1.975V/cell ~ 2.058V/cell
> 2.058V/cell
Load Information
Indicates overload.
Indicates the load level by 0-24%, 25-49%, 50-74% and 75-100%.
0%~24%
25%~49%
50%~74%
75%~100%
Mode Operation Information
Indicates unit connects to the mains.
Indicates unit connects to the PV panel.
Indicates load is supplied by utility power.
Indicates the utility charger circuit is working.
Indicates the DC/AC inverter circuit is working.
Mute Operation
Indicates unit alarm is disabled.

13
LCD Setting
After pressing and holding ENTER button for 3 seconds, the unit will enter setting mode. Press “UP”or “DOWN”
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
01
Output source priority:
To configure load power
source priority
Utility first (default)
Utility will provide power to the
loads as first priority.
Solar and battery energy will
provide power to the loads only
when utility power is not available.
Solar first
Solar energy provides power to
the loads as first priority.
If solar energy is not sufficient to
power all connected loads, Utility
energy will supply power to the
loads at the same time.
SBU priority
Solar energy provides power to
the loads as first priority.
If solar energy is not sufficient to
power all connected loads, battery
energy will supply power to the
loads at the same time.
Utility provides power to the loads
only when battery voltage drops
to either low-level warning voltage
or the setting point in program 12.
02
Maximum charging current:
To configure total charging
current for solar and utility
chargers.
(Max. charging current =
utility charging current +
solar charging current)
60A (default)
Setting range is from 10A to 100A.
Increment of each click is 10A.
03
AC input voltage range
Appliances (default)
If selected, acceptable AC input
voltage range will be within
90-280VAC.
UPS
If selected, acceptable AC input
voltage range will be within
170-280VAC.
05
Battery type
AGM (default)
Flooded

14
User-Defined
If “User-Defined”is selected,
battery charge voltage and low DC
cut-off voltage can be set up in
program 26, 27 and 29.
06
Auto restart when overload
occurs
Restart disable (default)
Restart enable
07
Auto restart when over
temperature occurs
Restart disable (default)
Restart enable
09
Output frequency
50Hz (default)
60Hz
10
Output voltage
220V
230V (default)
240V
11
Maximum utility charging
current
Note: If setting value in
program 02 is smaller than
that in program in 11, the
inverter will apply charging
current from program 02 for
utility charger.
30A (default)
Setting range is 2A, then from 10A
to 100A. Increment of each click is
10A.
12
Setting voltage point back
to utility source when
selecting “SBU priority”in
program 01.
Available options in 3KVA model:
23.0V (default)
Setting range is from 22V to
25.5V. Increment of each click is
0.5V.
Available options in 5KVA model:
46V (default)
Setting range is from 44V to 51V.
Increment of each click is 1V.
13
Setting voltage point back
to battery mode when
selecting “SBU priority”in
program 01.
Available options in 3KVA model:
Battery fully charged
27V (default)
Setting range is from 24V to 29V. Increment of each click is 0.5V.
Available options in 5KVA model:
Battery fully charged
54V (default)
Setting range is from 48V to 58V. Increment of each click is 1V.

15
16
Charger source priority:
To configure charger
source priority
If this inverter/charger is working in Line, Standby or Fault mode,
charger source can be programmed as below:
Utility first
Utility will charge battery as first
priority.
Solar energy will charge battery
only when utility power is not
available.
Solar first
Solar energy will charge battery as
first priority.
Utility will charge battery only
when solar energy is not available.
Solar and Utility (default)
Solar energy and utility will charge
battery at the same time.
Only Solar
Solar energy will be the only
charger source no matter utility is
available or not.
If this inverter/charger is working in Battery mode, only solar
energy can charge battery. Solar energy will charge battery if it's
available and sufficient.
18
Alarm control
Alarm on (default)
Alarm off
19
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 latest screen user finally
switches.
20
Backlight control
Backlight on (default)
Backlight off
22
Beeps while primary source
is interrupted
Alarm on (default)
Alarm off
23
Overload bypass:
When enabled, the unit will
transfer to line mode if
overload occurs in battery
mode.
Bypass disable (default)
Bypass enable
25
Record Fault code
Record enable (default)
Record disable

16
26
Bulk charging voltage
(C.V voltage)
3KVA default setting: 28.2V
5KVA default setting: 56.4V
If self-defined is selected in program 5, this program can be set
up. Setting range is from 25.0V to 31.5V for 3KVA model and
48.0V to 61.0V for 5KVA model. Increment of each click is 0.1V.
27
Floating charging voltage
3KVA default setting: 27.0V
5KVA default setting: 54.0V
If self-defined is selected in program 5, this program can be set
up. Setting range is from 25.0V to 31.5V for 3KVA model and
48.0V to 61.0V for 5KVA model. Increment of each click is 0.1V.
29
Low DC cut-off voltage:
If battery power is only
power source available,
inverter will shut down.
If PV energy and battery
power are available,
inverter will charge
battery without AC
output.
3KVA default setting: 21.0V
5KVA default setting: 42.0V
If self-defined is selected in program 5, this program can be set
up. Setting range is from 21.0V to 24.0V for 3KVA model and
42.0V to 48.0V for 5KVA model. Increment of each click is 0.1V.
Low DC cut-off voltage will be fixed to setting value no matter
what percentage of load is connected.
30
Battery equalization
Battery equalization
Battery equalization disable (default)
If “Flooded”or “User-Defined”is selected in program 05, this
program can be set up.
31
Battery equalization voltage
3KVA default setting: 29.2V
5KVA default setting: 58.4V

17
Setting range is from 25.0V to 31.5V for 3KVA model and 48.0V to
61.0V for 5KVA model. Increment of each click is 0.1V.
33
Battery equalized time
60min (default)
Setting range is from 5min to 900min.
Increment of each click is 5min.
34
Battery equalized timeout
120min (default)
Setting range is from 5min to 900 min.
Increment of each click is 5 min.
35
Equalization interval
30days (default)
Setting range is from 0 to 90 days.
Increment of each click is 1 day
36
Equalization activated
immediately
Enable
Disable (default)
If equalization function is enabled in program 30, this program can
be set up. If “Enable” is selected in this program, it’s to activate
battery equalization immediately and LCD main page will shows
“”. If “Disable” is selected, it will cancel equalization function
until next activated equalization time arrives based on program 35
setting. At this time, “ ” will not be shown in LCD main page.
Display Setting
The LCD display information will be switched in turns by pressing “UP”or “DOWN”key. The selectable
information is switched as below order: input voltage, input frequency, PV voltage, charging current, charging
power, battery voltage, output voltage, output frequency, load percentage, load in Watt, load in VA, load in
Watt, DC discharging current, main CPU Version.
Selectable information
LCD display
Input voltage/Output voltage
(Default Display Screen)
Input Voltage=230V, output voltage=230V
Input frequency
Input frequency=50Hz
PV voltage
PV voltage=260V

18
PV current
PV current = 2.5A
PV power
PV power = 500W
Charging current
AC and PV charging current=50A
PV charging current=50A
AC charging current=50A