user`s manual - Voltacon Solar
User Manual
LV 3KVA-24V
INVERTER / CHARGER
Version: 1.1
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 ..................................................................................................................6
PV Connection .......................................................................................................................................7
Final Assembly ......................................................................................................................................8
Communication Connection ....................................................................................................................9
Dry Contact Signal .................................................................................................................................9
OPERATION ................................................................................................................................... 10
Power ON/OFF .................................................................................................................................... 10
Operation and Display Panel ................................................................................................................. 10
LCD Display Icons ................................................................................................................................ 11
LCD Setting ......................................................................................................................................... 13
Display Setting .................................................................................................................................... 18
Operating Mode Description ................................................................................................................. 21
Fault Reference Code ........................................................................................................................... 22
Warning Indicator ................................................................................................................................ 23
SPECIFICATIONS .......................................................................................................................... 24
Table 1: Line Mode Specifications ......................................................................................................... 24
Table 2: Inverter Mode Specifications ................................................................................................... 25
Table 3: Charging Mode Specifications .................................................................................................. 26
Table 4 General Specifications .............................................................................................................. 27
TROUBLESHOOTING ..................................................................................................................... 28
Appendix I: Approximate Back-up Time Table ............................................................................. 29
Appendix II: Parallel function ....................................................................................................... 30
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 warnings marked on the unit, the batteries and all
appropriate sections of this manual.
2.
CAUTION --To reduce risk of injury, charge it with only deep-cycle lead acid type rechargeable
batteries. It might cause burst or result in physical injury and damage if you charge it with other types
of the batteries.
3.
Do not disassemble the unit at will. For servicing or repairs, it’s advised to take it to an authorized
service center. Incorrect re-assembly may result in a risk of electric shock or fire.
4.
To reduce the risk of electric shock, unplug all wirings from the wall outlet before 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 the batteries. A potential risk exists when
you drop tools on or around the batteries. Spark, short circuited batteries or other electrical parts might
cause an explosion.
9.
Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please
refer to the INSTALLATION section of this manual for the details.
10. Fuses are provided for over-current protection of 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 staffs are able to operate this device. If errors still persist after
following the troubleshooting table, please send this inverter/charger back to the local dealer or service
center for maintenance.
1
INTRODUCTION
This is a multi-functional inverter/charger, combining the functions of inverter, PWM/MPPT solar charger and
battery charger to offer uninterruptible power support with portability. Its comprehensive LCD display offers
user-configurable and easy-accessible button operation such as battery charging current, priority setting for
AC/solar charger, and acceptable input voltage setting to suit different applications.
Features

Pure sine wave inverter

Built-in PWM/MPPT solar charge controller

Configurable input voltage range for home appliances and personal computers via LCD setting

Configurable battery charging current to suit different applications via LCD setting

Configurable priority of AC/Solar Charger via LCD setting

Compatible to mains voltage or generator power

Automatic restart while AC is recovering

Overload/ Over temperature/ short circuit protection

Smart battery charger design to optimize battery performance

Cold start function
Basic System Architecture
The following illustration shows basic application of this inverter/charger. It also includes the following devices
to complete the whole running system:
 Generator or Utility.
 PV modules
Consult your system integrator for other possible system architectures depending on your requirements.
This inverter can power all kinds of appliances at home or in the office, including motor-type appliances such as
tube light, fan, refrigerator and air conditioner.
Figure 1 Hybrid Power System
2
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. RS232 communication port
13. Parallel communication port (only for parallel model)
14. Current sharing port (only for parallel model)
15. Dry contact
16. USB communication port
3
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
 Communication cable x 1
 Software CD x 1
Preparation
Before connecting all wirings, please take off the cover of the bottom by removing the two screws as shown
below.
Mounting the Unit
Consider the following points before selecting where to install:
 Do not mount the inverter on any flammable construction materials.
 Mount this inverter on a solid surface
 Install this inverter at eye level in order to read the LCD display at all
times.
 The ambient temperature should be between 0°C and 55°C to
ensure optimal operation.
 The inverter should be adhered to the wall vertically.
 Be sure to keep other objects away and leave the space in a
minimum as shown in the right diagram to guarantee sufficient
heat dissipation and enough space for replacing wires.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.
Install the unit by screwing two screws as shown in the diagram.
It’s recommended to use M4 or M5 screws.
4
Battery Connection
CAUTION: For safety operation and regulation compliance, it’s requested to install a separate DC over-current
protector or disconnect the device between battery and inverter. It may not be necessary to disconnect the
device for some applications, however, it’s requested to have over-current protection installed. Please refer to
the typical amperage in the table below as required fuse or size of the breaker.
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 proper cables and suitable size of terminal recommended below.
Recommended battery cables and size of terminal:
Model
Typical Amperage
3KVA 24V
100A
Battery Capacity
100AH/200AH
Wire Size
1*4AWG
Torque Value
2~ 3 Nm
Please follow the steps below to implement the 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.
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
5
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!! Do not place anything between the flat part of the inverter terminal and the ring
terminal. Otherwise, overheating may occur.
CAUTION!! Do not apply any anti-oxidant substance on the terminals before the 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 40A
for 3KVA.
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 the 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 recommended cable size as below.
Suggested cable requirement for AC wires
Gauge
Torque Value
8 AWG
1.4~ 1.6Nm
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 from the six conductors. And short-circuit 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
6
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 fasten the 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.
CAUTION: Important
Be sure to connect AC wires with correct polarity. If L and N wires are connected reversely, it may cause
utility short-circuited when these inverters are worked in parallel operation.
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
the manufacturer of the air conditioner if it’s equipped with time-delay function before installation. Otherwise,
this inverter/charger will cause overload fault and cut off the output to protect your appliance but sometimes it
still causes internal damage to the air conditioner.
PV Connection
CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between inverter
and PV modules.
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 PV
module connection. To reduce risk of injury, please use the recommended cable size as below.
7
Model
Typical Amperage
Cable Size
Torque
Model with PWM
50A
8 AWG
1.4~1.6 Nm
Model with MPPT
80A
6 AWG
1.4~1.6 Nm
PV Module Selection:
When selecting proper PV modules, please be sure to consider the parameters below:
1. Open circuit Voltage (Voc) of PV modules can’t exceed the maximum voltage of the PV array open circuit of
the inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than the minimum voltage of the battery.
Solar Charging Mode
Solar Charger Type
PWM
MPPT
Max. PV Array Open Circuit Voltage
80Vdc
145Vdc
N/A
30~80Vdc
30~40Vdc
N/A
17Vdc
34Vdc
PV Array MPPT Voltage Range
Operating Voltage Range
Min. battery voltage for PV charge
Please follow the steps below to implement PV module connection:
1. Remove insulation sleeve 10 mm from positive and negative conductors.
2. Check the correct polarity of connected cable from PV modules and PV input
connectors. Then, connect positive pole (+) of connection cable to positive
pole (+) of PV input connector. Connect negative pole (-) of connection
cable to negative pole (-) of PV input connector.
3. Make sure the wires are securely connected.
Final Assembly
After connecting all wirings, please put the bottom cover back by fixing two screws as shown below.
8
Communication Connection
Please use supplied communication cable to connect to inverter and PC. Insert bundled CD into a computer and
follow the on-screen instructions to install the monitoring software. For the detailed software operations,
please check user manual of software inside the CD.
Dry Contact Signal
There is one dry contact (3A/120VAC) available on the rear panel. It could be used to deliver signal to external
device when battery voltage reaches warning level.
Unit
Condition
Status
Power Off
NC & C
NO & C
Unit is off and no output is powered.
Close
Open
Output is powered from Utility.
Close
Open
Open
Close
Close
Open
Open
Close
Close
Open
Output
is
Program
Battery voltage < Low DC warning
powered
01 set as
voltage
from Battery
Utility
Battery voltage > Setting value in
or Solar.
Power On
Dry contact port:
Program 13 or battery charging
reaches floating stage
Program
Battery voltage < Setting value in
01 is set
Program 12
as SBU or
Battery voltage > Setting value in
Solar first
Program 13 or the battery
charging reaches the floating
stage
9
OPERATION
Power ON/OFF
Once the unit has been properly installed and the batteries are connected well, simply press On/Off switch
(located on the right corner of the rear panel) to turn on the unit.
Operation and Display Panel
The operation and display panel, as shown in the chart below, are on the front panel of the inverter. It
includes three indicators, four function keys and an LCD display, indicating the operating status and
input/output power information.
LCD display
LED indicators
Function keys
LED Indicator
LED Indicator
Green
Green
Red
Messages
Solid On
Output is powered by utility in Line mode.
Flashing
Output is powered by battery or PV in battery mode.
Solid On
Battery is fully charged.
Flashing
Battery is charging.
Solid On
Fault occurs in the inverter.
Flashing
Warning 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
10
LCD Display Icons
Icon
Function description
Input Source Information
Indicates the AC input.
Indicates the PV input
Indicates input voltage, input frequency, PV voltage, battery voltage and
charger current.
Configuration Program and Fault Information
Indicates the setting programs.
Indicates the warning and fault codes.
Warning:
Fault:
flashing with warning code.
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
<2V/cell
Constant
2 ~ 2.083V/cell
Current mode /
Constant
Voltage mode
LCD Display
4 bars will flash in turns.
Bottom bar will be on and the other three
bars will flash in turns.
Bottom two bars will be on and the other
two bars will flash in turns.
Bottom three bars will be on and the top
2.083 ~ 2.167V/cell
> 2.167 V/cell
bar will flash.
In floating mode, batteries are fully charged.
4 bars will be on.
11
In battery mode, it will present battery capacity.
Load Percentage
Battery Voltage
LCD Display
< 1.717V/cell
1.717V/cell ~ 1.8V/cell
Load >50%
1.8 ~ 1.883V/cell
> 1.883 V/cell
< 1.817V/cell
1.817V/cell ~ 1.9V/cell
50%> Load > 20%
1.9 ~ 1.983V/cell
> 1.983
< 1.867V/cell
1.867V/cell ~ 1.95V/cell
Load < 20%
1.95 ~ 2.033V/cell
> 2.033
Load Information
Indicates overload.
Indicates the load level by 0-24%, 25-50%, 50-74% and 75-100%.
0%~25%
25%~50%
50%~75%
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 the alarm is disabled.
12
75%~100%
LCD Setting
After pressing and holding the 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
Escape
00
Exit setting mode
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
Solar first
at the same time.
Utility provides power to the loads
only when any one condition stated
below happens:
- Solar energy is not available
- Battery voltage drops to either low
DC warning voltage or the setting
point in program 12.
Output source priority:
01
To configure load power
source priority
Utility will provide power to the loads
Utility first (default)
as first priority.
Solar and battery energy will provide
power to the loads only when utility
power is not available.
Solar energy provides power to the
loads as first priority.
If solar energy is not sufficient to
SBU priority
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 DC warning voltage or the
setting point in program 12.
02
Maximum charging current:
To configure the total
charging current for solar
and utility chargers.
(Max. charging current =
utility charging current +
solar charging current)
10A
20A
13
02
Maximum charging current:
To configure the total
charging current for solar
and utility chargers.
(Max. charging current =
utility charging current +
solar charging current)
30A
40A
50A
60A (default)
70A
80A
90A
100A
120A (only for 3KVA with MPPT
110A
130A
models)
(only for 3KVA
140A
(only for 3KVA with MPPT
with MPPT models)
models)
Appliances (default)
If selected, acceptable AC input
voltage range will be within
03
AC input voltage range
90-280VAC.
UPS
If selected, acceptable AC input
voltage range will be within
170-280VAC.
04
Power saving mode
enable/disable
Saving mode disable
If disabled, no matter connected load
(default)
is low or high, the on/off status of
inverter output will not be effected.
Saving mode enable
If enabled, the output of inverter will
be off when connected load is pretty
low or not detected.
05
Battery type
AGM (default)
Flooded
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.
Restart disable
06
Automatically restart when
overload occurs
(default)
14
Restart enable
Restart disable
07
08
09
11
Automatically restart when
over temperature occurs
Restart enable
(default)
110V
120V (default)
50Hz (default)
60Hz
2A
10A
20A
30A (default)
40A
50A
Output voltage
Output frequency
Maximum utility charging
current
60A
12
13
Setting voltage point back
to utility source when
selecting “SBU priority” or
“Solar first” in program 01.
Setting voltage point back
to battery mode when
selecting “SBU priority” or
“Solar first” in program 01.
22.0V
22.5V
23.0V (default)
23.5V
24.0V
24.5V
25.0V
25.5V
Battery fully charged
24V
24.5V
25V
15
25.5V
26V
26.5V
27V (default)
27.5V
28V
28.5V
29V
If this inverter/charger is working in Line, Standby or Fault
mode, charger source can be programmed as below:
Solar first
Solar energy will charge battery as
first priority.
Utility will charge battery only when
solar energy is not available.
Utility first
Utility will charge battery as first
priority.
16
Charger source priority:
Solar energy will charge battery only
To configure the priority of
when utility power is not available.
charger source
Solar and Utility
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 or Power
saving mode, only solar energy can charge battery. Solar
energy will charge battery if it's available and sufficient.
18
Alarm on (default)
Alarm off
Return to default
If selected, no matter how users
display screen
switch display screen, it will
(default)
automatically return to default display
Alarm control
screen (Input voltage /output
19
Automatically return to
default display screen
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.
16
20
Backlight control
22
Beeps while primary source
is interrupted
23
Overload bypass:
When enabled, the unit will
transfer to line mode if
overload occurs in battery
mode.
Backlight on (default)
Backlight off
Alarm on (default)
Alarm off
Bypass disable
Bypass enable
(default)
Record enable
25
Record disable (default)
Record Fault code
default setting: 28.2V
26
Bulk charging voltage
(C.V voltage)
If self-defined is selected in program 5, this program can be
set up. Setting range is from 24.0V to 29.2V. Increment of
each click is 0.1V.
default setting: 27.0V
27
Floating charging voltage
If self-defined is selected in program 5, this program can be
set up. Setting range is from 24.0V to 29.2V. Increment of
each click is 0.1V.
default setting: 21.0V
29
Low DC cut-off voltage
If self-defined is selected in program 5, this program can be
set up. Setting range is from 20.0V to 24.0V. Increment of
each click is 0.1V. Low DC cut-off voltage will be fixed to
31
Solar power balance:
When enabled, solar input
power will be automatically
adjusted according to the
connected load power.
setting value no matter what percentage of load is connected.
If selected, solar input power will
Solar power balance
be automatically adjusted
enable (Default):
according to the following formula:
Max. input solar power = Max.
battery charging power +
Connected load power.
If selected, the solar input power
Solar power balance
will be the same as max. battery
disable:
charging power no matter how
many loads are connected. The
max. battery charging power will
be based on the setting current in
program 02.
(Max. solar power = Max. battery
charging power)
17
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, MPPT charging current,
MPPT charging power, battery voltage, output voltage, output frequency, load percentage, load in VA,
load in Watt, DC discharging current, main CPU Version and second CPU Version.
Selectable information
LCD display
Input Voltage=120V, output voltage=120V
Input voltage/Output voltage
(Default Display Screen)
Input frequency=50Hz
Input frequency
PV voltage=60V
PV voltage
Current ≧10A
MPPT Charging current
MPPT Charging power
Current < 10A
MPPT charging power=500W
18
Battery voltage=25.5V, discharging current=1A
Battery voltage/ DC discharging current
Output frequency=50Hz
Output frequency
Load percent=70%
Load percentage
When connected load is lower than 1kVA, load in
VA will present xxxVA like the chart below.
Load in VA
When load is larger than 1kVA (≧1KVA), load in
VA will present x.xkVA like the chart below.
19
When load is lower than 1kW, load in W will
present xxxW like the chart below.
Load in Watt
When load is larger than 1kW (≧1KW), load in W
will present x.xkW like the chart below.
Main CPU version: 00014.04
Main CPU version checking
Secondary CPU version: 00003.03
Secondary CPU version checking
20
Operating Mode Description
Operation mode
Description
LCD display
Charging by utility.
Standby mode / Power
saving mode
Note:
*Standby mode: The inverter is
not turned on yet but at this
No output is supplied by the
time, the inverter can charge
unit but it still can charge the
battery without AC output.
batteries.
Charging by PV energy.
*Power saving mode: If
enabled, the output of inverter
No charging.
will be off when connected load
is pretty low or not detected.
Charging by PV energy.
Fault mode
Note:
*Fault mode: Errors are caused
by internal circuit errors or
external reasons such as over
PV energy can charge the
batteries.
No charging.
temperature, output short
circuited and so on.
Charging by PV energy
The unit will provide output
Line Mode
power from the mains. It will
also charge the battery in line
Charging by utility.
mode.
Power from battery and PV energy.
The unit will provide output
Battery Mode
power from battery and PV
power.
Power from battery only.
21
Fault Reference Code
Fault Code
Fault Event
01
Fan is locked when inverter is off.
02
Over temperature
03
Battery voltage is too high
04
Battery voltage is too low
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
11
Main relay 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
22
Icon on
Warning Indicator
Warning
Code
Warning Event
Audible Alarm
01
Fan is locked when
inverter is on.
Beep three times every
second
03
Battery is over-charged
Beep once every second
04
Low battery
Beep once every second
07
Overload
Beep once every 0.5 second
10
Output power derating
Beep twice every 3 seconds
12
13
14
Solar charger stops due
to low battery.
Solar charger stops due
to high PV voltage.
Solar charger stops due
to overload.
23
Icon flashing
SPECIFICATIONS
Table 1: Line Mode Specifications
INVERTER MODEL
3KVA
Input Voltage Waveform
Sinusoidal (utility or generator)
Nominal Input Voltage
120Vac
95Vac± 7V (UPS)
65Vac± 7V (Appliances)
100Vac± 7V (UPS);
70Vac± 7V (Appliances)
Low Loss Voltage
Low Loss Return Voltage
High Loss Voltage
140Vac± 7V
High Loss Return Voltage
135Vac± 7V
Max AC Input Voltage
150Vac
Nominal Input Frequency
50Hz / 60Hz (Auto-detection)
Low Loss Frequency
40± 1Hz
Low Loss Return Frequency
42± 1Hz
High Loss Frequency
65± 1Hz
High Loss Return Frequency
63± 1Hz
Output Short Circuit
Protection
Line mode: Circuit Breaker
Battery mode: Electronic Circuits
Max bypass current
Efficiency (Line Mode)
40A
>95% ( Rated R load, battery full charged )
10ms typical (UPS);
20ms typical (Appliances)
Transfer Time
120Vac model:
Output power derating:
When AC input voltage drops to
95V, the output power will be
derated.
Output Power
Rated Power
50% Power
65V
24
95V
140V
Input Voltage
Table 2: Inverter Mode Specifications
INVERTER MODEL
3KVA
3KVA/2.4KW
Rated Output Power
Output Voltage Waveform
Pure Sine Wave
Output Voltage Regulation
110/120VAC± 5%
60Hz or 50Hz
Output Frequency
90%
Peak Efficiency
Overload Protection
[email protected]≥150% load; [email protected]%~150% load
2* rated power for 5 seconds
Surge Capacity
Nominal DC Input Voltage
24Vdc
Cold Start Voltage
Low DC Warning Voltage
@ load < 20%
23.0Vdc
@ 20% ≤ load < 50%
21.4Vdc
@ load ≥ 50%
20.2Vdc
Low DC Warning Return
Voltage
@ load < 20%
23.0Vdc
@ 20% ≤ load < 50%
22.4Vdc
@ load ≥ 50%
21.2Vdc
Low DC Cut-off Voltage
@ load < 20%
21.0Vdc
@ 20% ≤ load < 50%
20.4Vdc
@ load ≥ 50%
19.2Vdc
22.0Vdc
High DC Recovery Voltage
29Vdc
High DC Cut-off Voltage
30Vdc
No Load Power Consumption
<50W
Saving Mode Power
Consumption
<15W
25
Table 3: Charging Mode Specifications
Utility Charging Mode
INVERTER MODEL
Charging Current (UPS)
@ Nominal Input Voltage
Flooded Battery
Bulk
Charging
AGM / Gel
Voltage
Battery
Floating Charging Voltage
Charging Algorithm
3KVA
2/10A/20/30A/40/50/60A
29.2
28.2
27Vdc
3-Step
Battery Voltage, per cell
Charging Current, %
2.43Vdc (2.35Vdc)
Voltage
2.25Vdc
100%
Charging Curve
50%
T0
T1
T1 = 10* T0, minimum 10mins, maximum 8hrs
Current
Bulk
(Constant Current)
Absorption
(Constant Voltage)
Maintenance
(Floating)
Time
Solar Charging Mode
INVERTER MODEL
Rated Power
Max. efficiency
Max. PV Array Open Voltage
Operating Voltage Range
PV Array MPPT Voltage
Range
Min. battery voltage for PV
charge
Standby Power Consumption
Battery Voltage Accuracy
PV Voltage Accuracy
Charging Algorithm
Joint Utility and Solar Charging
INVERTER MODEL
Max. Charging Current
Default Charging Current
3KVA with PWM
1250W
98.5%
80Vdc
30~40Vdc
3KVA with MPPT
2000W
98%
145Vdc
N/A
N/A
30~80Vdc
17Vdc
2W
+/-0.3%
+/-2V
3-Step
3KVA with PWM
110A
3KVA with MPPT
140A
60Amp
26
Table 4 General Specifications
INVERTER MODEL
Safety Certification
3KVA with PWM SCC
3KVA with MPPT SCC
CE
0°C to 55°C
-15°C~ 60°C
Operating Temperature Range
Storage temperature
Dimension (D*W*H), mm
Net Weight, kg
125 x 300 x 440
10.5
27
11
TROUBLESHOOTING
Problem
Unit shuts down
automatically
during startup
process.
No response after
power on.
Mains exist but the
unit works in
battery mode.
When the unit is
turned on, internal
relay is switched on
and off repeatedly.
LCD/LED/Buzzer
Explanation / Possible cause
LCD/LEDs and buzzer
will be active for 3
seconds and then
completely off.
The battery voltage is too low
(<1.91V/Cell)
1. Re-charge the battery.
2. Replace the battery.
No indication.
1. The battery voltage is far too
low. (<1.4V/Cell)
2. Battery polarity is connected
reversely.
1. Check if batteries and the
wiring are connected well.
2. Re-charge the battery.
3. Replace the battery.
Input voltage is
displayed as 0 on the
LCD and green LED is
flashing.
Input protector is tripped
Check if AC breaker is tripped
and AC wiring is connected
well.
Green LED is flashing.
Insufficient quality of AC power.
(Shore or Generator)
Green LED is flashing.
Set “Solar First” as the priority of
output source.
LCD display and LEDs
are flashing
Battery is disconnected.
Fault code 07
Overload error. The inverter is
overload by 110% and time is up.
Output short circuited.
Fault code 05
1. Check if AC wires are too
thin and/or too long.
2. Check if generator (if
applied) is working well or if
the setting range of input
voltage is correct.
(UPSAppliance)
Change output source priority
to Utility first.
Check if battery wires are
connected well.
Reduce the connected load by
switching off some
equipment.
Check if wiring is connected
well and remove abnormal
load.
The temperature of internal
converter is over 120°C. (Only
available for 1-3KVA models.)
The internal temperature of the
inverter is over 100°C.
Check whether the air flow of
the unit is blocked or whether
the ambient temperature is
too high.
Battery is over-charged.
Return to repair center.
The battery voltage is too high.
Check if spec and quantity of
the batteries meet the
requirements.
Fault code 01
Fan fault
Replace the fan.
Fault code 06/58
Output abnormal (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.
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 is burnt.
Fault code 02
Buzzer beeps
continuously and
red LED is on.
What to do
Fault code 03
28
Restart the unit, if the error
happens again, please return
it to repair center.
If the battery is connected
well, please return it to repair
center.
Appendix I: Approximate Back-up Time Table
Model
3KVA
Load (VA)
Backup Time @24Vdc 100Ah (min)
Backup Time @24Vdc 200Ah (min)
300
449
1100
600
222
525
900
124
303
1200
95
227
1500
68
164
1800
56
126
2100
48
108
2400
35
94
2700
31
74
3000
28
67
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.
29
Appendix II: 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 supported maximum output power is
14.4KW/18KVA.
2. Maximum six units work together to support three-phase equipment. Four units support one phase
maximum. The supported maximum output power is 14.4KW/18KVA and one phase can be up to
9.6KW/12KVA.
NOTE: If this unit is bundled with shared current cable and parallel cable, this inverter supports parallel
operation in default. You may skip section 3. If not, please purchase parallel kit and install this unit by following
instruction from professional technical personnel in local dealer.
2. Package Contents
In parallel kit, you will find the following items in the package:
Parallel board
Parallel communication cable
Current sharing cable
3. Parallel board installation
Step 1: Remove cover by loosening two screws as the diagram shown below.
Step 3: Before installing parallel board inside of the inverter, be sure to connect 2-pin and 14-pin cables as
shown in below chart.
30
Step 4: Simply slide in the parallel board and fix it to the inverter with 2 screws tightly. Now the inverter is in
parallel operation.
4. Mounting the Unit
When installing multiple units, please follow the illustration below.
NOTE: 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. Be sure to install each unit in the same height.
5. Wiring Connection
The size of the cable for each inverter is shown as below:
WARNING: Be sure the length of all battery cables is the same. Otherwise, there will be voltage difference
between inverter and battery which might cause mal-function of the parallel inverters.
Recommended battery cable and terminal size for each inverter:
Model
Wire Size
Torque value
3KVA
1*4AWG
2~ 3 Nm
Recommended cable size of AC input and output for each inverter:
Model
AWG no.
Torque
3KVA
8 AWG
1.4~1.6Nm
You need to connect the cables of each inverter together. Take the battery cables for example: You need to use
a connector or bus-bar as a joint to connect the battery cables together, and then connect it to the battery
terminal. The size of the cable used from joint to battery should be X times 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 battery and AC input side. This will ensure the inverter can be
31
securely 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 parallel diagrams in section 5-1 and 5-2.
Recommended specification of battery breaker for each inverter:
Model
1 unit*
3KVA
125A/30VDC
*If you want to use only one breaker at the battery side for the whole system, the rating of the breaker should
be X times current of 1 unit. “X” indicates the number of inverters connected in parallel.
Recommended specification of AC input breaker in single phase:
Model
2 units
3 units
4 units
5 units
6 units
3KVA
80A/230VAC
120A/230VAC
160A/230VAC
200A/230VAC
240A/230VAC
Note 1: You also can use only one 40A breaker for each inverter at its AC input.
Note 2: Regarding three-phase system, you can use 3-pole breaker directly and the rating of the breaker
should be compatible with the phase current limitation from the phase with maximum units.
Recommended battery capacity
Inverter parallel numbers
2
3
4
5
6
Battery Capacity
200AH
300AH
400AH
500AH
600AH
WARNING! Be sure that all inverters will share the same battery bank. Otherwise, the inverters will be
transferred to fault mode.
32
5-1. Parallel Operation in Single phase
Two inverters in parallel:
Power Connection
Communication Connection
Three inverters in parallel:
Power Connection
33
Communication Connection
Four inverters in parallel:
Power Connection
Communication Connection
34
Five inverters in parallel:
Power Connection
Communication Connection
Six inverters in parallel:
Power Connection
Communication Connection
35
5-2. Support 3-phase equipment
Two inverters in each phase:
Power Connection
Communication Connection
Four inverters in one phase and the rest two inverters for the other two phases:
Power Connection
Note: It’s up to customer’s demand to pick 4 inverters on any phase.
P1: L1-phase, P2: L2-phase, P3: L3-phase.
36
Communication Connection
Three inverters in one phase, another two inverters in second phase and the other inverter for the third
phase:
Power Connection
Communication Connection
Three inverters in one phase and only one inverter for each remaining phase:
Power Connection
37
Communication Connection
Two inverters in two phases and only one inverter for each remaining phase:
Power Connection
Communication Connection
38
Two inverters in one phase and only one inverter for each remaining phase:
Power Connection
Communication Connection
One inverter in each phase:
Power Connection
39
Communication Connection
WARNING: Do NOT connect the current sharing cables between the inverters in different phases. Otherwise,
it may damage the inverters.
6. PV Connection
Please refer to the user manual of single unit for PV Connection.
CAUTION: Each inverter should connect to PV modules separately.
40
7. LCD Setting and Display
Setting Program:
Program
Description
Selectable option
Single:
When the units are used in parallel with
single phase, please select “PAL” in program
28.
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 5-2 for detailed information.
Please select “3P1” in program 28 for the
inverters connected to L1 phase, “3P2” in
program 28 for the inverters connected to
L2 phase and “3P3” in program 28 for the
inverters connected to L3 phase.
Parallel:
28
AC output mode
*This setting is only
available when the
inverter is in standby
mode (Switch off).
L1 phase:
L2 phase:
Be sure to connect shared current cables to
units in the same phase.
Do NOT connect shared current cables
between units in different phases.
L3 phase:
Besides, power saving function will be
automatically disabled.
One Inverter
(Default):
30
PV judge condition
(Only apply for
setting “Solar first”
in program 1: Output
source priority)
All of Inverters:
41
When “ONE” is selected, as long as one of
the inverters has been connected to PV
modules and PV input is normal, parallel or
3-phase system will continue working
according to rule of “solar first” setting.
For example, two units are connected in
parallel and set “SOL” in output source
priority. If one of the two units has
connected to PV modules and PV input is
normal, the parallel system will provide
power to loads from solar or battery power.
If both of them are not sufficient, the
system will provide power to loads from
utility.
When “ALL” is selected, parallel or 3-phase
system will continue working according to
rule of “solar first” setting only when all of
inverters are connected to PV modules.
For example, two units are connected in
parallel and set “SOL” in output source
priority. When “ALL” is selected in program
30, it’s necessary to have all inverters
connected to PV modules and PV input is
normal to allow the system to provide
power to loads from solar and battery
power. Otherwise, the system will provide
power to loads from utility.
Fault code:
Fault Code
Fault Event
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
Different AC input voltage and frequency detected
85
AC output current unbalance
86
AC output mode setting is different
Icon on
8. Commissioning
Parallel in single phase
Step 1: Check the following requirements before installation:
 Correct wire connection
 Ensure all breakers in Line wires at load side are open and each Neutral wires of each unit is connected
together.
Step 2: Turn on each unit and set “PAL” in LCD setting program 28 of each unit. And then shut down all units.
NOET: It’s necessary to turn off switch when setting LCD program. Otherwise, the setting can not be
programmed.
Step 3: Turn on each unit.
LCD display in Master unit
LCD display in Slave unit
NOTE: Master and slave units are randomly defined.
42
Step 4: Switch on all AC breakers of Line wires in AC input. It’s better to connect all of the inverters to the utility
at the same time. If not, it will display fault 82 in the following inverters. However, these inverters will
automatically restart. If detecting AC connection, 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 installation:
 Correct wire connection
 Ensure all breakers in Line wires at load side are open and each Neutral wires of each unit is connected
together.
Step 2: Turn on all of the units and configure LCD program 28 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 can not 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 are
matched with unit setting, they will work normally. Otherwise, the AC icon
will flash and they will not work
in line mode. Under this circumstance, you can switch wires of AC inputs from L2 phase and L3 phase. Or you
may exchange the LCD program 28 of P2 and P3 to solve this problem.
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 in load side. This system will start to provide power to the
load.
Note 1: To avoid overload occurring, before turning on breakers at load side, it’s better to have the whole
system in operation first.
Note 2: There is some transfer time for this operation. Power interruption may happen to critical devices,
which cannot tolerate transfer time.
43
9. Troubleshooting
If the device fails to function as expected, check the list of common faults below before consulting the service
center.
Situation
Solution
Fault
Fault Event Description
Code
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 current sharing cables
Current feedback into
are connected to all inverters.
60
the inverter is
For supporting three-phase system, make sure the current sharing
detected.
cables are connected to the inverters in the same phase, and
disconnected to the inverters in different phases.
4. If the problem remains, please contact your installer.
1. Update the firmware of all inverter to the same version.
The firmware version
2. Check the version of each inverter via LCD setting and make sure the
71
of each inverter is not
CPU versions are the same. If not, please contact your installer to
the same.
provide the latest firmware to update.
3. After updating, if the problem still remains, please contact your installer.
The output current of
1. Check if shared cables are connected well and restart the inverter.
72
each inverter is
2. If the problem remains, please contact your installer.
different.
80
CAN data loss
1. Check if communication cables are connected well and restart the
81
Host data loss
inverter.
Synchronization data
2. If the problem remains, please contact your installer.
82
loss
1. Make sure all inverters share the same groups of batteries together.
2. Remove all loads and disconnect AC input and PV input. Then, check
The battery voltage of
battery voltage of all inverters. If the values from all inverters are close,
83
each inverter is not the
please check if all battery cables are in the same length and in the same
same.
material type. Otherwise, please contact your installer to provide SOP to
calibrate battery voltage of each inverter.
3. If the problem still remains, please contact your installer.
1. Check the utility wiring conncetion and restart the inverter.
AC input voltage and
2. Make sure utility starts up at same time. If there are breakers installed
84
frequency are detected
between utility and inverters, please be sure all AC input breakers can be
different.
turned on at same time.
3. If the problem remains, please contact your installer.
1. Restart the inverter.
2. Remove some excessive loads and re-check the load information from
AC output current
85
LCD of the inverters. If the values are different, please check if AC input
unbalance
and output cables are in the same length and in the same material type.
3. If the problem remains, please contact your installer.
1. Switch off the inverter and check LCD setting #28.
2. For parallel system in single phase, make sure no 3P1, 3P2 or 3P3 is set
AC output mode
86
on #28.
setting is different.
For supporting three-phase system, make sure no “PAL” is set on #28.
3. If the problem remains, please contact your installer.
44
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