MPP Solar 3KVA User manual

3KVA
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
Battery Connection ..........................................................................................................................................5
AC Input/Output Connection............................................................................................................................5
PV Connection.................................................................................................................................................7
Communication Connection.............................................................................................................................8
OPERATION .......................................................................................................................................................9
Power ON/OFF ................................................................................................................................................9
Operation and Display Panel...........................................................................................................................9
LCD Display Icons .........................................................................................................................................10
LCD Setting....................................................................................................................................................12
Display Setting...............................................................................................................................................16
Operating Mode Description..........................................................................................................................18
Fault Reference Code....................................................................................................................................20
Warning Indicator...........................................................................................................................................20
Battery Equalization Description....................................................................................................................21
SPECIFICATIONS .........................................................................................................................................23
TROUBLE SHOOTING.....................................................................................................................................26
Appendix I: Approximate Back-up Time Table ........................................................................................27

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 (150A, 32VDC)are 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.

2
INTRODUCTION
This is a multi-function inverter/charger, combining functions of inverter, AVR, solar charger and battery
charger to offer uninterruptible power for office and home appliances. 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
Built-in solar charge controller
Built in boost and buck AVR for voltage regulation
Configurable 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
Built-in 5V/3A USB charger port
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 (option)
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
6
2
45
8
1
7
3
1. Operation panel
2. Output sockets
3. USB charger ports
4. AC input
5. PV input
6. Battery connectors
7. Circuit breaker
8. USB and RS232 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 of package:
The unit x 1
User manual x 1
Software CD x 1
Battery cable x 1
PV connectors x 1
Communication cable x 2
Installation
Wall mounted
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 55°C to ensure optimal operation.
The recommended installation position is to be adhered to the wall vertically.
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.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.
Please follow the steps as below to finish the installation.
Drill three holes in the marked locations on a solid surface as shown in below chart. The reference
tightening torque is 3 Nm.
Mounting the unit by screwing three screws. It’s recommended to use M5 or M6 screws.
120mm
240mm
333mm

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 (typical 120A)
installed.
WARNING! All wiring connection must be performed by a qualified personnel.
Please follow below steps to implement battery connection:
1. This inverter supports 24VDC system. Connect all battery packs as below chart. It’s suggested to connect
at least 100Ah capacity battery.
2. Plug battery cable into the battery connectors of the unit. Make sure polarity at both the battery and the
inverter/charge is correctly connected.
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
(-).
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.
WARNING!! When using sockets as the output, please make sure that the current of each socket is less than
10A, in case of electric hazard.
WARNING! All wiring must be performed by qualified person.

6
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
Torque Value
3KVA
10 AWG
1.2~ 1.6 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 disconnect first.
2. Remove insulation sleeve 10mm for three 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. Make sure the wires are securely connected.
→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 to the unit.
4. Simply connect devices to the output sockets.
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.

7
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 proper recommended cable size as below.
Model
Typical Amperage
Cable Size
Torque
3KVA
25A
12 AWG
1.4~1.6 Nm
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.
Max. PV Array Open Circuit Voltage
60VDC
Recommended PV Array MPPT Voltage Range: Vmp*
30~50VDC
Max. charging current
25A
Note: * Vmp: panel max power point voltage.
The PV charging efficiency is maximized while PV system voltage is close to Best Vmp.
Maximum PV module numbers in Series: Vmpp of PV module * X pcs ≒Best Vmp of Inverter or Vmp
range
PV module numbers in Parallel: Max. charging current of inverter / Impp
Total PV module numbers = maximum PV module numbers in series * PV module numbers in
parallel
After considering Voc of PV module not exceed 60Vdc and max. Vmpp of PV module close to 60Vdc or within
30Vdc ~ 50Vdc, we can choose PV module with below specification.
Maximum Power (Pmax)
250W
Max. PV module numbers in series
1 30.9x 1 ≒30 ~ 50
Max. Power Voltage Vmpp(V)
30.9V
Max. Power Current Impp(A)
8.42A
PV module numbers in parallel
3 25 A / 8.42
Total PV module numbers
1 x 3 = 3
Open Circuit Voltage Voc(V)
37.7V
Short Circuit Current Isc(A)
8.89A
Maximum PV module numbers in Series: 1
PV module numbers in Parallel: 3
Total PV module numbers: 1 x 3 = 3
Please follow below steps to implement PV module connection:
1. Check the input voltage of PV array modules. The acceptable input voltage of the inverter is 60VDC (with
rated load). Please make sure that the maximum current of each PV input connector is 13A.
2. Disconnect the circuit breaker.
3. Assemble provided PV connectors with PV modules by appropriate crimping tool and
spanner. Prepare the cable and assemble connector as following process:
Strip one cable 8 mm on both end sides and be careful NOT to nick conductors.
Insert striped cable into female terminal and crimp female terminal as shown below.
Insert assembled cable into female connector housing as shown below.

8
Insert striped cable into male terminal and crimp male terminal as shown below.
Insert assembled cable into male connector housing as shown below.
Then, use spanner to screw pressure dome tightly to female connector and male connector as shown
below.
4. Check correct polarity of connection 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.
5. Make sure all PV connectors are firmly connected.
Communication Connection
This inverter is equipped with intelligent slot perfect to install with communication card such as SNMP or
Modbus. When installing with SNMP or Modbus card in the inverter, it will provide advanced communication and
monitoring options.
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 inside of CD.

9
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 LED 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 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
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

10
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.

11
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.

12
LCD Setting
After pressing and holding ENTER button for 3 seconds, the unit will enter setting mode. Press “SCROLL”
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
Solar first
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 the loads at
the same time.
Utility provides power to the loads
only when any one condition
happens:
- Solar energy is not available
- Battery voltage drops to either
low-level warning voltage or the
setting point in program 12.
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.
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)
15A
25A (default)
03
AC input voltage range
Appliances (default)
If selected, the transfer time is within
20ms between battery mode and line
mode

13
UPS
If selected, the transfer time is within
10ms between battery mode and line
mode
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.
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
11
Maximum utility charging
current
15A(default)
25A
12
Setting voltage point back
to utility source 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
13
Setting voltage point back
to battery mode when
selecting “SBU priority” or
“Solar first” in program 01.
Battery fully charged
24V
24.5V
25V

14
25.5V
26V
26.5V
27V (default)
27.5V
28V
28.5V
29V
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:
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.
Solar energy will charge battery only
when utility power is not available.
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 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.

15
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
26
Bulk charging voltage
(C.V voltage)
24V model default setting: 28.2V
If self-defined is selected in program 5, this program can be
set up. Setting range is from 24.0V to 29.2V for 24V model.
Increment of each click is 0.1V.
27
Floating charging voltage
24V model default to 27.0V
If self-defined is selected in program 5, this program can be
set up. Setting range is from 24.0V to 29.2V for 24V model.
Increment of each click is 0.1V.
29
Low DC cut-off voltage
24V model default setting: 21.0V
If self-defined is selected in program 5, this program can be
set up. Setting range is from 20.0V to 24.0V for 24V 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.
31
Battery equalization voltage
3KVA default setting: 29.2V
Setting range is from 25.0V to 30V for 3KVA 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.

16
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 “SELECT” key. The selectable information is
switched to display in order as below: input voltage/output voltage, input frequency, PV voltage, total
charging power, solar charging power, battery voltage/output frequency, main CPU Version and second
CPU Version.
Selectable information
LCD display
Input voltage/Output voltage
(Default Display Screen)
Input Voltage=120V, output voltage=120V
Input frequency/Output frequency
Input frequency=50Hz, output frequency =50Hz
PV voltage/Output voltage
PV voltage=40V, output voltage=120V
Solar charging power/Output voltage
Solar charging power=500W, output voltage=120V

17
Battery voltage/Load percentage
batt voltage 25.5V, Load percent=70%
Battery voltage/Load in VA
When connected load is lower than 1kVA, load in VA
will present xxxVA like below chart.
When load is larger than 1kVA (≧1KVA), load in VA
will present x.xkVA like below chart.
Battery voltage/Load in Watt
When load is lower than 1kW, load in W will present
xxxW like below chart.
When load is larger than 1kW (≧1KW), load in W will
present x.xkW like below chart.
Battery voltage/ Output frequency
Battery voltage=25.5V, output frequency = 50.0Hz

18
Main CPU version checking
Main CPU version U1.01.01
Secondary CPU version checking
Secondary CPU version U2.01.01
Operating Mode Description
Operation mode
Description
LCD display
Standby mode Note:
*Standby mode: The inverter is
not turned on yet but at this
time, the inverter can charge
battery without AC output.
No output is supplied by the
unit but it still can charge
batteries.
Charging by utility.
Charging by PV energy.
Charging by utility and PV energy.
No charging.
Fault mode
Note:
*Fault mode: Errors are caused
by inside circuit error or external
reasons such as over
temperature, output short
circuited and so on.
PV energy and utility can
charge batteries.
Charging by utility and PV energy.
Charging by utility.
Charging by PV energy.
No charging.