Must Power PV18 Series User manual

2KW-3KW

Table Of Contents
ABOUT THIS MANUAL .......................................................................................
Purpose ..........................................................................................................
Scope .............................................................................................................
SAFETY INSTRUCTIONS. ...................................................................................
INTRODUCTION. ..............................................................................................
Features .........................................................................................................
Basic System Architecture ..................................................................................
Product Overview .............................................................................................
INSTALLATION. ...............................................................................................
Unpacking and Inspection .................................................................................
Preparation ....................................................................................................
Mounting the Unit ............................................................................................
Battery Connection ...........................................................................................
AC Input/Output Connection ..............................................................................
PV Connection ................................................................................................
Final Assembly ...............................................................................................
Communication Connection.............................................................................
OPERATION ...................................................................................................
Power ON/OFF ...............................................................................................
Operation and Display Panel .............................................................................
LCD Display Icons ...........................................................................................
LCD Setting ...................................................................................................
Fault Reference Code ......................................................................................
Warning Indicator ..........................................................................................
Operating Mode Description .............................................................................
Display Setting ...............................................................................................
SPECIFICATIONS. ..........................................................................................
Table 1 Line Mode Specications ........................................................................
Table 2 Inverter Mode Specications ..................................................................
Table 3 Charge Mode Specications ....................................................................
Table 4 General Specications ...........................................................................
TROUBLE SHOOTING. .....................................................................................
Appendix: Approximate Back-up Time Table. ...................................................
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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.
The following cases are not within the scope of warranty:
(1) Out of warranty.
(2) Series number was changed or lost.
(3) Battery capacity was declined or external damaged.
(4) Inverter was damaged caused of transport shift, remissness, ect external factor.
(5) Inverter was damaged caused of irresistible natural disasters.
(6) Not in accordance with the electrical power supply conditions or operate environment
caused damage.
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 qualied service center when service or repair is required.
Incorrect re-assembly may result in a risk of electric shock or re.
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 qualied 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 (1 piece of 150A,63VDC for 2KW and 3KW) 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 qualied 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.

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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-congurable 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
Congurable input voltage range for home appliances and personal computers via LCD setting
Congurable battery charging current based on applications via LCD setting
Congurable 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 (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 ofce environment, including motor-type
appliances such as tube light, fan, refrigerator and air conditioner.
Figure 1 Hybrid Power System

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2-3KW single model
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. RS-485 communication port
13. USB
13
Product Overview

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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
USB cable x 1
Software CD X 1
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 ammable 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. 200 mm to the side and approx.
300 mm 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 keep other objects and surfaces as shown
in the below diagram to guarantee sufcient heat
dissipation and to have enough space for removing
wires.
SUITABLE FOR MOUNTING ON CONCRETE OR
OTHER NON-COMBUSTIBLE SURFACE ONLY.
300mm
200mm
300mm

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Install the unit by screwing three screws.
Battery Connection
CAUTION: To 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 beaker size.
WARNING! All wiring must be performed by a qualied personnel.
WARNING! It's very important for system safety and efcient operation
to use appropriate cable for battery connection. To reduce risk of injury,
please use the proper recommended cable and terminal size as below.
Recommended battery cable and terminal size:
2~3KW
Model Typical Amperage Battery capacity Wire Size
2KW
3KW
66A
100A 200AH
200AH
100AH
100AH
1*6AWG
2*10AWG
1*4AWG
2*8AWG
18
18
Please follow below steps to implement battery connection:
1. Assemble battery ring terminal based on recommended battery cable and terminal size.
2. 1KW model supports 12VDC system. Connect all battery packs as below chart, It’s suggested
to connect at least 100Ah capacity battery for 1KW model. 2KW/3KW model supports 24VDC
system. Connect all battery packs as below chart, It’s suggested to connect at least 100Ah
capacity battery for 2KW-3KW model.
Inverter 2KW/3KW
12V 12V

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3. Insert the ring terminal of battery cable atly into battery connector of inverter and make sure
the bolts are tightened with torque of 2-3 Nm. Make sure polarity at both the battery and the
inverter/charge is correctly connected and ring terminals are tightly screwed to the battery
terminals.
WARNING: Shock Hazard
Installation must be performed with care due to high battery voltage in series.
CAUTION!! Do not place anything between the at part of the inverter terminal and the
ring terminal. Otherwise, overheating may occur.
CAUTION!! Do not apply anti-oxidant substance on the terminals before terminals are
connected tightly.
CAUTION!! Before making the nal DC connection or closing DC breaker/disconnector,
be sure DC (+) must be connected to DC (+) and DC (-) must be connected to DC (-).
DC+ DC-
WARNING! All wiring must be performed by a qualied personnel.
WARNING! It's very important for system safety and efcient 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
2KW 14AWG 0.8~1.0Nm
3KW 12AWG 1.2~1.6Nm
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 20A for 2KW, 32A for 3KW.
CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Please do NOT-misconnect
Input and output connectors.
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 rst.
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 ( )rst.

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→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)
WARNING:
Be sure to 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 ( )rst.
→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 working in parallel operation.
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 qualied personnel.
WARNING! It's very important for system safety and efcient operation to use appropriate cable
for PV module connection. To reduce risk of injury, please use the proper recommended cable size
as below.
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.
PV Connection

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Cable Size Torque Value
2KW~3KW
8AWG 1.4~1.6Nm
Typical Amperage
PV Module Selection:
When selecting proper PV modules, please be sure to consider below requirements rst:
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
Charging Current 80A
MPPT charger
60A
Typical Amperage
60A
Solar Charging Mode
Min. battery voltage for PV charge
PV Array MPPT Voltage Range 30~130Vdc
145Vdc
Max. PV Array Open Circuit Voltage
17Vdc
2KW~3KW
24Vdc
System DC Voltage
6AWG 2.0~2.4Nm 80A
3. Make sure the wires are securely connected.
Recommended PV module configuration
PV Module Spec. (reference)
-260Wp
-Vmp:30.9Vdc
-Imp:8.42A
-Voc:37.7Vdc
-Isc:8.89A
-Cells:60
Inverter Model Solar Input Q’ty of modules
3S4P 12PCS
Please follow below steps to implement PV module connection:
1. Remove insulation sleeve 10 mm for positive and negative conductors.
2. 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.
PV+ PV-
MPPT-60A 3S3P 9PCS
MPPT-80A

MPPT-60A
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Solar panel installation schematic
MPPT-80A
Final Assembly
After connecting all wirings, please put bottom cover back by screwing two screws as shown below.

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A
Below chart show RJ45 Pins denition
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.
WARNING: It’s forbidden to use network cable as the communication cable to directly communicate
with the PC port. Otherwise, the internal components of the controller will be damaged.
WARNING: RJ45 interface is only suitable for the use of the company’s supporting products or
professional operation.

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LED Indicator
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 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 Messages
Green
Yellow
Red
Solid On
Solid On
Flashing
Flashing
Flashing
Output is powered by grid in Line mode.
Output is powered by battery or PV in battery mode.
Battery is charging or discharging.
Fault occurs in the inverter.
Warning condition occurs in the inverter.
Function Keys
Function Keys Description
MENU
UP
DOWN
ENTER
Enter reset mode or setting mode go to previous selection.
Increase the setting data.
Decrease the setting data.
Enter setting mode and Conrm the selection in setting mode go to next
selection or exit the reset mode.

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LCD Display Icons
Icon Function description
Input Source Information and Output Information
Indicates the AC information.
Indicates the DC information.
Indicate input voltage, input frequency, PV voltage, battery voltage and charger
current.
Indicate output voltage, output frequency, load in VA, load in Watt and
discharging current.
Configuration Program and Fault Information
Indicates the setting programs.
Indicates the warning and fault codes.
Warning: ashing with warning code.
Fault: lighting with fault code.
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
Batteries are fully charged.
> 2.167 V/cell
2.083 ~ 2.167V/cell
2 ~ 2.083V/cell
<2V/cell 4 bars will ash in turns.
Bottom bar will be on and the other three bars will
ash in turns.
Bottom two bars will be on and the other two bars
will ash in turns.
Bottom three bars will be on and the top bar will
ash.
4 bars will be on.

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In battery mode, it will present battery capacity.
Load Percentage Battery Voltage LCD Display
Load >50%
< 1.717V/cell
1.717V/cell ~ 1.8V/cell
1.8 ~ 1.883V/cell
> 1.883 V/cell
50%> Load > 20%
< 1.817V/cell
1.817V/cell ~ 1.9V/cell
1.9 ~ 1.983V/cell
> 1.983V/cell
Load < 20%
< 1.867V/cell
1.867V/cell ~ 1.95V/cell
1.95 ~ 2.033V/cell
> 2.033V/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 connected to the mains.
Indicates unit connected to the PV panel.
Indicates load is supplied by utility power.
Indicates the solar charger is working.
Indicates the DC/AC inverter circuit is working.
Mute Operation
Indicates unit alarm is disabled.

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LCD Setting
After pressing and holding "ENTER" button for 2 seconds, the unit will enter setting mode, and then,
press "ENTER" or "MENU" button to conrm the selection and exit. Press "UP" or "DOWN" button to
select setting programs.
Setting Programs:
Program Description Selectable option
Solar energy provides power to
the loads as rst priority. If
battery voltage has been higher
than the setting point in
program 21 for 5 minutes, the
inverter will turn to battery
mode, solar and battery will
provide power to the load at the
same time. When the battery
voltage drops to the setting
point in program 20, the
inverter will turn to bypass
mode, utility provides power to
the load only, and the solar will
charge the battery at the same
time.
Solar energy provides power to
the loads as rst priority. If
battery voltage has been higher
than the setting point in program
21 for 5 minutes, and the solar
energy has been available for 5
minutes too, the inverter will
turn to battery mode, solar and
battery will provide power to
the load at the same time.
When the battery voltage drops
to the setting point in program
20, the inverter will turn to bypass
mode, utility provides power to
the load only, and the solar will
charge the battery at the same
time.
Exit setting mode
Output source priority
selection
Escape
(default) Utility will provide power to the
loads as rst priority. Solar and
battery energy will provide power
to the loads only when utility
power is not available.

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AC input voltage range
If selected, acceptable AC input
voltage range will be within 90-
280VAC.
If selected, acceptable AC input
voltage range will be within
170-280VAC.
If selected, acceptable AC input
voltage range will conform to
VDE4105(184VAC-253VAC)
When the user uses the device
to connect the generator, select
the generator mode.
Set the output voltage
amplitude,(220VAC-240VAC)
Output voltage
Output frequency
Solar energy provides power to
charge battery as rst priority
Solar energy provides power to
the loads as rst priority
Solar supply priority
50HZ(default) 60HZ
Appliances (default)
UPS
VDE
GEN
Overload bypass: When
enabled, the unit will
transfer to line mode if
overload occurs in battery
mode.
Bypass disable Bypass enable (default)
If this inverter/charger is working in Line, Standby or
Fault mode, charger source can be programmed as
below:
Solar energy will charge battery
as rst priority. Utility will
charge battery only when solar
energy is not available.
Solar rst
Auto restart when
overload occurs
Auto restart when over
temperature occurs
Restart enableRestart disable
(default)
Restart enable
Restart disable
(default)
Charger source priority:
To congure charger
source priority
(default)

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Solar energy and utility will
charge battery at the same
time.
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 sufcient.
Solar and Utility
(default)
Only Solar
Maximum charging
current: To congure total
charging current for solar
and utility chargers.(Max.
charging current=utility
charging current +solar
charging current)
20A (default) 30A Maximum current ( )
AGM (default) Flooded
GEL LEAD
Battery type
60A (default)
Lithium Ion User-Dened
If "User-Dened" LI is selected, battery charge
voltage and low DC cut-off voltage can be set up in
program 17, 18 and 19.
Bulk charging voltage
(C.V voltage)
Setting range is from 1 A to 80A.
Increment of each click is 1A.
Maximum utility charging
current
Setting range is from 1 A to 80A.
Increment of each click is 1A.
80A (default)
If "User-Dened" LI is selected in program 14, this
program can be set up. Setting range is from 24.0V to
29.2V for 24Vdc model. Increment of each click is 0.1V
Floating charging
voltage If "User-Dened" LI is selected in program 14, this
program can be set up, Setting range is from 24.0V to
29.2V for 24Vdc model. Increment of each click is 0.1V.

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Low DC cut off battery
voltage setting
Battery stop discharging
voltage when grid is
available
23V (default) Setting range is from 22.0V to
29.0V
Increment of each click is 0.1V
If "User-Dened" LI is selected in program 14, this
program can be set up. Setting range is from 20.0V to
24.0V for 24Vdc model. Increment of each click is 0.1V.
Low DC cut-off voltage will be xed to setting value no
matter what percentage of load is connected.
Setting range is from 22.0V to
29.0V.
Increment of each click is 0.1V
27.0V (default)
Battery stop charging
voltage when grid is
available
If selected, the display screen
will auto turn the display page.
If selected, the display screen
will stay at latest screen user
nally switches.
(default)
Auto turn page
Backlight on
Backlight control
Backlight off(default)
Alarm control
Beeps while primary
source is interrupted
Record Fault code
Alarm on (default) Alarm off
Alarm on Alarm off (default)
Record enable
(default)
Record disable
After pressing and holding “MENU” button for 6 seconds, the unit will enter reset model. Press “Up”and
“DOWN” button to select programs. And then ,press “ENTER” button to exit.
Reset setting enable.
Reset setting disable.
(default)