MPP Solar LV2424 User manual

Hybrid 1KW-5KW
INVERTER / CHARGER
Version: 1.1
User Manual

Table Of Contents
ABOUT THIS MANUAL ......................................................................................................................................1
Purpose............................................................................................................................................................1
Scope...............................................................................................................................................................1
SAFETY INSTRUCTIONS...................................................................................................................................1
INTRODUCTION.................................................................................................................................................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
Communication Connection.............................................................................................................................8
Dry Contact Signal...........................................................................................................................................8
OPERATION........................................................................................................................................................9
Power ON/OFF ................................................................................................................................................9
Operation and Display Panel...........................................................................................................................9
LCD Display Icons .........................................................................................................................................10
LCD Setting....................................................................................................................................................11
Display Setting...............................................................................................................................................21
Operating Mode Description..........................................................................................................................24
SPECIFICATIONS.............................................................................................................................................28
TROUBLE SHOOTING.....................................................................................................................................29
PARALLEL FUNCTION (only for 2.4KW/3KW/4KW/5KW models)...............................................................30

1
ABOUT THIS MANUAL
Purpose
This manual describes the assembly, installation, operation and troubleshooting of this unit. Please read
this manual carefully before installations and operations. Keep this manual for future reference.
Scope
This manual provides safety and installation guidelines as well as information on tools and wiring.
SAFETY INSTRUCTIONS
WARNING: This chapter contains important safety and operating instructions. Read and
keep this manual for future reference.
1. Before using the unit, read all instructions and cautionary markings on the unit, the batteries and all
appropriate sections of this manual.
2. CAUTION --To reduce risk of injury, charge only deep-cycle lead acid type rechargeable batteries.
Other types of batteries may burst, causing personal injury and damage.
3. Do not disassemble the unit. Take it to a qualified service center when service or repair is required.
Incorrect re-assembly may result in a risk of electric shock or fire.
4. To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning.
Turning off the unit will not reduce this risk.
5. CAUTION –Only qualified personnel can install this device with battery.
6. NEVER charge a frozen battery.
7. For optimum operation of this inverter/charger, please follow required spec to select appropriate cable
size. It’s very important to correctly operate this inverter/charger.
8. Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop
a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please
refer to INSTALLATION section of this manual for the details.
10. Fuses (3 pieces of 40A, 32VDC for 1KW, 4 pieces of 40A, 32VDC for 2KW and 1 piece of 200A, 58VDC
for 2.4KW, 3KW, 4KW and 5KW) 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 hybrid PV inverter can provide power to connected loads by utilizing PV power, utility power and battery
power.
Figure 1 Basic hybrid PV System Overview
Depending on different power situations, this hybrid inverter is designed to generate continuous power from PV
solar modules (solar panels), battery, and the utility. When MPP input voltage of PV modules is within
acceptable range (see specification for the details), this inverter is able to generate power to feed the grid
(utility) and charge battery. Galvanic isolation designed between PV/DC and AC output, so that user could
connect any type of PV array to this Hybrid inverter. See Figure 1 for a simple diagram of a typical solar system
with this hybrid inverter.

3
Product Overview
2.4KW/3KW/4KW 5KW
NOTE: For parallel model installation and operation, please check separate parallel installation guide for
the details.
1. LCD display 9. PV connectors
2. Status indicator 10. Battery connectors
3. Charging indicator 11. Circuit breaker
4. Fault indicator 12. Parallel communication cable
5. Function buttons 13. Current sharing cable
6. Power on/off switch 14. Dry contact
7. Grid connectors 15. RS-232 communication port
8. AC output connectors (Load connection) 16. USB communication port
1KW/2KW

4
INSTALLATION
Unpacking and Inspection
Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should
have received the following items inside of package:
The unit x 1, User manual x 1, Communication cable x 1, Software CD x 1
Preparation
Before connecting all wirings, please take off bottom cover by removing two screws as shown below.
Mounting the Unit
Consider the following points before selecting where to install:
Do not mount the inverter on flammable construction
materials.
Mount on a solid surface
Install this inverter at eye level in order to allow the LCD
display to be read at all times.
The ambient temperature should be between 0°C and 55°C
to ensure optimal operation.
The recommended installation position is to be adhered to
the wall vertically.
Be sure to keep other objects and surfaces as shown in the
right diagram to guarantee sufficient heat dissipation and
to have enough space for removing wires.
SUITABLE FOR MOUNTING ON CONCRETE OR
OTHER NON-COMBUSTIBLE SURFACE ONLY.
Install the unit by screwing three screws. It’s recommended to use M4 or M5 screws.
1KW-4KW model 5KW model

5
Battery Connection
CAUTION: For safety operation and regulation compliance, it’s requested to install a separate DC over-current
protector or disconnect device between battery and inverter. It may not be requested to have a disconnect
device in some applications, however, it’s still requested to have over-current protection installed. Please refer
to typical amperage in below table as required fuse or breaker size.
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use
appropriate cable for battery connection. To reduce risk of injury, please use the
proper recommended cable and terminal size as below.
Recommended battery cable and terminal size:
Model
Typical
Amperage
Battery
Capacity
Wire Size
Ring Terminal
Torque
Value
Cable
mm2
Dimensions
D (mm)
L (mm)
1KW, 2KW,
2.4KW, 3KW,
4KW
140A
200AH
1*2AWG
38
6.4
39.2
2~3 Nm
2*6AWG
28
6.4
33.2
5KW
180A
600AH
2*4AWG
44
10.5
55
10~12 Nm
Please follow below steps to implement battery connection:
1. Assemble battery ring terminal based on recommended battery cable and terminal size.
2. Insert the ring terminal of battery cable flatly 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 flat part of the inverter terminal and the ring
terminal. Otherwise, overheating may occur.
CAUTION!! Do not apply anti-oxidant substance on the terminals before terminals are connected
tightly.
CAUTION!! Before making the final DC connection or closing DC breaker/disconnector, be sure
positive (+) must be connected to positive (+) and negative (-) must be connected to negative (-).
Ring terminal:

6
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.
CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-connect input
and output connectors.
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for AC input
connection. To reduce risk of injury, please use the proper recommended cable size as below.
Suggested cable requirement for AC wires
Model
Gauge
Torque Value
1KW
16 AWG
0.5 ~ 0.6 Nm
2KW
14 AWG
0.8 ~ 1.0 Nm
2.4KW
10 AWG
1.4 ~ 1.6 Nm
3KW
12 AWG
1.2 ~ 1.6 Nm
4KW
10 AWG
1.4 ~ 1.6 Nm
5KW
10 AWG
1.4 ~ 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 disconnector first.
2. Remove insulation sleeve 10mm for six conductors. And shorten phase L and neutral conductor N 3 mm.
3. Insert AC input wires according to polarities indicated on terminal block and tighten the terminal screws. Be
sure to connect PE protective conductor ( ) first.
→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)
WARNING:
Be sure that AC power source is disconnected before attempting to hardwire it to the unit.
4. Then, insert AC output wires according to polarities indicated on terminal block and tighten terminal screws.
Be sure to connect PE protective conductor ( ) first.
→Ground (yellow-green)
L→LINE (brown or black)

7
N→Neutral (blue)
5. Make sure the wires are securely connected.
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
1KW, 2KW, 2.4KW, 3KW, 4KW
80A
6AWG
2.0~2.4Nm
5KW
PV 1
60A
8AWG
2.0~2.4Nm
PV 2
60A
8AWG
2.0~2.4Nm
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.
Solar Charging Mode
INVERTER MODEL
1KW
2KW
2.4KW
3KW
4KW
5KW
Max. PV Array Open Circuit Voltage
145Vdc
PV Array MPPT Voltage Range
15~115Vdc
30~115Vdc
60~115Vdc
MPP Number
1
1
1
1
1
2
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
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
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.

8
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.
Recommended PV module Configuration
PV Module Spec.
(reference)
- 250Wp
- Vmp: 30.7Vdc
- Imp: 8.15A
- Voc: 37.4Vdc
- Isc: 8.63A
- Cells: 60
Inverter Model
SOLAR INPUT 1
SOLAR INPUT 2
Q'ty of modules
1KW
2S2P
N/A
4pcs
2KW, 2.4KW
2S4P
N/A
8pcs
3KW, 4KW
2S8P
N/A
16pcs
3S5P
N/A
15pcs
5KW
2S6P
2S6P
24pcs
3S4P
3S4P
24pcs
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.
Dry Contact Signal
There is one dry contact (3A/250VAC) available on the rear panel. It could be used to deliver signal to external
device when battery voltage reaches warning level.
Unit Status
Condition
Dry contact port:
NC & C
NO & C
Power Off
Unit is off and no output is powered.
Close
Open
Power On
Output is powered from Utility.
Close
Open
Output is
powered
from
Battery or
Solar.
Program 01
set as SUB
Battery voltage < Low DC warning
voltage
Open
Close
Battery voltage > Setting value in
Program 21 or battery charging
reaches floating stage
Close
Open
Program 01
is set as
SBU
Battery voltage < Setting value in
Program 20
Open
Close
Battery voltage > Setting value in
Program 21 or battery charging
reaches floating stage
Close
Open

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 button of the case) to turn on the unit.
Operation and Display Panel
The operation and display panel, shown in below chart, is on the front panel of the inverter. It includes
three indicators, four function keys and a LCD display, indicating the operating status and input/output
power information.
LED Indicator
LED Indicator
Messages
Green
Solid On
Output is powered by utility in Line mode.
Flashing
Output is powered by battery or PV in battery mode.
Green
Solid On
Battery is fully charged.
Flashing
Battery is charging.
Red
Solid On
Fault occurs in the inverter.
Flashing
Warning condition occurs in the inverter.
Function Keys
Function Key
Description
ESC
To exit setting mode
UP
To go to previous selection
DOWN
To go to next selection
ENTER
To confirm the selection in setting mode or enter setting mode
LED indicators
Function keys
LCD display

10
LCD Display Icons
Icon
Function
Input source information
Indicates the AC input
Indicates the 1st PV panel input
Indicates the 2nd PV panel input
Left digital display information
Indicate input voltage, input frequency, battery voltage, PV1 voltage, PV2
voltage, charger current
Middle digital display information
Indicates the setting programs.
Indicates the warning and fault codes.
Warning: Flashing with warning code
Fault: display with fault code
Right digital display information
Indicate the output voltage, output frequency, load percent, load VA, load
W, PV1 charger power, PV2 charger power, DC discharging current.
Battery information
Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% and
charging status.
Indicates the battery type: AGM, Flooded or User-defined battery.
Load information
Indicates overload.
Indicates the load level by 0-24%, 25-50%, 50-74%, and 75-100%.
0%~25%
25%~50%
50%~75%
75%~100%

11
Mode operation information
Indicates unit connects to the mains.
Indicates unit connects to the 1st PV panel
Indicates unit connects to the 2nd PV panel
Indicates the solar charger is working
Indicates the DC/AC inverter circuit is working.
Mute operation
Indicates unit alarm is disabled.
LCD Setting
After pressing and holding ENTER button for 3 seconds, the unit will enter setting mode. Press “UP” or “DOWN”
button to select setting programs. And then, press “ENTER” button to confirm the selection or ESC button to
exit.
Program
Description
Selectable option
00
Exit setting mode
Escape
01
Output source priority selection
Solar energy provides power to the
loads as first priority.
If solar energy is not sufficient to
power all connected loads, Utility
energy will supply power to the
loads at the same time.
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 20 or
solar and battery is not sufficient.

12
02
AC input voltage range
Appliances (default)
If selected, acceptable AC input
voltage range will be within
90-280VAC for output voltage at
220/230/240Vac or 65-140VAC for
output voltage at 101/110/120Vac.
UPS
If selected, acceptable AC input
voltage range will be within
170-280VAC for output voltage at
220/230/240Vac or 85-140VAC for
output voltage at 101/110/120Vac.
03
Output voltage
101Vac
If selected, acceptable feed-in grid
voltage range will be 89~111VAC.
110Vac
If selected, acceptable feed-in grid
voltage range will be 97~121VAC.
120Vac(Default)
If selected, acceptable feed-in grid
voltage range will be 106~132VAC.
220Vac
If 220Vac, 230Vac or 240Vac is
selected for output voltage, please
also set up country customized
regulations in program 34 to
determine acceptable feed-in grid
voltage and frequency range.
230V (Default)
240Vac
04
Output frequency
50Hz (default)
If choosing 101, 110 or 120Vac in
program 03 and 50Hz is selected
here, output frequency is 50Hz and
acceptable feed-in grid frequency
range will be 47.5~51.5Hz.
If choosing 220, 230 or 240Vac in
program 03 and 50Hz is selected
here, the output frequency is 50Hz.
60Hz
If choosing 101, 110 or 120Vac in
program 03 and 60Hz is selected
here, output frequency is 60Hz and
acceptable feed-in grid frequency
range will be 57.5~61.5Hz.
If choosing 220, 230 or 240Vac in
program 03 and 60Hz is selected
here, the output frequency is 60Hz.
05
Solar supply priority
Solar energy provides power to
charge battery as first priority.

13
Solar energy provides power to the
loads as first priority.
06
Overload bypass:
When enabled, the unit will
transfer to line mode if
overload occurs in battery
mode.
Bypass disable
(default)
Bypass enable
07
Auto restart when overload
occurs
Restart disable
(default)
Restart enable
08
Auto restart when over
temperature occurs
Restart disable
(default)
Restart enable
09
Solar or battery energy feed to
grid configuration
Solar or battery energy feed to grid
disable.
Solar or battery energy feed to grid
enable.
10
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.
Solar and Utility
(default)
Solar energy and utility will charge
battery at the same time.
Only Solar
Solar energy will be the only charger
source no matter utility is available
or not.
If this inverter/charger is working in Battery mode or Power
saving mode, only solar energy can charge battery. Solar
energy will charge battery if it's available and sufficient.
11
Maximum charging current:
To configure total charging
current for solar and utility
chargers.
(Max. charging current = utility
charging current + solar
charging current)
60A (default)
For 1KW~4KW models, setting
range is from 10A to 140A.
For 5KW model, setting range is
from 10A to 180A.
Increment of each click is 10A.

14
13
Maximum utility charging
current
2A
10A
20A
30A (default)
40A
50A
60A
14
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 17, 18 and 19.
17
Bulk charging voltage
(C.V voltage)
12V model default setting: 14.1V
24V model default setting: 28.2V
48V model default setting: 56.4V
If self-defined is selected in program 14, this program can be
set up. Setting range is from 12.0V to 15.3V for 12Vdc model,
24.0V to 30.6V for 24Vdc model and 48.0V to 58.4V for 48Vdc
model. Only for 2.4KW model, setting range is from 24.0V to
29.2V. Increment of each click is 0.1V.
18
Floating charging voltage
12V model default setting: 13.5V

15
18
Floating charging voltage
24V model default setting: 27.0V
48V model default setting: 54.0V
If self-defined is selected in program 14, this program can be
set up. Setting range is from 12.0V to 15.3V for 12Vdc model,
24.0V to 30.6V for 24Vdc model and 48.0V to 58.4V for 48Vdc
model. Only for 2.4KW model, setting range is from 24.0V to
29.2V. Increment of each click is 0.1V.
19
Low DC cut off battery voltage
setting
12V model default setting: 10.2V
24V model default setting: 20.4V
48V model default setting: 40.8V
If self-defined is selected in program 14, this program can be
set up. Setting range is from 10.2V to 12.0V for 12Vdc model,
20.4V to 24V for 24Vdc model and 40.8V to 48.0V for 48Vdc
model. Only for 2.4KW model, setting range is from 20.0V to
24V. 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.
20
Battery stop discharging
voltage when grid is available
Available options for 12V models:
11.0V
11.3V
11.5V (default)
11.8V
12.0V
12.3V

16
20
Battery stop discharging
voltage when grid is available
12.5V
12.8V
Available options for 24V models:
22.0V
22.5V
23.0V (default)
23.5V
24.0V
24.5V
25.0V
25.5V
Available options for 48V models:
44.0V
45.0V
46.0V (default)
47.0V
48.0V
49.0V
50.0V
51.0V
21
Battery stop charging voltage
when grid is available
Available options for 12V models:
Battery fully charged
12.0V

17
21
Battery stop charging voltage
when grid is available
12.3V
12.5V
12.8V
13.0V
13.3V
13.5V (default)
13.8V
14.0V
14.3V
14.5V
Available options for 24V models:
Battery fully charged
24V
24.5V
25V
25.5V
26V
26.5V
27V (default)
27.5V
28V
28.5V
29V

18
21
Battery stop charging voltage
when grid is available
Available options for 48V models:
Battery fully charged
48.0V
49.0V
50.0V
51.0V
52.0V
53.0V
54.0V
55.0V
56.0V
57.0V
58.0V
22
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.
23
Backlight control
Backlight on (default)
Backlight off
24
Alarm control
Alarm on (default)
Alarm off
25
Beeps while primary source is
interrupted
Alarm on (default)
Alarm off