Axpert MLV-5KW-48V User manual

LV 5KVA-48V
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
Preparation ........................................................................................................................................ 4
Mounting the Unit............................................................................................................................... 4
Battery Connection ............................................................................................................................. 6
AC Input/Output Connection................................................................................................................ 7
PV Connection.................................................................................................................................... 9
Final Assembly ................................................................................................................................. 10
Communication Connection ............................................................................................................... 12
Dry Contact Signal............................................................................................................................ 12
OPERATION................................................................................................................................... 13
Power ON/OFF ................................................................................................................................. 13
Operation and Display Panel .............................................................................................................. 13
LCD Display Icons............................................................................................................................. 14
LCD Setting...................................................................................................................................... 16
Display Setting ................................................................................................................................. 23
Operating Mode Description .............................................................................................................. 25
Fault Reference Code........................................................................................................................ 27
Warning Indicator............................................................................................................................. 28
SPECIFICATIONS .......................................................................................................................... 29
Table 1: Line Mode Specifications ...................................................................................................... 29
Table 2: Inverter Mode Specifications................................................................................................. 30
Table 3: Charging Mode Specifications................................................................................................ 31
Table 4 General Specifications ........................................................................................................... 32
TROUBLESHOOTING ..................................................................................................................... 33
Appendix I: Approximate Back-up Time Table............................................................................. 34
Appendix II: Parallel function....................................................................................................... 35

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 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.

2
INTRODUCTION
This is a multi-functional inverter/charger, combining the functions of inverter, 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 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

3
Product Overview
1. Battery input
2. Power on/off switch
3. Dry contact
4. USB communication port
5. RS232 communication port
6. PV input
7. Parallel communication port (only for parallel model)
8. Current sharing port (only for parallel model)
9. Parallel ID
10. AC output
11. Circuit breaker
12. AC input
13. LCD display
14. Status indicator
15. Charging indicator
16. Fault indicator

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 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 six 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 four screws as shown in the diagram.
It’s recommended to use M5 screws.

5

6
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 Battery Capacity Wire Size Ring Terminal Torque Value
Cable
mm2Dimensions
D (mm) L (mm)
5KW 220A 200AH
1*1/0AWG 60 8.4 49.7 5~6 Nm
2*4AWG 44 8.4 49.7
Please follow the steps below to implement the battery connection:
1. Assemble battery ring terminal based on recommended battery cable and terminal size.
2. Connect all battery packs as units requires. It’s suggested to connect at least 200Ah capacity battery for
5KW model.
3. Insert the ring terminal of battery cable flatly into battery connector of inverter and make sure the bolts are
tightened with torque of 5-6 Nm. Make sure polarity at both the battery and the inverter is correctly
connected and ring terminals are tightly screwed to the battery terminals.
4. Connect all battery packs as below chart.
Ring terminal:

7
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 5KVA.
CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-connect input
and output connectors.
WARNING! All wiring must be performed by the qualified personnel.
WARNING! The AC input N wire must be connected, Otherwise, the inverter will NOT detect AC input;
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
Model Gauge Torque Value
5KVA 10 AWG 1.4~ 1.6Nm
There are three applications for different AC input as shown in the figure below. For phase angle operation,
please refer to LCD #28

8
MLV 5KW
L1
N
Grid
connection Load
Output
L1
N
L2 L2
L1
L2
N
L1
N
120V
120V
120V
120V
L2
0V 0V
When the phase angle between L1 and L2 is 0°.
MLV 5KW
L1
N
Grid
connection Load
Output
L1
N
L2 L2
L1
L2
N
L1
N
120V
120V
120V
120V
L2
208V 208V
When the phase angle between L1 and L2 is 120°.
MLV 5KW
L1
N
Grid
connection Load
Output
L1
N
L2 L2
L1
L2
N
L1
N
120V
120V
120V
120V
L2
240V 240V
When the phase angle between L1 and L2 is 180°.
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
sure to connect PE protective conductor ( ) first.
→Ground (yellow-green)
L1→LINE (black)
L2→LINE (brown)
N→Neutral (blue)