Axpert MLV-5KW-48V User Manual

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User Manual

LV 5KVA-48V

INVERTER / CHARGER

Version: 1.0

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

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.

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

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

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.

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:

Ring terminal:

Model Typical

Amperage

Battery

Capacity

Wire Size Ring Terminal Torque

Cable

Dimensions

D (mm) L (mm)

Value

1*1/0AWG 60 8.4 49.7

5KW 220A 200AH

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.

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 f inal 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

When the phase angle between L1 and L2 is 0°.

Grid

connection

Grid

connection

120V

When the phase angle between L1 and L2 is 120°.

120V

208V

120V

When the phase angle between L1 and L2 is 180°.

MLV 5KW

L2 L2

MLV 5KW

L2 L2

120V

208V

Load

Output

Load

Output

Grid

connection

240V

120V

MLV 5KW

L2 L2

120V

240V

Load

Output

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)

WARNING:

Be sure that AC power source is disconnected before attempting to hardwire it to the unit.

4. Then, insert AC output wires according to polarities indicated on terminal block and fasten the terminal

screws. Be sure to connect PE protective conductor (

→ Ground (yellow-green) L1→ LINE (black) L2→ LINE (brown)

N→ Neutral (blue)

) first.

5. Make sure the wires are securely connected.

CAUTION: Important

Be sure to connect AC wires with correct polarity. If L and N wires are connected reversely, it may cause utility short-circuited when these inverters are worked in parallel operation.

CAUTION: Appliances such as air conditioner are required at least 2~3 minutes to restart because it’s required

to have enough time to balance refrigerant gas inside of circuits. If a power shortage occurs and recovers in a

short time, it will cause damage to your connected appliances. To prevent this kind of damage, please check with

the manufacturer of the air conditioner if it’s equipped with time-delay function before installation. Otherwise,

this inverter/charger will cause overload fault and cut off the output to protect your appliance but sometimes it

still causes internal damage to the air conditioner.

PV Connection

CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between inverter

and PV modules.

WARNING! All wiring must be performed by a qualified personnel. WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV

module connection. To reduce risk of injury, please use the recommended cable size as below.

NOTICE! When only one MPPT is used, please use MPPT1 first.

Model Typical Amperage Cable Size Torque

5KVA 80A 8 AWG 1.4~1.6 Nm

PV Module Selection:

When selecting proper PV modules, please be sure to consider the parameters below:

1. Open circuit Voltage (Voc) of PV modules can’t exceed the maximum voltage of the PV array open circuit of

the inverter.

2. Open circuit Voltage (Voc) of PV modules should be higher than the minimum voltage of the battery.

Solar Charging Mode Solar Charger Type MPPT Number of MPPT 2 Max. PV Array Open Circuit Voltage 145Vdc PV Array MPPT Voltage Range 60~115Vdc Min. battery voltage for PV charge 34Vdc

Please follow the steps below to implement PV module connection:

1. Remove insulation sleeve 10 mm from positive and negative conductors.

2. Check the correct polarity of connected cable from PV modules and PV input

connectors. Then, connect positive pole (+) of connection cable to positive pole (+) of PV input connector. Connect negative pole (-) of connection cable to negative pole (-) of PV input connector.

3. Make sure the wires are securely connected.

Final Assembly

After connecting all wirings, please put the bottom cover back by fixing two screws as shown below.

Communication Connection

Please use supplied communication cable to connect to inverter and PC. Insert bundled CD into a computer and

follow the on-screen instructions to install the monitoring software. For the detailed software operations,

please check user manual of software inside the CD.

Dry Contact Signal

There is one dry contact (3A/120VAC) available on the rear panel. It could be used to deliver signal to external

device when battery voltage reaches warning level.

Unit

Status

Power Off Unit is off and no output is powered. Close Open

Output is powered from Utility. Close Open

Output is

powered

from Battery

or Solar.

Power On

Program

01 set as

Utility

Program

01 is set

as SBU or

Solar first

Condition

Battery voltage < Low DC warning

voltage

Battery voltage > Setting value in

Program 13 or battery charging

reaches floating stage

Battery voltage < Setting value in

Program 12

Battery voltage > Setting value in

Program 13 or the battery

charging reaches the floating

stage

Dry contact port:

NC & C NO & C

Open Close

Open

Close Open

Parallel ID

1 2 3 4

OFF OFF OFF * 0

ON OFF OFF * 1

OFF ON OFF * 2

ON ON OFF * 3

OFF OFF ON * 4

ON OFF ON * 5

OFF ON ON * 6

ON ON ON * 7

* Not used

Parallel ID

OPERATION

Power ON/OFF

Once the unit has been properly installed and the batteries are connected well, simply press On/Off switch

(located on the right corner of the rear panel) to turn on the unit.

Operation and Display Panel

The operation and display panel, as shown in the chart below, are on the front panel of the inverter. It

includes three indicators, four function keys and an LCD display, indicating the operating status and

input/output power information.

LED Indicator

Green

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

Green

Red

Solid On Output is powered by utility in Line mode.

Flashing Output is powered by battery or PV in battery mode.

Solid On Battery is fully charged.

Flashing Battery is charging.

Solid On Fault occurs in the inverter.

Flashing

Warning occurs in the inverter.

Messages

LCD display

LED indicators

Function keys

LCD Display Icons

Icon Function description Input Source Information

Configuration Program and Fault Information

Indicates the AC input.

Indicates the PV input

Indicates the input 1, output 1.

Indicates the input 2, output 2.

Indicates input voltage, input frequency, PV voltage, battery voltage and

charger current.

Indicates the setting programs.

Indicates the warning and fault codes.

Warning:

Fault:

flashing with warning code.

lighting with fault code

Output Information

Indicate output voltage, output frequency, load percent, load in VA, load in

Watt and discharging current.

Battery Information

Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery

In AC mode, it will present battery charging status.

Status Battery voltage LCD Display

Constant

Current mode /

Constant

mode and charging status in line mode.

<2V/cell 4 bars will flash in turns.

2 ~ 2.083V/cell

2.083 ~ 2.167V/cell

Bottom bar will be on and the other three bars will flash in turns. Bottom two bars will be on and the other two bars will flash in turns.

Voltage mode

In floating mode, batteries are fully charged. 4 bars will be on.

> 2.167 V/cell

Bottom three bars will be on and the top

bar will flash.

In battery mode, it will present battery capacity.

Load Percentage Battery Voltage LCD Display

< 1.717V/cell

1.717V/cell ~ 1.8V/cell

Load >50%

1.8 ~ 1.883V/cell

50%> Load > 20%

Load < 20%

Load Information

> 1.883 V/cell

< 1.817V/cell

1.817V/cell ~ 1.9V/cell

1.9 ~ 1.983V/cell

> 1.983

< 1.867V/cell

1.867V/cell ~ 1.95V/cell

1.95 ~ 2.033V/cell

> 2.033

Indicates overload.

Indicates the load level by 0-24%, 25-50%, 50-74% and 75-100%.

0%~25% 25%~50% 50%~75% 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.

Indicates the PV charger circuit is working.

Mute Operation

Indicates the alarm is disabled.

LCD Setting

After pressing and holding the ENTER button for 3 seconds, the unit will enter setting mode. Press “UP” or

“DOWN” button to select setting programs. And then, press “ENTER” button to confirm the selection or ESC

button to exit.

Setting Programs:

Program Description Selectable option

Escape

00 Exit setting mode

Solar energy provides power to the

loads as first priority.

If solar energy is not sufficient to

power all connected loads, battery

energy will supply power to the loads

at the same time.

Utility provides power to the loads

only when any one condition stated

below happens:

- Solar energy is not available

- Battery voltage drops to either low

DC warning voltage or the setting

point in program 12.

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.

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 DC warning voltage or the

setting point in program 12.

30A

Output source priority:

To configure load power

source priority

Maximum charging current: To configure the total charging current for solar and utility chargers. (Max. charging current = utility charging current + solar charging current)

Solar first

Utility first (default)

SBU priority

20A

40A

50A

Maximum charging current: To configure the total charging current for solar and utility chargers. (Max. charging current = utility charging current + solar charging current)

60A

70A

80A 90A

100A 110A

120A

130A (only for 5KVA with MPPT

models)

140A

150A

160A

170A

03 AC input voltage range

05 Battery type

180A

200A

220A

190A

210A

Appliances (default)

If selected, acceptable AC input

voltage range will be within

90-280VAC.

UPS If selected, acceptable AC input

voltage range will be within

170-280VAC.

AGM (default)

Flooded

Automatically restart when overload occurs

Automatically restart when over temperature occurs

User-Defined

Restart disable

(default)

Restart disable

(default)

If “User-Defined” is selected, battery

charge voltage and low DC cut-off

voltage can be set up in program 26,

27 and 29.

Restart enable

08 Output voltage

09 Output frequency

Maximum utility charging current

110V

50Hz (default)

120V (default)

60Hz

10A

20A 30A (default)

40A 50A

60A

44.0V

45.0V (default)

Setting voltage point back to utility source when selecting “SBU priority” or “Solar first” in program 01.

46.0V

48.0V

50.0V

47.0V

49.0V

51.0V

Battery fully charged

Setting voltage point back to battery mode when selecting “SBU priority” or “Solar first” in program 01.

48.0V

50.0V

52.0V

54.0V

56.0V

49.0V

51.0V

53.0V

55.0V

57.0V

Charger source priority:

To configure the priority of

charger source

58.0V

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, only solar

energy can charge battery. Solar energy will charge battery if

it's available and sufficient.

18 Alarm control

Automatically return to default display screen

Alarm on (default)

Return to default

display screen

(default)

Stay at latest screen

Alarm off

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.

If selected, the display screen will stay

at the latest screen user finally

switches.

20 Backlight control

Beeps while primary source is interrupted

Overload bypass: When enabled, the unit

will transfer to line mode if overload occurs in battery mode.

25 Record Fault code

Bulk charging voltage (C.V voltage)

Backlight on (default)

Alarm on (default)

Backlight off

Alarm off

Bypass disable

(default)

Bypass enable

Record enable Record disable (default)

default setting: 56.4V

If self-defined is selected in program 5, this program can be set

up. Setting range is from 48.0V to 58.4V. Increment of each

click is 0.1V.

Default setting: 54.0V

Floating charging voltage

AC output mode *This setting is able to set

up only when the inverter is in standby mode. Be

If self-defined is selected in program 5, this program can be set

up. Setting range is from 48.0V to 58.4V. Increment of each

click is 0.1V.

parallel output(0°)

Phase 1 of 3 Phase output

sure that on/off switch is in “OFF” status.

Phase 2 of 3 Phase output

Phase 3 of 3 Phase output

29 Low DC cut-off voltage

PV judge condition

(Only apply for setting “Solar first” in program 1: Output source priority)

Parallel output (120°)

parallel output(180°)

Default setting: 42.0V

If self-defined is selected in program 5, this program can be set

up. Setting range is from 40.0V to 48.0V. 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.

One Inverter (Default):

For example, two units are connected in parallel and set “SOL” in output source priority. If one of the two units has connected to PV modules and PV input is normal, the parallel system will provide power to loads from solar or battery power. If both of them are not sufficient, the system will provide power to loads from utility. When “ALL” is selected, parallel or 3-phase system will continue working according to rule of “solar first” setting only when all of inverters are connected to PV modules. For example, two units are connected in parallel and set

All of Inverters:

“SOL” in output source priority. When “ALL” is selected in program 30, it’s necessary to have all inverters connected to PV modules and PV input is normal to allow the system to provide power to loads from solar and battery power. Otherwise, the system will provide power to loads from utility.

Solar power balance: When enabled, solar input power will be automatically adjusted according to the connected load power.

Solar power balance

enable (Default):

Solar power balance

disable:

Automatically (Default):

If selected, solar input power will be automatically adjusted according to the following formula: Max. input solar power = Max. battery charging power + Connected load power. If selected, the solar input power will be the same as max. battery charging power no matter how many loads are connected. The max. battery charging power will be based on the setting current in program 02. (Max. solar power = Max. battery charging power) If selected, inverter will judge this charging time automatically.

Bulk charging time

(C.V stage)

(Only available for

4KVA/5KVA model)

33 Battery equalization

Battery equalization voltage

Battery equalized time

5 min

The setting range is from 5 min to 900 min. Increment of each click is 5 min.

900 min

If “USE” is selected in program 05, this program can be set up. Battery equalization

Battery equalization disable (default)

If “Flooded” or “User-Defined” is selected in program 05, this program can be set up.

4KVA/5KVA default setting: 58.4V. Setting range is from 48V ~

58.4V. Increment of each click is 0.1V.

60min (default)

Setting range is from 5min to 900min.

Increment of each click is 5min.

Battery equalized timeout

Equalization interval

Equalization activated immediately

120min (default)

30days (default)

Enable

Setting range is from 5min to 900 min.

Increment of each click is 5 min.

Setting range is from 0 to 90 days.

Increment of each click is 1 day

Disable (default)

If equalization function is enabled in program 33, 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 “ equalization function until next activated equalization time

arrives based on program 37 setting. At this time, “ be shown in LCD main page.

”. If “Disable” is selected, it will cancel

” will not

Display Setting

The LCD display information will be switched in turns by pressing “UP” or “DOWN” key. The selectable

information is switched as below orde

Selectable information LCD display

AC Input 1 voltage/ AC output 1 voltage

(Default Display Screen)

AC Input 1 Voltage=230V, AC output 1 voltage=230V

AC Input 2 voltage/ AC output 2 voltage

AC Input 1 frequency/AC output 1 frequency

AC Input 2 Voltage=230V,AC output 2 voltage=230V

AC Input 1 frequency=50Hz,AC output 1 frequency=50Hz

AC Input 2 frequency=50Hz, AC output 2 frequency=50Hz

AC Input 2 frequency /AC output 2 frequency

MPPT Input 1 Charging current / MPPT Input

1 Charging power

MPPT Input 2 Charging current / MPPT Input

2 Charging power

PV1 voltage=60V , PV1 Power = 200W

PV2 voltage=60V ,PV2 Power = 200W

Load 1 Watt/ Load 1 percentage

Load 2 Watt/ Load 2 percentage

Load 1 Watt=200W, Load 1 percent=60%

Load 2 Watt=200W, Load 2 percent=60%

Load 1 Watt=200W, Load 1 in VA=600VA

Load 1 Watt/ Load 1 in VA

Load 2 Watt/ Load 2 in VA

Load 2 Watt 200W, Load 2 in VA=600VA

DC charging current / Battery voltage

Battery voltage/ DC discharging current

Charging current=25A, Battery voltage=56.0V

Battery voltage=53.0V, discharging current=1A

Main CPU version 00014.04

Main CPU version checking

Secondary CPU version: 00003.03

Secondary CPU version checking

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.

Fault mode

Note:

*Fault mode: Errors are

caused by internal circuit

errors or external reasons

such as over temperature,

output short circuited and so

on.

No output is supplied by the

unit but it still can charge

the batteries.

PV energy can charge the

batteries.

Charging by utility.

Charging by PV energy.

Charging by PV energy and utility

No charging.

Charging by PV energy.

No charging.

Charging by PV energy

Charging by utility.

The unit will provide output

Line Mode

power from the mains. It

will also charge the battery

in line mode.

Charging by PV energy and utility

Battery Mode The unit will provide output Power from battery and PV energy.

power from battery and PV

power.

Power from battery only.

Fault Reference Code

Fault Code Fault Event Icon on

01 Fan is locked when inverter is off.

02 Over temperature

03 Battery voltage is too high

04 Battery voltage is too low

06 Output voltage is too high.

07 Overload time out

08 Bus voltage is too high

09 Bus soft start failed

11 Main relay failed

51 Over current or surge

52 Bus voltage is too low

Output short circuited or over temperature is detected by internal converter components.

53 Inverter soft start failed

55 Over DC voltage in AC output

56 Battery connection is open

57 Current sensor failed

58 Output voltage is too low

87 Internal host and slave mismatching

88 Parallel ID missing

89 Parallel ID clash

91 Working mode synchronization loss

Warning Indicator

Warning

Code

Warning Event Audible Alarm Icon flashing

Fan is locked when inverter is on.

Beep three times every second

03 Battery is over-charged Beep once every second

04 Low battery Beep once every second

07 Overload Beep once every 0.5 second

10 Output power derating Beep twice every 3 seconds

Solar charger stops due

to low battery.

Solar charger stops due

to high PV voltage.

Solar charger stops due

to overload.

LCD connects to slave

units

SPECIFICATIONS

Table 1: Line Mode Specifications

INVERTER MODEL 5KVA Input Voltage Waveform Sinusoidal (utility or generator) Nominal Input Voltage

Low Loss Voltage

Low Loss Return Voltage

High Loss Voltage 140Vac±7V High Loss Return Voltage 135Vac±7V Max AC Input Voltage 150Vac

Nominal Input Frequency 50Hz / 60Hz (Auto-detection) Low Loss Frequency 40±1Hz Low Loss Return Frequency 42±1Hz High Loss Frequency 65±1Hz High Loss Return Frequency 63±1Hz

Output Short Circuit Protection

110/120Vac(L-N or L1-N-L2)

95Vac±7V (UPS)

65Vac±7V (Appliances)

100Vac±7V (UPS);

70Vac±7V (Appliances)

Line mode: Circuit Breaker

Battery mode: Electronic Circuits

Max bypass current 40A Efficiency (Line Mode) >95% ( Rated R load, battery full charged )

Transfer Time (P1-N-P2)

Transfer Time (P-N)

Output power derating:

When AC input voltage drops to 95V, the output power will be derated.

10ms typical, 12ms maximum @50Hz (UPS);

20ms typical, 25ms maximum @50Hz (Appliances)

30ms @50Hz

120Vac model:

Table 2: Inverter Mode Specifications

INVERTER MODEL 5KVA Rated Output Power Output Voltage Waveform

Output Voltage Regulation Output Frequency

Peak Efficiency

110/120Vac(L-N or L1-N-L2)

5KVA/5KW

Pure Sine Wave

60Hz or 50Hz

90%

Overload Protection 5s@≥150% load; 10s@110%~150% load Surge Capacity

2* rated power for 5 seconds

Nominal DC Input Voltage 48Vdc Cold Start Voltage 46.0Vdc

Low DC Warning Voltage

@ load < 20%

@ 20% ≤ load < 50%

@ load ≥ 50%

Low DC Warning Return Voltage

@ load < 20%

44.0Vdc

42.8Vdc

40.4Vdc

46.0Vdc

@ 20% ≤ load < 50%

@ load ≥ 50%

44.8Vdc

42.4Vdc

Low DC Cut-off Voltage

@ load < 20%

@ 20% ≤ load < 50%

@ load ≥ 50%

42.0Vdc

40.8Vdc

38.4Vdc

High DC Recovery Voltage 58Vdc High DC Cut-off Voltage

60Vdc

No Load Power Consumption <100W

Table 3: Charging Mode Specifications

Utility Charging Mode INVERTER MODEL 5KVA Charging Current (UPS)

@ Nominal Input Voltage Bulk

Charging Voltage

Flooded Battery 58.4Vdc AGM / Gel

Battery

2A/10A/20A/30A/40A/50A/60A

56.4Vdc

Floating Charging Voltage 54Vdc Overcharge Protection 60Vdc Charging Algorithm 3-Step

Charging Curve

Solar Charging Mode(Per number of MPPT)

INVERTER MODEL

5KVA Rated Power 4000*2 W Max. efficiency 96% Max. PV Array Open Voltage 145Vdc PV Array MPPT Voltage

Range Min. battery voltage for PV charge

60~115Vdc

34Vdc

Standby Power Consumption <23W Battery Voltage Accuracy +/-0.3% PV Voltage Accuracy +/-2V Charging Algorithm 3-Step Joint Utility and Solar Charging INVERTER MODEL 5KVA Max. Charging Current Default Charging Current

220A

60Amp

Table 4 General Specifications

INVERTER MODEL 5KVA

Safety Certification CE

Operating Temperature Range

0°C to 55°C

Storage temperature -15°C~ 60°C Dimension (D*W*H), mm

Net Weight, kg

130 x 622.6 x 610

TROUBLESHOOTING

Problem LCD/LED/Buzzer Explanation / Possible cause What to do

Unit shuts down automatically during startup process.

No response after power on.

Mains exist but the unit works in battery mode.

When the unit is turned on, internal relay is switched on and off repeatedly.

Buzzer beeps continuously and red LED is on.

LCD/LEDs and buzzer will be active for 3 seconds and then completely off.

No indication.

Input voltage is displayed as 0 on the LCD and green LED is flashing.

Green LED is flashing.

LCD display and LEDs are flashing

Fault code 07

Fault code 05

Fault code 02

Fault code 03

Fault code 01 Fan fault Replace the fan.

Fault code 06/58

Fault code 08/09/53/57

Fault code 51 Over current or surge.

Fault code 52 Bus voltage is too low.

Fault code 55 Output voltage is unbalanced.

Fault code 56

The battery voltage is too low

(<1.91V/Cell)

1. The battery voltage is far too low. (<1.4V/Cell)

2. Battery polarity is connected reversely.

Input protector is tripped

Insufficient quality of AC power. (Shore or Generator)

Set “Solar First” as the priority of output source.

Battery is disconnected.

Overload error. The inverter is overload by 110% and time is up.

Output short circuited.

The temperature of internal converter is over 120°C. (Only available for 1-5KVA models.) The internal temperature of the inverter is over 100°C.

Battery is over-charged. Return to repair center.

The battery voltage is too high.

Output abnormal (Inverter voltage is lower than 190Vac or is higher than 260Vac)

Internal components failed. Return it to repair center.

Battery is not connected well or fuse is burnt.

1. Re-charge the battery.

2. Replace the battery.

1. Check if batteries and the wiring are connected well.

2. Re-charge the battery.

3. Replace the battery.

Check if AC breaker is tripped and AC wiring is connected well.

1. Check if AC wires are too thin and/or too long.

2. Check if generator (if applied) is working well or if the setting range of input voltage is correct. (UPSAppliance) Change output source priority to Utility first.

Check if battery wires are connected well.

Reduce the connected load by switching off some equipment. Check if wiring is connected well and remove abnormal load.

Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

Check if spec and quantity of the batteries meet the requirements.

1. Reduce the connected load.

2. Return it to repair center

Restart the unit, if the error happens again, please return it to repair center.

If the battery is connected well, please return it to repair center.

Appendix I: Approximate Back-up Time Table

Model Load (VA) Backup Time @48Vdc 200Ah (min) Backup Time @48Vdc 400Ah (min)

500 1226 2576

1000 536 1226

1500 316 804

2000 222 542

5KVA

Note: Backup time depends on the quality of the battery, age of battery and type of battery.

Specifications of batteries may vary depending on different manufacturers.

2500 180 430

3000 152 364

3500 130 282

4000 100 224

4500 88 200

5000 80 180

Appendix II: Parallel function

1. Introduction

This inverter can be used in parallel with three different operation modes.

1. Parallel operation in single phase with up to three units. The supported maximum output power is 15KW/15KVA.

2. Maximum three units work together to support three-phase equipment. The supported maximum output power is 15KW/15KVA.

3. Maximum three units work together to support two-phase equipment. One units support two phase. The supported maximum output power is 15KW/15KVA and one phase can be up to 7.5KW/7.5KVA.

WARNING! The AC input N wires must be connected together; the AC output N wires must be connected

together.

2. Package Contents

In parallel kit, you will find the following items in the package:

Parallel communication cable Current sharing cable

3. Mounting the Unit

When installing multiple units, please follow the illustration below.

NOTE: For proper air circulation to dissipate heat, allow a clearance of approx. 20 cm to the side and approx.

50 cm above and below the unit. Be sure to install each unit in the same height.

4. Wiring Connection

The size of the cable for each inverter is shown as below:

WARNING: Be sure the length of all battery cables is the same. Otherwise, there will be voltage difference

between inverter and battery which might cause mal-function of the parallel inverters.

Recommended battery cable and terminal size for each inverter:

Model Wire Size Torque value

5KVA 2*4AWG 5~ 6 Nm

Recommended cable size of AC input and output for each inverter:

Model AWG no. Torque

5KVA 10 AWG 1.4~1.6Nm

You need to connect the cables of each inverter together. Take the battery cables for example: You need to use

a connector or bus-bar as a joint to connect the battery cables together, and then connect it to the battery

terminal. The size of the cable used from joint to battery should be X times cable size in the tables above. “X”

indicates the number of inverters connected in parallel.

Regarding AC input and output, please also follow the same principle.

CAUTION!! Please install the breaker at the battery and AC input side. This will ensure the inverter can be

securely disconnected during maintenance and fully protected from over current of battery or AC input. The

recommended mounted location of the breakers is shown in the parallel diagrams in section 5-1 and 5-2.

Recommended specification of battery breaker for each inverter:

Model 1 unit*

5KVA 125A/80VDC

*If you want to use only one breaker at the battery side for the whole system, the rating of the breaker should

be X times current of 1 unit. “X” indicates the number of inverters connected in parallel.

Recommended specification of AC input breaker in single phase:

Model

2 units 3 units

5KVA 80A/230VAC 120A/230VAC

Note 1: You also can use only one 40A breaker for each inverter at its AC input. Note 2: Regarding three-phase system, you can use 3-pole breaker directly and the rating of the breaker

should be compatible with the phase current limitation from the phase with maximum units.

Recommended battery capacity

Inverter parallel numbers 2 3

Battery Capacity 400AH 600AH

WARNING! Be sure that all inverters will share the same battery bank. Otherwise, the inverters will be

transferred to fault mode.

4-1. Parallel Operation in Single phase

❶

❷

Two inverters in parallel(0°):

Power Connection

L1 L2 L1 L2

Load

Communication Connection

Three inverters in parallel(0°):

Power Connection

Communication Connection

4-2. Support 2-phase equipment

Two inverters in parallel (120°):

Power Connection

L1 L2

Load

Communication Connection

Two inverters in parallel (180°):

Power Connection

L1 L2

Load

Communication Connection

Three inverters in parallel (120°):

Power Connection

L1 L2

Load

Communication Connection

Three inverters in parallel (180°):

Power Connection

L1 L2

Load

Communication Connection

4-3. Support 3-phase equipment

One inverter in each phase:

Power Connection

Communication Connection

WARNING: Do NOT connect the current sharing cables between the inverters in different phases. Otherwise,

it may damage the inverters.

NOTE:

For parallel model operation, please refer to LCD program 28

5. PV Connection

Please refer to the user manual of single unit for PV Connection.

CAUTION: Each inverter should connect to PV modules separately.

6. LCD Setting and Display

Setting Program:

Program Description Selectable option

parallel output(0°)

AC output mode *This setting is only available when the inverter is in standby mode (Switch off).

Phase 1 of 3 Phase output

Phase 2 of 3 Phase output

Phase 3 of 3 Phase output

Parallel output (120°)

parallel output(180°)

When the units are used in parallel with single phase, please select “2A0”、

“2A1”and “2A3” in program 28.

It is required to have at least 3 inverters or maximum 6 inverters to support three-phase equipment. It’s required to have at least one inverter in each phase or it’s up to four inverters in one phase. Please refers to 5-2 for detailed information. Please select “3P1” in program 28 for the inverters connected to L1 phase, “3P2” in program 28 for the inverters connected to L2 phase and “3P3” in program 28 for the inverters connected to L3 phase.

Be sure to connect shared current cables to units in the same phase. Do NOT connect shared current cables between units in different phases.

PV judge condition (Only apply for setting “Solar first” in program 1: Output source priority)

One Inverter (Default):

When “ONE” is selected, as long as one of the inverters has been connected to PV modules and PV input is normal, parallel or 3-phase system will continue working according to rule of “solar first” setting. For example, two units are connected in parallel and set “SOL” in output source priority. If one of the two units has connected to PV modules and PV input is normal, the parallel system will provide power to loads from solar or battery power. If both of them are not sufficient, the system will provide power to loads from utility.

When “ALL” is selected, parallel or 3-phase system will continue working according to rule of “solar first” setting only when all of inverters are connected to PV modules.

All of Inverters:

For example, two units are connected in parallel and set “SOL” in output source priority. When “ALL” is selected in program 30, it’s necessary to have all inverters connected to PV modules and PV input is normal to allow the system to provide power to loads from solar and battery power. Otherwise, the system will provide power to loads from utility.

Fault code:

Fault Code Fault Event Icon on

60 Power feedback protection

71 Firmware version inconsistent

72 Current sharing fault

80 CAN fault

81 Host loss

82 Synchronization loss

83 Battery voltage detected different

84 Different AC input voltage and frequency detected

85 AC output current unbalance

86 AC output mode setting is different

7. Commissioning

Parallel in single phase

Step 1: Check the following requirements before installation:

 Correct wire connection  Ensure all breakers in Line wires at load side are open and each Neutral wires of each unit is connected

together. Step 2: Turn on all of the units and configure LCD program 28 as 2A0 or 2A1 or 2A2. And then shut down all units.

NOET: It’s necessary to turn off switch when setting LCD program. Otherwise, the setting cannot be

programmed. All the units must use same selection. Step 3: Turn on each unit.

LCD display of “2A0” selection LCD display of “2A1” selection LCD display of “2A2” selection

Step 4: Switch on all AC breakers of Line wires in AC input. It’s better to connect all of the inverters to the utility at the same time. If not, it will display fault 82 in the following inverters. However, these inverters will automatically restart. If detecting AC connection, they will work normally.

LCD display of “2A0” selection LCD display of “2A1” selection LCD display of “2A2” selection

Step 5: If there is no more fault alarm, the parallel system is completely installed. Step 6: Please switch on all breakers of Line wires in load side. This system will start to provide power to the load.

Support three-phase equipment

Step 1: Check the following requirements before installation:

 Correct wire connection  Ensure all breakers in Line wires at load side are open and each Neutral wires of each unit is connected

together. Step 2: Turn on all of the units and configure LCD program 28 as 3P1, 3P2 and 3P3 sequentially. And then shut down all units.

NOET: It’s necessary to turn off switch when setting LCD program. Otherwise, the setting cannot be

programmed. Step 3: Turn on all units sequentially.

LCD display in L1-phase unit LCD display in L2-phase unit LCD display in L3-phase unit

Step 4: Switch on all AC breakers of Line wires in AC input. If AC connection is detected and three phases are matched with unit setting, they will work normally. Otherwise, the AC icon

will flash and they will not work in line mode. Under this circumstance, you can switch wires of AC inputs from L2 phase and L3 phase. Or you may exchange the LCD program 28 of P2 and P3 to solve this problem.

LCD display in L1-phase unit LCD display in L2-phase unit LCD display in L3-phase unit

Step 5: If there is no more fault alarm, the system to support 3-phase equipment is completely installed. Step 6: Please switch on all breakers of Line wires in load side. This system will start to provide power to the load.

Note 1: To avoid overload occurring, before turning on breakers at load side, it’s better to have the whole

system in operation first.

Note 2: There is some transfer time for this operation. Power interruption may happen to critical devices,

which cannot tolerate transfer time.

8. Troubleshooting

If the device fails to function as expected, check the list of common faults below before consulting the service center.

Situation Fault Code

80 CAN data loss 81 Host data loss

Fault Event Description

Current feedback into the inverter is detected.

The firmware version of each inverter is not the same.

The output current of each inverter is different.

Synchronization data loss

The battery voltage of each inverter is not the same.

AC input voltage and frequency are detected different.

AC output current unbalance

AC output mode setting is different.

1. Restart the inverter.

2. Check if L/N cables are not connected reversely in all inverters.

3. For parallel system in single phase, make sure the current sharing cables

are connected to all inverters. For supporting three-phase system, make sure the current sharing cables are connected to the inverters in the same phase, and disconnected to the inverters in different phases.

4. If the problem remains, please contact your installer.

1. Update the firmware of all inverter to the same version.

2. Check the version of each inverter via LCD setting and make sure the

CPU versions are the same. If not, please contact your installer to provide the latest firmware to update.

3. After updating, if the problem still remains, please contact your installer.

1. Check if shared cables are connected well and restart the inverter.

2. If the problem remains, please contact your installer.

1. Check if communication cables are connected well and restart the

inverter.

2. If the problem remains, please contact your installer.

1. Make sure all inverters share the same groups of batteries together.

2. Remove all loads and disconnect AC input and PV input. Then, check

battery voltage of all inverters. If the values from all inverters are close, please check if all battery cables are in the same length and in the same material type. Otherwise, please contact your installer to provide SOP to calibrate battery voltage of each inverter.

3. If the problem still remains, please contact your installer.

1. Check the utility wiring conncetion and restart the inverter.

2. Make sure utility starts up at same time. If there are breakers installed

between utility and inverters, please be sure all AC input breakers can be turned on at same time.

3. If the problem remains, please contact your installer.

1. Restart the inverter.

2. Remove some excessive loads and re-check the load information from

LCD of the inverters. If the values are different, please check if AC input and output cables are in the same length and in the same material type.

3. If the problem remains, please contact your installer.

1. Switch off the inverter and check LCD setting #28.

2. For parallel system in single phase, make sure no 3P1, 3P2 or 3P3 is set

on #28.

For supporting three-phase system, make sure no “PAL” is set on #28.

3. If the problem remains, please contact your installer.

Solution

Axpert MLV-5KW-48V User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual