invt XN5548-P Off Grid Inverter User Manual

invt XN5548-P Off Grid Inverter

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 ( !piece of 200A, 32VDC for 3.SKW, !piece of 200A, 58VDC for 5.SKW) 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.

INTRODUCTION

This is a multi-function inverter/charger, combining functions of inverter, MPPT solar charger and battery charger to offer uninterruptible power support with portable size. Its comprehensive LCD display offers user-configurable and easy-accessible button operation such as battery charging current, AC/solar charger priority, and acceptable input voltage based on different applications.

Features

• Pu re sine wave output
• Output power factor 1.0
• Programmable supply priority for PV ,battery or Grid
• User-adjustable charge current and voltage
• Wide PV input range (120Vdc -500Vdc),110A MPPT sec
• Working without batteries in sunny day
• WiFi Monitoring Function (optional)
• Anti-dusk kit for harsh environment(optional)
• LCD remote control with 10 meters wire(optional)
• PV and electricity complementary
• Use with lithium batteries

Basic System Architecture
The following illustration shows basic application for this inverter/charger.

It also includes following devices to have a complete running system

• Generator or Utility.
• PV modules (option)

Consult with your system integrator for other possible system architectures depending on your requirements.

This inverter can power all kinds of appliances in home or office environment, including motor-type appliances such as tube light, fan, refrigerator and air conditioner.

Product Overview

1. LCD display
2. Status indicator
3. Charging indicator
4. Fault indicator
5. Function buttons
6. Power on/off switch
7. AC input
8. AC output
9. PV input
10. Battery input
11. Circuit breaker
12. RS485/RS232 communication port
13. PARALLEL CONNECTION

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

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 two screws.

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

mm 2

| Dimensions
D(mm)| L (mm)
5.5 KW 48V| 115A| * 200AH| 14AWG| 22| 6.4| 33.2| ** 2~ 3 Nm
2*8AWG| 14| 6.4| 29.2

Please follow below steps to implement battery connection

1. Assemble battery ring terminal based on recommended battery cable and terminal size.

2. Connect all battery packs as units requires.
   NOTE : Please only use sealed lead acid battery or sealed GEL/AGM lead- acid battery.

3. 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 (-).

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 for 32A for 3.SKW ,S0A for 5.SKW.
• 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

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)
   • N–>Neutral (blue)

5. Make sure the wires are securely connected.

   • CAUTION : Important
     Be sure to connect AC wires with correct polarity. If L and N wires are connected reversely, it may cause utility short-circuited when these inverters are 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.

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.

PV Module Selection
When selecting proper PV modules, please be sure to consider below parameters

1. Open circuit Voltage (Voe) of PV modules not exceeds max. PV array open circuit voltage of inverter.
2. Open circuit Voltage (Voe) of PV modules should be higher than min. battery voltage.

Take 250Wp PV module as an example. After considering above two parameters, the recommended module co n f Ioura t’ ions are r Is t e d as b I eow tabl e.

Solar Panel Spec.

(reference)

•  2S0Wp
• Vmp: 30.lVdc
• Imp: 8.3A
• Voe: 37.7Vdc
• Isc: 8.4A
• Cells: 60

| SOLAR INPUT| Q’ty of panels| Total input

power

---|---|---|---
(Min in serial: 6 pcs, max. in serial: 13 pcs)
6 pcs in serial| 6 pcs| lS00W
8 pcs in serial| 8 pcs| 2000W
12 pcs in serial| 12 pcs| 3000W
13 pcs in serial| 13 pcs| 32S0W
8 pieces in serial and 2 sets in parallel| 16 pcs| 4000W
10 pieces in serial and 2 sets in parallel| 20 pcs| sooow

Please follow below steps to implement PV module connection

1. Remove insulation sleeve 10 mm for positive and negative conductors.
2. Check correct polarity of connection cable from PV modules and PV input connectors. Then, connect positive pole (+)of connection cable to positive pole ( +) of PV input connector. Connect negative pole (-) of connection cable to negative pole (-) of PV input connector.
3. Make sure the wires are securely connected.

Final Assembly
After connecting all wirings, please put bottom cover back by screwing two screws as shown below.

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

Flashing  Battery is charging.
****| Red| Solid On  Fault occurs in the inverter.
Flashing     Warning condition occurs in the inverter.

Function Keys

LCD Display Icons

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.

Setting Programs

00| Exit setting mode| Escape

---|---|---

**** 01

| Output source priority: To configure load power source priority| ****| Solar energy provides power to the loads as frist priority.

If solar energy is out 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 12.

| | lOA| 20A
| | |
| | 30A| 40A
| | |
02| **** Maximum charging current To configure total charging current for solar and utility chargers.

(Max. charging current = utility charging current+ solar charging current)

| S0A| 60A

70A

| BOA
90A

go

| 100A
| |
| | 110A|
| |

Display Setting
The LCD display information will be switched in turns by pressing “UP” or “DOWN” key. The selectable information is switched as below order: input voltage, input frequency, PV voltage, MPPT charging current, MPPT charging power, battery voltage, output voltage, output frequency, load percentage, load in VA, load in Watt, DC discharging current, main CPU Version and second CPU Version.

Selectable information LCD display

Input voltage/Output voltage (Default Display Screen)| Input Voltage=230V, output voltage=230V

---|---

Input frequency

| Input frequency=S0Hz

PV voltage

| PV voltage=360V

MPPT Charging current| Current     10A

Current < 10A

MPPT Charging power| MPPT charging power=S00W

---|---

Battery voltage/ DC discharging current

| Battery voltage=25.5V, discharging current=lA

Output frequency

| Output frequency=S0Hz

Load percentage| Load percent=70%

Load in VA| When connected load is lower than lkVA, load in VA will present xxxVA like below chart.

When load is larger than lkVA, load in VA will present x.xkVA like below chart.

Load in Watt| When load is lower than lkW, load in W will present xxxW like below chart.

When load is larger than lkW, load in W will present x.xkW like below chart.

---|---
Main CPU version checking| Main CPU version 00014.04

Operating Mode Description

**** Standby mode/ Power saving mode

Note

• *Standby mode : The inverter is not turned on yet but at this time, the inverter can charge battery without AC output.
• *Power saving mode: If enabled, the output of inverter will be off when connected load is pretty low or not detected.

| **** No output is supplied by the unit but it still can charge batteries.| Charging by utility and PV energy.

Charging by utility.

Charging by PV energy.

No charging.

**** Fault mode Note

• *Fault mode: Errors are caused by inside circuit error or external reasons such as over temperature, output short circuited and so on.

| **** PV energy and utility can charge batteries.| Charging by utility and PV energy.

---|---|---
Charging by utility.

Charging by PV energy.

No charging.

**** Line Mode| **** The unit will provide output power from the mains. It will also charge the battery at line mode.| Charging by utility and PV energy.

**** The unit will provide output power from the mains. It will also charge the battery at line mode.| Charging by utility.

If “SUB ” is selected as output source

priority and solar energy is not sufficient to provide the load, solar energy and the utility will provide the loads and charge the battery at the same time.

If ” SUB ” is selected as output source

priority and battery is not connected, solar energy and the utility will provide the loads.

Power from utility.

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

---|---|---
PV energy will supply power to the loads and charge battery at the same time.

Power from battery only.

Power from PV energy only.

Battery Equallzatlon Description
Equalization function is added into charge controller. It reverses the buildup of negative chemical effects like stratification, a condition where acid concentration is greater at the bottom of the battery than at the top. Equalization also helps to remove sulfate crystals that might have built up on the plates. If left unchecked, this condition, called sulfation, will reduce the overall capacity of the battery. Therefore, it’s recommended to equalize battery periodically.

How to Apply Equalization Function
You must enable battery equalization function in monitoring LCD setting program 33 first.

Then, you may apply this function in device by either one of following methods

1. Setting equalization interval in program 34.
2. Active equalization immediately in program 39.

When to Equalize
In float stage, when the setting equalization interval (battery equalization cycle) is arrived, or equalization is active immediately, the controller will start to enter Equalize stage.

Equalize charging time and timeout
In Equalize stage, the controller will supply power to charge battery as much as possible until battery voltage raises to battery equalization voltage. Then, constant-voltage regulation is applied to maintain battery voltage at the battery equalization voltage. The battery will remain in the Equalize stage until setting battery equalized time is arrived.

However, in Equalize stage, when battery equalized time is expired and battery voltage doesn’t rise to battery equalization voltage point, the charge controller will extend the battery equalized time until battery voltage achieves battery equalization voltage. If battery voltage is still lower than battery equalization voltage when battery equalized timeout setting is over, the charge controller will stop equalization and return to float stage.

Fault Reference Code

Warning Indicator

SPECIFICATIONS

Table 1 Line Mode Specifications

90Vac± 7V (Appliances)

Low Loss Return Voltage| 180Vac±7V (UPS);

l00Vac± 7V (Appliances)

High Loss Voltage| 280Vac±7V
High Loss Return Voltage| 270Vac±7V
Max AC Input Voltage| 300Vac
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|

• Line mode : Circuit Breaker
• Battery mode: Electronic Circuits

Efficiency (Line Mode)| >95% ( Rated R load, battery full charged )
Transfer Time| lOms typical (UPS); 20ms typical (Appliances)
Output power derating

When AC input voltage drops to 95V or 170V depending on models, the output power will be derated.

| 230Vac model

Table 2 Inverter Mode Specifications

Low DC Warning Voltage

@load< 20%

| 44.0Vdc
@ 20% :-; load < SO%| 42.8Vdc
@load<! SO%| 40.4Vdc
Low DC Warning Return Voltage|
@load< 20%| 46.0Vdc
@ 20% :-; load < SO%| 44.8Vdc
@load<! SO%| 42.4Vdc
Low DC Cut-off Voltage

@load< 20%

| 42.0Vdc
@ 20% :-; load < SO%| 40.8Vdc
@load<! SO%| 38.4Vdc
High DC Recovery Voltage| S8Vdc
High DC Cut-off Voltage| 62Vdc
No Load Power Consumption| <SOW
Saving Mode Power Consumption| <lSW

Table 3 Charge Mode Specifications

I| Utility Charging Mode|
---|---|---
INVERTER MODEL| 5.SKW48V
Charging Current (UPS)

@ Nominal Input Voltage

| 80A
Bulk Charging Voltage| Flooded

Battery

| 58.4
AGM / Gel

Battery

| 56.4
Floating Charging Voltage| 54Vdc
Charging Algorithm| 3-Step
Charging Curve| Battery Voltage, per cell Charging Current,%

I| Solar Charging Mode|
---|---|---
INVERTER MODEL| 5.SKW48V
Rated Power| 6000W
PV Charge Current| 110A
Efficiency| 98.0% max.
Max. PV Array Open Circuit Voltage| 500Vdc
PV Array MPPT Voltage Range| 120-450Vdc
Min battery voltage for PV charge
Standby Power Consumption| 2W
Battery Voltage Accuracy| +/-0.3%
PV Voltage Accuracy| +/-2V
Charging Algorithm| 3-Step

Table 4 General Specifications

Operating Temperature

Range

| 0°( to 55°(
Storage temperature| -15°(~ 60°(
Dimension (DWH) , mm| 472297133
Net Weight, kg| 10.5

TROUBLE SHOOTING

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

Unit shuts down automatically during startup process.| LCD/LEDs and buzzer will be active for 3 seconds and then complete off.| The battery voltage is too low (<1.91V/Cell)|

1. Re-charge battery.
2. Replace battery.

---|---|---|---
No response after power on.| No indication.|

1. The battery voltage is far too low. ( <1.4V/Cell)
2. Battery polarity is connected reversed.

|

1. Check if batteries and the wiring are connected well.
2. Re-charge battery.
3. Replace battery.

Mains exist but the unit works in battery mode.| Input voltage is displayed as O on the

LCD and green LED is flashing.

| In put protector is tripped| Check if AC breaker is tripped and AC wiring is connected well.
Green LED is flashing.| Insufficient quality of AC power. (Shore or Generator)|

1. Check if AC wires are too thin and/or too long.
2. Check if generator ( if applied) is working well or if input voltage range setting is correct. (UPS Appliance)

When the unit is turned on, internal relay is switched on

and off repeatedly.

| nd

f : : a     LEDs

| Battery is disconnected.| Check if battery wires are connected well.
---|---|---|---
Buzzer beeps continuously and red LED is on.| Fault code 07| Overload error. The inverter is overload 110% and time is up.| Reduce the connected load by switching off some equipment.
Fault code 05| Output short circuited.| Check if wiring is connected well and remove abnormal load.
Temperature of internal converter component is over 120°C.| Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.
Fault code 02| Internal temperature of inverter

component is over 100°C.

Fault code 03| Battery is over-charged.| Return to repair center.
The battery voltage is too high.| Check if spec and quantity of batteries are meet requirements.
Fault code 01| Fan fault| Replace the fan.
Fault code 06/58| Output abnormal (Inverter voltage below than 190Vac or is higher than 260Vac)|

1. Reduce the connected load.
2. Return to repair center

Fault code 08/09/53/57| Internal components failed.| Return to repair center.
Fault code 51| Over current or surge.| Restart the unit, if the error happens again, please return to repair center.
Fault code 52| Bus voltage is too low.
Fault code 55| Output voltage is unbalanced.
Fault code 56| Battery is not connected well or fuse is burnt.| If the battery is connected well, please return to repair center.

Appendix: Approximate Back-up Time Table

Model| Load (W)| Backup Time @ 24Vdc lO0Ah (min)| Backup Time @ 24Vdc 200Ah (min)
---|---|---|---
3.5KW| 300| 449| 1100
600| 222| 525
900| 124| 303
1200| 95| 227
1500| 68| 164
1800| 56| 126
2100| 48| 108
2400| 35| 94
2700| 31| 74
3200| 28| 67
Model| Load (W)| Backup Time @ 48Vdc lO0Ah (min)| Backup Time @ 48Vdc 200Ah (min)
---|---|---|---
5.5KW| 500| 613| 1288
1000| 268| 613
1500| 158| 402
2000| 111| 271
2500| 90| 215
3200| 76| 182
3500| 65| 141
4000| 50| 112
4500| 44| 100
5000| 40| 90

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.

Product technical specifications are subject to change without notice.

Parallel Installation Guide

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

1. Parallel operation in single phase with up to 6 units. The supported maximum output power is 30KW/30KVA.
2. Maximum six units work together to support three-phase equipment. Four units support one phase maximum. The supported maximum output power is 30KW/30KVA and one phase can be up to 20KW/20KVA.
   • NOTE : If this unit is bundled with share current cable and parallel cable, this inverter is default supported parallel operation. You may skip section
3. If not, please purchase parallel kit and install this unit by following instruction from professional technical personnel in local dealer.

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

Parallel board installation
This installation steps are only applied to SK models.

• Step 1 : Remove wire cover by unscrewing all screws.
• Step 2 : Remove communication board by unscrewing two screws as below chart.
• Step 3 : Remove two screws as below chart and remove 2-pin and 14-pin cables. Take out the board under the communication board.
• Step 4 : Remove two screws as below chart to take out cover of parallel communication.
• Step 5 : Install new parallel board with 2 screws tightly.
• Step 6 : Re-connect 2-pin and 14-pin to original position.
• Step 7 : Put communication board back to the unit.
• Step 8 : Put wire cover back to the unit. Now the inverter is providing parallel operation function.

Mounting the Unit
When installing multiple units, please follow below chart.

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 level.

Wiring Connection
The cable size of each inverter is shown as below

Recommended battery cable and terminal size for each inverter

(mm) I L <mm)
SKVA| 14AWG| 22| 6.4          133.2| 2~ 3 Nm
28AWG| 14| 6.4| 29.2

WARNING: Be sure the length of all battery cables is the same. Otherwise, there will be voltage difference between inverter and battery to cause parallel inverters not working.

Recommended AC input and outout cable size for each inverter

• 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 to the battery terminal. I he cable size 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 mounded location of lye breakers is shown in the figures in 5-1 and 5-2.

Recommended breaker specification of battery for each inverter *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 breaker specification of AC input with single phHe

• Notel : Also, you can use 40A breaker (S0A for SKVA) for only l unit, and each inverter has a breaker at its AC input.
• Note2 : Regarding three phase system, you can use 4 poles breaker, the rating is up to I.he current of the phase which has the maximum units. Or you can follow the suggestion of note 1.

Recommended battery capacity

WARNING! Be sure that all inverters will share the same battery bank. Otherwise, the inverters will transfer to fault mode.

Parallel Operation in Single phase Two inverters in parallel

Power Connection

Communication Connection

Three inverters in parallel
Power Connection

Communication Connection

Four inverters in parallel
Power Connection

Communication Connection

Five inverters in parallel
Power Connection

Communication Connection

Six inverters in parallel
Power Connection

Communication Connection

Support 3-phase equipment Two inverters in each phase

Power Connection

Communication Connection

Four inverters in one phase and one inverter for the other two phases
Power Connection

Note: It’s up to customer’s demand to pick 4 inverters on any phase.

• Pl: Ll-phase,
• P2: L2-phase,
• P3: L3-phase.

Communication Connection

Three inverters in one phase, two inverters in second phase and one inverter for the third phase

Power Connection

Communication Connection

Three inverters in one phase and only one inverter for the remaining two phases

Power Connection

Communication Connection

Two inverters in two phases and only one inverter for the remaining phase
Power Connection

Communication Connection

Two inverters in one phase and only one inverter for the remaining phases: Power Connection

Communication Connection

One inverter in each phase
Power Connection

Communication Connection

WARNING: Do not connect the current sharing cable between the inverters which are in different phases. Otherwise, it may damage the inverters.

PV Connection

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

• CAUTION: Each inverter should connect ID PV modules separately.

LCD Setting and Display

Setting Program

28

| **** AC output mode “This setting is only available when the inverter is in standby mode (Switch on,

later Switch off).

|

| When the units are used in parallel with single phase, please select “PAL” 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 “3Pl” 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 share current cable to units which are on the same phase.

Do NOT connect share current cable between units on different phases.

**** Besides, power saving function will be automatically disabled.

---|---|---|---

L1 phase
L2 phase
L3 phase

Fault code display

Commissioning

Parallel in single phase

• Step 1 : Check the following requirements before commissioning

  • Correct wire connection
  • Ensure all breakers in Line wires of load side are open and each Neutral wires of each unit are connected together.

• Step 2 : Turn on each unit and set “PAL” in LCD setting program 28 of each unit. And then shut down all units.

  • NOET: It’s necessary to turn off switch when setting LCD program. Otherwise, the setting can not be programmed.

• Step : 3T urn on each unit.

  • NOTE: Master and slave units are randomly defined.

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

• 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 commissioning

  • Correct wire connection
  • Ensure all breakers in Line wires of load side are open and each Neutral wires of each unit are connected together.

• Step 2 : Turn on all units and configure LCD program 28 as Pl, P2 and P3 sequentially. And then shut down all units.

  • NOET : It’s necessary to turn off switch when setting LCD program. Otherwise, the setting can not be programmed.

• Step 3 : Turn on all units se uentiall .

• 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

• 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 in load side, it’s better to have whole system in operation first.
  • Note 2 : Transfer time for this operation exists. Power interruption may happen to critical devices, which cannot bear transfer time.

Troubleshooting

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