Anern 6.2KW Hybrid Solar Inverter User Manual

1. Introduction

1.1 Purpose

This manual describes the assembly, installation, operation, and troubleshooting of the Anern 6.2KW Hybrid Solar Inverter. Please read this manual carefully before installations and operations. Keep this manual for future reference.

1.2 Scope

This manual provides safety and installation guidelines as well as information on tools and wiring for the hybrid solar inverter.

1.3 Features

• Pure sine wave solar inverter
• Inverter running without battery
• One-key restoration to factory settings
• Lithium battery automatic activation by PV function
• Built-in 120A MPPT solar controller
• Max 6200W (for 4.2KW) & 6500W (for 6.2KW) solar charge
• High PV input voltage range (60-450VDC)
• Built-in anti-dust kit for harsh environments
• Smart battery charge design to optimize battery life
• Dual output
• WIFI available for iOS and Android

1.4 Basic System Architecture

This multi-function inverter/charger combines inverter, solar charger, and battery charger functions to provide uninterruptible power support. Its comprehensive LCD display offers user-configurable and easy-accessible button operation for settings like battery charging current, AC/solar charger priority, and acceptable input voltage. The system can include a generator or utility, PV modules, and external battery packs to power various home and office appliances.

1.5 Product Overview

The inverter features an LCD display, status and charging indicators, fault indicator, function buttons, power on/off switch, various input/output ports, and an anti-dust kit.

2. 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 the INSTALLATION section of this manual for the details.
10. One piece of 150A fuse is 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.

3. Installation

3.1 Unpacking and Inspection

Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should have received the unit and a user manual.

3.2 Preparation

Before connecting all lines, remove the screws under the machine and remove the bottom cover plate.

3.3 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.
• 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.
• 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.
• Make sure that other objects and surfaces are left with enough space from the machine to ensure adequate heat dissipation and that there is enough room to remove the wires.

SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.

Install the unit by screwing two screws. It's recommended to use M6 screws.

3.4 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 as below.

Recommended battery cable size:

Please follow below steps to implement battery connection:

1. Remove insulation sleeve 18 mm for positive and negative conductors.
2. Suggest to put bootlace ferrules on the end of positive and negative wires with a proper crimping tool.

3. Connect all battery packs as below chart.

4. Insert the battery wires flatly into battery connectors of inverter and make sure the bolts are tightened with torque of 2 Nm in clockwise direction. Make sure polarity at both the battery and the inverter/charge is correctly connected and conductors are tightly screwed into the battery terminals. Recommended tool: #2 Pozi Screwdriver.

WARNING: Shock Hazard. Installation must be performed with care due to high battery voltage in series.

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 (-).

3.5 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 32A for 3.6KW/4.2KW and 50A for 6.2KW.

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.

• 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.

• L-LINE (brown or black)
• N-Neutral (blue)

6. Make sure the wires are securely connected.

3.6 PV Connection

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

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.

Suggested cable requirement for PV wires:

PV Module Selection:

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

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

PV Module Wire Connection:

Please follow below steps to implement PV module connection:

1. Remove insulation sleeve 10 mm for positive and negative conductors.
2. Suggest to put bootlace ferrules on the end of positive and negative wires with a proper crimping tool.
3. Check correct polarity of wire connection from PV modules and PV input connectors. Then, connect positive pole (+) of connection wire to positive pole (+) of PV input connector. Connect negative pole (-) of connection wire to negative pole (-) of PV input connector. Recommended tool: 4mm blade screwdriver.

3.7 Final Assembly

After connecting all wirings, please put bottom cover back by screwing two screws.

3.8 Communication Connection

3.8.1 Wi-Fi cloud communication (option):

Please use supplied communication cable to connect to inverter and Wi-Fi module. Download APP and install it from the APP store, and Refer to "Wi-Fi Plug Quick Installation Guideline" to set up network and registering. The inverter status would be shown by mobile phone APP or webpage of computer.

3.8.2 GPRS cloud communication (option):

Please use supplied communication cable to connect to inverter and GPRS module, and then apply external power to GPRS module. Download APP and install it from the APP store, and Refer to "GPRS RTU Quick Installation Guideline" to set up network and registering. The inverter status would be shown by mobile phone APP or webpage of computer.

3.8.3 Battery communication

The communication between the battery and the inverter can be realized through the battery communication interface, so that the inverter and the lithium battery can exchange information (Baud rate: 9600).

3.8.4 Lithium battery and inverter connection:

Use power cables, communication cables for lithium batteries, and inverters to connect. Note: Lithium battery and inverter positive and negative positions, check the correct installation. The RJ45 connector of the communication cable connects to the BMS port of the inverter, and the other RJ45 connector connects to the RS485 port of the lithium battery. Before connecting, make sure that the lithium battery and inverter are turned off. (It is recommended to install a circuit breaker for the power cables of the lithium battery and the inverter battery interface. Otherwise, a spark may occur.)

4. Operation

4.1 Power ON/OFF

Once the unit has been properly installed and the batteries are connected well, simply press the On/Off switch (located on the button of the case) to turn on the unit.

4.2 Operation and Display Panel

The operation and display panel, shown in the product overview, is 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:

Function Keys:

4.3 LCD Display Icons

The LCD display provides various information about the inverter's status and operation. This includes input source information, configuration program and fault information, output information, battery information, load information, mode operation information, and mute operation status.

4.4 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. Then, press "ENTER" button to confirm the selection or ESC button to exit. Refer to the detailed tables in the PDF manual for specific setting programs (00-45).

4.5 Operating Mode Description

The inverter supports various operating modes, including Standby, Charged, and Discharged states, with different display information depending on the power conditions and load. It also supports Grid-Tie Operation.

RGB Light (option)

• Battery Mode: Red Light
• Utility Mode: Blue Light
• PV Mode: Purple Light

4.6 Battery Equalization Description

Equalization function is added into the 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 30 first. Then, you may apply this function in device by either one of following methods:

1. Setting equalization interval in program 35.
2. Active equalization immediately in program 36.

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.

4.7 Mains and Lithium Battery Activation Function

1. After 90s of mains power connection to the inverter, the machine is connected to the mains and starts to work.
2. The inverter is in lithium battery mode (item 05 is LIP or LIL). After the mains is connected, the battery is not connected, and the mains activation function is automatically enabled.

5. Maintenance

5.1 Overview

Every inverter is already installed with an anti-dust kit from the factory. The inverter will automatically detect this kit and activate an internal thermal sensor to adjust the internal temperature. This kit also keeps dust from your inverter and increases product reliability in harsh environments.

5.2 Clearance and Maintenance

1. Please loosen the screw in a counterclockwise direction on the top of the inverter.
2. Then, the dustproof case can be removed, and the air filter foam taken out.
3. Clean the air filter foam and dustproof case. After clearance, re-assemble the dust-kit back to the inverter.

NOTICE: The anti-dust kit should be cleaned from dust every one month.

6. Troubleshooting

6.1 Fault Reference Code

The inverter's LCD display will show specific fault codes if an issue occurs. Refer to the table below for common fault codes and their explanations.

The battery fault code is added in lithium battery mode:

6.2 Warning Indicator

The inverter provides audible alarms and flashing icons for various warning conditions.

Added a battery warning code in lithium battery mode:

6.3 Troubleshooting Table

7. Specifications

7.1 Line Mode Specifications

7.2 Inverter Mode Specifications

7.3 Two Load Output Power

7.4 Charge Mode Specifications

Utility Charging Mode

MPPT Solar Charging Mode

7.5 Grid-Tie Operation

7.6 General Specifications

8. User Tips

• Inductive Load Appliances: If connecting inductive load appliances (e.g., refrigerators, washing machines, air conditioners), ensure the inverter's power is at least three times the total power of these appliances to ensure proper startup.
• Correct Wiring: Always connect circuits correctly according to the instructions and install switches for each circuit.
• Startup Sequence: First, turn on the battery switch, then start the inverter, and finally turn on the PV, mains, and load switches.
• Shutdown Sequence: Turn off the switches for the load, PV, and mains, then turn off the inverter, and finally turn off the battery.
• AC and PV Input Activation: AC and PV inputs should only be turned on AFTER the inverter is already working to prevent potential damage.
• PV Input Display: If the PV input displays '0', it indicates that the solar panel is either not connected or there is insufficient lighting.
• Data View and Setup: The inverter's display allows you to view various operational data and configure settings.

9. Frequently Asked Questions (FAQ)

Q: Can inverters be connected in series or parallel?

A: NO, this inverter model is not designed for series or parallel connection.

Q: What types of batteries can be used?

A: Lead-acid batteries, gel batteries, Lithium Iron Phosphate (LiFePo4), and other lithium batteries can be used. For the 3.6KW model, a 24V battery is required, and for the 6.2KW model, a 48V battery is required. The battery capacity should not be less than 100AH.

Q: Can it be used with air conditioners, water pumps, and wind turbines?

A: It can be used with air conditioners. However, it is not suitable for use with water pumps and wind turbines.

Q: How do I choose the correct inverter power for my household appliances?

A: If your household appliances include inductive load appliances (e.g., refrigerators, washing machines, air conditioners), the inverter's power should be at least three times the total power of these inductive load appliances. This ensures that the appliances can start correctly without damaging the inverter.

Q: Is it possible to use PV, battery, and grid supply at the same time?

A: YES. The inverter operates in default PV priority mode. When the PV input is insufficient, the system will automatically utilize power from the battery and utility grid.

10. Appendix: Approximate Back-up Time Table

This table provides approximate backup times based on load and battery configuration.

10.1 Backup Time @ 24Vdc (for 3.6KW/4.2KW models)

10.2 Backup Time @ 48Vdc (for 6.2KW model)

Note:

1. 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.
2. The final interpretation right of this product belongs to the company.

11. Additional Resources

For a detailed user manual in PDF format, please refer to the official document: User Manual (PDF).

11.1 Wiring and Operation Video Guide

Watch this video for a visual guide on how to connect wires, start, and turn off the inverter.

Video: Wiring and Operation Guide for Anern Hybrid Solar Inverter