Anern 4.2KW Pure Sine Wave Hybrid Inverter

1. Introduction

1.1. Purpose

This manual provides instructions for the assembly, installation, operation, and troubleshooting of the Anern 4.2KW Pure Sine Wave Hybrid Inverter. Please read this manual carefully before proceeding with installation and operation to ensure safe and efficient use.

1.2. Target Group

This manual is designed for both professionals and end-users. While some operations can be handled by end-users, professionals should possess the following skills and knowledge:

• Understanding of inverter functionality and operation.
• Knowledge of handling crises and risks associated with electrical equipment installation and use.
• Proficiency in installing and commissioning electrical equipment and fixtures.
• Understanding and adherence to applicable standards and directives.
• Familiarity with all safety knowledge outlined in this manual.

1.3. Features

The Anern 4.2KW Hybrid Inverter is a multifunctional off-grid solar inverter integrating an MPPT solar charging controller, a high-frequency pure sine wave inverter, and a UPS function module. It is ideal for off-grid backup power supply and self-consumption systems. Key features include:

• Dual battery voltage modes: 2300W in 12V battery mode and 4200W in 24V battery mode.
• Pure sine wave output.
• Selectable input voltage range for utility grid based on load requirements (household appliances/personal computers).
• Adjustable charging current via LCD based on battery requirements.
• Ability to power loads simultaneously from solar energy and utility grid.
• AC input compatible with mains and generator.
• Automatic restart when mains power is restored.
• Overload, over temperature, and short circuit protection.
• Intelligent battery charging design for optimal battery utilization.
• RS485 port for BMS communication.
• Cold start function.
• Built-in MPPT with an operating voltage range of 55V~500V and open circuit voltage of 500Voc.
• Optional WiFi remote monitoring for system status via mobile phones or websites.
• Optional RGB lamp indicating inverter status with different colors.

Image: The Anern FGI-DU4200 Hybrid Inverter, highlighting its 4.2KW power, 12/24Vdc compatibility, 50/60Hz frequency, and 220/230/240Vac output.

Image: Explanation of the inverter's dual voltage flexibility, supporting 12VDC (2300W) and 24VDC (4200W) modes with pure sine wave output and customizable charging parameters via LCD.

1.4. Basic System Architecture

The inverter/charger can be integrated into a system with various components to achieve complete operation. A typical setup includes:

• Solar modules (optional)
• Generator or mains electricity
• External battery packs
• Home appliances

This inverter can power a wide range of home and office appliances, including motor-type appliances like tube lights, fans, refrigerators, and air conditioners. Consult your system integrator for specific architectural requirements.

Image: A diagram illustrating the hybrid power system, showing connections from solar panels, generator, and utility to the inverter, which then connects to external battery packs and various home appliances.

Image: An illustration of a house powered by a solar system, demonstrating how the inverter connects solar panels, batteries, and the supply network to power various household appliances like TVs, lights, refrigerators, coffee machines, microwave ovens, and CPAP machines.

2. Safety Regulations

Warning: This article contains important safety and operation instructions. Please read and save this manual for future reference.

1. Always choose the corresponding battery setting (lead-acid or lithium). Incorrect settings can lead to system malfunction.
2. Before use, read all instructions and cautions on the unit and understand all battery models and relevant chapters in this manual.
3. Never short-circuit AC output and DC input. Do not connect to mains if DC input is short-circuited.
4. Never charge a non-rechargeable battery.
5. Do not disassemble the unit. For maintenance or repair, send it to a professional technical service center. Incorrect reassembly poses risks of electric shock or fire.
6. To reduce electric shock risk, disconnect all wiring before maintenance or cleaning. Turning off the device alone does not eliminate risk.
7. Exercise extreme caution when using metal tools near batteries. Sparks from falling tools can cause short circuits or damage to electronic components, potentially leading to explosions.
8. For optimal operation, select appropriate cable sizes as instructed.
9. When disconnecting AC or DC terminals, strictly follow the installation procedure outlined in this manual.
10. This off-grid solar inverter must be connected to a permanent grounding wiring system, complying with local requirements and regulations.
11. Provide a fuse with specified ratings for battery power supply overcurrent protection.
12. Warning! Only professional service personnel can repair this equipment. If troubleshooting fails, return the inverter to your local dealer or service center.

3. Installation

3.1. Unpacking and Inspection

Upon receiving the inverter, carefully unpack it and inspect for any damage. The package should contain:

• Inverter unit x 1
• User manual x 1 (Refer to the official PDF manual for detailed diagrams and instructions: User manual (PDF))

3.2. Preparation Before Installation

Before connecting any wiring, remove the bottom cover of the inverter by unscrewing the two retaining screws.

3.3. Mounting the Inverter

Consider the following points for installation:

• Do not install on flammable building materials.
• Install on a solid surface.
• Mount at eye level for easy reading of the LCD display.
• Ensure a gap of 20-50 cm around the equipment for proper ventilation and heat dissipation.
• The operating environment temperature should be between 0-55°C.
• It is best to install the unit vertically against a wall, leaving space from the ground.

Suitable for installation on concrete or other non-combustible surfaces only.

Tighten the screws to secure the installation. M4 or M5 screws are recommended for fixing the machine.

Image: Diagram showing recommended installation clearances for the inverter: 50cm above and below, and 20cm on each side, to ensure adequate ventilation and heat dissipation.

3.4. Battery Connection

Warning: Install an independent DC overcurrent protector or disconnect device between the battery and the inverter. All wiring must be performed by qualified personnel. Use appropriate cable sizes for system safety and efficient operation.

3.4.1. Lead-Acid Battery Connection

Recommended battery cable specifications:

Note: The recommended charging current for lead-acid batteries is 0.2C (C is battery capacity).

Steps for connection:

1. Connect the battery using the recommended cable specifications.
2. Connect all battery packs as needed.
3. Insert the ring terminal of the battery cable into the inverter's battery connector. Ensure bolts are tightened to 2-3 Nm. Verify correct polarity (+ to + and - to -) and tighten the ring terminal to the battery terminal.

Caution: Do not place anything between the inverter terminal and the ring terminal to prevent short circuits or overheating. Do not apply antioxidant to the terminal before tightening. Before final DC connection, ensure positive (+) is connected to positive (+) and negative (-) to negative (-).

Connect all battery packs as shown in the diagrams below:

Image: Diagrams showing battery connection configurations. For 12V (2300W), batteries are connected in parallel. For 24V (4200W), batteries are connected in series.

Image: Visual representation of various battery types supported by the inverter, including Flooded, Gel, AGM, Lithium, SLD (Sealed Lead-Acid), and User Custom Battery.

3.4.2. Lithium Battery Connection and BMS Communication

Only lithium batteries with matched BMS communication protocols are allowed. Follow steps 1 and 2 from Lead-Acid Battery Connection. Additionally:

3. Connect one side of the RJ45 cable to the inverter's BMS communication port.
4. Insert the other side of the RJ45 cable into the RS485 communication port on the lithium battery.

Note: If using a lithium battery, ensure the battery and inverter are connected with a BMS communication cable, and select "LIB" mode in program 05.

The inverter BMS port's PIN definition:

To communicate with the lithium battery BMS, press the "ENTER" button for a long time, set the battery type to "LIB" in program 05, then select the matching battery protocol in Program 10.

3.5. AC Input/Output Connection

Caution: Install a separate AC breaker between the inverter and the AC input power source. Do not mis-connect input and output connectors. All wiring must be performed by qualified personnel. Use appropriate cable sizes.

Suitable cable specifications for AC wires:

Steps for connection:

1. Before making AC input/output connections, ensure the DC protector or disconnector is open.
2. Remove 10mm of insulation sleeve for six conductors. Shorten phase L and neutral conductor N by 3mm.
3. Insert AC input wires according to polarities on the terminal block and tighten screws. Connect PE protective conductor (yellow-green) first, then LINE (brown or black), and Neutral (blue).
4. Warning: Ensure AC power source is disconnected before hardwiring.
5. Insert AC output conductor according to polarity identification and tighten the screw (LINE: brown or black, Neutral: blue).
6. Ensure all wires are firmly connected.

Caution: Ensure all AC cables are connected correctly according to polarity. Appliances like air conditioners require 2-3 minutes to restart. A power shortage followed by quick recovery can damage connected appliances. Check the air conditioner manufacturer for time-delay functions.

3.6. PV Connection

Caution: Before connecting the PV module, install a separate DC circuit breaker between the inverter and PV module. All wiring must be performed by qualified personnel. Use appropriate cable sizes.

Recommended cable specifications:

3.6.1. PV Module Selection

When selecting PV modules, consider these parameters:

• Open circuit voltage (Voc) of PV modules must not exceed the max. PV array open circuit voltage of the inverter.
• Open circuit voltage (Voc) of PV modules should be higher than the minimum battery voltage.

Example for 250Wp PV module configuration:

3.6.2. Equipment Assembly (PV)

Steps for PV module connection:

1. Remove 10mm of insulation sleeve for positive and negative conductors.
2. Check correct polarity of connection cable from PV modules and PV input connectors. Connect positive (+) to positive (+) and negative (-) to negative (-).
3. Ensure wires are securely connected.

3.7. Final Assembly

After connecting all wires, reattach the bottom cover and secure it with screws.

4. Operation

4.1. Power On/Off

Once the machine is correctly installed and batteries are connected, press the On/Off switch to power on the inverter.

4.2. Operation and Display

The front panel of the inverter features an LCD screen and four function keys for indicating operation status and input/output power information.

Image: A detailed view of the inverter's front panel, showing the LCD screen, status indicators, and function keys (ESC, UP, DOWN, ENTER).

4.2.1. RGB Light (Optional)

The optional RGB lamp indicates inverter status:

• Green light: Inverter state
• Blue light: Utility state
• Red light: Failure state

4.2.2. LED Indicator

4.2.3. Function Keys

4.2.4. LCD Display Icons

The LCD displays various icons to provide system information:

• Input Source Information: AC (AC input), PV (PV input).
• Input/Battery Information: Input voltage, input frequency, PV voltage, battery voltage, charger current.
• Configuration Program and Fault Information: Setting programs, flashing warning code, lighting fault code.
• Output Information: Output voltage, output frequency, load percentage, load in VA, load in Watt, discharging current.
• Battery Information: Battery level (0-24%, 25-49%, 50-74%, 75-100%), charging status.
• Load Information: Overload indicator, load level by percentage.
• Mode Operation Information: Icons for mains connection, PV panel connection, utility power supply to load, utility charger circuit working, DC/AC inverter circuit working, unit alarm disabled.

4.2.5. LCD Setting Programs

Press and hold the "ENTER" button for 3 seconds to enter setting mode. Use "UP" or "DOWN" to select programs, then "ENTER" to confirm or "ESC" to exit.

Key settings include:

• 01 Output source priority: Configure load power source priority (SUB, SBU, MKS).
• 02 Maximum charging current: Configure total charging current for solar and utility chargers (10A-100A).
• 03 AC input voltage range: Select for appliances (90-280VAC) or UPS (170-280VAC).
• 04 Power saving mode: Enable/disable power saving.
• 05 Battery type: Select AGM, Flooded, User-Defined, or LIB (Lithium).
• 06 Auto restart when overload occurs: Enable/disable.
• 07 Auto restart when over temperature occurs: Enable/disable.
• 08 Output voltage: Set 220V, 230V, or 240V.
• 09 Output frequency: Set 50Hz or 60Hz.
• 10 Lithium battery protocol: Select PYLON or PACE.
• 11 Maximum Utility charging current: Set 10A-100A.
• 12 Setting voltage point back to utility charging: Configure voltage for SBU and MKS priorities.
• 13 Set the voltage point back to battery discharge: Configure voltage for SBU and MKS priorities.
• 16 Charger source priority: Configure charger source priority (Solar first, Solar and Utility, Only Solar).
• 18 Alarm control: Alarm on/off.
• 19 Auto return to default display screen: Enable/disable.
• 20 Backlight control: Backlight on/off.
• 22 Beeps while primary source is interrupted: Alarm on/off.
• 23 Overload bypass: Enable/disable.
• 25 Record fault code: Enable/disable.
• 26 Bulk charging voltage (C.V voltage): Set 12V/24V models.
• 27 Floating charging voltage: Set 12V/24V models.
• 29 Low DC cut-off voltage: Set 12V/24V models.
• 33 Battery equalization: Enable/disable.
• 34 Battery equalization voltage: Set 12V/24V models.
• 35 Battery equalized time: Set 5-900 minutes.
• 36 Battery equalized timeout: Set 5-900 minutes.
• 37 Equalization interval: Set 0-90 days.
• 39 Equalization activated immediately: Enable/disable.
• 48 RGB lighting: RGB lights off/on.

4.2.6. Operating Mode Description

The inverter supports various operating modes, each with specific power flow:

• Standby mode / Power saving mode: No output is supplied, but batteries can be charged by AC input.
• Line Mode: Unit provides output power from mains, also supplying solar and mains power to loads.
• Battery Mode: Unit provides output power from battery and PV power.

Image: Icons representing different operating modes, such as charging by utility and PV energy, charging by utility only, charging by PV energy only, and battery/solar supply power to loads.

5. Maintenance

5.1. Anti-Dust Kit Clearance and Maintenance

The inverter comes with a factory-installed anti-dust kit to protect against dust and enhance reliability. The inverter automatically detects this kit and adjusts the internal thermal sensor.

Maintenance steps:

1. Remove the screws securing the anti-dust kit.
2. Remove the air filter.
3. Clean the air filter.
4. Reinstall the dust removal net to the inverter.

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

Image: Diagram illustrating the steps to remove the anti-dust kit for cleaning, showing the screws to be removed and the air filter's location.

6. Troubleshooting

6.1. Battery Alarm Code

6.2. Battery Fault Code

6.3. Warning Code

6.4. General Troubleshooting

7. Specifications

7.1. Table 1: Specification of LINE Mode

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

7.2. Table 2: Specification of Inverter Mode

7.3. Table 3: Specification of Charging Mode

7.3.1. Solar Charging Mode

7.4. Table 4: General Specifications

8. User Tips

• Fan Noise Reduction: The standard cooling fans can be noisy. Consider replacing them with quieter alternatives, such as Arctic P8 Silent fans. Be aware that this may require re-soldering connectors as the inverter might have a 4-pin connector for 3-wire fans.
• Battery Configuration: For optimal performance with LiFePO4 batteries, ensure proper setup. If instructions are unclear, utilize translation tools for the manual or seek assistance from experienced users or professionals.
• Patience with Delivery: If ordering internationally, be prepared for extended delivery times (e.g., over 70 days).

9. Warranty and Support

For any issues not resolved by the troubleshooting guide, or for warranty claims and professional service, please contact your local dealer or the service center where you purchased the product. Only qualified service personnel should attempt repairs beyond basic troubleshooting.