Anern Hybrid Solar Inverter User Manual

1. Introduction

This manual describes the assembly, installation, operation, and troubleshooting of the Anern Hybrid Solar Inverter. Please read this manual carefully before installation and operation, and keep it for future reference.

1.1 Product Overview

The Anern Hybrid Solar Inverter is a multi-function inverter/charger, combining the functions of an inverter, solar charger, and battery charger to provide uninterruptible power support. It features a comprehensive LCD display for user-configurable settings and easy operation.

1.2 Features

• Pure sine wave inverter
• Configurable input voltage range for home appliances and personal computers via LCD setting
• Configurable battery charging current based on applications via LCD setting
• Configurable AC/Solar Charger priority via LCD setting
• Compatible with mains voltage or generator power
• Auto restart while AC is recovering
• Overload, over temperature, and short circuit protection
• Smart battery charger design for optimized battery performance
• Cold start function

1.3 Basic System Architecture

The inverter/charger can be integrated into a complete running system that includes a generator or utility power source and PV modules. It can power various home and office appliances, including motor-type appliances up to 1.5HP.

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 specifications 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 procedures when you want to disconnect AC or DC terminals. Please refer to the INSTALLATION section of this manual for details.
10. GROUNDING INSTRUCTIONS: This inverter/charger should be connected to a permanent grounded wiring system. Be sure to comply with local requirements and regulations to install this inverter.
11. NEVER cause AC output and DC input short circuits. Do NOT connect to the mains when DC input short circuits.
12. Warning: Only qualified service persons are able to service this device. If errors still persist after following troubleshooting table, send this inverter/charger back to local dealer or service center for maintenance.

Inverter Use Notice:

• The starting power of inductive load electrical appliances shall be at least three times the rated power of the electrical appliances. If the starting power exceeds the inverter power, the inverter may be damaged. Please select a suitable model before purchasing.
• Please connect the circuit correctly according to the instructions, and install switches for each circuit.
• Starting sequence: first turn on the battery switch, start the inverter, and turn on the PV, mains, and load switches.
• Shutdown sequence: turn off the switches of load, PV, and mains, turn off the inverter, and finally turn off the battery.

3. Setup

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 wirings, take off the bottom cover by removing two screws.

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 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.
• Be sure to keep other objects and surfaces clear to guarantee sufficient heat dissipation and space for removing wires.

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

Install the unit by screwing two screws. It's recommended to use M4 or M5 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. 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.

Follow these 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 shown in the diagram.
4. Insert the battery wires flatly into battery connectors of the inverter and make sure the bolts are tightened with a torque of 2 Nm in a clockwise direction. Ensure polarity is correct at both the battery and the inverter/charger. 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 the 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 the inverter and AC input power source. This will ensure the inverter can be securely disconnected during maintenance and fully protected from overcurrent of AC input. The recommended spec of AC breaker is 20A for 2.0KW and 30A for 3.2KW.

Attention: After 90s of mains power connection to the inverter, the machine is connected to the mains and starts to work.

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 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.

Follow these steps to implement AC input/output connection:

1. Before making AC input/output connection, be sure to open the 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 the 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)
4. Then, insert AC output wires according to polarities indicated on the terminal block and tighten 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.

3.6 PV Connection

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

PV Module Selection

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

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

Taking a 250Wp PV module as an example, the recommended module configurations are:

PV Module Wire Connection

Follow these 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, put the bottom cover back by screwing four screws.

4. Operating Instructions

4.1 Power ON/OFF

Once all wiring is properly connected, and the machine is connected to the battery, press the power switch (located on the side of the machine) to start the unit. The machine will not start if the mains or photovoltaic power is connected but the switch is off.

4.2 Operation and Display Panel

The operation and display panel is on the front of the inverter. It includes three indicators, four function keys, and an LCD display, indicating the operating status and input/output power information.

LED Indicators

Function Keys

4.3 LCD Setting

After pressing and holding the ENTER button for 3 seconds, the unit will enter setting mode. Press "UP" or "DOWN" to select setting programs. Then, press "ENTER" to confirm the selection or ESC to exit.

Setting Programs Overview

The manual provides detailed programs for configuring various aspects of the inverter's operation, including:

• Program 00: Exit setting mode (Escape, One-button restore setting options)
• Program 01: Output source priority (Utility first, Solar first, SBU priority, MKS priority)
• Program 02: Maximum charging current (10A to 140A options)
• Program 03: AC input voltage range (Appliances, UPS)
• Program 05: Battery type (AGM, Flooded, User-Defined)
• Program 06: Auto restart when overload occurs (Restart disable, Restart enable)
• Program 07: Auto restart when over temperature occurs (Restart disable, Restart enable)
• Program 09: Output frequency (50Hz, 60Hz)
• Program 10: Output voltage (220V, 230V, 240V)
• Program 11: Maximum utility charging current (2A to 80A options)
• Program 12: Setting voltage point back to utility source (for MKS/SBU priority, 2.0KW/12V default 11.5V, 3.2KW/24V default 23V)
• Program 13: Setting voltage point back to battery mode (for MKS/SBU priority, 2.0KW/12V default 13.5V, 3.2KW/24V default 27V)
• Program 14: Maximum battery discharge current (10A to 120A options)
• Program 16: Charger source priority (Solar first, Solar and Utility, Only Solar)
• Program 18: Alarm control (Alarm on, Alarm off)
• Program 19: Auto return to default display screen (Return to default, Stay at latest screen)
• Program 20: Backlight control (Backlight on, Backlight off)
• Program 22: Beeps while primary source is interrupted (Alarm on, Alarm off)
• Program 23: Overload bypass (Bypass disable, Bypass enable)
• Program 25: Record fault code (Record enable, Record disable)
• Program 26: Bulk charging voltage (C.V voltage) (2.0KW/12V default 14.1V, 3.2KW/24V default 28.2V)
• Program 27: Floating charging voltage (2.0KW/12V default 13.5V, 3.2KW/24V default 27V)
• Program 29: Low DC cut-off voltage (2.0KW/12V default 10.0V, 3.2KW/24V default 20.0V)
• Program 30: Battery equalization (Battery equalization, Battery equalization disable)
• Program 31: Battery equalization voltage (2.0KW/12V default 14.6V, 3.2KW/24V default 29.2V)
• Program 33: Battery equalized time (60min default)
• Program 34: Battery equalized timeout (120min default)
• Program 35: Equalization interval (30 days default)
• Program 36: Equalization activated immediately (Enable, Disable)
• Program 39: RGB control (Backlight on, RGB off)
• Programs 81-85: Time setting (Year, Month, Day, Hour, Minute)
• Program 86: Clear Energy (Enable, Disable)
• Programs 87-90: Timer settings for AC charging (Start Hour/Minute, Deadline Hour/Minute)

4.4 Display Setting

The LCD display information can be cycled by pressing the "Up" or "DOWN" keys. Selectable information includes: input voltage/output voltage, input frequency, PV voltage, PV input current, PV input power, charging current, charging power, battery voltage, output frequency, load percentage, load in VA, load in Watt, DC discharging current, Daily power generation, Monthly power generation, Gross generation, Date, Time, and main CPU Version.

4.5 Operating Mode Description

The inverter operates in various modes, each with specific behaviors and display indications:

• Standby mode / Power saving mode: The inverter is not outputting power, but can charge batteries. In power saving mode, output is off if the connected load is very low.
• Line Mode: The unit provides output power from the mains and charges the battery. If 'solar first' is selected and solar energy is insufficient, solar and utility will power loads and charge the battery.
• Battery Mode: The unit provides output power from the battery and PV power. PV energy will supply power to loads and charge the battery.
• Fault mode: Errors caused by internal circuit issues or external reasons like over temperature or output short circuit. PV energy and utility can still charge batteries.

5. Maintenance

5.1 Battery Equalization Description

The equalization function reverses the buildup of negative chemical effects like stratification and helps remove sulfate crystals from battery plates. This process is crucial for maintaining battery capacity and is recommended periodically.

How to Apply Equalization Function

You must enable the battery equalization function in monitoring LCD setting program 30 first. Then, you may apply this function by either of these methods:

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

When to Equalize

In the float stage, when the setting equalization interval is reached, or equalization is activated immediately, the controller will enter the Equalize stage.

Equalize Charging Time and Timeout

In the Equalize stage, the controller supplies power to charge the battery until the battery voltage reaches the equalization voltage. Constant-voltage regulation maintains this voltage until the set battery equalized time is reached. If the battery voltage does not rise to the equalization point within the equalized time, the charge controller will extend the time. If the voltage is still low after the timeout, the charge controller will stop equalization and return to the float stage.

5.2 Clearance and Maintenance for Anti-Dust Kit (Optional)

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

1. Remove screws as shown in the manual.
2. Remove the dustproof case and take out the air filter foam.
3. Clean the air filter foam and dustproof case. After cleaning, 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

6.2 Warning Indicator

6.3 Frequently Asked Questions (FAQ)

• Q: Whether to start with battery? A: No.
• Q: Whether it can directly supply power to the load? A: Yes.
• Q: Whether it can be connected to the grid? A: PV gives priority to power supply to the load, and extra to charge the battery. More can be integrated into the grid (needs to be based on local government policies). Note: 1600W and 3000W models cannot send remaining power to the grid.
• Q: How many solar panels need to be connected? A: To start the inverter normally, the voltage of the solar panel is recommended to be 300V-400V, with a maximum not exceeding 500V. For PRO-3.6KW/PLUS-6.2KW, the power of the solar panel should not exceed 6.2KW/6.5KW. For example, 10 pcs of 250W 30V solar panels connected in series.
• Q: Can inverters be connected in series or parallel? A: No.
• Q: Is this an on-grid tied inverter? Can it be output to utility? A: Yes. It is a hybrid inverter that can be both off-grid and on-grid connected.
• Q: Does the inverter have to be connected to the battery? A: Can be connected with or without battery, but without the battery, the voltage of the solar panel should exceed 360Vdc.
• Q: What types of batteries can be used? A: Lead-acid batteries, gel batteries, Lithium Iron Phosphate (LiFePo4), and lithium batteries can be used. A 24V battery is for the 3.6KW model, and a 48V battery for the 6.2KW model. The battery capacity cannot be less than 100AH.
• Q: Can it be used in air conditioners, water pumps, and wind turbines? A: It can be used in air conditioners, but not in water pumps and wind turbines.
• Q: Is it a high frequency inverter or a low frequency inverter? A: High frequency.
• Q: Can the utility be used to power the inverter when there is no sun? A: Yes.
• Q: How to choose the power of the inverter according to the household appliances? A: If household appliances contain inductive load appliances, such as refrigerators, washing machines, air conditioners, etc., the power of the inverter should be at least three times the total power of the inductive load appliances, otherwise the appliances may not be able to start.
• Q: Is it possible to use PV, battery, grid supply at the same time? A: Yes. In the default PV priority mode, when the PV input is insufficient, the battery and utility will be used.

7. Specifications

7.1 Product Properties

7.2 Line Mode Specifications

7.3 Inverter Mode Specifications

7.4 Charge Mode Specifications

Utility Charging Mode

MPPT Solar Charging Mode

7.5 General Specifications

8. User Tips

• Inductive Load Sizing: When connecting appliances with inductive loads (e.g., refrigerators, washing machines, air conditioners), ensure the inverter's power rating is at least three times the total power of these appliances to prevent startup issues or damage.
• Battery-less Operation: The inverter can operate without a battery, but the solar panel voltage must exceed 360Vdc for proper function.
• Solar Panel Voltage: For normal inverter startup, aim for a solar panel voltage between 300V-400V, not exceeding 500V.
• System Integration: This is a hybrid inverter, capable of both off-grid and on-grid connections. It prioritizes PV power, supplementing with battery and utility power when solar input is insufficient.
• Regular Maintenance: Clean the anti-dust kit monthly to ensure optimal performance and longevity of the inverter.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact your local dealer or the manufacturer directly. Refer to the official product website or your purchase documentation for specific contact details and warranty terms.

A user manual in PDF format is available for download from the manufacturer's website for detailed instructions and diagrams: Anern Hybrid Solar Inverter User Manual (PDF)