1. Introduction
This manual describes the assembly, installation, operation, and troubleshooting of the Anern Hybrid Solar Inverter, model AN-SCI-ECO-3200. This multi-function inverter/charger combines the functions of an inverter, solar charger, and battery charger to provide uninterruptible power support for various applications. Its comprehensive LCD display allows for user-configurable settings such as battery charging current, AC/solar charger priority, and acceptable input voltage ranges.
1.1 Product Overview
The AN-SCI-ECO-3200 is a pure sine wave hybrid inverter designed for off-grid home systems. It features a built-in 80A MPPT charger controller and a clear LCD display for monitoring system status.
Front view of the Anern Hybrid Solar Inverter AN-SCI-ECO-3200.
1.2 Key Features
- Pure sine wave inverter output.
- 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.
- Automatic restart while AC is recovering.
- Multiple protections: Overload, Over temperature, Short circuit.
- Smart battery charger design for optimized battery performance.
- Cold start function.
- Upgraded MPPT voltage range: 30-400VDC.
- High efficiency 80A MPPT controller.
- Built-in anti-dust kit.
Diagram illustrating multiple protection features (Overcurrent, Low Voltage, Short Circuit, Overheating, Overload, 50/60Hz automatic frequency range) and smart charging capabilities.
2. Safety Instructions
WARNING: This chapter contains important safety and operating instructions. Read and keep this manual for future reference.
- Before using the unit, read all instructions and cautionary markings on the unit, the batteries, and all appropriate sections of this manual.
- 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.
- 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.
- To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning. Turning off the unit will not reduce this risk.
- CAUTION - Only qualified personnel can install this device with battery.
- NEVER charge a frozen battery.
- 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.
- 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.
- 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.
- One piece of 150A fuse is provided as over-current protection for the battery supply.
- 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.
- NEVER cause AC output and DC input short circuited. Do NOT connect to the mains when DC input short circuits.
- 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. Setup
3.1 Unpacking and Inspection
Before installation, carefully inspect the unit for any damage. Ensure the following items are included in the package:
- The inverter unit x 1
- User manual x 1
Video demonstrating the unboxing and initial product overview of the inverter.
3.2 Preparation
Before connecting any cables, remove the screws located under the machine and detach the bottom cover plate.
3.3 Mounting the Unit
Consider the following points when selecting an installation location:
- Do not mount the inverter on flammable construction materials.
- Mount on a solid surface.
- Install the inverter at eye level for easy LCD display readability.
- Allow approximately 20 cm clearance to the sides and 50 cm above and below the unit for proper air circulation and heat dissipation.
- The ambient temperature should be between 0°C and 55°C for optimal operation.
- The recommended installation position is vertically adhered to a wall.
- Ensure sufficient space around the machine for heat dissipation and wire management.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.
Install the unit using two M6 screws.
3.4 Battery Connection
CAUTION: For safety and compliance, install a separate DC over-current protector or disconnect device between the battery and inverter. Use appropriate cable sizes.
WARNING! All wiring must be performed by qualified personnel. Use the proper recommended cable for battery connection to reduce risk of injury.
Recommended battery cable size:
| Model | Wire Size | Cable (mm²) | Torque value (max) |
|---|---|---|---|
| 3.6KW/4.2KW/6.2KW | 1 x 2AWG | 25 | 2 Nm |
Battery Connection Steps:
- Remove 18 mm of insulation sleeve from positive and negative conductors.
- Apply bootlace ferrules to the wire ends using a crimping tool.
- Connect all battery packs as per the system requirements (e.g., for 24V systems, connect 12V batteries in series).
- Insert battery wires into the inverter's battery connectors, ensuring bolts are tightened to 2 Nm in a clockwise direction. Verify correct polarity (+ to + and - to -) at both the battery and inverter.
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, ensure positive (+) is connected to positive (+) and negative (-) to negative (-).
3.5 AC Input/Output Connection
CAUTION!! Install a separate AC breaker between the inverter and AC input power source. Recommended AC breaker: 32A for 3.6KW/4.2KW, 50A for 6.2KW.
CAUTION!! Do NOT mis-connect input and output connectors. There are two terminal blocks marked "IN" and "OUT".
WARNING! All wiring must be performed by qualified personnel. Use appropriate cable for AC input connection.
Suggested cable requirement for AC wires:
| Model | Gauge | Cable (mm²) | Torque Value |
|---|---|---|---|
| 3.6KW/4.2KW | 12 AWG | 4 | 1.2 Nm |
| 6.2KW | 10 AWG | 6 | 1.2 Nm |
AC Input/Output Connection Steps:
- Before connecting AC input/output, open the DC protector or disconnector.
- Remove 10mm of insulation sleeve for six conductors. Shorten phase L and neutral conductor N by 3mm.
- Insert AC input wires according to polarities (L-LINE: brown or black, N-Neutral: blue) indicated on the terminal block and tighten screws.
- Insert AC output wires according to polarities (L-LINE: brown or black, N-Neutral: blue) indicated on the terminal block and tighten screws.
- Ensure all wires are securely connected.
WARNING: Ensure AC power source is disconnected before hardwiring to the unit.
CAUTION: Appliances like air conditioners require 2-3 minutes to restart. Check if your appliance has a time-delay function to prevent damage from short power interruptions.
3.6 PV Connection
CAUTION: Install a DC circuit breaker between the inverter and PV modules.
WARNING! Use appropriate cable for PV module connection.
Suggested cable requirement for PV module connection:
| Model | Wire Size | Cable (mm²) | Torque value (max) |
|---|---|---|---|
| 3.6KW/4.2KW/6.2KW | 1 x 12AWG | 4 | 1.2 Nm |
PV Module Selection:
- Open circuit Voltage (Voc) of PV modules must not exceed the max. PV array open circuit voltage of the inverter (500Vdc).
- Open circuit Voltage (Voc) of PV modules should be higher than the minimum battery voltage.
PV Array Specifications:
| INVERTER MODEL | 3.6KW/4.2KW | 6.2KW |
|---|---|---|
| Max. PV Array Open Circuit Voltage | 500Vdc | |
| PV Array MPPT Voltage Range | 60Vdc~450Vdc | |
PV Module Wire Connection Steps:
- Remove 10 mm of insulation sleeve from positive and negative conductors.
- Apply bootlace ferrules to the wire ends using a crimping tool.
- Check correct polarity of wire connection from PV modules and PV input connectors. Connect positive (+) to positive (+) and negative (-) to negative (-). Recommended tool: 4mm blade screwdriver.
3.7 Final Assembly
After connecting all wirings, replace the bottom cover by screwing the two screws back in place.
3.8 Communication Connection
The inverter supports Wi-Fi and GPRS cloud communication options, as well as lithium battery communication.
1. Wi-Fi Cloud Communication (Option): Use the supplied communication cable to connect to the inverter and Wi-Fi module. Download the APP, install it, and refer to the "Wi-Fi Plug Quick Installation Guideline" to set up the network and register. The inverter status will be displayed on the mobile phone APP or computer webpage.
2. GPRS Cloud Communication (Option): Use the supplied communication cable to connect to the inverter and GPRS module. Apply external power to the GPRS module. Download the APP, install it, and refer to the "GPRS RTU Quick Installation Guideline" to set up the network and register. The inverter status will be displayed on the mobile phone APP or computer webpage.
3. Lithium Battery Communication: Communication between the battery and inverter is achieved via the battery communication interface (Baud rate: 9600). Use power cables and communication cables for lithium batteries and inverters. Ensure correct positive and negative connections. 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. Ensure both the lithium battery and inverter are turned off before connecting. It is recommended to install a circuit breaker for the power cables of the lithium battery and the inverter battery interface to prevent sparks.
4. Operation
4.1 Power ON/OFF
Once the unit is properly installed and batteries are connected, simply press the On/Off switch (located on the side of the unit) to turn it on.
4.2 Operation and Display Panel
The front panel of the inverter features an operation and display panel, which includes three indicators, four function keys, and an LCD display. This panel shows the operating status and input/output power information.
LED Indicators:
| Indicator | Color | Status | Message |
|---|---|---|---|
| INV/AC | Green | Solid On | Output is powered by utility in Line mode. |
| Flashing | Output is powered by battery or PV in battery mode. | ||
| CHG | Green | Solid On | Battery is fully charged. |
| Flashing | Battery is charging. | ||
| FAULT | Red | Solid On | Fault occurs in the inverter. |
| Flashing | Warning condition occurs in the inverter. |
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 |
4.3 LCD Display Icons
The LCD displays various icons to indicate system status, input sources, output information, battery status, load status, and operational modes. Key icons include:
- Input Source Information: Icons for AC input, PV input, and numerical display for input voltage, frequency, PV voltage, charger current/power, and battery voltage.
- Configuration Program and Fault Information: Icons for setting programs, warning codes, and fault codes.
- Output Information: Numerical display for output voltage, frequency, load percent, load in VA, load in Watt, and discharging current.
- Battery Information: Icon representing battery status.
- Load Information: Icon for overload.
- Mode Operation Information: Icons indicating connection to mains, PV panel, load supplied by utility, utility charger circuit working, and DC/AC inverter circuit working.
- Mute Operation: Icon indicating unit alarm is disabled.
4.4 LCD Setting
To enter setting mode, press and hold the ENTER button for 3 seconds. Use the "UP" or "DOWN" buttons to select programs, and "ENTER" to confirm or "ESC" to exit.
Key configurable settings include:
- Output source priority (Program 01): Configure whether utility, solar, or SBU (Solar-Battery-Utility) has priority for powering loads.
- Maximum charging current (Program 02): Set the total charging current for solar and utility chargers.
- AC input voltage range (Program 03): Select between Appliance (wide range) or UPS (narrower range) modes.
- Battery type (Program 05): Select battery type (AGM, Flooded, User-Defined, or specific Lithium battery communication protocols like LIB, LIC, LIP, LIL).
- Auto restart when overload/over temperature occurs (Programs 06, 07): Enable or disable automatic restart.
- Output frequency (Program 09): Set to 50Hz or 60Hz.
- Output voltage (Program 10): Set to 220V, 230V, or 240V.
- Maximum utility charging current (Program 11): Limit the charging current from the utility.
- Setting voltage point back to utility source (Program 12): Define the battery voltage percentage at which the system switches back to utility when in SBU or Solar First priority.
- Setting voltage point back to battery mode (Program 13): Define the battery voltage percentage at which the system switches back to battery mode.
- Charger source priority (Program 16): Configure whether solar, solar and utility, or only solar is used for charging.
- Alarm control (Program 18): Enable or disable audible alarms.
- Auto return to default display screen (Program 19): Configure display behavior.
- Backlight control (Program 20): Turn backlight on or off.
- Beeps while primary source is interrupted (Program 22): Enable or disable beeps.
- Overload bypass (Program 23): Enable or disable transfer to line mode during overload in battery mode.
- Record Fault code (Program 25): Enable or disable fault code recording.
- Bulk charging voltage (Program 26): Set the Constant Voltage (C.V) for bulk charging.
- Floating charging voltage (Program 27): Set the voltage for floating charge.
- Low DC cut-off voltage (Program 29): Set the minimum DC voltage before the inverter shuts off.
- Battery equalization (Program 30): Enable or disable battery equalization.
- Battery equalization voltage (Program 31): Set the voltage for battery equalization.
- Battery equalized time (Program 33): Set the duration for equalization.
- Battery equalized timeout (Program 34): Set the maximum time for equalization.
- Equalization interval (Program 35): Set the frequency of equalization.
- Equalization activated immediately (Program 36): Activate equalization immediately.
- GRID-tie operation (Program 37): Select Off-grid or Hybrid mode.
- GRID-tie current (Program 38): Set the current for grid-tie operation.
- Led pattern light (Program 39): Control LED indicator behavior.
- Dual output (Program 41): Enable or disable dual output.
- Enter the dual output functional voltage point (Program 42): Set the voltage point for dual output.
- BMS Communication address 48-70 setting (Program 43): Configure BMS communication address.
- Delayed grid access (Program 44): Enable or disable delayed grid access.
- Maximum Second Load (Program 45): Set the maximum load for the second output channel.
4.5 Operating Mode Description
The inverter operates in various modes, each with specific characteristics:
- Standby Mode: Inverter is on but not actively supplying power or charging.
- Line Mode: Utility power is available and supplying loads, potentially charging batteries.
- Grid-Tie Operation: Inverter is connected to the grid, either in Off-grid (standalone) or Hybrid (grid-connected with battery backup) mode.
- Battery Mode: Inverter is drawing power from batteries to supply loads.
- LIC (Lithium Battery Communication - PACE 232 BMS): Specific mode for communication with PACE 232 BMS lithium batteries.
- LIP (Lithium Battery Communication - PACE 485 BMS): Specific mode for communication with PACE 485 BMS lithium batteries.
- LIL (Lithium Battery Communication - PYLON 485 BMS): Specific mode for communication with PYLON 485 BMS lithium batteries.
4.6 Battery Equalization
Battery equalization is a function designed to reverse the buildup of negative chemical effects like stratification and to remove sulfate crystals from battery plates. This process helps maintain overall battery capacity and prolong battery life.
How to Apply Equalization:
- Enable battery equalization in LCD setting program 30.
- Set the equalization interval in program 35, or activate equalization immediately in program 36.
When to Equalize: Equalization occurs when the set interval is reached or when activated immediately. The controller will enter the Equalize stage from the float stage.
Equalize Charging Time and Timeout: During equalization, the controller charges the battery until it reaches the equalization voltage. It then maintains this voltage for the set equalized time. If the battery doesn't reach the equalization voltage within the timeout period, the controller will stop equalization and return to the float stage.
4.7 Mains and Lithium Battery Activation Function
- After 90 seconds of mains power connection, the inverter connects to the mains and begins operation.
- If the inverter is in lithium battery mode (Program 05 set to LIP or LIL) and the mains are connected but the battery is not, the mains activation function is automatically enabled.
5. Maintenance
5.1 Clearance and Maintenance for Anti-Dust Kit
The inverter comes with a factory-installed anti-dust kit. This kit helps protect the inverter from dust and enhances reliability. The inverter automatically detects the kit and adjusts internal temperature using a thermal sensor.
Maintenance Steps:
- Loosen the screw on the top of the inverter in a counterclockwise direction.
- Remove the dustproof case and take out the air filter foam.
- Clean the air filter foam and the dustproof case.
- After cleaning, re-assemble the dust-kit back into the inverter.
NOTICE: The anti-dust kit should be cleaned from dust every one month.
6. Troubleshooting
Refer to the table below for common problems, possible causes, and solutions.
| 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. Internal fuse tripped. | 1. Contact repair center for replacing the fuse. 2. Re-charge battery. 3. Replace battery. |
| Mains exist but the unit works in battery mode. | Input voltage is displayed as 0 on the LCD and green LED is flashing. | Input 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) | |
| Green LED is flashing. | Set "Solar First" as the priority of output source. | Change output source priority to Utility first. | |
| When the unit is turned on, internal relay is switched on and off repeatedly. | LCD display and LEDs are flashing | 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. | |
| Fault code 02 | Temperature of internal converter component is over 120°C. Internal temperature of inverter component is over 100°C. | Check whether the air flow of the unit is blocked or whether the ambient temperature is too high. | |
| Fault code 03 | Battery is over-charged. The battery voltage is too high. | Return to repair center. 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. |
7. Specifications
7.1 Line Mode Specifications
| Parameter | 3.6KW | 4.2KW | 6.2KW |
|---|---|---|---|
| Input Voltage Waveform | Sinusoidal (utility or generator) | ||
| Nominal Input Voltage | 230Vac | ||
| Low Loss Voltage | 170Vac±7V (UPS); 90Vac±7V (Appliances) | ||
| Low Loss Return Voltage | 180Vac±7V (UPS); 100Vac±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 | Circuit Breaker | ||
| Efficiency (Line Mode) | >95% (Rated R load, battery full charged) | ||
| Transfer Time | 10ms typical (UPS); 20ms typical (Appliances) | ||
7.2 Inverter Mode Specifications
| Parameter | 3.6KW | 4.2KW | 6.2KW |
|---|---|---|---|
| Rated Output Power | 3.6KW | 4.2KW | 6.2KW |
| Output Voltage Waveform | Pure Sine Wave | ||
| Output Voltage Regulation | 230Vac±5% | ||
| Output Frequency | 50Hz | ||
| Peak Efficiency | 93% | ||
| Overload Protection | 3s@≥150% load; 5s@101%~150% load | ||
| Surge Capacity | 2* rated power for 5 seconds | ||
| Nominal DC Input Voltage | 24Vdc | 48Vdc | |
| Cold Start Voltage | 23.0Vdc | 46.0Vdc | |
| Low DC Warning Voltage @ load < 50% | 22.0Vdc | 44.0Vdc | |
| Low DC Warning Voltage @ load ≥ 50% | 21.0Vdc | 42.0Vdc | |
| Low DC Warning Return Voltage @ load < 50% | 22.5Vdc | 45.0Vdc | |
| Low DC Warning Return Voltage @ load ≥ 50% | 22.0Vdc | 44.0Vdc | |
| Low DC Cut-off Voltage @ load < 50% | 20.5Vdc | 41.0Vdc | |
| Low DC Cut-off Voltage @ load ≥ 50% | 20.0Vdc | 40.0Vdc | |
| High DC Recovery Voltage | 32Vdc | 62Vdc | |
| High DC Cut-off Voltage | 33Vdc | 63Vdc | |
| No Load Power Consumption | 30W | 35W | 50W |
7.3 Two Load Output Power
| Parameter | 3.6KW | 4.2KW | 6.2KW |
|---|---|---|---|
| Full Load | 3600W | 4200W | 6200W |
| Maximum Main Load | 3600W | 4200W | 6200W |
| Second Load Range | 720W~2520W | 840W~2940W | 1240W~4340W |
| Main Load Cut Off Voltage | 26VDC | 52VDC | |
| Main Load Return Voltage | 27VDC | 54VDC | |
7.4 Charge Mode Specifications
| Parameter | 3.6KW | 4.2KW | 6.2KW |
|---|---|---|---|
| Utility Charging Mode | |||
| Charging Algorithm | 3-Step | ||
| AC Charging Current (Max) | 100Amp (@VI/P=230Vac) | ||
| Bulk Charging Flooded Battery Voltage | 29.2 | 58.4 | |
| Bulk Charging AGM / Gel Battery Voltage | 28.2 | 56.4 | |
| Floating Charging Voltage | 27Vdc | 54Vdc | |
| MPPT Solar Charging Mode | |||
| Max. PV Array Power | 6200W | 6500W | |
| Nominal PV Voltage | 240Vdc | 360Vdc | |
| PV Array MPPT Voltage Range | 60Vdc~500Vdc | ||
| Max. PV Array Open Circuit Voltage | 500Vdc | ||
| Max Charging Current (AC charger plus solar charger) | 120Amp | 120Amp | 120Amp |
7.5 Grid-Tie Operation
| Parameter | 3.6KW | 4.2KW | 6.2KW |
|---|---|---|---|
| Nominal Output Voltage | 220/230/240 VAC | ||
| Feed-in Grid Voltage Range | 195~253VAC | ||
| Feed-in Grid Frequency Range | 50±1Hz/60±1Hz | ||
| Nominal Output Current | 15.7A | 18.2A | 26.9A |
| Power Factor Range | >0.99 | ||
| Maximum Conversion Efficiency (DC/AC) | 97% | ||
7.6 General Specifications
| Parameter | 3.6KW | 4.2KW | 6.2KW |
|---|---|---|---|
| Safety Certification | CE | ||
| Operating Temperature Range | -10°C to 50°C | ||
| Storage temperature | -15°C~60°C | ||
| Humidity | 5% to 95% Relative Humidity (Non-condensing) | ||
| Dimension (D*W*H), mm | 358×442×116 | ||
| Net Weight, kg | 8.0 | 8.0 | 8.9 |
8. User Tips
- Always ensure all connections (battery, AC, PV) are secure and correctly polarized before powering on the inverter.
- Regularly monitor the LCD display for any warning or fault codes to ensure optimal system performance and address issues promptly.
- Perform monthly cleaning of the anti-dust kit to maintain proper airflow and prevent overheating.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your original seller or the ANERN customer service department. Keep your purchase records handy for faster assistance.