1. Introduction
This manual provides comprehensive instructions for the assembly, installation, operation, and troubleshooting of the Anern Hybrid Solar Inverter models AN-SCI-ECO-2000 and AN-SCI-ECO-3200. Please read this manual carefully before installation and operation, and keep it for future reference.
This multi-function inverter/charger combines 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 such as battery charging current, AC/solar charger priority, and acceptable input voltage ranges for various applications.
1.1 Key Features
- Pure sine wave output.
- Configurable input voltage range for home appliances and personal computers.
- Configurable battery charging current.
- Configurable AC/Solar Charger priority.
- Compatible with mains voltage or generator power.
- Auto restart function upon AC recovery.
- Multiple protections: Overload, Over temperature, Short circuit.
- Smart battery charger design for optimized battery performance.
- Cold start function.
- WIFI/GPRS (Optional).
- Can connect to lithium batteries.
- Off-grid seamless switching: Enables millisecond-level (ms) rapid transition to off-grid (V/F) during sudden grid interruptions, ensuring power supply continuity via batteries or photovoltaic systems.
- Coordinated control of multiple energy sources, integrating solar panel, battery, and diesel generators. The system's energy flow adheres to a clear priority principle to maximize clean energy utilization while ensuring power supply reliability.
- Seamless low-temperature operation: The inverter boasts significant technical advantages in handling extreme temperatures, effortlessly adapting to harsh conditions ranging from -15°C cold to 60°C scorching heat, ensuring stable and efficient power supply.
- Grid adaptability: The inverter maintains stable operation under grid voltage fluctuations, ensuring both its safety and resistance to such disturbances, thereby extending the service life of electrical equipment.
1.2 Basic System Architecture
The inverter/charger integrates with solar panels, batteries, and can be connected to a generator or utility grid to form a complete power system. It is designed to power various home and office appliances, including motor-type loads like tube lights, fans, refrigerators, and air conditioners.
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, follow required specifications to select appropriate cable size.
- 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, which could cause an explosion.
- Strictly follow installation procedures when disconnecting AC or DC terminals. Refer to the Installation section for details.
- One 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. Comply with local requirements and regulations.
- NEVER cause AC output and DC input short circuits. Do NOT connect to the mains when DC input short circuits.
- Warning!! Only qualified service persons are able to service this device. If errors persist after troubleshooting, send the inverter/charger back to a local dealer or service center.
3. Product Overview
3.1 Components
- LCD display
- Status indicator
- Charging indicator
- Fault indicator
- Function buttons (ESC, UP, DOWN, ENTER)
- Power on/off switch
- AC input
- AC output
- PV input
- Battery input
- RS-232 communication port
4. Setup and Installation
4.1 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 inverter unit x 1
- User manual x 1
4.2 Preparation
Before connecting all wirings, remove the bottom cover by unscrewing two screws.
4.3 Mounting the Unit
Consider the following points before 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 reading of the LCD display.
- Allow approximately 20 cm clearance to the sides and 50 cm above and below for proper air circulation and heat dissipation.
- Ambient temperature should be between 0°C and 55°C for optimal operation.
- The recommended installation position is vertically on the wall.
- Ensure sufficient space for heat dissipation and wiring.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.
Mount the unit by screwing two M4 or M5 screws.
4.4 Battery Connection
CAUTION:
- Install a separate DC over-current protector or disconnect device between the battery and inverter.
- All wiring must be performed by qualified personnel.
- Use appropriate cable for battery connection to reduce risk of injury.
Recommended battery cable sizes:
| Model | Wire Size | Cable (mm²) | Torque value (max) |
|---|---|---|---|
| 2.0KVA 12V | 1 x 4AWG | 22 | 2 Nm |
| 3.2KVA 24V | 1 x 6AWG | 14 | 2 Nm |
Steps for battery connection:
- Remove 18 mm of insulation sleeve from positive and negative conductors.
- Suggest using bootlace ferrules on the ends of positive and negative wires with a proper crimping tool.
- Connect all battery packs as shown in the diagram below.
- Insert battery wires into inverter battery connectors and tighten bolts with a torque of 2 Nm. Ensure correct polarity (+ to + and - to -).
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, ensure positive (+) is connected to positive (+) and negative (-) to negative (-).
4.5 AC Input/Output Connection
CAUTION:
- Install a separate AC breaker between the inverter and AC input power source. Recommended spec: 10A for 2.0KVA and 32A for 3.2KVA.
- Do NOT mis-connect input and output connectors.
- All wiring must be performed by qualified personnel.
- Use appropriate cable for AC input connection.
Suggested cable requirement for AC wires:
| Model | Gauge | Torque Value |
|---|---|---|
| 2.0KVA 12V | 14 AWG | 0.5~0.6Nm |
| 3.2KVA 24V | 12 AWG | 1.2 Nm |
Steps for AC input/output connection:
- Before making AC input/output connection, 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 (Ground: yellow-green, L: brown or black, N: blue) and tighten terminal screws. Connect PE protective conductor first.
- Insert AC output wires according to polarities (L: brown or black, N: blue) and tighten terminal screws.
WARNING: Ensure AC power source is disconnected before hardwiring to the unit.
4.6 PV Connection
CAUTION: Install a separate DC circuit breaker between the inverter and PV modules.
WARNING: All wiring must be performed by qualified personnel. Use appropriate cable for PV module connection.
Recommended PV module cable size: 1x16AWG for both models, with a torque value of 1.2 Nm.
PV Module Selection Parameters:
- Open circuit Voltage (Voc) of PV modules must not exceed the max. PV array open circuit voltage of the inverter (400Vdc).
- Open circuit Voltage (Voc) of PV modules should be higher than the min. battery voltage.
Steps for PV module connection:
- Remove 10 mm of insulation sleeve for positive and negative conductors.
- Suggest using bootlace ferrules on the ends of positive and negative wires.
- Check correct polarity of wire connection from PV modules and PV input connectors. Connect positive pole (+) to positive pole (+) and negative pole (-) to negative pole (-). Recommended tool: 4mm blade screwdriver.
CAUTION: Appliances like air conditioners require 2-3 minutes to restart. If power is interrupted and recovers quickly, it can damage connected appliances. Check if your air conditioner has a time-delay function. Otherwise, the inverter's overload fault protection may still not prevent internal damage to the appliance.
4.7 Final Assembly
After connecting all wirings, replace the bottom cover by screwing in the four screws.
5. Operating Instructions
5.1 Power ON/OFF
Once the unit is properly installed and batteries are connected, simply press the On/Off switch (located on the bottom of the case) to turn on the unit.
5.2 Operation and Display Panel
The front panel features an LCD display, three indicators (Status, Charging, Fault), and four function keys (ESC, UP, DOWN, ENTER) to show operating status and input/output power information.
| LED Indicator | Color | State | Message |
|---|---|---|---|
| AC / INV | 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 Key Descriptions:
- ESC: To exit setting mode.
- UP: To go to previous selection.
- DOWN: To go to next selection.
- ENTER: To confirm selection in setting mode or enter setting mode.
5.3 LCD Display Icons
The LCD displays various information including input source, configuration, fault codes, output information, and battery status. Refer to the manual for detailed icon descriptions.
5.4 LCD Settings
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:
- Program 00: Exit setting mode.
- Program 01: Output source priority (Utility first, Solar first, SBU priority).
- Program 02: Maximum charging current (10A, 20A, 30A, 40A, 50A, 60A, 70A, 80A).
- 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/enable).
- Program 07: Auto restart when over temperature occurs (Restart disable/enable).
- Program 09: Output frequency (50Hz, 60Hz).
- Program 10: Output voltage (220V, 230V, 240V).
- Program 11: Maximum utility charging current (2A to 60A).
- Program 12: Setting voltage point back to utility source (various voltage options for 12V and 24V models).
- Program 13: Setting voltage point back to battery mode (various voltage options for 12V and 24V models).
- Program 16: Charger source priority (Solar first, Solar and Utility, Only Solar).
- Program 18: Alarm control (Alarm on/off).
- Program 19: Auto return to default display screen (Enable/disable).
- Program 20: Backlight control (Backlight on/off).
- Program 22: Beeps while primary source is interrupted (Alarm on/off).
- Program 23: Overload bypass (Bypass disable/enable).
- Program 25: Record Fault code (Record enable/disable).
- Program 26: Bulk charging voltage (C.V voltage).
- Program 27: Floating charging voltage.
- Program 29: Low DC cut-off voltage.
- Program 30: Battery equalization (Enable/disable).
- Program 31: Battery equalization voltage.
- Program 33: Battery equalized time.
- Program 34: Battery equalized timeout.
- Program 35: Equalization interval.
- Program 36: Equalization activated immediately.
5.5 Display Settings
Pressing the UP or DOWN key cycles through various display information: input voltage, input frequency, PV voltage, charging current, charging power, battery voltage, output voltage, output frequency, load percentage, load in Watt, load in VA, DC discharging current, and main CPU Version.
5.6 Operating Mode Description
The inverter operates in several modes, each with specific behaviors:
- Standby Mode / Power Saving Mode: The unit does not provide output 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, both 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 can also supply power to loads and charge the battery simultaneously.
- Fault Mode: Errors caused by internal circuit issues or external factors (e.g., over temperature, output short circuit). PV energy and utility can still charge batteries.
5.7 Battery Equalization Description
Battery equalization reverses the buildup of negative chemical effects like stratification and removes sulfate crystals, which can reduce battery capacity. It is recommended to equalize batteries periodically.
To apply equalization:
- Enable battery equalization in LCD setting program 30.
- Set equalization interval in program 35, or activate immediately in program 36.
6. Maintenance
6.1 Anti-Dust Kit Clearance and Maintenance (Optional)
The inverter comes with a pre-installed anti-dust kit that helps maintain internal temperature and increases product reliability. The inverter automatically detects this kit and adjusts internal thermal sensors.
Maintenance steps:
- Remove the screws securing the dustproof case.
- Remove the dustproof case and take out the air filter foam.
- Clean the air filter foam and dustproof case.
- Re-assemble the dust-kit back to the inverter.
NOTICE: The anti-dust kit should be cleaned from dust every one month.
7. Troubleshooting
This section provides solutions for common problems. If issues persist, contact a qualified service person or return the unit to a dealer.
| Problem | LCD/LED/Buzzer | Explanation / Possible cause | What to do |
|---|---|---|---|
| Unit shuts down automatically during startup process. | LCD/LEDs and buzzer active for 3 seconds then off. | Battery voltage is too low (<1.91V/Cell). | 1. Re-charge battery. 2. Replace battery. |
| No response after power on. | No indication. | 1. Battery voltage is far too low (<1.4V/Cell). 2. Internal fuse tripped. | 1. Contact repair center for fuse replacement. 2. Re-charge battery. 3. Replace battery. |
| Input voltage displayed as 0 on LCD, green LED flashing. | Input protector is tripped. | Check if AC breaker is tripped and AC wiring is connected well. | |
| Mains exist but unit works in battery mode. | 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 priority of output source. | Change output source priority to Utility first. | |
| When unit is turned on, internal relay switches on and off repeatedly. | LCD display and LEDs are flashing. | Battery is disconnected. | Check if battery wires are connected well. |
| Fault code 07 | Overload error. 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 air flow is blocked or ambient temperature is too high. | |
| Buzzer beeps continuously and red LED is on. | Fault code 03 | Battery is over-charged. Battery voltage is too high. | Check if spec and quantity of batteries meet requirements. |
| Fault code 01 | Fan fault. | Replace the fan. | |
| Fault code 06/58 | Output abnormal (Inverter voltage below 190Vac or 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 error happens again, return to repair center. | |
| Fault code 52 | Bus voltage is too low. | Restart the unit. If error happens again, return to repair center. | |
| Fault code 55 | Output voltage is unbalanced. | Restart the unit. If error happens again, return to repair center. |
7.1 Warning Indicator
| Warning Code | Warning Event | Audible Alarm | Icon flashing |
|---|---|---|---|
| 01 | Fan is locked when inverter is on. | Beep three times every second | DIA |
| 03 | Battery is over-charged | Beep once every second | 03 |
| 04 | Low battery | Beep once every second | 04 |
| 07 | Overload | Beep once every 0.5 second | 07 |
| 10 | Output power derating | Beep twice every 3 seconds | 10 |
| 15 | PV energy is low. | Beep twice every 3 seconds | 15 |
| E9 | Battery equalization | None | E9 |
8. Specifications
8.1 Line Mode Specifications
| INVERTER MODEL | 2.0KVA-12V | 3.2KVA-24V |
|---|---|---|
| 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) | |
8.2 Inverter Mode Specifications
| INVERTER MODEL | 2.0KVA-12V | 3.2KVA-24V |
|---|---|---|
| Rated Output Power | 2000VA/1600W | 3200VA/3000W |
| Output Voltage Waveform | Pure Sine Wave | |
| Output Voltage Regulation | 230Vac±5% | |
| Output Frequency | 50Hz | |
| Peak Efficiency | 94% | |
| Overload Protection | 5s@ ≥150% load; 10s@ 100% ~ 150% load | |
| Surge Capacity | 2* rated power for 5 seconds | |
| Nominal DC Input Voltage | 12Vdc | 24Vdc |
| Cold Start Voltage | 11.5Vdc | 23.0Vdc |
| Low DC Warning Voltage @ load < 50% | 11.0Vdc | 22.0Vdc |
| Low DC Warning Voltage @ load ≥ 50% | 10.5Vdc | 21.0Vdc |
| Low DC Warning Return Voltage @ load < 50% | 11.5Vdc | 22.5Vdc |
| Low DC Warning Return Voltage @ load ≥ 50% | 11.0Vdc | 22.0Vdc |
| Low DC Cut-off Voltage @ load < 50% | 10.2Vdc | 20.5Vdc |
| Low DC Cut-off Voltage @ load ≥ 50% | 9.6Vdc | 20.0Vdc |
| High DC Recovery Voltage | 14.0Vdc | 32Vdc |
| High DC Cut-off Voltage | 16.0Vdc | 33Vdc |
| No Load Power Consumption | <25W | <35W |
8.3 Charge Mode Specifications
Utility Charging Mode
| INVERTER MODEL | 2.0KVA-12V | 3.2KVA-24V |
|---|---|---|
| Charging Algorithm | 3-Step | |
| AC Charging Current (Max) | 60Amp (@V1/p= 230Vac) | |
| Bulk Charging Voltage (Flooded Battery) | 14.6 | 29.2 |
| Bulk Charging Voltage (AGM / Gel Battery) | 14.1 | 28.2 |
| Floating Charging Voltage | 13.5Vdc | 27Vdc |
MPPT Solar Charging Mode
| INVERTER MODEL | 2.0KVA-12V | 3.2KVA-24V |
|---|---|---|
| Max. PV Array Power | 2000W | 3000W |
| Nominal PV Voltage | 240Vdc | |
| PV Array MPPT Voltage Range | 30~400Vdc | |
| Max. PV Array Open Circuit Voltage | 400Vdc | |
| Max Charging Current (AC charger plus solar charger) | 80Amp | |
8.4 General Specifications
| INVERTER MODEL | 2.0KVA-12V | 3.2KVA-24V |
|---|---|---|
| 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 | 357X273X95 | |
| Net Weight, kg | 4.4 | 5.4 |
9. User Tips
Based on common user inquiries and feedback, here are some tips for optimal use:
- Inductive Loads: When connecting inductive loads (e.g., refrigerators, air conditioners, pumps), ensure the inverter's rated power is at least three times the starting power of the appliance to prevent damage.
- Wiring Safety: Always connect circuits correctly and install appropriate switches for each circuit. Never connect or disconnect lines when power is applied.
- 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 load, PV, and mains, then turn off the inverter, and finally turn off the battery.
- PV Panel Voltage: For optimal performance, ensure the PV panel's open circuit voltage meets the inverter's requirements. For example, for a 3.5KW inverter, the max PV array open circuit voltage is 500Vdc, and the optimal connection voltage is 300Vdc-400Vdc.
- Circuit Breakers: Always install circuit breakers for all lines (solar panel, battery, mains, and inverter) to ensure safety.
10. Warranty and Support
For service or repair, please contact your local dealer or an authorized service center. Only qualified personnel should service this device.
A user manual in PDF format is available for download and further reference. This document contains detailed item guides and specifications. (Referenced PDF: User manual (PDF))
For any questions or further assistance, please consult our customer staff.