1. Introduction
This manual provides comprehensive instructions for the assembly, installation, operation, and maintenance of the ANERN Hybrid Solar Inverter. Please read this manual carefully before proceeding with any installations or operations to ensure proper functioning and safety.
1.1 Product Overview
The ANERN Hybrid Solar Inverter is a multifunctional device integrating an MPPT solar charge controller, a high-frequency pure sine wave inverter, and a UPS function module. It is designed for off-grid backup power and self-consumption applications and can operate with or without batteries. The system requires additional components such as PV modules, a generator, or a utility grid for complete functionality. Some models include a built-in or plug-and-play WiFi module for remote monitoring via mobile app or website.
Figure 1: ANERN Hybrid Solar Inverter (FGI-S6500/S12000) with key specifications.
Figure 2: Typical Solar Energy Storage System Diagram.
1.2 Target Group
This document is intended for qualified persons and end-users. Tasks not requiring specific qualifications can be performed by end-users. Qualified persons should possess knowledge of inverter operation, risks associated with electrical devices, installation and commissioning of electrical systems, applicable standards, and safety information.
1.3 Safety Instructions
Adherence to safety instructions is crucial for personal safety and proper product function. Please observe all warnings and cautions.
- WARNING! A high level of potential danger, which, if not avoided, could result in death or serious injury to personnel.
- CAUTION! A moderate or low level of potential danger, which, if not avoided, could result in moderate or minor injuries to personnel. In some bad situations, it could result in death or serious injury to personnel.
General Safety Guidelines:
- Ensure correct battery system type (lithium or lead-acid) is selected to prevent system malfunction.
- Read all instructions and cautionary markings on the unit and batteries before use.
- All electrical installations must comply with local electrical safety standards.
- When installing PV modules during the daytime, cover them with opaque materials to avoid high terminal voltage.
- Only charge deep-cycle lead-acid or lithium rechargeable batteries. Other battery types may burst.
- Do not disassemble the unit. Refer servicing to qualified personnel.
- Disconnect all wiring before maintenance or cleaning. Turning off the unit alone does not eliminate electrical shock risk.
- NEVER charge a frozen battery.
- Follow recommended cable sizes for optimal operation.
- Exercise caution with metal tools near batteries to prevent short circuits or explosions.
- Strictly follow installation procedures for disconnecting AC or DC terminals.
- The inverter must be connected to a permanent grounded wiring system, complying with local regulations.
- NEVER short circuit AC output and DC input. Do NOT connect to mains with DC input short circuits.
- Ensure the inverter is completely assembled before operation.
Labels on Inverter:
| Symbol | Description |
|---|---|
| ⚠ CAUTION | Do not disconnect under load! |
| ⚠ Danger: High Voltage! | Danger: Electrical Hazard! |
| ⏱ 5min | Start maintaining the INVERTER at least 5 minutes after the INVERTER disconnected from all external power supplies. |
| 📖 | Read instructions carefully before performing any operation on the INVERTER. |
| ␣ | Grounding: The system must be firmly grounded for operator safety. |
2. Setup (Installation)
2.1 Unpacking and Inspection
Upon receiving the product, inspect the outer packaging for any damage. Open the box and check if the internal equipment is intact. If any damage is found, contact your local distributor. Products are strictly tested before leaving the factory.
Installation Tools:
- Multi-meter
- Protective gloves
- Insulated anti-smashing shoes
- Safety glasses
- ESD wrist strap
- Hammer drill
- Electric screwdriver
- Cross screwdriver
- Rubber mallet
- Spirit level
- Wire cutter / stripper
- Terminal crimping tool
2.2 Mounting Unit
Consider the following points for installation location:
- Do not mount on flammable construction materials.
- Mount on a solid, non-combustible surface (e.g., concrete).
- Install at eye level for easy LCD display reading.
- Ambient temperature should be between -10°C and 60°C.
- Mount vertically on the wall.
- Ensure sufficient space (at least 30cm clearance on top, bottom, and sides) for heat dissipation and wiring access.
Figure 3: Inverter Mounting Clearance (Refer to manual for diagram).
Mounting Steps:
- Use an ⌀8 drilling bit to drill holes on the mounting surface, 110mm apart. Insert expansion screw tubes (M6 expansion screws suggested).
- Align the inverter's top screw holes with the installed expansion screw tubes and fix the inverter to the wall.
- Before connecting wiring, remove the bottom cover by unscrewing four screws.
2.3 AC Input / Output Connection
CAUTION! Install a separate AC breaker (recommended 80A) between the inverter and the AC input power source. Do not mis-connect input and output connectors. Ensure correct AC cable polarity (L and N) to prevent short circuits.
WARNING! All wiring must be performed by qualified personnel. Use appropriate cable sizes to ensure system safety and efficient operation.
Recommended AC Input Wires:
| Gauge | Cable (mm²) |
|---|---|
| 6 AWG | 13.3 |
Recommended AC Output Wires:
| Terminal | Gauge | Cable (mm²) |
|---|---|---|
| AC OUT1 (Max current is 70A) | 6 AWG | 13.3 |
| AC OUT2 (Max current is 40A) | 10 AWG | 5.26 |
WARNING! AC OUT2 terminal cannot be connected with a load current > 40A, or an error will occur. Ensure AC power is disconnected before connecting to the unit.
AC Input Connection Steps:
- Open the AC circuit breaker before making connections.
- Remove 12mm insulation from cable ends, shorten conductor to 10mm. Insert into tubular terminal and crimp tightly.
- Insert AC input cables according to polarities (PE: yellow-green, L: brown/black, N: blue) and tighten terminal screws. Connect PE protective cable first.
- Ensure cables are securely connected.
Figure 4: AC Input/Output Terminal Connections (Refer to manual for diagram).
CAUTION! Appliances like air conditioners require a 2-3 minute restart delay to balance refrigerant gas. Ensure your air conditioner has a time-delay function or this inverter may trigger overload faults.
2.4 PV Connection
CAUTION! Install a separate DC circuit breaker between the inverter and PV modules. Do not ground positive or negative PV module terminals, as this can severely damage the inverter.
WARNING! Exposure to sunlight can generate lethal high voltages. Connect PV terminals to corresponding ports; reversing polarity can damage the inverter. All wiring must be performed by qualified personnel. Use appropriate cable sizes.
Recommended PV Module Wires:
| Gauge | Cable (mm²) |
|---|---|
| 10 AWG | 5.26 |
PV Module Selection Parameters:
- Open circuit Voltage (Voc) of PV modules must not exceed max. PV array open circuit voltage of inverter (500Vdc).
- Open circuit Voltage (Voc) of PV modules should be higher than start-up voltage (80Vdc).
- PV Array MPPT Voltage Range: 60Vdc~450Vdc.
PV Module Connection Steps:
- Open the DC circuit breaker before making PV connections.
- Remove 12mm insulation from cable ends, shorten conductor to 10mm. Insert into tubular terminal and crimp tightly.
- Use a multi-meter to check polarities (+ → PV+ (red), - → PV- (black)).
- Insert PV cables according to polarities and tighten terminal screws.
- Ensure cables are securely connected.
- PV1 and PV2 can be connected to different panel strings. If connected to the same string, set program 62 to enable PV parallel mode.
Figure 5: PV Terminal Connections (Refer to manual for diagram).
2.5 Battery Connection
The inverter supports 48V nominal voltage lead-acid (AGM or FLD) and lithium batteries.
CAUTION! Install a separate DC over-current protector or disconnect device (recommended 250A) between the battery and inverter.
WARNING! All wiring must be performed by qualified personnel. Use appropriate cable sizes. Ensure AC power is disconnected before connecting batteries. Observe correct polarity. Installation requires care due to high battery voltage.
Recommended Battery Cable and Terminal Size:
| Gauge | Cable (mm²) |
|---|---|
| 000 AWG | 85 |
Note: For lead-acid batteries, the recommended charge current is 0.3C (C ≤ battery capacity).
Lead-acid Battery Connection Steps:
- Unscrew pre-fixed screws on battery poles. Prepare 2 DT terminals.
- Remove 12mm insulation from cable ends, shorten conductor to 10mm. Insert into DT terminal and crimp tightly.
- Pass battery cable through the bottom shell's installation hole and tighten terminal screws. Ensure correct polarity (BAT+ and BAT-) at both the battery and inverter.
- Connect all battery packs as required. A minimum 200Ah capacity battery is suggested.
CAUTION! Do not place anything between the flat part of the inverter terminal and the DT terminal to prevent overheating. Do not apply anti-oxidant substance on terminals before connection. Ensure positive (+) is connected to positive (+) and negative (-) to negative (-) before final DC connection.
Lithium Battery Connection Steps:
Check battery protocol compatibility first. The inverter has two connectors for lithium batteries: an RJ45 port for BMS and a power cable.
- Follow the power cable connection steps for lead-acid batteries (Section 2.5.1).
- Connect the RJ45 terminal of the battery communication cable to the BMS communication port of the inverter. The communication protocol should be RS485 or CAN.
- Insert the other end of the RJ45 cable to the battery's communication port.
Note: If using lithium batteries, ensure the BMS communication cable is connected between the battery and the inverter. For parallel systems, connect the BMS communication cable between the battery and one inverter.
Lithium Battery Communication and Setting:
Set battery type to 'Llb' or 'FEL' in Program 17 (Section 3.3.2). Ensure the lithium battery BMS port connects to the inverter is Pin to Pin. The inverter BMS port pin assignment is as follows:
| Pin number | BMS port |
|---|---|
| 1 | RS485B |
| 2 | RS485A |
| 3 | - |
| 4 | CANH |
| 5 | CANL |
| 6 | - |
| 7 | - |
| 8 | - |
2.6 Meter Connection
The inverter can connect to an external meter at the grid side for accurate grid power and grid-tied function. The inverter's RS485A and RS485B interfaces (part of the BMS interface) are used for meter connection. Ensure the meter model supports the inverter's communication protocol.
2.7 Final Assembly
After connecting all wiring, replace the bottom cover and secure it with the four screws removed earlier.
2.8 Smart Communication Stick Connection (Optional)
The smart communication stick (WiFi) connects to the cloud platform. Insert the stick directly into the COM port. Some models have built-in WiFi monitoring; refer to the solar APP quick configuration guide for setup.
Figure 6: Wi-Fi Monitoring Feature.
3. Operation
3.1 Power ON/OFF
Once the unit is properly installed and batteries are connected, press the ON/OFF switch (located on the bottom of the case) to turn on the unit.
3.2 Operation and Display Panel
The front panel features four indicators, four function keys, and an LCD display for operating status and input/output power information.
Figure 7: Operation and Display Panel.
LED Indicators:
| Indicator | State | Message |
|---|---|---|
| AC (Green) | Solid On | Mains power is normal and in operation. |
| Flashing | Mains power is normal but not yet in operation. | |
| Off | Mains power is abnormal. | |
| Invert (Yellow) | Solid On | Output powered by battery or PV in battery mode. |
| Off | Other states. | |
| Charging (Yellow) | Solid On | Battery is in float charging. |
| Flashing | Battery is in constant voltage charging. | |
| Off | Other states. | |
| Fault (Red) | Solid On | Fault occurs in the inverter. |
| Flashing | Warning condition occurs in the inverter. | |
| Off | Inverter is working properly. |
Function Buttons:
| Button | 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 |
3.3 LCD Display Icons and Information
The LCD displays various icons and information related to battery, AC input, PV input, output, and system parameters. The display cycles through information by pressing UP or DOWN. If no operation for a long time, it defaults to daily PV power generation.
Figure 8: Detailed LCD Display.
Key Display Areas:
- Battery Information: Battery icon, type (AGM, FLD, USER, Li-ion), charging period (CC, CV, FLOAT), voltage, charging/discharging current.
- AC Input Information: UPS/APP input mode, AC input voltage and frequency.
- PV Input Information: PV input icon, PV power, voltage, current (PV1 and PV2 rotate).
- Output Information: Output voltage (V), apparent power (VA/kVA), active power (W/kW), output frequency.
- Battery Capacity: Bar graph indicating charge level.
- Load Capacity: Bar graph indicating load level, overload icon.
- AC OUTPUT2 Information: Second AC output icon, AC output 2 voltage.
- Parameter Query, Function Setting or Fault/Alarm Information: System information, function settings, fault/alarm indicators.
Battery Icon Display in Battery Mode (Lead-acid):
| Load Percentage | Battery Voltage | Display |
|---|---|---|
| Load >50% | < 44.584V | [25%] |
| 44.584 ~ 46.74V | [25%, 50%] | |
| 46.74 ~ 48.896V | [25%, 50%, 75%] | |
| > 48.896V | [25%, 50%, 75%, 100%] | |
| 50% > Load > 20% | < 47.18V | [25%] |
| 47.18 ~ 49.336V | [25%, 50%] | |
| 49.336 ~ 51.492V | [25%, 50%, 75%] | |
| > 51.492V | [25%, 50%, 75%, 100%] | |
| Load < 20% | < 48.48V | [25%] |
| 48.48 ~ 50.636V | [25%, 50%] | |
| 50.636 ~ 52.792V | [25%, 50%, 75%] | |
| > 52.792V | [25%, 50%, 75%, 100%] |
3.4 LCD Settings (Program List)
Press and hold the ENTER button for 2 seconds to enter setting mode. Use UP/DOWN to select programs, then ENTER to confirm or ESC to exit.
| Program | Description | Setting Option |
|---|---|---|
| 01 | Output voltage | 230V (default), adjustable: 220V, 230V, 240V |
| 02 | Output frequency | 50Hz (default), adjustable: 50Hz, 60Hz. Takes effect immediately in standby or grid mode. |
| 03 | Output source priority | Grid first (default), Solar first, MKS (Generator priority) |
| 04 | Input mode | APP (Appliance, default), UPS (Computer/devices), GEN (Generator) |
| 05 | Charger source priority | PNG (PV and Grid, default), OPV (Only PV), PVF (PV first) |
| 06 | Grid charging current | 60A (default), adjustable: 2-160A in steps. |
| 07 | Maximum charging current | 100A (default), adjustable: 2-160A in steps. Follows BMS data if connected. |
| 08 | Menu Default | ON (default): Returns to first page after 1 min inactivity. OFF: Stays on current page. |
| 09 | Auto restart when overload occurs | ON (default) |
| 10 | Auto restart when over temperature occurs | ON (default) |
| 11 | Main input cut warning | ON (default): Buzzer sounds for 5s if grid input lost. OFF: No sound. |
| 12 | Energy-saving mode | OFF (default). ON: In battery mode, if load < 25W/100VA, output stops then resumes. If load > 35W/120VA, continuous output. |
| 13 | Overload transfer to bypass | OFF (default). ON: In PBG/MKS mode, overload immediately transfers to bypass (grid power output). |
| 14 | Silent mode setting | OFF (default). ON: Buzzer silent for alarms/faults. Button sound not affected. |
| 15 | Battery return to grid voltage point | Default 46V (AGM/FLD), 47.6V (LIB/CUS), 48V (FEL). Adjustable range varies by battery type. |
| 16 | Switching back to battery mode voltage points | Default 52V (AGM/FLD), 54.4V (LIB/CUS), 53.2V (FEL). Adjustable range varies by battery type. |
| 17 | Battery type | AGM (default), Flooded, Lithium (Ternary Lithium Battery), FEL (Lithium iron), User-Defined. |
| 18 | Battery low voltage point | Default 44V (AGM/FLD), 47.6V (LIB/CUS), 48V (FEL). Adjustable range varies by battery type. Follows BMS data if connected. |
| 19 | Battery shutdown voltage point | Default 42V (AGM/FLD), 46V (LIB/CUS), 42V (FEL). Adjustable range varies by battery type. Follows BMS data if connected. |
| 20 | Constant voltage mode voltage point setting | Default 56.4V (AGM), 58V (FLD), 56.4V (LIB/CUS), 55.2V (FEL). Adjustable range varies. Must be higher than float charge set point. Follows BMS data if connected. |
| 21 | Floating charge mode voltage point setting | Default 54V (AGM/FLD), 55.2V (CUS/LIB), 54.4V (FEL). Adjustable range varies. Must be lower than constant voltage point. Follows BMS data if connected. |
| 22 | Grid low voltage point setting | APP/GEN mode: 154V (default), range 90-154V. UPS mode: 185V (default), range 170-200V. |
| 23 | Grid high voltage point setting | APP/GEN mode: 264V (default), range 264-280V. UPS mode: Cannot be changed. |
| 24 | Automatic turn off backlight | ON (default): Backlight turns off after 1 min inactivity. |
| 25 | Inverter soft start setting | OFF (default). ON: Output gradually increases. OFF: Output increases directly. Only in single-machine operation mode. |
| 26 | Reset factory setting | Restores all settings to factory defaults. Applied in mains and standby modes. |
| 29 | Battery Disconnection Alarm | OFF (default): No alarm when battery disconnected. |
| 31 | Equalization Voltage Point Setting | 58.4V (default), range [48, 60V]. |
| 32 | Equalization Charging Time Setting | OFF (default). Range [5, 900] minutes, 5 min step. Charges until voltage rises to equalization voltage, then constant voltage. |
| 33 | Equalization Delay Time Setting | 120 minutes (default), range [5, 900] minutes, 5 min step. Extends equalization if voltage not reached. |
| 34 | Equalization Interval Time Setting | 30 days (default), range [1, 90] days, 1 day step. Starts equalization when interval reached during float phase. |
| 35 | Enable Equalization Immediately | OFF (default). ON: Activates equalization immediately during float charging if battery connected. |
| 36 | Grid-tie inverter function | Set whether inverter feeds to grid (INT) or controls feeding power based on meter data (MET). Behavior varies by PGB/GPB/MKS modes. |
| 37 | Max Grid Tie Power | 12.0kW (default), range [0, 12.0]kW, 0.5kW step. Uses electricity meter data if GTI is 'MET'. |
| 38 | Battery dual output low voltage shutdown point | 48V (default), range [44, 60]V. Secondary output turns off if battery voltage drops below set point, turns on if voltage rises +2V per cell. |
| 39 | Battery dual output duration | OFF (default). Range [5, 900] minutes. Secondary output turns off if discharge time reaches set point. FUL for unlimited. |
| 40 | Dual output battery mode cut-off SOC | 20 (default), range [5, 90] and OFF. Secondary output turns off if battery SOC is lower than set value, turns on if SOC is 5% higher. |
| 44 | BMS Communication Function | OFF (default). Set to specific BMS protocol (CVT, PYL, GRO, VOL, IRO, PAC) to communicate with lithium battery BMS. Alarm 56 if abnormal. |
| 45 | BMS ID | Auto (AtO) (default), or numerical [0, 15] (A-F for 10-15). System polls IDs until correct response, then locks. |
| 46 | Low SOC Shutdown | 20 (default), range [5, 50]. Inverter shuts down if lithium battery SOC is low (Alarm 68). Can be set to OFF. |
| 47 | High SOC to Battery | 90 (default), range [10, 100]. In PBG mode, inverter switches to battery mode when lithium battery SOC reaches set value. Can be set to OFF. |
| 48 | Low SOC to Grid | 50 (default), range [10, 90]. In PBG mode, inverter switches to grid mode when lithium battery SOC is low. Can be set to OFF. |
| 61 | Battery Max. Discharge Current | OFF (default). Range [10, 220A], 5A step. Limits discharge current. Fault 14 if overcurrent for 5s. |
| 62 | PV Parallel Mode | OFF (default): PV1/2 connected to different PV strings. ON: PV1/2 connected to same PV string. |
4. Maintenance
Regular maintenance ensures the longevity and optimal performance of your ANERN Hybrid Solar Inverter. Always disconnect all power sources (AC, PV, and Battery) and wait at least 5 minutes before performing any maintenance to avoid electrical hazards.
4.1 General Checks
- Periodically inspect all wiring connections for tightness and signs of corrosion.
- Ensure the inverter's ventilation openings are clear of dust and debris to maintain proper heat dissipation.
- Check the battery terminals for corrosion and clean if necessary.
- Monitor the LCD display for any fault or alarm codes and address them promptly.
4.2 Battery Equalization
The equalization function helps reverse negative chemical effects like stratification and removes sulfate crystals in lead-acid batteries, which can reduce overall capacity. This mode should NOT be activated when using lithium batteries.
How to Apply Equalization Function (Lead-acid batteries only):
You can enable battery equalization via LCD setting Program 32 (setting time) or Program 35 (immediate equalization). Configure the following programs:
- Program 31: Equalization Voltage Point Setting
- Program 32: Equalization Charging Time Setting
- Program 33: Equalization Delay Time Setting
- Program 34: Equalization Interval Time Setting
- Program 35: Immediate Equalization Mode Activation
When to Equalize:
In the float stage, when the set equalization interval is reached, or if immediate equalization is activated, the controller will enter the Equalize stage.
Figure 9: Battery Equalization Charging Cycle (Refer to manual for diagram).
During equalization, the controller charges the battery until it reaches the equalization voltage, then maintains constant voltage. The battery remains in this stage until the set equalization time is reached. If the voltage doesn't rise to the equalization point within the set time, the controller extends the equalization time. If the voltage is still below the equalization voltage after the extended time, the controller stops equalization and returns to the float stage.
5. Troubleshooting
This section provides guidance for identifying and resolving common issues. The inverter indicates problems via fault codes (constant red LED, LCD display code) or alarm codes (flashing red LED, LCD display code).
5.1 Fault Reference Code
If a fault occurs, the fault indicator (red LED) is always on, and the buzzer sounds for 10 seconds then stops. The system attempts to restart automatically. If it fails after six restarts, the machine remains in fault status. Power off the unit completely (off the screen) or wait 15 minutes to restart. Contact the manufacturer for abnormal situations.
Figure 10: Example Fault Display.
Fault Code Sheet:
| Fault Code | Meaning | Relevant Action | Trigger Conditions | Resume Conditions |
|---|---|---|---|---|
| 1 | Bus boost fail | Turn fault mode | Grid soft start process starts but bus voltage does not reach set value | Restore after reaching the set voltage for 15 seconds |
| 2 | Bus over voltage | Turn fault mode | Bus voltage is higher than set value | Restore after reaching the set voltage for 15 seconds |
| 3 | Bus below voltage | Turn fault mode | Bus voltage is lower than set value | Restore after 15 seconds |
| 4 | Battery over current | Turn fault mode | Battery current is higher than set value | Cannot restore |
| 5 | System over temperature | Turn fault mode | Temperature is higher than set value or fan is not connected | Restore after temperature lower than set value and fan connected for 15 minutes |
| 6 | Battery over voltage | Turn fault mode | Battery voltage is higher than set value | Restore after reaching the set voltage for 15 seconds |
| 7 | Bus soft start failed | Turn fault mode | Battery soft start process starts but the bus voltage has not reached set value | Restore after reaching the set voltage for 15 seconds |
| 8 | Bus short circuit | Turn fault mode | Bus voltage is lower than set value | Cannot restore |
| 9 | Inverter soft start failed | Turn fault mode | Inverter soft start process starts but the inverter voltage has not reached set value | Restore after reaching the set voltage for 15 seconds |
| 11 | Inverter under voltage | Turn fault mode | The inverter voltage is lower than the set value in battery mode | Restore after reaching the set voltage for 15 seconds |
| 12 | Inverter short circuit | Turn fault mode | Inverter voltage is less than the set value and current is higher than the set value | Restore after reaching the set voltage for 15 seconds |
| 13 | Inverter negative power | Turn fault mode | The inverter power is negative and exceeds the set value for a period of time | Restore after reaching the set voltage for 15 seconds |
| 14 | Over load | Turn fault mode | The load current is higher than the set value | Restore after reaching the set voltage for 15 seconds |
| 17 | Program updating | Turn fault mode | Inverter updating or OTA | Restore after updating |
| 18 | PV reverse connection | Turn fault mode | PV reverse connection | Restore after connecting correctly for 15 seconds |
| 26 | BMS fault | Turn fault mode | Error code in BMS message. | Restore after BMS fault resolved |
| 29 | Inverter load abnormal | Turn fault mode | Abnormal inverter load leads to abnormal voltage | Restore after voltage returning normal for 15 seconds |
5.2 Alarm Reference Code
If an alarm occurs, the inverter does not enter fault mode. The red LED flashes, and the LCD displays the alarm code. The buzzer sounds every second for 1 minute, then stops.
Figure 11: Example Alarm Display.
Alarm Code Sheet:
| Alarm Code | Meaning | Relevant Action | Trigger Conditions | Resume Conditions |
|---|---|---|---|---|
| 50 | Battery open | Alarm | Battery disconnected for no more than 10 minutes | Restore after battery connected for 2 minutes |
| 51 | Battery under voltage | Alarm, battery low voltage shutdown or cannot power on | Battery voltage is lower than BAU set value | Restore after the battery voltage exceeding the BAU set value by 2V |
| 52 | Battery low voltage | Alarm | Battery voltage is lower than BAL set value | Restore after the battery voltage exceeding the BAL set value by 2V |
| 53 | Battery charge short circuit | Alarm, battery does not charge | Battery voltage is less than 24V and the charging current exists. | Restore after the short circuit is eliminated. |
| 56 | BMS loss | Alarm | Communication failure after BMS communication function is enabled | Restore after communication function disabled or communication success |
| 58 | Fan error | Alarm, fan operation in full speed | No fan speed signal detected | Restore after fan speed signal detected |
| 59 | EEPROM error | Alarm | EEPROM read/write exception | Cannot restore |
| 60 | Overload | Alarm | The mains current/battery discharge current/load power is higher than the rated value. | Restore after the mains current/battery discharge current/load power is less than the rated value. |
| 62 | PV energy weak | Alarm, Turn off the PV output to the load, but keep the PV charging the battery | When the battery is not connected, the bus voltage is lower than the set value | Restore after battery connected or grid connected, or 10 minutes later. |
| 68 | Battery under SOC shutdown | Alarm, turn to standby mode | BMS reports SOC lower than BSU set value | Disable low SOC shutdown function, disable BMS communication, or SOC is higher than set value by 5%. |
| 69 | Battery below SOC warning | Alarm, if it is in standby mode, it will remain in standby mode. | Lithium battery SOC is lower than set value+5% (grid mode or battery mode), lower than set value+10% (standby mode) | Disable low SOC shutdown function, disable BMS communication, or SOC is higher than set value by 10%. |
| 72 | Battery can not startup | Alarm | During standby, battery voltage is lower than the allowed startup voltage | Restore after the battery voltage is higher than the allowed startup voltage |
| 77 | Grid power is unstable | Alarm | Lost of grid power three times within 5 minutes | Restore after 5 mins |
| 78 | Meter Loss | Alarm | When the grid power is connected and the grid connected inverter function is set to Meter, the meter communication is disconnected | Restore after grid is disconnected, or detection device is not set to Meter, or meter communication restore |
5.3 General Troubleshooting
| Problem | Fault Event | Trigger Conditions | What to do |
|---|---|---|---|
| LED screen display fault code 5 | Over temperature | PFC temperature exceeds protection threshold for >20s, or Alarm 58 lasts for >5s. | Check if fan is connected or wiring is loose. If fan not connected for >5 mins, machine reports fault code 5. |
| LED screen display fault code 12 | Inverter short circuit | In battery/standby mode, inverter voltage < 80V and current > 30A, response within 100-120ms. | Check for short circuit at output terminals. Verify inverter voltage and current meet triggering conditions. |
| LED screen display fault code 58 | Fan malfunction | Any fan rotating < 8 times within 2 seconds. | Check fan connection/loose wires. If connected, check fan detection circuit (soldering) or fan itself. |
| Unable to start | Battery | Requires voltage ≥11.5V/N to start in battery mode. Common reasons: improper calibration or insufficient battery voltage. | Check battery voltage sampling and calibration. Use multimeter to measure battery terminals. Configure battery voltage according to model to prevent capacitor explosion. |
| Utility power | Check for short circuits at mains terminal. Check for wiring errors (e.g., mains input to output terminals). | ||
| PV | Check if PV input voltage is too close to critical threshold. For low voltage versions, check main control software compatibility. | ||
| PV not charging | Connecting wrong battery voltage can damage auxiliary power supply on PV side, causing power loss and inability to communicate with main control. |
6. Specifications
The following table outlines the technical specifications for the ANERN Hybrid Solar Inverter.
Figure 12: Model Comparison (FGI-S6500 vs ECO-6200).
| Category | Parameter | Value |
|---|---|---|
| AC Input | Rated Input Voltage (VAC) | 220/230/240; L+N+PE |
| Voltage Range (VAC) | 90~280 (APP mode); 170~280 (UPS mode) | |
| Frequency (Hz) | 50/60 (Auto Adaptive) | |
| AC Output | Rated Capacity (kW) | 12 (Max current of AC output 1 is 70A. Max current of AC output 2 is 40A) |
| Surge Power (kVA) | 24 | |
| Voltage (VAC) | 220/230/240 | |
| Power Factor (PF) | 1 | |
| Frequency (Hz) | 50/60±0.1% | |
| Switch Time (ms) | 10 (APP/UPS mode) / 20 (GEN mode) | |
| WaveForm | Pure Sine Wave | |
| Overload Capacity (Battery Mode) | 1min@ 102%~125% load; 10s@ >125% load | |
| Max. Efficiency (Battery Mode) | 94%@48V | |
| Charger (PV/AC) | Solar Charger Type | MPPT |
| Max PV Input Current/Power | Single PV Input: 27A/9000W; Dual PV Input: 22.5*2A/15000W | |
| MPPT Range@Operating Voltage (VDC) | 60~450 | |
| PV Start-up Voltage | 80Vdc | |
| Max PV Open Circuit Voltage (VDC) | 500 | |
| Max PV Charge Current (A) | 160 | |
| Max AC Charge Current (A) | 160 | |
| Max. Charge Current (PV+AC) (A) | 160 | |
| Battery | Normal Voltage (VDC) | 48 |
| Battery Type | Lithium and Lead-acid | |
| General Data | HMI | LCD |
| Interface | RS232/RS485/CAN | |
| Monitoring | WiFi(Optional) | |
| Ingress Protection | IP21 | |
| Operating Temperature | -10°C~60°C | |
| Relative Humidity | 5%~95% (Non-condensing) | |
| Storage Temperature | -15°C~60°C | |
| Max. Operating Altitude | 4000m (Derating above 1000m) |
Note: Updates to the content and version of this manual will not be notified separately.
7. User Tips
- Battery Charging Algorithm: When using the 'CUS' battery type, carefully review and potentially adjust the charging algorithm settings. Some users have reported discrepancies where the main charging voltage (CV mode) might be set to a point typically used for the next stage (Float mode). Ensure your settings align with your battery manufacturer's recommendations to prevent issues.
- System Monitoring: Utilize the optional WiFi module and mobile app/website monitoring to keep track of your PV system's status, performance, and any alerts in real-time.
- Cable Sizing: Always adhere to the recommended cable sizes for AC input/output, PV, and battery connections to ensure safety and optimal performance. Incorrect cable sizing can lead to inefficiencies or hazards.
- Appliance Compatibility: Be aware that appliances like air conditioners may require a time-delay function for safe operation with the inverter, especially after power interruptions. Consult appliance manufacturers if unsure.
8. Warranty and Support
The ANERN Hybrid Solar Inverter comes with a 2-year warranty.
For technical support, warranty claims, or any questions not covered in this manual, please contact ANERN customer service or your local distributor. When contacting support, please have your product model (FGI-S12000 Series) and any relevant fault/alarm codes ready.
A detailed user manual in PDF format is available for download: ANERN MPPT Solar Inverter User Manual (PDF).