Anern FGI-P6500 6.2KW 48V Hybrid Solar Inverter User Manual

1. Introduction

This manual provides detailed instructions for the assembly, installation, operation, and maintenance of the Anern FGI-P6500 Hybrid Solar Inverter. This multifunctional solar inverter integrates 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 complete system requires additional components such as PV modules, a generator, or a utility grid. A built-in or plug-and-play WiFi module allows users to monitor the PV system status via mobile phone or website.

Figure 1: Anern FGI-P6500 Hybrid Solar Inverter. This image shows the main product unit with its display and key specifications like 6.5KW, 48Vdc, Parallel Inverter, and 220V/230V/240Vac output.

Safety Instructions

Read and keep this manual for future reference. Adhere to all warnings and cautionary markings on the unit and in this manual.

• Ensure correct battery system selection (lithium or lead-acid) for normal operation.
• All electrical installations must comply with local electrical safety standards and be performed by qualified personnel.
• When installing PV modules during the daytime, cover them with opaque materials to avoid dangerous high terminal voltage.
• Only charge deep-cycle lead-acid and lithium batteries. Other battery types may burst.
• Do not disassemble the unit; refer servicing to a qualified service center.
• Disconnect all wiring before maintenance or cleaning. Turning off the unit alone does not eliminate risk.
• Be cautious with metal tools around batteries to prevent short circuits or explosions.
• Strictly follow installation procedures for AC/DC terminal disconnection.
• Ensure the inverter is connected to a permanent grounded wiring system.
• Never short-circuit AC output and DC input. Do not connect to mains if DC input is short-circuited.
• Ensure the inverter is completely assembled before operation.

2. Setup and Installation

2.1 Unpacking and Inspection

Upon receiving the product, inspect the outer packaging for damage. Open the box and check for any damage to the internal equipment. If any damage is found, contact your local distributor immediately.

2.2 Installation Tools

The following tools are recommended for installation:

• 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

2.3 Mounting Unit

Choose a solid, non-flammable surface for mounting. Install the inverter at eye level for easy LCD display reading. Ensure ambient temperature is between -10°C and 60°C. Maintain at least 30cm clearance around the unit for heat dissipation and wiring access.

Figure 2: Recommended mounting clearances for the inverter. Maintain 30cm clearance on all sides for optimal performance and safety.

Mounting Steps:

1. Drill two Φ8mm holes 160mm apart on the mounting surface. Insert expansion screw tubes (M6 suggested).
2. Align the inverter's top screw holes with the installed expansion screw tubes and fix the inverter securely with screws.
3. Before connecting wires, remove the bottom cover by unscrewing the four retaining screws.

2.4 AC Input / Output Connection

Install a separate 40A AC breaker between the inverter and the AC input source for safety. Ensure correct polarity (L and N wires) to prevent short circuits in parallel operation. The N lines of input and output must not be connected together.

Recommended AC Input/Output Wire Gauge:

Connection Steps:

1. Open the AC circuit breaker.
2. Remove 12mm insulation from cable ends, shorten conductor to 10mm, insert into tubular terminal, and crimp tightly.
3. Insert AC input cables into terminal blocks according to polarity (PE → Protective Earth, L → Line, N → Neutral) and tighten screws. Connect the PE cable first.
4. Ensure all cables are securely connected.

Figure 3: AC Input and Output Connection Diagram. This diagram illustrates the terminal block connections for AC input (AC IN) and AC output (AC OUT1, AC OUT2 for dual output models).

2.5 PV Connection

Install a separate DC circuit breaker between the inverter and PV modules. Do not ground positive or negative PV terminals. High voltages can be generated by sunlight, so follow safety precautions.

PV Module Selection Parameters:

Connection Steps:

1. Open the DC circuit breaker.
2. Remove 12mm insulation from cable ends, shorten conductor to 10mm, insert into tubular terminal, and crimp tightly.
3. Use a multi-meter to check polarities.
4. Insert PV cables into terminal block according to polarity (PV+ → red, PV- → black) and tighten screws.
5. Ensure cables are securely connected.

2.6 Battery Connection

The inverter supports 48V lead-acid (AGM or FLD) and lithium batteries. For lead-acid batteries, a recommended charge current of 0.3C (C ≤ battery capacity) applies. For lithium batteries, check protocol compatibility first.

Figure 4: Compatible Battery Types. The inverter is compatible with various battery types including AGM, GEL, FLD, SLD, and LiFePO4.

Recommended Battery Cable and Terminal Size:

Connection Steps:

1. Unscrew pre-fixed screws on battery poles. Prepare 2 DT terminals (for AWG2 cables).
2. Remove 12mm insulation from cable ends, shorten conductor to 10mm, insert into DT terminal, and crimp tightly.
3. Pass battery cable through the bottom shell's installation hole and tighten terminal screws. Ensure correct polarity.
4. Connect all battery packs as required. A minimum 200Ah capacity battery is suggested.

Lithium Battery Connection (BMS):

1. Follow power cable connection as above.
2. Connect the RJ45 terminal of the battery communication cable to the BMS communication port of the inverter (RS485 or CAN protocol).
3. Insert the other end of the RJ45 cable into the lithium battery's communication port.

Figure 5: BMS Cable for Parallel Connection. This diagram illustrates two methods for connecting BMS cables in a parallel inverter system: either all battery BMS units are interconnected to one inverter, or each BMS is connected to a separate inverter if the number of inverters matches the number of batteries.

2.7 Smart Communication Stick Connection (Optional)

For models supporting external WiFi monitoring, insert the WiFi stick into the COM port to connect to the cloud platform. For models with built-in WiFi, refer to the solar APP quick configuration guide.

2.8 Final Assembly

After all wiring is complete, reattach the bottom cover by screwing in the four retaining screws.

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 an LCD display, four indicators, and four function keys (ESC, UP, DOWN, ENTER) to show operating status and input/output power information.

Figure 6: Inverter Display Panel and Controls. This image details the LCD display, indicators (AC, Invert, Charging, Fault), and control buttons (ESC, UP, DOWN, ENTER), along with physical ports like AC IN, MAIN OUT, SECOND OUT, WIFI, BMS, BAT-, BAT+, PV IN, and ON/OFF switch.

LCD Display Icons:

• Battery Information: Battery icon, battery type (AGM, FLD, USER, Li-ion), charging period (CC, CV, FLOAT), battery voltage, charging/discharging current.
• AC Input Information: AC input icon, UPS or APP input mode, AC input voltage and frequency.
• PV Input Information: PV input icon, PV power, PV voltage, PV current.
• Output Information: Output voltage (V), apparent power (VA or kVA), output active power (W or kW), output frequency.
• Battery Capacity: Indicates battery charge level.
• Load Capacity: Indicates current load percentage and overload icon.
• AC Output 2 Information: Second AC output icon, AC output 2 voltage.
• Parameter Query, Function Setting or Fault/Alarm Information: System information, function setting, fault/alarm indication.

RGB Light Indicators:

• Standby mode: White
• City electricity mode: Blue
• Battery mode: Red
• PV mode: Orange

3.3 LCD Setting

Press and hold the ENTER button for 2 seconds to enter setting mode. Use UP/DOWN to select programs and ENTER to confirm. ESC exits the mode.

Key Settings:

• Program 01 (Output Voltage): Default 230V. Adjustable: 208V, 220V, 230V, 240V.
• Program 02 (Output Frequency): Default 50Hz. Adjustable: 50Hz, 60Hz.
• Program 03 (Output Source Priority): Grid first (default), Solar first, PBG priority, MKS.
• Program 04 (Input Mode): APP (Appliance, default), UPS, GEN.
• Program 05 (Charger Source Priority): Only PV, PV first.
• Program 06 (Grid Charging Current): Default 60A. Adjustable: 2A to 120A (2A for non-parallel models only).
• Program 07 (Maximum Charging Current): Default 100A. Adjustable: 2A to 120A (2A for non-parallel models only).
• Program 08 (Menu Default): ON (default) returns to first page after 1 min inactivity, OFF stays on current page.
• Program 09 (Auto Restart when Overload): ON (default).
• Program 10 (Auto Restart when Over Temperature): ON (default).
• Program 11 (Main Input Cut Warning): ON (default) for buzzer sound on grid/PV loss, OFF disables buzzer.
• Program 12 (Energy-saving Mode): OFF (default). Not for parallel mode.
• Program 13 (Overload Transfer to Bypass): OFF (default). ON enables bypass mode on overload in PBG/MKS priority.
• Program 14 (Silent Mode Setting): OFF (default). ON disables buzzer for alarms/faults.
• Program 15 (Battery Return to Grid Voltage Point): Default 46V (AGM/FLD), 47.6V (LIT/CUS), 49.6V (FEL).
• Program 16 (Switching Back to Battery Mode Voltage Points): Default 52V (AGM/FLD), 54.4V (LIT/CUS), 53.2V (FEL).
• Program 17 (Battery Type): AGM (default), Flooded, Lithium (Ternary), FEL (Lithium iron), User-Defined.
• Program 18 (Battery Low Voltage Point): Default 44V (AGM/FLD), 47.6V (LIT/CUS), 48V (FEL).
• Program 19 (Battery Shutdown Voltage Point): Default 42V (AGM/FLD/FEL), 46V (LIT/CUS).
• Program 20 (Constant Voltage Mode Voltage Point Setting): Default 56.4V (AGM/FLD/LIT/CUS), 55.2V (FEL).
• Program 21 (Floating Charge Mode Voltage Point Setting): Default 54V (AGM/FLD), 55.2V (CUS/LIT), 54.4V (FEL).
• Program 22 (Grid Low Voltage Point): Default 154V (APP/GEN), 185V (UPS).
• Program 23 (Grid High Voltage Point): Default 264V (APP/GEN), 264V (UPS, not changeable).
• Program 24 (Automatic Turn Off Backlight): ON (default).
• Program 25 (Inverter Soft Start Setting): OFF (default). Not for parallel mode.
• Program 26 (Reset Factory Setting): Restores all settings to default.
• Program 27 (Parallel Mode Setting): SIG (single mode, default), PAR (single-phase parallel), 3P1/3P2/3P3 (three-phase parallel).
• Program 28 (Parallel Identity Code): ATO (auto mode, default), 1-9.
• Program 29 (Battery Disconnection Alarm): OFF (default).
• Program 30 (Inverter Parallel Without Battery Operation Status): OFF (default).
• Program 31 (Equalization Voltage Point): Default 58.4V.
• Program 32 (Equalization Charging Time Setting): OFF (default).
• Program 33 (Equalization Delay Time Setting): Default 120 minutes.
• Program 34 (Equalization Interval Time Setting): Default 30 days.
• Program 35 (Enable Equalization Immediately): OFF (default).
• Program 36 (Grid-tie Inverter Function): OFF (default).
• Program 37 (Max Grid Tie Power): Default 6.5kW.
• Program 38 (Battery Dual Output Low Voltage Shutdown Point): Default 48V.
• Program 39 (Battery Dual Output Duration): Default OFF.
• Program 40 (Dual Output Battery Mode Cut-off SOC): Default 20.
• Program 44 (BMS Communication Function): Default OFF.
• Program 45 (BMS ID): Default ATO.
• Program 46 (Low SOC Shutdown): Default 20.
• Program 47 (High SOC to Battery): Default 90.
• Program 48 (Low SOC to Grid): Default 50.
• Program 61 (Battery Max. Discharge Current): Default OFF.
• Program 63 (Enable Battery Disconnection Detection): ON (default).
• Program 64 (Immediate Battery Detection/Lithium Battery Activation): OFF (default).

3.4 Parallel Installation Guide (Only for parallel model)

The inverter supports parallel operation with up to 9 units in single phase or up to 7 units per phase in a 3-phase system. Ensure sufficient clearance between inverters and use recommended AC/DC breaker/disconnector sizes.

Figure 7: Parallel Inverter Wiring Diagrams. This image shows various configurations for connecting multiple inverters (2-9 units) in parallel, including connections to battery, grid, and loads.

Parallel Cable Connection in Single Phase:

Figure 8: Parallel Single Phase Wiring Diagram. This diagram illustrates how to connect 2-9 inverters in a single-phase parallel system, showing connections for grid, loads, battery, and PV.

Parallel Cable Connection in Three Phase:

Figure 9: Parallel Three Phase Wiring Diagram. This diagram shows the wiring for 3-9 inverters in a three-phase parallel system, distributing inverters across A, B, and C phases with connections to grid, loads, battery, and PV.

Communication Cable for Parallel: Ensure a circular connection of communication cables, separated by at least 5cm from power lines to avoid interference.

BMS Cable for Parallel:

1. All battery BMS units are interconnected and connected to only one inverter.
2. If the number of inverters matches the number of batteries, each BMS can be separately connected to one inverter.

System Setting for Parallel: Refer to LCD settings Program 27 and 28 for parallel mode and identity code configuration.

WiFi Connection in Parallel System:

1. Install a WiFi stick on any one inverter to upload data for the entire parallel system.
2. Install WiFi sticks on each inverter for individual data upload.

4. Maintenance

Regular maintenance ensures optimal performance and longevity of your inverter. Always prioritize safety during any maintenance procedures.

• Power Disconnection: Before any maintenance, ensure the inverter is disconnected from all external power supplies (AC, PV, and Battery). Wait at least 5 minutes after disconnection to allow internal components to discharge.
• Cleaning: Regularly check and clean the dust filter. A dirty filter can lead to overheating. Use a soft, dry cloth for external cleaning. Do not use liquid cleaners.
• Wiring Inspection: Periodically inspect all wiring connections (AC, PV, Battery, Communication) for tightness and signs of wear or damage. Ensure correct polarity.
• Fan Check: Verify that the cooling fan rotates freely and is not obstructed by foreign objects. If the fan is not working, it may indicate a fault.
• Environmental Check: Ensure the inverter's installation area maintains adequate clearance (at least 30cm) for proper ventilation and heat dissipation. Keep the ambient temperature within the specified operating range (-10°C to 60°C).
• Battery Health: For lead-acid batteries, consider using the battery equalization function periodically to prevent sulfation and maintain battery capacity. Do not use equalization for lithium batteries.
• Firmware Updates: Check for any available firmware updates from the manufacturer to ensure your inverter has the latest features and bug fixes.

5. Troubleshooting

This section provides guidance on common issues, fault codes, and alarm codes. If an issue persists, contact qualified service personnel.

5.1 Fault Reference Code

When a fault occurs, the fault indicator (red LED) will be solid ON, and the buzzer will sound for 10 seconds before stopping. The system will attempt to restart automatically. If it fails after six attempts, the machine will remain in fault status. Power off the unit completely or wait 30 minutes to restart.

5.2 Alarm Reference Code

When an alarm occurs, the red LED light will flash, and the LCD will display the alarm code. The inverter does not enter fault mode during an alarm.

5.3 General Troubleshooting

6. Specifications

The following table outlines the key technical specifications for the Anern FGI-P6500 Hybrid Solar Inverter.

7. User Tips

• Parallel Operation: For large-scale applications or increased power output, consider utilizing the parallel function. The manual suggests using 3 units together for enhanced stability, especially in mechanical factory settings.
• Battery Compatibility: Always ensure your battery type (Lead-acid or Lithium) is correctly configured in the LCD settings (Program 17) to prevent system malfunctions.
• Monitoring: Leverage the built-in or optional WiFi module for remote monitoring of your PV system. This allows you to track performance and identify potential issues from anywhere.
• Cable Management: When setting up parallel systems, keep communication cables separate from power lines (at least 5cm apart) to minimize interference and ensure reliable communication between inverters.
• Environmental Considerations: Proper ventilation is crucial. Ensure adequate clearance around the inverter and keep the dust filter clean to prevent overheating and maintain efficiency.

8. Warranty and Support

For warranty information, technical support, or service requests, please contact your authorized Anern dealer or the manufacturer directly. Ensure you have your product model number (AN-FGI-P6500) and purchase details available when contacting support.

A PDF version of this user manual is available for download from the manufacturer's website for detailed reference: User Manual (PDF)