Anern AN-FGI-AS Series MPPT Solar Inverter User Manual

1. Introduction

This manual describes the assembly, installation, operation, and troubleshooting of the Anern AN-FGI-AS series MPPT Solar Inverter. Please read this manual carefully before installation and operation, and keep it for future reference.

1.1. Scope

This manual provides safety and installation guidance, as well as information about tools and wiring required for the inverter.

1.2. Target Group

This document is intended for qualified persons and end-users. Qualified persons should possess the following skills:

• Knowledge of how an inverter works and is operated.
• Training in handling dangers and risks associated with electrical devices and installations.
• Training in the installation and commissioning of electrical devices and installations.
• Knowledge of applicable standards and directives.
• Compliance with this document and all safety information.

1.3. Safety Instructions

• Before using the unit, read all instructions and cautionary markings on the unit, batteries, and all appropriate sections of this manual.
• Ensure correct battery system selection (lithium or lead-acid) for normal operation.
• Do not disassemble the unit. Refer to a qualified service center for repairs.
• All operations and connections must be performed by professional electrical or mechanical engineers, complying with local electrical safety standards.
• CAUTION: To reduce injury risk, charge only deep-cycle lead-acid or lithium rechargeable batteries. Other battery types may burst.
• To reduce electric shock risk, disconnect all wiring before maintenance or cleaning.
• For optimum operation, select appropriate cable sizes as specified.
• GROUNDING INSTRUCTIONS: This inverter must be connected to a permanent grounded wiring system, complying with local requirements.
• NEVER short-circuit AC output and DC input. Do not connect to mains if DC input is short-circuited.
• Do not install the inverter in harsh environments (moist, oily, flammable, explosive, dusty).
• Warning: Only qualified personnel can repair this equipment.
• Do not reverse battery input polarity to avoid damage or risks.
• Ensure the inverter is fully assembled before operation.
• Confirm the inverter AC output power is the sole input for the load; do not parallel with other AC power sources.
• Attach proper fuses or circuit breakers externally.

1.4. System Overview

The inverter integrates into a solar power system as shown in the diagram below. A complete system typically consists of:

• PV String: Converts light energy to DC power, charging batteries or directly powering AC loads.
• Mains or Generator: Connected to AC input, powers loads and charges batteries.
• Battery: Stores and releases energy. Supports lithium and lead-acid batteries.
• Household Load: Connects various household and office appliances.
• Hybrid Solar Charge Inverter: The central energy conversion unit.
• WiFi or GPRS: For remote system monitoring.
• CT (Current Transformer): Detects current flow (two CTs on fire lines, arrows point to inverter).

Figure 1: Typical Home Solar Power System Setup

1.5. Product Features

• Sectional charge and discharge function with customizable time periods.
• Supports both lead-acid and lithium batteries.
• Anti-feed-in, self-consumption function (hybrid power from solar, battery, and grid).
• Can operate without a battery; solar and utility grid can power loads simultaneously.
• Dual activation function for lithium batteries (triggered by mains or solar when dormant).
• Power saving mode to reduce no-load loss.
• Four charging modes: Only Solar, Mains Priority, Solar Priority, and Mains & Solar hybrid.
• Two output modes: mains bypass and inverter output for uninterrupted power supply.
• Comprehensive protections: over/under voltage, overload, reverse protection, etc. (360° all-round protection).
• Touch-resistant LCD screen with dynamic flow diagram for easy system data and status understanding.
• Full digital voltage and current double closed-loop control, advanced SPWM technology, pure sine wave output.
• Supports split-phase and single-phase pure sine wave output.
• Supports five voltage levels: 100Vac, 105Vac, 110Vac, 120Vac, 127Vac per phase.
• Two independent MPPTs with 99.9% tracking efficiency.
• Intelligent variable speed fan for efficient heat dissipation and extended lifespan.
• Diverse human-computer interaction: CAN, USB, WiFi, RS485 communication, local/remote power on/off, dry contact control.
• Extendable with external CT for whole-house energy anti-feed-in and self-consumption.

Figure 2: AN-FGI-AS10000P Key Specifications

Figure 3: Inverter supports BMS communication, Lead-Acid & Lithium batteries, and multi-mode charging.

2. Setup and Installation

2.1. Unpacking and Inspection

Before installation, inspect the unit for any damage. The package should contain:

• Inverter Unit x 1
• User Manual x 1
• Ring Terminal x 2
• Expansion Bolts x 2
• Expansion Screws x 2
• Dust Cap x 2

2.2. Preparation

Before wiring, remove the bottom cover by unscrewing four screws.

2.3. Mounting the Unit

Consider the following when selecting a mounting location:

• Do not install on flammable building materials.
• Mount on a sturdy surface.
• Install at eye level for easy LCD display reading.
• Ambient temperature should be between -10°C and 55°C for optimal operation.
• Recommended installation is vertically on a wall.
• Ensure sufficient space (at least 50cm above/below, 20cm sides) for heat dissipation and wiring access.
• Note: Suitable for mounting on concrete or other non-combustible surfaces only.

2.4. Battery Connection

The inverter supports 48V lead-acid and lithium batteries. Always install a DC over-current protector or disconnect device between the battery and inverter.

2.4.1. Lead-acid Battery Connection

Choose a 48V lead-acid battery and select the correct battery type (GEL, SLD, or FLD) in settings. Use recommended cable and terminal sizes (e.g., 67mm²/00AWG for 270A discharge current). Recommended charge current is 0.2C (C = battery capacity).

1. Assemble battery ring terminals.
2. Connect all battery packs (suggested minimum 200Ah capacity).
3. Insert ring terminals into the inverter's battery connector, ensuring bolts are tightened to 2Nm. Verify correct polarity.

WARNING: Shock Hazard! Installation must be performed with care due to high battery voltage. Do not place anything between the inverter terminal and ring terminal. Do not apply anti-oxidant substance on terminals before tightening. Ensure positive (+) connects to positive (+) and negative (-) to negative (-).

2.4.2. Lithium Battery Connection

Use configured lithium batteries. Connect the battery's RJ45 BMS port to the inverter's RS485-2/BMS communication port. Ensure the lithium battery BMS port connects to the inverter is Pin to Pin. The inverter BMS (RS485-2/BMS) port pin assignment is as follows:

2.5. AC Input/Output Connection

CAUTION: Install a separate AC breaker between the inverter and AC input source. Do not mis-connect input and output connectors. All wiring must be performed by qualified personnel using appropriate cable sizes (e.g., 13mm²/6AWG for 60A bypass current).

1. Open DC protector/disconnector before connecting AC.
2. Remove 10mm insulation from conductors; shorten phase L and neutral N by 3mm.
3. Insert AC input wires according to polarities and tighten screws. Connect PE (yellow-green) first.
4. Insert AC output wires according to polarities and tighten screws. Connect PE first.
5. Ensure all wires are securely connected.

CAUTION: Important! Connect AC wires with correct polarity. Reverse connection can cause utility short-circuit. Appliances like air conditioners require 2-3 minutes to restart; ensure time-delay function is present to prevent damage from power fluctuations.

2.6. PV Connection

CAUTION: Install a DC circuit breaker between the inverter and PV modules. All wiring must be performed by qualified personnel. Do not connect one PV string to more than one inverter. Use appropriate cable sizes (e.g., 5.2mm²/10AWG for 27A input current).

2.6.1. PV Module Selection

Consider the following parameters:

• PV array open circuit voltage (Voc) must not exceed max inverter PV array open circuit voltage (500Vdc).
• PV array Voc must be higher than the inverter's start-up voltage (120Vdc).
• PV Array MPPT Voltage Range: 90Vdc~450Vdc.

1. Remove 10mm insulation from positive and negative conductors.
2. Check polarity of PV modules and input connectors. Connect positive (+) to positive (+) and negative (-) to negative (-).
3. Ensure wires are securely connected.

2.7. Parallel Installation and Wiring

Maximum six inverters can be used in parallel (only for "-500P" models). Use the provided parallel communication line.

2.7.1. Precautions

• Battery Wiring: For parallel connection of batteries, all inverters must connect to the same battery with correct polarity, same wiring length, and line diameter. For separate battery connections, each inverter connects to its own battery with correct polarity and matching wiring.
• AC OUT Wiring: For split-phase, ensure L1-L1, L2-L2, N-N, PE-PE connections with correct wiring length and diameter. For single-phase, ensure N-N, PE-PE connections, and all L(L1 and L2) lines connect together.
• AC IN Wiring: Similar to AC OUT wiring, ensure correct phase connections and wiring. Do not use multiple different AC source inputs.
• Parallel Communication Line: Use a DB15 standard computer cable. Connect male (out) to female (in) for each inverter. Do not connect male to female on the same inverter. Tighten screws.

Figure 4: Parallel Connection in Split Phase and Single Phase

2.8. Final Assembly

After all wiring is complete, replace the bottom cover and secure it with the four screws.

2.9. Starting the Inverter

1. Close the battery circuit breaker.
2. Press the ON/OFF switch at the bottom of the inverter; the screen and indicator lights will illuminate, indicating activation.
3. Close the circuit breakers for PV, AC input, and AC output in sequence.
4. Start loads one by one, from smallest to largest power.

3. Operating the Inverter

3.1. Power ON/OFF

Once installed and batteries connected, press the ON/OFF switch (located on the bottom of the case) to power on the unit.

3.2. Operation and Display Panel

The front panel features an LCD display and indicators showing operating status and input/output power information.

3.3. Setup Parameters Description

Access settings by pressing the "Setting" button on the LCD. Navigate using "<" and ">" to select parameters, then press "Confirm" to upload changes. In parallel mode, all machines synchronize settings with the host unit.

3.4. Operating Mode Description

3.4.1. Charging Modes

• PV Priority: PV modules charge the battery preferentially. Mains charges only if PV fails. Ideal for stable grids.
• Mains Priority: Mains supply charges the battery preferentially. PV charges only if Mains fails.
• Hybrid Charging: PV and Mains hybrid charging. PV MPPT charging is priority; Mains supplements if PV energy is insufficient. Fastest charging mode.
• Only Solar: Only PV charges the battery, without Mains. Most energy-efficient for good lighting conditions.

3.4.2. AC Output Modes

• PV Priority Mode: Photovoltaics and batteries power the load. Switches to Mains if PV charging fails. Maximizes solar energy use.
• Mains Priority Mode: Switches to inverter only if Mains fails. Acts as a backup UPS.
• Battery Priority Mode: Switches to Mains only if battery discharge is below "inv to line volt" setting. Maximizes DC power use.
• Hybrid Mode: Configurable for Constant Power On Grid (excess PV to grid) or Energy To Output (PV generation only to load).

4. Maintenance

To ensure long-term performance, perform checks twice a year:

1. Ensure airflow around the unit is not blocked; remove dirt/debris from the heat sink.
2. Check exposed wires for damage (sunlight, friction, dryness, pests); repair or replace as needed.
3. Verify consistency of indications and displays; address any faults or errors.
4. Check wiring terminals for corrosion, insulation damage, signs of overheating; tighten screws.
5. Clean for dirt, nesting insects, and corrosion.
6. If the arrester has failed, replace it to prevent lightning damage.

The manufacturer is not liable for damage caused by:

• Improper use or installation.
• PV module open circuit voltage exceeding maximum allowable voltage.
• Operating environment temperature exceeding limits.
• Unauthorized disassembly or repair.
• Force majeure (transportation/handling damage).

DANGER: Electric Shock! Before maintenance, ensure all power supplies are disconnected and all capacitors are discharged.

5. Troubleshooting

This section provides common fault codes and their corresponding countermeasures.

5.1. Fault Codes and Descriptions

5.2. Troubleshooting Guide

Note: If a product fault cannot be resolved, contact customer service; do not disassemble the equipment yourself.

6. Technical Specifications

The Anern AN-FGI-AS series MPPT Solar Inverter comes in various models with the following general specifications:

Figure 5: AN-FGI-AS12000P Key Specifications

7. Warranty and Support

For warranty terms, conditions, and support, please refer to the official documentation provided by your seller or contact Anern customer service directly. This manual provides operational guidance and does not constitute a warranty statement.

8. User Tips

• Always ensure proper ventilation around the inverter to prevent overheating and ensure optimal performance.
• Regularly check all cable connections for tightness and signs of wear to maintain system reliability and safety.
• Familiarize yourself with the LCD display and fault codes to quickly diagnose and address any issues that may arise.
• When configuring battery settings, ensure they precisely match your battery type and specifications for efficient charging and discharge cycles.