Anern 6.5KW Hybrid Solar Inverter User Manual

1. Introduction

This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Anern 6.5KW Hybrid Solar Inverter. Please read it thoroughly before proceeding with any procedures.

1.1 Product Overview

The Anern AN-FGI-S6500 is a multifunctional hybrid solar inverter designed for off-grid backup power and self-consumption applications. It integrates a high-efficiency MPPT solar charge controller, a pure sine wave inverter, and a UPS function module into a single unit. This inverter can operate with or without batteries, offering flexibility for various solar energy storage systems.

The system typically requires additional components such as PV modules, a generator, or a utility grid connection to function completely. For remote monitoring, an optional WiFi/GPRS module can be installed, allowing users to track the PV system's status via mobile phone or web interface.

1.2 Key Features

• Rated Power: 6.5KW / 6.5KVA, Power Factor 1
• MPPT Voltage Range: 60V~450V, 500Voc (Open Circuit Voltage)
• Output: Pure Sine Wave AC, Dual AC Output
• Battery Compatibility: Compatible with 24V Lead-acid and Lithium Batteries
• Operating Modes: Supports Solar, Utility, or Generator Power to charge batteries; can power loads simultaneously from solar and utility grid.
• Communication: CAN/RS485 for BMS communication
• Flexibility: Ability to work without batteries (batteryless mode)
• Monitoring: Optional WiFi remote monitoring
• Grid Interaction: Feed-in to grid capability

2. Safety Instructions

WARNING! This chapter contains important safety and operating instructions. Read and keep this manual for future reference.

• Always ensure correct battery system selection (lithium or lead-acid) to prevent system malfunction.
• All electrical installations must comply with local electrical safety standards and be performed by professional electrical or mechanical engineers.
• When installing PV modules during daytime, cover them with opaque materials to avoid dangerous high terminal voltages.
• To reduce the risk of injury, charge only deep-cycle lead-acid or lithium rechargeable batteries. Other battery types may burst.
• Do not disassemble the unit. Refer servicing to qualified personnel. Incorrect re-assembly can lead to electric shock or fire.
• Disconnect all wiring before maintenance or cleaning. Turning off the unit alone does not eliminate this risk.
• Never charge a frozen battery.
• Use appropriate cable sizes as specified in this manual for optimal and safe operation.
• Exercise extreme caution when working with metal tools near batteries to prevent sparks or short circuits, which can cause explosions.
• Strictly follow installation procedures for disconnecting AC or DC terminals.
• This inverter must be 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 fully assembled before operation.

2.1 Labels and Symbols

Familiarize yourself with the following symbols used on the inverter and in this manual:

• CAUTION: Do not disconnect under load!
• Danger: High Voltage! Electrical Hazard!
• 5 min: Wait at least 5 minutes after disconnecting all external power supplies before maintenance.
• Read Manual: Read instructions carefully before any operation.
• Grounding: The system must be firmly grounded for operator safety.

3. Setup and Installation

3.1 Unpacking and Inspection

Upon receiving the inverter, inspect the packaging for any damage. Open the box and check if the unit itself is intact. Report any damage to your distributor immediately. The packing list includes:

• 1 x Anern 6.5KW Hybrid Solar Inverter
• 1 x User Manual
• 10 x Tubular Terminals (for AC input/output and PV input)
• 1 x OT Terminal (for PE)

3.2 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

3.3 Mounting the Unit

Location Considerations:

• Mount on a solid, non-flammable surface (concrete or similar).
• Ensure the LCD display is at eye level for easy reading.
• Maintain an ambient temperature between -15°C and 50°C for optimal operation.
• Mount vertically on the wall.
• Allow at least 30cm clearance around the unit for proper heat dissipation and wiring access.

Mounting Steps:

1. Drill two Φ8 holes 200mm apart on the mounting surface. Insert M6 expansion screw tubes.
2. Align the inverter's top screw holes with the installed expansion screws and secure the inverter to the wall.
3. Before connecting wires, remove the bottom cover by unscrewing four screws.

3.4 AC Input / Output Connection

CAUTION: Install a separate 40A AC breaker between the inverter and the AC input source. Ensure correct polarity (L, N, PE) and do not mis-connect input/output terminals.

Recommended Cable Sizes:

• AC Input: 10 AWG (5.26 mm²)
• AC Output: 12 AWG (4 mm²)

Wiring Steps:

1. Ensure AC power is disconnected and the AC breaker is open.
2. Strip 12mm of insulation from cable ends, shorten conductor to 10mm, and crimp tubular terminals securely.
3. Connect the PE (Protective Earth - yellow-green) cable first to the inverter.
4. Connect L (Line - brown or black) and N (Neutral - blue) cables to their respective terminals (AC IN, AC OUT1, AC OUT2) and tighten screws.

3.5 PV Connection

WARNING: Install a separate DC circuit breaker between the inverter and PV modules. Do not ground PV terminals. Ensure correct polarity (PV+, PV-) to avoid damage.

Recommended Cable Size: 10 AWG (5.26 mm²)

PV Module Selection Criteria:

• Max PV Array Open Circuit Voltage (Voc) must not exceed 500Vdc.
• PV Array Voc must be higher than 60Vdc (startup voltage).
• PV Array MPPT Voltage Range: 60Vdc~450Vdc.

Wiring Steps:

1. Ensure the DC circuit breaker is open.
2. Strip 12mm of insulation from cable ends, shorten conductor to 10mm, and crimp tubular terminals.
3. Verify polarity with a multi-meter: PV+ (red), PV- (black).
4. Connect PV+ and PV- cables to the corresponding terminals and tighten screws.

3.6 Battery Connection

WARNING: Install a separate DC over-current protector or disconnect device (recommended 150A) between the battery and inverter. Ensure correct polarity (BAT+, BAT-).

3.6.1 Lead-acid Battery Connection (48V, AGM or FLD)

Recommended Cable Size: 2 AWG (25 mm²)

Wiring Steps:

1. Prepare 2 DT terminals (suitable for AWG2 cables).
2. Strip 12mm of insulation, shorten conductor to 10mm, and crimp DT terminals.
3. Pass battery cables through the bottom shell, connect to BAT+ and BAT- terminals, and tighten screws. Ensure correct polarity at both the battery and inverter.
4. Connect battery packs as required (suggested minimum 200Ah capacity).

3.6.2 Lithium Battery Connection

Check protocol compatibility with the inverter first. Lithium batteries typically have an RJ45 port for BMS communication and power cables.

1. Connect power cables as described for lead-acid batteries (Section 3.6.1).
2. Connect the RJ45 terminal of the battery communication cable to the BMS communication port on the inverter (RS485 or CAN protocol).
3. Connect the other end of the RJ45 cable to the lithium battery's BMS communication port.
4. In inverter settings (Program 17), select