LOSSIGY 12V 400Ah LiFePO4 Lithium Battery User Manual

1. Introduction

This manual provides essential information for the safe and efficient operation of your LOSSIGY 12V 400Ah LiFePO4 Lithium Battery. This deep cycle battery is designed for various applications including marine, RV, solar systems, and trailers, offering a reliable and long-lasting power supply. It features a built-in 250A Battery Management System (BMS) for enhanced protection and performance.

The battery utilizes completely sealed lithium-ion cells, eliminating concerns about leakage. Its robust ABS shell provides strong waterproof and fireproof performance, ensuring durability even in challenging environments. Please read this manual thoroughly before installation and use.

2. Safety Information

Adhering to safety guidelines is critical when handling and operating lithium batteries. Failure to do so may result in damage to the battery, property, or personal injury.

• Always wear appropriate personal protective equipment (PPE), including safety glasses and insulated gloves, when working with batteries.
• Do not short-circuit the battery terminals. This can cause severe damage to the battery and pose a fire hazard.
• Ensure proper ventilation during charging and discharging to prevent heat buildup.
• Do not expose the battery to extreme temperatures outside its specified operating ranges.
• Avoid dropping, puncturing, or otherwise physically damaging the battery.
• Keep the battery away from flammable materials, heat sources, and direct sunlight.
• Do not attempt to disassemble, modify, or repair the battery. Refer all servicing to qualified personnel.
• In case of fire, use a Class D fire extinguisher. Water or foam may not be effective and could worsen the situation.
• Dispose of the battery according to local regulations for lithium-ion batteries. Do not dispose of with household waste.

3. Product Overview

3.1 Key Features

• High Quality Cells: Manufactured with A-grade LiFePO4 cells for higher energy density, stable performance, and greater power. UL Testing Certificate ensures highest-level safety.
• Extended Lifespan: Provides at least 4000 charge-discharge cycles, offering a long service life of up to 10 years.
• Integrated BMS: Built-in 250A Battery Management System effectively protects the battery from damage due to high temperature, low temperature, short circuit, over-current, and over-load.
• Flexible Connectivity: Can be connected in series (up to 4 for a 48V system) or in parallel (recommended up to 4) with other LOSSIGY 12V 400Ah batteries to increase voltage or capacity.
• Versatile Application: Suitable for various deep cycle applications including RVs, trailers, campers, solar systems, trolling motors, water power supply, and off-grid living.
• Durable Construction: Features a completely sealed design and an ABS polymer shell for strong waterproof (IP65) and fireproof performance, resistant to corrosion in salt environments.

3.2 Components

The LOSSIGY 12V 400Ah LiFePO4 battery includes:

• 12V 400Ah LiFePO4 Battery Unit
• Removable M8 Stud Terminals (4 included)
• Copper Cables (2 x 1.18 inch, included for connection)

Image 3.1: Front view of the LOSSIGY 12V 400Ah LiFePO4 Lithium Battery, showing the terminals and specification label.

Image 3.2: The LOSSIGY LiFePO4 battery in an outdoor setting, highlighting its quality and long lifespan compared to traditional lead-acid batteries.

3.3 Specifications

Image 3.3: Detailed dimensions of the LOSSIGY 12V 400Ah LiFePO4 battery, including terminal size.

4. Setup and Installation

Proper setup is crucial for the performance and longevity of your battery. Ensure all connections are secure and correct.

4.1 Initial Inspection

• Upon receiving the battery, inspect it for any visible damage.
• Verify that all included components (battery, M8 terminals, copper cables) are present.

4.2 Terminal Connection

• Identify the positive (+) and negative (-) terminals on the battery.
• Connect your system's positive cable to the battery's positive terminal and the negative cable to the battery's negative terminal.
• Ensure all connections are tight and secure to prevent arcing and ensure optimal current flow.
• Use appropriate cable gauges for your application to handle the maximum continuous current.

4.3 Series and Parallel Connections

The LOSSIGY 12V 400Ah LiFePO4 battery can be connected in series or parallel to meet specific voltage or capacity requirements.

• Series Connection: Up to 4 batteries of the same type (LOSSIGY 12V 400Ah) can be connected in series to achieve higher voltages (e.g., 24V, 36V, 48V). When connecting in series, ensure all batteries are at a similar state of charge before connecting.
• Parallel Connection: Multiple batteries can be connected in parallel to increase the total capacity and maximum amp output. It is recommended to connect a maximum of 4 batteries in parallel. Ensure all batteries are at a similar state of charge before connecting in parallel.
• Always use identical battery models and capacities when connecting in series or parallel.

Image 4.1: Illustration showing multiple LOSSIGY LiFePO4 batteries, demonstrating the potential for series and parallel connections to expand system capacity.

5. Operating Instructions

Understanding the operational parameters will help maximize the battery's performance and lifespan.

5.1 Charging

• Use a LiFePO4 compatible charger. Do not use chargers designed for lead-acid batteries unless they have a specific LiFePO4 charging profile.
• Recommended Charging Current: 50A.
• Charge Voltage Range: 14.2V - 14.6V.
• Full Charge Voltage Range: 13.4V - 13.8V.
• Charging Temperature: 32℉ - 113℉ (0℃ - 45℃). The BMS will protect the battery from charging outside this range.

5.2 Discharging

• Nominal Voltage: 12.8V.
• Max Continuous Discharge Current: 250A.
• Max Continuous Load: 3200W.
• Discharge Temperature: -4℉ - 140℉ (-20℃ - 60℃). The BMS will protect the battery from discharging outside this range.
• The built-in BMS will automatically cut off power if the battery is discharged below its safe voltage limit to prevent damage.

5.3 Typical Applications

This battery is ideal for deep cycle applications requiring reliable and long-lasting power, such as:

• Recreational Vehicles (RVs) and Campers
• Marine Applications (Boats, Trolling Motors)
• Solar Energy Storage Systems (Off-grid and Grid-tied)
• Electric Vehicles (Golf Carts, Scooters)
• Backup Power Systems

Image 5.1: The LOSSIGY LiFePO4 battery depicted in an RV and outdoor travel scenario, illustrating its suitability for mobile and off-grid power needs.

6. Maintenance

LiFePO4 batteries require minimal maintenance compared to traditional lead-acid batteries, but following these guidelines will ensure optimal performance and longevity.

• Regular Inspection: Periodically check the battery for any signs of physical damage, loose connections, or corrosion on the terminals. Clean terminals if necessary.
• Cleaning: Keep the battery surface clean and dry. Use a soft, damp cloth to wipe away dust or dirt. Do not use harsh chemicals or abrasive cleaners.
• Storage: If storing the battery for an extended period, ensure it is charged to 30-50% of its capacity. Store in a cool, dry place with a storage temperature range of 10℉ - 122℉ (-12℃ - 50℃). Recharge every 3-6 months if stored for very long periods to prevent self-discharge.
• Avoid Deep Discharge: While the BMS protects against over-discharge, consistently running the battery to its low voltage cutoff can reduce overall cycle life.

7. Troubleshooting

The built-in BMS provides comprehensive protection, but if you encounter issues, consider the following:

If you are unable to resolve an issue using the troubleshooting steps above, please contact LOSSIGY customer support for assistance.

8. Warranty and Support

LOSSIGY stands behind the quality of its products.

• Warranty: LOSSIGY provides a 5-year warranty for each 12V 400Ah LiFePO4 battery sold. This warranty covers defects in materials and workmanship under normal use.
• Customer Support: For any questions, technical assistance, or warranty claims, please contact LOSSIGY customer service. Refer to the contact information provided with your purchase or through the Amazon platform.