12V 400Ah LiFePO4 Battery

Our 12V 400Ah LiFePO4 lithium battery delivers high-performance energy storage with a compact design, ideal for off-grid systems, marine applications, and industrial equipment. As a leading lithium battery manufacturer, we prioritize durability, safety, and customization for OEM partners and wholesale buyers seeking reliable power solutions.

Key Features

5.12kWh Energy Capacity: Built with high-density LiFePO4 cells, this battery provides extended runtime for demanding applications.
IP65 Protection: Dustproof and waterproof design ensures reliable operation in harsh environments.
Self-Heating Option: Maintains optimal performance in sub-zero temperatures, expanding usability to cold climates.
Advanced BMS: Integrated protection against overcurrent, overheating, and voltage extremes enhances safety and longevity.
LCD Display: Real-time monitoring of charge status and health metrics simplifies maintenance.

Product Description

Designed for versatility, the 12V 400Ah lithium battery combines a lightweight ABS case with a BCI Group 8D footprint, ensuring compatibility with standard enclosures. Its >5000-cycle lifespan (80% DOD) reduces replacement costs, while optional Bluetooth, 4G, or CAN-bus connectivity supports smart energy management. Ideal for OEM integrations, this battery supports parallel configurations up to four units, scaling to 20.48kWh systems.

Technical Advantages

Wide Temperature Range: Operates seamlessly from -20¡ãC to 60¡ãC, outperforming traditional lead-acid batteries.
Fast Charging: Accepts up to 100A continuous charge/discharge currents for rapid energy replenishment.
Customization Ready: OEM/ODM services include laser logos, silkscreen branding, and tailored communication protocols (RS485, WiFi, etc.).

Certifications & Compliance

Meeting global standards such as UL 1642, IEC 62619, and UN38.3, this battery guarantees safety and quality for international markets. Our lithium battery manufacturing process adheres to strict ISO guidelines, ensuring consistency for high-volume wholesale orders.

A 12V 400Ah LiFePO4 battery provides high-capacity, long-lasting, and safe energy storage with rapid charging and low maintenance. Ideal for solar, RV, marine, and backup power applications, it delivers reliable performance, extended cycle life, and lightweight design, making it a superior alternative to traditional lead-acid batteries.

What Are the Key Specifications of a 12V 400Ah LiFePO4 Battery?

The 12V 400Ah LiFePO4 battery typically offers a nominal voltage of 12.8V and a capacity of 400Ah, equating to approximately 5.12 kWh of usable energy. It weighs around 40 to 45 kg (approximately 86 to 99 lbs), significantly lighter than equivalent lead-acid batteries. The battery supports continuous discharge currents up to 250A and peak discharge currents of 500A for short bursts. It operates efficiently across a temperature range of -20°C to 60°C and features an advanced Battery Management System (BMS) that protects against overcharge, over-discharge, overcurrent, short circuits, and extreme temperatures. The casing is typically rated IP65 or higher for dust and water resistance.

How Does a 12V 400Ah LiFePO4 Battery Compare to Lead-Acid Batteries?

Compared to lead-acid batteries, the 12V 400Ah LiFePO4 battery offers:

• Longer Lifespan: Over 4000 cycles at 100% depth of discharge versus 200-500 cycles for lead-acid.

• Lighter Weight: Approximately 40% lighter, easing installation and transport.

• Faster Charging: Supports 1C charging rates, enabling full charge in 3-5 hours.

• Higher Efficiency: Up to 99% energy efficiency with minimal voltage drop.

• Low Maintenance: No watering or equalizing charges required.

• Enhanced Safety: Thermally stable chemistry with built-in BMS protections.

This translates into lower total cost of ownership and improved system reliability.

What Are the Safety Features of a 12V 400Ah LiFePO4 Battery?

Safety is ensured through:

• Advanced BMS: Monitors voltage, current, temperature, and state of charge to prevent unsafe conditions.

• Thermal Stability: Lithium iron phosphate chemistry minimizes risk of thermal runaway.

• Robust Enclosure: Durable, waterproof, and dustproof casing (IP65 or higher).

• Cell Balancing: Maintains uniform charge across cells, preventing damage.

• Overcurrent and Short Circuit Protection: Safeguards battery and connected equipment.

These features make it suitable for demanding environments and applications.

How Should a 12V 400Ah LiFePO4 Battery Be Charged and Maintained?

Charging requires a compatible LiFePO4 charger with a recommended bulk voltage around 14.4V and float voltage near 13.6V. The battery supports charging currents up to 250A, allowing rapid recharge times of 3 to 5 hours depending on charger capacity.

Maintenance is minimal:

• Keep terminals clean and free of corrosion.

• Avoid deep discharges below 10.5V.

• Store in a cool, dry environment when not in use.

• Regularly inspect battery health via BMS or monitoring tools.

Proper charging and care optimize battery lifespan and performance.

Which Applications Benefit Most from a 12V 400Ah LiFePO4 Battery?

This battery size is ideal for:

• Off-grid and residential solar energy storage.

• Recreational vehicles (RVs) and camper vans.

• Marine applications including boats and yachts.

• Backup power for homes and commercial sites.

• Heavy-duty trucks and industrial equipment.

Its high capacity, safety, and durability make it versatile across these sectors.

What Are the Environmental Benefits of Using LiFePO4 Batteries?

LiFePO4 batteries offer:

• Non-toxic Materials: Free from heavy metals like lead and cadmium.

• Long Service Life: Reduces waste and frequency of replacements.

• High Energy Efficiency: Lowers overall energy consumption.

• Recyclability: Components are more environmentally friendly to recycle.

These factors support sustainable energy goals and regulatory compliance.

How Does Heated Battery Enhance the 12V 400Ah LiFePO4 Battery Experience?

Heated Battery incorporates advanced features into their 12V 400Ah LiFePO4 batteries, including:

• Integrated heating systems to maintain optimal battery temperature in cold climates.

• Intelligent BMS with remote monitoring and diagnostics.

• Rugged, waterproof casings designed for harsh environments.

These enhancements ensure consistent, reliable performance year-round, making Heated Battery a trusted choice for demanding applications.

What Are the Cost Considerations When Purchasing a 12V 400Ah LiFePO4 Battery?

While the upfront cost is higher than lead-acid batteries, the total cost of ownership is lower due to:

• Extended cycle life reducing replacement frequency.

• Minimal maintenance expenses.

• Energy savings from higher efficiency.

• Reduced downtime thanks to faster charging.

Choosing reputable brands like Heated Battery ensures warranty support and long-term reliability.

Heated Battery Expert Views

The 12V 400Ah LiFePO4 battery represents a breakthrough in energy storage technology, combining high capacity, safety, and longevity in a compact, lightweight package. Heated Battery’s integration of heating technology and advanced BMS ensures optimal battery performance even in extreme conditions, reducing downtime and maintenance costs. This commitment to innovation supports sustainable and reliable power solutions across residential, commercial, and mobile applications.
— Senior Battery Engineer, Heated Battery