12V 400Ah Lithium Battery

The Redway Power 12V 400Ah Lithium Battery is a high-capacity energy solution engineered for demanding off-grid, RV, and marine applications. As a leading lithium battery manufacturer, we specialize in OEM/ODM partnerships, delivering durable LiFePO4 technology with unmatched reliability and customization for industrial and commercial needs.

Key Features

High Energy Density: 400Ah capacity and 5.12kWh energy output support extended runtime for large appliances and systems, ideal for continuous off-grid power.
Extended Lifespan: Over 4,000 cycles at 80% DoD ensure long-term cost savings, outperforming traditional lead-acid batteries by 300%.
Extreme Environment Resilience: Operates reliably in temperatures from -20¡ãC to 60¡ãC, making it suitable for harsh climates.
Advanced Safety: Integrated BMS protects against overcharge, over-discharge, and short circuits, ensuring stable performance.
Customizable Design: Tailored configurations for OEM/ODM projects, including Bluetooth monitoring and LCD displays for real-time data access.

Product Description

Designed for reliability, the Redway Power 12V 400Ah Lithium Battery features premium LiFePO4 cells with a 12.8V nominal voltage. Its compact dimensions (523¡Á269¡Á218mm) and 39kg weight optimize space in RVs, marine vessels, and solar setups. The IP65-rated enclosure resists dust and water, while 100A continuous discharge supports high-power demands. With a 10-year design life and certifications including UL, CE, and RoHS, this battery is a trusted choice for renewable energy, backup systems, and industrial applications.

How Does a 12V 400Ah Lithium Battery Optimize Power and Longevity?

A 12V 400Ah lithium battery, especially using LiFePO4 technology, provides high-capacity, efficient, and long-lasting energy storage with superior safety and performance compared to traditional lead-acid batteries. Its advanced Battery Management System (BMS) ensures protection and optimal operation, making it ideal for residential, commercial, and industrial applications requiring reliable power.

What are the technical specifications of a 12V 400Ah lithium battery?

A typical 12V 400Ah lithium battery features a nominal voltage of 12.8V and a capacity of 400Ah, delivering approximately 5.12kWh of energy. It includes premium LiFePO4 cells with an internal resistance below 40mΩ, supports continuous discharge currents of 200-250A, and peak discharge currents up to 500A. Dimensions vary around 520 x 269 x 220 mm, with weights between 38 to 51 kg. The battery is housed in durable ABS or aluminum casing with IP65 protection.

How does a 12V 400Ah lithium battery enhance energy storage and performance?

This battery delivers stable voltage output and high energy density, enabling longer runtimes and faster charging (often under 3 hours). Its flat discharge curve maintains consistent power throughout use, supporting multi-shift operations and reducing downtime. The battery’s lightweight design improves portability and installation flexibility.

What advantages do LiFePO4 batteries offer over traditional lead-acid batteries?

LiFePO4 batteries provide up to 6 times longer cycle life (up to 6000 cycles at 80% DoD), faster charging, zero maintenance, and higher safety due to thermal stability. They eliminate acid leaks and toxic fumes, reduce weight by up to 70%, and offer better performance in extreme temperatures, lowering total cost of ownership.

How long is the cycle life and lifespan of a 12V 400Ah lithium battery?

Typically, these batteries last over 4000 cycles at 80% depth of discharge, translating to 10 to 15 years of service life depending on usage and maintenance. Lower depth of discharge and proper care can extend lifespan further.

What safety features and certifications ensure the reliability of this battery?

Equipped with an advanced BMS, the battery monitors voltage, current, temperature, and state of charge to prevent overcharge, overdischarge, short circuits, and thermal runaway. Certifications include UL, CE, RoHS, UN38.3, and FCC, ensuring compliance with international safety and quality standards.

How does the Battery Management System (BMS) protect and optimize battery performance?

The BMS balances cell voltages, manages charge and discharge cycles, and safeguards against electrical faults and temperature extremes. It enables real-time monitoring and communication via RS485, CAN bus, or Bluetooth, allowing predictive maintenance and enhanced safety.

What are the physical size and weight considerations for installation?

Typical dimensions are approximately 520 mm long, 269 mm wide, and 220 mm high, with weights between 38 and 51 kg. The compact and lightweight design facilitates easy installation in various systems, including solar energy storage, backup power, and electric vehicles.

How does temperature influence the performance and charging of a 12V 400Ah lithium battery?

The battery operates effectively between -20°C and 60°C for discharge and 0°C to 50°C for charging. Extreme temperatures can reduce efficiency and lifespan, so temperature-controlled environments and charging are recommended for optimal performance.

How do you select the right 12V 400Ah lithium battery for your specific application?

Consider voltage and capacity requirements, discharge current needs, physical space, and environmental conditions. Choose batteries with integrated BMS and certifications from reputable suppliers like Lithium-Battery-Manufacturer to ensure quality and support.

What maintenance practices maximize lifespan and safety of the battery?

Maintenance is minimal: keep terminals clean, avoid deep discharge, store in cool, dry places, and use compatible chargers. Regular monitoring via BMS helps detect issues early, ensuring longevity and safety.

How does parallel and series expansion work with 12V 400Ah lithium batteries?

Multiple batteries can be connected in parallel to increase capacity or in series to increase voltage, enabling scalable energy storage solutions. Proper BMS coordination and matching battery specifications are essential for safe and efficient expansion.

Battery Specification and Performance Chart

Charging and Temperature Range Chart