Product Overview

This 12.8V 78Ah LiFePO4 battery is a compact and efficient energy storage solution designed for a wide range of low-voltage power applications. Built with high-quality lithium iron phosphate cells, it delivers stable output performance, high efficiency, and long service life, making it suitable for solar systems, backup power, RV energy storage, and small off-grid applications.

With a built-in battery management system, the unit ensures safe operation under various working conditions while maintaining consistent performance over long-term cycling.

Key Features

The battery is engineered for high energy efficiency, reaching up to 99% conversion performance, which helps reduce energy loss during charging and discharging processes. Its compact design and lightweight structure make it easy to transport, install, and integrate into different energy systems.

Compared with traditional lead-acid batteries, this LiFePO4 solution offers significantly longer cycle life and improved depth-of-discharge capability, making it more suitable for daily cycling applications in solar and backup systems.

The ABS housing provides mechanical durability and environmental protection, while maintaining a lightweight structure suitable for both indoor and outdoor installations.

Electrical Performance

The battery operates at a nominal voltage of 12.8V with a rated capacity of 78Ah, delivering a total energy storage capacity of 998.4Wh. Internal resistance is maintained at ≤4.8mΩ, ensuring efficient power delivery and reduced heat generation during operation.

The system supports a self-discharge rate of approximately 2% per month, allowing for stable long-term storage. It is based on LiFePO4 chemistry, known for its thermal stability and high safety performance.

The battery is designed with a 4S single-module configuration and supports optional APP-based SOC monitoring for real-time status tracking.harge Curve

Discharge Performance

The battery provides a continuous discharge current of 78A, enabling it to handle high-load applications within its voltage class. It also supports pulse discharge currents up to 100A for short durations of up to 3 seconds, ensuring reliable performance during peak demand.

The recommended discharge cut-off voltage is 10V, while the BMS system disconnects at 9.8V and restores operation at 11.6V. Short-circuit protection is activated within 200–500 microseconds to ensure rapid response in abnormal conditions.

scharge Curve

Charging System

Charging is managed through a CC-CV method to ensure stable and controlled energy input. The charging voltage range is set between 14.4V and 14.6V, with a recommended floating voltage of 13.8V for long-term maintenance charging.

The recommended charging current is 39A, while the maximum supported charging current is 78A for faster charging scenarios. The BMS charging protection threshold is set at 14.8V to prevent overvoltage conditions.

Temperature Adaptability

The battery is designed for stable performance across a wide operating temperature range. It supports discharge and charging in typical outdoor and indoor environments suitable for LiFePO4 systems, maintaining consistent performance under varying climate conditions.

Application Areas

This 12.8V 78Ah LiFePO4 battery is widely used in solar energy storage systems, RV power systems, marine applications, backup power supplies, small off-grid systems, and portable energy solutions. Its compact size and high efficiency make it ideal for residential and mobile energy storage needs.