48V Series – 100Ah DC Energy Storage Battery Stacked Pack

The FongPower 51.2V DC Energy Storage System is a compact lithium battery solution designed for home backup, outdoor power, small off-grid applications, and auxiliary power for RVs and yachts. Built with LiFePO4 battery cells, the system combines high safety, long cycle life, flexible installation, and reliable DC power output.

With a nominal voltage of 51.2V and a standard 48V DC output configuration, the battery pack can integrate with mainstream inverters and power conversion systems. Its stackable structure and compact dimensions make it suitable for installations where available space is limited.

Product Specifications

Key Product Features

LiFePO4 Battery Technology

The system uses LiFePO4 battery cells, providing a combination of high safety, stable operation, and long service life. The battery chemistry is suitable for applications requiring dependable energy storage for daily backup and off-grid power requirements.

51.2V DC Architecture

With a nominal voltage of 51.2V and a 44–58.4V operating range, the battery provides stable DC power within its designed operating window. The 48V-class output configuration also allows integration with mainstream inverter systems.

5.12kWh Energy Capacity

Each battery pack provides 5.12kWh of nominal energy with a rated capacity of 100Ah @ 0.5C. Up to four modules can be connected in parallel, providing greater flexibility when higher storage capacity is required.

High Usable Capacity

The recommended Depth of Discharge is 95%, allowing users to access a high proportion of the rated battery capacity while maintaining appropriate protection for long-term battery operation.

Flexible Current Performance

The system supports a 50A rated charge/discharge current, with a maximum current of 100A and a 120A peak current under 3S conditions. This configuration supports applications requiring relatively fast charging and higher-power discharge.

Compact, Stackable Design

Measuring 490 × 170 × 527.5mm and weighing 47kg, the battery pack is designed for stable installation while minimizing the space required for deployment.

The stackable configuration allows multiple modules to be arranged efficiently according to the installation environment and system capacity requirements.

Integrated LCD User Interface

An LCD display and push-button controls provide a straightforward local interface. Users can check operating status and relevant battery information directly from the unit without relying entirely on an external monitoring platform.

Natural Cooling System

The battery uses natural cooling rather than an active cooling system. This maintenance-free thermal management approach reduces system complexity while supporting reliable continuous operation under the specified environmental conditions.

Communication Interfaces for System Integration

The battery supports RS485/CAN communication with PCS systems and RS485 communication for BMS functions.

These interfaces enable battery status and operating information to be exchanged with compatible power conversion and energy management equipment, supporting easier system integration.

Operating and Environmental Conditions

The 51.2V DC Energy Storage System is designed for indoor and moderate environmental conditions.

Charging temperature: 0°C to +50°C
Discharging temperature: -20°C to +55°C
Storage temperature: 0°C to 45°C
Relative humidity: 10%–85%
Maximum operating altitude: ≤3000m
Protection rating: IP32

The discharge temperature range from -20°C to +55°C allows the battery to support applications exposed to relatively wide temperature variations.

The IP32 protection level provides basic protection against solid objects and water dripping, making the system primarily suitable for appropriate indoor installation environments.

Installation and Configuration

The battery features a stackable structure designed to simplify deployment in different installation environments.

The modular configuration supports:

• Space-efficient battery installation

• Flexible system configuration

• Up to 4 battery modules connected in parallel

• Easier capacity expansion

• Integration with compatible PCS equipment

• Local operation and monitoring through the LCD interface

For projects requiring a larger energy storage capacity, multiple modules can be configured in parallel within the specified system limits.

Communication and Control

The system provides dedicated communication interfaces for integration with external energy storage equipment.

PCS Interface: RS485/CAN
BMS Interface: RS485
Remote Transmission: N/A

The communication architecture is designed primarily for local and on-site operation while allowing the battery to exchange relevant operating information with compatible PCS and battery management systems.

Application Scenarios

Home Backup Power

The battery can provide backup electricity for essential household devices during power interruptions.

Typical applications include:

• Wi-Fi routers

• Lighting

• Small refrigerators

• Small household appliances

• Other basic backup loads

Its 5.12kWh capacity provides a practical energy reserve for small-scale residential backup requirements.

Outdoor Camping and Travel

The compact, stackable battery design can be used as an energy storage source for outdoor activities and mobile power applications.

Suitable loads may include:

• Camping lights

• Mobile phones

• Cameras

• Small fans

• Other low-power electronic equipment

It can support power requirements during camping, self-driving trips, picnics, and similar outdoor activities.

Small Off-Grid Power Systems

The 51.2V battery can be integrated with small photovoltaic systems for basic off-grid energy storage.

Potential applications include:

• Rural courtyards

• Mountain cabins

• Remote small facilities

• Small PV-powered systems

• Basic DC power applications

When paired with a suitable PV system and inverter, the battery can store generated energy for later use.

RV and Yacht Auxiliary Power

The battery can also function as an auxiliary energy storage unit for recreational vehicles and yachts.

It can supply stored power to:

• Small onboard appliances

• Lighting systems

• Communication equipment

• Portable electronic devices

• Other auxiliary electrical loads

Its modular and stackable design provides flexibility for mobile energy storage applications where installation space must be used efficiently.

Safety and Compliance

The system is designed according to applicable battery safety and quality requirements.

Reference standards and compliance:

• GB/T36276-2023

• IEC62619

• CE

For transportation safety and international shipping requirements, the battery is certified according to UN38.3.

These standards and certifications provide important references for project evaluation, system integration, transportation, and procurement.

FongPower Support Services

FongPower provides technical support throughout the deployment of its energy storage solutions.

Available support includes:

• Pre-sales technical consultation

• Energy storage system configuration support

• Customized solution design

• Installation guidance

• On-site technical assistance

• After-sales maintenance

• Remote technical support

For industrial, commercial, and customized energy storage projects, FongPower can develop solutions according to specific project requirements and arrange professional technical personnel to support on-site deployment when required.

This service approach helps customers complete system installation efficiently and maintain stable operation after commissioning.

FongPower Energy Storage Solutions

FongPower is a trusted partner for industrial and commercial energy storage solutions, providing smart energy storage technologies designed to support more reliable and sustainable energy applications.