Best 51.2 V 100ah Lifepo4 Battery-Why Choose OneSun? OEM & ODM Lithium Battery Manufacturer
Jan 04, 2026
In today's era of accelerated energy transition and continuously rising demand for renewable energy, 51.2V 100Ah LiFePO4 batteries have become core power units for home energy storage, photovoltaic systems, commercial UPS, and even electric equipment. These batteries are highly sought after in the global market due to their high safety, long cycle life, stable performance, and environmental friendliness. Among numerous battery suppliers, ONESUN is undoubtedly a leading choice in the industry, offering a partner with quality, customization capabilities, and a global service network.
I. What is a 51.2V 100Ah LiFePO4 Battery?
A 51.2V 100Ah LiFePO4 battery is a lithium battery pack based on the lithium iron phosphate (LiFePO4) chemical system. It has a nominal voltage of approximately 51.2 volts, a capacity of 100 amp-hours, and a total energy equivalent to approximately 5.12 kWh. This type of battery is commonly used in solar energy storage, power backup, and electric device energy systems. Compared to traditional lead-acid batteries, it offers higher safety, lower risk of thermal runaway, longer cycle life (typically exceeding 6000 cycles), lighter weight, and higher energy efficiency.
These advantages of LiFePO4 batteries make them one of the most popular choices for home and industrial energy storage systems. Whether used as a backup power source for grid outages in home photovoltaic systems or as the core of off-grid power supply, the 51.2V 100Ah battery provides a stable and continuous power output.
II. ONESUN – The Best Partner for Customized Batteries Worldwide
Founded in 2014, ONESUN is a brand specializing in photovoltaic energy storage and lithium battery system solutions. With its strong R&D capabilities and comprehensive manufacturing system, ONESUN has earned the widespread trust of customers worldwide. ONESUN boasts its own R&D team and multiple production lines, providing customers with OEM/ODM battery pack services ranging from standard products to deeply customized solutions.
| Electrical Specifications | |
|---|---|
| Nominal Voltage | 51.2 V |
| Rated Capacity | 100 Ah |
| Energy Capacity | 5120 Wh (5.12 kWh) |
| Cell Configuration | 16S (16 cells in series) |
| Cell Chemistry | Lithium Iron Phosphate (LiFePO4) |
| Charge Voltage | 58.4 V (3.65V per cell) |
| Float Charge Voltage | 54.4 - 55.2 V |
| Cut-off Voltage | 44.8 V (2.8V per cell) |
| Standard Charge Current | 50 A (0.5C) |
| Maximum Charge Current | 100 A (1C) |
| Standard Discharge Current | 100 A (1C) |
| Maximum Discharge Current | 200 A (2C) continuous, 300 A (3C) peak (5s) |
| Cycle Life (80% DOD) | > 4000 cycles |
| Internal Resistance | < 50 mΩ |
| Self-Discharge Rate | < 3% per month |
| Physical & Environmental Specifications | |
|---|---|
| Dimensions (L x W x H) | Approx. 442 x 420 x 133 mm (varies by manufacturer) |
| Weight | Approx. 45-55 kg |
| Enclosure | IP65 rated (typical), metal or plastic case |
| Terminal Type | M8 bolts or heavy-duty copper lugs |
| Operating Temperature (Charge) | 0°C to 55°C (32°F to 131°F) |
| Operating Temperature (Discharge) | -20°C to 60°C (-4°F to 140°F) |
| Storage Temperature | -20°C to 45°C (-4°F to 113°F) |
| Humidity | 5% - 95% RH (non-condensing) |
| Protection & Communication Features | |
|---|---|
| Battery Management System (BMS) | Integrated with cell balancing |
| Protection Functions | Overcharge, Over-discharge, Over-current, Short-circuit, High/Low temperature |
| Communication Interface | RS485, RS232, CAN Bus (depending on model) |
| Communication Protocols | Modbus RTU, CAN 2.0B (typical) |
| Monitoring Parameters | Voltage, Current, Temperature, SOC, SOH, Cycle count |
III. Professional OEM/ODM Capabilities – Tailoring Optimal Solutions for Customers
ONESUN's OEM (Original Equipment Manufacturing) and ODM (Original Design Manufacturing) services are a significant competitive advantage globally:
1. Multi-Specification Customization
Beyond standard 51.2V 100Ah batteries, ONESUN can customize different voltages, capacities, and appearance designs according to application scenarios, including non-standard sizes, different connection interfaces, and even integrated designs of entire energy storage systems.
2. Quality and Safety as the Core
All ONESUN batteries use industry-leading Grade A LiFePO4 cells and integrate an advanced intelligent BMS (Battery Management System), providing comprehensive protection under overcharge, over-discharge, overcurrent, and short-circuit conditions, ensuring long-term stable and safe operation from the source.
3. Extensive Industry Experience
ONESUN's products have been exported to over 70 countries and regions worldwide, with completed projects exceeding 3GW. This means its solutions are suitable not only for residential users but also for complex scenarios such as industrial and commercial energy storage power stations.
4. Rapid Response and Professional Service
Whether customers require standard models or customized solutions, ONESUN provides professional consultation and rapid technical response, helping to create professional battery solutions throughout the entire process from product selection-design-factory manufacturing-subsequent testing and delivery.
IV. Wide Applications and Significant Value
Leveraging the superior performance of the 51.2V 100Ah LiFePO4 battery and ONESUN's years of industry experience, this type of battery plays a crucial role in multiple fields:
* Residential and Commercial Photovoltaic Energy Storage: Works with inverters and solar modules to store solar energy during the day and supplement power at night;
* UPS and Backup Power: Provides critical power support, ensuring stable operation of the system;
* New Energy Equipment and Light Electric Vehicles: Such as golf carts, AGV robots, etc.;
* Industrial and Data Centers: Used for emergency power supply and balancing load energy fluctuations.
In today's increasingly diversified energy solutions, the 51.2V 100Ah LiFePO4 battery, with its high performance and high reliability, has become the preferred core component for many energy storage and power systems. As a renowned brand combining quality, innovation, and global service capabilities.
ONESUN provides unparalleled OEM/ODM customized battery pack solutions to customers worldwide. Whether it's standard products or deeply customized system solutions, ONESUN leverages its strength and expertise to help customers achieve outstanding energy application value and contribute to the popularization of clean and low-carbon energy.
Article Source: Lithium battery manufacturer - ONESUN China
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