15kWh 48V 300Ah Rack-Mount LiFePO4 Battery for Home Solar Energy Storage and Backup Power

Description

15KWh 48V 300Ah Server Rack Mounted Lithium Battery bank

Reliable, Safe, and Scalable 15KWh Lithium Rack-Mounted Battery for Home Solar Energy Storage Systems

The 15KWh 48V 300Ah server rack lithium battery bank is a powerful and flexible energy storage solution built for demanding applications such as home solar energy storage systems, microgrids, telecom base stations, and industrial backup power. Designed with 15KWh of capacity, this rack-mounted lithium battery combines safety, scalability, and intelligent monitoring in a compact format.

With 51.2V rated voltage and cutting-edge LiFePO4 cells, this battery provides long-term reliability and peace of mind for both residential and commercial users.

Key benefits

Safety First: Cobalt-Free & Fire-Safe

This 15KWh lithium rack-mounted battery uses cobalt-free LiFePO4 chemistry, known for its thermal and chemical stability. To enhance safety, it is equipped with a built-in aerosol fire extinguisher, minimizing fire risk and making it an ideal choice for home solar energy storage systems where safety is paramount.

Modular Flexibility & Parallel Scalability

Designed with a server rack mounted modular form factor, this battery supports parallel connection of up to 63 units. Whether you’re building a small off-grid setup or a large-scale commercial system, you can scale voltage and capacity effortlessly to meet your specific application requirements.

Advanced Built-in BMS

the built-in battery management system (BMS) can be connected to computer software for monitoring the battery’s status and other pack information. Additionally, users can define customized functions, and easily adjust BMS communication protocols for different inverters. Professional users have the ability to set various protection values, such as overcharge, over-discharge, and temperature thresholds. However, these advanced settings should only be adjusted by professional users with the necessary knowledge and expertise

Applications include:

Home solar energy storage systems
Microgrid energy storage
Telecom backup power
Off-grid cabins and smart homes
UPS and data center backup systems

Proven Reliability & Long Lifespan

Built with 48V 300Ah deep-cycle LiFePO4 lithium battery cells, this 15KWh rack-mounted lithium battery delivers over 6,000 charge-discharge cycles at 1C, ensuring stable long-term performance. It’s engineered for over 15 years of design life under normal temperature conditions (25°C/77°F), making it a sustainable and cost-effective solution.

Smart Monitoring and Remote Management

Integrated WiFi and Bluetooth modules enable app-based monitoring, while remote AOT (over-the-air) upgrades ensure your battery firmware stays up-to-date. Users can easily check system status, charge level, temperature, and fault alarms from anywhere using a smartphone or tablet.

10-Year Warranty – Built on Premium A-Grade LiFePO4 Cells

We offer a 10-year warranty because our 15KWh 48V 300Ah rack-mounted lithium battery bank is built using brand new A-grade LiFePO4 cells—each cell is rigorously tested to ensure top-tier performance and safety. We only select the highest quality cells, and that’s why we have full confidence in the reliability and longevity of our battery system.

We deliberately do not use B-grade or C-grade cells, even though they would significantly reduce costs and lower the price of our 48V 300Ah home energy storage system. The reason is simple: if the battery cells are unreliable, the overall product—no matter how well designed—becomes unsafe and untrustworthy.

Home energy storage is not just about power—it’s about safety, stability, and peace of mind. That’s why we are fully committed to using only the Grade-A Lithium LiFePO4 cells, delivering outstanding performance, and providing a long-term warranty you can count on.

Factory Price

Egbatt is an original manufacturer of high-quality lithium batteries for a variety of applications, including off-grid solar power systems, electric vehicles, and more. As a manufacturer, Egbatt is able to provide low prices for distributors based on bulk quantity orders, making it a great choice for businesses and individuals looking to purchase high-quality lithium batteries at an affordable price.

Server Racks and Network Cabinets

This 15KWh 48V 300Ah rack-mounted lithium battery bank can be optionally paired with our custom-designed rack enclosure. Built to standard 19-inch specifications, the cabinet is specially designed for rack-mounted energy storage batteries. Please contact our sales team for more details—we can customize the rack size based on your battery order quantity.

Specification:

Download

 The six questions often be asked:

2. Why is this 15kWh 48V 300Ah Server Rack Lithium Battery labeled both 48V and 51.2V? What’s the Real Voltage?

This LiFePO4 battery is commonly referred to as 48V, but its actual nominal voltage is 51.2V. Here’s a full breakdown for better understanding:

Battery Cell Configuration: Uses 16 Lithium LiFePO4 cells in series (16S)

Each cell has a nominal voltage of 3.2V, so 3.2V × 16S = 51.2V nominal

3. Why the 51.2V 300Ah rack battery Called 48Volt:

“48V” is an industry standard label that groups all battery systems with nominal voltages around 48V (typically 48V, 50.4V, or 51.2V). This helps simplify inverter and system compatibility. Most hybrid or off-grid inverters are labeled as “48V systems,” and this battery is 100% compatible with them.

The 48V 300Ah server rack battery actual Nominal Voltage is 51.2V. Common Industry Label: 48V (for system compatibility), Charge Voltage Range: 40V – 58.4V. Works with any 48V-rated inverter or solar system

So don’t worry — when you see either “48V” or “51.2V,” they are referring to the same battery, just from different perspectives (system vs technical). If you’re connecting to a 48V solar inverter, this battery will work perfectly.

4. How long can the 15KWh 51.2V 300Ah LiFePO4 rack-mounted battery supply power? How to calculate it?

the 15kWh 51.2V 300Ah LiFePO4 rack-mounted battery can supply power for different durations depending on the total power consumption of your appliances. To calculate how long it can power your equipment, you can use this basic formula:

Backup Time (in hours) = Battery Capacity (Wh) ÷ Load Power (W)

Let’s break it down:

Your rack-mounted Lithium battery has a voltage of 51.2V and a capacity of 300Ah. Multiplying the two gives you the total energy:

51.2V × 300Ah = 15,360Wh, or 15.36kWh.

So, this battery can theoretically deliver 15.36 kilowatt-hours of energy.

Now, the amount of time it can last depends on how much power your devices are using. For example:

If your load is 3000 watts, the battery would last approximately 5.1 hours (15.36 ÷ 3000).

If the load is 2000 watts, it would last around 7.7 hours.

At 1000 watts, it would run for about 15.36 hours.

However, in real-world use, you also need to consider the efficiency of the inverter, which typically ranges from 85% to 95%. Assuming 90% efficiency, the usable energy is closer to 13.8kWh. So if you’re using 1200 watts of power, for instance, the actual runtime would be about 11.5 hours (13.8 ÷ 1200).

In summary, the more power your devices use, the shorter the battery will last. If you can tell me what appliances you plan to use and how many watts each one consumes, we can give you a more accurate estimate.

5. How does the 15KWh Rack-Mounted Lithium Battery Work with the Inverter?

1） DC Energy Storage Battery

The 48Volt 300Ah LiFePO4 server rack-mounted battery is a DC (Direct Current) energy storage unit, rated at 51.2V nominal voltage. It stores electricity from sources like solar panels, the utility grid, or a diesel generator.

2） The Role of the Inverter: DC to AC Conversion

An inverter is the central brain of any energy storage system. It converts the DC power stored in the lithium battery into AC (Alternating Current) power, which is used by home appliances and other electrical loads. For example:120V/240V for the U.S. 220V/230V for Europe, Asia, and other regions.

3） Connection Between Battery and Inverter

Power Connection:
The battery connects directly to the inverter through its positive (BAT+) and negative (BAT−) terminals, ensuring correct voltage compatibility (48V system).
Communication Interface (Optional but Recommended):
The battery also includes CAN or RS485 communication ports that allow it to “talk” to the inverter in real time. This enables features like: Real-time charge/discharge control; Battery status monitoring (SOC, voltage, current, temperature); Fault detection and protection; Optimized charging behavior

4） Charging and Discharging Process

During Daytime / Solar Charging, the solar panels generate DC power.The inverter’s MPPT controller charges the battery.Once the battery is full, charging stops automatically
During Home Power Consumption: the inverter draws DC power from the battery. It converts DC into AC power to supply home loads. If the battery is low, the inverter can switch to grid or generator.

5） Compatible with Most 48V Hybrid Inverters

Thanks to its standard 48Volt system design and universal communication protocols (RS485/CAN), this 15KWh lithium rack-mounted battery works seamlessly with most popular inverter brands on the market, including: Growatt, Victron Energy, Deye / SunSynk, Luxpower, Voltronic. EG4 / Sol-Ark and many others

6. After payment, how long will it take to receive the rack-mounted 15KWh battery?

Once we receive your payment, we will start arranging production, testing, and system calibration. This process typically takes around 15 to 20 days. After that, the 15KWh 48Volt 300Ah server rack battery system will be shipped out, and the sea shipping time is approximately 25 to 30 days, depending on the destination port and customs clearance.

So in total, you can expect to receive the 15KWh rack-mounted battery roughly 40 to 45 days after payment.

What can EGBATT do?

• High Quality Products
  DDP Service( no additional charges. It’s just the shipping fee)
  Friendly and Professional Customer Service
  Solar system solution design
  Factory price support both retail and wholesale dealers, we strive to offer the most competitive prices in the market without compromising on quality.
  The battery is carefully packaged to ensure it remains undamaged during transit

Upon receiving the battery, we recommend first contacting a local professional electrician for installation. Detailed installation instructions are included with the 48V300Ah rack-mounted battery to assist the electrician in completing the work more efficiently.

If you have difficulty accessing an electrician in your area and possess basic electrical knowledge, we offer professional video installation guidance services. Please contact your designated sales representative to arrange remote assistance from our technical team via video call.

OEM/ODM Service:

We offer OEM (Original Equipment Manufacturer) and ODM (Original Design Manufacturer) services, allowing us to customize our products to your specific requirements. This enables you to have a product that perfectly fits your needs and brand identity.

Inquiry:

If you need this type of battery or have any questions about it, please fill out the following form. Our sales staff will contact you immediately.