15kWh 48V 300Ah Server Rack Lithium Battery for Home Solar Energy Storage

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

Reliable, Safe, and Scalable Energy Storage for Home Solar Systems

The 15KWh 48V 300Ah server rack–mounted lithium battery bank provides a reliable and flexible energy storage solution for demanding applications. In practice, it supports home solar energy storage systems, microgrids, telecom base stations, and industrial backup power scenarios.

Meanwhile, its compact rack-mounted design and full 15kWh usable capacity allow the system to balance safety, scalability, and intelligent control within a single integrated unit.

With a rated voltage of 51.2V and advanced LiFePO4 cells, this battery delivers reliable long-term performance. As a result, both residential and commercial users can enjoy consistent energy supply and peace of mind.

Key Benefits

Safety-First Design: Cobalt-Free and Fire-Resistant

The 15KWh rack-mounted lithium battery bank features cobalt-free LiFePO4 chemistry, providing strong thermal stability and excellent chemical safety. Consequently, it lowers the risk of thermal runaway compared with traditional lithium chemistries.

In addition, the system integrates a built-in aerosol fire suppression module to enhance protection. This feature further reduces fire risks, which is especially important for residential energy storage environments where safety remains a top priority.

Modular Structure with High Parallel Scalability

The battery uses a standard 19-inch server rack form factor, making installation and system expansion straightforward. Moreover, it allows parallel connection of up to 16 units, enabling users to scale capacity smoothly from small off-grid setups to large commercial energy storage systems.

Thanks to this modular design, users can expand their system gradually without the need to redesign the entire installation.

Intelligent Built-In BMS with Advanced Control

An integrated battery management system (BMS) continuously monitors voltage, current, temperature, and overall system status. Users can connect the BMS to computer software for real-time monitoring and data analysis.

Moreover, the system allows advanced users to adjust communication protocols for different inverter brands. Professional installers can also configure protection parameters such as overcharge limits, over-discharge thresholds, and temperature protection values. However, only trained professionals should modify these advanced settings to ensure safe operation.

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

The 48V 300Ah Lithium battery bank integrates WiFi and Bluetooth modules, allowing users to monitor it easily through an app. Furthermore, remote AOT (over-the-air) upgrades keep the firmware up-to-date automatically. As a result, users can check system status, charge level, temperature, and fault alerts from anywhere using a smartphone or tablet.

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

Our 15KWh 48V 300Ah rack-mounted lithium battery bank comes with a 10-year warranty because we build it using brand new A-grade LiFePO4 cells. Each cell undergoes rigorous testing to guarantee top-tier performance and safety. By selecting only the highest quality cells, we ensure the reliability and long-term durability of the battery system.

We intentionally avoid using B-grade or C-grade cells, even though they could reduce costs and lower the price of our 48V 300Ah home energy storage system. The reason is clear: unreliable cells compromise the safety and trustworthiness of the entire product, no matter how well-designed it may be.

Ultimately, home energy storage is about more than just power—it’s about safety, stability, and peace of mind. That’s why we remain fully committed to using only Grade-A LiFePO4 cells, delivering outstanding performance and a long-term warranty you can rely 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:

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 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 48 Volt 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.