Can this 12V sodium-ion battery replace a lead-acid starting battery?

It can be used as a replacement in compatible starting applications. Before replacement, check the CCA, battery dimensions, terminal layout, charging voltage, and operating temperature .

How does this sodium-ion battery perform in cold weather?

It retains more than 80% capacity at −20°C and supports discharge operation down to −30°C , making it suitable for cold-weather starting applications.

Can I use an existing 12V lead-acid charger?

Compatibility depends on the charger's output voltage and charging profile. Check that the charger is suitable for the battery's 15.6V recommended charging voltage before use.

How long does this 12V 100Ah sodium-ion battery last?

The battery supports ≥2,500 cycles at 1C, 100% DoD and ≥4,000 cycles at 0.2C, 100% DoD under specified test conditions.

Does this sodium-ion battery have a built-in BMS?

Yes. The integrated BMS provides protection against overcharge, overdischarge, overtemperature, and short circuits , while supporting cell balancing.

51.3V 50Ah Sodium ion Battery for Energy Storage

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51.3V 50Ah Sodium ion Battery for Energy Storage

2.565kWh Nominal Energy
Up to 100A Discharge Current
8000-Cycle Design
OEM solutions to satisfy specific power needs


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Product Description

51.3V 50Ah Sodium Ion Battery for Energy Storage

The Polinovel 51.3V 50Ah rack-mounted sodium ion battery provides 2.565kWh of nominal energy in a compact module designed for backup power and modular energy storage applications.

With up to 100A discharge current, an 8,000-cycle design under specified test conditions, and discharge operation down to -40°C, it provides a flexible battery option for residential storage, communication backup and low-temperature power applications. Up to 20 batteries can be connected in parallel for greater system capacity.

2.565 kWh

Nominal Energy

8,000 Cycles

0.5C / 90% DOD / 25±2°C

-40°C

Minimum Discharge Temperature

20 Units

Maximum Parallel Connection

Why Choose This 51.3V 50Ah Sodium-Ion Battery?

Compact Rack-Mounted Design

The 2.565kWh battery module combines energy storage capacity with a compact rack-mounted structure, making it suitable for installations where system space and modularity matter.

High-Rate Discharge

Supports up to 100A maximum discharge current, providing stable power delivery for backup and energy storage applications with changing load demands.

Low-Temperature Discharge

Designed for discharge operation from -40°C to 60°C, extending battery usability in colder environments where temperature can limit conventional battery performance.

Flexible Parallel Expansion

Connect up to 20 battery modules in parallel, allowing storage capacity to be expanded as backup duration or energy requirements increase.

Specification

Model	NA5150
Nominal Voltage	51.3V
Nominal Capacity	50Ah
Energy	2565Wh
Charge Voltage	60V
Discharge Cut-off Voltage	39.6V
Charge Current	≤50A
Constant Discharge Current	100A
Cycle Life	8000 cycles (0.5C, 90% DOD, 25±2°C)
Dimension	440550140 mm
Weight	45kg
Communication	CAN / RS485 / WiFi
Parallel Connection	Up to 20 units
Humidity	15–85% RH
Charge Temperature	0~55ºC
Discharge Temperature	-40~60ºC
Storage Temperature	-20~60ºC
Operating Altitude	<3000m
Protection Rating	IP20
Cooling Method	Natural Cooling
Installation Environment	Indoor
Certifications & Documents	UN38.3 / MSDS / CE

Battery Protection for Reliable Operation

Multiple protection functions help support stable and reliable battery operation under different operating conditions.

Voltage Protection

Overvoltage and undervoltage protection

Temperature Protection

Temperature monitoring and protection

Short-Circuit Protection

Protection against abnormal short-circuit conditions

Communication Fault Protection

Protection against communication failure

Build Capacity in Smaller Steps

Flexible scalability to match your project needs.

Nominal energy calculated from 2.565kWh per battery. Actual system configuration should be confirmed according to inverter and project requirements.

Sodium-Ion Battery Applications

Home Energy Storage

Provides compact battery storage for residential backup and energy management applications, with modular expansion for changing household energy requirements.

Telecom Backup Power

Supports backup power applications for communication equipment where reliable battery discharge and long service life are required.

Low-Temperature Applications

The -40°C minimum discharge temperature makes the battery suitable for energy storage and backup applications exposed to colder operating environments.

Computing & IT Backup

Provides modular battery backup for computing and IT equipment where stable power availability and scalable capacity are important.

50Ah vs 100Ah vs 170Ah Comparison

Compare 50Ah, 100Ah, and 170Ah sodium ion batteries for energy storage to find the right balance of capacity, power, installation space, and future expansion.

Comparison	51.3V 50Ah	51.3V 100Ah	51.3V 170Ah
Nominal Capacity	50Ah	100Ah	170Ah
Energy per Battery	2.565 kWh	5.13 kWh	8.72 kWh
Max. Charge Current	50A	100A	150A
Max. Discharge Current	100A	200A	200A
Dimensions	440 × 550 × 140 mm	560 × 800 × 140 mm	440 × 780 × 235 mm
Weight	45 kg	80.5 kg	125 kg
Best Fit	Lower-capacity modular storage	Balanced capacity & power	Higher energy per battery

Polinovel Sodium-ion Battery Benefits

Polinovel Sodium ion Battery for Starting

Top-Grade Battery Cells

Built with high-quality sodium-ion cells, our batteries deliver outstanding advantages—including fast charging efficiency, zero maintenance, and exceptional performance in low-temperature environments.

Exceptional Performance

With superior charge/discharge rates and outstanding low-temperature capabilities, our sodium-ion batteries are perfectly suited for demanding applications such as car starting, marine starting, motorcycle starting, etc.

Long Cycle Life

Polinovel sodium-ion batteries feature excellent deep cycle performance, delivering consistent and reliable power over their service life. Their durability makes them a smart choice for applications that demand long-lasting power.

Reliable Product Warranty

As a trusted battery supplier, Polinovel offers a comprehensive warranty that guarantees both performance and longevity, ensuring you can rely on the quality and durability of Polinovel batteries with complete peace of mind.

Built-in BMS Protection

Over Charge/Discharge Protection

Monitors the battery voltage and ensures that it does not exceed or fall below a certain value to prevent over charge/discharge.

Temperature Protection

Monitors the temperature of each cell and protects the battery if the temperature exceeds/goes below a preset threshold.

Short Circuit Protection

Interrupts the flow of electricity to prevent any further damage after detecting a short-circuit.

Cell Balancing

Ensures all the cells are kept at the same voltage or SOC and helps to extend the life of the battery.

Polinovel Promises

High-performance Battery Solutions

Our team of experts thoroughly analyzes market needs and actively explores new technologies to create innovative battery solutions. Our battery products are manufactured using state-of-the-art technology and strict quality control measures to ensure they offer superior performance and great reliability.

Quality Assurance

As a reliable battery manufacturer, we offer products that meet global standards. Our battery products are certified with CE, MSDS, RoHS, and UN38.3 certifications. When you opt for our products, be assured that quality and safety is our utmost concern.

Exceptional Customer Service

Our commitment is to provide excellent customer service from beginning to end. Our team has a wealth of experience and is focused on providing the most satisfying experience for our customers. We offer quick and effective service, whether it's responding to product inquires, assisting with orders, or dealing with technical issues.

On-time Delivery

As an experienced battery supplier in the industry, we have an exceptional supply chain system and fast logistics. We are committed to providing efficient delivery to ensure that our customers receive their orders on time.

Sodium-Ion Battery FAQs

Q Can this 12V sodium-ion battery replace a lead-acid starting battery?

A It can be used as a replacement in compatible starting applications. Before replacement, check the CCA, battery dimensions, terminal layout, charging voltage, and operating temperature.
Q How does this sodium-ion battery perform in cold weather?

A It retains more than 80% capacity at −20°C and supports discharge operation down to −30°C, making it suitable for cold-weather starting applications.
Q Can I use an existing 12V lead-acid charger?

A Compatibility depends on the charger's output voltage and charging profile. Check that the charger is suitable for the battery's 15.6V recommended charging voltage before use.
Q How long does this 12V 100Ah sodium-ion battery last?

A The battery supports ≥2,500 cycles at 1C, 100% DoD and ≥4,000 cycles at 0.2C, 100% DoD under specified test conditions.
Q Does this sodium-ion battery have a built-in BMS?

A Yes. The integrated BMS provides protection against overcharge, overdischarge, overtemperature, and short circuits, while supporting cell balancing.