Heiwit presents the new sodium ion BESS: the ideal choice for data centres

We are excited to announce the launch of our new BESS (Battery Energy Storage System) energy storage systems at the sodium ions, designed to meet the increasingly complex needs of the data centre modern.
The exponential growth of data traffic and the growing commitment to sustainability make efficient, secure and cost-effective storage solutions indispensable.
Our sodium ion systems offer a revolutionary alternative to traditional lithium batteries, providing high performance a a lower cost than the 40%.

Why choose Heiwit's sodium ion BESS?

In addition to significant cost savings, our systems are designed to offer:

• Increased securitythanks to an advanced liquid-cooled thermal management system and multi-level fire protection.

• Exceptional durabilityover 4000 cycles with a calendar life of more than 10 years.

• Sustainabilityno use of critical or high-impact materials such as cobalt.

• Reliability even under extreme environmental conditions (-30°C ~ 50°C operating temperature).

Main technical specifications

The new system is based on a highly integrated and easy-to-install 20-foot container housing high-capacity sodium ion batteries:

• Total rated capacity1.08864 MWh

• Battery configuration9 clusters, each consisting of four 210Ah/3.1V battery packs (48 cells in series)

• System voltage range420V to 1497.6V

• Rated discharge power1 MW (0.5P)

• Cooling system: a liquid, with temperature control between 18°C and 23°C

• Weight of the complete container33 tonnes.

Sodium ion cell performance

Each cell offers:

• Nominal capacity: 210Ah

• Rated voltage: 3.1V

• Maximum discharge current: 1C

• Life cycle4000 cycles with remaining capacity at 70%

• Operating temperature range-30°C to 60°C

Advanced Management System (BMS)

The BESS Heiwit is equipped with a Multilayer BMS distributed architecture, which monitors:

• Voltages and temperatures of individual cells.

• State of Charge (SOC) and State of Health (SOH) in real time.

• Charge/discharge current and insulation to earth

The system has CAN, RS485, Ethernet communication and supports standard protocols such as Modbus and IEC61850, ensuring maximum interoperability.

Fire protection and safety

Our system adopts a multi-layered protection strategy:

• Automatic fire extinguishing aerosols on each battery pack.

• Complete gas extinguishment in the event of an advanced fire.

• Integrated emergency sprinkler system

• Direct communication with the BMS management system for immediate fault detection.

Conclusions

With superior efficiency, increased operational safety, real environmental sustainability and reduced costs of 40% compared to lithium systems, the new sodium-ion BESS from Heiwit is the perfect solution for providing continuous, secure and cost-effective power to the data centres of the future.