Immersion-Cooled Battery Energy
Storage System (BESS)

4 MWh | Fire-Resistive | Grid-Supportive | Data-Centers

Overview

Ohmitron’s 4 MWh Immersion-Cooled BESS delivers safety, efficiency, and compactness in a 20-ft container. It uses dielectric immersion cooling for superior fire resistance, extended lifespan, and enhanced grid flexibility. Designed for outdoor deployment, it supports the demanding energy needs of modern data centers and edge facilities. A 40-ft container version expands this capability with integrated immersion-cooled infrastructure specifically tailored for data center applications. The system includes pre-configured racks, power distribution, cabling, monitoring, fire suppression, and security. Its advanced architecture ensures exceptional thermal performance using eco-friendly coolant. Engineered for durability, it withstands seismic activity, dust, wind, and water for reliable operation in harsh environments.

Key Features

Immersion Cooling

Each battery module is immersed in dielectric fluid (S5X) for optimal thermal control and fire safety.

Fire Suppression

Smoke/H₂ detection, inert cooling fluid, and emergency shutdown ensure safety per UL 9540A and IEC standards.

Smart Monitoring

Distributed BMS with SOC/SOH tracking, touchscreen HMI, and remote SCADA/cloud integration.

High Capacity

Delivers 4 MWh in a compact IP65-rated 20-ft container with IP67 module enclosures.

Technical Specifications

Parameter

Value

Cell Type

LFP (Lithium Iron Phosphate)

Rated Energy

4073.47kWh

Rated Voltage

1331.2 VDC

Type

Immersion (S5X dielectric fluid)

Total Coolant Volume

~1000 L

BMS Accuracy

SOC ±3%, SOH ±5%

Certifications

UL 9540A, UL 1973, IEC 62619, UN38.3

Size

20-ft High Cube ISO

Temp Range

-25°C to +55°C