EticaAG Launches the Fortis Series: The First Immersion-Cooled, Fire-Safe NMC Energy Platform for ±400 VDC Racks and UPS Systems

Engineered for absolute safety and performance, Fortis eliminates fire and gas hazards while delivering industry-leading power density for next-generation data centers.

 

Powering Modern Data Centers

EticaAG, a leader in immersion-cooled, fire-safe Battery Energy Storage Systems (BESS), today announced the launch of its new Fortis Series, introducing two breakthrough products engineered to redefine power safety and performance in data centers.

The Fortis Sidecar and Fortis 400 Rack are built on EticaAG’s proprietary immersion-cooled NMC platform, offering unmatched power density, thermal stability, and fire safety. Together, they establish the first commercial product line capable of serving both traditional UPS systems and modern DC-voltage rack architectures such as OCP Diablo 400.

 

More Power, Less Space, No Fire Risk

Fortis replaces the limitations of conventional lithium chemistries with a high-rate NMC design, immersed in dielectric fluid and engineered for safe indoor operation. The system’s LiquidShield™ immersion cooling and HazGuard™ gas-mitigation technologies eliminate ignition and toxic off-gassing risks. This allows high-energy NMC cells to operate safely inside the white space for the first time.

Compared with conventional air-cooled LFP chemistries, Fortis delivers significantly higher power density and superior thermal control, giving operators greater flexibility in system layout, rack design, and space utilization.

 

Two Launch Configurations, One Platform

Two fire-safe configurations built for UPS and ±400 VDC rack architectures.

Fortis Sidecar: For UPS Systems

Designed for data centers using existing UPS systems that need higher power and longer bridge time, the Sidecar connects directly to the UPS DC bus. Each unit delivers up to 233 kWh per rack, >330 kW continuous, and up to 600 kW peak output for short-duration surges. The system provides up to 30 minutes of runtime at 80% Depth of Discharge (DoD), offering over triple the energy capacity of conventional UPS battery strings.

Fortis 400: For 400+ VDC Racks

Purpose-built for ±400 VDC rack architectures such as OCP Diablo 400, this variant integrates immersion-cooled modules using Tier 1 High-Power cells. The rack delivers ≈224 kWh total energy and 1.74 MW continuous / 2.48 MW peak power, providing 45–90 seconds of ride-through at full rack load. The design also includes a path to 800 V Kyber-class systems through an isolated bidirectional DC/DC interface, future-proofing the platform for next-generation rack voltages.

 

Guaranteed Safety from Fire and Toxic Gas

Every battery cell in Fortis modules is fully immersed in Shell Certified Battery Dielectric Fluid — a non-conductive, non-toxic, and readily biodegradable liquid that prevents ignition and ensures consistent temperature control. In the event of a cell fault, the HazGuard™ system captures and neutralizes any gas emissions, safely venting only inert air.

Each Fortis system integrates an advanced Battery Monitoring System (BMS) that continuously tracks cell performance, temperature, and health parameters, ensuring proactive protection and optimal efficiency alongside LiquidShield™ and HazGuard™ technologies.

“Fortis makes NMC viable inside the white space for the first time,” said Jaime Hidalgo, CEO of EticaAG. “With the Fortis 400 and Sidecar, we’re giving data centers two safe, scalable paths to higher power density and true operational resilience.” 

 

ITC & FEOC Compliant

The Fortis Series is battery-agnostic, offering a U.S.-manufactured 21700 cell option that meets both ITC and FEOC compliance requirements.

All Fortis configurations are FEOC-compliant, while the Forge Nano is U.S. Department of War approved, providing an enhanced U.S. cell option that qualifies for ITC incentives under domestic content standards.

“Our goal is to combine innovation, safety, and compliance,” said Matthew Ward, President of EticaAG. “Fortis delivers advanced NMC performance with full immersion safety in a platform designed, built, and supported in the United States.” 

 

Fortis Series Highlights

  • Fire-Safe NMC Chemistry: High-power density with LiquidShield™ immersion and HazGuard™ gas containment.

 

  • High Performance: Up to 2.48 MW peak per rack (Diablo 400 compatible configuration).

 

  • Extended Runtime: Up to 30 minutes @ 80% DoD (UPS Sidecar).

 

  • Thermal Stability: Uniform cell temperature <3 °C temperature delta under peak load.

 

  • Scalable Design: Racks and sidecars can be paralleled to multi-megawatt systems.

 

  • Serviceability: Front-access, hot-swappable modules minimize downtime.

 

  • Compliance: UL 1973 / 9540 / 9540A / UN 38.3 / CISPR 32 / 35 design.