AVAILABLE Q4 2027 • NOW QUOTING
Fortis Series
Fire-Safe, High-C Battery Energy Storage Systems for AI Data Centers & UPS
Stabilizing AI Data Center Power at Millisecond Speed
Fortis stabilizes AI data center power at millisecond speed, bridging the gap between GPU-driven load spikes and slower generator and grid response. Built on EticaAG’s immersion-cooled platform, the Fortis Series includes the Fortis 185 for UPS companion applications, the Fortis 2600AC for high-power generator buffering, and the Fortis 400 for +400 VDC rack architectures. LiquidShield maintains uniform cell temperatures during sustained high-C operation, while HazGuard contains toxic gases at the source for safe deployment in occupied and mission-critical environments.
Why AI Power Systems Fail Without High-C BESS
AI workloads create millisecond-scale power swings that traditional power systems cannot absorb.
Frequency
Instability
GPU load spikes occur in milliseconds, while generators respond over seconds, causing frequency drops that interrupt operations.
Voltage Sag & Equipment Stress
Rapid load increases pull down voltage at the point of delivery, stressing power electronics and reducing system reliability over time.
Generator Overspeed & Shutdown Risk
When load drops suddenly, generators overproduce power, leading to overspeed conditions and potential shutdowns.
How Fortis Stabilizes AI Data Center Power
High-C battery systems absorb rapid load changes before they impact generators, grid infrastructure, or critical equipment.
Millisecond Response to Load Spikes
Absorbs GPU-driven load swings instantly, preventing frequency and voltage instability.
Stable Generator Operation
Allows generators to operate at steady state by eliminating rapid ramping and overspeed conditions.
Sustained High-C Performance
Maintains consistent output under continuous high-rate cycling without thermal derating.
Integrated Fire & Gas Safety
Immersion cooling prevents ignition, while HazGuard contains toxic gases at the source.
Guaranteed Safety from Fire and Toxic Gases
Once excluded for fire and gas risk, lithium-ion batteries are now safe indoors with EticaAG.
Shell Certified Fluid for Battery Storage Applications
Battery Immersion Cooling Technology
Just as many data centers submerge servers in non-conductive liquid, EticaAG’s immersion technology fully submerges every cell in a dielectric liquid, eliminating hot spots, lowering peak temperatures, and reducing thermal stress to slow aging and extend battery life.
Thermal Runaway Containment
LiquidShield isolates and contains thermal runaway events within the single cell, preventing fire propagation and catastrophic failure.
HazGuard Gas Management
Captures and contains off-gases at the module level, routing them to HazGuard where they're converted into inert gases for safe release.
Fortis 185
Fire-Safe Battery Storage for Data Center UPS
- Pairs directly with UPS systems in AI data centers, delivering 185 kWh and 926.6 kW continuous power with native DC connection and zero conversion loss.
- Integrated LiquidShield™ immersion cooling sustains high C-rate operation with uniform cell temperatures and no derating.
- HazGuard™ neutralization contains toxic and flammable gases and converts them into safe, inert compounds before release.
- Module voltage remains below the NFPA 70E arc-flash threshold, enabling PPE-free service and rapid module replacement.
- Designed for indoor deployment in battery rooms, with ≤3 cabinets per fire area under NFPA 855 limits.
| Technical Specs | Fortis 185 |
|---|---|
|
Energy Capacity |
185 kWh |
|
Continuous Power |
926 kW |
|
Peak Power |
~2,200 kW |
|
Battery String Voltage |
712.8 VDC nominal (495–832 VDC) |
|
Output |
Native DC to UPS battery input |
preliminary specifications
Fortis 2600AC
Fire-Safe Battery Storage for Generator Companion Applications
- Designed to pair with generators at large-scale data centers, delivering 2.6 MWh from a single 20-foot container.
- Provides 13.0 MW continuous power and ~31 MW peak power for high-power generator bridging and AI load swings.
- LiquidShield™ immersion cooling maintains consistent thermal performance during high C-rate operation without derating.
- HazGuard™ contains toxic and flammable gases and converts them into safe, inert compounds before release.
- Outdoor enclosure with IP66 rating and integrated fluid loop for demanding site conditions.
| Technical Specs | Fortis 2600AC |
|---|---|
|
Energy Capacity |
2,595 kWh |
|
Continuous Power |
13,000 kW |
|
Peak Power |
~31,000 kW |
|
Battery Voltage |
1,108.8 VDC nominal (770–1,294 VDC) |
preliminary specifications
Fortis 400
Fire-Safe Battery Storage for Future ±400 VDC Data Center Racks
- Optimized for OCP Diablo 400 ±400 VDC sidecar integration
- 12 modules per rack for 224 kWh energy and 1.74 MW of continuous power
- Seamless transition path to 800 V Kyber-style rack architectures via DC/DC interface
- Scalable: 8-12 modules per rack configurable to load and runtime requirements
- LiquidShield immersion ensures uniform thermal performance under peak load
| Technical Specs | FORTIS 400 |
|---|---|
|
Rack Energy Capacity |
223.9 kWh |
|
Rack Max Continuous Power |
1,742.4 kW |
|
Rack Max Peak Power |
2,239.2 kW |
|
Runtime @ Rack Real-World Continuous Power |
9.5 minutes |
|
Nominal Voltage |
518.4 V |
preliminary specifications
Applications
How Data Centers Deploy Fortis
Generator Bridging & Stabilization
Bridges generator response gaps and eliminates rapid ramping, allowing engines to operate at steady state without overspeed or shutdown risk.
AI Load
Stabilization
Absorbs multi-megawatt GPU load spikes in milliseconds, preventing frequency instability and enabling full compute utilization.
Power Quality
Conditioning
Stabilizes voltage and frequency, smoothing transients and harmonics for reliable power delivery to sensitive data center equipment.
Grid-Constrained Deployment
Enables AI capacity deployment without grid upgrades by stabilizing power in hybrid and generator-backed architectures.
Safe. Resilient. Reliable.
Keep Your Data Center Powered, Protected, and Profitable
Let’s design a fire-safe energy storage solution that delivers uptime, savings, and sustainability.