The Z-Class Advantage:
One Core Architecture
Two Critical Solutions
Covert Vehicle Power
Stealth-Capable Power for Tactical Operations
Power your vehicles with ultra-low detection emission signatures to advance your mission capabilities.
Advanced Signature Management
Low thermal, acoustic, and chemical emissions for vehicle operation in contested areas. Maintain your presence without being seen.
Continuous Onboard Power
Powers advanced sensors, comms, and surveillance gear without engine idling—supporting extended recon and overwatch missions.
Fast Refueling, Long Endurance
System tanks can be refueled in minutes, supporting sustained field operations without significant downtime while leveraging the extended range of hydrogen systems.
Multi-Domain Flexibility
Optimized for use across ground vehicles, surface craft, UUVs, and mobile support systems.
Z-Class Vehicle Power Systems
ZEI delivers high-performance hydrogen fuel cell powertrains for defense vehicles and vessels where stealth, reliability, and energy independence are mission-critical. Our systems provide silent electric propulsion and onboard power with ultra-low acoustic and thermal signatures — essential for operations where detection equals danger.
Power
Propulsion systems up to 536 hp continuous with 1,400 Nm (1,030 lb-ft) of peak torque
Fuel
Gaseous Hydrogen
Nominal System Efficiency
>50%
Heat Management
Liquid-Cooled
Signature Management
Low-to-no thermal, acoustic, and chemical signature
Minimal noise and vibration for operator safety and reduced maintenance
Next-Gen Stealth Power
Strengthen the Force Through Modernization
Z-class answers challenges of the modern mission. We can help you get stealth power where you need it.
Fleet Upgrades: Convert existing assets to hydrogen power for improved stealth and efficiency.
Operational Edge: Reduce detection risk and fuel dependency in contested zones.
Lower Lifecycle Costs: Gain energy resilience while cutting long-term operational expenses.
Expand Capabilities: Offer hydrogen retrofits as part of modernization and sustainment packages.
Experience Stealth Power: Quiet, low-thermal operation meets modern battlefield needs.
Unlock New Contracts: Position yourself at the forefront of next-gen defense energy solutions.
Preserve and Enhance: Upgrade legacy platforms without sacrificing performance or historical value.
Stay Mission-Aligned: Deliver solutions that meet evolving energy mandates and performance requirements.
Join the Next Frontier: Be part of the shift to smarter, cleaner, and more capable tactical mobility.
Stealth Remote Power
Mission-Ready Energy Where It Is Needed Most
Continuous off-grid energy with near-zero acoustic and infrared output
Advanced Signature Management
Generates power silently—no engine noise, enabling covert operations and minimizing sound pollution in sensitive areas.
Reliable Off-Grid Power
Delivers continuous energy for mission-critical systems even in remote, denied, or grid-disrupted environments.
Modular & Scalable Design
Deploy just one unit or scale up to a complete microgrid using ZEI’s H2OS.
Reduced Fuel Logistics
Eliminates the need for diesel resupply convoys—refuel with clean hydrogen in minutes, or generate it on-site with renewables or electrolyzers.
Z-class Remote Power Systems
Designed for forward-operating bases, command outposts, radar arrays, and critical infrastructure, the Z-Class platform eliminates the noise, heat signature, refueling burden of traditional diesel generators and grid dependent power. Powered by high-efficiency PEM fuel cell technology, Z-Class provides continuous off-grid energy with near-zero acoustic and infrared output—ideal for stealth-sensitive operations and security-focused installations.
Power
Available in configurations from 3.3 - 400 kW
Up to 700 V Architecture
Fuel
Gaseous Hydrogen
Nominal System Efficiency
>50%
Heat Management
Air-to-liquid (liquid-to-liquid available)
Signature Management
Low-to-no thermal, acoustic, and chemical signature
Minimal noise and vibration for operator safety and reduced maintenance
Rapidly-Deployable Systems
Reduced Fuel Logistics
Potable Water Production
