Z-Class
Powering the Future of Defense
At ZEI, we’re not just advancing propulsion—we’re redefining tactical mobility. The Z-Class fuel cell power system merges high performance with battlefield-ready stealth and endurance, designed for mission-critical operations in the most sensor-saturated environments.
Low-Observable Operation
Electrified propulsion minimizes thermal and acoustic footprint, enabling movement in contested or monitored zones.
Combat Grade Power
Instant torque and acceleration that rival traditional combustion engines, ideal for fast-response tactical platforms.
Rapid Refueling
Hydrogen refuels in minutes, extending operational range and reducing downtime in the field.
Extended Endurance
Fuel efficiency and torque delivery comparable to diesel, with none of the acoustic or thermal signature.
The Z-Class Advantage:
Power. Precision. Persistence.
Battlefield-Ready System Components
Four Fuel Cell Stacks: The core of our stealth power generation.
Lithium-Ion Battery: Provides burst power for acceleration and energy redundancy.
Hydrogen Safety Systems: Expert safeguards ensure secure deployment.
Custom Cooling System: Regulates thermal signature and maximizes durability in austere conditions.
Power Electronics & High-Performance Electric Motor: Translates fuel cell energy into quiet, high-torque motion.
ZEI’s Hydrogen Operating Software: Smart controls for adaptive mission profiles and seamless integration.
Mission-Flexible Performance
Designed for land, sea, and expeditionary platforms, Z-Class delivers reliable, stealth-capable energy to power medium- and heavy-duty tactical systems. Whether moving through congested urban terrain or operating deep in denied areas, Z-Class ensures the power to maneuver without compromise.
System Specifications
Power
Peak Power 390 kW (522 hp) Continuous Power 280 kW (375 hp)
Torque
630 Nm (465 lb-ft)
Dimensions
Length 1,950 mm
Width 990 mm
Height 850 mm
System Weight
700 kg (1,540 lbs)
Fuel
Gaseous Hydrogen
Nominal System Efficiency
>50%
Heat Management
Liquid-Cooled (Water-to-Water)
Repowering for the Mission: A Smarter Path to Tactical Readiness
Why scrap proven assets when you can strategically upgrade?
Retrofitting Military Platforms Enables:
Extended Asset Life: Maximize the value of existing vessels and vehicles while reducing logistical waste.
Cost-Effective Modernization: A fraction of the cost compared to acquiring new defense systems.
Rapid Deployment: Accelerate the transition to low-signature energy platforms without long procurement timelines.
Field-Level Accessibility: Makes integration of advanced propulsion feasible for maintenance depots and independent contractors.
Strengthen the Force Through Modernization
For Defense Programs
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.
For Military Contractors & Integrators
Expand Capabilities: Offer hydrogen retrofits as part of modernization and sustainment packages.
Stay Mission-Aligned: Deliver solutions that meet evolving energy mandates and performance requirements.
Unlock New Contracts: Position yourself at the forefront of next-gen defense energy solutions.
For Innovators
Preserve and Enhance: Upgrade legacy platforms without sacrificing performance or historical value.
Experience Stealth Power: Quiet, low-thermal operation meets modern battlefield needs.
Join the Next Frontier: Be part of the shift to smarter, cleaner, and more capable tactical mobility.