HydrogenCube™ Gas Storage Bundles

Features

No downtime

Empty units are easily swapped with full units

Compatible

Use with any fuel cell, compressor, or electrolyzer

Cost-efficient

Much lighter and less expensive than batteries for equal energy storage

Reliable

Enables plug-and-play fuel cells for remote and/or off-grid locations

Compact

Easily loaded or unloaded using standard trucks

Safe

Fully plumbed drop & swap solution

Steelhead Composites HydrogenCube™ Bundles offer safe, cost-effective, lightweight, and portable compressed hydrogen gas storage system. Once empty, the system is easily swapped for a full unit and transported for refill at the closest station.

A Single HydrogenCube Bundle will:

Recharge a small fleet of electric vehicles
Store enough energy to power a small home for a month
Provide backup power for life support systems

Durability and Reliability

These pressure vessels are designed, developed, and tested in-house — offering a design optimized for:

Target cycle life — 30+ years useful life
Lightweight — Roughly 1/4 to 1/5 the weight of traditional steel tanks
Safe — Predictable leak-before-burst failure mode
Corrosion-Resistant Materials:
- Stainless Steel head
- Aluminum (Type III) or Polymeric (Type IV) liner
- Carbon fiber shell
- Additional UV and marine-compatible coatings are available
Proven superiority against drop and impact damage
Minimal permeation of hydrogen at its maximum operating pressure
Wide operating temperature range — from -40°C to 85°C (-40°F to 185°F)

Model	Capacity	Operating Pressure
Hydrogen Cube™ Bundle	Up to 56 kg	345 Bar (5,000 psi)

For larger volumes of hydrogen storage, see our HydrogenCube™ Containerized Storage Systems.

Bundle Replacement Model

Distributed grid model — own the cubes and fuel cell, bill customers at a per kWh rate for electricity used
Bundle replacement model — own the cubes, customer buys fuel cell, bill customer per kg of hydrogen used
Customer owned model — customer owns cubes and fuel cell, swap cubes with filled cubes when empty at fixed cost

HydrogenCube 2x2 Horizontal on a flatbed truck

Certifications

Pressure Vessels:

US DOT (per UN/ISO 11119-2)
CE-PED – Module B and D
DNV Technology Certificate

HydrogenCube™ Bundle:

US-DOT-SP (Pending)
ASME (Pending)