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Home
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PEM Stacks

PEM Fuel Cell Stack G-5

Siltrax Pty Limited
PEM Fuel Cell Stack G-5
PEM Fuel Cell Stack G-5
PEM Fuel Cell Stack G-5
Summary

  • High performance water-cooled PEM stack using Siltrax's proprietary Silicon-based Bi-Polar Plate (Si-BPP) technology
  • Rated power 6.2kW @ 0.65V
  • Compact product designed for low balance-of-plant designs (i.e., low pressure operations)
  • Core volumetric power density of 3.4kW/L and mass power denisty of 2.4 kW/kg (at 0.2 barg inlet pressure!)
  • Designed for applications requiring ultra-lightweight, high-efficiency operation, including small unmanned aerial vehicles (UAVs), portable and distributed power systems, and other low-BoP use cases

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Description Vendor

Product Overview

  • The G-5 Hydrogen Fuel Cell is a compact, lightweight, and high-performance solution engineered for low-pressure, low–balance-of-plant (BoP) applications. It is ideally suited for platforms where power density, efficiency, and system simplicity are critical—such as unmanned aerial vehicles (UAVs), portable power units, and distributed energy systems.
  • Delivering a rated power output of 6.2 kW at 0.65 V per cell, the G-5 achieves exceptional volumetric (3.4 kW·L⁻¹) and gravimetric (2.4 kW·kg⁻¹) power densities. Its optimized silicon bipolar plate architecture enables ultra-light, ultra-compact system integration without compromising performance, reliability, or thermal stability.

Stack Specifications

  • Product Model: G-5
  • Rated Power: 6.2 kW (@ 0.65V)
  • Number of Cells: 140
  • Dimensions (L × W × H): 156 × 78 × 150 mm
  • Volumetric Power Density: 3.4 kW/L – high efficiency per unit volume
  • Gravimetric Power Density: 2.4 kW/kg – excellent power-to-weight ratio

Operating Conditions

  • Temperature Range: 75°C – 85°C
  • Fuel: Hydrogen (ISO 14687-2:2012 compliant)
  • Oxidizer: Air
  • Coolant: Deionized water or 50/50 ethylene glycol mixture
  • Stoichiometry:
    • Hydrogen: 3
    • Air: 2
  • Pressure:
    • Hydrogen: 0.2 bar
    • Oxygen: 0.15 bar
  • Relative Humidity:
    • Anode: 80%
    • Cathode: 8%

Applications

  • Unmanned Aerial Vehicles (UAVs)
  • Personal Transport (e-bikes)
  • Backup Power Systems
  • Portable Power Units
  • Marine Auxiliary Power
  • Research & Development in Clean Energy

Key Features & Benefits

  • Compact & Lightweight – Integration into space and weight constrained systems without performance compromise
  • High Efficiency – Deliver superior energy conversion per unit mass and volume
  • Durable & Reliable – Liquid cooling system extends operational lifetime
  • Precision Operating Control – Tight regulation of humidity and temperature ensures consistent output and efficiency across varying operating conditions

Contact us

  • Interested? Please contact Siltrax by filling in the "Contact Vendor" section or completing an RFQ form
Siltrax Pty Limited

Leveraging 40 years of silicon experience to reshape the future of the hydrogen industry.

At Siltrax, we believe in hydrogen’s pivotal role in global decarbonization efforts. Our innovative silicon technology combines the studiness and reliability of silicon with industry leading MEAs to create an economical, high-performance solution. Siltrax was built on the vision of lowering the cost of hydrogen to make it accessible to all. Our low-cost hydrogen solutions will further decarbonization strategies and help to lead the charge towards a greener future.

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