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Market-validated 2–6 kW fuel cell platform simplifies hydrogen management and will debut at Hydrogen Technology World Expo at Hamburg in October
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SYDNEY, Sept. 23, 2026 (GLOBE NEWSWIRE) — Siltrax, a hydrogen technology company specializing in silicon-based fuel cells and PEM electrolyzers, today announced the C2 Series, a market-validated 2–6 kW air-cooled hydrogen fuel cell platform for applications where weight, space and system simplicity are critical.
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The C2 Series is commercially available, with customer integration programs and partner demonstrations already underway across the Asia-Pacific region.
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Commercial and industrial UAVs are increasingly being deployed for logistics, infrastructure inspection, agriculture and other demanding applications. As flight-duration and payload requirements increase, many operators are encountering the practical limitations of battery-electric propulsion systems.
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The C2 Series was developed to meet these needs, providing a compact, lightweight fuel cell platform for UAV propulsion, portable power and off-grid energy systems.
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“Customers are asking for longer operating times and greater payload capacity without adding unnecessary weight and complexity,” said Daniel Zafir, Director, Business Development & Global Partnerships at Siltrax. “C2 brings together our silicon bipolar-plate technology and a purpose-built air-cooled architecture to provide a practical, simplified fuel cell system platform for these demanding applications.”
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A Different Approach to Air-Cooled Fuel Cells
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The C2 Series is built around three principal design elements:
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Air-cooled operation
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Dedicated fans move ambient air through the stack’s cooling channels, removing the need for a separate liquid-cooling circuit and its associated pumps, coolant, plumbing and controls.
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Closed-cathode architecture
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Unlike conventional open-cathode air-cooled stacks, C2 separates the cooling airflow from the cathode reactant-air supply. Oxygen is channelled through the stack independently, allowing its flow, pressure and filtration to be managed separately and shielded from external air pollutants, increasing both the performance and durability of the overall system.
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Dead-end anode operation
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The dead-end anode architecture supports efficient hydrogen utilisation while eliminating the need for a continuously operating hydrogen-recirculation circuit, further reducing balance-of-plant weight and complexity.
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Together with Siltrax’s proprietary silicon bipolar plates, these elements enable a compact fuel cell platform designed to balance performance, power density and durability without the complexity of a conventional liquid-cooled system.
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