Siltrax has launched the C2 Series, a commercially available 2–6 kW air-cooled hydrogen fuel cell platform for UAV, portable, and off-grid power applications.

The platform uses an air-cooled architecture with dedicated fans that move ambient air through the stack’s cooling channels, eliminating a separate liquid-cooling circuit, pumps, coolant, plumbing, and controls.

Its closed-cathode design separates cooling airflow from the cathode reactant-air supply. Oxygen is channeled through the stack independently, allowing its flow, pressure, and filtration to be managed separately from external cooling air.

The C2 Series also uses dead-end anode operation, which supports hydrogen utilization without a continuously operating hydrogen-recirculation circuit. The architecture is combined with Siltrax’s proprietary silicon bipolar plates.

The series supports outputs from 2 kW to 6 kW, while a 3 kW reference architecture provides a starting point for customer evaluation and application integration. C2 modules can also operate in parallel to meet power requirements up to 24 kW.

Siltrax lists rated power of 3.6 kW, gravimetric power density of >1.5 kW/kg, and an ambient operating temperature range of −20–40°C for its C2 snapshot specifications.

The company is targeting UAV propulsion, portable power, remote power, mobile generators, autonomous systems, and other off-grid or weight-sensitive applications. Customer integration programs and partner demonstrations are underway across the Asia-Pacific region.

“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.”

Source:   Hydrogentechworld