Last updated: September 2026
Guide
For airframe builders: what an air-cooled PEM stack demands from your design — mass budget, airflow, hydrogen storage and control integration.
Why air-cooled PEM
No liquid cooling loop — the stack breathes air and rejects heat through fans, saving mass and complexity. beneuav grades: 1.8 kW (3.4 kg), 3 kW (8.1 kg), 6 kW (11.9 kg), all ≥50% efficiency (manufacturer specification).
Mass & volume budget
Reserve for stack + fan, pressure regulator, cylinder(s) and mounting. The 6 kW module is 250×420×160 mm at 11.9 kg — compare against your battery pack it replaces.
Airflow
The stack needs clean intake and exhaust paths; ducting design affects output — integration guidance is part of our package.
Hydrogen storage
Standard composite cylinders; run-time scales with cylinder volume. Regulator and leak-check procedures are documented.
Electrical integration
Stack output conditions through a controller to your bus; buffer sizing for peak motor currents is an engineering deliverable we support.
FAQ
Can I replace my battery pack with a fuel cell?
Yes — that is the standard integration; the stack replaces stored energy with cylinder-supplied hydrogen, trading mass for endurance.
What purity hydrogen?
99.9% (manufacturer specification) — standard industrial grade.