A statement from the company said the multi-rotor drone was designed to be used in industrial maintenance inspections.
HES, which claims to have produced the lightest and most compact fuel cell systems, said it had merged its core technologies with a special multi-rotor design to extend flight durations.
The HYCOPTER Was designed in Austin, Texas, where HES is setting up a local production base.
A recharge of the drone takes a few minutes and uses bottled industrial-grade hydrogen from local suppliers.
The company said versions of the drone would next appear in transitional wing vertical take-off and landing applications.
The same core technology would also be scaled up to power manned electric aviation in collaboration with other aerospace firms.
In response to queries, an HES Energy Systems spokesman told iTWire that the drones were being initially sold at a promotional price of US$39,000 each and would be ready for delivery in four months.