Researchers build hydrogen-powered drone to extend range for grid inspections
Researchers have successfully launched a hydrogen-powered drone designed to go where batteries fail.
Hydrogen fuel cells solve the two biggest flaws of battery drones: excessive weight and short flight times.
With a simple tank-swapping system and the ability to fly for several hours, these drones can effectively cover more ground than a human operator鈥檚 typical workday.
鈥淲e weren鈥檛 looking to replace battery-powered drones. They are practical for a lot of things. Our goal is to solve the tasks that today鈥檚 drones can鈥檛 handle,鈥 said Federico Zenith, a senior research scientist at SINTEF, a research organisation in Europe.
Reliable drone
Current battery technology creates a literal distance limit. Today, if a tree falls on a power line in a remote mountain pass, utility companies often have no choice but to send a human crew up in a helicopter. It is expensive and dangerous. In high winds, it can be deadly.
鈥淚f you need to find out if a tree has fallen onto a power line, you want to get out there as quickly as possible. Right now, you often have to use a helicopter,鈥 said Zenith.
Beyond extending flight time, the shift to hydrogen leverages the laws of physics to improve reliability.
Hydrogen provide a much higher energy density than heavy lithium batteries, reducing weight while remaining far more durable and lower-maintenance than complex gasoline engines.
This efficiency is enhanced by operational speed: instead of waiting hours for a battery to recharge, operators can simply swap out a fuel tank in minutes to get back in the air.
Despite these perks, the path to the skies wasn鈥檛 easy. Strict regulations make it difficult to retrofit existing drones with .
To bypass the red tape, the SINTEF team built its own craft from the ground up in its specialized drone laboratory.
This extended range enables continuous, long-distance tasks such as inspecting power lines between distant transformers 鈥 missions that currently exceed the lifespan of a standard battery.
Weatherproofing required
The project is currently the only one of its kind flying in Scandinavia. However, it faces a uniquely Norwegian problem: the weather.
Currently, the drone鈥檚 fuel cell is a fair-weather flier. It dislikes rain and struggles when temperatures dip below freezing.
For a tool meant to monitor avalanches and winter power outages, this is a significant hurdle.
鈥淭he most important tasks remaining are weatherproofing and winterproofing,鈥 Zenith explained.
鈥淪o far, this has been a fairly small, internal project to get the drone in the air. That is the most important thing. But we need to gain more experience and see how many hours we can keep the drone flying in Norwegian conditions,鈥 he
The team is now hunting for partners to help them harden the tech against the brutal chill. If they succeed, the days of risking pilot lives for a simple line inspection may finally be over.
Apart from search and rescue, these high-endurance drones could prove beneficial for large-scale environmental monitoring and disaster prevention.
Their extended range enables comprehensive mapping of vast territories, tracking snow levels to predict floods or hydroelectric output, and keeping a watchful eye on natural hazards such as landslides and avalanches.