According to Eon, the decision means a phase-out of helicopters.

"Our tests show that drones are a powerful tool for increasing delivery reliability and reducing the number of power outages. In addition, we get major environmental and safety benefits," says Martin Höhler, CEO of Eon Energy Distribution.

The drones are a better alternative for the environment, as they do not produce carbon dioxide. They also do not make as much noise – which has been a problem during helicopter inspection, when domestic animals have been frightened.

Every year, Eon inspects 24, 000 kilometers of overhead line.

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See in the clip how it is done to inspect the power grid with self-steering drones. Photo: Tomas Blideman/SVT