The mobility of the Kitenergy system is another key advantage, according to its team. "A mobile generator is capable to reach different locations, also over complex terrain," Gianmauro Maneia, an engineer at Kitenergy, said.
"This allows (you) to have energy in locations where there is huge need for energy but little chance to have it."
For Maneia, cost – as well as mobility – is important. "Our most recent flying test suggests that we can achieve a cost of energy of around 50 euros per megawatt hour," he said.
"This will be a relevant reduction compared to windmills - around 20 percent less in terms of cost of energy," he added.
It's not just Kitenergy that are looking to the heavens for greater energy returns from wind. Sustainable Energy spoke this year to Altaeros Energies, whose Buoyant Air Turbine (BAT) can operate at up to 600 metres high.
"Essentially what we're doing is getting rid of the tower and the foundation and replacing it with this lighter-than-air lifting platform, tether and ground station system," Ben Glass, CEO and CTO of Altaeros Energies, told CNBC.