The ground station converts tensile forces from the sheets to the electric power fed out online. A conventional electric winch used on fish trawlers and cranes will usually work the same way. The solution is also relatively similar components of a nacelle in a traditional wind turbine but where the hub is replaced with a reel for the line. Some elements stand out in this winch. The main thing is that it must be able to operate at high speed to withdraw the kite.