The GIF on the two phases of the yo-yo system is well done and gives useful insight.
Phase 1: Reel Out - Energy Production
Energy is generated during the first phase when the kite is flown in a cross-wind figure of eight pattern to achieve a high pulling force and reel out the tether from the winch in the ground station. During reel-out the Kitepower Falcon produces 130kW throughout 80% of the cycle’s time.
Phase 2: Reel In - Energy Consumption
When the max tether length is reached, the kite’s profile is adjusted in order to reel-in the tether with low force, using a small fraction of the energy produced in the previous phase. During reel-in the Kitepower Falcon consumes 20kW throughout 20% of the cycle’s time.
@rschmehl gave an information of the new website on: