The goal of the Green Life competition was to produce ecologically friendly solutions that were design-centric without looking completely unrealistic. One of the top three winners accomplished that feat by designing the "shelf."
China's Leon Zhu came up with this innovative yet simple way to simultaneously protect your car's exterior from the elements and collect solar energy. The idea is that when folded the shelf would provide energy for the car's electronic systems and air conditioning system. This idea is so practical and useful it's probably one of the few winners that will actually see their design come to fruition.
Via Design Boom