designer's own words:
In hot summer, your car has to be exposed to sunshine for a long time and the first thing you do when you get inside is to turn on air-conditioner to drive hot air out. SHELF can not only shield your car from long exposure to sunshine, but also can convert solar energy to electricity to drive the air-conditioner and let you enjoy cool environment any time.
SHELF has the functions of foldable sunshine cover and rear wing and subtly folds the film of solar cell and stores it inside the rear wing; when the auto is started, SHELF can be used as rear wing to improve the stability of auto at high speed. When the auto is parked outside, it unfolds the solar cell board becoming a sunshine cover. The energy collected by the board can provide for the air-conditioner, taillight and other electronic equipments.shelf-1 shelf-2 shelf-3