Last year's event saw a true 'Energy Breakthrough,' when Girton Grammar School’s ‘Xception’ was the first team to take Line Honours in the 24 hour trial in a vehicle WITHOUT pedals. But, can they back that up? And what about the other class winners in Holy Trinity, Bendigo Senior and Overnewton? ... and the returning team Rode RAGE? Let's preview the field in this most difficult of challenges: the Energy Efficient Vehicles.