 Trev was first displayed at the 2005 World Solar Challenge as the concept of a low-mass, efficient commuter car.With 3 wheels and a mass of about 300 kg, the prototype car had maximum speed of 120 km/h and acceleration of 0–100 km/h in about 10 seconds.The running cost of Trev is projected to be less than 1/10 of the running cost of a small petrol car.