The 21Revolution is the solar car which participated in the World Solar Challenge of 2009 for Solar Team Twente. Solar Team Twente was the first Dutch team that qualified for the race. On the third day 21Revolution crashed due to a faulty rear wheel. After a night of non-stop trying to fix the car, the team managed to get the car going. In the end they managed to finish eighth. During the design of the car, the focus was put on producing as much energy as possible. To achieve this, two systems used in 2007, were used and further improved: the Fresnel system and the tiltable wing.
- Year: 2009
- Dimensions: 5.000 x 1.800 x 1.300 mm (L x W x H)
- Mass: ± 240 kg (excluding driver)
- Wheels: 3 (1 in the front, 2 in the back)
- Solar Panel: 6m2 gallium arsenide Triple Junction, with a ±31% efficiency
- Battery: N/A
- Top Speed: 123 km/h