- Upgraded version of Solar Impulse 1. This is a single-seater aircraft made of carbon-fibre.
- Wing span: 72m.
- Weight: 2300kg (half of an average car)
- Solar cells: 17000 solar cells built into the wing provide four electric motors (17.5 CV each) with renewable energy.
- During the day, the solar cells recharge lithium batteries weighing 633 Kg (2077 lbs.) which allow the aircraft to fly at night and therefore to have virtually unlimited autonomy.