In the Challenger Class, the Dutch team from Delft University of Technology took back the title with Nuna 7 and an average speed of 90 kmph , while defending champions Tokai University finished second after an exciting close race, which saw a 10–30 minute race distance, though they drained the battery in final stint due to bad weather and finished some 3 hours later; an opposite situation of the previous challenge in 2011. [