Nuon Solar Team (Netherlands)
Nuon won the 2014 Sasol Solar Challenge and the 2015 World Solar Challenge. They are the clear favourites for this year’s event.
It seems that Tokai will be back in South Africa this year, to challenge Nuon for first place.
North-West University (South Africa)
NWU came 11th in the the 2015 World Solar Challenge, ahead of South African rivals UKZN. They should do well on home turf this year.
Lodz Solar Team (Poland)
The team from Lodz will, I understand, be taking their lovely Eagle One cruiser to South Africa this year.
This seems to be a new team, who are building an old-school symmetrical 4-wheel car.
Anadolu Solar Team (Turkey)
Anadolu were in the top 20 at WSC15. If I understand their (Tukish) web page correctly, they are off to South Africa as well.
Not competing this year are UKZN.
Update: Google is reporting the Sasol Solar Challenge website as potentially hacked (and a quick glance at the page HTML makes it clear why), so exercise more than usual caution. Trend Micro, scanurl.net, and urlvoid.com report no major concerns, but the website is of limited value anyway, being mostly about the 2014 race.