The Mack SunTruck concept was created for the 2009 edition of the Michelin Challenge Design contest, and it was selected for display among the 10 best projects at the NAIAS International Auto Show in Detroit in 2009 as a scale model.

SunTruck is a concept of a new generation transatlantic highway cruiser. During the design period the main goal of the exterior design was to create a new body which is not a "tank-look" anymore but still represents the king of the roads. It had to look friendly and safe. From the wiev of the driver it's not a difficult requirement to deal with but from the aspect of other cardrivers much more. The steeply rising wheelfenders and hood makes the whole body very dynamic like a running wildcat. The narrow air intake foreshadows the alternative power supply. It's a dual supplied electric-driven design. The primary energy source is a high capacity diesel engine which always runs at a constant RPM and it generates the electricity for the lithium-polimer cells which are placed in the platform of the truck. The constant running engine needs less cooling and maintenance because it's never overloaded. In a controlled electromagnetic field the radial-levitated wheels are directly drived without any physical friction what results in more efficient and silent running than common trucks. The secondary source is the fully suncell-covered semitrailer which also charges the cells or possibly can run all the tools like AC, navigation and multimedia system in the cockpit. The sliding doors are representing the new generation of trucks. Truck drivers are spending more time on roads than at home so SunTruck is the ultimate solution for a rollin' livingroom. When the driver is taking a break there is no need to keep running the engine for heating/cooling the cockpit or using the kitchen accessories and the TV/internet. All these things will work by the suncells and the great batteryfarm without making any noise around and inside the truck.