Hello; The e trailer looks like a pretty damn good concept! Only thing is,how much does it weigh? If it eats up much of your gross weight it could be less efficient after all. Save fuel,but loose pay load. Kinda a toss up. ZF’s eTrailer is a semitrailer with integrated electric motor. The prototype can convert every conventional truck it is coupled with into a hybrid vehicle. The eTrailer recuperates free energy during brake and downhill maneuvers. The energy can be used to power trailer local auxiliaries like refrigeration units on reefer trailers. Or it can be used to assist the truck engine with additional traction lowering the fuel consumption up to 16 percent less fuel. The eTrailer is a perfect proof for this. H2Trac, the electrically-powered tractor was a project that first emerged back in 2015 and then underwent a major redesign in 2017 before the development firm, known as MTT, was voluntarily liquidated in 2020. The new company is known as H2Trac and the tractor itself as the EOX. Although the fundamental design principle of it being an electrically-driven systems tractor remains, much else has been changed. The most obvious revision is to its size and shape. The original machine was equipped with multiple mounting points, allowing implements to be carried between the wheels as well as at each end. This feature has been done away with altogether and the tractor now has a conventional three-point linkage at the front and rear of a much shorter, but still quite substantial, chassis. Other attributes that remain include four-wheel steering and variable track width which can be adjusted while in motion. The second great change is the replacement of the diesel engine ‘range extender‘ by a hydrogen fuel-cell power pack, enabling the claim that it may be run completely on green energy. As to just how green this is, will depend on the source of the hydrogen, much of that which is commercially available at present is derived from the cracking of fossil fuels.