AVL List Gmbh developed highly efficient mobile fuel cell power generator 

In its current configuration, the AVL fuel cell power generator is operated with commercially available diesel fuel, which is worldwide unique, and achieves an efficiency of 35 to 40%.

Compared to conventional generators, it only has half the fuel consumption, reduces pollutant emissions by 99%, and achieves a noise level of below 55 dB instead of commonly 80 to 90 dB. It is fully compatible with future alternative fuels and is used in the on-board power supply for heavy commercial vehicles or in the power generation for small boats, etc.

Source: AVL List