Methods and systems for an electric drive axle of a vehicle are provided. An electric drive axle system includes, in one example, a gear train configured to rotationally attach to an electric motor-generator. The gear train includes an output shaft rotationally coupled to a first planetary gear assembly axially offset from an input shaft rotationally coupled to the electric motor-generator, the first planetary gear assembly configured to removably couple to a differential arranged co-axial with an axle.