An electric off-road vehicle has a prime mover assembly with a drive motor and a gear reduction unit connected at a connection surface which is offset from a longitudinal midplane by a PMA connection surface offset within a range of 70 to 140mm. A drive shaft extends under the power battery and at least partially within a drive shaft accommodating recess of the power battery, while seating extends at least partially over the power battery. The seating is located at least partially forward of the power battery, with from 52 to 100% of the seating extending over the power battery in plan view. A heat transfer system for the power battery uses a liquid heat transfer medium. The heat transfer system includes a pump located rearward of the power battery and forward of a rear differential.