These are 2020 model.  But have never been used.   All have 0.6 hours factory run time. 120/240 single phase Perkins 4 cylinder diesel engine  25,000 watts.  Super quite. Base fuel tank says 202 gallon capacity but look bigger $13,500 each.  ( No transfer switches )
These could be used for Spray drone rig setups. If you remove base fuel tank and run a small fuel cell
94 inch long (wide for you if setting sideways on goosneck trailer )  61 inch tall and 37 inch wide 
13,500