Why not develop an axel with an integrated motor? It’d be easily scaled to any vehicle with a solid rear axle. Fill the engine bay with batteries… It seems like an easy approach to get a widely applicable EV conversion kit. Offer a few widths and diameter axles… Is it bad to have the motor in an unsprung position?I see hub motors, so I think not. I guess air conditioning would be another thing.
It’s not exactly the same, but check out what Edison motors is doing. They are purchasing ready-built electric axles to replace the motor/gearbox on future incarnations so somebody is making them for commercial truck chassis.
https://www.edisonmotors.ca/