You understand that the device you linked will blow up if exposed to over 100V right? You're insanely oversimplifying what it would take to convert 10kV down to

You understand that the device you linked will blow up if exposed to over 100V right? You're insanely oversimplifying what it would take to convert 10kV down to a usable voltage for use in EVs. Anything that can convert 2MW will be the size of a fridge, at minimum. If you could save a bunch of copper cabling by running everything at 10kV, people would be doing it. 800V is already pushing the limits of what most folks can do with technology we have today. As a reminder, 10kV can arc close to 2 inches in free air (depending on humidity, of course), which means you need to insulate the hell out of it anywhere it's exposed. That means motors are pretty complicated to use at 10kV. By comparison, 800V only arcs 0.1mm (0.004 inches) max.