[tgsovlerkhgsel]

Would there actually be switches switching 12 or 48V in a modern car, especially a Tesla? I'd expect the switches to only switch signal voltage/current, and power electronics (MOSFET? no idea, not an electrical engineer) switching the actual loads.

[stephen_g]

That's right, the switching concern was in older cars where they were switching the 12V straight up, so that is a reasonable point for why they never switched to higher voltages, but yes, in most modern cars (and basically all EVs) buttons and switches would mostly all just be signalling electronic units to do the actual switching.