Actually.... when I worked there seven years ago, I wrote a point-by-point memo explaining why 48V was such a win (trying to move to 48V for falcon wing doors),

Actually.... when I worked there seven years ago, I wrote a point-by-point memo explaining why 48V was such a win (trying to move to 48V for falcon wing doors), even having the TI guys build for us some custom PCBs w/+12 to +48V converters that we could try for the powerful motors required. However....the decision was made to stick with +12V because, mainly, the Industry pumped out accessories (door locks, fans, you name it) that run on +12, and hence +48 would be 'custom' (read: 'expensive'). Was also true of the actuators. The moby FETs needed to switch the current existed and heatsinking wasn't too much of a problem, and so.... +12V it was. Big-ass thick wires... ok.... It seems some others inside found my memo recently -- or re-discovered what I had found -- and, finally, +48V seems to be moving into vehicles. With a +48V LiFePo battery, it should work really well. And to the original comment here: yes, your copper wiring is smaller because E x I is same but I*2*R is less because I is less for given power. Note the squared term; that is why +48V is a win. Somehow, it seems like some folks (I am by no means the first!) 'see the future' but for reasons I don't fully understand, The Future seems to take longer to get here than necessary.