oh hell yeah, i want a 240 hp monster too!! and of course i know i'll pay dearly for it too, but the few dozen they may sell a year to fanatics won't keep the company going..
higher voltage is not automatically more efficient, that's kind of a catch there. higher voltage, means more cells, which means, either more weight, more room taken up, BIGGER more cumbersome, OR each cell is smaller, so while you may preserve overall kw capacity, C rate is increasing, so that means a bit less efficiency. instead of the bigger cells being able to handle 400 amps, the medium cells can only push 350 amps before getting too hot, so you have that tradeoff. The voltage still has to be converted from mains to battery too, and the more you have to 'change' it, the bigger the losses. if you really start pushing things, now insulation starts changing class too, having to protect things harder, it's harder to shield / control, arcing between terminals, dielectric strengths between parts becomes much more significant now... there is no free lunch.
Aaron
More cells in series, less in parallel so C rates is the same in both
300V 60Ah - to get 1C you need 60amps
600V 30Ah - to get 1C you need 30amps
so you can have thinner wires, for higher voltage you need better insulation, and inverters/controller/motor will cost more bcoz of voltage range
in our bikes battery range is about 250 to 330V
with 600V system it will be 500-660V - much more range to operate = more expensive parts