I noticed something peculiar on Tesla's website today... It says that if you charge at 24A on a 3-phase circuit, you'll get 16.5kW of power. If we do some math... 16500W/24A = 687.5V I don't know of any household circuit with such a high voltage. What's I noticed, however, is that 687.5 is approximately 3 times 230, which is the standard household voltage (in most countries). So it seems like whoever wrote this information was under the impression that 3-phase power gives you 3 times the voltage of single phase, whereas it actually gives you the square root of 3 (1.73) times the voltage. So, am I missing something, or did Tesla get their figures wrong?

I'm not really an expert but I think you might be confusing calculations with line to line voltage (which uses square root of 3) with line to neutral voltage (which uses 3 times the voltage)

It would be _400V_ 3 phase. Each phase is 400/3^0.5 = 230.94. 400 x 24 * 3^0.5 = 16.627. (= 400/3^0.5/phase * 24A * 3 phases)

Yes, it's why 3ph kicks arse. There are 3 hots. Each one pulls amps. If EVs in the USA would accept the common 3-ph at a mear 24a (30a breaker): 208vac 3ph = 3 lines x 24 amps x 120v = 8.6 kW 480vac 3ph = 3 lines x 24 amps x 277v = 20 kW This can be done on a dedicated short run of 10 awg THWN-2 with 30a breaker. Cheap setup