Expanding your network whilst also laying off your entire Supercharger team is obviously another of Musk's masterful gambits.
this post was submitted on 31 May 2024
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Yeah, definitely not one of his finer moments...
We had the opportunity to choose a standard and nationalize the infrastructure and we fucked up yet again
NACS connector is dog shit, and still uses the CCS communication protocol. If we were going to change the whole industry, we should have changed to something that offered 3 phase power as an option. But the lemmings took what they perceived as the easy option.
They fucked around and now they're going to find out.
SAE J3400 does support 3 phase power, which is great!
No it doesn't. NACS is the two power pin, pilot, and proximity. No three phase is supported. You may want to actually buy the spec like I have before making things up like this.
I'm no electrical wiz, but it seems like we're dealing with a misunderstanding?
When I hear "3 phase support", I jump to it can be powered by at least part of a 3 phase supply without transformers. Which is what they clearly state in multiple sources:
SAE J3400, with the support of a supermajority of OEMs, has made sound engineering decisions that will pay dividends for decades by lowering barriers to electrification in North America. ... It supports AC voltages commonly available in commercial areas, streets, parking garages, and dense housing locations, specifically 480/277-V three-phase power, one of the most common configurations provided by utilities in the United States.
I am not sure I understanding you correctly, you wanted them to feed all 3 phases to charging EVs? Batteries are DC, wouldn't that mean sticking a heavy 3-phase to DC converter in the car?
So you don't understand what 3 phase means, which is totally okay. Just say that instead of making up an incorrect answer. Saying "powered by at least a part" isn't three phase, that would be single, two, maybe split-phase like normal North American domestic power.
Which is what they clearly state in multiple sources
The other issue you have here is that J1772 is rated for 300v, just like J3400 is rated for 300v. It's a software choice, and an EV plus connector that support increasing voltage don't need a new connector. In fact, adding 277v support to J3400 will require J1772 support anyway. J3400 is simply J1772 with a new form factor proposed- same as it has always been. But it combines the DC pins from Combo 1 into the existing J1772 / J3400 pins.
I am not sure I understanding you correctly, you wanted them to feed all 3 phases to charging EVs?
Yes.
Batteries are DC
What does this have to do with anything? You're already converting split phase AC into DC, using 3 phase (already done in this place called Europe, BTW) delivers more power at the same amperage.
sticking a heavy 3-phase to DC converter in the car?
Yes. Again, see all of Europe.
What is the actual issue you're trying to solve here in the US? We simply don't have the prevalence of lower power 3 phase systems like Europe does. Are you worried about unequal legs for commercial operations with tons of L2 chargers? Can you be more specific about why adding 3 phase inverters to all the cars in the US would be a benefit when we already have access to single phase everywhere, or 3 phase L3 chargers that can just feed us DC (anywhere from low to high power)? I'm just not seeing it.
I'm not trying to solve for anything except a unified connector. The upshot of which would be supporting all three phases of a three phase branch which is something that NACS mentions while only using two of the phases from a 480v system. Using all three means onboard chargers and connectors could be the same globally, and when using split phase power in north america, the onboard charger would still work completely fine but at a lower voltage.
When you layoff the entire super charger team, this is a likely outcome. Possibly intentful?
I would not be so quick to attribute malice to that which can adequately be explained by stupidity...