Tesla – Introducing V3 Supercharging • Hacker News Board

Re: Tesla – Introducing V3 Supercharging

#91

Post by DannyBee » Thu, Mar 07, 2019, 6:33 AM UTC

TheSpiceIsLife wrote: post #87

DannyBee wrote: post #75

Earlier quoted context omitted.

No, you can't buy that service. Not even close. 400amp service is usually 2 200 amp panels. Done with 2/0 cable. It's rarely, if ever, 1 400 amp panel. 1. There is no way you would get "1000amp service" at 250v. It would be a minimum of 480v 3 phase (and not 1000amp). You may even want a lot higher, because as you'll see, getting that many amps is ... very very hard. 2. You can't even buy 1000amp cable gauge anywhere…

A new 1MW power cabinet with a similar design to our utility-scale products supports peak rates of up to 250kW per car. Somebody is buying this service. It's probably delivered more in line with your reasoning here.

Sure, but they are probably buying >1 KV service, which is not, as the comment I responded to claims, a thing any of us would/could buy similar to "house service".

Re: Tesla – Introducing V3 Supercharging

#92

Post by TheSpiceIsLife » Thu, Mar 07, 2019, 6:35 AM UTC

DannyBee wrote: post #91

TheSpiceIsLife wrote: post #87

Earlier quoted context omitted.

A new 1MW power cabinet with a similar design to our utility-scale products supports peak rates of up to 250kW per car. Somebody is buying this service. It's probably delivered more in line with your reasoning here.

Sure, but they are probably buying >1 KV service, which is not, as the comment I responded to claims, a thing any of us would/could buy similar to "house service".

That's a fair point. A residential customer wouldn't be able to buy anything like it.

Re: Tesla – Introducing V3 Supercharging

#93

Post by DannyBee » Thu, Mar 07, 2019, 6:37 AM UTC

dreamcompiler wrote: post #78

DannyBee wrote: post #75

Earlier quoted context omitted.

No, you can't buy that service. Not even close. 400amp service is usually 2 200 amp panels. Done with 2/0 cable. It's rarely, if ever, 1 400 amp panel. 1. There is no way you would get "1000amp service" at 250v. It would be a minimum of 480v 3 phase (and not 1000amp). You may even want a lot higher, because as you'll see, getting that many amps is ... very very hard. 2. You can't even buy 1000amp cable gauge anywhere…

Which implies that Tesla is either using a much higher voltage than 250, or they're using superconductors. And I doubt they're using superconductors.

Yes. Residential/basic commercial wiring is the limit of my knowledge here, so i don't know what sort of voltage service they are buying here.

Staring at things like http://bpu.org/electric-service-rates-commercial/

(and similar pages on other utilities)

make me believe they'd end up with some medium voltage application here (IE take it in as somewhere between 3.3kv and 45kv and do step down themselves)

Re: Tesla – Introducing V3 Supercharging

#94

Post by lgregg » Thu, Mar 07, 2019, 6:38 AM UTC

colmmacc wrote: post #17

Tesla Model S owner here. By choosing spots and times strategically I've gotten nearly 400MPH charging at the existing stations and the difference it makes to convenience is amazing. Super looking forward to 1000MPH! At that rate I can likely make it to Squamish BC, from Seattle, and back, with only one ~20 minute charge in between. That's still about 4x or 5x for the time I would spend filling an ICE car, but gettin…

I wonder if one day highways will have wireless power transfer that can meter you as you go.

Re: Tesla – Introducing V3 Supercharging

#95

Post by TheSpiceIsLife » Thu, Mar 07, 2019, 6:41 AM UTC

thevardanian wrote: post #34

chubbyrabbit wrote: post #5

Earlier quoted context omitted.

His companies delivered, not him alone. Take nothing away from the man though, he works insane hours.

But he's the one coordinating it all. Which is impressive. It's often difficult to run a single small business let alone a single large project/company. It's quite outstanding to be able to run multiple of them simultaneously.

If we could plot effort vs size of enterprise for the top few roles, I wonder how that looks?

I'm willing to bet the average small enterprise requires a lot more effort on behalf of the owners and managers than any of the C-suite roles at large enterprises.

The small business owner often has to perform many roles themselves, and probably still not be able to afford a cleaner / household help / assistant(s) / tutors / nannies.

Re: Tesla – Introducing V3 Supercharging

#96

Post by casylum » Thu, Mar 07, 2019, 6:42 AM UTC

lgregg wrote: post #94

colmmacc wrote: post #17

Tesla Model S owner here. By choosing spots and times strategically I've gotten nearly 400MPH charging at the existing stations and the difference it makes to convenience is amazing. Super looking forward to 1000MPH! At that rate I can likely make it to Squamish BC, from Seattle, and back, with only one ~20 minute charge in between. That's still about 4x or 5x for the time I would spend filling an ICE car, but gettin…

I wonder if one day highways will have wireless power transfer that can meter you as you go.

They are working on it:

https://www.youtube.com/watch?v=wNQPikt13Lk&t=3m14s

Re: Tesla – Introducing V3 Supercharging

#97

Post by beefman » Thu, Mar 07, 2019, 6:44 AM UTC

I'll not take another road trip in my Tesla after dealing with the complete lack of bathrooms between San Jose and Davis -- including at Tesla Livermore which 1. shouldn't really have been closed at that hour and 2. should leave their bathrooms open after they close and 3. there's no excuse for not providing bathrooms at every supercharger station. Oh yeah, and we only put on about a mile a minute despite the charger being 120kW-capable.

Great car for local trips. But at least one of our cars will have to be gas for the foreseeable future.

Re: Tesla – Introducing V3 Supercharging

#98

Post by [deleted] » Thu, Mar 07, 2019, 6:49 AM UTC

Carioca wrote: post #52

Carioca wrote: post #42

Earlier quoted context omitted.

Have you ever considered how much chemical energy is flowing through the gas pump when you fill up a car?

I got curious and did the math: US gas pumps do 10 gallons per minute, which give us 0.61 L/s. Density is about 0.7kg/L, energy content is about 46.7 MJ/kg. Multiplying the three we get juuust under 20MJ/s or 20MW or about 80 times more energy than this kind of electric charger

[deleted]

Re: Tesla – Introducing V3 Supercharging

#99

Post by simonjgreen » Thu, Mar 07, 2019, 6:50 AM UTC

Fantastic tech. However, why do they insist on doing it in a closed proprietary way? Teslas growth is coupled to general EV growth. They can't possibly be arrogant enough to believe they will be the sole supplier of EVs if they win can they? Charging is the number 1 thing holding back adoption right now.

Re: Tesla – Introducing V3 Supercharging

#100

Post by zhoujianfu » Thu, Mar 07, 2019, 6:54 AM UTC

Zanni wrote: post #79

colmmacc wrote: post #17

Tesla Model S owner here. By choosing spots and times strategically I've gotten nearly 400MPH charging at the existing stations and the difference it makes to convenience is amazing. Super looking forward to 1000MPH! At that rate I can likely make it to Squamish BC, from Seattle, and back, with only one ~20 minute charge in between. That's still about 4x or 5x for the time I would spend filling an ICE car, but gettin…

Yeah, this is closing the gap in a significant way. It's still not "charge on the way to work" fast, but it wouldn't be a painful delay on the way home. More important, it's an improvement . I still switch back and forth between my Model S and an ICE car--I can't remember a time when the gas station experience ever got better .

When they added credit card readers to all the pumps?