Tesla – Introducing V3 Supercharging • Hacker News Board

Re: Tesla – Introducing V3 Supercharging

#271

Post by mixmastamyk » Fri, Mar 08, 2019, 11:09 PM UTC

goshx wrote: post #228

oarsinsync wrote: post #196

Earlier quoted context omitted.

Does "car data" include locations? There's not many people that start from area A (~500m^2 around your home) and go to area Z (~500m^2 around your office) every weekday morning, and back again every weekday evening. And yep, this applies to anything that offers vague rudimentary location monitoring.

It does include location if you stop at a supercharger. They need to know where you were in order to charge you properly. I don't think that's one you could opt-out.

> They need to know where you were in order to charge you properly.

Not sure why that would be true. Perhaps it can help them a tiny bit, but not worth my privacy.

Re: Tesla – Introducing V3 Supercharging

#272

Post by db48x » Mon, Mar 11, 2019, 3:17 AM UTC

rypskar wrote: post #267

db48x wrote: post #262

Earlier quoted context omitted.

You'd have to make the surface area of the car a thousand times larger than it currently is. Or, if you could make your solar panels 100% efficient, it would only need to be 200 times larger. You don't want a "car" that big.

But you don't need that much every day. You need to charge the amount you use every day during the time the car is outside during the day, or only part of that. What if you can use the car every day and only have to charge it at a station once a week or month? Then there is even one less reason to use an ICE for those that can't charge at home

If you assume that your car could charge 8 whole hours a day in full sunlight, then you could get away with having your solar panels be just 25 times larger than your car. You still don't want a car that large. Solar panels on an electric car have never made sense, and we're not close enough to the sun for them to ever make sense. Maybe the Mercury colonists can use solar-powered cars. There's more sunlight there, and less gravity and air to slow the cars down, so it might actually work out.

Just charge your car at home, at night, when the electric prices are lowest. Since most people don't drive hundreds of miles every day, people with home chargers (or chargers at their work) won't have to visit a charging station unless they're going on a long trip. That's the only time it makes sense to use rapid charging; the rest of the time the charging can be much slower. If you have a charger at home, you could go years without having to visit a supercharger. A whole category of human activity could one day disappear, and people will wonder how they ever had time to visit a gas station every day of their lives.

Re: Tesla – Introducing V3 Supercharging

#273

Post by snowwindwaves » Tue, Mar 12, 2019, 6:42 AM UTC

caf wrote: post #244

snowwindwaves wrote: post #112

Earlier quoted context omitted.

A moderate distribution substation is probably more like 50 MVA. A house with a 200A service at 240 V is about 50 kW. You might see a 250 kVA padmount transformer feeding half a dozen big houses but that is not the same thing as a substation.

I have worked at an electricity utility. "Distribution substation" is the term of art for a 250KVA padmount transformer and associated HV and LV switchgear (or even just a 50KVA pole mount transformer). A 50MVA installation is what we would refer to as a Zone substation. 5KVA per residential lot is not an uncommon allocation rule. The network is simply not designed to supply every house 200A simultaneously (the same…

We must live in different climates. Electric heat is common around here and a house can easily have over 10 kW of heat. An electric range gets a 50A 240V circuit (12 kVA). An electric clothes dryer has a 30A 240V circuit (7.2 kVA). All it would take to exceed 5 kVA per house is for everyone to be cooking christmas dinner on a cold night. Maybe somebody has a shower (electric water heater turns on) and then uses the hair dryer (1.5 kW).

Granted you can probably overload a transformer a fair bit on a cold night. I'll ask next time I'm talking to someone in distribution what their allocation rule is.

I feel like I'm used to seeing a 3 x 33 kVA cans feeding only a few houses (that incidentally had natural gas heat and hot water...)

Re: Tesla – Introducing V3 Supercharging

#274

Post by DonHopkins » Tue, Mar 12, 2019, 1:59 PM UTC

db48x wrote: post #263

xxpor wrote: post #50

Earlier quoted context omitted.

People might find it slightly inconvenient when their keys get torn from their pants and watches ripped from their wrists every time they charge their car.

Tesla used electric fields, not magnetic ones, for his wireless power tests..

Last I heard, electric fields and magnetic fields were inextricably related.

https://www.realclearscience.com/articles/2014/01/29/how_tes...

>The power of the Tesla coil lies in a process called electromagnetic induction, i.e., a changing magnetic field creates an electric potential that compels current to flow. Conversely, flowing electric current generates a magnetic field. When electricity flows through a wound up coil of wire, it generates a magnetic field that fills the area around the coil in a particular pattern, shown with lines below: [...]

>Eventually so much charge has accumulated that it breaks down the electrical neutrality of the air in the middle of the spark gap. The circuit closes for a fleeting second and a huge amount of current blasts out of the capacitor and through the coils. This produces a very strong magnetic field in the primary coil.

Which leads us to ask: Fucking magnets: How do they work?

https://www.youtube.com/watch?v=_-agl0pOQfs

Re: Tesla – Introducing V3 Supercharging

#275

Post by db48x » Tue, Mar 12, 2019, 3:25 PM UTC

DonHopkins wrote: post #274

db48x wrote: post #263

Earlier quoted context omitted.

Tesla used electric fields, not magnetic ones, for his wireless power tests..

Last I heard, electric fields and magnetic fields were inextricably related. https://www.realclearscience.com/articles/2014/01/29/how_tes... >The power of the Tesla coil lies in a process called electromagnetic induction, i.e., a changing magnetic field creates an electric potential that compels current to flow. Conversely, flowing electric current generates a magnetic field. When electricity flows through a wound up…

That's true enough, but a large electric field can wirelessly power a fluorescent light bulb, without moving your key ring at all.

Re: Tesla – Introducing V3 Supercharging

#276

Post by kmlx » Tue, Mar 12, 2019, 9:29 PM UTC

mixmastamyk wrote: post #226

kmlx wrote: post #149

Earlier quoted context omitted.

for sure: - closed stores - no profit - lied about FSD - stock down 30% - long-term investors exit the tunnel is a joke. we were promised something, but as always with musk, we get something completely different. i'm giving the tunnel deal 3 to 6 months before imploding.

Small nobodies are typically negative about those pushing the envelope.

wow, what a hateful and crude reply. how is musk pushing the envelope? isn’t the whole industry getting there anyway, tesla be damned?

also, toyota.

Re: Tesla – Introducing V3 Supercharging

#277

Post by kmlx » Tue, Mar 12, 2019, 9:33 PM UTC

nickik wrote: post #182

kmlx wrote: post #149

Earlier quoted context omitted.

for sure: - closed stores - no profit - lied about FSD - stock down 30% - long-term investors exit the tunnel is a joke. we were promised something, but as always with musk, we get something completely different. i'm giving the tunnel deal 3 to 6 months before imploding.

- lowering prices for EV - human rated space craft to ISS - massively extend the lead in terms of EV charging networks But yeah we should really focus on the closes show rooms, that's really whats important ...

- prices for EVs are coming down irrespective of tesla

- tesla doesn’t build spacecraft. that’s spacex.

- the tesla ev charging network is expanding. but can i charge another ev at one of their stations?

all the things that i mentioned are signs that the company isn’t doing well.

Re: Tesla – Introducing V3 Supercharging

#278

Post by kmlx » Tue, Mar 12, 2019, 9:39 PM UTC

dmode wrote: post #229

kmlx wrote: post #149

Earlier quoted context omitted.

for sure: - closed stores - no profit - lied about FSD - stock down 30% - long-term investors exit the tunnel is a joke. we were promised something, but as always with musk, we get something completely different. i'm giving the tunnel deal 3 to 6 months before imploding.

I mean we are celebrating the next massive milestone of electrification of cars. Things like stock price and investors seems irrelevant

love it or hate it, the stock price and investor sentiment is crucial to a listed company. tsla can actually go under.

Re: Tesla – Introducing V3 Supercharging

#279

Post by tdfx » Wed, Mar 13, 2019, 9:26 PM UTC

meggar wrote: post #224

tdfx wrote: post #214

Earlier quoted context omitted.

I'm waiting for the electric self-driving RV. Who needs a house?

Interesting, so your house drops you off at work, and then picks you up later.

My hope is that your mobile bedroom/living room/office drives around and plugs into shared, communal kitchen/laundry/exercise/living room areas. You do your work during the transit portion and spend your free time enjoying the destinations and other people.