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Tesla reveals Supercharger network, Free Fill Ups

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Re: Tesla reveals Supercharger network, Free Fill Ups

#51
Come on, 30 minutes for a charge that'll get you just 180 miles? I just checked the 2012 Honda Civic specs[0], you can fill up with 13.2 gallons in 2 or 3 minutes, and that'll get you 13.2*32 mpg combined = 422 miles. There's no way this is gonna work unless the charging process is much faster or they swap batteries instead.

0: http://www.edmunds.com/honda/civic/2012/road-test-specs.html

Re: Tesla reveals Supercharger network, Free Fill Ups

#52

If these become as popular as they seem like they should, I foresee long lines at the supercharging stations. I'm sure that 1. Tesla have thought of it and 2. They will milk the positive publicity from such an occurrence, but it could still be a PITA for, eg., folks who want to get home from Vegas.

I actually expect higher adoption to drive improvements in charging technology. Of the top of my head a naive way to make batteries charge faster is that that they could make the individual cells as smallest as possible therefore reducing the amount of time that individual cells need to charge[1]. The batteries would be made up of thousands of these cells that could then be charged in parallel.

If they can make it so that each cell can get charged in only a couple of minutes then one of the major hurdles of electric cars will be gone.

[1] I'm assuming that the smaller the cell the faster that it can be charged. Anybody knows if this is true?

Re: Tesla reveals Supercharger network, Free Fill Ups

#53
post #20

Is it outrageous to think that eventually this "gas" will be free because outlets will compete to have Tesla and other electric customers stuck at their restaurant, bar, store for a half hour?

I remember talking to a friend who worked for an oil company, who told me that the shops at gas stations actually make 2-3 times more than the revenue generated from the gas. If you were an oil company which dealt exclusively with the consumer (which of course non of them are) you would in fact be a catering business which sold gas on the side.

Re: Tesla reveals Supercharger network, Free Fill Ups

#54

Earlier quoted context omitted.

>It's grid electric powered. The canopy doesn't do much. They're sizing the installations in partnership with SolarCity, one of Musk's other start-ups. They claim they'll be sized such that it will generate as much energy over the course of the year as the vehicles consume. Meanwhile, you're estimating power output from a CG rendering on a marketing page. You could argue whether or not they're lying, but they're cert…

generate as much energy over the course of the year as the vehicles consume Yeah right. At what utilization rate? A single charge is ~90KWh, and takes half an hour. Two charges back to back are 180KWh. jws guesses that each slot generates 28KWh/day. A ten slot charging station would only be able to charge three cars without going into the red. Tesla would have to build a lot of very oversized installations in a lot o…

>jws guesses that each slot generates 28KWh/day

Again, this is a guess based on a CG rendering on their website. That drawing doesn't constrain Tesla's engineering talent in any way – even without using extra land they could put up solar shade structures over adjacent parking spaces.

Re: Tesla reveals Supercharger network, Free Fill Ups

#55
post #48
post #42

Earlier quoted context omitted.

Ok, but prob with solar is it does you no good if its not connected to anything. And if they are just putting it into the grid what is the point other than PR?

Well for one, you presumably get paid to put power back into the grid. Secondly, is there not value in putting as much power into the grid as you consume anyway?

The problem is, in the case you propose, Tesla would be creating installations in urban environments. This type of "development" kills their credibility on "green" or environmentalism, etc. Is this kind of thing better than hydropower?

Re: Tesla reveals Supercharger network, Free Fill Ups

#56

Come on, 30 minutes for a charge that'll get you just 180 miles? I just checked the 2012 Honda Civic specs[0], you can fill up with 13.2 gallons in 2 or 3 minutes, and that'll get you 13.2*32 mpg combined = 422 miles. There's no way this is gonna work unless the charging process is much faster or they swap batteries instead. 0: http://www.edmunds.com/honda/civic/2012/road-test-specs.html

Are you comparing charging stats unironically and saying it's a dealbreaker if it's not just as good as the incumbent in this category? It's really not that terrible to stop for 30 minutes after 3 hours of driving. Long road trips just went from wildly impractical to almost convenient, assuming the chargers are well distributed.

You could compare the 0-60 times of the Civic and say it's unacceptable that it takes the Civic twice as long to get to 60 mph, or that it only seats a measly 5 people, uncomfortably at that, or that it only has one trunk.

Re: Tesla reveals Supercharger network, Free Fill Ups

#57
post #43

As a plugin prius owner. I find it a bit annoying that they don't just work with existing charging networks like ChargePoint to help expand the accessibility of electric car charging.

They already support ChargePoint on all their cars.

As for making Supercharger compatible with the SAE J1772, somehow I doubt Tesla wants a plug-in Prius lazily charging its battery for hours while a fast-charge compatible vehicle waits its turn.

Re: Tesla reveals Supercharger network, Free Fill Ups

#58

Come on, 30 minutes for a charge that'll get you just 180 miles? I just checked the 2012 Honda Civic specs[0], you can fill up with 13.2 gallons in 2 or 3 minutes, and that'll get you 13.2*32 mpg combined = 422 miles. There's no way this is gonna work unless the charging process is much faster or they swap batteries instead. 0: http://www.edmunds.com/honda/civic/2012/road-test-specs.html

Tesla never said it's as good as gas, just that it makes long trips possible.

Re: Tesla reveals Supercharger network, Free Fill Ups

#59

Making a "charging station" that could take the place of an existing gas station would be huge feat of engineering. When I go from the SF bay area down to LA, I get gas at kettleman city (because of the in-n-out :) and I go to the chevron station there. From google street view, it looks like that station can fuel 12 cars at a time. And when I'm there, there's often a line for a pump. A gas stop takes, say, 2 minutes.…

As far as mass market goes I think you're forgetting why we have gas stations in the first place. Gasoline is highly flammable and toxic so it needs to be stored properly and regulated closely. Because it's a special trip most people drive until empty and then stop by the gas station.

But with charging stations every grocery store could have them in the first few rows of parking. They could waive the charing fee if you spend X amount on food (I already get gas waivers from my grocery store). As this type of thing proliferated you wouldn't charge your battery when it was almost empty but rather be continually topping it off. Only on long trips would you consciously time things like stopping for lunch so they give you enough time to charge.

Re: Tesla reveals Supercharger network, Free Fill Ups

#60

Making a "charging station" that could take the place of an existing gas station would be huge feat of engineering. When I go from the SF bay area down to LA, I get gas at kettleman city (because of the in-n-out :) and I go to the chevron station there. From google street view, it looks like that station can fuel 12 cars at a time. And when I'm there, there's often a line for a pump. A gas stop takes, say, 2 minutes.…

> But 180 chargers, peak, each using 100 kilowatts would use 18 gigawatts.

Hmm, I think you mean 18MW, not 18GW... sure, it's still a huge amount of energy, but your typical data centre can easily consume 10MW or more. And 18 megawatt-hours is equivalent to... just under 500 gallons of gasoline.

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