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Tesla Roadster Electric Car

Hits: 9712 | Rating: (3.0) | Category: Technology | Added by: cliks
Page: 1 2 Next >   Jump to: Bottom    Last Post
Male, 40-49, Europe
 12390 Posts
Thursday, March 13, 2008 7:42:04 PM
Having checked responses from Tesla staff to questions on their website, I see that the correct figure is 53KWh, not 58KWh. Which means that the Tesla at full power will completely drain its batteries from maximum charge of brand new batteries in 16 minutes 18 seconds.

Also, the charge time isn't necessarily 3.5 hours with the special charger - it can be up to 5 hours, depending on how warm it is in your garage. The charging generates heat. Cooling will come on if there is too much heat, but of course that takes power from the batteries and thus increase charging time.

Male, 40-49, Europe
 12390 Posts
Thursday, March 13, 2008 7:26:35 PM
Here's something to think about:

Storage capacity of the batteries - variously claimed as 53KWh and 58KWh.

Peak power output of engine - 185KW (although Tesla Motor's website also claims over 200KW on the power graph).

Engine efficiency - claimed 95%.

So the engine is drawing 195KW at peak power output, if it is 95% efficient.

If the batteries store 58KWh when fully charged and brand new (the mazimum charge will slowly reduce as the batteries are discharged and recharged repeatly), then...

...at maximum power, the Tesla will completely drain its batteries from maximum charge in 17 minutes and 51 seconds.

Male, 13-17, Southern US
 175 Posts
Thursday, March 13, 2008 7:06:12 PM
I remember seeing this as a concept a few years back, but I never really expected them to put it into production.

Go figure.

Male, 40-49, Europe
 12390 Posts
Thursday, March 13, 2008 4:48:12 PM
I'd like to see a "well to wheel" efficiency comparison between an efficient diesel-powered (diesel car engines are 30% efficient in practice, with a 56% theoretical maximum) two-seater car carrying one person and no luggage/shopping/etc and a Tesla in various areas.

I doubt if the difference would be much. The main gain is emissions in areas where there's a lot of electricty generated from solar/hydro/geothermal/etc.

The compressed air engine is also interesting, though not yet practical. No batteries - electricity drives a compressor which "charges" air bottles (like scuba diving kit). That makes it possible to "refuel" in minutes at a station - you'd just swap your empty bottles for full ones or even, possibly, refill using a compressed air line. That would make "refueling" the car as convenient as refuelling a petrol or diesel car and vastly better than recharging a battery car.

Male, 40-49, Europe
 12390 Posts
Thursday, March 13, 2008 4:35:26 PM
Safety is an issue too, by the way. They're extremely light, which lowers their crash rating even with the materials used. As for the statement that the 7000-odd batteries are protected like nuclear material is in transit, that's a bit silly. Weight rules that out.

Male, 40-49, Europe
 12390 Posts
Thursday, March 13, 2008 4:23:53 PM
Yonyjet: Can you explain how batteries with a total charge of 58KWh can be charged from a USA domestic wall socket in 6 hours? They're 110V 15A, right? I make that a theoretical maximum charging of 1.65KWh per hour, and that's assuming 100% efficiency (which will not be achieved). Which means over 35 hours even at 100% efficiency. You'd need to be pulling something like 90A from a domestic plug socket to do it in 6 hours, and that's not going to happen.

I think the marketing model is right - start with a low-volume high-margin car which looks good and which has far higher performance than most people would epxect from an electric car (which still makes most people think "milk float" or "Sinclair C5"). That would, in theory at any rate, draw far more attention to the electric car market and make a high-volume mainstream car economically viable. Maybe.

However, it's too expensive and using that performance guts the range.

Male, 13-17, Midwest US
 275 Posts
Thursday, March 13, 2008 3:19:59 PM
available now... only $150,000

Male, 18-29, Western US
 3430 Posts
Wednesday, March 12, 2008 10:29:30 PM
and they will make and affordarble one

the sedan will cos about halff that

and the accord type{meaning cheap} will come out in about 4 years

Male, 18-29, Western US
 3430 Posts
Wednesday, March 12, 2008 10:25:31 PM
actually it only takes 6 hours from a 120 v wall socket

and theres a converter for 240v to charge it in 3 hours

its electric not hydrogen just electricity yeah the one being used by ur computer right noe

Male, 13-17, Western US
 808 Posts
Wednesday, March 12, 2008 8:59:14 PM
looks like a ferrari from the front and almost the sides.

Male, 18-29, Eastern US
 445 Posts
Wednesday, March 12, 2008 6:32:04 PM
then.. the car will PAY FOR ITSELF, when compared to either a normal car, or the $40,000 car it was based on. That is if you are willing to drive 270,000 fuel (electricity) efficient miles.

Things get better when the new Lithium Silicon batteries are considered. Driving those 270,000 miles will take about 15 years, and claimed within 4 years Lithium Silicon batteries should increase the range of the car 10 fold meaning it will be more practical than any other car currently made.

Male, 18-29, Eastern US
 445 Posts
Wednesday, March 12, 2008 6:26:26 PM
chrismeraz chrismeraz is 100% right.

Only LEAD ACID batteries used in hybrid cars cause pollution when speaking in the scope of car batteries and even then it is only the kind of pollution that damages one very small area. Specifically some place in Canada.

Lithium Ion batteries have virtually no environmental impact when produced and properly disposed of (they are extremely flammable and dangerous if disposed improperly).

Furthermore the Testela uses Gen 1 Lithium Ion technology, newer technology spearheaded by Subaru would increase lithium ion capacity 100% to 300% with no weight increase.

The batteries are protected in similar methods that are used to shield nuclear weapons from terrorist attacks when being transported on trailers. They will never explode in an accident.

If we assume that the newer lithium vanadium technology is used, which increases the operational life cycle of the car to say 270,000 miles by increasing the distance it can travel on one charge, then

Male, 40-49, Europe
 12390 Posts
Wednesday, March 12, 2008 5:39:43 PM
It isn't ugly because it's designed and built by a specialist company with a lot of experience in roadsters - Lotus.

A generator capable of doing the job would be too heavy. The car only works at all well because it's all minimum weight apart from the batteries. Weight kills performance.

SpacemnSpiff...cost to charge the ~7000 batteries...

The figures I can find cite 58 KWh for a full charge. I think 95% efficiency is possible on the special charger, so you'd need about 61 KWh to charge the battery packs to full. How much do you pay per KWh?

That implies an hefty charging time on USA mains. I make it about 30 hours.

I think it would be possible to make a greener diesel car. Although it wouldn't do 0-60 in 4s, that's for sure.

Male, 18-29, Europe
 2179 Posts
Wednesday, March 12, 2008 5:06:24 PM
Not as good a car as a REAL Lotus. And not for sale yet despite being in the public eye for about a year now. And it was in PGR4.

Male, 18-29, Western US
 2918 Posts
Wednesday, March 12, 2008 4:47:14 PM
now only if they made an affordable one, we wouldnt hav to go to war for oil; its 98 grand for the base, nothing included :| probably a killer for insurance to

Male, 18-29, Western US
 2479 Posts
Wednesday, March 12, 2008 3:44:35 PM

Male, 13-17, Western US
 2349 Posts
Wednesday, March 12, 2008 3:36:56 PM
As long as it doesn't look like the cars that the dumb drating Japanese make, it's cool. Look at these retarded ass cars.

Male, 18-29, Midwest US
 101 Posts
Wednesday, March 12, 2008 1:33:53 PM
I wonder what this would do to someone's electric bill. Are we talking an extra $50 a month or $500 a month? What happens to the battery if its damaged in an accident? How does it handle bad weather? Good idea but I think it would only work in certain parts of the US/world.

Male, 30-39, Eastern US
 359 Posts
Wednesday, March 12, 2008 12:35:48 PM
POSER MOBILE! This model appeals to old, fat, bald guys with small packages. I won't be impressed until they make a TRUCK that can still be MEAN.

Male, 18-29, Eastern US
 1122 Posts
Wednesday, March 12, 2008 12:24:11 PM
I'll wait until the hydrogen lotus comes out. It'll be at least as efficient if not more.

One thing being that if you go on a trip, you don't have to stop for a few hours every 200 miles stop at a hydrogen station. (which are working their way through CA for testing and hopefully across the US soon)

Male, 13-17, Western US
 691 Posts
Wednesday, March 12, 2008 11:30:07 AM
its not even ugly like all the other electric cars..... i mean seriously what be upith here...

tesla pownage

Male, 50-59, Midwest US
 443 Posts
Wednesday, March 12, 2008 10:21:52 AM
so, when it breaks down, do you go to a mechanic or an electrician?

Male, 18-29, Eastern US
 428 Posts
Wednesday, March 12, 2008 10:07:39 AM
base not bare

Male, 18-29, Eastern US
 428 Posts
Wednesday, March 12, 2008 10:07:10 AM
98,000 dollar bare price...8000 more bucks if ur a non california resident... fawk that!!! affordability just went out the window

Male, 18-29, Western US
 3481 Posts
Wednesday, March 12, 2008 9:44:51 AM
"Disclaimer: Quantities stated above are representative, not absolute. I have no affiliation with Tesla."

Oh horsecrap. I know IAB puts up stuff by people who pay him money; I betcha you're a Tesla representative. xP

Seriously though, I'm waiting for them to make an electric (or hydrogen, or whatever) that can go cross-country. I suppose it's good for city travel, but I'm all long distance.

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