Comments on: Model S and More Models Promise to Recharge Tesla

By: gjhksfdf

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By: sculptor

sculptor — Sat, 08 Oct 2011 18:22:45 +0000

Looks reasonable… However, I noticed that only Tesla techs were driving. This is totally understandable since those a beta cars. But, what I fear is that people will buy them without ever really testing them and they’ll prove to be less drivable that appeared here. In particular I’ve heard that the cars will not have regenerative braking and will rely on having a set amount of regeneration as default. This means taking your foot of the gas will kick in the regeneration. Now speaking as a Volt owner I think this will result in an undrivable car. I say this because it means that taking your foot off of the gas will be the equivalent slamming on the brakes because of the high torque of the motor. Now, likely the amount of regeneration will be limited or even configurable but still since braking does not regenerate the tendency will be to set it to a high level. At the very least this will mean it’s pain in the ass to drive.

By: Max Reid

Max Reid — Thu, 06 Oct 2011 14:27:30 +0000

See the Video of Tesla Model S Beta in youtube.
It can seat 5 adults and 2 kids in the hatch area
and the bonnet can be used for keeping things.

Thats the advantage of hatch / wagon.

By: jwishart

jwishart — Wed, 05 Oct 2011 21:15:05 +0000

@Jeff A,

I stand corrected on the AC Level 2 charge time--I did not know the current levels were that high. I just learned this afternoon that my company is also going to be designing a 70+ A EVSE. I would note, however, that the vast majority of public charging stations are going to be limited to 7.2 kW at most, so the article should have at least made the distinction.

My issue with the DCFC time stands.

By: Jeff A

Jeff A — Wed, 05 Oct 2011 21:04:05 +0000

Clipper Creek makes a 75A Level 2 charger. They make the existing Tesla HPC chargers which are 70A. So there is such a product out there now. Just very rare.
Most Level 2's are limited to 30A which is tiny for a Tesla, but plenty for the run-of-the-mill EV's.

By: jwishart

jwishart — Wed, 05 Oct 2011 17:58:56 +0000

@FreeElectrons,
You might be able to argue that the electrical service of +85 kW is available in some situations–but certainly not everywhere that is going to need a DCFC unit if the Model S is going to be charged at this rate ubiquitously–but which model of DCFC is going to put out this amount of power? The CHAdeMO spec is for 50 kW, and some brands go up to 60 kW (disclaimer: I work for a company that has one), but this is certainly nowhere near the power that is mentioned in this article.

By: James Davis

James Davis — Wed, 05 Oct 2011 12:21:42 +0000

That's right "FreeElectrons"; I-5 is a power house and Toyota has had a super charger now for over a year that can charge in less than 15 minutes and Toyota and Tesla are partners, so guess what charger Tesla is going to use.

Since the feds gave GM 140 billion to bail their keesters out of bankruptcy, and we will never see that 140 billion again since GM will be outsourcing their electric car production to China, why can't the feds give Tesla $140 billion so they can keep their electric car production here in the U. S. where Americans need the jobs? Nissan's Leaf is already outselling the GM Volt by 2 to 1...shouldn't that tell the feds that people are craving electric cars and since Tesla is building electric cars, they shouldn't have any problem getting the 140 billion from the feds.

By: Mike S

Mike S — Wed, 05 Oct 2011 09:10:03 +0000

I really like this car…. It looks great! I hope I will get one someday…

Mike
http://r.evie.ws/view-review/build-your-own-electric-car

By: FreeElectrons

FreeElectrons — Wed, 05 Oct 2011 00:19:30 +0000

FTA "Tesla will also get the ball rolling on this country’s still-limited recharging infrastructure with fast DC charging in several locations along California’s I-5. "

Clearly they're speaking of charging stations next to the highway (like gasoline stations). I-5 runs along Path 15 (usually within a few miles of the roadway) and moves gigantic amounts of power up and down the west coast. I'm quite certain Path 15's two 500 kV and four 230 kV lines are more than adequate to provide a measly 85 kW to charge a Tesla S.

By: jwishart

jwishart — Tue, 04 Oct 2011 23:43:41 +0000

I have issues with the charge time reported in this article. What DC fast charger is going to be able to supply over 85 kW in order to charge the 85 kWh pack “in under an hour”? And even though the SAE has defined AC Level 2 charging as being up to 19.2 kW, no EVSE products out there currently come anywhere near. So to say that the S will charge in about 5 hours is very misleading.