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boblespam
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re: Does Tesla's Supercharger answer the road trip question for EVs?
boblespam   9/27/2012 1:17:59 PM
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For sure it makes no sense to compare gas station and electric charging stations. As Jhal said, most of the electric charging is done at home by night, but it can also be done at work as it costs almost nothing to add a standard main plug (no supercharging stuff) in front of any car in any company that have a private parking place. This way you can charge 4H in the morning, 4H in the afternoon and 8H by night which is much more than necessary. Don't forget that partial charging is no issue for today managed batteries. And "rich" companies could afford wireless charging when the technology will be viable.

Bert22306
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CEO
re: Does Tesla's Supercharger answer the road trip question for EVs?
Bert22306   9/27/2012 8:38:26 AM
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Remember that battery powered electric cars also existed at the dawn of the automobile age. And they didn't survive then, for the same reasons as they are having a tough time now.

Bert22306
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CEO
re: Does Tesla's Supercharger answer the road trip question for EVs?
Bert22306   9/27/2012 8:34:04 AM
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Obviously, the roof of the car was intended to give an idea of the area required for solar panels. As opposed to just armwaving about how these charging stations were going to be able to give you free energy.

Bert22306
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CEO
re: Does Tesla's Supercharger answer the road trip question for EVs?
Bert22306   9/27/2012 8:31:49 AM
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Infrastructure problem? We can't deliver gasoline, diesel, or bioduels to standard gasoline stations? You put a hydrocarbon fuel in a tank in the car. And then you extract the H2 on board, and feed the H2 to the fuel cells. You may need a small battery, similar to that of a mild hybrid, for short power bursts. No energy shortfall, no infrastructure change, no heavy and low specific energy battery to contend with, no problem with friving range. Look it up. It's doable, and I think it has a lot more potential than battery-powered electrics.

mcgrathdylan
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Blogger
re: Does Tesla's Supercharger answer the road trip question for EVs?
mcgrathdylan   9/27/2012 5:57:21 AM
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@jhall118- good point. Let's not forget, Tesla is promising free charging. That has to at least partially make up for the longer stop.

Jhall118
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Rookie
re: Does Tesla's Supercharger answer the road trip question for EVs?
Jhall118   9/27/2012 3:42:32 AM
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Personally, I wouldn't mind waiting 20 extra minutes to make my road trip free, but your 20 more minutes might be more valuable than mine.

Jhall118
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Rookie
re: Does Tesla's Supercharger answer the road trip question for EVs?
Jhall118   9/27/2012 3:41:03 AM
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You are thinking an electric car is like building a new gas car. 95% of my charging will be done at home in my garage. A large number of people commute less than 300 miles a day. Superchargers aren't the gas stations of electric cars, they are just for taking long trips. As electric cars become more popular, obviously more stations will be built. You could make the same argument against gasoline cars when the first stations were going up.

Jhall118
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Rookie
re: Does Tesla's Supercharger answer the road trip question for EVs?
Jhall118   9/27/2012 3:39:25 AM
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Your thought experiment is pretty meaningless... the charging station is not limited to the area of the roof on the car. However, your conclusion is probably right. If the station was being run 24/7 it wouldn't work. Good thing Tesla knows how many cars they are selling in each area and can plan accordingly.

Jhall118
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Rookie
re: Does Tesla's Supercharger answer the road trip question for EVs?
Jhall118   9/27/2012 3:32:55 AM
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According to a Tesla chief engineer after the unveiling, the damage to the battery is no different than any other form of charging. It's designed to bypass the charging hardware and do some other stuff that a biologist like me doesn't really understand. Keep in mind that the 85kwh batteries have an 8 year warranty. As for Hydrogen and other fuel cell technologies... you have an even greater infrastructure problem and/or at least with hydrogen it's even worse, because you are literally using MORE electricity to make hydrogen than it would take just to run the car with electricity to begin with.

Bert22306
User Rank
CEO
re: Does Tesla's Supercharger answer the road trip question for EVs?
Bert22306   9/26/2012 8:21:59 PM
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Heh. They might claim that, but does that claim cover the case case where the stations are operating around the clock? Think of it this way. If each car had solar panels on their roof, would that provide enough energy for driving the car? I mean, assuming more than just a tiny little experimental vehicle? Now exacerbate that problem by a 30-minute "refueling," where the energy required for each car driving 3 hours or so is crammed into 30 minutes. And by the fact that you're doing this for potentially many cars simultaneously. I'm sure one can do the numbers, to determine just how much solar panel area would be required. All I can say is, roof panels on EVs don't come close to generating enough power. So multply that car-roof area by at least 6 * the number of cars fueling at a time * a factor to account for the fact that this calculation only works for 12:00 noon on a sunny day * a factor to accoun t for the fact that the roof area isn't enough for practical cars, and that should give an idea whether you can net give the grid any power.

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