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Just got my Tesla, got a couple questions

Discussion in 'Roadster' started by SuperB, May 10, 2009.

  1. SuperB

    SuperB Member

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    I just received my Tesla, arrived half charged which was nice, but a full charge would have been better! Man is this car a lot of fun.

    I have a few questions is other owners can please help.

    My big charger isn't installed yet, the electrician ran into issues, so all I have is the 15 AMP travel charger. The travel charger keeps tripping the reset button on the cord. I get an hour or two charge then it quits and I have to reset it. Anyone have similar issues or advice?

    While charging, the fans on the batteries seems to always run, is this normal?

    I didn't notice any difference between normal and performance mode?

    I am in Florida and it's already getting quite warm here. The AC in my Tesla didn't seem to do very well. Is this normal or should I call Tesla about it. Also, what experience do others have with the AC draining the battery?

    My drivers side rearview mirror is bowed or something making the image distorted. This I assume is not normal, but I figured I'd ask anyway.

    SuperB
    Orange in South Florida
     
  2. BBHighway

    BBHighway Member

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    SuperB,

    Congrats on getting your car!

    I've seen comments about the charger tripping. I know some people have even gone so far as to remove the GFI and just wire a heavy duty plug on the end.
    http://www.teslamotors.com/owners/forum/index.php?topic=388.0
    Nobody will officially recommend that in case something goes wrong You should call Tesla customer service on Monday and ask for help.

    It's normal for the battery fans to run when charging. When charging at 240VAC, the front fans will probably run too.

    I haven't rried performance mode, but as I understand, it allows the batteries and/or PEM to run at a higher temperature. Otherwise it will begin cutting back the power to prevent overheating. If you haven't run the car hard enough for long enough for it to reach that temperature then it won't make any difference. The downside to allowing overheating is less battery calendar life.

    I've seen some people say the AC doesn't work well, others say it works great. I haven't tried mine yet. I think you have to use the recirculating mode to get the full effect.

    Don't know about your mirror, you'll have to ask Tesla about that.
     
  3. graham

    graham Active Member

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    Yes, the car makes more noise charging than it does driving. My car seems to start charging with lots of fan noise, and that tapers off after a while as it gets closer to being fully charged.

    As BBHighway says, part of performance mode is pre-heating the batteries, part of it is allowing you to charge the batteries 100% and discharge them 100%. (instead of 90%-10%) I have not seen much of a difference in performance between standard and performance modes.
     
  4. TEG

    TEG TMC Moderator

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    My RangerEV does the same thing with regards to fans coming on while charging. Putting energy into the batteries is somewhat analogous to taking it out, so they likely want to cool the batteries when driving hard and when charging.
     
  5. SuperB

    SuperB Member

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    #5 SuperB, May 10, 2009
    Last edited: May 10, 2009
    Thanks guys.

    Just wish my charger was hooked up. This travel charger is about useless. :biggrin:
     
  6. Vger

    Vger Active Member

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    As a recent recipient, it would be nice if you would add or update your info on the "Ultimate Spreadsheet" for the Roadster owner community. Go to the owner's area on tesla.com and look for a discussion post on this subject to get the link to the Google doc.

    Thanks and good luck! I am still months away, so I take heart in every delivery!
     
  7. vfx

    vfx Well-Known Member

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    Can your Tesla beat your Ford GT?
     
  8. SuperB

    SuperB Member

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    I have not yet had the Tesla at full charge or in performance mode so I can't compare the Tesla the the Ford GT yet. Once I am able to get a full charge, I'll stage a race, however my GT has an upgraded pulley and an extra 100 horses, so I'll also need to find a friend with a stock GT.

    My thoughts and comparison so far:

    The GT feels faster, because it's loud and as the supercharger spins up, it is quite fast. But, I think a fully charged Tesla would beat if off the line and for the first 100 ft. After 100 ft, I think the GT would pull away.

    At around 80 MPH, the Tesla still has a lot of torque, but GT has a TON more, again mine was upgraded, but I think it had a lot more even when it was stock.

    The Tesla is a lot of fun to drive, but I'd say the GT is more fun, handles much better, is easier to drive, turns more heads AND has a place to put sunglasses and my phone.:redface:

    I had though I might sell my GT when the Tesla gets here, right not I am pretty sure I'll keep both. I really really like the Tesla so far, but the cars are so different that neither can replace the other.

    I do notice that the motor whine the Tesla makes at deceleration, though very quiet sounds just a bit like a police siren in the distance, which is frightening, but I'll get used to it. In the GT I can hear anything but the engine, so it's not an issue.:biggrin:

    Either I have not figured out the JVC in the Tesla, or it just isn't that good. The Radio in the GT is much much better and the AC in the GT works GREAT!

    Fit and finish on the Tesla is good and what I expected, but it's not quite up to par for what they need for mass production of the model S.
     
  9. SuperB

    SuperB Member

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    As for the spreadsheet, I could not find it.

    Why not do something like the fordgtforum has.
    Ford GT Registry
    I wrote that code and can do the same for the Tesla stuff if the Admin wants it.
     
  10. Kevin Harney

    Kevin Harney Active Member

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    Unless I am mistaken - and I am sure that others will correct me if I am wrong :biggrin: I do not think that the "performance " mode actually adds performance. I think it only changes the charge and discharge capabilities of the battery allowing a more complete use of the battery in terms of a percentage of energy stored. It does not allow for a greater release of that energy. In other words miles driven will be effected but speed and quickness will not be effected.
     
  11. donauker

    donauker Member

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    Performance Mode is all about maximizing performance. This quote from the Roadster charging manual.
    This is accomplished by two parameters. The battery pack is charged to a higher level (voltage value) just as it is in range mode. It is also allowed to warm up to a higher temperature level which reduces the internal resistance of the individual cells thus allowing greater current output. This higher output power will only be available during the initial use after this charge mode while the pack is still at the elevated voltage level.
     
  12. Kevin Harney

    Kevin Harney Active Member

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    OK so does that also mean that the performance mode is a one shot deal ? You get one quick acceleration and then the voltage is not longer cabable of it ? And you have to use it in an alloted time frame before the pack cools back down ? More details would be great on this ...
     
  13. donauker

    donauker Member

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    Not necessarily one shot but for peak gain you would want to go right from charge completion to time trials. The thing to remember about the Roadster is the fact that the battery coolant circulator pump runs continuously at high charge levels and given time it will consume the extra charge level. Also if the pack does cool down you will have to use a bit of the extra charge level to warm it back up to peak level.
     
  14. TEG

    TEG TMC Moderator

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    I think we really are talking about a somewhat subtle difference here though.
    The Roadster is more than adequate for nearly any 0-70mph circumstance except if you were trying to prove a point on a dragstrip.
     
  15. Kevin Harney

    Kevin Harney Active Member

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    I would be curious as to what that subtle difference amounts to but I am sure that you are correct. Maybe a tenth or a hundreth of a second.
     
  16. vfx

    vfx Well-Known Member

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    SuperB, Thanks for the GT comparison. I have a friend with one (same colors as yours) so I was curious.:smile:

    You painted a good picture of the strengths of each car side by side. What color is your Tesla? Your VIN must be >400. Did you put/remove the number on your GT? That AC must be pretty important in the south...
     
  17. SuperB

    SuperB Member

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    #17 SuperB, May 11, 2009
    Last edited: May 11, 2009
    That is what I was starting to think, but then what's the difference between performance and Range.

    I assume a fully charged battery gives out 10-15% more power than one at 25%. At least that is how my RC cars seem to run.

    As for the Travel Charger. The Tesla folks told me to be sure to not use an extention cord with the travel charger. This is of course a big problem for most of us. I did so as a test and it appears to be working much better. I did use a 50' extention cord, but it was super heavy duty. I'll try to find a 10' and 25' super heavy duty cord and see if that works.
    I also noticed that if the travel charger is in the sun, it trips a lot (at one point it would not even reset), guess it gets hot easily.
     
  18. donauker

    donauker Member

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    Performance Mode increases the top end charge level and allows the battery temperature to go higher so it can provide more power. The PEM may also be configured to pull this greater amount of power.

    Range Mode increases the top end charge level for the added battery capacity this provides. Battery temperature is not increased and also the PEM is configured to provide reduced power to the motor. Acceleration is limited.
     
  19. SuperB

    SuperB Member

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    My Tesla is #369
    The AC issue is getting to be a real problem for me. It's better with the windows down that with the AC on. It really doesn't work well enough at all, maybe mine has a problem.
     
  20. TEG

    TEG TMC Moderator

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    #20 TEG, May 15, 2009
    Last edited by a moderator: May 15, 2009
    Graham, are you sure about that pre-heat bit?
    My assumption was it just allows them to get hotter when being pushed hard, but pre-heating them doesn't sound right to me.

    The owners manual says something like:
    So, I don't think they are pre-heating, but rather just letting it get hotter if you try to push it hard.
     

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