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Battery Capacity

Discussion in 'Roadster: Technical' started by dhrivnak, May 29, 2011.

  1. dhrivnak

    dhrivnak Active Member

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    What is the capacity of your pack? It looks like my 2008 #255 has a capacity of about 53 kw. That is measuring from 100% to 0%.

    I charged in range mode and then had a wonderful ride through the mountains. I covered 189 miles and had a chance to test the limits of the battery. I had to switch to range mode about 20 miles out to make it home and I estimated I had about 11 miles left on the battery when I arrived at home.

    The screen said I had used 50.11kw at 263 wh/mi. If I multiply 50.12/189*200 I get 53 kwh. Am I correct that 53kw is the capacity of the battery in range mode? From that I calculate about 41 kwh in standard mode.

    I was not drving for range as I was tracking a group of fast motorcyclists. So I had plenty of hard cornering and several stretches of 75 mph cruising, but the average speed was closer to 50mph.

    I would love to go farther but lack of charging option limits us in NE Tennessee.
     
  2. dsm363

    dsm363 Roadster + Sig Model S

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  3. Eberhard

    Eberhard #421 Model S #S32

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    #3 Eberhard, May 31, 2011
    Last edited: May 31, 2011
    IMG_0120.JPG
    my best result
     
  4. dhrivnak

    dhrivnak Active Member

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    Eberhard, thank you for the reply. I know you drive A LOT. Do you often charge in range mode or standard mode? And do you know how you charged for the screen shot above? I am guessing you charged in range mode and took the pack to nearly empty.

    Thank you
     
  5. Doug_G

    Doug_G Lead Moderator

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    Impressive!

    I assume you weren't on the Autobahn (average speed 65.5 kph).
     
  6. Eberhard

    Eberhard #421 Model S #S32

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    I did it on the autobahn from Monaco to Bellinzona Sud. around 70km countryroad (out of Monaco) and then 350km highway. I arrived with 40km ideal range left. I drove most time 80-85km on the truck lane (a little bit slower uphills). It is important to drag low but constant amps out of the batterie pack. countryroad consumption was much higher (135Wh/km).
     
  7. AndrewBissell

    AndrewBissell Member

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    Do you follow close behind trucks for slipstreaming? If so, how close?
     
  8. Eberhard

    Eberhard #421 Model S #S32

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    not really, most around 50m. Its more for a pretty steady ride without the need to slow down or push up. i adjust my cruise control for that. Even uphill i keep in line not to increase the amperage to much.
     
  9. AndrewBissell

    AndrewBissell Member

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    So are you constantly adjusting the little buttons on the cruise control stalk?
     

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