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Roadster as a collector's item battery care?

Discussion in 'Roadster: Technical' started by tander, Feb 18, 2014.

  1. tander

    tander Member

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    Hi all, I was just thinking about how fun it would be to get a roadster for the summer, which got me thinking about how they are probably great collector's items considering that they are the first few thousand cars of a company that will eventually make millions. But has anyone thought about long term battery care? Obviously it seems like you might want to replace them after a while, but if you didn't, would the batteries become hazardous in 20-30 years or maybe just dead, maybe a trickle charger? I know that the batteries have held up very well so far but I have no idea what to expect from them when you look a long way out, I'm sure eventually there will be some great battery replacements/upgrades but it seems like it would be cool to retain the original battery.
     
  2. stopcrazypp

    stopcrazypp Well-Known Member

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    Three big ones: Don't store at high temperatures, high SOC, and don't let it brick (a distinct possibility if it's under storage for a long time).

    No one knows what will happen in 20-30 years, but "end of life" is usually 70-80% capacity. The degradation happens quite gradually until that point, but I think the assumption is that when you reach beyond that point, the battery have a rapid drop at some point (I have no evidence of this, as the battery testing I have seen all stop at the "end of life" mark).

    Another thing to note is that the battery degrades even if you don't use it, so it actually makes more sense to drive it rather than only being in storage. The degradation from use (cycle life) and storage (calendar life) is not additive, so you can actually use the car for x amount of cycles during the year with no difference in degradation compared to storing it unused.
     
  3. strider

    strider Active Member

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    Also the Roadster has a "Storage" mode that minimizes charging and keeps the battery at mid-SOC.
     
  4. WarpedOne

    WarpedOne Supreme Premier

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    It would be cool but little else:)
    It is actually quite fortunate that tesla used/uses 18650 cells. Even if they turn their back on roadster owners, one can go and buy run-of-the-mill 18650 LiIon cells and rebuild their own pack.
    There are already people toying with this idea.
     
  5. ibcs

    ibcs Member

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    If you buy a roadster you will drive it. Thought I'd store mine for the winter, but instead got Pirelli snow tires and drive it all the time. Snow doesn't slow down a roadster unless it's too deep. You will love it.
     
  6. thefortunes

    thefortunes Member

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    +1. Drove my normal 110 mile round-trip commute yesterday in 4"-5" of new snow (some unplowed streets included). Not a problem.

    Ice chunks from semi trucks, on the other hand, are definitely to be avoided.
     
  7. tander

    tander Member

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    Thanks everyone for your thoughts, and yes, I was definitely planning on driving it, but also figured that eventually the battery would degrade enough that it will need replacement or retirement.
     
  8. djp

    djp Roadster 2.0 VIN939

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  9. ViperDoc

    ViperDoc Roadster 1305

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    Snowy driving


    Glad to hear I am not the only one insisting that my Roadster is an all-season car in a snowy state (VT in my case). Everyone things I am crazy driving in the bad weather, but at least I don't have to work about the body rusting from the salt!

    DJ
     
  10. tander

    tander Member

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    One other thought/question I had regarding the collecting idea, is the Roadster battery a drop in/out (or rather screw on/off) sort of thing like the Model S or is it more complicated than that?
     
  11. Doug_G

    Doug_G Lead Moderator

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    Actually, more like 15% SOC. I'd prefer if it were 50% just in case of an extended power outage.
     
  12. strider

    strider Active Member

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    It is incredibly involved to R&R the Roadster battery. Lots of manual labor to get it in and out.
     
  13. dhrivnak

    dhrivnak Active Member

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    Depends on your definition of "involved". The challenge is the battery weighs 975 lbs. so you really need a lift to get it out of the Roadster and forklift to move it. But the labor is not that much to drop it is more that very few shops can handle a 975 lb battery that needs to be dropped through the bottom of the car.
     

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