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what is 'top off charge' display mean?

Discussion in 'Roadster' started by rdstr, Mar 14, 2015.

  1. rdstr

    rdstr Member

    Joined:
    Feb 17, 2015
    Messages:
    36
    Location:
    Richland,WA
    charged the roadster for the first time, and it finished. Looked at the display later and it had a choice displayed to 'top off' the battery charge... what is this and should I select it? The screen displayed 181mile range when the battery completed it's charge. thanks for any input.
     
  2. spaceballs

    spaceballs Member

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    Sep 17, 2013
    Messages:
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    Location:
    Sammamish
    it only charges to I think like 80% to save battery life, but it gives you the option to charge to 100% in case you need to drive a longer distance.
     
  3. Doug_G

    Doug_G Lead Moderator

    Joined:
    Apr 2, 2010
    Messages:
    15,853
    Location:
    Ottawa, Canada
    No, that's not it. To get 100% you have to set Range Mode.

    When you do charge to 100%, you should leave the car sitting there for an hour plugged in. When you do that the Roadster will do some pack balancing. After that process is over you will have lost a little bit of range.

    At that point you hit the Top Off button again to squeeze in the last bit of juice for 100%.

    Personally I've never found it did very much though. My car will charge for a few minutes and then stop again.
     
  4. spaceballs

    spaceballs Member

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    Location:
    Sammamish
    Ah thanks for the correction, I misunderstood what that button does then.
     
  5. augkuo

    augkuo Member

    Joined:
    Apr 24, 2011
    Messages:
    549
    Location:
    Berkeley
    Usually after you charge up (either in standard/range mode) the pack will rebalance and you'll lose some range. You can then top off to get another couple of miles or so right before
    starting your trip.
     

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