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Lower average SOC: a warning sign?

Discussion in 'Generation 1 Prius Discussion' started by hybridtwins, Sep 27, 2009.

  1. hybridtwins

    hybridtwins Member

    Joined:
    Feb 28, 2009
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    Location:
    Van Nuys, CA
    Vehicle:
    2002 Prius
    For about the last few weeks, SOC on my 2002 seems to be lower on average than what I remember it being previously. It never reaches 100% and more often than not, after the car has been sitting for a while or in the mornings, SOC is about 50% or slightly below this.

    Is this an indicator of bad things for the HV battery? The car has just reached 70k.
     
    #1 hybridtwins, Sep 27, 2009
  2. bwilson4web

    bwilson4web BMW i3 and Model 3

    Joined:
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    Location:
    Huntsville AL
    Vehicle:
    2018 Tesla Model 3
    Model:
    Prime Plus
    There have been some discussions about how to measure the traction battery capacity but very few have taken time to do it:

    • backing up a hill - the altitude change when it runs out of 'omph' is proportional to the traction battery AHr. Best done after doing a 'forced charge' to bring the traction battery up to maximum energy level.
    • leaving car in "R" with brake on and every other electrical load - same idea as the hill climb in "R". Arts Automotive has a write-up.
    I've not been that curious, yet.

    Bob Wilson
     
    #2 bwilson4web, Sep 28, 2009
  3. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    The Classic SOC gauge should normally be at either 50% or 75%. It's a sign of trouble if you see the gauge at 0%, 25%, or 100%. The gauge doesn't have finer gradations than 25% intervals...
     
    #3 Patrick Wong, Sep 28, 2009
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