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HPWC GETTING HOT WITH CHARGING

Discussion in 'Model X: Battery & Charging' started by Chickenlittle, Sep 1, 2018.

  1. Chickenlittle

    Chickenlittle Active Member

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    i use HPWC to charge my X and model3. Noticing hey connector getting quite hot when charging the X (used to be just warm). The model 3 (charges at lower amp) now gets warm. The connector appears clean. Anybody with similar experience?
     
  2. P85_DA

    P85_DA Supporting Member

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    What amps are u charging at ? It does get warm on max for the X of 72a if ur car is capable of ..if u has wall connector for awhile I would check the torque on the wires as well
     
  3. Chickenlittle

    Chickenlittle Active Member

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    Thanks great idea. Guess I should check both in unit and at the breaker. Yes am using at 72amos
     
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  4. harry

    harry Member

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    Heat is a symptom of resistance. Even though the nozzle may look OK, there is sometimes oxidation on one or more of the pins. I charge our S's at 80 amps, and every few months the connector starts to heat up while charging. Spraying some non-flammable contact cleaner into the pin areas cures the problem for another few months.
     
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  5. bkp_duke

    bkp_duke Active Member

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    If you are seeing heat on your cable, you are most likely hearing your fans in the car spin up to keep the pack at the optimum temp. Both of which means you are losing efficiency and energy to heat production.

    A little birdie at Tesla told me that for OPTIMUM battery longevity, keep the charging rate at 20-25A. Faster if you need it that day, but for optimum battery life, that's the "sweet spot".
     
  6. mspohr

    mspohr Active Member

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    I usually charge from my HPWC at 32 amps. Everything stays cool and there is always enough time overnight to finish charging. Much more efficient (I^2 R) and much easier on all of the equipment.
     
  7. bkp_duke

    bkp_duke Active Member

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    That's great, but I wasn't talking about charging efficiency. Per my friend at Tesla, the engineers have told him that for optimal battery LONGEVITY and minimal range degradation, 20-25A is optimal.
     
  8. mspohr

    mspohr Active Member

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    Thanks for this information... maybe I'll turn it down to 25.
     

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