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12V Battery Charged While Car Parked?

Discussion in 'Model S' started by 1NJ85D, Feb 28, 2016.

  1. 1NJ85D

    1NJ85D Member

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    Is the 12V battery charged from the main one while the car is parked?

    I just installed a dashcam and want to make sure it will not drain the 12V battery. For the main battery, the drain on the dashcam is minuscule.

    Thanks
     
  2. Todd Burch

    Todd Burch Electron Pilot

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    Yes it's charged from the main pack while parked, and you have no worries about having the dashcam on 24/7. Tons of us have dashcams always on without issue.
     
  3. Fanatic1

    Fanatic1 Member

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    Just got my Blackvue. Love it!
     
  4. Tree95

    Tree95 Member

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    Yes, this is the source of the infamous "vampire drain." The car's electronics are always draining the 12V battery, and the contactors on the main battery click on several times per day to recharge the 12V battery.
     
  5. Spyder14

    Spyder14 Member

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    My S arrives in a week or so & I am very interested in adding the cameras but I am also somewhat "paranoid" about the 12 volt battery. If I add the cameras & the 12 volt takes a dump during the warranty period, will they cover it or claim that the cameras were the fault? Just curious...
     
  6. BertL

    BertL Active Member

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    Do a few searches. There are varying opinions in at least one other recent thread indicating there should be no concern if you have the camera connected via normal 12V sources that go on/off like the cigarette lighter does, whereas it could be more problematic as to what Tesla says if you tap in to an always-on source. Some people don't agree with that POV. I personally have no opinion on the subject, but my point is, the discussion surrounding your question has recently been held elsewhere. ;) Have fun with that new MS!
     
  7. 1NJ85D

    1NJ85D Member

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    That explains it. Thanks much. I knew that the 12V battery was charged from the main battery, I knew the main battery disconnected when you park, I did not know the main battery connected itself periodically, with the car on park, to charge the 12V one. Thanks again.
     
  8. Todd Burch

    Todd Burch Electron Pilot

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    If you're bored some day, sit by the car and wait. Eventually you'll hear some random clicking :).
     

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