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Anyone Tried Solar Trickle Charging 12v Battery?

Discussion in 'Model S: Battery & Charging' started by richardw0000, May 3, 2016.

  1. richardw0000

    richardw0000 Member

    Joined:
    Aug 8, 2014
    Messages:
    15
    Location:
    Orlando, FL
    Hi everyone,
    I'm thinking that maybe it is possible to reduce the vampire load by using one of those solar panels you can get for a car to trickle charge the 12v battery. They cannot be left plugged in while a traditional car is running. I know it is fairly easy to mitigate this with a relay in a typical car, but how might this affect the Tesla 12v system? I would like to be able to extend the life of the 12v battery by reducing the cycling on it.

    Apologies if this has been discussed before. A forum search did not turn up anything.
     
  2. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

    Joined:
    Mar 8, 2012
    Messages:
    13,640
    Location:
    Texas
    I don't see there's much point to it. The 12V battery now lasts much longer than the initial ones did.
     
  3. brkaus

    brkaus Active Member

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    Austin, TX
    If they can't be plugged in when a ice is running, they also shouldn't be used on a tesla when it the dc to dc is on. That would be while running or when it kicks in to recharge the 12v while sitting.
     
  4. richardw0000

    richardw0000 Member

    Joined:
    Aug 8, 2014
    Messages:
    15
    Location:
    Orlando, FL
    I was looking for someone who has a little expertise on the electrical system of the car. I'm thinking a simple diode isolation will protect the solar panel, and a relay tied to a 12v circuit that open when the DC-DC converter comes on would protect the DC-DC converter.
     

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