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12V low power system in a Prius

Discussion in 'Gen 3 Prius Technical Discussion' started by patcoghm, Jan 24, 2022.

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  1. patcoghm

    patcoghm Junior Member

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    Watch this Weber State College Video that explains the 12v auxillary battery and how to charging it.


     
    #1 patcoghm, Jan 24, 2022
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  2. patcoghm

    patcoghm Junior Member

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    This is the current model they used for charging the 12v AGM battery found in the Prius.

    Snap-on Store
     
    #2 patcoghm, Jan 24, 2022
  3. alanclarkeau

    alanclarkeau Senior Member

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    No - it's a Gen 3 - the Gen 4 doesn't use an AGM 12 volt. You can see at the start of the video it's a Gen 3 - and he says it's an old 2010.

    There might be some general similarities - but the Gen 4 is a very different vehicle.

    Hopefully the Moderators move the thread to Gen 3.
     
    #3 alanclarkeau, Jan 24, 2022
  4. patcoghm

    patcoghm Junior Member

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    Then check this on how to start the Prius with a Dead Battery.

     
    #4 patcoghm, Jan 24, 2022
  5. alanclarkeau

    alanclarkeau Senior Member

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    Again - beware - this isn't a Gen 4.
     
    #5 alanclarkeau, Jan 24, 2022
  6. patcoghm

    patcoghm Junior Member

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    Your right this post was about a 2020 prius prime and its constant dead batteries. Sorry and I would move it if I knew how. Yes it was a Gen 3 the video and maybe i'm wrong but the Prius prime charges the 12v the same way, when in Ready, thru the DC - DC converter. If its differnt im unaware of that. But its a great explanation on the 12v system.
     
    #6 patcoghm, Jan 24, 2022
  7. alanclarkeau

    alanclarkeau Senior Member

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    #7 alanclarkeau, Jan 24, 2022
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  8. jerrymildred

    jerrymildred Senior Member

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    It's just as well that the video shows a Gen 3 since this is in a Gen 3 forum.

    This is the Prius Prime charging system, which is the same as the regular Gen 4.


    Pretty much all hybrids charge their 12V batteries in a similar fashion but there may be slight detail differences.

    I don't get this talk about Prius Primes and frequent dead batteries. I've never had one in my 2017 and it's still the original.

    Edit to add: LOL! @alanclarkeau, I just followed your link after posing this. Guess I could have saved myself some time if I'd done that first. :rolleyes::D
     
    #8 jerrymildred, Jan 26, 2022
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  9. alanclarkeau

    alanclarkeau Senior Member

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    It was originally put on Gen 4 FORUM - but I requested that it all move to Gen 3 seeing that's where it belonged.
     
    #9 alanclarkeau, Jan 26, 2022
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