HV battery Oil pan pre-heating in winter

Discussion in 'Gen 3 Prius Main Forum' started by Abarnabe, Feb 16, 2025.

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  1. vvillovv

    vvillovv Senior Member

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    agreed,good experiment ! but the temp of what? and what was ambient temp and how long did it take to return from 30 to 9 C? just me being curious and hoping it doesn't kill my cat ... ;)
     
    #41 vvillovv, Mar 12, 2025 at 10:57 AM
  2. Abarnabe

    Abarnabe Member

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    it was the coolant temperature, the ambient temp was 9°, I'm not sure about how long it took to go back to 9°, but I went for a 45 minutes drive reached 87 degrees, parked the car and went for 30 minutes walk, at my return the car started directly in S4, the coolant temp was about 50° , the ambient emperature was still 9°
     
    #42 Abarnabe, Mar 12, 2025 at 2:25 PM
  3. Abarnabe

    Abarnabe Member

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    yes, the original toyota heater should go into 120 vac, but I installed a generic heater rated 240v 350w, it absorbs about 1.6 amp an hour, as per Max 2, the usable battery power is 2.6 amp out of the 6.5, so not enough, I' ll plug it in to the wall outlet from now on, and the insulation helps to hold the heat between multiple trips on the same day, so you can start directly in S4 or S3
     
    #43 Abarnabe, Mar 12, 2025 at 2:37 PM
  4. rjparker

    rjparker Tu Humilde Sirviente

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    That is pretty much normal for us in South Texas in winter; 48f (9c) ambient, warming up to 188f (87c) after a drive of more than ten minutes and dropping to 122f (50c) after a 30 minute off time.
     
    #44 rjparker, Mar 12, 2025 at 7:29 PM
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