Parking brake question

Discussion in 'Gen 5 Prius Technical Discussion' started by HamiltonPrius, Nov 29, 2025 at 11:03 AM.

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  1. Gokhan

    Gokhan Senior Member

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    Location:
    Paramount CA
    Vehicle:
    2021 Prius Prime
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    Limited
    Well, with the Gen 4/Gen 5 Prius/Prius Prime HEV/PHEV, the problem is not the size of the size of the battery but the fact that the 12-V BMS does not fully charge the 12-V battery. It likes to keep it around a 75% SOC, but since it is buggy, this could drift down much lower.

    Regarding CCA, this was discussed before. The CCA on the OEM battery is reported according to the EN standard. The equivalent of an EN CCA of 285 A in the older CCA standard is about 470 A.

    2024 PP XSE 12v aux battery warranty replacement by toyota dealership | PriusChat

    2024 PP XSE 12v aux battery warranty replacement by toyota dealership | PriusChat
     
    #21 Gokhan, Nov 30, 2025 at 4:48 PM
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