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Solar Roof Info for 2023 Prius Prime

Discussion in 'Gen 5 Prius Main Forum' started by drash, Mar 28, 2023.

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  1. JoeBlack

    JoeBlack Member

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    I think, the usable battery is actually 9 kWh, because 1/3 of the battery !should! be reserved for hybrid mode. At least that is RAV4 PHV usage, and new Prius should operate in the same fashion.
    It seems I love to use the word "should" :-D
     
    #61 JoeBlack, Apr 9, 2023
    gggGary likes this.
  2. bisco

    bisco cookie crumbler

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    new battery technology may mean that you cannot extrapolate gen5 stats from gen4.
     
    #62 bisco, Apr 9, 2023
    drash likes this.
  3. drash

    drash Senior Member

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    Getting wide variations on net kWh of the battery. At the 14:28 mark of Kirk Kreifels Prius Prime review he has an estimate of 11.5 kWh net.


    From Car and Driver
    2023 Toyota Prius Prime: Catching Up to the Joneses

    "Toyota also addressed range concerns by growing the Prime's usable lithium-ion-battery capacity from a C/D-estimated 6.2 kWh to 10.9 kWh."

    Toyota tweaks their batteries as they mature. Pretty sure comparing an air-cooled battery like the 2017-2022 Prius Prime to the lighter (per kWh), more compact liquid cooled battery in the 2023 Prime will not yield the same buffer. With the liquid cooling, Toyota will use more of the battery, and leave the same amount as what the 2023 Prius HEV battery at is sized which is 906 Wh (per Toyota Spec sheet) when the Prime reverts to hybrid mode. I would hesitate to speculate they would lop off 2.6 kWh at the top end.
     
    #63 drash, Apr 9, 2023
    Trollbait and Tideland Prius like this.
  4. Gokhan

    Gokhan Senior Member

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    In Gen 4, 6.30 kWh is useable. I verified it many times with ChargePoint Level 2 public EVSEs.

    From the BEV range/mpge numbers, In Gen 5, about 11.5–11.7 kWh is useable. We can find the exact number using ChargePoint Level 2 public EVSEs, but it requires dozens of measurements to average.

    The EPA formula for the BEV range/mpge is as follows:

    Useable BEV battery capacity (kWh) = 33.705 × BEV range (mi) / mpge

    Gen 4: 33.705 × 25 / 133 = 6.3 kWh
    Gen 5 SE: 33.705 × 44 / 127 = 11.7 kWh (with uncertainty due to two significant figures in the BEV range)
    Gen 5 XSE/XSE Premium: 33.705 × 39 / 114 = 11.5 kWh (with uncertainty due to two significant figures in the BEV range)
     
    #64 Gokhan, Apr 9, 2023
    Last edited: Apr 9, 2023
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