Question-2025 Prius in EV Mode: Reply quickly!

Discussion in 'Gen 5 Prius Technical Discussion' started by iRun26.2, Jun 13, 2025.

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  1. Quovadis007

    Quovadis007 New Member

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    The Prius phev 2023, switches on the ice, in Ev mode, when you ask for more than 75% of the power.
    You can easily see this on the energy meter. There are 4 energy consumption blocks, 25% eco, +25% eco, then 25% power, this always goes electrically, but if you start the last block of 25%, the Ice always starts.

    Once the Ice starts spinning, it will continue to do so for at least 5 minutes.
     
    #141 Quovadis007, Jul 5, 2025 at 1:25 PM
  2. iRun26.2

    iRun26.2 Active Member

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    IMG_6639.png
    I attached a close-up picture of my ‘charge-evo-power’ meter (on the upper portion of the picture). Notice how both the ‘eco’ and the ‘power’ sections have a half way through position with a notch. I’m guessing that if you get past the 1/2 point in the power section, that is when the engine will turn on.

    Later today, I am going to try it out on my 2025 model. I should note, my car is in EV mode.
     
    #142 iRun26.2, Jul 5, 2025 at 1:30 PM
    Last edited: Jul 5, 2025 at 2:10 PM
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  3. Gokhan

    Gokhan Senior Member

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    You got too excited and accidentally hit the HV or EV-Auto button? I have done that. ;)

    It could also be a high-battery-temperature issue as the manual says.
     
    #143 Gokhan, Jul 5, 2025 at 4:41 PM
  4. Gokhan

    Gokhan Senior Member

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    I am not familiar with the Gen 5 display (darn, it is small and cramped!), but no, that cannot be. As discussed here, in the BEV mode (not in the BEV/HEV auto mode), the engine would not kick in no matter how much you press the accelerator as long as you are under 84 mph, except perhaps in unusual circumstances such as an overheated or too cold traction battery.
     
    #144 Gokhan, Jul 5, 2025 at 4:46 PM
  5. Gokhan

    Gokhan Senior Member

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    I do like how all the info was put together in that small display though.

    The Arene software platform (available in the Gen 6 RAV4 and probably also the Gen 6 Prius) will revolutionize these displays, as they will become highly customizable.
     
    #145 Gokhan, Jul 5, 2025 at 5:00 PM
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  6. iRun26.2

    iRun26.2 Active Member

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    I took a road trip tonight and drove 51.8 miles (50% highway) on pure electricity (one charge). I tried but was unable to force the gas engine on by really pushing hard on the accelerator (in EV mode). The maximum EV acceleration was amazing! Much stronger than anything I’ve experienced in a Prius before (and the gas engine was completely off). That’s really not what I was expecting. The gas engine must have turned on last night because I was accelerating so much AND it was hot (it is much cooler today in Minnesota).

    And, hey, I love my display! I thought it would make me not want to buy the car before I saw it in person (it was criticized by a few reviewers) but, as it tuned out, I like it quite a bit. I like the smaller one shown in my picture because the other half of the display (not shown in my picture) simultaneously shows my cumulative electricity efficiency in miles/kw-hr. (Something I’m always trying to maximize)
     
    #146 iRun26.2, Jul 5, 2025 at 9:59 PM
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  7. KMO

    KMO Senior Member

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    The maximum power you can ask for in EV mode is 75%. Try it.

    Power demand is limited to 75% even if the engine is running!
    That never happens in EV mode. Full pedal travel won't enter the last block of 25%.

    Any engine start will be due to some other condition, such as the system feeling the battery can't currently supply the full 75%.
     
    #147 KMO, Jul 6, 2025 at 1:26 AM
    Last edited: Jul 6, 2025 at 1:32 AM
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  8. iRun26.2

    iRun26.2 Active Member

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    I am in complete agreement. It is what I found myself last night driving my new 2025 version. I am amazed at how strong you can push the EV motor/battery and not see the engine come on. In my 2012 model you had to be very careful when in EV mode or you’ll start up the gas engine. I much prefer my newer model: Much more available power in EV mode (it feels like a sports car to me) :)
     
    #148 iRun26.2, Jul 6, 2025 at 3:08 AM
  9. Gokhan

    Gokhan Senior Member

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    Well, Gen 3 PHEV didn't really have a decent BEV mode. Gen 4 PHEV and Gen 5 PHEV are very similar.

    The other poster who claims the engine kicks in at high throttle is confusing the EV mode with the EV-Auto mode.

    All that said, in the owner's manual, Toyota doesn't recommend using the EV mode on the highway. They recommend the HEV mode for highway, which is usually cheaper at high speeds and prolongs the traction-battery lifespan, and the EV mode for city, which is cheaper at low speeds and not hard on the traction battery.
     
    #149 Gokhan, Jul 6, 2025 at 6:54 AM
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