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EV Charging dropped from 33 to 27 miles

Discussion in 'Prime Main Forum (2017-2022)' started by Sid786, May 24, 2018.

  1. bisco

    bisco cookie crumbler

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    55,000. 36,000 ev. i get about 13 mies around town in nice weather.:(
     
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  2. HPrimeAdvanced

    HPrimeAdvanced Senior Member

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    That explains your fantastic range of 13 miles: in-town driving. My PIP was half freeway, half surface street. I'm sure I've learned to be a better Snail with all the years with a PIP (5) and now almost a year and a half with my Prime. Also, I no longer drive in Eco mode at all; no benefit for me with the Prime. I really notice how, during the rare times I'm driving with the ICE (Internal Combustion Engine) running, the car feels sluggish, and not much fun to drive. So I'll stay in EV/POWER mode.

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  3. bisco

    bisco cookie crumbler

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    yeah, there's almost no reason for me to go on roads over 40mph, which i really like.
     
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  4. HPrimeAdvanced

    HPrimeAdvanced Senior Member

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    You sir are a lucky dog!!
    I have managed some extended sessions on dead freeways (2 or 3 am!), at 45-55 mph, but that's very rare. The results were wonderful, extended my range to 38 miles EV or so. Now I look for "crowded but moving" freeways like the 5 Fwy North from Anaheim (during the week), where I can get similar results! Of course, A/C is not permitted!
    One thing that hasn't been mentioned here, the EV mileage that the system indicates at the beginning of a drive, may be considerably different than the actual EV range that you get after you complete your drive.
    Most of my current driving is now Surface Street, if I stay with this and drive especially carefully, I can exceed the predicted range for the EV miles. On the other hand, if I mix in some freeway driving or some hill climbing, my actual EV miles will be less than the predicted value. So even though your predicted EV has dropped to 27 miles, are you ending up with the same EV result at the end of your trip, that you used to get? This is the "real" number that your car is achieving. I'm assuming of course that you do like me, and run your Prime in the default EV mode til you run out of juice. I also always run in POWER mode because I like the car's characteristics in that mode, and have not lost any range.

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    #24 HPrimeAdvanced, May 26, 2018
    Last edited: May 26, 2018
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  5. Sid786

    Sid786 Active Member

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    I have confirmed that switching to ECO Mode during charging or running has no impact on EV range estimate. It still came out to be 27 miles.

    Today again that message came up for brief moment that do you want to use A/C power to cool the battery. It was a hot day and I was running A/C.

    Tomorrow I will do full charge again and run the car only in EV Mode to see if it gives me 33 miles or 27 miles.
     
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  6. Tideland Prius

    Tideland Prius Moderator of the North
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    My question is, do you still get 33 miles or do you only get 27? (I'm changing the subject a little bit). I know it's disconcerting to have the estimate suddenly change but did the actual number of miles change?
     
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  7. Trollbait

    Trollbait It's a D&D thing

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    The change in commute and weather could explain the change in displayed range. More A/C use and possibly using EV charge at higher speeds will reduce your range. You can try manually switching to hybrid mode when on highways in order to save the grid charge for surface streets. I wouldn't change the A/C use; cabin air is how the battery is cooled.

    The Eco and Power modes are mainly just changing the throttle peddle mapping. Still accelerating at the same rate, and going the same speeds, regardless of mode will result in no change.
    This is a good question. If you were driving just 20 miles a day, you wouldn't know if the 33 miles predicted on the display was accurate.
     
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  8. Sid786

    Sid786 Active Member

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    I have just confirmed by fully charging, which again gave me 27 miles on the Entune app. Then I drove the car in EV Mode only and it only gives me 26 miles. I was in ECO mode and was not using A/C. Out of 26 miles almost 25 miles were on freeway with an average speed of 65mph.

    This lower range from 34 to 27 miles started after I started driving from 20 miles per day to 140 miles per day.

    So something is definitely off. I have a 10k service scheduled for 1st week ofJune. What should I ask them to check?
     
  9. bisco

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    have you driven that same route in similar weather and gotten 33 miles?

    25 miles of ev at 65mph is amazing to me.
     
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  10. Sid786

    Sid786 Active Member

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    Weather was at 61, so much cooler. Route is pretty straightforward with small up and down. I have not driven on the route before, but if it is expected that you will get 33 miles on EV at 55 mph on a freeway, then for sure Toyota's engineers had their screw loose.
     
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  11. Sid786

    Sid786 Active Member

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    I am hoping that I am not the first and only one with this unique issue of significant drop in mileage.

    Even if we assume that the significant changes in driving distance may be the cause, then how long will it take to restore to normal.

    My fear is that something is degrading the battery and to me it feels like the issue similar to that of Nissan's leaf battery.
     
  12. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    You have not had a significant drop in mileage, that I can see. Your car is learning your driving style and conditions, and as it learns it, it is reporting how you actually drive.
     
    #32 JimboPalmer, May 28, 2018
    Last edited: May 28, 2018
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  13. Trollbait

    Trollbait It's a D&D thing

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    There are many variables at play. A cross wind will reduce range and efficiency. The road may not have been perfectly flat. Tarmacs and tires have differing rolling resistances. You won't regain all the additional energy needed to get up a hill and the way down.

    If it is hotter, the A/C will run more, which uses up more battery charge.
    Driving at faster speeds, which is likely with a longer commute, uses up more charge than at lower.
    Anything that increases the fuel consumption of an ICE car will do so with an EV one. This is normal, and not a sign of issues.

    The problems with Leafs took longer to appear that this.

    When was the last time you checked the tire pressures? A drop there can reduce fuel efficiency, and do so before it registers with the TPMS. By the time modern tires look low, they can be dangerously low. Tires would have to be under 30psi to look low on past cars I've had.
     
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  14. bisco

    bisco cookie crumbler

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    it is expected that prime will get 25 miles ev under the epa test. were you expecting something else?
     
  15. PCPrime

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    Wonder if this is the main reason why you have estimated lower range
     
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  16. Sid786

    Sid786 Active Member

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    I hope that driving 140 miles per day is the root cause. But I am sure, if this is the case then there must be others with the same issue. So far no one has acknowledged that they are seeing the same.
     
  17. bisco

    bisco cookie crumbler

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    it could be the cause of the lower estimate, but not the actual miles driven. but we haven't seen where you show that your actual miles are down.
     
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  18. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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  19. HPrimeAdvanced

    HPrimeAdvanced Senior Member

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    At 65mph, fairly flat freeway, no A/C, 65-75°F ambient, I barely make 25 miles on EV only. To get ridiculous 33-34 miles of range, speed must be kept as much as possible to a steady 40-50mph, on a level road, very few stops, no A/C. Nuthins free!
    The great thing is the CHOICE and reasonable POSSIBILITY of being able to reach these extremely frugal goals. You still have gasoline option, so no Range Panic, AND you CAN save gobs of Petro Dollars.
    It's just irritating as hell to me to literally BURN so many dollar bills when you drive SUVs, Trucks, and Average Gas Hogs!! Besides, the Prime is SUCH a ROMANTIC car; you can tell your lady, "See honey, I don't spend ALL my money on a car and gas; I'd much rather spend it on YOU!

    Posted via the PriusChat mobile app.
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  20. benagi

    benagi Active Member

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    My commute is 12 miles each way with 4 miles on side streets and 8 miles on the freeway. I’m averaging 65 mph on the freeway. I’m getting around 35 EV miles this time of year. So far I have just over 3000 miles on my car and have only burned 3 gal. of the original gas. Not bad, getting a 1000 miles per gal. I love my Prime.
     
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