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Prius Plug-in and Volt Pros and Cons

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by Bill Norton, May 9, 2014.

  1. Astolat

    Astolat Member

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    Just found some very interesting information at MPG Comparison: 2012 Volt vs. 2010 Prius vs. 2013 Prius Plug-in which as it name suggests is actually a Volt-lovers site, but the article is a very fair and detailed one. Apologies to those who will already know this, but I hadn't picked up on it at all.

    The argument has always been that the Volt is better for lots of journeys in the mid-mileage range, where it is still EV and the PiP is partially HV. Correspondingly when the Volt also drops to HV it is less efficient, primarily because of the extra effort to push the heavy batteries along.

    However, in doing my own comparison, I had assumed that when both were EV they were comparable. The figures here suggest that (contrary to the similar MPGe figures from the EPA, which assume a 6 mile EV range for the PiP:confused:) the PiP is about 15% cheaper on EV only; again presumably because the Volt has to push those heavy batteries around .

    As Bill keeps reminding us, electricity costs money. So it is only for journeys between 16 and 75 miles that the Volt is better than the PiP. If that is where your journeys all cluster, great, the Volt is the car for you. But I suspect a lot of people have patterns of many under-16 mile journeys for local errands, and then a fair number of much longer ones for holidays, business trips etc.
     
    retired4999 and markabele like this.
  2. usbseawolf2000

    usbseawolf2000 HSD PhD

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    It doesn't take account of the fuel production. It takes 2x more energy to generate, transmit and distribute a gallon equivalent electricity.

    That information is the final piece of the puzzle that Toyota included when they designed PiP. GM probably didn't and assumed all electricity came from renewable and always better to use it than gas.
     
  3. Bill Norton

    Bill Norton Senior Member

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    Astol,
    Good detailed article, thanks!
    Part of the differences with MPGe / Kwh-mile numbers are:
    they can be 'Battery to Wheels' OR 'Wall to Wheels'.

    True, the 800lbs heavier Volt has uses more Kwh to roll and the advanced TMS to keep the battery at the ideal temp range (hot or cold) uses more power in the 'Wall to Wheel' measurement. But what is the benefit of this TMS?

    They say the battery is ~450 lbs. The other 350 lbs must be the 5 radiators in the nose and the high strength steel to make it a 5 star safety rated car.

    It is a pig when you look at the lbs.
    But when you are behind the wheel, on that sporty suspension and fat 17" tires,,, there is no comparison!
     
  4. usbseawolf2000

    usbseawolf2000 HSD PhD

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    The MPGe number on EPA label is 'Wall to Wheels', which takes account of charging loss, and perhaps also the kWh used for pre-conditioning.
     
  5. Bill Norton

    Bill Norton Senior Member

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    But charging losses vary with climate and the owner's location when the TMS is doing its job.
    San Francisco, Phoenix, Montreal would all have different 'Walls to Wheels' numbers.

    For instance, if I arrive home on a hot day with the battery somewhat drained and plug in, I'll hear the fans very quietly running and occasionally the AC compressor comes on for a few minutes at a time.
    If I were to delay the charging until 3 AM the battery and the climate has cooled and it would use less Kwh to top up the battery.
    I don't do this, but I should. I can config the car to charge when I want it to.

    As for Preconditioning, that too is a very personal and optional thing an owner can do.

    Only time will tell which of all the cars with Li-Ion batteries will have the longest life battery pack.
     
  6. rxlawdude

    rxlawdude Active Member

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    I'd put my money it's not GM.
     
  7. john1701a

    john1701a Prius Guru

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    Using the battery exclusively during times of high-demand, rather than starting up the engine for assistance, is a good way to accelerate aging.
     
  8. css28

    css28 Senior Member

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    Based on what? Corporate reputation?

    Remember, the Volt's got the most comprehensive battery thermal management of the current field.
     
  9. Bill Norton

    Bill Norton Senior Member

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    Place Ya Bets !!

    Who else has a liquid heated/cooled HV battery pack. From what I read, Tesla using thousands of 18650 laptop cells is kind of low tech joke, the Leaf does not actively cool the battery. What other cars don't cool the battery???

    111Kw = 160 HP/236 ft-lb of pure silent power!
    So much fun!
    I use it all the time!
    Guilt free!
    I use the "engine for assistance" only when needed, and rarely! It's just along for the ride mostly. Such a waste...

    To wake up a cold engine and immediately "assist with acceleration" accelerates engine wear, big time, I would think.

    It uses ~10 Kwh of the 16.5 Kwh battery. Some say degradation my not show up for a long time as SW would maintain the range by using more of this reserve.
    Leaf are experiencing degradation now, in hot climates.
     
  10. mindmachine

    mindmachine Member

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    BMW i3 uses freon to heat and cool their battery pack, 125kw=170HP, 285ft-lb torque and 22kwh battery pack. Mine will be here in about 6 weeks and I agree pure silent power in a 2900 lb car. 0 to 62 MPH in 7.0 seconds in the BEV,
    0-62 MPH in 7.9 sec with the range extender.
     
  11. Bill Norton

    Bill Norton Senior Member

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    mindm,

    Cool beans! Which one are you getting?
    I'm scheduled to test drive one when they bring the roadshow to town.
    Sounds like fun! I could live with the short highway range in exchange for that EV performance!
    I'm not so sure about gas performance, I'll read about it. What's its gas hwy epa rating?
    Are you selling the PiP?
     
  12. rxlawdude

    rxlawdude Active Member

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    If by "comprehensive" you mean technically complex, I stand by my bet. Comprehensive means lots of failure points, no?

    And let's face it: GM doesn't have a stellar record for quality, long lasting vehicles. I know, the Volt is different. How different and isolated from lesser GM products remains to be seen.

    Tell you what: Let's see which group - Volt or PiP users report the first LiIon battery failures. You know which I'm betting it will be. :)
     
  13. mindmachine

    mindmachine Member

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    I am getting the Rex range extender, I live in rural Ohio 45 miles from Columbus. I have heard from the people in the UK that it gets around 40 US-MPG, the range extender is a 2 cylinder BMW motorcycle engine. Going to keep the Prius plug-in, it belongs to my wife and we both like using it on long trips, so keeping it. The wife would murder me if I sold her Prius.
    Anyway I wanted more EV range and I love driving EV, no noise and acceleration is awesome. What else can I say, I ordered mine 6 weeks ago. I got all the bells and whistles in the Terra model. Can't wait, got rid of my 2010 Lexus GS 350. I am kind of a tree hunger I guess, but not adamate about it.

    I will be able to do about 80 miles on $2.70 worth of electricity.
     
  14. Bill Norton

    Bill Norton Senior Member

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    It sounds like a fun fast car!
    But it's rear wheel drive.
    What are you going to do when the snowpocalypse comes?
     
  15. drash

    drash Senior Member

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    Probably won't be one this winter if the El NiƱo hits as hard as they say.
     
  16. mindmachine

    mindmachine Member

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    No too worried about it, I watched videos of the i3 BEV driving around in the snow axle deep. The i3 with the range extender is even better because the range extender is mounted between the rear wheels. Plus I am retired and I don't have to go anywhere. Ill drive my 4 wheel drive SUV if need be, if it really gets that bad. Plus Bridgestone makes the Blizzak tire in the correct configuration for the i3.

    I haven't found the need to buy winter tires on any of my cars for years. I don't subscribe to all the doom and gloom predictions anyway. I don't think we get the kind of snow storms you get in Kansas. Ohio state highway dept. is really anal about keeping the roads clean and salted here. I hate it, way to much salt is used, cities and county crews are just as anal about it as the state.
     
  17. Bill Norton

    Bill Norton Senior Member

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    Sweet! Sounds like you have it figured out.
    I want to buy steel wheels and Blizzaks someday, but you're right, just stay home that day until things get cleared.

    I'm looking forward to my i3 test drive.
    I'll show up in my Volt and the salesdog will know I'm just there to flog the i3 for the fun of it!
    Can you cancel traction control and break the rears loose?
     
  18. mindmachine

    mindmachine Member

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    I think I read on a i3 forum that you can, would not say im 100% sure though. I am signed up for 2 more test drives before mine arrives. It is so addictive to drive.
     
  19. ny_rob

    ny_rob Senior Member

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    That's what we all cut our teeth on... be it wet roads, snow, etc.. back in the day.
    My first vehicle as a 17yo kid was a 1972 Ford F100 Pickup. Could you think of any better vehicle to learn the correct way of driving on slippery surfaces? All you had to do was look at a corner and she's start fishtailing...
    It's these young punks that can't drive RWD cars :p
     
  20. css28

    css28 Senior Member

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    I drove a BMW 328i for 13 years on all-season tires.

    Even in 1997 BMW equipped the car with good traction control. Nowadays with stability control and an ICE over the rear axle I imagine the i3 will be fine in the snow.