Plug-in Prius results at 10,000 miles

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by Rebound, Oct 8, 2012.

  1. Zythryn

    Zythryn Senior Member

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    Re: Rebound

    Ah, absolutely, it is the biggest factor to the amount of gas you use. Which is why picking the vehicle that most closely matches your driving patters has much more effect than who makes each particular car.
    Drive 15 miles between charges? PiP is perfect.
    Drive 35 mile? Volt.
    Drive 20? C-Max energi (from what we know at this point).

    As infrastructure gets built out, it will help most all PHEV owners to use less gasoline and some BEV owners (those that occasionally need a gas burner and will need it less often).
     
  2. usbseawolf2000

    usbseawolf2000 HSD PhD

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    Ok, about 30% more gas but the cost difference between the regular and premium gas has to add in. But how much more electricity?

    Calculation:

    10,000 miles / 85 miles trips = 118 trips.

    Prius PHV: 3.1 kWh per charge x 118 times = 366 kWh of electricity.

    Volt: 12.42 kWh per charge x 118 times = 1,466 kWh of electricity.

    That's about 400% higher electricity usage.
     
  3. priuskitty

    priuskitty PIP FAN

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    how do you get 118 trips? 15 miles EV PIP. 40 MILES EV VOLT?
     
  4. jsfabb

    jsfabb Active Member

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    My point exactly!

    BTW - we are both from LI.
     
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  5. usbseawolf2000

    usbseawolf2000 HSD PhD

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    It depends on individual. I think the universal factor is to use the least amount of energy which translates to lower emission.

    For him, Volt's EV/HV ratio would be 45% EV and 55% HV. He'll get way below 60 MPGe (based on 64% EV @93 MPGe and 36% HV @ 37 MPG). With Prius PHV, he is getting 61 MPGe.
     
  6. drinnovation

    drinnovation EREV for EVER!

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    Rebound live in the world of crazy tiered pries with weird rate choices and I'm not qualified to guesstimage his costs.

    If it were at my rates, I pay .07kWh ( a belend of .05 and .09 + taxes) for TODU rates with all taxes and fees. A full charge of 13kWh costs me $.91 I've not bought gas since april but the web says gas here is running $4.00 for premium and $3.80 for regular. So for the Volt (with premium) the fuel cost would be $5.61. For the Prius it would be 3kWh (=.21) + 1.54*3.8 = 6.06 or about $0.45 more per day, which is about 8% difference. Its a smaller percentage because the cost of premium vs regular as well as the cost of electricity.
     
  7. drinnovation

    drinnovation EREV for EVER!

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    Agree is depends on the individual. But your statement he would be "way below 60 MPGe" is not based on his driving style, otherwise he would get well below 58 for a Prius PHV. The fact that he is above average in a Prius PHV suggests he drives more efficiently than the EPA average and so would likely be above average in a Volt.

    Since rebound is in the Bay area, EV miles are much cleaner than average at about 110g/mile for the volt, and just a bit higher for the PHV's 11 "EV' EPA miles (but we'll use the same 110). The using EPA data as I I estimated above, At 13kWh + 1.175 gallons he would be at about 14520 g/CO2 in a Volt and for 3kWh + 1.54 gallons his overall emissions would be about 14720 in a prius PHV. Rebound is an above average efficiency driver so his numbers would be less than both of those but its comparable with a slight edge ( 242g) to the Volt.
     
  8. lensovet

    lensovet Not your typical youngin :)/BP Brigade 207

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    The way below statement comes from the fact that he can charge only once and his EV/HV ratio would not be as high as the EPA numbers assume. He'll get the 40 miles of EV but then needs to drive the remaining 45 in HV mode with much lower MPGs and much higher fuel costs. Premium gas here is $4.90+/gallon.
     
  9. Rebound

    Rebound Senior Member

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    My city has its own municipal power. They cannot afford the expensive software for SmartMeters, so right now, they have an honor system-based program which credits you $15/month if you own a plug-in and charge it only off-peak (on the honor system). At 12 cents/kWh Tier 2, my net cost to charge my car once/day is about -$3.00 per month. (Yes, they pay me three dollars a month to charge my car).
     
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  10. ryogajyc

    ryogajyc Active Member

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    I was assuming that the neither EV miles nor kWh were being recorded at high speeds since the MPGe was unusually high, which appears to be mostly correct since Rebound switches to HV at high speed.
    I don't think it's possible to draw any conclusions from the EV only MPGe you calculated, since I don't think it is a valid number. To calculate EV only MPGe, you need the EV only miles and the EV only kWh consumed. Since the kWh reported includes blended driving kWh consumed, there's no way clear way to calculate EV only MPGe unless you never consume any gas. The only valid MPGe that can be calculated must include both electricity and gas.

    And even if it was driven only in EV, since it only includes speeds of 62mph or slower, it can't be used to directly compare with the Leaf or Volt numbers (unless they are driven at 62mph or slower as well).
     
  11. Rebound

    Rebound Senior Member

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    Au contraire, mon frere! The EPA tests reach a maximum speed to 60 MPH.

    But, as I said, I only have the data I have. I have no desire for inaccuracy. The car may be under-reporting its electrical consumption, but on the surface, the data appear reasonably accurate, such as the alignment of actual MPG to my Fuelly calculation and the kWh charged. If I charged once per day since getting the car, it should be about 540 kWh. A few days I've charged twice and some I didn't charge at all. Maybe the reported figure is a little low, but it's in the ballpark. If I use 540 kWh, the MPGe figure is 100.4, which is what we expect it to be.
     
  12. drinnovation

    drinnovation EREV for EVER!

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    Maybe you could not (or take a phone pic) of EV milage and kWh when you start on highway (assuming you keep it > 62mph.. then again when you get off.. then we'll see if EV miles increase.. and if kWh change.
     
  13. Rebound

    Rebound Senior Member

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    Great idea! Except that the Plug-in Prius doesn't display it's charge in kWh, it displays estimated remaining EV miles.
     
  14. drinnovation

    drinnovation EREV for EVER!

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    Well its not hard to tell if it used kWh..so that is not critical. Pretty sure you can used the full charge on the way to work.. or do you turn it off to save it for the slow part of the 85mile trip.

    The real question is how EV-Boost miles are counted.. are the HV, EV or some mix (i.e. is 20miles of EV boost counted as 10HV and 10EV? )
     
  15. RBooker

    RBooker Member

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    Just purchased a 2012 PIP. I tracked or vehicle use over the past few months. I wanted to use the data to select the best care for 'our' job. Turned out that ~80% the round trip mileage was 15 miles or less. When you consider the current incentives from TFS ($3500 rebate & 0% interest on a 60 month loan) the PIP is the most bang for the price. We expect to use excess solar production to cover ~40% of miles driven.
    The only unknown is how the battery will perform during the winter months.
     
  16. bisco

    bisco cookie crumbler

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    congrats and welcome to p/c. all the best! yes, we're all waiting to see what winter brings.:)
     
  17. john1701a

    john1701a Prius Guru

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    What are the expectations?
     
  18. bisco

    bisco cookie crumbler

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    lower ev range?
     
  19. john1701a

    john1701a Prius Guru

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    When the engine runs for heat, some EV is replenished.
     
  20. bisco

    bisco cookie crumbler

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    heat!?! we don't need no stinkin' heat in new england!:cool:
     
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