My EV Driving ratio

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by usbseawolf2000, Oct 31, 2012.

  1. usbseawolf2000

    usbseawolf2000 HSD PhD

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    EV Ratio (1).gif

    So far, I have 27% on EV and 73% on HV. I started charging after about 158 miles on odometer with 1% EV and 99% HV. So, my EV ratio is raising. I will continue to update this thread with updates.

    Gasoline Efficiency

    264 miles divided by 4 gallons = 66 MPG

    Electricity Efficiency

    23 kWh (x 1.15 for charging loss) divided by 102 miles (times 100) = 25.9 kWh/100 miles

    Overall Efficiency

    4 gallons + 0.785 gallon equiv = 4.785 gallon equiv. 366 total miles / 4.785 gallon equiv = 76.5 MPGe.
     
  2. John H

    John H Senior Member

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    23kWh at the plug or in the battery?

    4 gallons measured at the pump?
     
  3. usbseawolf2000

    usbseawolf2000 HSD PhD

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    They are what car reported with numbers rounded so, accuracy will increase with more miles.

    kWh does not include the charging loss so I just added 15%. Thanks!
     
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  4. John H

    John H Senior Member

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    just harassing you :)
     
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  5. usbseawolf2000

    usbseawolf2000 HSD PhD

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    The key number is, 23 kWh of electricy was used to save 1.9 gallons of gas.
     
  6. John H

    John H Senior Member

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    at 66mpg, 1.9 gallons would have carried you 125.4 miles, but that 23kWh only carried you 102 miles. slacker :)

    maybe that 4 gallons was about to roll over to 5 (52.8mpg) ? 1.9 * 52.8 = 100.32
     
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  7. Adam Leibovitch

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    I think the gallons used is rounded down and the gallons saved uses the actual parameters in that drive ratio to calculate gallons saved.
     
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  8. usbseawolf2000

    usbseawolf2000 HSD PhD

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    102 electric miles / 1.9 gallons saved = 53.7 MPG -- I must be getting.

    264 gas miles / 53.7 MPG = 4.92 gallons consumed.

    It is possible that the display is truncating to 4 and it is about to roll to 5.
     
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  9. John H

    John H Senior Member

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    53.7 MPG ? The other PiP drivers are going to kick you out of the club.
     
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  10. Adam Leibovitch

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    Maybe, let us know when it changes. They should have done 10ths of a gallon.
     
  11. drinnovation

    drinnovation EREV for EVER!

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    Not bad.. are you charging just at home?
    What's your average drive (conditions/speed?)

    25kw/100m is what I got most of the summer on EV. getting colder now and I've lost my beloved voltstats so won't have a good estimate until my next power bill (too lazy to track it by hand every day).
     
  12. usbseawolf2000

    usbseawolf2000 HSD PhD

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    I am one of those lucky ones that can telecommute. I no longer have the 85 miles round trip commute that I used to do with my 2006 Prius with 164,000 miles.

    I only charge at home but I can do multiple "top offs". Majority of my trips are within 3 miles radius. That include dropping off / picking up wife at the subway and for our chore (supermarket, hair cut, eat out, movies, post office, malls, etc).

    The car reports an average speed of 22 mph. The true average should be higher than that since I don't know how long it sat at the dealer, turned on (0 mph).

    When I need to go longer distance, I use EV mode for city traffic and HV mode on the highway. Since my home and destinations are close to the highways, I end up using the extra EV miles at highway speed. That's why my electricity consumption is higher than I would like but I am learning and using those EV miles more wisely on the highway. My last trip yielded 17 EV miles.
     
  13. John H

    John H Senior Member

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    Have you setup an instantaneous kWh/100miles gauge on Torque yet? Or is there one already in the PiP's MFD?
     
  14. usbseawolf2000

    usbseawolf2000 HSD PhD

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    I got Torque and custom PIDs loaded for PiP. I don't have a good place or equipment to mount it in the car yet, so I have not been using it much. I am still getting used to the car before taking a deeper dive.

    In the EV mode, MID displays the instantaneous EV power bar. Since the battery can supply to up 50 hp (38 kW), I can judge how much power I am using.
     
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  15. usbseawolf2000

    usbseawolf2000 HSD PhD

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    Just went out for lunch. Round trip = 0.8 miles.

    EV ratio raised to 28% so HV is at 72% now.
     
  16. drinnovation

    drinnovation EREV for EVER!

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    Gotta watch it.. chasing the EV ratio is addactive.. reporting every .8 miles will generate a lot of posts..
     
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  17. usbseawolf2000

    usbseawolf2000 HSD PhD

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    Short trips like that kills MPG in my 2006 Prius. Now, they are increasing my EV ratio. :)

    I'll be happy if I can put 1/3 of my miles on EV. EPA estimate 29% so if I can get 33% or higher, I'll be happy.
     
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  18. usbseawolf2000

    usbseawolf2000 HSD PhD

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    I checked when the HV mile was at 275 and it said 5 gallons so that backward calculation appears to be correct.

    120 EV miles / 2.2 gallons saved = 54.5 MPG

    54.5 MPG * 5 gallons = 273 miles

    Anyway, my EV ratio is now 29% -- what EPA predicted. Since I have mostly short trips than normal, I will surely go over that.

    EV Ratio.JPG
     
  19. Adam Leibovitch

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    Cool thanks for checking, I think the calculation they use is limited to a certain time period, or resets if you change the other EV ratio, since they move together.

    I haven't had too many long trips this month and have been able to get free L2 charges in santa monica and beverly hills during the day. My HV mpg is pretty low. I don't drive very slowly in that mode, and I am also there for 2-4 miles at a time on average so I guess the ICE is on a lot of time to keep warm. But I did inflate my tires yesterday. They were pretty low, like 29psi, so hopefully that helps. 20121102_102129.jpg
     

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  20. usbseawolf2000

    usbseawolf2000 HSD PhD

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    You are still getting 50 MPG on gas. That's right inline with EPA figure.

    102 kWh + 15% / 435 EV miles (times 100) = 27 kWh / 100 miles. You are beating the EPA estimate.

    68% EV ratio? WOW. (y)

    Yea, pump up the tire pressure. Mine is at the recommended 35 psi.
     
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