Why can't I get 8.8kwh miles?

Discussion in 'Prime Main Forum (2017-Current)' started by SydneyNJ, May 30, 2019.

  1. fotomoto

    fotomoto Senior Member

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    Yeah, I'm doing the same thing. I did get the adapter to toss in the car with the OEM cable. It's good for 15 amps so should be OK but I wouldn't subject it to daily use; I'd just rewire it for my nema 6-15 plug.

    Obviously hasn't calculated for interference from the continuum transfunctioner.
     
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  2. jb in NE

    jb in NE Senior Member

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    My bad. That would be a significant factor if running at 50Hz instead of 60 Hz.
     
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  3. Trollbait

    Trollbait It's a D&D thing

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  4. fotomoto

    fotomoto Senior Member

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    Ahh, all's well then. Of course, this assumes the parallel dispunctional interger was calculated correctly. Lord help us if it hasn't!!! :eek:
     
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  5. SydneyNJ

    SydneyNJ Junior Member

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    Is this true? From what I understand from the electrician who did the 240 wiring at my place, he said these adapters do not
    and can't carry the required amperage for a 240 line.

    Before I had my 240 installed, I was googling around and came across articles where people were shipping in their OEM
    110/120V charging cable and converted to 240. Then I always wondered if the original supplied oem cable was in
    fact dual 110/240. There are companies who do this type of conversion for around $90. But I decided not to. For another
    100 bucks, i could get a 240 charger and that's what I ended up doing. I have the Zencar 110-240 charger. I can
    use the regular USA outlets or a dedicated 240.
     
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  6. Salamander_King

    Salamander_King Senior Member

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  7. fuzzy1

    fuzzy1 Senior Member

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    But doesn't the Prius draw just the same current from a 240V line as it draws from 120V?
     
  8. SydneyNJ

    SydneyNJ Junior Member

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  9. Salamander_King

    Salamander_King Senior Member

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    No, but I would if I had 240v outlet I can use. Currently, the only 240V I have are being occupied by dryer and oven. Neither can be used conveniently for my car parked outside. Cost of installing a new 240V is too expensive and makes no economic sense for me to spend that much to just increase the speed of charging. Nightly ~6 hr charging with L1 EVSE is working fine for me for now.
     
  10. noonm

    noonm Active Member

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    I was under the impression that that "unused" parts of the battery levels (i.e. below roughly 12% SOC or above 81% SOC in my experience) were there to help extend the battery's life, not for HV mode use. Both very high or very low SOC can speed up the normal wear and tear on the battery, so the Prime keeps those ranges off-limits for use, at least from my understanding.

    That also means that there will always be at least 1kWh of charge and never more than 7.1kWh of charge in the traction battery at any time.
     
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  11. jb in NE

    jb in NE Senior Member

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    It should be pretty close. With the same power draw, double the voltage is half the current. So, if the battery charges in 5.5 hours on 120 and 2.25 hours on 240, and assuming the time to charge is linear with the voltage, then the 240 VAC current draw is slightly higher. Both are going to be around 12 amps.
     
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  12. fuzzy1

    fuzzy1 Senior Member

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    The main bulk charging phase should be approximately linear. But the final taper off phase won't be, and may mess up comparisons.

    I believe I've read that the higher voltage charging is slightly more efficient, due to a lower conversion loss within the charger. This will also slightly skew comparisons.
     
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  13. jb in NE

    jb in NE Senior Member

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    There's only one way to tell. Dig out the clamp-on ammeter and put it on the charge cable in 120 and 240 operation. Start of charge and end of charge, then compare.
     
  14. john1701a

    john1701a Prius Guru

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    A full recharge takes less time for me and it is clearly not linear, see:

    20190530_202745.jpg

    Note that the drop as it reaches the top of usable capacity is why supercharging never goes higher than 80%. Faster & Fuller is not recommended, though so systems allow for override of "full".
     
  15. jb in NE

    jb in NE Senior Member

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    Not following you here.

    It is normal for any battery to get a taper at the end of the charge, where the current drops near the full charge state.
     
  16. jb in NE

    jb in NE Senior Member

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    What is not linear - time to charge vs. amount of charge at start of charge, or the current over time during a charge?
     
  17. ed4271

    ed4271 Member

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    As you can see when you click on the screenshot this is the info I got from my charge port home EV charger. Mai Prime was on HV mode when I plugged it in. The amount of charge I got from it was 5.7 kilowatt hours. I never had it put 8.8 kilowatts into the car. So it is correct that it doesn't put in the full amount of the size of your battery. As you can see in this second screen saver shows you how much the power is costing me. The app takes what's your power company charges and gives you the amount that you are paid out for a charge. As you can see in the month of May. I think it says $23 I paid that's an estimate. 20190601_025300.jpeg Screenshot_20190601-025652_ChargePoint.jpeg

    Posted via the PriusChat mobile app.
     
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  18. jb in NE

    jb in NE Senior Member

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    Are the times shown the time the car was connected to the chargepoint or the time required to charge the car? I would think that with a 240 VAC charger (which this is?), it would charge fully in about 2 hours. Even at 120 VAC, adding 5.7 KWh is about 5 hours.
     
  19. ed4271

    ed4271 Member

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    Usually it's 1 hour 50 minutes if it's fully depleted. Other times it's a lot shorter. Because I leave my car plugged in that's why it's showing a longer time on that. But as you can see it is not charging anything agter it isgully charge. So when the car is completely charged I don't take it off the charger. because it's at night when I'm sleeping or I'm just lazy to go out and unplug it doesn't do any harm. And when it time I leave it plugged in all the time because it comes on and warms up to you the battery. It is on a 40 amp braker. The Chsrgepoint Level 2, 240 volt, 32 amp.

    Posted via the PriusChat mobile app.
     
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  20. ed4271

    ed4271 Member

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    I ment when the temp is very cold out it warms the traction battery.

    Posted via the PriusChat mobile app.
     
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