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Recent cross country trip

Discussion in 'Tesla' started by bwilson4web, Jul 2, 2022.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    It is a photo of what the Tesla reports.

    Bob Wilson
     
  2. dbstoo

    dbstoo Senior Member

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    You took a shot of the screen on the tesla, didn't you? That's close enough to qualify as a screen shot. :)
     
  3. Trollbait

    Trollbait It's a D&D thing

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    VW cheating for so long without getting caught is an exception. Which likely because they were cheating on the emissions, not fuel economy. Ford and Hyundai were investigated faster because consumers complain about MPG.

    Public chargers in some jurisdictions can't charge per kWh. An in depth report would include pricing per time, and charging times. Then there is tiered rates at some chargers for slower charge rates to consider.

    That is a lot of detail, and work, for an overview article when the vast majority of charging is done at home.
     
  4. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Sunday around noon, my SO asked me to deliver a dog to Miami FL:
    • Charged car to BMS indicated 199 miles; packed overnight bag, and; loaded car with dog
      • My normal practice is to charge to 67-70% SOC around town to reduce battery stress and hopefully longer life. Then do a charge to 100% for each day's first cross country segment.
    • ~2:00 PM - left and checked into motel at 3:00 AM, ~13 hours, ~1 hr meal and 12 hours driving
      • tested using a slow speed, 55 mph, to achieve longest, first leg
    • ~5:00 PM - returned next day after leaving at 7:00 AM, ~10 hours
      • used faster segments with closer, fast DC charging
    • Total trip (trip reduced to Gainesville FL instead of Miami FL):
      • 995 mi driving ~23 hours, 43 mph average
      • 227 kWh
      • 228 Wh/mi
    Although the range for a single charge can be extended by driving significantly under the speed limit, 55 mph vs 65 mph, and avoiding a charging stop, skipping the charging stop is not sufficient to compensate for the slower speed. Driving back at and above the traffic speed with stopping at every fast DC, SuperCharger station works better.

    To get a closer match between indicated distance and the actual range, a speed of 62-63 mph works best. Faster speed results in a loss of range over the faster travel segments. When traveling at faster, local traffic speed, reset the trip graph frequently to avoid running short. Curious, the accurate 62-63 mph is the optimum speed in our former Prius to match EPA mileage results.

    Changing a trip end-point during a segment drive is less flexible for an EV than a gas car. An EV can be too far from the last fast DC charger to return yet close enough to the planned fast DC charger to reach it. Once committed to a segment, complete it to the planned fast DC charger and then workout the new destination.

    Bob Wilson
     
    #24 bwilson4web, Jul 5, 2022
    Last edited: Jul 5, 2022
  5. dbstoo

    dbstoo Senior Member

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    You keep saying that, but where are the studies that show that the vast majority of BEV charging is done at home? Since you can't commute to work and charge at home at the same time, one or the other has to give. If they are only charging at home on the weekend in California, then that brings them into the punitive rates of up to 50 cents per kWh.
     
  6. Trollbait

    Trollbait It's a D&D thing

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    Where are the studies showing they aren't charging mostly at home? Or even ones where most BEV owners need to charge the car from empty to full everyday?

    If you are going to consider the tiered rates in a local market, then you should consider those car owners with home solar. Even the legacy Teslas with free Supercharger access, or those taking advantage of free charging.

    Again, this is outside the scope of a web blog and moving into research study.
     
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  7. dbstoo

    dbstoo Senior Member

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    Troll, it sounds like you are saying that it's just a blog and isn't really valid. I agree with that. At the same time, it appears that you are just guessing that "vast majority of charging is done at home" since you deflected my question with a question instead of backing up your assertion with an authoritative source.

    A quick search shows that about 57% charge solely at home. even though that's a lot, it certainly is not a VAST MAJORITY.
     
  8. iplug

    iplug Senior Member

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    Much higher than expected. Survey source?

    We charge "only" ~95% at home, almost 100% off peak. Have spoken with dozens of EV drivers and yes, the vast majority add the large majority of their kWh at home.
     
  9. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Recent data:
    upload_2022-7-5_14-33-17.png

    There were two cross country trips: Mom’s and dog delivery.

    Bob Wilson
     
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  10. iplug

    iplug Senior Member

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    1st link not working on my end.

    3rd link:
    EV drivers tend to recharge daily or once every two days, typically overnight at home, and overall, about 70-80% of charging occurs at home or at a workplace parking lot.
     
  11. dbstoo

    dbstoo Senior Member

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    Yep, according to the third one, 70-80% are charging at home or work. The number that charge exclusively at home are in the "about 57%" category.
     
  12. iplug

    iplug Senior Member

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    Good, so you agree with @Trollbait that "the vast majority of charging is done at home"

    the California Air Resources Board estimates that upwards of 85 percent of EV charging occurs at home (California Air Resources Board (2020))
    Have seen a range of guesstimates. These authors estimate 67 percent of charging occurs at home:

    http://rapson.ucdavis.edu/uploads/8/4/7/1/84716372/bbrw_paper_nber_final.pdf
     
    #33 iplug, Jul 5, 2022
    Last edited: Jul 5, 2022
  13. 3PriusMike

    3PriusMike Prius owner since 2000, Tesla M3 2018

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    There have been numerous surveys that ask this question.
    I've owned a Prius plugin (2012-now), Nissan Leaf (2015 - 2018) and Tesla M3 (2018 - now).
    I've gotten at least a dozen surveys via email that ask how, when and where I charge along with lots of other questions. So the data is out there.

    Another way to figure out where people are charging is by using a little bit of reasoning.
    Numerous studies, for decades, show that on average most people only drive 20-40 miles per day.
    Sure, some do less, and some do more. But if you are driving 40 miles per day...that is almost 15K miles per year. If you are only driving 20 miles, then turning around and going 20 miles home why would you stop to charge somewhere and waste your time and not go home? Maybe only if it was at work or if it was free.
    Or if you can't charge at home (in which case you probably haven't bought an EV yet).

    Since "most" people have a cheaper electric rate at home than paying fast charge rates they would logically charge at home: cheaper, easier, don't need to wait. Cheaper because they have solar or TOU plans or EV rates.

    Mike
     
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  14. 3PriusMike

    3PriusMike Prius owner since 2000, Tesla M3 2018

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    The article could have been much better if the author would have included the cost per mile for a similar ICE car and not repeated the same paragraphs of text for each model and just put it all into one, properly formatted table.

    Some other silliness:

    Why even write this? Might as well ask if Ferrari's are accessible for everyone or F-150 luxury trucks.

    In the description of L1, L2, L3 and Destination chargers. Just put the number of KW each can provide, such as:

    L1: 1.2 - 2.4 kw
    L2: 1 to 19 kw usually 6-7 kw
    L3: Tesla 120, 150 and 250 kw (some standards 50 kw); CCS up to 350 kw
    Destination: 22 kw

    Yes, lots of numbers and you'd want a table to show some charging times.
    But he doesn't mention that, primarily for L3, you don't get the full rate for very long. So show an example kw vs time graph.

    Mike
     
  15. Trollbait

    Trollbait It's a D&D thing

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    I wasn't talking of those that solely charge at home, but that most of those that make use of fast chargers do so infrequently. So the higher cost of those chargers only adds a small amount to total fuel costs.
     
  16. dbstoo

    dbstoo Senior Member

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    Nope. That's not what he said. He said that they charged ONLY at home. I pointed out indirectly) that the large number of Teslas have skewed the statistics thanks to widespread supercharges and mutliple promotions that gave away free energy.

    Then there is my quote that said "70-80% are charging at home or work." and Iplug's reply "so you agree with @Trollbait that "the vast majority of charging is done at home""

    Which reminds me of a joke, If a pollster goes to Iplugs street and asked each person: "Have you seen Iplug or your wife naked" and 70% say yes, would Trollbait say that the vast majority of the people where Iplug lives have seen him naked?
     
  17. iplug

    iplug Senior Member

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    Still false, only you claimed he said that.
     
  18. dbstoo

    dbstoo Senior Member

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    Arg! You are right. I confused the content of two different threads. My apologies to all involved.
     
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  19. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Charging Fees iPhone cut and paste failed.
     
    #40 bwilson4web, Jul 6, 2022
    Last edited: Jul 6, 2022