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Does AC use subsequently increase ESTIMATED EV range?

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by iplug, Jun 10, 2014.

  1. iplug

    iplug Senior Member

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    Anyone else notice this? Typically after I use AC for most of the available battery capacity in EV mode, then following a charge, estimated EV range typically drifts higher.

    Now this could be because it’s been getting warmer. But I have my doubts that it is this alone, because my actual range for the same commute seems to be nearly the same.
     
  2. bisco

    bisco cookie crumbler

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    i haven't noticed it in the past, but that doesn't mean it isn't happening. unfortunately, we haven't had any a/c weather yet this year. my range is only up to 14.7 and it should reach 16+ eventually. i hope.
     
  3. rxlawdude

    rxlawdude Active Member

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    The estimated range decreases approximately 10% when the climate control is on. Even if A/C is "off" and only the fan is blowing.

    Perhaps when we discuss estimated (and actual) EV range, we should take care to include whether the fan and/or A/C was on or off.
     
  4. iplug

    iplug Senior Member

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    The question is using AC in EV mode, then charging, then looking at estimated EV range.

    For example: drive the car in EV mode one day with AC running most of the time. Come home, park the car, plug-in to charge. Come back after charge, turn on car (but not AC yet) and EV estimated range is 0.1-0.3 higher.

    It is known that EV estimated range decreases while AC is currently running.
     
  5. rxlawdude

    rxlawdude Active Member

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    Again, my point is that when you turn anything on in Climate Control, the estimate goes down identically. Fan full blast? Fan on low? A/C on? A/C off? All have the same effect on the estimate, which makes no sense from a physics standpoint. So there's clearly a software flag for CLIMATE on/off without respect to what the actual draw is.

    I'll check out your sequence you outlined, but I think we make far too much of the "estimated" EV miles than we should.
     
  6. iplug

    iplug Senior Member

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    It’s a technical question of interest and has little or no practical value. The estimated values matter little - just curious if others had seen the same phenomenon.

    Not sure where the miscommunication is. What you mention is a different topic already covered extensively in other threads.

    I’m not asking about what happens to EV estimated range when AC/fan/etc goes on. Only want to know if others see the estimated EV range go up AFTER AC has been used for a while, specifically after the next charge.

    That is, every time one gets in the car after a charge and turns the vehicle on, a fully charged estimated EV range is noted. If the AC has been used recently (last time car used), I notice this estimated range goes up 0.1-0.3 EV. Agree, it’s almost certainly a software thing. We know this is not actual range, but the fact that the AC was run the last time seems to be related.
     
  7. bisco

    bisco cookie crumbler

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    i think you're pretty clear. how much higher have you noticed? it's hard to distinguish cause if weather is warming.
     
  8. iplug

    iplug Senior Member

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    If I run AC for most of the time in EV mode, after the next charge I typically get 0.1-0.3 miles additional on estimate. The actual range seems unchanged. If I then ride the same route that day without AC, the range usually drifts back some after the next charge. You're right though, hard to tease out if the battery is liking the warmer temps that neccesitate AC.

    Oh yes, and sorry to hear your range "is only up to 14.7" :)
     
  9. retired4999

    retired4999 Prius driver since 2005

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    Nobody is crying over my 12.4.
    Pooooooooor me!!!!!!:cry:
     
  10. iplug

    iplug Senior Member

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    Don't worry, retired4999. Summer will find you soon enough and you can go back to setting records.
     
  11. bisco

    bisco cookie crumbler

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    an interesting experiment would be to do the same ev route everyday with the a/c on, and see when/where the estimate stops increasing.
     
  12. CaliforniaBear

    CaliforniaBear Clearwater Blue Metallic

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    Interesting... We went to lunch yesterday with the A/C blasting (outside temp around 95F) and returned home with less than the usual 1.2 miles of EV left. This morning, fully charged, the EV showed 12.1 for the first time since winter. Of course we never had a real winter but that's a whole different problem :(
     
  13. retired4999

    retired4999 Prius driver since 2005

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    Yep! 12.6 today's est. but actual for the last four day's has been 16.3 to 17.3 so things are slowly moving up!:)
     
  14. Astolat

    Astolat Member

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    Just speculating, but if the system shows 10% less because the AC is on, but it is not on high enough to actually reduce range by 10%, then maybe the software compares actual to its reduced estimate and assumes that the estimate of how many miles can be done per Kw needs increasing. So next time you turn on with a full charge and no AC the estimate has gone ujp.
     
    rxlawdude and bilbo04096 like this.
  15. bisco

    bisco cookie crumbler

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  16. vvillovv

    vvillovv Senior Member

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    I just got mine, finally, 31may... 14 plugin / 400 mi on the odm ATM.
    I'm still figuring out howto almost everything.
    About a 100 miles ago my EV range changed from 12.something to 14.something. I need to start taking pics today.
    - I've only turned on a/c for a few minutes once while driving and a few times so far while charging. -
    With the 14 the doors lock and the a/c runs for 10 minutes from the 120v while the car is plugged in, or from the traction pack if not plugged in, but if plugged in the charge rate drops about 1kw - depending on the initial charge rate - while a/c is on.
    I have split charging almost evenly between mostly 30amp/240v and the 12amp/120v oem charger that came with the car. The oem charges my car from, no EV charge to, full EV charge, in 3 hours at 1.1kw and the 30amp/240v chargers I've accessed so far charge the car in 2 hours at 1.9kw.
    I'm still looking for a charger that will charge the car in an hour,
    I'm hoping one of the 70amp/240v chargers I've found in canada will do that.
    So far I've only made it home from one of the 30amp/240v chargers using only EV once
    but I've done maybe 5 all EV runs, then reconnected to the oem charger.
    I'll do a couple all EV runs with a/c on today and/or tomorrow and see what happens.
    But it also may take more than a day or two to see a difference.
    keeping my fingers crossed.
    I'll also update my profile later
    so please be patient with me, ok.
     
  17. bisco

    bisco cookie crumbler

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    welcome and congrats, there are no one hour evse's, due to the charger design of the car. an L2 charger will do about 90 minutes more or less, and there are plenty to choose from. all the best!(y)
     
  18. retired4999

    retired4999 Prius driver since 2005

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    Keep up the good work!(y)
     
  19. bisco

    bisco cookie crumbler

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    thanks, i'll try.:X3:
     
  20. retired4999

    retired4999 Prius driver since 2005

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    No problem!
    You are welcome! :whistle: