My prime does not stop charging when the departure time is reached

Discussion in 'Prime Plug-in Charging' started by Pattiwagen, Aug 19, 2018.

  1. Pattiwagen

    Pattiwagen New Member

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    I am retired and am home during the day. Our electricity is on a tiered rate with the maximum rate from 4PM to 9PM. I set up my charging schedule to depart at 4PM and start charging at 10PM. I discovered that the charging does not stop at 4. If I remove the charging cable and re-insert it, it does not start until 10. I did open the car door to see that the departure time was set, and it said so, When I opened it again, there did not show a departure time. Does opening the door cancel the departure time?
     
  2. bisco

    bisco cookie crumbler

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    welcome!
    not sure on the prime, but on the pip, you cannot use a start time and finish time. pick one or the other.
     
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  3. CharlesH

    CharlesH CA HOV Decal #5 on former PiP

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    The Prime is the same as the PIP. There is only one timer. It is NOT like an old VCR timer where you set both a start and stop time. Either you pick the departure time, and the system will guess when to start charging such that charging will be complete by the departure time, or you set the start time. If you attempt to set both, the one you set last is what is in effect. This has to be continually explained to new Pip/Prime users, since it is totally counter-intuitive, at least to North American users. Maybe it is different in Japan.
     
  4. mistermojorizin

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    I was gonna post a new thread, but found this one. I want to set charging to stop at 3pm. I set departure time for 3pm. The prime is still charging past 3pm. Why doesn't charging stop at departure time?
     
  5. jb in NE

    jb in NE Senior Member

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    To stop precisely at the end time, the car needs to have a good estimate of both battery level and the time required to fully charge the battery. It's an estimate. At 3 pm, how much charge was in the battery?

    I find that if I set the charge complete time to 30 mins prior to when I want to leave, I don't have a problem. Car at 100% every time.
     
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  6. mistermojorizin

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    So I just switched to the electric vehicle plan and I'm just starting to learn the charge event programming. Here's the situation, got home at 2pm with about 50% indicated SOC and I wanted to set the car to get as much charge as possible before 3pm (start of weekend peak hour). I don't necessarily need it to go to 100%, I just want it to stop at 3pm. So if I set it to stop at 230pm, will it stop charging even though it might not reach 100%?
     
  7. Raytheeagle

    Raytheeagle Senior Member

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    Nope, but you can pull the charge plug and then drive off;).

    Easy and simple(y).
     
  8. mistermojorizin

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    Fair enough. The issue is I'm not trying to drive off, I just want to get some charge in before peak hours and don't want to have to babysit the car.
     
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  9. Raytheeagle

    Raytheeagle Senior Member

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    Then if you don’t have 220 volt connections, you’ll hit the peak rates;).

    Or set an alarm and unplug at 3 PM and then it won’t charge either:).

    Good luck and keep us posted (y).
     
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  10. mistermojorizin

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    That is something I'm considering. Having a faster charger wouldn't guarantee that I don't hit peak either though with the way the software works. :p
     
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  11. jerrymildred

    jerrymildred Senior Member

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    I have not tested this theory and no one has said anything about if you don't plug it in soon enough for it to finish charging before the set departure time, will it keep on charging?

    In other words, if I come home at 4 PM with a depleted EV range and have the timer set to depart at 5 PM and plug it in immediately, will it stop at 5 PM or will it keep charging until either it finishes or I unplug it? I suspect it will keep charging.

    Either way, I typically have my departure time set for about 1/2 hour before I plan to leave in case the car takes longer than expected to charge the battery. It almost always finishes before the programmed time, but hot weather can slow the charging.
     
  12. Tideland Prius

    Tideland Prius Moderator of the North
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    It’ll keep charging. I’ve had mornings where I left later than expected and I still got a full charge.
     
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  13. Mark57

    Mark57 Senior Member

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    I have a departure time set for 4:30am and mine has NEVER run past the departure time for two years now. It's always plugged in more than 8 hrs before departure. That gives the car the time to accomplish what it's being asked to do.

    Right, it keeps on charging.
     
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  14. jerrymildred

    jerrymildred Senior Member

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    Just what I expected. Thanks for confirming it.
     
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  15. jb in NE

    jb in NE Senior Member

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    Another option if you have a home smart hub (and even if you don't). Install a receptacle that can be remotely switched, and set it to power off during peak periods. Then there is no way the car can charge during those periods.

    A smart switch would also work. This one is Zigbee, but others are available with WiFi control.

     
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  16. mistermojorizin

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    Yep, and I do have one and thinking about whether I want to use it or not. Concerned about using one for same reasons as using an extension cord.
     
  17. jb in NE

    jb in NE Senior Member

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    I would give it a try. If it works, use it. If it heats up, then avoid it.

    If you aren’t in a rush to charge (i.e. overnight is fine), you can reduce your charge rate to 8 amps.
     
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  18. Tha_Ape

    Tha_Ape Active Member

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    You can get an old school mechanical timer and plug it into that then set the car to start charging once it gets power
     
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