Question about charging

Discussion in 'Prime Plug-in Charging' started by tonypalermo, Dec 22, 2020.

  1. tonypalermo

    tonypalermo Junior Member

    Joined:
    Feb 4, 2019
    6
    1
    0
    Location:
    Sacramento
    Vehicle:
    2018 Prius c
    Model:
    Four
    Yes very basic question, I read that I should not leave the Prius Prime charged to 100 percent. It's best to charge it to 100 percent and go some place when it's fully charged. When I was working in an office I would just use the timed charge and it would be fully charged when I left the house. I now work from home and don't have a clue when I'm going to a meeting, it's always last minute. Is it better just not to charge it at all and just use gas since I only have like maybe an hour notice from work when I have a meeting in the office? I just don't want to to do anything that's going to make the battery not last very long.
     
  2. Old Bear

    Old Bear Senior Member

    Joined:
    Sep 15, 2017
    596
    917
    19
    Location:
    Boston, Massachusetts USA
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Advanced
    You're going to get a lot of replies about "state of charge," "cold soak," and "charge cycles." If you are sufficiently geekish, there's a lot of interesting information to be had.

    However, in my experience after a little over 3 years with a 2017 Prime, I'd just plug it in when you can and let it decide when to stop charging.

    (Buried somewhere in the manual is something about it being 100% charged when the battery is at 80% of it's capacity and 0% charged when the battery is at 20% of its capacity -- thus keeping the battery within a comfortable range for optimum efficiency and maximum useful life. Also noted is that it's better not to leave the Prime plugged in for weeks on end, like if you left it parked while you went on that African safari that you've always wanted to go on. This, I am told, has something to do with the Prime's various electronic control systems staying awake while plugged in. They run off the 12-volt battery which only gets charged when the vehicle is turned on.)

    The Prime has been designed to be used by the average motorist and really does not need to be overly pampered. Just relax and enjoy its many features and smart capabilities.

    upload_2020-12-23_0-53-14.png
     

    Attached Files:

    MTN, John321, Hicksite and 3 others like this.
  3. AldoON

    AldoON Junior Member

    Joined:
    May 24, 2020
    88
    60
    0
    Location:
    Milton, ON
    Vehicle:
    2018 Prius Prime
    Model:
    Upgrade
    100% with Old Bear's reply.

    Follow best practices as much as possible but don't get so caught up that it takes away from using and enjoying your car.

    I'll add to use common sense too. Leaving the car fully charged for a day or two every once in a while, I don't lose sleep over. If it's an outrageously hot day, I'd avoid leaving it out in the sun all day fully charged.

    An example: I don't have access to charging at home. When I get the chance to charge somewhere else, maybe a couple times a week, I take it even if it means leaving the car at 100% overnight so that I can drive in EV when I go to work the next morning.
     
  4. tonypalermo

    tonypalermo Junior Member

    Joined:
    Feb 4, 2019
    6
    1
    0
    Location:
    Sacramento
    Vehicle:
    2018 Prius c
    Model:
    Four
    Thank you both for your answers. I will totally just use and not be totally worried about if i'm doing it wrong or not. I did not know when I charge it to 100 percent it's actually at 80 percent. Which is good because i'm sure it will make the battery last longer. Thank you again.
     
  5. Salamander_King

    Salamander_King Senior Member

    Joined:
    Nov 8, 2015
    7,480
    6,006
    0
    Location:
    New England
    Vehicle:
    2020 Prius Prime
    Model:
    LE
    Agree with others. Although Toyota recommends not to keep the battery fully charged for a long time, I don't think you will notice much degradation just keeping the charged battery for a day or two. That being said, I am in the same boat as you are. When I had a daily commute pre-COVID, I charged my car every night on schedule. Now, I am working from home and have no daily drive. I keep my car charged at 30-40% most of the time and only charge it fully if I know I will be driving soon after the charge is completed. This way, I have at least 10-15 miles of EV on the occasion when I have to drive a car out of the routine.
     
    AldoON likes this.
  6. jerrymildred

    jerrymildred Senior Member

    Joined:
    Oct 28, 2016
    8,972
    10,980
    0
    Location:
    Tampa, FL
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    Late to the party. Just found this.

    I have an L2 charger so total charging time is about 1:50. When I get into situations like that, I try to leave the car at about 40-50% charge. That way, if I need to go someplace, and that SoC isn't enough, it won't take long to get it up to 90-95% or more. The charge rate tapers off as it fills, so that last 5% of charge takes a lot longer than the first 5%. As I recall, if I unplug when it shows 20 minutes left, it'll be at least 95% charged.
     
    Tideland Prius and AldoON like this.
Loading...