Level 1 and level 2 charging

Discussion in 'Prime Technical Discussion' started by IABoy987, Sep 7, 2021.

  1. IABoy987

    IABoy987 Member

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    I know level 1 and level 2 is 120v vs 240V respectively. From my years of electrical design it would seem that level 1 would be less stressful on the charger "brick" and Prime electronics. It gets the job done for me overnight, so can't see need for 240V.

    I know the "catch on fire" Chevy Bolt would need the level 2 overnight to achieve a full charge to do its 230miles travel.

    Any thoughts why you might opt for level 2 other than "might as well string in the extra wire" ?
     
  2. bisco

    bisco cookie crumbler

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    i like it because i can need a charge to go somewhere at a moments notice. i leave the battery around half full, so it's only a few minutes to 80% or 45 minutes to 100%.
    plus, i'm in and out all day long, constantly topping up the battery. the quicker the better.

    that said, if all i ever did was drive every morning after an overnight charge, i'd stick with level one as well.
     
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  3. john1701a

    john1701a Prius Guru

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    $500.

    That's how much my electricity provider cut a check for with each EVSE line we setup for time-of-use discount.

    We redeemed that offer twice and have been enjoying the discount ever since.
     
  4. Old Bear

    Old Bear Senior Member

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    The OEM "brick" is perfectly happy at 240v. I believe its internal electronics are the same as the unit provided with a different plug when sold with the Prime in other countries where 240v is the standard.

    The device -- technically an "EVSE" -- connects the power line directly to the Prime's internal charger through an actual switch (relay) which is activated by a magnetic coil. Like any mechanical switch, it is either on or off, depending upon what the control electronics sense. (For example, is the charging cable plugged into the Prime and is the Prime asking to be charged.)

    So, when the Prime is charging, the EVSE is strictly a pass-through device. The Prime will draw about 12-amps of current regardless of whether the EVSE is delivering 120v or 240v. That is because the electronics inside the OEM "brick" tells the Prime that it can deliver 12 amps and the Prime's charging circuit responds accordingly.

    Because power in watts is the product of the voltage multiplied by the current, doubling the voltage from 120v to 240v will deliver twice as many watts of power -- and twice as many kilowatt-hours of energy in the same amount of time. But the "brick" is not doing any thing more than acting like a doorman and holding the door open for whatever voltage is being delivered from the outlet.
     
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  5. Tideland Prius

    Tideland Prius Moderator of the North
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    If I'm empty (in HV mode), 1 hour's charge gets me back 60% which is usually enough to do whatever I need to do around town. This way, I can leave the car "empty" (as per the manual) and charge when I know I'm gonna head out (and it's not routine)
     
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  6. dbstoo

    dbstoo Active Member

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    I use level 2 at home, and carry the level 1 in the car for those few times that I want to use it.

    My TOU rates are only low from midnight to 3 PM, so I'm set up to charge any time that it's in the driveway during those hours. I don't like the idea of feeling constrained when I want to take a longer ride, like the quick ride over the hill to the town 12 miles away.
     
  7. route246

    route246 Member

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    I've had mine about 15 months and run local 100% on EV. I have fo force myself to use the ICE in order to use up the gas and refresh it. There are times when I have had to drive 1-10 miles with the ICE running but I don't see the obsession with avoiding using the ICE. I already had mine in for service and an oil change and it seems a little wasteful given the number of ICE miles, other than about 500 when I needed to drain the original full tank is probably less than 50 miles/month, if that. I usually put 3 gallons in when I "fill up" and that 3 gallons last for the 3 months before I force myself to use it up and add 3 more gallons of fresh gas. Those 3 gallons are often challenging to use.

    I only have level 1 at home and don't see any need to get a level 2 circuit installed right now.
     
  8. bisco

    bisco cookie crumbler

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    time to trade for model 3
     
  9. jerrymildred

    jerrymildred Senior Member

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    I often have places to go after work. Yesterday was an example. I charged up at work, so I was about 77% when I got home. I plugged in my L2 EVSE, which supplies almost 16A rather than the OEM EVSE on 240. By the time we left, it was full again. On L1 it would not have been close to full and I wanted all the charge I could get since where we were going is 22 miles away with no charging at the destination. In total, the car went almost 70 miles yesterday and all but the last 12 miles was EV.

    There is a member here, though, who says that he gets 16A from his OEM EVSE at 240V which surprised me. But he charges from empty to full in 1:50 and not the 2:30 or so you'd expect the 12A at 240v.
     
  10. john1701a

    john1701a Prius Guru

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    At 245 volts, my charging is faster than most... 20210917_154046.jpg
     
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