How Much Does it Cost to Charge?

Discussion in 'Prime Plug-in Charging' started by Tideland Prius, Jul 20, 2018.

  1. Salamander_King

    Salamander_King Senior Member

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    Not that I have done any statistics on the data, but no, the number I read off from the Kill-a-watt meter for zero EV to full charge has been consistent 6.5-6.8kwh year around. Of course, some variation exists in numbers when I drove a short distance thus less charge was needed, but for a full charge, it is always more than 6.5kwh.
     
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  2. Arthur McBeth

    Arthur McBeth New Member

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    This a great post, but what does SOC mean and what number applies to my electric bill 5.5 or 6 .3?
     
  3. Salamander_King

    Salamander_King Senior Member

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    SOC = State of Charge
    Your electric bill is always from the wall so 6.3kWh applies. However, if you are using L1 charger that came with the car, I am finding at wall charge is more like 6.4-6.8 kWh. I usually use 6.6 kWh / full charge for my calculation.
     
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  4. Tideland Prius

    Tideland Prius Moderator of the North
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    @Salamander_King got to your question before me :)
     
  5. ReDave

    ReDave Junior Member

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    So... i want to use this to calculate when a charge station might be work paying for, but i'm guessing the filter button is not what i think it is? is there a spreadsheet out there? the formulas are above my ability...
     
  6. Salamander_King

    Salamander_King Senior Member

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    Your calculation maybe complicated. I've never used a public charge station myself, but my understanding is that the method of charge may differ from a station to station. Some charge fee per minute connected. Here I have even read someone reporting that a public charge station continues to charge a fee even after the battery was full. Some others calculate fee by kWh drawn on the session. This would be ideal to compare to the cost of gas. Yet others charge by flat fee. So, unless you can figure out the exact cost of charge per kWh or cost to fill the battery full from zero EV to 100% charged at any given public charge station for the specific session, it would be difficult to compare the cost to gas. The rule of thumb is that if the cost of electricity in $/kWh x 6.3 (in another words complete charge from zero EV) is less than the cost of a half gallon of gas in your situation, using public charger is more cost-effective. This assumes your EV range is approximately half of mpg by gas only.
     
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  7. ReDave

    ReDave Junior Member

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    True, ChargePoint is not clear how much you will be charged, until the end. I've only used it twice, and mostly for fun. Once i was charged 1.13 for 5.78kWh, the next time i was charged 3.30 for 6.55 kWh Yikes. I would like to think somewhere the charge was upfront, but ChargePoint like to put the blame on the location/facility. and it was not obvious what the cost was going to be at the start...
    OTOH both times gave me some EV in town miles, and bumped up my trip mpg to well above 60. Of course, my car, and my experience is way too new to know what straight HV mpg will end up being. That said, I love my Prime, and I'm pretty sure it will beat our 2015 prius, which never really got even 50 mpg. that one was a bit of an anomaly compared to our 2011 prius, and my daughters 2017 prius.
     
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  8. Tideland Prius

    Tideland Prius Moderator of the North
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    There’s this thread too with graphs.

    Gas or Electric: Which one is cheaper for the Prius Prime! | PriusChat


    ChargePoint should show the cost on the screen. Yeah it is up to the individual locations to set the charge rate.
     
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  9. Tha_Ape

    Tha_Ape Member

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    Most L2 chargers by me are free (for now), so is always worth it to plug in when possible. At home it's $0.11/kWh.
     
  10. CharlesH

    CharlesH CA HOV Decal #5 on former PiP

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    In my experience with public ChargePoint stations, the fee calculation was displayed on the screen before starting the charge. The owner of each ChargePoint station determines the fee. This is different from Blink, where the fees are set by Blink based on what kind of account you have with them.
     
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  11. Raytheeagle

    Raytheeagle Senior Member

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    Just used a Blink charger at the Sacramento IKEA this morning and it was $0.59 per kWh.

    Knew the price up front;).

    Then made a Plus account for a better rate in the future(y).
     
  12. Salamander_King

    Salamander_King Senior Member

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    Wow! At that price, unless the gas is above $7/gal, it makes no sense to charge PRIME.
     
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  13. Raytheeagle

    Raytheeagle Senior Member

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    Meh, I had an 85% full battery;).

    It was more for the kids than anything (they like to help “charge the car”):).

    So total charge was $0.79 and we spent $2.97 inside while the kids played for 1.5 hours in Smalland. We were killin time until we had to arrive in Elk Grove this afternoon. Holiday traffic in Nor Cal can be bad on holiday weekends so we leave early:cool:.

    We put flags on the graves of the vets at the Sacramento Valley Veterans Cemetary too. Always a good way to spend the morning recognizing those that have served(y).
     
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