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Calculating how much per year in electricity?

Discussion in 'Model 3: Battery & Charging' started by MatildaModel3, Jul 18, 2018.

  1. MatildaModel3

    MatildaModel3 Member

    Joined:
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    CA
    I'm trying to figure out how to calculate my cost here. I will have a new model 3 with the large battery pack arriving soon...

    Let's assume I drive about 9000 miles per year, and electricity is about 11c/kwh. What's the simple math to figure out how much I'll be spending in electricity?

    Thanks for the help.
     
  2. MarkinArch

    MarkinArch 1st S.A.TX Non Owner TM3 Delivery

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    San Antonio, Texas
    Easy method that doesn't take into account losses at the outlet or vampire drain: Divide the average miles/kwh you expect into 9,000 miles and multiply by $0.11.

    Using my average of 4.2 miles/ kwh it would be about $235 a year.
     
  3. PoitNarf

    PoitNarf The Clown Prince of Crime

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    #3 PoitNarf, Jul 18, 2018
    Last edited: Jul 18, 2018
    Yeah figure an average of around 240Wh/mi (could be in the 220s, totally depends on your driving style). So multiply that by the amount of miles you’ll average in a year. So your 9000 miles a year multiplied by 240Wh/mi gets you 2160kWh. At $0.11 per kWh that would be $237.60. Maybe factor in 15% loss or so due to vampire drain and charging inefficiencies and you’re looking at less than $275 a year. Not bad at all. The Model 3 is shockingly efficient.
     
  4. Glamisduner

    Glamisduner Active Member

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    #4 Glamisduner, Jul 18, 2018
    Last edited: Jul 18, 2018
    29Kwh per 100 miles = .29Kwh hours per mile. (AWD but I'm getting sport rims too?) so I'm not sure if this is correct or if this number is even realistic?
    Tesla Model 3 Long Range All-Wheel Drive & Performance Editions Get Official EPA Ratings | CleanTechnica

    52 weeks * 5 days a week(daily commute) * 82miles = 21,320.
    Probably 1/2 that on weekends on average. = 52 * 2 * 41 = 4,264

    21320 + 4264 = 25,584 miles per year (sounds about right from mileage on my last car, maybe a little short due to road trips).
    25,584 * .29 = 7,419.36 Kwh
    7,419.36Kwh * 1.10 (10% charging loss) = 8160.9
    8160.9 * $0.27/Kwh = about $2203
    or for a more accurate number.
    ($0.47+$0.23) / 2 = .35(average lowest and highest power rates)
    8160.9 * $0.35 = $2856.315

    Using these numbers my ford focus (34mpg was my average)
    25584 / 34 = 752.47 gallons.
    $3.50 a gallon = $2633.64

    So not too much more expensive in fuel costs to drive a nice tesla than a ford focus.

    Also. If I can do TOU -EV Plan.
    8160.9 * $0.09 = $734.48 (Super Off Peak Pricing) + $16 / month additional fee = $192 = $926.48

    But I expect my Power bill will double elsewhere (running AC while at home) (maybe 50% more than now) So at least another $800 or so.
     

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