Electricity Cost vs MPG

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by CaliforniaBear, Oct 12, 2012.

  1. Corwyn

    Corwyn Energy Curmudgeon

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    $0.12 was including federal tax credits though not tax benefits, nor state tax credits.
     
  2. Rebound

    Rebound Senior Member

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    What you're saying doesn't make sense to me. You said that, before you got your PiP, you consumed less than 351 kWh/month. You pay 13 cents/kWh for that electricity. Your Prius consumes an additional 90 kWh/month, which is all Tier 2 power, which costs you 15 cents/kWh.

    So it's 351 x 13 cents = $45.63
    +
    90 x 15 cents = $13.5
    Total = 59.63

    If you exceed Tier 2, only that additional overage is billed at the outrageous 30 cent rate.

    As for reducing your consumption, you're way off-base. True, you could make all of those efficiency investments. But the bang-for-the-buck is replacing an electric dryer with a gas dryer. You can get rebates, and the cost savings is pretty dramatic. Electric dryers consume about 4,000 watts, and run for a very long time -- every hour is 4 kWh, so you could easily be burning 40 or 100 kWh a month on your dryer.
     
  3. devprius

    devprius /dev/geek

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    We finally replaced our electric dryer with a gas one a couple of years ago. Our electric bill dropped by a lot, and our gas bill only went up by a small amount. At least a $100 a month in savings. In retrospect, it's something we should've done as soon as we bought the house 13 years ago, but we had just bought the washer & dryer earlier that year and were loathe to replace the dryer after buying it so recently. Had I only known.
     
  4. cwerdna

    cwerdna Senior Member

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    ^^^
    On the above, I'm not sure even have a gas line in the laundry room so switching would be out of the question, unless I got a gas line run.
     
  5. ryogajyc

    ryogajyc Active Member

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    Electricity cost is not used for determining MPGe, which uses the energy content of gasoline. Electricity cost is a necessary factor in calculating the cost per mile.
     
  6. John H

    John H Senior Member

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    A friend got one of the new "condensing" clothes washer/dryers. It seems to use much less electricity than a conventional heating element based dryer plus he can throw a load of wash in at night and have dry clothes in the morning. It even has a setting so that it finishes at a scheduled time and he can take things out and hang them right away.

    LG WM3987HW: Front Load Washer Dryer Combo | LG USA


    edit: my friend corrected me in that it might not use less electricity, just less expensive electricity since he can run a full wash and dry load unattended overnight.
     
    DadofHedgehog likes this.
  7. raimix

    raimix Member

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    Interesting.
    Doesn't ventless condensing dryer consume more electric compare to regular vented units.
    Comparing load to load, not time operated.

    My old dryer which came with the house 12 years ago might need replacement perhaps
     
  8. Corwyn

    Corwyn Energy Curmudgeon

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    One will also need to compare the energy lost from the house. A vented dryer is blowing a lot of heated (by one's furnace) air out of the house to be replaced by cold air from outside. It is complicated.
     
  9. John H

    John H Senior Member

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    Good point. I called him to see and he said he hadn't really paid attention to the actual electrical usage. He get's free electricity from 10pm - 6am and with this unit he can set it to start washing at 10pm and it is finished drying at 6am.
     
  10. wjtracy

    wjtracy Senior Member

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    ...that is very interesting LG combo. I recently bought an LG high efficiency top loader washer. Its nice.
    I only paid $150 for it on sale and after state green rebates. John- might be worth reporting under envrio thread for some further discussion. Would be nice to timer wash for overnight and then get lower utility charges at nite.
     
  11. raimix

    raimix Member

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    $150? lol .
     
  12. Adam Leibovitch

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    New PiP owner here.

    How does the cost of an hourly ChargePoint station compare with the cost of an hour of home charging? I figure you wouldn't be saving much on gas...say an hour L2 charge gets you 5-6 miles EV, thats only $0.45-$0.50 saved in gas max, and $??? in electricity. (not sure if you can even aggregate the savings, as the more you save on gas the less you save on EV since you'll most likely plug in til the same full charge you would have done, had you not used the ChargePoint).

    So I figure, unless the ChargePoint is free or less than $0.30-$0.40 (not likely), its more economical to bypass the chargepoint fee in favor of gas/ home kwh?
     
  13. wjtracy

    wjtracy Senior Member

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    right I got a $800 washer for $150 ($350 green rebate)
    States can go overboard or slightly bad aim with green credits.
    One state I am thinking PiP is $17500 after credits.
     
  14. CaliforniaBear

    CaliforniaBear Clearwater Blue Metallic

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    12 amps sounds for the 15 amp circuit and a measured 11.79 amps sounds reasonable. That would be 4.3 KWH which is about the battery capacity with consideration for charging efficiency/heat/whatever. Ways to stay in the 2nd PG&E tier are good especially adding solar. If you're stuck at 3rd tier prices it doesn't look like the plug-in has any advantage for those electic miles.

    All the responses to this thread show the complexity of the subject and the non-realistic simplicity of related mpg advertising. I love the technology and the efficiency. Driving in EV mode using energy from going down hill and stepping on the brakes is like sailing with the wind instead of using the motor.
     
  15. Right on the charging block on the cable, 12 Amperes, using a Watt Meter it shows a ,little over 3 KWHrs. 12 X 110 = 1320 watts for one hour. These numbers vary slightly based on many factors.
     
  16. Where ever you live, I'm moving there!
     
  17. KWHr charge .022, That's nice.
     
  18. ukr2

    ukr2 Senior Member

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    terpsmandan, Glad to know there's another PIP in the Area. Welcome.
     
  19. Rebound

    Rebound Senior Member

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    Not really, as long as your home has gas, a contractor can run a gas line, it's not rocket science. It's just a pipe with a fitting, just like plumbing. Car aside, your energy cost savings will likely offset the expense.
     
  20. terpsmandan

    terpsmandan Member

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    We should all wave to each other, like Jeep Wranglers and CJ's do. 05 TJ is now my toy.