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I had a discussion with someone yesterday who was trying to tell me that the gasoline equivalent cost of electricity costing $0.10/kWh was more than $3 per gallon! This sounded way off to me so I did a little investigation. This shouldn't be a surprise to anyone here but the idea that some folks apparently do not understand how much cheaper electricity is than gas really surprised me. Here is what I discovered: The equivalent cost of electricity is much lower than gasoline even at today’s prices. On average, fueling your car with gasoline costs roughly 3 times more than fueling with electricity. In the i3 BEV, it takes 27 kWh of electrical energy to drive 100 miles. At a cost of $0.10/kWh, an i3 BEV costs $2.70 to drive 100 miles. A 2015 BMW 328i uses 3.7 gallons to drive 100 miles. The California average price of regular unleaded is $2.54 today. That makes the cost of driving the 328i for 100 miles $9.40. This is 3.5 times more expensive than the i3.
I use the Lowes Iris for security in my home and I also use my phone app to turn on and off appliances & lights - I have a smart plug on my I3 and it shows not only wattage used but cost per day week and month - with a empty battery its costing me a little of a dollar to fully charge the battery and pre-condition the car.
Prices in California seem a lot different than up here in Mass. The winter rate at National grid is $.24 and regular is currently $2.19 that would change the ratio to 3.5 / 2.54 * 2.19 / 2.4 = 1.25. Considering that the range is also shorter in MA it might be close to 1:1. I absolutely love my i3 but would not have purchased without the large solar system that I just installed.
My example is based on the EPA published values for the 2 cars and the energy.gov site. Twenty four cents per kWh is pretty expensive for home residential electricity? According to the energy.gov site, an eGallon is still $1 less than gasoline in MA.
Last Edit: Jan 19, 2015 13:33:40 GMT -5 by Lou Perez
This is exactly why the gas companies are offering us lower gas prices they know their demise is right around the corner - electric cars will all but take these crooks out of business. Just think how bad we were getting screwed over paying $4-5 a gallon. Every time you fill up - they stuck 100% of what you paid in their pockets while all the long the government let them get away with robbing us.
I traveled 100.1 miles over a 3 day period and measured 39 kWh input, AC. Start and end measurements at 100% charge. California pricing of .11 / kWh and gas at around $3.00. This results in a mileage of 23 miles per dollar. My Escape hybrid at 29.3 mpg coverts to 10 miles per dollar at the current low gas prices. I think the miles per dollar unit is a nice unit to compare.
I traveled 100.1 miles over a 3 day period and measured 39 kWh input, AC.
Your consumption seems a bit high. What was your driving efficiency in mi/kWh? Maybe you were driving at high speeds in hilly terrain with heat on, etc. I have no way to measure input energy, but the energy required for me to drive my BEV 97 miles last Saturday was ~17 kWh which I know is at the low end of the range due to my ideal driving conditions.
Or maybe charging losses are higher than the ~15% that I have always assumed.
2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE