Nice job and good points.Where does that 4 to 6 times come from?
It's a tad tricky to directly compare energy costs. The feds apparently have a website that compares regular gas to an "eGallon"
Using their calculator it's showing roughly a 2:1 ratio today.
Examples:
Here in Ohio they show gas at $2.16, (though I saw it at $1.59 at Marathon today) and an eGallon at $1.04 ("average cost of electricity for the state"). Still cheaper, but certainly not 4 to 6 times cheaper.
Another example, California, they have gas at $3.32 and eGallon at $1.76. So both gasoline and electricity appear to be a little more than 50% higher than here in the Midwest.
The definition of eGallon seems a tad flexible since they are trying to compare "similar vehicles". Does that compare a Volt to a Cruze and a Tesla S with a Mercedes E Class? Unclear to me. Which cars they compare and their specific mpg would seem to matter a lot.
From these rough numbers it appears to me that high mpg ICE cars are "fairly" competitive with EVs even today (my diesel MB E250 get's almost double the mpg as the gasoline powered MB E350 for example).
And gasoline is pretty cheap these days and with the US becoming a net exporter of oil (thanks's to the fracking revolution) it should stay reasonably priced for a while.
I just don't see that huge price advantage of using electric over oil you mention.
Cost per mile is the common way to compare.
I've seen that in a few presentations (GM as an example) and there are sites like the inl.gov (https://avt.inl.gov/sites/default/files/pdf/fsev/costs.pdf) that give you other ways to present/compare them.
Gas prices vary quite a bit depending on the state you are in and even area within the state. For example in Chicagoland we have our own refineries and additives for 'cleaner' gas so our gas is high. See GasBuddy chart below. You can go there and zoom in on the map to diff areas.
Electricity prices vary significantly as well. In some places the have off-peak charge rates, separate tiers, and even hourly rates.
These can be significantly cheaper than the normal prices you pay for electricity. High electricity areas often have high gas too (at least in the NE and SW).
I am on an hourly electrical rate and our cars charge off peak when the rates are cheaper. Plus I have much less impact to the grid by doing that. My prices are probably 4-5 times cheaper.
Many also like the fact that electricity is getting 'cleaner' each year at a much much faster rate than gas/diesel is getting 'cleaner'. See chart at very bottom. All the states are in there. North Carolina is an interesting one and a potentional retirement location for us for various reasons. How electricity generation changed in your state -- site: https://www.nytimes.com/interactive/2018/12/24/climate/how-electricity-generation-changed-in-your-state.html
Gas
Electricity
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https://avt.inl.gov/sites/default/files/pdf/fsev/costs.pdf
How electricity generation changed in your state -- site: https://www.nytimes.com/interactive/2018/12/24/climate/how-electricity-generation-changed-in-your-state.html
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