Two days ago the screen in my 2020 Chevy Bolt told me I had driven 1080 miles and had used 282 kW-hr of electric charge. I quickly did the math:
1080 miles / 282 kW-hr means
3.8 miles / kW-hr
But I wanted to know how many kW-hr were needed for a run of 30 miles. I needed that number because most cars running on gas give you 30 miles per gallon.
The answer is 7.83 kW-hr. Chevy Bolt will consume 7.83 kW-hr in running a distance of 30 miles.
At my home I am using the special PG&E EV tariff. During off peak hours (i.e., from 12 midnight to 3 pm) my electricity rate is $0.17/kW-hr.
To charge my car 7.83 kW-hr, I pay PG&E 7.83 X 0.17= $1.33 [Of course, there are other charges and taxes besides the actual energy usage, but let's not make things too complicated at this time.]
Currently, gasoline is selling for $3/gallon, in northern California. If Chevy Bolt numbers are correct, I am saving $1.67 in every 30 miles the car runs.
