Thursday, June 25, 2020

Chevy Bolt EV mileage--EV mileage vs gas mileage



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.


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