Tesla's batteries aim to rework the math for electric cars and the grid

Re:Tesla's batteries aim to rework the math for electric car... by kube-system on Thursday May 14, 2020 @02:01PM (#23183056)

I don't think many people realize that MPG is not a linear measure of fuel/energy consumption.

https://nudges.files.wordpress.com/2008/06/mpg-graph.jpg

If an average driver (12,000mi/yr) switches from a 12 mpg car to a 15 mpg car, they save 200 gallons of gas per yr.

If someone who drives the same distance switches from a 60 mpg car to a 63 mpg car, they save 10 gallons of gas per yr.

If someone who drives the same distance switches from a 133 mpg car to a 141 mpg car, they save 5 gallons of gas per yr.

[ Parent | on HN ]

Re:Tesla's batteries aim to rework the math for electric car... by tomjakubowski on Thursday May 14, 2020 @02:28PM (#23183392)

I agree that subtraction is not especially helpful when comparing two cars fuel efficiency using MPG. A simple way to frame it is that doubling MPG halves your fuel needs for the same distance.

[ Parent | on HN ]