- Jan 19, 2016
2. If you want to use gas less and save more money on a full battery-electric, look at the EPA range rating (not the higher marketing number. For example, Nissan often says the Leaf can go 100 miles. Tesla sometimes says the Model S can go over 300 miles. But the EPA ratings are 73 and 265). Now, subtract 1/3 to account for really bad weather or really high speeds (presumably you won’t do both at the same time). That leaves 49 miles for the Leaf, and 177 miles for the 85kWh Model S.
Those are numbers you can “count on” in your new car. Obviously you can do worse if you take it to the track or something, but as long as you aren’t trying to fail and really want to get somewhere, you will be able to go at least that far. You can take the car on any trip of that length without worrying or doing math; so just make sure your next Model S charging stop is never more than 177 miles away. Math is only required if you want to go farther than that without stopping to charge.
In my Model S 60D (software limited 75) with my heating and driving habits and usual terrain, I get "slightly better than one mile per percent". That's about 80% of the "realistic" figure you quoted above.^^^ I think those paragraphs needs emphasizing. It should be on a placard sold with every EV.
I want to remember to come and look at this thread and similar threads next time I prepare for a long journey, to experiment with optimum driving speeds.