Projected EPA Range Ratings Emerge for All Versions of Tesla Model S

By Eric Loveday · May 18, 2012

Tesla Model S

Pick your Tesla Model S based on required range. Is it 265 miles? 200 miles? Or is 140 miles sufficient?

The crew over at Motor Trend took some time to extrapolate and analyze Tesla's recently released data to arrive at EPA range ratings for all three versions of the upcoming Tesla Model S.

Accounting for variations in battery capacity, Motor Trend claims the top-of-the-line 85-kWh Model S will likely earn an EPA certified range of 265 miles. That's a bit shy of Tesla's projected 300-mile range. Moving on down the list, the 60-kWh version of the Model S should get a window sticker that displays a range of approximately 200 miles (down from Tesla's prediction of 230 miles) and the cheapest version of the Model S, equipped with a 40-kWh lithium-ion battery pack, should be EPA certified at 140 miles (not 160 miles as Tesla claims) of electric range.

Of course, these numbers are simply educated guesses at this point in time, but Motor Trend's methodology seems to be legit. As Motor Trend states:

"The difference between 265 and 300 miles extracted from the Model S’ substantial 85-kilowatt-hour lithium-ion battery comes down to the EPA’s testing methodology. The stated 300-mile range with the highest-capacity battery was always Tesla’s target. From one perspective, it has actually exceeded the mark, claiming 320 miles under the EPA’s old 2-cycle fuel economy evaluation. It’s when the EPA’s updated 5-cycle test enters frame that 265 miles rears its head."

"Tesla hasn’t disclosed its anticipated EPA ranges for the 160- and 230-mile batteries, but a 12-percent loss like the 300-mile option would peg them at a predicted 141 and 203 miles under the EPA 5-cycle, respectively."

Base pricing for the Model S depends on range, with the 160-mile (40-kWh) Model S starting at $57,400; the 230-mile (60-kWh) version coming in at $67,400; and the 300-mile (85-kWh) electric sedan starting at $77,400. Then, there's the Model S Performance version, which starts at $92,400. Model S deliveries will begin in June.

About the author

Eric Loveday is an automotive enthusiast who is passionate about everything auto. He purchased a 1970 Chevelle at age 16, quickly outgrew its dated engineering and outrageous consumption of gasoline, and sold it off. Eric developed a true passion for automotive writing after graduating from the University of Michigan with a degree in print journalism. Eric spent most of his time since then ...

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Comments

· Anonymous (not verified) · 1 year ago

According to Wiki.answers, "The average American will drive 33.4 miles a day." Even if your range requirements are 4 times the average, the lowest end Tesla Model S will be more than sufficient for your daily needs. You plug it in every night, and it's "filled" in the morning at about 1/8th the cost of an equivalent gasoline equivalent amount of gas). The obsessive concern about range when EVs are discussed simply doesn't coincide with the needs of average drivers who will have more than enough range when using an EV.

Read more: http://wiki.answers.com/Q/What_is_national_average_of_miles_each_America...

· Norbert (not verified) · 1 year ago

@Anonymous; "the lowest end Tesla Model S will be more than sufficient for your daily needs"

For daily needs, yes. However this implies that you either have a second gas car, or would rent a gas car when making longer trips. Many of those who have reserved a Model S chose the 300 mile battery, not for the daily commute, but for the ability to drive further on the freeway.

· Norbert (not verified) · 52 weeks ago

"should be EPA certified at 140 miles (not 160 miles as Tesla claims)"

Minor detail: The range of 160 miles is not just a "claim". It is in fact the range at a constant speed of 55 mph, as Tesla has specified since December 2011. Probably since that was the date at which prototypes where sufficiently close to production to allow a more detailed specification. Similar to the 85 kWH battery, where 300 miles is also specified for 55 mph constant speed, and is not just a projection.

As the graph for various speeds, in the referenced article, shows, there is never a single range number. The range in reality always depends on a large number of factors which will be different in each use case. The EPA 5-cycle number has in theory the advantage of testing a larger variety of conditions, and therefore allowing a representative comparison among EVs. In practice, in so far as I heard, the EPA 5-cycle numbers for the Leaf and the Volt are derived from the 2-cycle numbers by multiplying them with 0.7. If so, then they are theoretical values, not actually measured, making a comparison less valuable.

However, the city range, which is part of those tests, is probably less important for the Model S, as most drivers will need its larger range of 160-300 miles @55mph, not for city driving, but for highway driving. Here the range at constant speeds, depending on the highway speed, will be more important. This is why Tesla has published the range graph, which shows the range at various constant speeds. Tesla has published a similar graph for the Roadster, already a long time ago.

· Anonymous (not verified) · 52 weeks ago

@Norbert Or, you could make some adjustments for those exceptional cases. It amazes me how few people seem to realize that being able to fill up quickly and drive hundreds of miles non-stop is not only something non-truckers very seldom do, it is practically *never* something that they actually NEED to do.

From an energy point of view electric cars are tremendeously important. Few people realize just how large the difference in efficiency actually is. I'm not talking about CO2 impact here - that is considerable, but the really big gains will only come if power production gets cleaner. Rather I am talking about how much energy is expended getting the job done.

A good way to see just how good these cars are is to realize that the energy density of petrol is 10kWh per liter, or 38 kWh per gallon for you non-metric people. In other words, the largest battery pack you can get for the Model S is in energy storage terms equivalent to a tank of 2.24 gallons. That puts it's efficiency into perspective, doesn't it?

· EVNow · 52 weeks ago

@norbert "For daily needs, yes. However this implies that you either have a second gas car, or would rent a gas car when making longer trips. "

Exactly. Just the way you "rent" the seat in an aircraft when flying.

· Norbert (not verified) · 52 weeks ago

@EVNow > Just the way you "rent" the seat in an aircraft when flying

The question for many might be "How often in a year, and for which occasions, would I be willing to rent a car?", not just "Does it cover my daily routine?".

In terms of technology, I'd think there is a potentially large market where you can convince people that they don't really need more than some specific range, but for the mainstream and the big auto manufacturers to see EVs as "the future", and make the corresponding investments in products, product planning, and development, they'd need to convince themselves that EVs are (eventually) capable of replacing (at least mostly) gas cars, altogether. I think that's were EVs with larger ranges (and fast-charging ability) have a very important role for the future.

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