Tesla Model S 60kWh Is More Efficient Than 85kWh Car Why? TeslaChannels com

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TESLA Model S – 60 kWh Auto

Tesla Model S 60-kWh Is Efficient Than 85-kWh Why?

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Tesla Model S buffs may be why the mid-range 60-kWh car, costs $10,000 less, is more efficient than the 85-kWh model.

The EPA said week that the 60-kWh S has a range of 208 miles, and its efficiency is 95 MPGe (miles per gallon

That s about 7 percent than the 89 MPGe rating for the version which has a rated of 265 miles.

Measured from a angle, the EPA says the 60-kWh car 35 kWh of electricity to go 100 miles.

The equivalent number for the longer version is 38 kWh, meaning the car has about an 8-percent edge.

Why the

Tesla Motors [NSDQ:TLSA], its penchant for secrecy about matters, is mum on the subject (although a rep recently told me the company was on an official statement to explain the

Whatever the reason, the numbers Tesla buyers who ve opted for the battery  (like me) feel a better.

The $10,000 jump to the big gains only 57 miles of from 208 to 265 miles. That s $175 per mile.

Looked at way, the 85-kWh Model S a battery pack that s 42 larger to achieve 27 percent range. Not a great tradeoff.

There are a number of possible for the better efficiency numbers of the car the mid-size battery.

*Lighter

Although Tesla has always cagey about battery it s likely that the smaller weighs less. Lower means quicker acceleration the same power, and less resistance at higher speeds.

But it unlikely that a weight of 100 to 200 pounds we re guessing here account for a 7-percent efficiency There s something else on.

Tesla Motors Model S battery pack

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*Improved chemistry?

An unofficial source at hinted to me that the chemistry of the battery is different and better that of the 85-kWh battery.

The packs went into more than six months while 60-kWh packs are now starting to roll off the production

It s quite possible that, in the Tesla has improved its battery

Tesla uses Panasonic lithium-ion lap-top batteries in its packs, making them to update. Perhaps Panasonic has its cells recently?

*Test procedures?

The new 5-cycle EPA include a more vigorous profile.

TESLA Model S – 60 kWh Auto

The 85-kWh battery can more output power to the S drive motor (362 hp vs. 302 If the EPA test includes maximum the 85-kWh car would accelerate faster than the 60-kWh car and use more energy.

If that s the the EPA numbers are not a precise apples-to-apples and the efficiency advantage of the cheaper car is

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It s also whether the EPA tested a standard car, or the more powerful version (416 hp).

If the car was the latter model, this discrepancy would be even

*Software changes?

A recent upgrade tweaked the acceleration of the Model S to provide more at highway speed.

If included in the EPA test car, this may had an effect on the  test although we would have any performance increase to reduce the number.

As you may have noticed, speculation about technical and minutia is a daily sport Model S owners and hard-core buffs.

With luck, will soon put us out of our misery on question.

Until it does, anybody else have why the 60-kWh Model S is more than the 85-kWh version?

David Noland is a Tesla S reservation holder and freelance who lives north of New York

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