Battery weight of 70 vs 85kWh?

Battery weight of 70 vs 85kWh?


I am in the process of ordering a model S and cannot decide whether it will be a 70 or 85 model.

One reason for decision could be is 70 batteries are lighter than 85.

It seems that 70 have 14 modules vs 16 for the 85. 350V vs 400V

So if the 85 battery weight is 600kg then the 70 should only be 525kg which is like driving with one person less...

What do you think?


EVRider | September 27, 2015

I think you'll be happy with the handling of either one, so buy the 85 to get the extra range. If you're concerned about it, test drive both and see for yourself.

prp | September 27, 2015

The acceleration times of each are in the design studio, and due to the larger motor the 85 is marginally quicker than the 70, even with the additional battery mass.
Don't buy the extra range if you don't need it. Only you know how much you drive each day.

buickguy | September 27, 2015

I agree with prp; buy what you you need and only you know what that is. You may take into account changing circumstances. When I bought my S85, I knew that there was just one supercharger between me and the Sierras, which I needed to visit twice a month. Now, 18 months later, there are 4 superchargers plus supercharger alternatives close to home. If I were buying today, I would get a 70D.

EVRider | September 27, 2015

I took it from the OP's question that he preferred the 85 but had concerns about the extra weight, and responded accordingly. I agree that if the extra range isn't needed, the 70 is more than adequate. That's what I was planning to order originally, but since I plan to take occasional road trips, I decided to get the 85 instead; without the road trips, the 70 would have been fine.

Bighorn | September 27, 2015

The weight of the battery is more than just modules so your math will underestimate the weight of a 70 simply dividing 14 by 16.

NKYTA | September 27, 2015


rxlawdude | September 27, 2015

AFAIK, the motors in the 70D and 85D are identical. Only the battery (with fewer cells and lower voltage) is different.

However, I could very well be incorrect in believing what I read on the Internet. :-)

RedShift | September 27, 2015

Today I was at the Tesla factory and asked the same question: apparently the 70 is the same weight as the erstwhile 60: 4400lbs approx.

Explanation was that the 70 had fewer empty cells than then 60, due to a different and better way of distributing them.

Bighorn | September 27, 2015

Part of the Modi tour?

RedShift | September 27, 2015

Nope. Freeloading on supercharger after a long time.

I got the invite for the Modi thing, but declined owing to many other things keeping me busy.