Submitted by golftoday on March 8, 2013
This is not about range, but rather how long the battery will live or battery longevity. A Tesla FAQ states: The Tesla battery is optimized for nightly charging: topping off frequently enhances the longevity of your battery. I'm asking about this because this runs counter to other things I've read. BatteryUniversity.com is devoted to maintenance of lithium ion batteries, and they suggest that the number of discharge cycles affects battery life. I've had a Nissan Leaf for 1.5 years. (My Model S is being delivered March 22 - April 5, and yes, I am very excited :) Nissan engineers have suggested that battery life is enhanced by charging LESS often, and by keeping the charge between 20-80% of capacity. Don't run down to zero. Don't charge to 100%. Obviously these things happen sometimes, but the less often they happen the better. Even with the Leaf's limited range of 75 - 100 miles, I usually charge three times a week. I had assumed that with an 85Kw battery (the Leaf only has 24.4Kw) I would only be charging once a week.
Is the Tesla battery that different? Does the much larger battery react differently? Is this just a religious war between different engineers?