When the NHTSA receives their "off the line" vehicle for testing, regardless of whether they get a 40, 60, 85, or 85 Perf presumably Tesla wants to do whatever they reasonably can to make sure that the NHTSA considers the results applicable to the other 3 flavors. Such accomodations might include specific weight and front/rear balance requirements.
Truly Electric Spaceship-Like Adventure ~ Signature Model Spaceship
PLEASE NOTE: these musings are the copyrighted intellectual property of the author, and are intended as part of a conversation among the Tesla Motors Clubs membership. My words may not be quoted by any third party outside the Tesla Motors Clubs forums, without my expressed consent. Especially the NYT, which is clearly ethically challenged.
Lets consider they are using less of the same cells then the 85kw Model S
-they don't need to add ballast, I can't think of a reason why any engineer would ever want to handy cap there own work.
-for structural support in crash tests they would have three easy options, still install the empty battery cell boxes seen in the main pack, replace empty battery boxes with light honeycomb, just use bracing.
- each model has lower max speed and lower 0-60 times as you get a smaller pack this is most likely ratio changes in the single speed gear box. They are sacrificing speed for efficiency. Also tesla has only ever mentioned two motors, performance and none performance. So for simplicity each non performance car will likely have the same motors.
-look at the battery warranties, they also go down with the capacity of the pack, this indicates they most be using the same batteries only fewer. And they are going through much larger cycles. With 85kw you aren't cycling the batteries much day to day for an hours drive. But in the 40kw your using the majority of the capacity to travel the same distance.
-the software, chargers, algorithms, are so complex and took so many man hours, there is no way tesla tripled their work to use three different battery types. Gear box ratios would take a fraction of the time to impalment.
Last edited by EcoHeliGuy; 12-10-2012 at 10:01 PM. Reason: Spelling
I know I've seen this several places on these forums but I'm having problems finding this information.
My question is "How many KWHs does it take to fully charge a 60 KWH car?" or another way to ask it "What is the efficiency of the charger?"
I will be charging on a 240 volt 50 AMP NEMA 14-15 outlet. I remember reading that 120 volt charging was not quite as efficient since not as much energy is left over for the car once cooling and other overhead processes are taken into consideration.
60 kWh S: Range = 208 miles at 35 kWh/100 mi = 72.8 kWh
24 kWh LEAF: Range = 73 miles at 34 kWh/100 mi = 24.8 kWh
Calculations above performed using EPA efficiency numbers. The EPA ratings are kWh from the wall so includes charging efficiency.
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