I think you're too caught up in kwh, but all Elon and Tesla care about is range.
Range comes from higher capacity batteries. That's why none of the numerous production electric vehicles that top out at 24 kWh have a range that greatly exceeds 60 miles of use in the real world. Trust that if
Tesla Motors could give you a 200+ mile range with 24 kWh of energy storage, they would.
Whats told is "realistic 200 mile range". I read that as 200mile EPA range. Just about the same as MS60 has today.
Precisely. The problem is that
Tesla Motors originally expected the
Tesla Model S 60 to be rated at around 230 miles of range by the
EPA. The
EPA changed their testing method to a 5-cycle instead of a 2-cycle process, just in time to test the
Tesla Model S variants -- which had been engineered to the old 2-cycle process. As a result of that change, all of them were rated at about 90% of the range that
Tesla Motors had expected.
40 kWh ⇒ 160 instead of 180
60 kWh ⇒ 208 instead of 230
85 kWh ⇒ 265 instead of 300
With a 20% smaller/lighter car "everyone" has figured out it has to be 48,5kWh. What they forget is that Model ☰ will have a new battery chemistry with less weight pr. Wh. Therefore I guess it will be about 45kWh for ~210 miles EPA range. But it can be anything from 42kWh to 50kWh. Any more and they will miss the price point.
Because of the fiasco that took place the last time, I don't think
Tesla Motors can risk trusting the
EPA not to screw them again. If
Tesla engineers a car that they know will just barely scrape past the 200 mile barrier, say... 220 miles or so... then the EPA only gives them credit for only 90% of what the car can achieve again, that puts them at only 198 miles of range. Your example of shooting for 210 miles might yield only 189 from the
EPA.
Tesla would be raked over the coals if the car doesn't get a 200+ mile range rating from an independent source, such as the
EPA.
I believe that
Tesla Motors will be able to create a 60 kWh battery pack for the
Tesla Model ☰ that uses only 60% of the battery cells that were in the original
Tesla Model S 60. That gets you well beyond the 20% reduction in weight. With the Gigafactory supplying batteries, the price per cell goes down by 30-33% each. So you effectively will have 60 kWh of storage for only 40% of their cost in 2012. You get to use all the storage in a smaller space, at a lower cost, without having to resort to having a wimpy car.
Naturally they will have more then one battery pack for the Model ☰, but what range will they target?
As I said above, range comes from kWh capacity. The more you have, the further you can go. I expect that to work out like this as EPA ratings:
250 ⇒ Model ☰ 60
318 ⇒ Model ☰ 85
505 ⇒ Model ☰ 135
I especially like the 60 kWh version as being the base model, because when you consider who might be buying it... Since the
'average' daily commute is less than 40 miles round trip per day... Someone who started with a full charge and drove to work and back five days a week would still have ~50+ miles of range left. Still enough to go to a friend's house for the weekend and bum a free charge overnight... Or make it to a Supercharger on the outskirts of town, fill up and hit the asphalt for a road trip. Perfect for anyone who doesn't have garage parking at home or a charging station at work.