Tesla disclosed that “only four percent of customers chose the 40 kWh battery pack, which is not enough to justify production of that version.” But because customers could only order vehicles then in production, at least until Tesla switched its order process at the beginning of 2013, it’s not clear that the vast majority of Model S reservation holders had even been able to register their preference. The 40 kWh version was also never capable of using Superchargers, eliminating one of Tesla’s most critical advantages.
