Musk's tweet said: "As of Monday, Tesla will no longer take orders for the 75 kWh version of the Model S & X. If you would like this version, please order on Sunday at Tesla.com," with Monday referring to January 13, 2019. This is a big problem because the cheaper versions of the Model S and X are much more expensive than the 75 kWh models. The S 100D twin engine model and a 100 kWh battery costs $ 94,000, $ 18,000 more than the 75D. The X model is even $ 97,000, $ 15,000 more than the 75D function.