Taking the 2012 numbers you have at your link, the 85KW pack and 600kg, that is 6200 lb to get to 400kwh. The 2015 number on wikipedia is 540kg per 85kwh pack a

Taking the 2012 numbers you have at your link, the 85KW pack and 600kg, that is 6200 lb to get to 400kwh. The 2015 number on wikipedia is 540kg per 85kwh pack and the model 3 pack is supposed to be 30% more energy dense[0]. The 2015 number gives 5600lbs so I don't think at least 6000lbs is accurate, even the 2012 number is just slightly over. All else equal you can charge batteries based on a % of their total capacity. Current superchargers can do about 2%/min for a model S in the 0-80% charge range but can't deliver the requisite power for a 400kwh pack. But I also haven't seen very many supercharger stations that would be particularly well suited for truck traffic either, so I'd imagine there will be a new charger/stations as well. Sure batteries are no where near competing on absolute range of diesel but I don't think they have to. The question is can you get a days driving in without spending hours and hours charging while keeping the battery capital cost/weight reasonable. You don't need a 1200kwh pack for that because you can take a couple short breaks plus a lunch with supercharging and over double your effective capacity. We'll see what happens but I'd be very surprised if the announcement doesn't include a new super charger and stations unless they design it for short range point to point only. [0]https://electrek.co/2016/11/14/tesla-model-3-battery-energy-density-model-s/ https://electrek.co/2016/11/14/tesla-model-3-battery-energy-...