Commercial vehicles obviously have different price dynamics than a consumer vehicle. For a semi truck that consumes upward of $50,000 in diesel per year it can make sense to have high upfront costs if the operating cost is low. Trucks are already very heavy and could accomodate perhaps 1000kWh of batteries under the frame and under the hood. Two of Tesla's current 416HP traction motors would give class leading power assuming that they could be kept cool. Efficient solar cells covering the top of a 53 foot trailer could produce several kilowatts of power that would add a non-trivial amount of range. Is there a possible business case for a current truck builder to partner with Tesla to develop an all EV semi? Truck stops are the perfect location for super-high powered Superchargers that can supply several hundred KW of power to the battery.