Ummm I literally just googled
Ummm I literally just googled it and average electricity cost in the US is 14.9 cents a kwh on top of that industrial/commerical rates dont apply here, for the owner to benefit from that they would need to plug their truck into the power they have, doing that would take a week to charge the truck. From ive seen everyone ignores that fact, what gets advertised is supercharger times but this isnt the primary method of charging for most teslas. Its either a wall charger that takes 12-24 hours or a level 2 that is 8-12 hours thats for a normal tesla btw the semi has a capacity 5 times greater than than a model s which those times are quoted for. Teslas solution for the semi is qhen its charged at a supercharger it uses 4 charging heads, which requires a supercharger which charges 4x the normal rate. Even if they spend a ton of money getting them installed wherever the trucks are houses out of that doesn't cover all the trucks needs especially with fluctuations in load and temp. Reality is electric vehicles are a gimmick and will continue to be so until reliable solid state batterys happen. Oh and if you look up the studys the only time the truck is cleaner than a diesel is if at least 60% of its electricity usage is generated by renewable or nuclear energy. There are some places that is possible, mostly along the west coast. The national average is 39% which when factoring in the additional carbon footprint of a electric vehicle(the battery has the same carbon footprint of the entire rest of the vehicle combined, making the entire vehicle generates twice the carbon footprint of a ice vehicle) they will never even break even for most of the country. Finally most of the studys compare to a flat 25% ICE efficiency, with no higher efficiency comparison for a diesel. Ice havnt been that inefficient since the 90s and diesels have been more efficient than gas engines since the 80s. Your average engine nowadays is 35% efficient with the peak being over 40%(Toyota had hit 42% but not sure if they made it to their 45% goal yet) while diesels now average 46% while some research models are nearing 60%. Teslas vehicles are 85% efficient by teslas admission, coal power generation 33% for a total efficiency of 28% for any coal generated electricity and natural gas is on average 42% efficient(some newer combined cycle plants hit 60%) for a total efficiency of 36% for natural gas generated electricity(51% if you happen to use electricity from a combined cycle plant which would be better but there's only a handful of those plants, and again mostly west coast)