The Gross Vehicle Weight rules in most states are 80,000 pounds.
The GVW of an empty truck and trailer is about 30,000 pounds.
That allows for 50,000 pounds of cargo for a diesel powered truck.
If a battery pack for a semi truck is 25,000 pounds, then the cargo is reduced to 25,000 pounds for an electric powered truck.
The economics are not looking good.
You are not thinking about the polar bears feelings.
The Tesla semi fleet is hauling potato chips for Frito Lay.
Next comes packing peanuts and helium balloons....