Class 8 trucks have a total limit (truck plus trailer with load) of 80,000 lb. and the tractor itself weighs between 12,000 and 25,000 lb. depending on the model. The difference is what it can carry.

Tesla first announced its plans to enter the Class 8 truck market with electric commercial vehicles in the fall of 2017, with a splashy debut for early validation Semi models at Tesla CEO’s ...