A desiel semi is much lighter than an Electric Semi is. That's why Tesla Semi hasn't launched yet. They are currently trying to change the regulation for maximum allowances on US Roads from 10k to 14k.
The Delta-V on an electric vehicle has the problem that the battery scales more proportionately to weight and range than a desiel equivelent. Desiel gas has a tremendous amount of energy stored so compactly that is impossible to match with electric batterys.