Tesla CEO Elon Musk wrote that a Tesla Semi completed a 500 mile drive weighing in at 81,000 lbs, which is almost 100% of its Gross Combination Weight (GCW).
— Read on insideevs.com/news/623752/fully-loaded-tesla-semi-completed-500mile-drive/

but where do you find 1400kW top up chargers out on the highway? Or where in big city? Maybe you just follow transmission lines to hot wire into pot line at nearest aluminium smelter