Why is charging an electric semi harder than charging your EV?

Tesla Semi Megachargers can draw about 1.2 megawatts—roughly ten times a fast passenger-car charger—so grid capacity, site design, and depot economics become the hard part.

A Tesla Semi Megacharger can draw about 1.2 megawatts, roughly ten times the power of a fast passenger-car charger. One truck can be manageable; a depot charging many trucks at once may need new utility service, transformers, on-site storage, and careful scheduling. That makes grid availability and site economics as important as the truck's battery.

The practical goal is to fit charging into required driver breaks and overnight depot time without missing routes or triggering punishing demand charges. Fleets should test their own loads, routes, dwell times, and utility costs before scaling.