What is the difference between the different levels of charging? Audi on demand July 27, 2022 15:23 Updated The three main categories of charging options are generally classified as Level 1, Level 2, and Fast Charging. Related articles Will I be charged a “refueling” fee for my e-tron rental if I bring it back at less than 100%? How can I find recharging stations? Can I charge the e-tron anywhere with an outlet? Is Electrify America my only option for DC Fast charging during long-distance trips? Are all public stations, DC Fast Charging stations?