Which pricing model is LEAST commonly used by major electric vehicle fast charging networks like Tesla Supercharger, Electrify America, and EVgo?

In the rapidly evolving transportation industry, electric vehicle charging infrastructure has developed various pricing strategies to monetize services. These models balance consumer accessibility with business sustainability. This trivia tests your knowledge of how EV charging networks price their fast charging services - a critical component affecting EV adoption rates and transportation electrification.

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Per kWh (kilowatt-hour) billing based on electricity delivered
Time-based billing (per minute connected to charger)
Subscription models with monthly fees plus discounted rates
Distance-based billing (charging cost calculated by miles added)