Refers to the ability of an energy consumer to select their own energy supplier, or "wheel in" energy from one of two or more different suppliers. When a utility on one region sells energy to a customer in another utility's territory, the energy is said to be wheeled to the customer.

Also refers to the process of delivering energy supplied by one party over a transmission system owned or controlled by another party. The party that controls the transmission system is entitled to charge the customer for the use of the transmission system, but industry regulations usually prevent independent transmission system operators from charging excessive rates for this access.

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