If you move from your existing premise during the contract term, you will NOT be responsible for an early termination / cancellation fee.
Per the law "A contract is limited to service to a customer at a location specified in the contract. If the customer moves from the location, the customer is under no obligation to continue the contract at another location. The REP may require a customer to provide evidence that it is moving. There shall be no early termination fee assessed to the customer as a result of the customer’s relocation if the customer provides a forwarding address and, if required, reasonable evidence that the customer no longer occupies the location specified in the contract."
https://www.puc.texas.gov/agency/rulesnlaws/subrules/electric/25.475/25.475.pdf