You can switch power supply providers to find more agreeable terms, snag a better rate or get green electricity. If you have a month-to-month plan for your power supply, switch at the end of any billing month. If you are locked into a longer contract and want to exit early, you may want to investigate what fees may be assessed if you switch. Power supply will be the same when you switch power providers, so you don't have to worry about sub-standard electricity supply.
In this free market competing electricity retailers buy electricity wholesale from private power generators to sell at retail to around 85% of Texas residents. The partnership between generators and retailers is governed by the Electric Reliability Council of Texas, or ERCOT, which attempts to balance the power grid’s electricity supply and demand by purchasing small amounts of electricity at 15-minute intervals throughout the day.