One of the most common sticking points for electricity customers is what, exactly, the difference is between an electricity provider (also called REP, CRES, or electric supplier) and an electric utility (also called a TDSP, TDU, or EDU). They’re both vital to the success of electricity deregulation, but they play very different roles. Understanding how they fit together can make a big difference in your overall confidence as an electricity customer trying to shop for the best electricity plan.
Twenty-nine states have deregulated electricity, natural gas or both. That allows you to shop for the supply portion of your bill from alternative providers who may offer rates lower than the default supplier – usually a utility. Delivery services and billing will remain the responsibility of the local utility as they own the power lines and wires that keep the lights on.
According to a 2016 J.D. Power national report, switching from the utility company to an REP is not as attractive as it once was. Deregulated markets aim to drive down costs and encourage innovation but has really only succeeded in the second — the price gap between utility rates and retail rates has actually been closing. But deregulation has been successful in championing green energy and improving customer service. This improvement shows up in some impressively high J.D. Power ratings.
Generally, the generation of electricity is unrelated to anything on your bill. Power plant companies generate electricity and sell it to utilities as well as retail electricity providers in deregulated areas. The electricity is then resold to you, the customer. Transmission and distribution is taken care of and charged to you by your utility, regardless of what company supplies the electricity. These charges are separate from the supply portion of your bill.
Consumers in Houston, Dallas, Fort Worth and Corpus Christi were promised bargains on electricity when the Texas Legislature deregulated the electricity market. But 16 years later they're still paying more for electricity than their counterparts in cities Texas lawmakers exempted from deregulation such as Austin and San Antonio, according to the Texas Coalition for Affordable Power which analyzed federal electricity pricing data.
Retailers Include: AEP Energy , APG&E Energy Solutions , Calpine Energy Solutions , Constellations NewEnergy, INC , Crius Energy , Direct Energy Services LLC , Dynegy , ENGIE Resources , Entrust Energy , IGS Energy , Just Energy , Liberty Power , Next Era Energy Services , Nordic Energy Services, LLC , NRG Energy INC , Source Energy , Spark Energy , Starion Energy , Stream Energy , Talen Energy , TransCanada Power Marketing LTD. 
That means that customers in Houston paid an average of $5,500 more for electricity over a 14-year time span beginning in 2002, according to the group that buys electricity on behalf of municipal governments in Texas. The calculation, which uses data from the U.S. Energy Information Administration, assumes monthly electricity use of 1,300 kilowatt hours.
Ameren Illinois is the only company that delivers electricity to Champaign residents (Ameren Illinois, 800-755-5000). However, there are many retail electric suppliers who supply electricity. Residents may choose to receive their supply from Ameren or another provider, residents are encouraged to research before choosing a supplier. Visit this page on the Ameren site for more details.
Of FirstEnergy’s two plans, “Residential Fixed Price” (July 2019) and “Residential Fixed Price” (July 2020), the longer term contract comes with a reduced rate, per usual. If you’re hesitant to enter into a lengthy commitment because you’re planning to move within the next year or two, it’s nice to know that FirstEnergy builds a moving loophole into its cancellation policy. If you’re changing addresses and FirstEnergy does not service your new neighborhood, it doesn’t levy a cancellation fee. Opting out for any other reason comes with a $50 fee, cheaper than any other flat-rate cancellation fee we’ve seen. In fact, it might still be cheaper to go with the longer contract if you aren’t sure when you’ll move, or whether you can take your FirstEnergy service with you.
Just Energy’s style of Contract Summaries doesn’t make it easy to parse out exact details, leaving blank spaces where rate and term length info should appear. On the third page, you’ll find densely typed Terms and Conditions that confusingly conflate Just Energy’s natural gas and electricity plans. It’s heavy on the legalese but light on the data that you’ll want to nail down before making a purchasing decision, like rate. We couldn’t get a clear price or explanation on what happens after commitment without enrolling in a plan.