As an Exelon company, Constellation Energy is part of one of the biggest — and historically most polluting — corporations in North America. Given Exelon’s vast production energy, ranking on the PERI Toxic 100 list is perhaps not that surprising. The good news is that Exelon is upfront about its room for eco-friendly improvement and make it easy for Constellation customers to go green, too.
No. When you’ve chosen a new deal, your new supplier will handle the switching process. They’ll contact you to let you know what date you’ll be transferred over, and they’ll contact you around the switching date to ask for a meter reading. They’ll pass this on to your old supplier so they can send you a final bill. You don’t need to contact your old supplier, as the new supplier will handle everything for you.
Since you are located in a deregulated area of Texas and in the TXU Electric Delivery service area you do have a choice in your electricity provider. Katy residents and businesses can choose to stay with their Affiliate Retail Electric Provider (TXU Energy), or you can choose one of several competing Katy electricity providers: TXU Energy, Green Mountain Energy, Champion Energy Services, Commerce Energy, and StarTex Power. So make your choice today. Enter your ZIP code above to browse energy supply rates in your area.

To skirt the late summer electricity rate hikes, a little bit of planning can really pay off. Try to avoid signing new long-term electricity contracts in late summer. While it may be impossible to escape signing a new electricity contract if you’re moving during that time, just know that a short-term plan may make more sense until the rates go back down in the fall.  That way you’re not stuck paying a premium rate for an entire year or more.
Usually, fixed-rate renewable-energy plans are among the most expensive options. But in our research, we found Constellation’s green plan rates were comparable to its non-green versions. For example, out of two otherwise identical fixed-rate, 12-month plans from Constellation — “12 Month Fixed Rate 100% Green” and “12 Month Fixed Rate” — it’s the renewable version that currently costs less.
As of April 2014, 16 U.S. states and the District of Columbia have deregulated electricity markets. Along with aforementioned Maryland and Texas, electricity deregulation is current in Connecticut, Delaware, Illinois, Maine, Massachusetts, Michigan, Montana, New Hampshire, New Jersey, New York, Ohio, Oregon, Pennsylvania, and Rhode Island. Seven additional U.S. states began the process of electricity deregulation but have suspended efforts: Arizona, Arkansas, California, Nevada, New Mexico, Virginia, and Wyoming.[5]
Reliant offers a variety of electricity plans at rates that fit your needs and lifestyle. Whether you’re a sports fan or world traveler, you can get rewards and bonuses along with your electricity plan. We run special promotions throughout the year and offer plans that let you save money when you use electricity on the evenings or weekends. If you're looking for an environmentally-conscious option, check out our wind power, solar power and solar sell back plans. 

Of course, choosing a new electricity supplier or natural gas supplier does not mean you are replacing your utility. Your utility will still deliver whatever energy supply you choose, safely and reliably. Since your utility company depends on where you live, you don't have to worry about choosing a utility company. In general, utilities are responsible for maintaining the energy infrastructure. If you experience a power outage or see a downed power line, call your utility company. These are listed in the Utility Companies column below.
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