Constellation Energy® Rates, Plans, Code | 888-900-7052

Constellation Energy (formerly StarTex Power) is a major electric company offering Texas electricity rates. Review objective information on Constellation Energy electricity plans and rates below, and use our guides to help you choose the best energy plan.

Compare rates from Constellation on their website with special discounted electricity rates from top electric companies in Texas below.


Compare Constellation Energy Plans to Top Electric Companies

9 Gexa Energy Vetted Guaranteed Plans

Plan NamePlan LengthRate
Gexa Eco Saver Plus 1212 Months11.5 ¢/kWh
Gexa Eco Saver Plus 2424 Months11.5 ¢/kWh
Gexa EV Saver 2424 Months14.9 ¢/kWh
Gexa Energy Saver 2424 Months16.5 ¢/kWh
Gexa Saver Freedom 3636 Months17.7 ¢/kWh
Gexa Eco Saver Lite 1212 Months19.2 ¢/kWh
Gexa Eco Saver Advantage 1212 Months19.6 ¢/kWh
Gexa Eco Saver Premium 1212 Months20.2 ¢/kWh
Gexa Eco Saver Premium 2424 Months20.2 ¢/kWh
  • *Rates as of 02/23/2024 at 07:14 PM. Based on 1000 kWh in Oncor zone. Enter your zip code above for rates in your area.

Call Gexa (855-639-8212)

8 4Change Energy Plans & Rates

Plan NamePlan LengthRate
4Change - Maxx Saver Select 1212 Months11.5 ¢/kWh
4Change - Maxx Saver Select 2424 Months11.5 ¢/kWh
4Change - Cash Money 1212 Months14.1 ¢/kWh
4Change - Charitable Saver 1212 Months14.2 ¢/kWh
4Change - One Rate 2424 Months15.7 ¢/kWh
4Change - One Rate 1212 Months16.3 ¢/kWh
4Change - Power Maxx Saver 1212 Months17.4 ¢/kWh
4Change - Power Maxx Saver 2424 Months18.1 ¢/kWh
  • *Rates as of 02/23/2024 at 07:14 PM. Based on 1000 kWh in Oncor zone. Enter your zip code above for rates in your area.

Call 4Change (888-366-7291)

8 Frontier Energy Plans & Rates

Plan NamePlan LengthRate
Frontier - Frontier Saver Plus 1212 Months11.5 ¢/kWh
Frontier - Frontier Saver Plus 2424 Months11.5 ¢/kWh
Frontier - Smart Budget 2424 Months15.5 ¢/kWh
Frontier - Smart Budget 3636 Months15.6 ¢/kWh
Frontier - Smart Budget 1212 Months15.8 ¢/kWh
Frontier - Frontier Saver Value 1212 Months19.1 ¢/kWh
Frontier - Frontier Saver Max 1212 Months20.2 ¢/kWh
Frontier - Frontier Saver Max 2424 Months20.2 ¢/kWh
  • *Rates as of 02/23/2024 at 07:14 PM. Based on 1000 kWh in Oncor zone. Enter your zip code above for rates in your area.

Call Frontier (855-782-8379)

6 Reliant Energy Trusted Plans & Rates

Plan NamePlan LengthRate
Reliant - Conservation 2424 Months15.6 ¢/kWh
Reliant - Basic Power 2424 Months15.8 ¢/kWh
Reliant - Basic Power 1212 Months16.2 ¢/kWh
Reliant - Conservation 1212 Months16.6 ¢/kWh
Reliant - Truly Free Weekends 100% Solar 1212 Months17.8 ¢/kWh
Reliant - Truly Free Nights 100% Solar 1212 Months18.2 ¢/kWh
  • *Rates as of 02/23/2024 at 07:14 PM. Based on 1000 kWh in Oncor zone. Enter your zip code above for rates in your area.

Call Reliant (866-735-1218)

Texas energy rates are generally lower than last year even with the higher temperatures reached recently, so make sure to lock in a low rate now. You can review Constellation Energy prices to find the best rate for your needs.

Constellation Energy Promo Code: see if our list of exclusive electric company promo codes features a Constellation Energy promo code this month (also known as a referral code or discount code), which allows you to receive a discounted rate.

Constellation Energy Reviews & Ratings

It’s highly recommended that you check Constellation Energy reviews from Texas citizens before locking in a Constellation energy rate. Here are Constellation reviews and ratings on their pages at Consumer Affairs, Google, and Yelp, which you may find insightful.

At Home Energy Club we gather customer opinions and reviews from independent review sites, the State of Texas Public Utility Commission Complaints Stat, and other review sources.

We use this information combined with our own Home Energy Club/Amazon customer satisfaction survey results to determine a rating score for each energy provider, such as Constellation Energy.

HEC Constellation Energy Rating Score: 4.2/5

Constellation Energy Customer Ratings

Constellation Energy shows fair rating scores for most of the reviewed categories. Constellation received a score of over 4.5 in one of the five reviewed categories.

Constellation Energy Customer Reviews

Visit our Constellation Energy Reviews page to read more Constellation Energy customer reviews.

On review sites, always scroll down past the initial reviews to gain a more unvarnished view of consumer input. Also, note that consumers who post reviews about electric companies tend to have had negative experiences.

To compare Texas electric company reviews side by side, go to our Reviews page.

Constellation Energy Rates & Plans in Texas

Constellation offers Texas electricity plans with a range of energy rates and contract lengths. Review the plan details and Electricity Fact Label for each Constellation rate plan to determine if it fits your home’s usage. For additional support, you can contact Constellation Energy customer service for assistance.

Types of Electricity Plans Offered by Constellation

Constellation Energy electricity plans include fixed rate plans that lock in your energy rate for the term of the contract, variable energy rate plans that have floating rates, so-called free electricity plans that offer energy at no cost on nights and/or weekends, and 100% “green” renewable energy plans.

Discover more about how to get the best green home energy rates for your home residence or business.

Free Electricity and Gadgets

Constellation energy rates that are free for specified days and times of day may cost you more than regular electricity rates due to your home’s usage patterns and the plan’s energy rate during non-free periods. Be certain to carefully read the Electricity Fact Label (EFL) for such plans. Also, our Electricity Fact Label guide for Texas electricity customers will show you how to use the EFL to choose the right plan for your home.

Check our promo codes page for availability of a Constellation Energy promo code. You will also find electricity promo codes for other top electric companies in Texas. Our exclusive promotional codes provide a discount off the rates of electric companies on their websites.

Moving to the Lone Star state? Find info on Texas electric companies in Houston and electric companies in Dallas, as well as other helpful electricity-related information related to those cities, including EV charging stations and available electricity rates and plans.

Beware of Constellation Imposters

If you are performing an online search for Constellation energy plans, you may find it confusing because numerous third party websites that include the name “Constellation” in their domain names and have the Constellation Energy logo in their banners, enroll consumers into what appears to be Constellation plans. To the average consumer, these sites would mistakenly appear to be owned by Constellation, but the fine print in the footer discloses that they are not owned or affiliated with Constellation, so this seems to be a deceptive practice by brokers posing as Constellation. It’s not clear which website Texas electricity customers can securely enter their information into when trying to sign up for Constellation electric rates.

How Constellation Energy Compares to Top Energy Providers

Constellation Energy usually does not have the best electricity rates in Texas and doesn’t attempt to provide the cheapest electricity plans, but they generally have energy rates that are competitive with large light companies in Texas. You can have the comfort of knowing that Constellation is a well established light company, especially in the commercial electricity market. They reportedly acquired StarTex Energy to gain a foothold in the Texas residential market. If you wish to view electricity rates from top residential electric companies in Texas to compare them to Constellation Energy rates (you’ll need to view Constellation’s rates on their site), input your zip code and home size into the box in the upper right corner of this page.

Use your Power to Choose in Texas to Help the Planet

As green energy has become more price competitive with fossil-sourced energy, more residents are enrolling in renewable energy plans in Texas to combat climate change. Constellation Energy offers renewable energy plans, but also check the cheapest energy rates for green plans from Gexa Energy, TriEagle Energy, Pulse Power and Lone Star Energy. You have the power to choose Texas energy providers and electricity plans that best match your budget, values and needs.

Top Texas Electric Company Toll-Free Numbers

Champion Energy: 844-856-9388
Cirro Energy: 833-392-9778
Discount Power: 833-556-6491
Gexa Energy: 855-639-8212
Green Mountain Energy: 833-339-0421
Just Energy: 833-871-5317
Lone Star Energy: 888-853-2882
Pulse Power: 833-785-7797
Reliant Energy: 833-339-0416
TriEagle Energy: 888-380-4813


Constellation Energy Customer Service

If you need to reach Constellation customer service, call the Constellation Energy phone number at 888-900-7052. For Texas customers there is no 24/7 service, so you’ll need to call from 7 am to 8 pm CST Monday through Friday, and 8 am to 5 pm CST Saturdays. Constellation Energy customer service does not offer operator assistance on Sundays.

To access your account, go to the Constellation Energy login page. The customer care phone number in case you need help with your Constellation login is 888-900-7052.

Requirements to Start Constellation Energy Service

Call the Constellation phone number 855-461-9824 for requirements to enroll in a Constellation Energy plan. See operator hours in the section above. Constellation may require a deposit depending on your credit score, and be sure to have your identification information. You can also enroll online in less than 10 minutes.

Compare Texas electricity rates vetted to prevent billing surprises

Constellation Energy Bill Pay

If you wish to pay your bill from Constellation online, visit the Constellation Energy Bill Pay page or pay by phone at the Constellation Energy phone number 888-900-7052. See operator hours in the section above.

It’s helpful to visit the Smart Meter Texas website and review your home’s electricity usage periodically to make sure the usage information on your Constellation bill matches your home’s meter usage.

Constellation Renewable Energy Plans

The Constellation Electric Company is not categorized as one of the low rate energy companies in Texas, and their renewable energy rates are generally higher than those of energy providers such as Gexa Energy (which offers a 60-day Happiness Guarantee), TriEagle Energy (sister company to TXU), and Pulse Power and Lone Star Energy (credible discount providers). These alternative providers are considered to be high quality, cheap electric companies. You can find competitive, low renewable energy rates from competitors of Constellation at Home Energy Club.

Sources of Green Energy in Texas

Texas electricity comes from various renewable sources, especially solar energy and wind energy. Solar panels are used to generate solar power, while wind turbines are used in the generation of wind power. Constellation uses renewable energy credits to promote sustainable energy.

For a glimpse at how much CO2 traditional fossil-sourced energy plans emit into the environment, here’s our interesting and educational energy infographic.

Compare Texas electricity rates vetted to prevent billing surprises

Switching, Moving and Constellation Energy Cancellation Fees

We created a very useful Savvy Shopper’s Texas electricity guide that will help you select an energy plan that matches your home and objectives if you are switching and wish to choose from other light companies in Texas.

If you use comparison websites like ours to compare energy plans, it’s useful to note that the Power to Choose Texas government website has had a large number of complaints and negative media stories because of their lack of quality control. The Texas Power to Choose site has been accused of displaying deceptive electricity plans which cause billing surprises. To learn more, perform an online search of stories about “Power to Choose”.

Transferring Your Constellation Energy Plan

You can conveniently have Constellation Energy transfer your energy plan when you move to a different address in a deregulated area of Texas. Give them a call to discuss your change of address at least a month in advance of your move.

Report a Constellation Energy Power Outage

If you experience a Constellation Energy power outage, report it to Constellation, or for faster service, contact the Transmission and Delivery Utility (TDU or TDSP) in your area. In Texas, electric companies like Constellation, referred to as Retail Electricity Providers (REPs), function as marketing and billing companies and do not correct outages. TDUs repair outages and transmit electricity. See our handy Texas power outage phone directory.

If you wish to report a power outage in Texas, please contact your local area TDU:

  • Oncor: 888-313-4747
  • AEP: 866-223-8508
  • Centerpoint Energy: 800-332-7143
  • Texas New Mexico Power (TNMP): 888-866-7456
  • Sharyland Utilities: 800-545-4513

Also find electricity information for Texas cities, including electric companies, TDUs, EV charging stations and more.

About Constellation Energy

Constellation Energy, formerly StarTex Power, is one of the largest electric companies in North America, but is not one of the top brands in relation to residential energy providers in Texas, including Constellation Energy Houston. They offer an assortment of fixed rate energy plans for various term lengths, as well as renewable energy plans, and competitive Constellation Energy prices.

Constellation Energy Business Information

Constellation Energy’s headquarters in Texas are located in:

1001 Louisiana St Suite 2300, Houston, TX 77002, United States

You can reach their corporate headquarters at +1 888-900-7052

If you want to sign up for a plan you can either enroll online or call 888-900-7052.

Top Texas Municipalities Serviced

Deregulated Cities
Fort Worth         
Corpus Christi       

See all deregulated cities in Texas.

Top Constellation Energy Zip Codes Serviced

Enter your zip code for cheap rates in your area


Constellation Energy Frequently Asked Questions

Where to compare Constellation Energy plans, rates, reviews?

You can compare Constellation Energy plans and rates, and read verified customer Constellation reviews and ratings on The comparison site uses its bargaining power with electric companies in Texas to provide you with special low discount rates. You’ll find in-depth information on over 40 electric companies from objective sources like the State of Texas and Google Reviews, and Home Energy Club/Amazon surveys. Home Energy Club vets each electricity plan to help you avoid bill surprises, and there’s never a membership fee.

Where can I pay my Constellation Energy bill?

There are quick and easy Constellation Energy bill pay options for Texas customers, such as the ones below, and you can find in-depth information about Constellation at

  • Online bill pay using your Constellation Energy login
  • Automatic Constellation Energy bill pay for recurring payments
  • Phone bill payment using the 24/7 automated system by calling Constellation phone number 833-221-6654
  • Check bill pay mailed to the company postal address at: Constellation Energy, P.O. Box 5471, Carol Stream, IL 60197-5471

How to find Constellation Energy promo code for discount rates?

Go to the Constellation Energy profile page on to determine if they are featuring promo codes which deliver instant rate discounts this month. If there are no Constellation promotional codes, you’ll find promo codes from many other major electric companies in Texas.

Is Constellation a good energy company?

To determine whether Constellation Energy is a good company, we suggest that you read verified Constellation reviews and ratings from reputable independent sources on

If you search for Google reviews, you’ll find that Constellation has only a 2-star rating out of 5 stars, and on Yelp, Constellation has a 1-star rating out of 5 stars.

You’ll see reviews, ratings and complaints statistics about Constellation and over 40 other electric companies at Home Energy Club.

What does Constellation Energy do?

Constellation Energy is an energy company that provides natural gas, electricity, and renewable energy to Texas customers. Constellation serves integrated energy solutions and management products across the United States. The company changed the name of its StarTex Energy residential electricity brand to its Constellation brand.

Constellation Energy was founded in 1999. Its headquarters are in Baltimore, Maryland. Before the acquisition by Exelon, Constellation operated over 35 power plants in the country.

Does Constellation Energy have a cancellation fee?

A Constellation Energy cancellation fee may apply if you terminate your fixed-rate electricity plan before the contract end date. If your plan is a variable-priced, month-to-month electricity plan, you should not have to pay a penalty. Check the Electricity Facts Label of any plan you’re considering to determine the amount of its early termination fee at

When moving to a location where Constellation does not provide service, you are eligible to cancel without a penalty. Speak with a Constellation Energy operator at 888-900-7052 to cancel your service.

Does Constellation Energy have an app?

The company offers an energy-saving app called Constellation Connect. You can download and connect the Constellation app to a variety of smart home devices like Google Home or Amazon Alexa. You can manage your smart devices with voice control as the app interacts with lighting and security systems to improve your home’s energy efficiency.

How to contact Constellation Energy?

Contact Constellation Energy’s customer service operators at 888-900-7052 during business hours, or connect with the Live Chat option on the Constellation website. Contact Constellation through Facebook and Twitter, Monday through Friday, from 9 am to 4 pm. For full information about Constellation and to compare their energy plans to those of top electric companies in Texas, visit the Constellation profile page at Home Energy Club Discount Rates.

Who bought Constellation Energy?

Exelon Corp., a Fortune 100 energy company, bought Constellation Energy in 2012. Exelon has 10 million electricity customers in the United States. Exelon is also one of the largest nuclear power plant operators in the country.

Does Constellation Energy require a deposit?

Some Constellation Energy plans require you to pay a deposit. Based on your credit score and your payment history, your security deposit may be waived.

If you are looking for Texas energy companies with no deposit, shop for no-deposit and prepaid energy plans on Home Energy Club. Also, you can compare energy rates from Texas electric companies offering free nights and weekends electricity with no deposit requirements.


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