ETC ProLiance Energy – Now a Constellation Company
ETC ProLiance Energy – Now a Constellation Company

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In April 2014 Exelon Corporation acquired ETC ProLiance Energy and it is now part of Exelon subsidiary Constellation.

Constellation is a leading competitive retail supplier of power, natural gas, renewables, and energy management products for businesses and homeowners across the continental United States. Constellation serves more than 100,000 business and public sector customers, including more than two-thirds of the Fortune 100, and more than 1 million residential customers.


Get access to NYMEX pricing data

NYMEX pricing data helps Constellation natural gas customers strategically procure and manage their natural gas supply.

View NYMEX pricing data


Access your natural gas account now on EnerPro®

If you were a ProLiance natural gas supply customer, you can now access your account information through Constellation’s online account service, EnerPro®. EnerPro® allows customers to quickly and securely access their natural gas data and reporting, allowing for more informed buying decisions. To access EnerPro® click here. If you don’t have an EnerPro® username you can get one by contacting your Business Development Manager or sending an email to

Here’s what you get with EnerPro®.

View Invoices and Confirmations
    - Access and Export invoices / Confirmations

View Market Information
    - Daily/Weekly/Monthly Updates

View Usage and Consumption
    - Daily/Monthly/Historic

Access Reporting Suites
    - Forward Position Reports
    - Commodity Summary

Other Capabilities
    - Set up email alerts for invoices, Market Updates, OFO occurrences
    - Update Contact information


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These materials are provided by Constellation NewEnergy, Inc., Constellation Energy Power Choice, LLC, Constellation Energy Gas Choice, LLC, Constellation Energy Services, Inc., Constellation Energy Services – Natural Gas, LLC, or BGE Home Products & Services, LLC (d/b/a BGE Home, Constellation Electric and Constellation Home in Maryland and d/b/a Constellation Home in Pennsylvania and Texas), each a subsidiary of Exelon Corporation. Exelon Corporation also owns Baltimore Gas and Electric Company (BGE), ComEd and PECO energy companies. BGE Home Products & Services, LLC, is not the same company as BGE, the regulated utility. The prices of Constellation are not regulated by any state Public Utility Commission. You do not have to buy Constellation electricity, natural gas or any other products to receive the same quality regulated service from your local utility. Brand names and product names are trademarks or service marks of their respective holders. All rights reserved. Errors and omissions excepted.

Electricity or Gas Supplier License #s: CT DPUC Docket No.99-11-14 07-03-08, 06-02-17; GA PSC License Docket #: 22253, GM-33; IL #s 11-0394, 10-0540, 02-0489; 10-0129, 07-0279, MD License #s IR-228, IR-1853, IR-311, IR-327, IR-500; MA License #CS-045; MI Case #U-14066, U-13660; NJ License #ESL-0016, ESL-0066; GSL-0074; OH #s 00-003E(7); 02-021G(6); PA#s A-125050, A-110036, A-110186; Washington D.C. Supplier License Docket EA01-5, EA-06-5-4, #GA-2012-12, GA-11-5