NRG Energy, Inc. Adds 40 Megawatts of Capacity to Cos Cob Generating Station

Business Wire, June 26, 2008

--Additional emergency power generation in Fairfield County--

PRINCETON, N.J. -- NRG Energy, Inc. (NYSE: NRG) has completed major improvements at its Cos Cob generating station in Fairfield County, Conn. that have added 40 megawatts (MW) of clean reliable power to the site. The plant is now capable of providing power to more than 80,000 homes during high electricity use periods.

"Today marks an important milestone in our efforts to help keep power flowing, especially during the summer months when energy demand is at its peak," said John Ragan, NRG's Regional President, Northeast, prior to today's ribbon cutting ceremony at the Cos Cob generating station. "This project is part of NRG's commitment to Connecticut and to providing reliable and environmentally responsible energy to the region."

NRG funded and developed this project that added two new gas turbine units--between the existing three units--bringing total output to 100 MW without increasing the size of the site's footprint. During the three-month construction period, NRG also added new sound-resistant housings to reduce the plant's overall noise level, and landscaping to enhance the site's visual appeal.

All five units were retrofitted to use water injection technology, resulting in a 50% net station reduction in nitrogen oxide emissions and a 97% reduction in sulfur emissions by using ultra low-sulfur distillate fuel. These improvements are an integral part of the State's effort to meet the Environmental Protection Agency's ozone standard.

About NRG

A Fortune 500 company, NRG Energy, Inc. owns and operates a diverse portfolio of power generating facilities, primarily in Texas and the Northeast, South Central and West regions of the United States. In Connecticut, NRG owns facilities in Cos Cob, Middletown, Uncasville and Norwalk that are capable of producing 1,800 MW of electricity. NRG is a member of USCAP, a diverse group of business and environmental organizations calling for mandatory legislation to reduce greenhouse gas emissions. NRG is also a founding member of "3C--Combat Climate Change," a group that calls on the global business community to lead in designing the road map to a low carbon society.

More information on NRG is available at www.nrgenergy.com

Safe Harbor Disclosure

This news release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Such forward-looking statements are subject to certain risks, uncertainties and assumptions and typically can be identified by the use of words such as "will," "expect," "estimate," "anticipate," "forecast," "plan," "believe" and similar terms. Although the Company believes that its expectations are reasonable, it can give no assurance that these expectations will prove to have been correct, and actual results may vary materially. Factors that could cause actual results to differ materially from those contemplated above include, among others, general economic conditions, hazards customary in the power industry, weather conditions, competition in wholesale power markets, the volatility of energy and fuel prices, failure of customers to perform under contracts, changes in the wholesale power markets, changes in government regulation of markets and of environmental emissions, unanticipated outages at our generation facilities, adverse results in current and future litigation, and the inability to implement value enhancing improvements to plant operations and companywide processes.

The Company undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. The foregoing review of factors that could cause the Company's actual results to differ materially from those contemplated in the forward-looking statements included in this news release should be considered in connection with information regarding risks and uncertainties that may affect the Company's future results included in the Company's filings with the Securities and Exchange Commission ("SEC") at www.sec.gov.