Exhibit 99.1

NRG Energy, Inc. Reports Second Quarter Results; Completed First NRG Yield Drop Down and Announces Formation of NRG Home and NRG Renew

Second Quarter 2014 Financial Highlights

·                  $671 million of Adjusted EBITDA; with $389 million from wholesale, $173 million from retail and $109 million from NRG Yield

·                  $3,010 million of total liquidity

Year-to-date 2014 Financial Highlights

·                  $1,487 million of Adjusted EBITDA; with $1,005 million from wholesale, $281 million from retail and $201 million from NRG Yield

·                  $286 million of Free Cash Flow (FCF) before growth investments;

2014 Financial Guidance

·                  Reaffirming full year 2014 Guidance as follows:

·                  Adjusted EBITDA of $3,200-$3,400 million

·                  FCF before Growth investments of $1,200-$1,400 million

Business and Operational Highlights

·                  Completed the first drop-down transaction with NRG Yield on June 30, 2014 for total cash consideration of $357 million

·                  Intending to offer additional assets representing, on an annual basis, $120 million of Adjusted EBITDA and $35 million in CAFD to NYLD during 3rd quarter

·                  Achieved key milestone with the formation of a 50/50 joint venture with JX Nippon Oil & Gas Exploration Corporation (JX Nippon), and debt financing with Japan Bank for International Cooperation (JBIC) and Mizuho Bank, Ltd., to build and operate the world’s largest post-combustion carbon capture facility on an existing coal plant for use in enhanced oil recovery

·                  Following successful debt and equity offerings, NRG Yield remains on track to close the acquisition of North America’s largest wind farm, the 947 MW Alta Wind facility located in Tehachapi, California, for $870 million in the third quarter

·                  Announcing optimized environmental compliance plan for Midwest Generation

·                  Grew retail customer count by 35,000 across both Texas and the Northeast in addition to the acquisition of 500,000 Dominion retail customers where we are achieving better than expected earnings and customer retention rate

·                  Announcing the reorganization of NRG’s retail, residential solar and home product and services business into NRG Home and its wind, large scale solar and renewables driven microgrid business into NRG Renew

PRINCETON, NJ; August 7, 2014 — NRG Energy, Inc. (NYSE: NRG) today reported second quarter 2014 Adjusted EBITDA of $671 million with Wholesale contributing $389 million, Retail contributing $173 million and NRG Yield contributing $109 million. Year-to-date adjusted cash flow from operations totaled $564 million. Net loss for the first six months of 2014 was ($153) million, or ($0.48) per diluted common share compared to net loss of ($208) million, or ($0.66) per diluted common share for the first six months of 2013.

“The company’s core wholesale and retail business continue to perform strongly, taking advantage of whatever opportunities have presented themselves in their respective commodity markets,” said David Crane, NRG’s President and Chief Executive Officer. “The formation of NRG Home and NRG Renew will enable NRG to take full advantage of, and realize enhanced value from, the burgeoning growth opportunities that we see arising out of the clean energy sector.”

Segment Results

Table 1: Adjusted EBITDA

(1)         In accordance with GAAP, 2014 and 2013 results restated to include full impact of the assets in the ROFO drop down transaction which closed on June 30, 2014

(2)         Detailed adjustments by region are shown in Appendix A

Table 2: Net (Loss)/ Income

Retail: Second Quarter Adjusted EBITDA was $173 million; $33 million higher than in second quarter 2013 primarily driven by improved operating efficiencies, a continued advancement in customer count, and a focus on maintaining unit margins, partially offset by lower C&I volumes and unfavorable supply costs.

Wholesale

Gulf Coast: Second Quarter Adjusted EBITDA was $88 million; $52 million lower than in second quarter 2013. Gross margin declined by $32 million due to lower generation in ERCOT driven by milder weather and lower prices, partially offset by gains in South Central/MISO due to higher energy prices. The balance of the decline was due to timing of outages.

East: Second Quarter Adjusted EBITDA was $156 million; $12 million lower than in second quarter 2013 primarily driven by maintenance costs at certain Midwest Gen assets, partially offset by higher generation in PJM’s Maryland coal assets and higher capacity pricing in New York.

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West: Second Quarter Adjusted EBITDA was $66 million; $14 million higher than in second quarter 2013. Increases were primarily driven by the addition of the EME gas fleet, partially offset by reductions in capacity revenues from expired toll contracts at Coolwater plant and closing of Contra Costa plant in third quarter 2013.

NRG Yield: Second Quarter Adjusted EBITDA was $109 million; $44 million higher than in second quarter 2013. The performance was the result of new assets achieving commercial operations as well as higher sales volumes in the Thermal business.

Renewables: Second Quarter Adjusted EBITDA was $97 million; $69 million higher than in second quarter 2013. This change is primarily driven by the addition of the EME Wind Portfolio, as well as Ivanpah and CVSR plants which achieved commercial operations in fourth quarter 2013.

Liquidity and Capital Resources

Table 3: Corporate Liquidity

(1) Represents total cash proceeds from NRG Yield equity and debt issuances above expected funding requirements for Alta Wind transaction (expected to close 3rd Quarter 2014)

(2) Included $1,599 million used to fund the acquisition of EME on April 1, 2014

Total liquidity as of June 30, 2014, was $3,010 million, a decrease of $685 million from December 31, 2013, largely as a result of the cash requirements for the EME acquisition. The increase of $70 million in available credit facilities was more than offset by the decrease in cash of $755 million, consisting of the following:

·                  $2,581 million of cash outflows through June 2014, consisting of:

·                  $1,868 million for acquisitions and growth projects, net, including $1,599 million net cash used to acquire EME on April 1, 2014;

·                  $297 million of collateral;

·                  $250 million of maintenance and environmental capital expenditures, net;

·                  $91 million common and preferred stock dividends; and

·                  $75 million of merger and integration expenses.

·                  Partially offset by $1,826 million of cash inflows through June 2014, consisting of:

·                  $1,148 million of net financing activities consisting of: $2,100 million senior note debt proceeds; $337 million NRG Yield convertible notes issuance, net of fees; partially offset by $1,289 million debt payments* (excluding cash grant debt repayments which are included with growth projects);

·                  $564 million of adjusted cash flow from operations;

·                  $77 million of net proceeds from sale of assets; and

·                  $37 million of other net investing and financing activities.

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*Excludes remaining redemption of $223 million of 2019 senior notes for which NRG issued a call notice on August 4, 2014

Drop-Down of Assets to NRG Yield

On June 30, 2014, NRG Energy, Inc. completed the previously announced, first drop-down of assets to NRG Yield, Inc. for total cash consideration of $357 million, representing a base purchase price of $349 million and $8 million of working capital adjustments, plus the assumption of $612 million in project debt, and consisting of the following assets (pursuant to the Right of First Offer Agreement with NRG Yield):

·                  TA High Desert — 20 MW solar facility located in Los Angeles County, CA

·                  RE Kansas South — 20 MW solar facility located in Kings County, CA

·                  El Segundo Energy Center — 550 MW fast-start, gas-fired facility located in Los Angeles County, CA

The cash proceeds of $357 million from these drop-downs represent a 1.6X return on cash equity invested in the projects and an increase in capital available for allocation at NRG Energy, Inc.

During the third quarter, NRG Energy, Inc. intends to offer for drop-down a second set of assets to NRG Yield, Inc. representing, on an annual basis, approximately $120 million of Adjusted EBITDA and $35 million of CAFD. The assets include:

·                  Walnut Creek — 500 MW natural gas facility located in City of Industry, CA

·                  Tapestry — three wind facilities totaling 204 MW: including Buffalo Bear 19 MW in Oklahoma, Taloga 130 MW in Oklahoma, and Pinnacle 55 MW in Pennsylvania

·                  Laredo Ridge — 81 MW wind facility located in Petersburg, NE

Optimized Environmental Plan for Midwest Generation

NRG is announcing its environmental compliance plan for Midwest Generation which was acquired as part of the Edison Mission transaction that closed on April 1, 2014. As part of the plan, NRG will be investing approximately $545 million(1) which will encompass converting the 1,326 MW Joliet facility to natural gas, installing emissions control technology at both the 1,538 MW Powerton and Waukegan facilities, and retiring Will County Unit 3. The effect of the overall investment will be to reduce overall carbon dioxide emissions by at least 16 million tons per year, and lower both SO2 and NOx emissions by 90% and 65%, respectively.

Growth Initiatives and Strategic Developments

NRG continued to enhance its competitiveness and strategic positioning through a wide range of growth and reorganization initiatives, including:

Acquisition of Alta Wind: NRG Yield is on track to close in the third quarter the acquisition of the largest wind farm in North America, 947 MW Alta Wind facility located in Tehachapi, California, for $870 million, plus the assumption of $1.6 billion of non-recourse project financings and subject to customary working capital adjustments. NRG Yield plans to fund the purchase price through proceeds from the recently completed $630 million common stock equity offering, net of fees, and $492 million bond issuance, net of fees. The transaction is expected to increase both the annual run-rate EBITDA by approximately $220 million and Cash Available for Distribution by approximately $70 million (before debt service associated with acquisition financing) by 2016. The facility is contracted with Southern California Edison under long-term PPAs with an average 21 years of remaining contract life.

(1)  Excludes Interest During Construction

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Petra Nova Carbon Capture Project: On July 3, 2014, NRG Energy, Inc., through its wholly owned subsidiary Petra Nova Holdings LLC, formed a 50/50 joint venture with JX Nippon, to build and operate the Petra Nova Carbon Capture Project. Using proven technology, the Project will be a commercial-scale carbon capture system that captures 90% of the carbon dioxide (CO2) from an approximately 240 MW flue gas stream from the 610 MW Unit 8 at the WA Parish power plant in Fort Bend County, southwest of Houston. The overall cost of the project, including costs already incurred, is anticipated to be approximately $1 billion to be funded by:

·                  Equity contributions of approximately $300 million each from both NRG and JX Nippon, of which NRG has already contributed $76 million, net of $76 million reimbursement from JX Nippon;

·                  Debt of $250 million provided by JBIC and Mizuho Bank, Ltd., backed by Nippon Export and Investment Insurance (NEXI), which closed on July 14, 2014 and full notice to proceed issued on July 15, 2014; and

·                  Up to $167 million from the DOE CCPI grant of which approximately $7 million has already been received from the grant in the initial design and engineering phase.

The Company has begun construction on the Project and when complete, the Project is expected to be the world’s largest post-combustion carbon capture facility on an existing coal plant. The Project is expected to be complete by the end of 2016.

Reorganizing to Capture High Growth Opportunities: Over the balance of the year, NRG will be implementing a reorganization aimed at focusing the Company more directly on the high growth segments of the industry and capitalizing on the strengths NRG brings to those areas of the business. NRG, or the NRG Group of Companies, will consist of three main business lines: “NRG Business”- which will consist of our conventional wholesale generation portfolio and our fast growing B2B segment that includes reliability services, onsite generation and our thermal operations and development; “NRG Home”- which is intended to realize the obvious synergies between our nearly 3 million retail customers, our growing residential solar business and other home energy products and services; and “NRG Renew”- the largest solar and third largest renewable company in the United States. The NRG group of companies will also include two special purpose companies encompassing Petra Nova and our national eVgo electric car charging network, respectively, and, of course, “NRG Yield” which is intended to enable and competitively enhance from a cost of capital perspective the contracted assets of all of the NRG companies in the Group.

Outlook for 2014

The Company is reaffirming guidance for fiscal year 2014 with respect to both Adjusted EBITDA and FCF before Growth investments and assumes, in each case, normalized weather for the remainder of 2014.

Table 4: 2014 Adjusted EBITDA and FCF before Growth investments Guidance

(1) Includes debt extinguishment costs associated with refinancing’s of $70 million and $73 million for August 7, 2014 and May 6, 2014 Guidance, respectively

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Notes - subtotals and totals are rounded

2014 Dividend Program

On July 18, 2014, NRG declared a quarterly dividend on the company’s common stock of $0.14 per share, payable August 15, 2014, to stockholders of record as of August 1, 2014.

The Company’s common stock dividend is subject to available capital, market conditions and compliance with associated laws and regulations.

Earnings Conference Call

On August 7, 2014, NRG will host a conference call at 9:00 am Eastern to discuss these results. Investors, the news media and others may access the live webcast of the conference call and accompanying presentation materials by logging on to NRG’s website at http://www.nrg.com and clicking on “Presentations and Webcasts” under the “Investors” section at the bottom of the home page. The webcast will be archived on the site for those unable to listen in real time.

About NRG

NRG is leading a customer-driven change in the U.S. energy industry by delivering cleaner and smarter energy choices, while building on the strength of the nation’s largest and most diverse competitive power portfolio. A Fortune 250 company, we create value through reliable and efficient conventional generation while driving innovation in solar and renewable power, electric vehicle ecosystems, carbon capture technology and customer-centric energy solutions. Our retail electricity providers serve almost 3 million residential and commercial customers throughout the country. More information is available at www.nrgenergy.com. Connect with NRG Energy on Facebook and follow us on Twitter @nrgenergy.

Safe Harbor Disclosure

In addition to historical information, the information presented in this communication includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Exchange Act. These statements involve estimates, expectations, projections, goals, assumptions, known and unknown risks and uncertainties and can typically be identified by terminology such as “may,” “should,” “could,” “objective,” “projection,” “forecast,” “goal,” “guidance,” “outlook,” “expect,” “intend,” “seek,” “plan,” “think,” “anticipate,” “estimate,” “predict,” “target,” “potential” or “continue” or the negative of these terms or other comparable terminology. Such forward-looking statements include, but are not limited to, statements about the Company’s future revenues, income, indebtedness, capital structure, plans, expectations, objectives, projected financial performance and/or business results and other future events, and views of economic and market conditions.

Although NRG 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, the condition of capital markets generally, our ability to access capital markets, unanticipated outages at our generation facilities, adverse results in current and future litigation, failure to identify or successfully implement acquisitions and repowerings, our ability to implement value enhancing improvements to plant operations and companywide processes, our ability to obtain federal loan guarantees, the inability to maintain or create successful partnering relationships, our ability to operate our businesses efficiently including NRG Yield, our ability to retain retail customers, our ability to realize value through our commercial operations strategy and the creation of NRG Yield, the ability to successfully integrate the businesses of acquired companies, the ability to realize anticipated benefits of acquisitions (including expected cost savings and other synergies) or the risk that anticipated benefits may take longer to realize than expected, and our ability to pay dividends and initiate share repurchases under our Capital Allocation Plan, which may be made from time to time subject to market conditions and other

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factors, including as permitted by United States securities laws. Furthermore, any common stock dividend is subject to available capital and market conditions.

NRG undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law. The adjusted EBITDA and free cash flow guidance are estimates as of August 7, 2014. These estimates are based on assumptions believed to be reasonable as of that date. NRG disclaims any current intention to update such guidance, except as required by law. The foregoing review of factors that could cause NRG’s actual results to differ materially from those contemplated in the forward-looking statements included in this Earnings Presentation should be considered in connection with information regarding risks and uncertainties that may affect NRG’s future results included in NRG’s filings with the Securities and Exchange Commission at www.sec.gov.

Contacts:

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NRG ENERGY, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

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NRG ENERGY, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS)/INCOME

(Unaudited)

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NRG ENERGY, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

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NRG ENERGY, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

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Appendix Table A-1: Second Quarter 2014 Regional Adjusted EBITDA Reconciliation

The following table summarizes the calculation of Adjusted EBITDA and provides a reconciliation to net income/ (loss)

Appendix Table A-2: Second Quarter 2013 Regional Adjusted EBITDA Reconciliation

The following table summarizes the calculation of Adjusted EBITDA and provides a reconciliation to net income/ (loss)