Exhibit 99.1

PowerSecure Reports Fourth Quarter Results

Revenues Virtually Double to $39.7 Million, E.P.S. is $0.05, and Backlog Builds to $158 Million

Wake Forest, N.C. – March 8, 2012 – PowerSecure International, Inc. (Nasdaq: POWR) today reported its fourth quarter 2011 results, driven by record revenues of $39.7 million which were virtually double the $21.0 million of revenues reported for the fourth quarter of 2010. The Company’s fourth quarter 2011 diluted earnings per share (“E.P.S.”) were $0.06, which compares favorably to fourth quarter 2010 diluted E.P.S. of $0.02. Fourth quarter 2011 diluted E.P.S. from continuing operations were $0.05, which also compares favorably to fourth quarter 2010 E.P.S. from continuing operations of ($0.01). Discontinued operations include the Company’s Southern Flow unit, which was sold in January 2011, and the Company’s PowerPackages unit, which was exited during the second half of 2011.

The Company’s revenues increased sequentially in every quarter during 2011, driven by strength across its product and service areas, as shown below.

Note: Small differences in Distributed Generation revenues compared to the previous quarter’s earnings release is due to the discontinuance of PowerPackages.

The Company’s record fourth quarter revenues of $39.7 million were driven by a 74% increase in Distributed Generation products and services, a 117% increase in Utility Infrastructure products and services, and a 79% increase in Energy Efficiency products. The Company’s full year revenues also reached a record high $130.0 million, driven by an 18% increase in Distributed Generation products and services, a 94% increase in Utility Infrastructure products and services, and an 8% increase in Energy Efficiency products.

The Company announced that its revenue backlog continued to grow, and stands at $158 million. This includes new business awards announced in January and February, 2012, as well as new orders received during the last several weeks. The Company’s revenue backlog represents revenue expected to be recognized after December 31, 2011, for periods including the first quarter of 2012 onward. This backlog figure compares to the revenue backlog of $149 million announced in the Company’s third quarter earnings release issued on November 3, 2011, which represented revenue expected to be recognized after September 30, 2011.

Sidney Hinton, CEO of PowerSecure, said, “2011 was a transformational year for our Company, and we are in a strong position as we look forward into 2012 and beyond. In 2011 our business reached a new level of maturity and scale, with each of our core product and service areas showing excellent growth, delivering significant revenue, and contributing to our record total revenues of $130 million. In 2011 we expanded relationships with new utility partners, and new large commercial, industrial, and institutional customers. We also broadened our products and services, including new LED lighting products, new PowerBlock distributed generation technology, and an expanded scope of utility infrastructure capabilities and products. The initiatives we invested in during 2010 and 2011 are catalysts for our growth, and give us a strong foundation for reaching our mid-range goal of $300 million in revenues and double-digit operating margins by 2015 – and our 2011 results are tracking nicely with our plan to achieve this goal. Importantly, we are achieving these near-term results while at the same time growing our long-term recurring revenues through investments in PowerSecure-owned Distributed Generation systems. In fact, our Distributed Generation business generated a record $11.3 million of recurring revenues in 2011. In addition, our balance sheet remains very strong, and we enhanced our cash position during 2011 with the completion of the sales of the last of our non-core businesses. Net, net we are very pleased with our progress in 2011 and we are excited about our future.”

The Company’s fourth quarter gross margin as a percentage of revenue was 31.4% compared to 43.3% in the fourth quarter of 2010 and 30.6% in the third quarter of 2011. The lower year-over-year gross margins were driven by the mix of specific projects which were being completed in the fourth quarter of 2011 compared to the fourth quarter of 2010, with the prior year’s fourth quarter containing several projects with very high gross margins. These fourth quarter year-over-year differences in project margins were due to the nature and scope of the specific projects being completed in each respective year, and not a result of a specific systemic margin trend.

The Company achieved its quarterly revenue and profit results while simultaneously building its platform of PowerSecure-owned recurring revenue Distributed Generation projects. This is notable due to the fact that these projects defer current period revenue and profit recognition. During the fourth quarter of 2011, the Company invested $1.7 million in capital to deploy systems under these high-margin, long-term recurring revenue contracts. For the full year 2011, the Company invested $13.2 million of capital for these projects. These investments have led to record levels of Distributed Generation recurring revenue, with 2011 recurring revenues reaching $11.3 million.

Operating expenses for the fourth quarter of 2011 were $11.4 million compared to $9.9 million in the fourth quarter of 2010, and $10.8 million in the third quarter of 2011. The year-over-year increase in operating expenses is due to incremental investments the Company has made to expand and grow each of its Interactive Distributed Generation, Utility Infrastructure, and Energy Efficiency product and service areas. These expenses support new product and customer development, engineering, personnel and equipment, as well as additional sales and marketing activities, and also include increases in depreciation from capital expenditures for PowerSecure-owned distributed generation systems.

The Company provided Non-GAAP Pro forma E.P.S. measures for the fourth quarter of 2010 to show E.P.S. for that period excluding 1) the results of the Company’s non-core WaterSecure investment which was sold in 2011, 2) PowerPackages operations which were exited and discontinued in 2011, and 3) Southern Flow operations which were sold and discontinued in 2011(see the Non-GAAP reconciliation, below). The Company’s fourth quarter 2010 Non-GAAP Pro forma diluted E.P.S. from continuing operations were ($0.04).

The Company’s full year 2011 results included record revenues of $130.0 million which were up 35% compared to full year 2010 revenues. The Company’s full year 2011 diluted earnings per share (“E.P.S.”) were $1.26, which includes the gains on the sales of both the Company’s WaterSecure investment and Southern Flow operations, as well as the results of its discontinued PowerPackages operations, and compares favorably to full year 2010 E.P.S. of $0.19. Full year 2011 Non-GAAP Pro forma E.P.S. of ($0.02) is equal to full year 2010 Non-GAAP Pro forma E.P.S. of ($0.02). Non-GAAP Pro forma E.P.S. for both years includes adjustments to exclude the results of the Company’s non-core WaterSecure investment which was sold in 2011, PowerPackages operations which were exited and discontinued in 2011, and Southern Flow operations which were sold and discontinued in 2011 (see the Non-GAAP reconciliation, below).

The Company’s $158 million revenue backlog and the estimated timing of revenue recognition are outlined below, including “project-based revenues” expected to be recognized as projects are completed, and “recurring revenues” expected to be recognized over the life of the underlying contracts:

Revenue Backlog expected to be recognized after December 31, 2011

Note: Anticipated revenue and estimated primary recognition periods are subject to risks and uncertanities as indicated in the Company’s safe harbor statement, below. Consistent with past practice, these figures are not intended to constitute the Company’s total revenue over the indicated time periods, as the Company has additional, regular on-going revenues. Examples of additional, regular recurring revenues include revenues from the engineering fees, and service revenue, among others. Numbers may not add due to rounding.

Orders in the Company’s revenue backlog are subject to delay, deferral, acceleration, resizing, or cancellation from time to time, and estimates are utilized in the determination of the backlog amounts. Given the irregular sales cycle of customer orders, and especially of large orders, the revenue backlog at any given time is not necessarily an accurate indication of our future revenues.

The Company will host a conference call commencing today at 5:30 p.m. eastern time to discuss its fourth quarter 2011 results, business operations, strategic initiatives and prospects for the future. The conference call will be webcast live and can be accessed from the Investor Relations section of the Company’s website at www.powersecure.com. Participants can also access the call by dialing 888-680-0879 (or 617-213-4856 if dialing internationally), and providing pass code 10103522. If you are unable to participate during the live webcast, a replay of the conference call will be available beginning today at 8:30 p.m. eastern time through midnight on April 5, 2012. To listen to the replay, dial toll-free 888-286-8010 (or 617-801-6888 if dialing internationally), and enter pass code 61501357. In addition, the webcast will be archived on the Company’s website at www.powersecure.com.

About PowerSecure

PowerSecure International, Inc. is a leading provider of Utility and Energy Technologies to electric utilities, and their commercial, institutional, and industrial customers. PowerSecure provides products and services in the areas of Energy Efficiency, Interactive Distributed Generation, and Utility Infrastructure. The Company is a pioneer in developing Interactive Distributed Generation^® systems with sophisticated, proactive smart grid capabilities, including the ability to 1) forecast electricity demand and electronically deploy the systems to deliver more efficient, and environmentally friendly power at peak power times, 2) provide utilities with dedicated electric power generation capacity to utilize for demand response purposes, and 3) provide customers with the most dependable standby power in the industry. PowerSecure also provides utilities with transmission and distribution infrastructure construction and maintenance services, and engineering and regulatory consulting services. The Company’s Energy Efficiency business provides customers with energy efficient lighting technologies that deliver improved quality of light, including its proprietary EfficientLights LED lighting products for grocery, drug, and convenience stores, and its SecureLite^TM and PowerLite^TM street lights for utilities and municipalities. Additional information is available at www.powersecure.com.

This press release contains forward-looking statements within the meaning of and made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are all statements other than statements of historical facts, including but not limited to statements concerning the outlook for the Company’s future revenues, earnings, margins, cash resources and cash flow and other financial and operating information and data; the Company’s future business operations, strategies and prospects; and all other statements concerning the plans, intentions, expectations, projections, hopes, beliefs, objectives, goals and strategies of management, including statements about other future financial and non-financial items, performance or events and about present and future products, services, technologies and businesses; and statements of assumptions underlying the foregoing. Forward-looking statements are not guarantees of future performance or events and are subject to a number of known and unknown risks, uncertainties and other factors that could cause actual results to differ materially from those expressed, projected or implied by such forward-looking statements. Important risks, uncertainties and other factors include, but are not limited to, the on-going downturn, disruption and volatility in the economy, financial markets and business markets and the effects thereof on the Company’s markets and customers, the demand for its products and services, and the Company’s access to capital; the size, timing and terms of sales and orders, including the Company’s revenue backlog discussed in this press release, and the risk of customers delaying, deferring or canceling purchase orders or making smaller purchases than expected; the effects of the sale of Southern Flow business and WaterSecure investment and the Company’s strategy of monetizing its non-core businesses on the Company’s financial condition and results of operations; the potential adverse financial and reputational consequences that can result from safety risks and hazards such as accidents inherent in our operations; the effects of exiting the Company’s PowerPackages business, including any future charges we may incur; the timely and successful development, production and market acceptance of new and enhanced products, services and technologies of the Company; the ability of the Company to obtain adequate supplies of key components and materials of sufficient reliability and quality for its products and technologies on a timely and cost-effective basis and the effects of related warranty claims and disputes; the ability of the Company to successfully expand its core distributed generation products and services, to successfully develop and achieve market acceptance of its new energy-related businesses, to successfully expand its recurring revenue projects, to manage its growth and to address the effects of any future changes in utility tariff structures and environmental requirements on its business solutions; the effects of competition; changes in customer and industry demand and preferences; the ability of the Company to continue the growth and diversification of its customer base; the ability of the Company to attract, retain, and motivate its executives and key personnel; changes in the energy industry in general and the electricity, oil, and natural gas markets in particular, including price levels; the effects of competition; the ability of the Company to secure and maintain key contracts and relationships; the

effects of pending and future litigation, claims and disputes; and other risks, uncertainties and other factors identified from time to time in its reports filed with or furnished to the Securities and Exchange Commission, including the Company’s most recent Annual Report on Form 10-K, as well as subsequently filed reports on Form 10-Q and Form 8-K. Accordingly, there can be no assurance that the results expressed, projected or implied by any forward-looking statements will be achieved, and readers are cautioned not to place undue reliance on any forward-looking statements. The forward-looking statements in this press release speak only as of the date hereof and are based on the current plans, goals, objectives, strategies, intentions, expectations and assumptions of, and the information currently available to, management. The Company assumes no duty or obligation to update or revise any forward-looking statements for any reason, whether as the result of changes in expectations, new information, future events, conditions or circumstances or otherwise.

Contact

Chris Hutter

Chief Financial Officer

PowerSecure International, Inc.

(919) 453-1760

PowerSecure International, Inc.

Consolidated Statements of Operations (unaudited)

($000’s except per share data)

PowerSecure International, Inc.

Condensed Consolidated Balance Sheets (unaudited)

($000’s)

PowerSecure International, Inc.

Condensed Consolidated Statement of Cash Flows (unaudited)

($000’s)

Non-GAAP Pro forma Financial Measures:

Our references to our fourth quarter 2010, full year 2010, and full year 2011 “Non-GAAP Pro forma” financial measures of net income from continuing operations, net income, net income attributable to PowerSecure International, Inc., diluted E.P.S. from continuing operations, diluted E.P.S. from discontinued operations, and diluted E.P.S. discussed and shown above constitute non-GAAP financial measures. They refer to our GAAP results, adjusted to show the results 1) without income from our WaterSecure investment (identified in our financial statements as our unconsolidated affiliate), utilizing our full year 2010 and 2011 effective tax rate to determine the after-tax impact of adjusting for this item for each of those years, respectively, and 2) without the gain on the sale of our WaterSecure investment, utilizing our full year 2011 effective tax rate to determine the after-tax impact of adjusting for this item, 3) without the after-tax gain on the sale of our discontinued Southern Flow business, and 4) without the after-tax results of our discontinued PowerPackages business.

We believe providing non-GAAP measures which show our pro forma results with these items adjusted is valuable and useful as it allows our management and our board of directors to measure, monitor and evaluate our operating performance with the same consistent financial context as the business was managed and evaluated for the 2011 fiscal year. Additionally, because our Southern Flow business was sold in January, 2011, our WaterSecure business was sold in June, 2011, and our PowerPackages business was discontinued in 2011, these Pro forma measures provide baseline comparatives which are more comparable to our current and future results.

We believe these Non-GAAP Pro forma measures also provide meaningful information to investors in terms of enhancing their understanding of our fourth quarter and full year 2011 operating performance and results, as they allow investors to more easily compare our financial performance on a consistent basis compared to 2010. These Non-GAAP Pro forma measures also correspond with the way we expect Wall Street Analysts’ historical comparative results to be presented. Our Non-GAAP Pro forma measures should be considered only as supplements to, and not as substitutes for or in isolation from, our other measures of financial information prepared in accordance with GAAP, such as GAAP revenue, operating income, net income from continuing operations, net income, net income attributable to PowerSecure International, Inc., diluted E.P.S. from continuing operations, diluted E.P.S. from discontinued operations, and diluted E.P.S.

PowerSecure International, Inc.

Non-GAAP Pro-forma Financial Measures – 4Q10, 2010, and 2011

Results of Operations Excluding WaterSecure Income and Gain on Sale, and Southern Flow and PowerPackages Discontinued Operations

PowerSecure International, Inc.

Non-GAAP Pro-forma Financial Measures – 4Q10, 2010, and 2011

Results of Operations Excluding WaterSecure Income and Gain on Sale, and Southern Flow and PowerPackages Discontinued Operations