Southern Company subsidiary's Tranquillity Solar Facility in California begins operation

ATLANTA, September 26, 2016 – Southern Company subsidiary Southern Power and Recurrent Energy today announced the commercial operation of the 200-megawatt (MW) Tranquillity Solar Facility in California.

“The Tranquillity Solar Facility will help meet the energy needs of customers now and in the future,” said Southern Power President and CEO Buzz Miller. “Through strategic acquisitions we continue our solar generation growth, creating one of America’s largest renewable portfolios.”

Southern Power has announced, acquired or is constructing more than 2,400 MW of renewable ownership with 31 solar, wind and biomass projects, including 11 solar projects in California. In all, the Southern Company system has added or announced more than 4,000 MW of renewable energy projects since 2012.

Southern Power is the majority owner of the Tranquillity Solar Facility. Recurrent Energy, a subsidiary of Canadian Solar Inc., owns the remaining interest. Construction of the facility began in July 2015 on 1,900 acres of land in Fresno County, California. The solar power plant is capable of generating enough energy to help power the needs of approximately 50,000 homes.

“The Tranquillity solar facility is the product of long-term collaboration with financial partners, local communities and other stakeholders,” said Dr. Shawn Qu, Chairman and Chief Executive Officer of Canadian Solar. “This milestone is a testament to our commitment to the communities and ecosystems where we operate, which is a critical ingredient of our project development success.”

The Tranquillity Solar Facility fits Southern Power’s business strategy of growing its wholesale business through the acquisition and construction of generating assets substantially covered by long-term contracts. The electricity and associated renewable energy credits generated by the facility are being sold under a 15- year power purchase agreement with Southern California Edison.

About Southern Power
Southern Power, a subsidiary of Southern Company, is a leading U.S. wholesale energy provider meeting the electricity needs of municipalities, electric cooperatives, investor-owned utilities and other energy customers. Southern Power and its subsidiaries own or have the rights to 41 facilities operating or under construction in 11 states with more than 11,700 MW of generating capacity in Alabama, California, Florida, Georgia, Maine, Minnesota, Nevada, New Mexico, North Carolina, Oklahoma and Texas.

About Recurrent Energy
Recurrent Energy, a subsidiary of Canadian Solar Inc., is redefining what it means to be a mainstream clean energy company, with utility-scale solar plants that provide competitive clean electricity. The company has more than 4 GW of solar projects in development in North America. Additional details are available at: www.recurrentenergy.com

About Canadian Solar Inc.
Founded in 2001 in Canada, Canadian Solar is one of the world’s largest and foremost solar power companies. As a leading manufacturer of solar photovoltaic modules and provider of solar energy solutions, Canadian Solar also has a geographically diversified pipeline of utility-scale power projects in various stages of development. In the past 14 years, Canadian Solar has successfully delivered over 16 GW of premium quality modules to over 90 countries around the world. Furthermore, Canadian Solar is one of the most bankable companies in the solar industry, having been publicly listed on NASDAQ since 2006. For additional information about the company, visit the Company’s website or follow Canadian Solar on LinkedIn.

About Southern Company
Southern Company (NYSE: SO) is America’s premier energy company, with 44,000 megawatts of generating capacity and 1,500 billion cubic feet of combined natural gas consumption and throughput volume serving 9 million electric and gas utility customers through its subsidiaries. The company provides clean, safe, reliable and affordable energy through electric utilities in four states, natural gas distribution utilities in seven states, a competitive generation company serving wholesale customers across America and a nationally recognized provider of customized energy solutions, as well as fiber optics and wireless communications. Southern Company brands are known for excellent customer service, high reliability and affordable prices that are below the national average. Through an industry-leading commitment to innovation, Southern Company and its subsidiaries are inventing America’s energy future by developing the full portfolio of energy resources, including carbon-free nuclear, 21st century coal, natural gas, renewables and energy efficiency, and creating new products and services for the benefit of customers. Southern Company has been named by the U.S. Department of Defense and G.I. Jobs magazine as a top military employer, recognized among the Top 50 Companies for Diversity by DiversityInc, listed by Black Enterprise magazine as one of the 40 Best Companies for Diversity and designated a Top Employer for Hispanics by Hispanic Network. The company has earned a National Award of Nuclear Science and History from the National Atomic Museum Foundation for its leadership and commitment to nuclear development and is continually ranked among the top utilities in Fortune’s annual World’s Most Admired Electric and Gas Utility rankings. Visit our website at www.southerncompany.com.

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Certain information contained in this release is forward-looking information based on current expectations and plans that involve risks and uncertainties. Forward-looking information includes, among other things, statements concerning Southern Power’s strategic plans and the benefits of the Tranquillity Solar Facility. Southern Company and Southern Power caution that there are certain factors that can cause actual results to differ materially from the forward-looking information that has been provided. The reader is cautioned not to put undue reliance on this forward-looking information, which is not a guarantee of future performance and is subject to a number of uncertainties and other factors, many of which are outside the control of Southern Company and Southern Power; accordingly, there can be no assurance that such suggested results will be realized. The following factors, in addition to those discussed in each of Southern Company’s and Southern Power’s Annual Reports on Form 10-K for the year ended December 31, 2015, and subsequent securities filings, could cause actual results to differ materially from management expectations as suggested by such forward-looking information: the ability to control costs and avoid cost overruns during the development and construction of generating facilities, to construct facilities in accordance with the requirements of permits and licenses, and to satisfy any operational and environmental performance standards, including the requirements of tax credits and other incentives and potential business strategies, including acquisitions or dispositions of assets or businesses, which cannot be assured to be completed or beneficial to Southern Company or Southern Power. Southern Company and Southern Power expressly disclaim any obligation to update any forward- looking information.

Media Contact:

Southern Company Media Relations
404-506-5333 or 1-866-506-5333
www.southerncompany.com

Recurrent Energy Media Relations
415-501-9533
PR@RecurrentEnergy.com