SOUTHERN POWER
Southern Power to add Battery Energy Storage Resources to two California Solar Projects

"These projects will be two of the first co-located solar and storage projects operating in the California market," said Southern Power President Bill Grantham. "We're excited to be a part of the effort to enhance California's grid reliability. The addition of these storage resources to our clean energy portfolio is a great strategic fit for our business and will further position Southern Power to meet our customers' needs as the energy industry continues to evolve."

The battery-based energy storage additions will enhance California's grid reliability by providing SCE and the California ISO (CAISO) with additional flexible resource capacity that will assist in further integrating intermittent renewable energy into the grid. For the Garland Solar Facility in Kern County, California, 88 megawatts (MW) and 352 megawatt-hours (MWh) of energy storage will be added, while 72 MW and 288 MWh of energy storage will be added to the Tranquillity Solar Facility in Fresno County, California.

The energy storage projects will be owned in partnership with AIP Management (on behalf of Danish pension funds PKA and PenSam) and Global Atlantic Financial Group, both of which have existing ownership interests in the Garland and Tranquillity solar facilities that went into commercial operation in 2016. Southern Power operates the solar projects and will be responsible for operating the energy storage projects upon completion.

These two energy storage projects align with Southern Power's growth strategy of developing and acquiring projects covered by long-term contracts with strong credit counterparties.

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, some of which are owned in part with various partners, own or operate 52 facilities operating or under development in 13 states with more than 12,080 MW of generating capacity in Alabama, California, Delaware, Georgia, Kansas, Maine, Nevada, New Mexico, North Carolina, Oklahoma, Texas, Washington and West Virginia.

About Southern Company
Southern Company (NYSE: SO) is a leading energy company serving 9 million customers through its subsidiaries. The company provides clean, safe, reliable and affordable energy through electric operating companies in three states, natural gas distribution companies in four states, a competitive generation company serving wholesale customers across America, a leading distributed energy infrastructure company, a fiber optics network and telecommunications services. Southern Company brands are known for excellent customer service, high reliability and affordable prices below the national average. For more than a century, we have been building the future of energy and developing the full portfolio of energy resources, including carbon-free nuclear, advanced carbon capture technologies, natural gas, renewables, energy efficiency and storage technology. Through an industry-leading commitment to innovation and a low-carbon future, Southern Company and its subsidiaries develop the customized energy solutions our customers and communities require to drive growth and prosperity. Our uncompromising values ensure we put the needs of those we serve at the center of everything we do and govern our business to the benefit of our world. Our corporate culture and hiring practices have been recognized nationally by the U.S. Department of Defense, G.I. Jobs magazine, DiversityInc, Black Enterprise, Forbes and the Women's Choice Award. To learn more, visit www.southerncompany.com.

Cautionary Note Regarding Forward-Looking Statements:
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 expected capacity and storage additions. Southern Power cautions 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 Power; accordingly, there can be no assurance that such suggested results will be realized. The following factors, in addition to those discussed in Southern Power's Annual Report on Form 10-K for the year ended December 31, 2019, Quarterly Reports on Form 10-Q for the quarters ended March 31, 2020, June 30, 2020 and September 30, 2020 and subsequent securities filings, could cause actual results to differ materially from management expectations as suggested by such forward-looking information: the impact of recent and future federal and state regulatory changes, as well as changes in application of existing laws and regulations; the potential effects of the continued COVID-19 pandemic; variations in demand for electricity and natural gas; the ability to control costs and avoid cost and schedule overruns during the development, construction, and operation of facilities or other projects; the ability to construct facilities in accordance with the requirements of permits and licenses, to satisfy any environmental performance standards and the requirements of tax credits and other incentives, and to integrate facilities into the Southern Company system upon completion of construction; advances in technology; performance of counterparties under ongoing renewable energy partnerships and development agreements; potential business strategies, including acquisitions or dispositions of assets or businesses, which cannot be assured to be completed or beneficial to Southern Power; and the successful performance of necessary corporate functions. Southern Power expressly disclaims any obligation to update any forward-looking information.