Southern Power, announced an additional expansion of its 29th solar project ? Millers Branch Solar Facility. The Phase III expansion will account for an added 132-megawatts (MW) from the previous Phase I and Phase II expansion of 200 MW and 180 MW respectively.

This final development will bring the Millers Branch Solar Facility to a total generating capacity of 512 MW. The project, located in Haskell County, Texas, contributes to the company's growing renewable fleet of clean generating assets from California to Maine. Southern Power will lead the continued development and construction of all phases of Millers Branch.

Phase III is expected to achieve commercial operation in the fourth quarter of 2026. Southern Power signed power purchase agreements with Synopsys Inc. and Keysight Technologies for environmental attributes, such as renewable energy credits (RECs), produced under their respective shares of the Millers Branch Solar Facility. Sustainability Roundtable Inc. supported the power purchase agreement for Synopsys, the anchor tenant.

With the addition of Millers Branch Phase III, Southern Power's solar portfolio consists of more than 3,050 MW of solar generation currently operating or under construction. Southern Power's solar facilities are a part of the company's 5,590 MW renewable fleet, which consists of 30 solar and 15 wind facilities currently operating or under construction. This project aligns with Southern Power's overall business strategy of strengthening its wholesale business by acquiring and developing generating assets that are covered by long-term contracts with counterparties with strong credit support.