ACQUISITIONS AND DISPOSITIONS (Tables)

12 Months Ended

Dec. 31, 2024

Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]

Schedule of construction projects

Project Facility	Resource	Approximate Nameplate Capacity (MW)	Location	Actual/Projected COD	PPA Contract Period
Projects Under Construction at December 31, 2024
Millers Branch
Phase I	Solar	200	Haskell County, TX	Fourth quarter 2025	20 years
Phase II	Solar	180	Haskell County, TX	Second quarter 2026	15 years
Phase III	Solar	132	Haskell County, TX	Fourth quarter 2026	15 years
Projects Completed During 2024
South Cheyenne	Solar	150	Laramie County, WY	April 2024	20 years
Projects Completed During 2022
Garland Solar Storage(a)	Battery energy storage	88	Kern County, CA	September 2021 through February 2022(b)	20 years
Tranquillity Solar Storage(a)	Battery energy storage	72	Fresno County, CA	November 2021 through March 2022(c)	20 years

(a)Southern Power consolidates each project's operating results in its financial statements and the tax equity partner and two other partners each own a noncontrolling interest. See Note 9 under "Lessor" for additional information.

(b)The facility has a total capacity of 88 MWs, of which 73 MWs were placed in service in 2021 and 15 MWs were placed in service in 2022.

(c)The facility has a total capacity of 72 MWs, of which 32 MWs were placed in service in 2021 and 40 MWs were placed in service in 2022.