SO ▼ -1.0% - The Southern Company $SO - Georgia Power's Robins Battery Storage achieves commercial operation helping to ensure reliable energy in Georgia Georgia Power's new Robins Battery Storage facility has achieved commercial operation, adding grid-scale energy storage capacity to support reliability in Georgia. $SO declined 1.0% today despite the operational milestone, suggesting investors may have been pricing in the project's completion or focusing on broader market headwinds. 15-SEP-2026 12:02 PM ET