Entergy Mississippi scored a victory in an 11 year rate battle brought by the former attorney general, who claimed the utility overcharged customers.

Customers of Entergy’s five utility subsidiaries have saved about $1.3 billion since they joined MISO in 2013, the company announced.

Entergy Mississippi gained FERC approval to purchase the 810-MW Choctaw Generating Station for $314 million from NRG Wholesale Generation.

Entergy Mississippi is supporting multiple bills that would restrict the ability of the state’s attorney general to sue utilities.