Each unit has a Westinghousepressurized water reactor (PWR), with a General Electric turbine and electric generator. Units 1 and 2 were completed in 1987 and 1989, respectively. Each of Vogtle's units is capable of producing approximately 1,200 MW of electricity when online, for a combined capacity of 2,400 MW. Southern Nuclear lists the capacity as 1,215 MW each, for a combined output of 2,430 MW. The twin cooling towers are 548 ft (167 m) tall.
During Vogtle's construction, costs skyrocketed from an estimated $660 million to $8.87 billion. This was typical of the time due to increased regulations after the Three Mile Island accident.
In 2009, the NRC renewed the licenses for both units for an additional 20 years, to the 2040s.