The juice is once again flowing from San Onofre's nuclear power plant.
After shutting down during Thursday's big power outage, the plant began reconnecting to Southern California's electricity grid early Sunday, according to Southern California Edison.
Unit 2 was the first to go back online, at 8:17 a.m., ramping up to 98 percent of its capacity by Monday afternoon, according to an Edison website.
The plant's other generating station, Unit 3, returned to service Monday.
San Onofre had been offline since Thursday, when sensors detected a grid abnormality and initiated a protective shutdown, the website said. After workers reviewed and tested the system, they began reconnecting it to the grid.