We saw the lights go out during the last Super Bowl, but New Jersey's largest utility promises it won't happen again at this year's game.
Public Service Electric and Gas successfully tested a relay device with a high electrical load to make sure it wouldn't shut down.
The device is similar to the one that failed at the Superdome earlier this year.
The company also added a third power line to Metlife Stadium.
Each line is capable of powering the complex on its own.
"From a performance of our systems standpoint, there's really not a big difference," said Ralph LaRossa, the president of PSE&G. "We're going to have more focus and more visibility, but it's just as important for us to keep the game on for state high school playoffs as it is for the Super Bowl."
Officials estimate that the amount of energy needed for the Super Bowl is enough to power 12,000 homes.
The game is set for February 2.