Power has been restored to 335 properties in the Glenorchy area, near Queenstown, after a blaze broke out on Tuesday night, engulfing more than 150ha of land.
Power was expected to be out for 48 hours, but crews worked overnight to restore it earlier.
Fire crews also stayed overnight to monitor the area, overnight rain helping them out.
At least two ground crews, including helicopter units, will remain on scene while investigations into the cause of the fire begin.
Otago rural fire controller Phil Marsh said there was still a lot of work to be done.
"While it may look like the fire is out, our crews still have a lot of work to do to ensure it doesn't flare back up and they will be working hard over the next few days to make sure it's safe," he said.
"The crews involved yesterday did an outstanding job, and it's a credit to their skill and professionalism that we've had over 50 people working alongside eight helicopters in a very demanding environment with no incidents or injuries."
Glenorchy Rd is open to the public, but authorities urge caution when driving through the area. Further closures should be expected.