More than 4,000 homes and businesses in Manly, on the beaches of northern Sydney, were left without electricity for most of Sunday from early in the morning.
Ausgrid said the fault was for an underground fault and promised to fix it before midnight.
Thousands of properties were cut off, most on Manly’s eastern hill, as of 4 p.m.
Manly in Sydney has been hit by a power outage. (new)
Bear Cottage, a children’s hospice, was forced to use reserve energy.
More than 105 guestrooms at Manly’s Q Station hotel, cafe and restaurant were in the dark, forcing several guests to leave early.
At the Manly Skiff Club, 300 lunch reservations were canceled and reservations were put on hold to see the state of origin.
According to its website, Ausgrid said it aimed to regain energy before 11 p.m.
The underground fault is located at the North Head substation.