Around 12,000 customers were affected by the outage, which occurred at around 6pm on Sunday.
"In principle, the entire municipality is without power," says Lars Larenius, CEO of Oxelö Energi, to SVT.
He says that the problem is at a so-called handover point from the regional grid.
Technicians are now on their way to the scene. The fault is expected to be fixed this evening.
