Major Power Outage Leaves 12,000 Without Electricity in Oxelösund

On the evening of October 4th, 2026, a significant power outage struck Oxelösund, affecting approximately 12,000 electricity customers across nearly the entire municipality. The blackout began around 6 PM and lasted for several hours until power was restored just before 9 PM.

Lars Larenius, CEO of Oxelö Energi, reported that the outage originated from a failure at a regional grid handover point typically used to supply the municipality's power. Normally, Oxelösund relies on two such handover points; however, at the time of the incident, one of these points was unavailable due to maintenance, which left the municipality dependent on the other point. The failure was traced to a malfunction in a relay at this active handover point. Vattenfall, which is responsible for these handover facilities, identified the fault as stemming from a transformer issue, although the precise cause of the fault remains unknown.

During the blackout, emergency power systems were activated to support critical infrastructure, including nursing homes and water treatment plants, ensuring essential services continued to operate without interruption.

Technicians were dispatched promptly to address the technical failure, and the outage was resolved within approximately three hours. The incident highlighted the vulnerability of the municipality's power supply given the temporary maintenance status of one handover point.

According to Lars Larenius, the swift response helped mitigate wider impacts, but the event underscored the importance of maintenance scheduling and infrastructure redundancy to avoid future disruptions.