Nigeria’s electricity supply has been fully restored following a partial collapse of the national grid, which disrupted power generation in several states on Monday.
Eko Hot News reports that the Nigerian Independent System Operator (NISO) confirmed the disturbance occurred at 2:01 p.m. on December 29, 2025, when generation levels dropped sharply from about 4,800 megawatts to just 139 megawatts, affecting supply to multiple distribution networks.
The collapse was caused by the tripping of several generating units and critical 330-kilovolt transmission lines, compounded by gas supply constraints from the vandalisation of the Escravos–Lagos pipeline, reducing fuel availability for thermal power plants.
Despite the outage, the Delta power generation complex continued to operate in island mode, supplying about 114 megawatts to parts of Delta and Edo states, including Oghara, Amukpe, Benin, and Efunrun substations.
Emergency procedures were activated at the National Control Centre in Osogbo, with operators stabilising the grid and coordinating restoration efforts. By Monday night, supply had been fully restored nationwide, and system stability normalised.
Authorities are investigating the cause of the grid disturbance and plan to implement measures to prevent future occurrences and strengthen the national grid.
The incident highlights ongoing challenges in Nigeria’s power sector, including ageing infrastructure, gas shortages, and transmission limitations, which have contributed to recurring disruptions in recent years.
