Power: NISO explains declining grid output

By Chris Ochayi

The Nigerian Independent System Operator, NISO, has attributed the current power outage to inadequate gas supply to thermal generating stations.

The NISO in a statement by its management on Friday, said the development has reduced the average available generation to approximately 4,300MW.

According tro the agency, “We hereby notify the general public and all market participants that the current average available generation of approximately 4,300MW is primarily due to inadequate gas supply to thermal generating stations.

“Given that thermal plants account for the dominant share of Nigeria’s generation mix, any disruption or limitation in gas supply directly affects available generation capacity and overall grid output.

“Consequently, the current energy allocated to Distribution Companies (DisCos) reflects the reduced supply available on the grid.

“Available operational data indicates that thermal power plants collectively require an estimated 1,629.75 million standard cubic feet (MMSCF) of gas per day to operate at optimal capacity.

“However, as of February 23, 2026, actual gas supply to the stations stood at approximately 692.00 MMSCF, representing a significant shortfall in daily gas supply requirements.

“The available gas supply represents less than 43% of the required volume, resulting in constrained generation output. The current low generation level is fundamentally driven by inadequate gas supply to thermal generating units, leading to reduced energy allocation to the DisCos.

“When total system generation drops significantly, the Independent System Operator must implement load shedding across the system, while dispatching available energy in line with the NERC MYTO allocation percentages across all distribution networks to maintain grid stability and prevent system disturbances.

“While we regret the inconvenience this situation may cause electricity consumers and affected market participants, we will continue to work closely with relevant stakeholders to ensure full energy allocation as soon as gas supply improves and generation capacity is restored.”