The Visayas grid was placed under yellow alert for the second straight day on Thursday, with the National Grid Corp. of the Philippines (NGCP) warning of thin reserves from 5:00 p.m. to 7:00 p.m.

In an advisory this morning, the grid operator said available capacity stood at 2,500 megawatts (MW) against a projected peak demand of 2,301 MW.

NGCP said nine power plants have been on forced outage between April and November, while 4 have been offline since 2024, and 2 others since 2023. 

Another 18 generating units are operating at derated capacities, bringing the total unavailable capacity to approximately 660.5 MW. The unavailability of TVI Unit 2, which has a capacity of 169 MW, contributed to the tight reserve situation.

Luzon and Mindanao grids, on the other hand, remain under normal conditions.

A yellow alert is issued when operating margins are insufficient to meet the transmission grid’s contingency requirements.