Grid operator National Grid Corp. of the Philippines placed the Luzon grid on red and yellow alerts on Monday after 2,648 megawatts of total capacity became unavailable to the grid.
NGCP placed the Luzon grid on red alert from 5 p.m. to 6 p.m. and raised yellow alert for interval hours between 10 a.m. 5 p.m. And 6 p.m. to 9 p.m.
This followed the forced outages of six power plants, while three others ran on derated capacities.
Available capacity was placed at 10,708MW on Monday compared to the peak demand of 10,246 MW.
The DOE said power plants on forced outages included Calaca 2, GNPower Mariveles 1, Sual 1, Sta. Rita Module 20, Masinloc 3 and San Buenaventura Power Plant.
Those running on derated capacities were Masinloc 1, Masinloc 2 and Magat.
Sual 1 and Masinloc 3 went back online at 10:19 a.m. and 11:19 a.m., respectively.
