Updated 01:29 AM PHT Tue, April 11, 2017
Metro Manila (CNN Philippines, April 10) — Saturday's series of quakes in Batangas put national power supply in the Luzon grid under 'red alert' mid-Monday.
Power grid operator National Grid Corporation of the Philippines (NGCP) declared red alert for two hours due to high power insufficiency, which means electricity reserves were below minimum level.
Major power plants in Batangas such as the San Lorenzo, Sta. Rita, and Calacan plants tripped during the earthquake, dropping the power supply to the grid by more than 2000 megawatts (MW).
Seven power plants had outages after the Batangas quakes, but two have been back online as of 7:04 a.m.
At 1 p.m., the available capacity of the power grids was at 9,300 M, but the peak demand was at 9,370 MW.
The Department of Energy (DoE) appealed to customers to lessen power consumption to avoid power outages.
"Kinakausap na natin yung mga consumers na pwedeng basawan po 'yung ating load, 'yung ating karga sa paggamit ng kuryente," DOE Undersecretary Felix William Fuentebella said.
[Translation: We are talking to consumers to lessen the load on electricity use.]
The red alert went down to a yellow alert at lifted at 3 p.m., and the yellow alert was lifted at 4:40 p.m.
A yellow alert means that the reserves are below 647 MW.
Authorities are preparing for the worst case scenario of power reserves on the following days.
Despite the lack of reserves, power distributor Manila Electric Company (MERALCO) confirmed that supply is constant and remains stable.
NGCP and DOE expect the demand to go down by Maundy Thursday up to Black Saturday as people observe the Holy Week.