MANILA, Philippines — After three consecutive days of grid strain and rolling blackouts that impacted millions of households, the private-led National Grid Corporation of the Philippines (NGCP) announced that the Luzon, Visayas, and Mindanao grids returned to normal operations on Saturday, May 16, 2026. However, the resolution of the immediate power supply crisis has shifted attention toward the regulatory and legal stability of the NGCP’s national franchise.
The stabilizing of the grid follows the return of major generation facilities to full capacity after an unexpected, simultaneous shutdown earlier in the week.
The power crunch reached a boiling point on Wednesday, May 13, 2026, when a massive generation deficit triggered extensive emergency blackouts across multiple regions:
- Meralco Outages: The Manila Electric Company (Meralco) reported that roughly 1.9 million consumers in portions of Metro Manila, Bulacan, Cavite, Laguna, Quezon, and Rizal suffered rolling blackouts lasting between two and three hours.
- National Impact: The NGCP recorded an additional 200,000 affected customers across the rest of the country, bringing the total number of blacked-out households to 2.1 million.
- The Deficit: The system collapse occurred when 3,942.8 megawatts (MW) of power vanished overnight due to simultaneous forced outages across dozens of power generation facilities.
Key generation facilities that went offline but have since restored full operations include GNPower Dinginin (GNPD) Unit 1 in Mariveles, Bataan (a 668-MW coal plant owned by AboitizPower Corp.), and all three units of the 1,275-MW Excellent Energy Resources Inc. (EERI) natural gas facility in Ilijan, Batangas City.
Energy Secretary Sharon Garin has aggressively mobilized the Grid Reliability Task Force (GRTF) to launch an immediate, transparent investigation into the triggers of the system collapse.
- Transmission Line Tripping: The probe will specifically deconstruct the structural failures that led to the simultaneous tripping of the Tayabas-Ilijan and Ilijan-Dasmariñas 500-kilovolt (kV) transmission lines, which are operated directly by the NGCP.
- Monitoring Failures: Regulators are questioning why the NGCP failed to take preventive action, considering internal logs showed that 17 power plants had already been on forced outage since the start of May, with several others sitting offline for months.
- Mandate for Disclosure: “An incident of this scale demands full technical disclosure, clear accountability, and immediate corrective action,” Secretary Garin stated.
The massive grid failure has reignited political and legislative scrutiny over Republic Act No. 9511, the law governing the corporate franchise of the NGCP.
The NGCP is a privately run consortium comprising Monte Oro Grid Resources Corporation, Calaca High Power Corporation, and the State Grid Corporation of China (SGCC), which holds a 40 percent stake. Lawmakers are pointing to the systemic lack of backup reserves and the slow modernization of transmission infrastructure as potential grounds to review, alter, or revoke the consortium’s long-term operational franchise. Critics argue that critical public infrastructure should not be vulnerable to repeated simultaneous plant drops without robust automated contingency systems.
For the immediate weekend, state dispatchers maintain a positive outlook, provided no further unexpected generation failures occur:
- Luzon Grid: Stabilized by the return of EERI and GNPower Dinginin.
- Visayas Grid: Logged an available capacity of 2,768 MW against a peak afternoon demand of 2,339 MW on Saturday.
- Outlook: “Barring any unexpected increase in demand or additional unplanned outages of power facilities, the power situation for this weekend is expected to remain stable,” the NGCP said in its latest advisory.