The Department of Energy (DOE) confirmed that Mindanao's power grid remained stable as of June 18, with available generation capacity consistently surpassing electricity demand, providing a reliable reserve margin across the island.
Key Supply and Demand Figures
Data from the Mindanao 2026 Demand-Supply Situation report revealed that the island recorded a year-to-date peak demand of 2,775 megawatts (MW) on May 12. As of June 18, peak demand stood at 2,632 MW, supported by an available capacity of 3,109 MW, leaving a gross reserve of 477 MW. Total energy generation for that day reached 63,570 megawatt-hours (MWh).
From January 1 to June 18, the average actual system demand was 2,427 MW, while average available capacity reached 3,357 MW, resulting in an average gross reserve of 930 MW. This highlights the region's ability to maintain supply above demand during the first half of 2026.
Weekly Reserve Trends
Reserve levels fluctuated during the second week of June. On June 12, peak demand was 2,442 MW against 3,070 MW capacity, yielding a 628 MW reserve. Demand dropped to 2,174 MW on June 13, while capacity rose to 3,110 MW, pushing reserves to 936 MW—the highest that week. On June 14, demand increased to 2,315 MW with 3,142 MW capacity, leaving 827 MW reserve.
Demand continued climbing to 2,543 MW on June 15 and 2,585 MW on June 16, with reserves narrowing to 610 MW and 586 MW, respectively. By June 17, peak demand eased to 2,558 MW, but capacity declined to 3,079 MW, resulting in a 521 MW reserve. On June 18, demand rose again to 2,632 MW, and reserves tightened to 477 MW. Despite the decline, available capacity remained above demand, preventing power interruptions.
Implications for Grid Reliability
The DOE emphasized that maintaining adequate reserve margins is critical to protect consumers from supply shortages, especially during high temperatures, increased commercial activity, or scheduled maintenance. With demand expected to rise, the DOE is closely monitoring supply conditions to ensure continuous reliable operation. The figures are based on the latest NGCP Daily Operations Report released by the Department of Energy.
