The Energy Regulatory Commission (ERC) has granted grid connection approval for the 3.5 GW MTerra Solar project—set to become the Philippines’ largest solar-plus-storage facility. The approval enables the project developer to build a dedicated point-to-point transmission link to the Luzon grid, addressing one of the major bottlenecks in renewable project execution in the country.
The project is being developed by Meralco PowerGen Corporation (MGEN) and its subsidiary SP New Energy Corporation (SPNEC), with UK-based Actis holding a 40 percent stake valued at USD 600 million. Engineering, procurement, and construction works are being led by Energy China, PowerChina, and Meralco Industrial Engineering Services Corporation (MIESCOR). Located across Nueva Ecija and Bulacan provinces on Luzon Island, the MTerra project will have a total capacity of 3.5 GW of solar power and 4.5 GWh of battery storage. The first phase—comprising 1.5 GW of solar and 2 GWh of storage—is already 54 percent complete as of July 2025, while transmission line construction reached 90 per cent by September 2025.
Upon completion, the project will be connected to the 500 kV Nagsaag–San Jose transmission line and the San Isidro 500 kV substation, strengthening grid reliability and renewable integration in Luzon. The development marks a significant milestone in the Philippines’ energy transition, aligning with the government’s targets for renewable expansion and reduced fossil fuel dependency.