MGEN inaugurates first phase of MTerra Solar

It is one of the world's largest integrated solar and battery sites.

Meralco PowerGen Corp. (MGEN) and its partners have completed the first phase of the MTerra Solar project.

Phase 1 of MTerra Solar has energized 1,373 megawatts (MW) of solar PV capacity and 825 MW of battery energy storage, equivalent to 3,300 megawatt-hours (MWh). It is expected to become the world's largest integrated solar and battery projects once fully completed.

The facility's export capacity to the Luzon grid is currently limited to 750 MW while remaining grid-related works are completed with the system operator.

The project has also fully energised all 741 battery units, allowing it to supply clean electricity to the Luzon grid.

The company added that the project is ready to begin supplying power under its 600-MW mid-merit power supply agreement with Meralco following the completion of required grid tests.

President Ferdinand Marcos Jr., who attended the inauguration, said the project demonstrates the Philippines' capacity to deliver large-scale renewable energy developments. “The MTerra Solar project is proof that the Philippines is capable not only of envisioning, but also of delivering.”

“What we inaugurate today will be the world’s largest integrated solar and battery storage facility located in a single site,” said MGEN Chairman Manuel Pangilinan. “And it rises not in Texas, not in the Gobi Desert, but right here in Gapan, Nueva Ecija.”

“Beyond building one of the world’s most significant renewable energy facilities, we are helping build a stronger and more resilient Philippine energy system capable of supporting the country’s long-term economic growth,” added Emmanuel Rubio, president and CEO of MGEN.

As of end-June 2026, more than 2,000 MWdc of solar panels had been installed under Phase 1. The project has also logged more than 30 million work hours without a lost-time injury, highlighting its safety performance during construction.