Philippines Opens World's Largest Solar-Battery Site

The world's largest integrated solar and battery facility isn't where you'd expect—it's rising in Gapan, Nueva Ecija, in the heart of the Philippines.

Meralco PowerGen Corporation just inaugurated MTerra Solar Phase 1, a groundbreaking facility that combines 1,373 MW of solar panels with 825 MW of battery storage. That's enough clean electricity to power hundreds of thousands of homes while storing energy for cloudy days and nighttime use.

President Ferdinand Marcos Jr. celebrated the moment at the July 2026 ribbon cutting. "The MTerra Solar project is proof that the Philippines is capable not only of envisioning, but also of delivering," he told the crowd gathered at the sprawling facility.

The numbers tell an impressive story. Workers safely logged over 30 million hours building Phase 1 without a single lost-time injury. More than 2,000 MW of solar panels now stretch across the Nueva Ecija landscape, with 741 battery units ready to store sunshine for later.

Chairman Manuel V. Pangilinan captured the national pride surrounding the project. "What we inaugurate today will be the world's largest integrated solar and battery storage facility located in a single site," he said. "And it rises not in Texas, not in the Gobi Desert, but right here in Gapan, Nueva Ecija."

The facility solves a critical challenge for tropical countries. Solar panels generate power during sunny days, but batteries store that energy for evening peak demand when families come home and turn on lights and appliances. This combination means reliable clean power around the clock.

The project delivers the Philippines' lowest-cost renewable energy to the Luzon grid through a 600 MW power supply agreement with Meralco. That translates to more affordable electricity bills for customers while reducing the country's dependence on imported fossil fuels.

The Ripple Effect

MTerra Solar does more than generate megawatts. The project has invested 88.6 million Philippine pesos in local education, job training, public safety, and community development programs across Nueva Ecija and Bulacan provinces.

The facility pushes the Philippines closer to ambitious national goals of getting 35% of its electricity from renewables by 2030 and 50% by 2040. Lucy Heintz from partner Actis called it a game changer for "reducing import dependence, improving resilience and accelerating energy security."

Local communities are already seeing benefits beyond cleaner air. Thousands of Filipino workers built the facility, gaining valuable skills in cutting-edge renewable technology that positions them for future green energy projects across Southeast Asia.

The project carries the theme "Araw ng Pilipino"—Day of the Filipino—celebrating what the nation can achieve through collaboration between government, private companies, and determined workers. MTerra Solar stands as proof that developing countries can lead the global clean energy revolution, not just follow it.