In a sun-scorched field in Gapan City, Nueva Ecija, a vast grid of solar panels stretches toward the horizon beside massive batteries that store that energy for later use. This is MTerra Solar, and on Tuesday it became a little bit real — and a whole lot huge.
President Ferdinand Marcos Jr. led the inauguration of Phase 1 of what will eventually become the world's largest integrated solar and battery storage facility at a single site. Developers broke ground on the project less than two years ago, and already 1,373 megawatts of solar panels and 825 megawatts of battery storage capacity have been energized — enough to power a small country.
"What we inaugurate today will be the world's largest integrated solar and battery storage facility located in a single site," said Manuel V. Pangilinan, chairman of MGen, the company behind the project. "And it rises not in Texas, not in the Gobi Desert, but right here in Gapan, Nueva Ecija."
The project matters because the Philippines currently relies heavily on imported coal and natural gas to keep the lights on. When global fuel prices spike, Filipino families and businesses feel it in their monthly bills. MTerra aims to change that equation. The facility's batteries are just as important as its solar panels — they let clean electricity flow even after the sun goes down, making the power grid more stable and reliable.
Once fully completed, MTerra will stretch across provinces to deliver 3.5 gigawatts of solar generation supported by 4.5 gigawatt-hours of battery storage. That's enough clean electricity to serve more than 2.4 million households and avoid an estimated 4.3 million metric tons of carbon dioxide emissions each year — roughly equivalent to taking nearly a million cars off the road.
Right now, the facility can export 750 megawatts to the Luzon grid while final transmission upgrades are finished. By August 2026, Phase 1 should be fully operational and supplying 600 megawatts to Meralco, the country's largest electricity provider. Phase 2 is already under construction and scheduled for completion in 2027.
Marcos called the project proof that the Philippines can build world-class energy infrastructure while cutting its dependence on imported fuels. Beyond cleaner air, government economists estimate MTerra will generate roughly Php 23 billion (about $400 million) in economic value over the next decade through taxes, local jobs, and community programs.
"The energy transition must deliver not only cleaner power, but also reliable and affordable electricity for Filipinos," said Emmanuel Rubio, MGen's president and CEO. "MTerra Solar demonstrates what is possible when vision, innovation, and collaboration come together."
The Philippines is betting big on solar. MTerra is just the beginning — a sign of where the country's energy future is heading, one panel and battery cell at a time.