World’s largest solar-plus-storage site confirms safe grid connection

The world’s largest solar-plus-storage project, MTerra Solar in the Philippines, has achieved a major milestone by successfully completing its initial grid synchronization and energization with the Luzon grid. This event, held on February 12 in Gapan, Nueva Ecija, confirms the system’s readiness and safe connection, marking a critical step toward operational status. Phase 1 of the project is progressing on schedule, with 1,288 MWdc of solar photovoltaic capacity installed as of January 2026, making it the largest solar installation in the country. Additionally, 622 battery energy storage system units have been installed, positioning MTerra Solar to become the largest integrated solar and storage facility in the Philippines once fully operational. Key stakeholders highlighted the significance of this development for the country’s energy landscape. DOE Undersecretary Rowena Guevara emphasized that the switch-on enables MTerra Solar to begin exporting power and supplying firm, dependable capacity through its combined solar and battery storage system, which is especially