PASIG CITY, Philippines — In a critical move to reinforce the national power grid, Meralco PowerGen Corporation (MGEN) announced that its affiliate, Terra Solar Philippines Inc. (MTerra Solar), has successfully energized its first 250 megawatts (MW) of solar capacity. Now operating as a generator, the facility has also activated the first tranche of its Battery Energy Storage System (BESS), capable of delivering up to 450 megawatt-hours (MWh) of energy to the grid at night. This development marks the largest operational battery storage currently available in the Philippines, providing essential support as the country navigates a state of national energy emergency triggered by global fuel market volatility.
The timing of the project’s phased energization is pivotal. With fuel prices surging and supply chains strained by ongoing Middle East tensions, the Department of Energy (DOE) has prioritized the fast-tracking of domestic renewable sources. MTerra Solar, which was initially authorized to export 85 MW during its testing phase, is now exporting up to 250 MW in coordination with the National Grid Corporation of the Philippines (NGCP). MGEN Renewables and MTerra Solar President and CEO Dennis B. Jordan noted that the milestone “underscores the role of projects like MTerra Solar in helping secure the country’s energy future at a time when reliability and affordability are under increasing pressure.“
Government officials have welcomed the capacity boost as a strategic buffer against external price shocks. Energy Secretary Sharon S. Garin described the grid synchronization as a “meaningful step” towards an energy-resilient Philippines, emphasizing that developments of this scale are essential for managing immediate supply challenges while transitioning to cleaner power. Similarly, MGEN President and CEO Emmanuel V. Rubio highlighted that the project’s ability to deliver energy beyond daylight hours through its integrated battery system will help maintain stable electricity prices as the nation enters the high-demand dry season.
As the Philippines remains a net importer of coal, oil, and liquefied natural gas (LNG), the integration of large-scale renewable projects is seen as a critical buffer against international price fluctuations. The new facilities are expected to provide immediate relief to the grid by increasing total available capacity and utilizing battery storage to deliver clean energy even after sunset. This flexibility is essential for meeting peak demand periods and reducing the operational necessity of generation plants that rely on expensive imported fuels.
Located across Nueva Ecija and Bulacan, the MTerra Solar project aims to eventually reach a massive capacity of 3,500 MWp of solar power paired with a 4,500 MWh battery storage system. Once fully operational, it is expected to serve approximately 2.4 million households and displace an estimated 4.3 million tons of carbon emissions annually. With Phase 1 on track for completion this year, the facility remains a cornerstone of the Philippines’ goal to achieve a 35% renewable energy share in the national power mix by 2030.
The DOE highlighted that the activation of the MTerra Solar project is a key component of a broader effort to safeguard Filipino consumers from the direct impact of global price shocks on electricity costs.
Moving forward, the DOE confirmed it will continue close coordination with the National Grid Corporation of the Philippines (NGCP), the Energy Regulatory Commission (ERC), and various power sector stakeholders.|
