Pasig City, Philippines – 30 March 2026 – Meralco PowerGen Corporation (MGEN), through its affiliate Terra Solar Philippines Inc. (MTerra Solar), has successfully energized the first 250 megawatts (MW) of its solar capacity – now operating as a generator and marking the start of its contribution to the country’s growing demand for reliable and clean energy. 

First tranche of Battery Energy Storage System (BESS) now delivers 450MWhr to the grid at night, which represents the largest operational BESS available in the Philippines

This milestone represents a critical step in the project’s phased development and comes at a pivotal time for the Philippines, as global fuel market volatility, driven in part by the current situation in the Middle East, continues to highlight the urgency of strengthening domestic and renewable energy sources. 

The early delivery of capacity from MTerra Solar reinforces efforts to enhance the country’s energy self-sufficiency and reduce exposure to imported fuel risks. 

“Reaching this milestone reflects the strong execution, collaboration, and dedication of our teams and partners. More importantly, it 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,” said MGEN Renewables and MTerra Solar President and CEO Dennis B. Jordan. 

MTerra Solar was initially authorized to export up to 85 MW of firm power to the grid as part of testing and commissioning activities. With the continued support from the Department of Energy (DOE) and the National Grid Corporation of the Philippines (NGCP), the facility is now exporting up to 250MW — providing additional capacity to help stabilize supply during a period of heightened system demand. 

During a previous MTerra Solar event, DOE Secretary Sharon Garin emphasized the project’s significance in strengthening the country’s renewable energy pipeline and addressing immediate supply challenges. 

“The initial grid synchronization of MTerra Solar – led by MGEN and Actis – represents a meaningful step towards our transition to a cleaner and more energy-resilient Philippines. Developments of this scale are critical as we navigate current global uncertainties while ensuring long-term energy security," Secretary Garin said. 

"Beyond its contribution to the renewable energy transition, MTerra Solar plays an important role in supporting the country’s near-term energy requirements. The project’s phased energization enables earlier delivery of capacity to the grid, helping ease supply constraints and supporting efforts to maintain stable electricity prices amid evolving global conditions," MGEN President and CEO Emmanuel V. Rubio shared. 

In addition, MTerra Solar has also energized the first tranche of its battery energy storage system (BESS). Through energy generated by its solar output, the plant has been able to deliver up to 450 MWh to the grid at night. This tranche now represents the largest operational BESS available in the Philippines. 

The MTerra Solar project is set to become the Philippines’ largest integrated solar PV and battery facility. Once fully completed, it will deliver 3,500 MWp of solar PV capacity paired with 4,500 MWh of BESS.

Following these milestones, the facility will still undergo a series of comprehensive activities in the coming weeks to ensure the safe, efficient, and reliable integration of battery storage with the solar facility. 

Once fully operational, the integrated BESS will enhance grid stability and enable the dispatch of renewable energy beyond daylight hours, strengthening system reliability while maximizing the value of solar power generation. 

MTerra Solar underscores MGEN’s commitment to advancing a diverse energy portfolio that addresses the energy trilemma – ensuring that supply remains sustainable, reliable, and affordable. 

At full capacity, the project is expected to generate up to 3,500 MWp of solar power, supported by a 4,500 MWh battery energy storage system – delivering clean energy to approximately 2.4 million households. 

The project will also avoid an estimated 4.3 million tons of carbon emissions annually, equivalent to removing more than 3 million gasoline-powered vehicles from the road. 

With  Phase 1 on track for completion this year and Phase 2 already under construction, MTerra Solar will continue to scale up its capacity, contributing meaningfully to the Philippines’ renewable energy targets of 35% by 2030 and 50% by 2040.