Terra Solar inks battery energy storage deal with Huawei

This will be the tech giant’s biggest BESS project.

Terra Solar Philippines Inc., a unit of MGEN Renewable Energy Inc., has signed a battery energy storage systems supply agreement with Huawei International, Pte. Ltd. (Huawei) for the 3,500 megawatt MTerra Solar project.

The agreement covers the entire 4,500 megawatt-hour battery capacity of the world’s largest solar project. Huawei, with its expertise in large-scale renewable energy projects, will equip the facility with containerised batteries and auxiliary components such as fire suppression systems; heating, ventilation, and air conditioning; battery management systems; power conversion systems; and energy management systems.

It will also set up step-up transformers to connect to the 34.5 kilovolt busbar at the main substation. These systems will allow MTerra Solar to store excess electricity generated during low-demand periods and supply it back to the grid during peak demand.

The battery system will also include a two-stage DC/DC and DC/AC architecture and provide constant active power output, even under high-voltage ride-through conditions.

MTerra Solar, located north of Manila, recently broke ground in Nueva Ecija. It is set to begin commercial operations in phases, with Phase 1 scheduled for February 2026 and Phase 2 following in February 2027.