China’s Huawei has bagged its biggest BESS order to date and will supply the Meralco Terra Solar Project in the Philippines, which is considered the largest integrated solar and battery storage facility in the world.

The project is currently developed by Terra Solar Philippines, a subsidiary of SP New Energy Corp. (SPNEC), and will eventually feature 3.5 GWp of solar power and 4.5 GWh battery energy storage. The Terra Solar project will span 3,500 hectares across the provinces of Nueva Ecija and Bulacan and come with a price tag of PHP 185.28 billion ($3.25 billion).

The project is scheduled to begin commercial operations in phases, with phase 1 scheduled for February 2026 and phase 2 in February 2027.

Under the deal announced last week, Huawei will provide its containerized BESS and essential 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 include step-up transformers to connect to the 34.5 kV busbar at the main substation.

Huawei has already developed gigawatt-scale BESS projects with one of its fragship developments a 400 MW/1.3 GWh solar-plus-storage off-grid facility in Red Sea New City, Saudi Arabia, unveiled in September. That project is presently the world’s largest operating microgrid, delivering more than 1 TWh of green electricity annually.

The latest announcement is the second gigawatt-scale BESS supply deal in the Philippines within days. In what was touted as the largest BESS supply agreement in Southeast Asia to date, China’s Sungrow agreed to retrofit a 1.5 GWh of battery storage at Citicore’s solar plant in the Philippines. However, the supply deal was far outshadowed by Huawei’s oder.