The 40 MW/60 MWh Alaminos Energy Storage system, developed by ACEN, is connected to the 120 MW Alaminos solar farm in the Philippines.
Image: ACEN
By ESS news
Developers building intermittent renewable power plants in the Philippines with a capacity of 10 MW or more will also be required to install energy storage systems (ESS) in addition to the new Department of Energy regulations.
The DOE updated its Energy Storage Systems Policy on February 26, 2026, with a framework establishing the minimum amounts of energy storage capacity that must be installed adjacent to affected plants. According to the new rules, projects will have to integrate ESS with a capacity of at least 20% of the installed capacity of the generation plant as part of project development and grid integration. The DOE said this is consistent with systems studies and local technical requirements.
The deployment of renewable energy sources has accelerated in the Philippines, driven by reforms that lifted restrictions on foreign investment and improvements in permitting procedures for solar projects. Flagship projects include the 3.5 GW solar and 4.5 GWh battery ESS MTerra project, which completed initial grid synchronization and energization for the first phase in February 2026.
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