Vietnam Rolls Out First ASEAN Two-Part Tariff for Battery Storage

Vietnam implemented Circular No. 62/2025/TT‑BCT in January 2026, establishing a two‑part tariff for battery energy storage systems that separates capacity and energy charges. The new regime aims to reward storage assets for both availability and delivery, unlocking over US$750 million of investment this year and paving the way for up to US$5.7 billion by 2030. Analysts say the policy removes a key barrier to ASEAN's clean‑energy transition.

The reform’s impact extends beyond Vietnam. A 1 GWh grid‑forming battery project in Cambodia’s Pursat province, developed by SchneiTec, showcases commercial deployment of advanced storage technology. Studies cited in the article estimate that co‑located solar and storage could generate US$2.25 billion of annual revenue for the Philippines by 2030, while Thailand’s market still lags behind regional peers.