On 21 June 2026, EVN asked regulators to clarify the economic and operational benefits of solar projects with battery storage, saying BESS raises costs and its grid value remains unclear.
On 21 June 2026, The Investor published EVN's comments on the proposed 2026 power generation price framework for solar projects equipped with battery energy storage systems (BESS). Source title: EVN questions cost effectiveness of solar-plus-storage projects as Vietnam prepares new power price framework.
EVN said battery storage materially increases project investment costs, which in turn raises electricity tariffs compared with conventional solar plants. The utility also said the actual operational value of storage and its contribution to the national grid remain unclear.
According to the article, solar projects integrated with storage are priced about 11-14% higher than equivalent projects without storage. EVN urged regulators to define dispatch rights, operational objectives, storage-use mechanisms and developers' maintenance responsibilities before large-scale rollout.
The content below is summarized from the cited source.
Main source: The Investor.
