: Vietnam's rapid expansion in renewable energy, particularly solar and wind, necessitates the adoption of Battery Electricity Storage Systems (BESS) to address the intermittency of these sources and ensure grid reliability. This article provides an overview of BESS fundamentals, including their operational principles, economic implications, and potential benefits for Vietnam. Despite the current lack of large- scale BESS deployment in Vietnam, the global market is growing rapidly, driven by technological advancements and decreasing costs. The article examines the present state of BESS in Vietnam, highlighting local manufacturing capabilities and regulatory challenges. It also explores strategic approaches outlined in Vietnam's National Power Development Plan (PDP 8) and long-term projections for BESS integration. While BESS has the potential to significantly enhance Vietnam's energy landscape, its successful implementation will depend on addressing economic, regulatory, and technical challenges.