Vietnam, with its tropical climate and abundant solar energy resources, is witnessing a significant increase in the deployment of solar power systems. To optimize the value of this energy source, the combination of solar power systems with Battery Energy Storage Systems (BESS) has emerged as a promising trend, offering numerous substantial benefits. 1. Load Shifting and Grid Stability: BESS has the capability to store excess energy generated by solar power systems during the daytime. During peak electricity demand periods, such as evenings, BESS can be used to mitigate peak loads and ensure grid stability. 2. Financial Efficiency: The integration of solar power systems with BESS enhances the financial performance of projects. BESS helps mitigate the inherent volatility of solar supply, ensuring that energy can be optimally utilized during peak cost periods. 3. Energy Resilience: BESS provides energy resilience in cases of emergencies or sudden power outages. This ensures uninterrupted operations for facilities, businesses, and households in the event of energy supply disruptions. 4. Market Participation Potential: BESS systems can flexibly participate in the energy market, contributing to services like providing backup power and short-term load adjustment to stabilize the grid. 5. Environmental and Climate Protection: The combination of solar power and BESS contributes to reducing emissions from fossil-fuel-based energy sources. This plays a crucial role in environmental protection and mitigating the impacts of climate change. In the future, the deployment of solar power systems combined with Battery Energy Storage Systems (BESS) in Vietnam will not only bring economic benefits but also contribute positively to the sustainable and cleaner development of the energy sector.