<p>The optical storage DC microgrid, a novel distributed energy system, strives for efficient, dependable, and eco-friendly energy utilization. Within this microgrid, precise control and balanced regulation of the battery’s state of charge (SOC) play a crucial role in ensuring system stability and enhancing energy efficiency, serving as the primary energy storage component. The traditional battery SOC control strategy often uses a fixed droop coefficient, but this method has problems such as large DC bus voltage deviation and slow SOC equalization speed, which limit the performance of optical storage DC microgrid. To overcome these shortcomings, this paper proposes a battery SOC adaptive droop control strategy, by dynamically adjusting the droop coefficient. Based on the current SOC status of the battery and system requirements, the system achieves a balanced SOC among the batteries and ensures a proper distribution of output current. The research shows that the battery SOC adaptive droop control strategy has significant performance advantages in the optical storage DC microgrid, which can effectively reduce the DC bus voltage fluctuation and improve the power quality of the system. At the same time, the strategy can also realize the rapid equalization of battery SOC, avoid the occurrence of overcharge and overdischarge, so as to protect the battery from damage.</p>