Abstract: In the context of the "two-carbon" goal and the construction of a new power system, the large-scale access of distributed photovoltaic has promoted the acceleration of the development and upgrading of distributed photovoltaic, while bringing about problems such as insufficient carrying capacity of the distribution network, and the allocation of energy storage equipment is an important means to solve such problems. In this paper, the application scenario, technical parameters and economy of distributed photovoltaic energy storage are analyzed, and finally the energy storage configuration strategy suitable for large-scale access of distributed photovoltaic is proposed.