Abstract: Aiming at the economic evaluation of photovoltaic-battery charging station participating in real-time demand-side response,an optimal capacity configuration method of photovoltaic-battery charging station considering real-time demand-side response is proposed. Firstly,the frequency response requirements of power grid are considered,and the charging and discharging strategy of the photovoltaic storage system is optimized to meet the load demand. Then,a segmented linearization model of energy storage battery charging power is established based on the nonlinear characteristics of charging power under different states of charge（SOC）of the lithium battery. Finally,a two-layer planning model is established with the maximization of internal rate of return of the photovoltaic energy storage system throughout its life cycle as the economic evaluation index. The case analysis shows that the proposed algorithm can achieve a high level of profitability for photovoltaic-battery charging stations.