Abstract: To investigate the flexible power regulation characteristics of electric vehicle（EV） wireless charging for building-side photovoltaic systems,a data-driven modeling approach is proposed. This approach employs the instrument variable method to identify the dynamic model of EV wireless charging. Further,an internal mode controller is designed based on the acquired model to quickly and stably control the charging power of the electric vehicle. Experiments have proved that the designed controller can not only autonomously regulate the wireless charging power of electric vehicles and inhibit the power fluctuation of household electrical appliances when they are casting and cutting, but also quickly respond to the fluctuation of the power of photovoltaic power generation and guarantee the supply-demand balance and increase photovoltaic absorption rate.