Method and device for testing energy consumption saving amount of battery applied to solar photovoltaic car roof

The invention provides a method and device for testing the energy consumption saving amount of a battery applied to a solar photovoltaic roof, and relates to the technical field of vehicle testing, and the method comprises the steps: carrying out the pre-test preparation of a to-be-tested vehicle, placing the vehicle on a chassis dynamometer, and connecting a data collection system and an electric quantity measurement device; a solar photovoltaic panel is mounted on the roof of the vehicle; testing the electric energy consumption of the vehicle under a set illumination condition, and starting the energy collection function of the solar photovoltaic panel and closing the energy collection function of the solar photovoltaic panel in the testing process so as to obtain first electric energy consumption when the solar photovoltaic panel is started and second electric energy consumption when the solar photovoltaic panel is closed; and according to the difference value between the first electric energy consumption