PHOTOVOLTAIC SYSTEM

摘要

A photovoltaic system includes a photovoltaic component (10), a maximum power point tracking controller (22), an electric-power storage device (30) and a boost/buck circuit. The photovoltaic component is used to absorb the energy of sunlight and convert the energy of sunlight into electric energy. The maximum power point tracking controller is used to track the maximum power point of the photovoltaic component and make the photovoltaic component keep working at the maximum power point. The electric-power storage device with a rated charging voltage is electrically connected with the photovoltaic component to store the converted electric energy. The boost/buck circuit is connected between the maximum power point tracking controller and the electric-power storage device and used to boost/reduce the output voltage at the maximum power point of the photovoltaic component to the rated charging voltage of the electric-power storage device. The output electric energy at the maximum power point of the photovoltaic component can be fully and effectively used by matching the output voltage of the photovoltaic component with the rated charging voltage of the electric-power storage device, so that the photovoltaic system can obtain the maximal efficiency.