During the daytime, under the light condition, the solar cell module generates a certain electric potential, and through the series and parallel connection of the module, the solar cell square array is formed, so that the voltage of the square array reaches the system input voltage requirement. The battery is then charged by the charge/discharge controller to store the electricity converted from light energy. At night, the battery bank provides input power for the inverter, and through the role of the inverter, the DC power is converted into AC power and delivered to the distribution cabinet, which is powered by the switching role of the distribution cabinet. The discharge of the battery bank is controlled by the controller to ensure the normal use of the battery. The photovoltaic power system should also have load limiting protection and lightning protection devices to protect the system equipment from overload operation and lightning strikes and maintain the safe use of system equipment.
Regardless of the form, the working principle is that photovoltaic modules convert light energy into direct current, which is transformed into alternating current under the action of the inverter, and finally realizes the function of electricity consumption and Internet access.
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