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A non grid solar system consist of the following items, solar panel, charge controller, battery and inverter if necessary. The function of the solar panel is to convert the sun energy to electrical energy. The charge controller is the interface and protection between the solar panel, battery and inverter. The battery is used to store the power from the solar panel and use when necessary. The function of the inverter is to convert the DC power of the battery to AC power to run the home appliances. There are also a lot of dc devices that can be connected to load diretly without an inverter to reduce the power consumption. The dc device can be led light, fan, timer, etc.