Solar photovoltaic power generation system

　　1. Solar cell array

　　The smallest unit used for photoelectric conversion is a solar cell monomer. Its size is 4-100cm2, working voltage is 0.45-0.50V, and working current is 20-25mA/cm2, so it cannot be used as a separate power source. In photovoltaic power generation systems, it is necessary to connect solar cells in series, parallel, and package them to form solar cell modules. Its power can range from a few watts to several hundred watts and can be used as a separate power source. A solar cell array is a type of photovoltaic power generation system that connects solar cell modules in series, parallel, and mounted on a bracket. It can output power of several hundred watts, several thousand watts, or even greater.

　　2. Solar battery

　　Independent photovoltaic power generation systems rely on batteries to store excess electricity, so batteries play an important role in independent photovoltaic power generation systems. At present, there are many types of batteries commonly used in photovoltaic systems, among which the most widely used are ordinary lead-acid batteries, alkaline nickel chromium batteries, and lead-acid maintenance free batteries.

　　As the selling price of solar cell modules decreases, the proportion of battery costs in the total system investment will gradually increase. Therefore, in system design, selecting the appropriate type of battery, determining the appropriate battery capacity, accurately implementing installation, operation, and careful maintenance are crucial for the normal operation of independent solar photovoltaic power generation systems.

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