Solar photovoltaic power generation is based on the principle of photovoltaic effect, using solar cells to directly convert solar energy into electrical energy. Regardless of whether it is used independently or connected to the grid, the photovoltaic power generation system is mainly composed of three parts: solar panels (components), controllers and inverters. Of course, an energy storage battery system is needed if necessary.

　　According to the transmission mode, solar photovoltaic power generation is divided into three types: off-grid photovoltaic power generation, grid-connected photovoltaic power generation, and distributed photovoltaic power generation.

　　(1) Off-grid photovoltaic power generation

　　It is mainly composed of solar cell components, controllers, and energy storage batteries. If you want to supply power to AC loads, you also need to configure an AC inverter.

　　(2) Grid-connected photovoltaic power generation

　　It is the direct current generated by photovoltaic panels that are converted into alternating current through a grid-connected inverter, and then connected to the grid, which is uniformly deployed to supply power to users. This kind of power station has a large investment, a long construction period, and a large area, and its development is relatively difficult. Distributed small grid-connected photovoltaic systems, especially photovoltaic building integrated power generation systems, have a huge market demand for individual users due to the advantages of small investment, fast construction, and small footprint.

　　(3) Distributed photovoltaic power generation

　　Also known as distributed power generation or distributed power supply, it refers to the configuration of a small photovoltaic power supply system at the user site or close to the power site to meet the needs of specific users. The excess or insufficient power is adjusted by connecting to the grid.

　　Its basic equipment includes photovoltaic cell components, photovoltaic square array brackets, DC combiner boxes, DC power distribution cabinets, grid-connected inverters, AC power distribution cabinets and other equipment, as well as power supply system monitoring devices and environmental monitoring devices.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.

　　Solar power generation system with lithium battery energy storage system is a very promising clean energy.