1. The off-grid power generation system is mainly composed of solar cell components, controllers, and batteries. If the output power is AC 220V or 110V, an inverter is also required.

2. The grid-connected power generation system is that the direct current generated by the solar module is converted into the alternating current that meets the requirements of the mains grid through the grid-connected inverter and then directly connected to the public grid. The grid-connected power generation system has centralized large-scale grid-connected power stations, which are generally national-level power stations. However, this kind of power station has not developed much due to its large investment, long construction period and large area. The decentralized small grid-connected power generation system, especially the photovoltaic building-integrated power generation system, is the mainstream of grid-connected power generation due to its advantages of small investment, fast construction, small footprint, and strong policy support.
3. Distributed power generation system, also known as distributed power generation or distributed energy supply, refers to the configuration of a smaller photovoltaic power supply system at the user site or near the power site to meet the needs of specific users and support the existing distribution network. economic operation, or both.