Introduction of solar photovoltaic system

The solar photovoltaic system is composed of a solar battery pack, a solar controller, and a storage battery (group). If the output power is AC 220V or 110V, an inverter is also required. Solar photovoltaic systems are divided into off-grid photovoltaic power generation systems, grid-connected photovoltaic power generation systems, and distributed photovoltaic power generation systems.

1.Off-grid photovoltaic power generation system

Off-grid photovoltaic power generation systems are mainly composed of solar cell components, controllers, and batteries. To supply power to AC loads, an AC inverter is also required.

2. Grid-connected photovoltaic power generation system

Grid-connected photovoltaic power generation system is that direct current is converted into alternating current that meets the requirements of the mains grid through a grid-connected inverter. The grid-connected power generation system has a centralized large-scale grid-connected power station. The main feature is that the generated energy is directly transmitted to the grid, and the grid is uniformly deployed to supply power to users. However, this kind of power station has a large investment, a long construction period, and a large area, and it has not developed much yet. Distributed small-scale grid-connected power generation systems, especially photovoltaic building-integrated power generation systems, are the mainstream of grid-connected power generation due to the advantages of small investment, fast construction, small footprint, and large policy support.

3. Distributed photovoltaic power generation system

Distributed photovoltaic power generation system refers to a small photovoltaic power generation system configured at the user site or close to the power site, in order to meet the needs of specific users, support the economic operation of the existing distribution network, or meet the requirements of both aspects.

Distributed photovoltaic power generation systems include 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. Its operating mode is that under the condition of sunlight, the solar cell module array converts the energy output from the solar energy and sends it to the DC distribution cabinet through the DC combiner box. The grid-connected inverter converts the AC power to the building's own load. Or insufficient power is regulated by connecting to the grid.