Introduction to the principle of residential off-grid and grid-connected power generation systems solar street light-litersolar

The working principle of the residential grid-connected power generation system: The residential grid-connected power generation system is to install solar modules on the roof of the residents, and the system is connected to the grid to jointly undertake the task of power supply. When the solar radiation of the module meets the power generation requirements, the inverter in the system converts the direct current generated by the photovoltaic power generation system into alternating current, which directly supplies power to the household loads of the residents. If it is greater than the household electricity consumption, the remaining electricity will be integrated into the grid. The holder of the power generation system can also choose to directly integrate all the power generated by the photovoltaic system into the grid. In the case that the amount of solar radiation cannot meet the power generation requirements required by the system, all the electricity required by the household load is directly supplied by the grid. The structure of the residential grid-connected power generation system is relatively simple, consisting of photovoltaic modules, DC switches, inverters and cables. The capacity of the residential roof system is related to the size of the roof area, usually ranging from 2kW to 10kW. The working principle of the residential off-grid power generation system: the working principle of the residential off-grid power generation system is very similar to that of the residential grid-connected power generation system. The difference is that the power of the off-grid system is not transmitted to the public grid and is directly consumed by the load. Taking into account the volatility of photovoltaic power generation, such as generating electricity during the day but not at night, good power generation in sunny days or less or no power generation in rainy weather, residential off-grid power generation systems need to be equipped with batteries (groups). The off-grid solar power generation system consists of photovoltaic modules, controllers, inverters and batteries (groups).