It is stipulated in this country's documents that if the surplus electricity generated by household photovoltaic power is transmitted to the State Grid, the subsidy per kilowatt-hour will be 1.42 yuan/kilowatt-hour.

Precautions for personal installation of photovoltaic power generation:

1. The grid-connected voltage of distributed photovoltaic system is mainly determined by the installed capacity of the system, and the specific grid-connected voltage needs to be determined according to the approval of the grid company's access system. Generally, AC221V is selected for household use, and AC381V or 11kV can be selected for commercial use.

2. The installation inclination of photovoltaic array is generally determined by the latitude of the installation site.

3. As the main factor affecting photovoltaic power generation is sunshine, the modules should be installed in the most sunny direction, and different installation angles also have an impact on the power generation of photovoltaic modules.