The photovoltaic power stations built now are basically connected to the grid, and the electricity generated during the day can be used for self-use, and will be automatically transmitted to the public power grid when it is not used up. If the electricity generated during the day is not used, it will be automatically transmitted to the public power grid. At night, the photovoltaic power station basically does not generate electricity. At this time, the electricity comes from the public power grid.

For the electricity generated by photovoltaic power plants, the state subsidizes 0.42 yuan/kWh, and so does this country. In addition, you need to look at the local price of desulfurization coal and electricity. This is when you sell electricity to the power bureau, and the power bureau gives you money accordingly; And what is the local electricity consumption? It depends on what kind of electricity is used. Household electricity consumption is different from industrial electricity consumption. Knowing the above data, you can calculate how much the state subsidy+electricity sales are for each power generation of the power station, and how much your electricity bill is. There is a difference between them.

Local subsidies vary from place to place, and many places have local subsidies, which are also based on one-time electricity subsidies, whether for personal use or transmission to the public power grid.

The photovoltaic power station is connected with two meters, one for statistical power generation and the other for statistical power consumption. State subsidies are calculated according to the electricity meter, and the profit from electricity sales is calculated according to the difference between the two meters.