first of all, you need to know that there are three kinds of distributed photovoltaic power generation, 1. All of them are for personal use (only for personal use, and can't send electricity to the power grid), 2. Self-use surplus electricity is connected to the grid, and 3. All of them are connected to the grid (the electricity can't be used for personal use, and all of them are sent to the power grid). If you adopt the first method of full self-use, then you will save one degree of electricity in the power grid by using one degree of photovoltaic power, that is, you will pay one degree of electricity to the power grid less (whether you use electricity for agriculture, commerce or industry), and at the same time, the state finance will give you a subsidy of 1.42 yuan when the photovoltaic system generates one degree of electricity (full electricity subsidy: that is, all the generated electricity will be subsidized by 1.42 yuan /kwh), which means you can save electricity and get subsidies. If you are the second self-use surplus electricity online mode, this mode is basically the same as the first one, except that the photovoltaic electricity you can't use is sent to the State Grid, and the State Grid will give you a subsidy of about 1.4 yuan per kilowatt hour (desulfurization coal-fired electricity price). If you use the third full access mode, the state finance will give you a subsidy of 1.15 yuan (1.15 yuan in Shandong) when the photovoltaic system sends electricity to the power grid. This mode has nothing to do with the nature of your current power supply. I hope I can help you!