1. Calculate the installed capacity according to the roof situation

      Under normal circumstances, we estimate how much photovoltaic system can be installed on our own roof, which can be calculated according to the following formula:

      Cement flat roof: installed capacity = 80 watts/square meter × roof area;

      Color steel or tile roof: installed capacity = 100 watts/square meter × roof area;

      2. Photovoltaic system power generation

      For ordinary households, installing a set of 3 to 5kW photovoltaic power generation system can meet daily electricity needs. For example, a 3-kilowatt system in Hebei can generate an average of 12 kilowatts per day; a 5-kilowatt system generates an average of more than 20 kilowatts per day, and can reach 30 degrees or more in good weather, enough for individual household use. Due to different regions, different temperature and light conditions, all power generation will vary.

      3. Understand the local PV subsidy policy

      If you want to install a photovoltaic power generation system, it is essential to understand the subsidy policy, which is related to how much we can get! Photovoltaic subsidies are divided into national subsidies and local subsidies. The national subsidy is 0.42 yuan per kilowatt-hour of electricity. Different local policies vary