How much money does it take to invest in a photovoltaic solar power plant?

In the future, for example, a 35 square meter roof will allow a 5 kilowatt power plant to be built, with an average annual electricity production of around 5,500 kilowatt hours. The 20-year national subsidy + China Southern Power. The acquisition of the network will generate a total income of 0.9 to 1.2 yuan per kilowatt hour of electricity, and the construction cost of the station will be more than 40,000 yuan. Cost recovery will take 8 years and benefits will take 25-30 years. Typically, house roofs are rated at 10 to 15 kilowatts depending on the area. The construction method can be full payment, bank loan or becoming the local agent of the company to obtain the construction of a power plant at a demonstration site.