There are two main types of solar power generation: one is photovoltaic power generation (photovoltaic solar power generation) and the other is solar thermal power generation (photovoltaic solar power generation) Solar Thermal).
①Solar photovoltaic power generation - is a method of electricity generation that directly converts solar energy into electrical energy. It includes four forms: photovoltaic power generation, photochemical power generation, light induction power generation, and photobiological energy generation. It includes: electrochemical photovoltaic cells, photoelectrolysis cells and photocatalytic cells.
②Solar thermal power generation: first converts solar energy into thermal energy, and then converts thermal energy into electrical energy. It has two conversion methods:
One is to convertdirectly ir thermal solar energy. in electrical energy. Another way is to use solar thermal energy to drive a generator to produce electricity via a heat engine.
If you can, adopt it! THANKS. . . Haha
First of all, we need to know the principles of grid-connected photovoltaic power generation systems and what equipment is needed.
1. Working principle of photovoltaic power generation system:
High-performance solar cell components are installed on the roof using brackets and are connected in series. and at the same time to form solar energy. The solar cell array absorbs sunlight and generates direct current, which is converted to alternating current for home use via the photovoltaic inverter and uploaded to the power grid.
2. System compositionme:
Mainly includes: photovoltaic modules, inverter, bracket, DC cable, AC cable, subsidized meter, two-way electricity meter
3. Market price:
The market price of photovoltaic systems is generally 8 to 12 yuan per watt. The cost of installing a 5 kW solar power generation system in an average household is around 40,000 to 60,000 yuan.
4. Income from domestic photovoltaic power generation includes three parts:
1. Earn money from subsidies: national subsidy of 0.42 yuan/kWh + province. subsidies + city and county subsidies Subsidies (slightly different depending on location), whether you use it yourself or sell it, as long as you produce electricity, you will be subsidized.
2. Save on your electricity bills: you can generate electricity for yourown use without having to pay electricity bills, which is equivalent to earning money.
3. Earn money by selling electricity: Unused electricity is sold to the state and the electricity price is based on the electricity benchmark price of local coal desulfurization units, i.e. approximately 0.56 yuan/kWh. (Electricity prices vary slightly from location to location).
5. Calculation of return on investment
Taking the Shandong category III area as an example, to install a 5KW domestic power plant, the investment will be around 40,000 yuan depending on the price of the market. It can generate an average of 20 kW/h per day and 7,300 kW/h per year. It is calculated based on 30% self-use and 70% sold to State Grid:
Subsidy income: 7,300*. 0.42=3,066 yuan (excluding provincial and prefecture-level subsidies)
Income from savingsies on electricity bill: 7,300*30%*0.52 (electricity bill)=1,138.8 yuan
Electricity sales income: 7,200*70%*0 .35 = 1,764 yuan
Total income in one year: 3,066 + 1,138.8 + 1,764 = 5,968.8 yuan
Almost 6 years Time may be profitable. The average operating life of a photovoltaic plant is 25 years, which is equivalent to the net income for the next 19 years.