The total cost is nearly 50,000 yuan.
Take the example of a 5 kilowatt photovoltaic plant built at home. The installation must determine whether there is sufficient roof space. The power plant requires approximately 10 square meters of panels. per kilowatt, and 5 kilowatts requires 50 square meters of rice. Based on the current market price for building a home photovoltaic power station, the total cost of various expenses is on average about 10 yuan per watt.
1. Battery panels: the best material on the market is 4 yuan/watt, 5 kilowatt ≈ 20,000 yuan
2. Installation material cost (city): aluminum alloy bracket ≈5,000 yuan, ordinary steel brackets ≈3,000 yuan (if the roofs in rural areas are mostly pointed, brackets are not needed, which will save money)
3. Supporting instruments:
Mixer. bunit ≈ 400 -500 yuan (collecting current from all battery panels, plus lightning protection function. Currently, most of them do not configure it separately, but put this function on other instruments)< /p>
Inverter (good quality)≈10,000 yuan (transforming the DC power generated by the battery panel into AC power suitable for household appliances, as well as short circuit prevention, communication and to other functions)
4. ≈ 8,000 yuan
Everywhere The electricity supply company's network connection service is free.
The total cost is nearly 50,000 yuan.
The income is calculated as follows:
If there are approximately 1,300 effective hours of sunshine per year and the installed power is 3 kilowatts, then the annual production of electricity is 3 kilowatts * 1,300 hours = 3,900 kilowatt hours.
If the price of subsidized electricitylocally is calculated at 0.5 yuan/watt, then the annual income is 3,900 kilowatt hours * 0.5 yuan/watt = 1,800,000 yuan. Regardless of the degradation of the battery, the investment cost of 15,700 yuan can be recovered in 8.7 years, and then it will be a net benefit.
What also needs to be considered here is the attenuation of the battery components. Another thing to consider is that the national grants will last for 20 years. Local subsidies from provinces and cities vary from region to region. five years, and some subsidize. Three years later, there are still a lot of changes.
Home solar power systems can be large or small. For example, the lighting power is generally a small solar power generation system (400-600 watts solar power generation panel, 4 batteries, 2 GW). inverter Around 8,000 yuan to 12,000 yuan.) If you have an air conditionerhome, a 5 kilowatt inverter will do the trick. Large-scale solar power systems have more stable power consumption and cost more. It depends on how much power you are counting on.