The cost of photovoltaics has fallen and market parity has arrived, so it is no longer like before when a watt cost more than 20 yuan. Nowadays, the average installation price of a power plant is about 4-5 yuan per watt, and a 10 kW power plant costs only 40,000 yuan.
Of course, you have to choose a large, reliable brand, and make sure that the components/inverters/supports, etc. are suitable. are all products from major manufacturers, so as to guarantee the lifespan of the photovoltaic system. the power plant can reach 30 years.
Of course, the income from domestic photovoltaic energy production includes three parts:
1. Earn money from subsidies: national subsidy 0.08 yuan/kWh + provincial subsidy + city and county subsidies. (slightly different depending on location), whether you use it yourself or sell it, as long as you produce electricityThere will be subsidies.
2. Save on electricity bills: Use your own electricity and don't have to pay electricity bills, which equals saving money.
3. Make money by selling electricity: Unused electricity is sold to the state, and the electricity price is about 0.56 yuan/kWh, based on the reference price of electricity. electricity from local coal desulfurization units. (Electricity prices vary slightly from location to location).
IV. Calculation of ROI
Taking Zhejiang as an example, installing a 10 kW household power station would cost about 40,000 yuan based on the market price. , can generate 11,500 kw/h per year, calculated as 30% for self-consumption and 70% sold to the state grid:
Subsidy income: 11,500*0.08=920 yuan (excluding provincial and prefectural levels). subsidies)< /p>
Income fromElectricity bill savings: 11,500*30%*0.52 (electricity bill)=1,794 yuan
Revenue from electricity sales: 11,500*70%*0 ,4153=3343 yuan< /p>
Complete In total, one year's income: 920+1794+3343=6057 yuan
It takes almost 7 years to recover the capital. The average operating life of a photovoltaic plant is 25 years. years, meaning the remaining time is pure income.
If you are still unsure how much income can be generated by installing a PV plant, you can download a Carbon Income Synergy app which can give you a detailed estimate of the installation cost. a photovoltaic plant and what your specific income will be. You can find out.
Photovoltaic revenue calculation interface
Source of information: Carbon-silver photovoltaics
As of August 2021, the price will be 4 to 5 yuan per meter.
The installation cost of photovoltaic power generation is mainly the equipment cost, including: photovoltaic modules account for about 49% of the total investment, inverters and other equipment electricity accounts for around 10%, cables and The sections each account for around 10% and different photovoltaic installation companies have their own pricing standards.
Installation capacity varies greatly depending on component capacity and installation angle used. Generally speaking, each kilowatt of photovoltaic power generation system can generate four kilowatt hours of electricity per day and requires 10 square meters of installation area. If the installation scale is 3-5kW, the investment cost will be about 30,000-50,000 yuan.
Solar photovoltaic energy production issues requiring special attentione
For photovoltaic power generation systems that have been operating for a long time, the impact of dust accumulation on the panels cannot be underestimated. The dust on the surface of the panel has the function of reflecting, scattering and absorbing solar radiation, which can reduce the transmission of the sun, causing the panel to receive less solar radiation and reduce the output power. Its effect is proportional to the accumulated thickness. dust.
At the same time, other parts of the photovoltaic panel will also be corroded by wet dust, such as joints, brackets and other parts. Most materials are various types of metals. Corrosion can easily result. damage, weakened security and other issues, which may be damaged by natural factors such as strong winds and earthquakes, thereby reducing the lifespan of photo panels.oltaic.