Of course, popular scientific knowledge about domestic power plants:
Installed capacity: 5 kilowatts (KW)
Occupied area: about 40 to 50 square meters
< p>Investment amount: about 30,000-50,000 yuanElectricity generation: daily average of about 20 kilowatt hours, 7,300 kilowatt hours per year.
Grid-connected mode: self-consumption for self-consumption and surplus electricity for online use
It is assumed that half of the annual electricity production is intended for self-consumption and the other half is intended for self-consumption. for online use.
Subsidy income: 0.42 yuan/kWh (only national subsidies are considered here) × 7,300 kWh = 3,066 yuan
Savings on electricity bills : 3,650 kWh × 0.56 yuan/kWh = 2,044 yuan
Electricity sales revenue: 3,650 kWh × 0.56 yuan/kWh = 2,044 yuans
Total annual income: 3,066 yuan + 2,044 yuan + 2,044 yuan = 7,154 yuan.
Repayment: 40,000 yuan ÷ 0.7154 million yuan/year = 5.59 years, and the cost is expected to be recovered in 6 years. (Taking into account different light intensities and local subsidies in different places, the cost is usually paid back in 6-10 years)
Accounting: The lifespan of the power plant is generally around 25 years. the cost is refunded, you can use electricity for free and earn money.