Hello. I don't know how many KW of photovoltaic systems you invested 300,000 yuan to install Foshan Dejiu will give you an example:
If you invest 300,000 yuan, if it is 8.5 yuan per watt, that's about 35 KW. ;
35 kW can generate at least 140 kWh per day, then the annual electricity production is 140 kWh * 365 days = 51,100 kWh/year
If the price of electricity your household electricity is 0.56 yuan; /kWh, adding the national subsidy of 0.42 yuan/kWh, the annual income is 51100*0.98=50078 yuan
Then you can recover all your investment within 300000/ 50078=6 years.
If it is a commercial electricity price, if it is calculated as 0.98 yuan per unit, then the income is 51,100*(0.98+0 .42)=71540 yuan
Then you can calculate it to 300000/71540=4 years. It can be recovered in about 2 months.