what is the return on investment (ROI)of solar PV grid power ?

For example: Photovoltaic power generation project of a farm 80KWP

The project scale is 80.2kwp

The annual average power generation capacity is 104,200 KWH,

The average annual earnings are 148,000 yuan

Total revenue in 25 years: 3.7 million yuan

Return on investment time: 3.5 years

Save 34.4 tons of standard coal annually

The annual carbon dioxide reduction is 89.5 tons