With about 300 clear, sunny days in a year, India’s theoretically calculated solar energy incidence on its land area alone, is about 5,000 trillion kilowatt-hours (kWh) per year (or 5 EWh/yr). The solar energy available in a year exceeds the possible energy output of all fossil fuel energy reserves in India. The daily average solar power plant generation capacity over India is 0.25 kWh per m2 of used land area, which is equivalent to about 1,500–2,000 peak (rated) capacity operating hours in a year with the available commercially-proven technologies.
On 16 May 2011, India’s first 5 MW of installed capacity solar power project was registered under the Clean Development Mechanism. The project is in Sivagangai Village,Sivaganga district, Tamil Nadu. In January 2015, the Indian government significantly expanded its solar plans, targeting US$100 billion of investment and 100 GW of solar capacity by 2022.