With about 300 clear, sunny days in a year, India's theoretical solar power reception, on only its land area, is about 5,000 trillion kilowatt-hours (kWh) per year (or 5 EWh/yr).[7][8][9] The daily average solar energy incident over India varies from 4 to 7 kWh/m2 with about 1,500–2,000 sunshine hours per year (depending upon location), which is far more than current total energy consumption. For example, assuming the efficiency of PV modules were as low as 10%, this would still be a thousand times greater than the domestic electricity demand projected for 2015.[7][10]
The amount of solar energy produced in India in 2007 was less than 1% of the total energy demand.[11] The grid-connected solar power as of December 2010 was merely 10 MW.[12]Government-funded solar energy in India only accounted for approximately 6.4 MW-yrs of power as of 2005.[11] However, India is ranked number one in terms of solar energy production per watt installed, with an insolation of 1,700 to 1,900 kilowatt hours per kilowatt peak (kWh/KWp).[13]25.1 MW was added in 2010 and 468.3 MW in 2011.[14] By end September 2014, the installed grid connected solar power had increased to 2,766 MW,[15] and India expects to install an additional 10,000 MW by 2017, and a total of 20,000 MW by 2022
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