As on 31.07.2017, the cumulative Solar Energy capacity installed, as on 31.07.2017, is 13652 MW while the same at the end of 2014-15 was 3743.97 MW.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/solar-energy-installed-capacity-touched-13652-mw
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/free-press-journal
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solar-energy
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-new-and-renewable-energy
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/power-transmission
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy