While rooftop solar energy systems are becoming popular in cities such as Coimbatore, it is now entering hill stations too. N.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/rooftop-solar-energy-system-ooty
[2] http://admin.indiaenvironmentportal.org.in/category/author/m-soundariya-preetha
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-chennai
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamil-nadu
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ooty
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solar-energy
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy