The Centre and the Delhi government had announced subsidies and incentives for solar rooftop installations last year.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/6-rwas-delhi-go-green-install-solar-panels-uninterrupted-power-supply
[2] http://admin.indiaenvironmentportal.org.in/category/author/vatsala-shrangi
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-news-analysis-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solar-energy
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/subsidies
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-policy
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy