According to Jaideep Mukherji, CEO, Smart Power India, there has been a lot of progress in Bihar both in terms of connection and hours of electricity supply to households
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/solar-electricity-stiff-competition-cheaper-grid-power-bihar
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-standard-new-delhi
[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/bihar
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rural-electrification
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy