If you want to apply for residential rooftop solar project and live anywhere in India, you are entitled for a central govt subsidy of Rs 78,000/- if you are planning a project of upto 3kW or more. However, in case your state gives you additional susbsidy, you can get more. For example, a UP resident for a 3kW system can get Rs 78,000/- from MNRE and Rs 30,000/- from UPNEDA (UP govt). So, in total you will get Rs 1,08,000/- for a 3kW system or a system more than 3kW. It is because there is a ceiling for connections after 3kW.