If you want to undertake rooftop solar business, you need to register with the discom (electricity distribution company) where you want to operate. As per the PM Surya Ghar scheme norms, only the registered solar vendors can undertake residential rooftop solar installations. The consumers can get subsidies for rooftop solar projects under the PM Surya Ghar scheme only if they get their installations done by registered vendors only. The National Rooftop Portal maintains a list of all the registered solar vendors who are undertaking these installations. For getting registered with the local discom, these companies also need to pay annual fees to them to get their registrations done.