As rooftop solar installations under the PM Surya Ghar: Muft Bijli Yojana reach 1 million nationwide, concerns have arisen about the lack of quality checks for the components and the absence of standardization. Several new installers with little or no experience have entered the rooftop solar market to cash in on the increasing consumer demand. Industry insiders say the quality of the installations is being compromised in a rush to meet targets in some states.