In this paper designing, the performance of rooftop solar PV systems is presented. To acquire power from solar PV panels in the case of a rooftop PV system involves a proper selection, design, and determination with the specification of various components that are used in the system. This paper presents an update on a case study undertaken on a rooftop PV system situated in a rural area near a major city Meerut, India. This case study also includes a Life cycle assessment of the rooftop PV system considering the inflation rate and discount rate.