IRENA's SolarCity is a web-based simulator designed to assist households, businesses, and municipal authorities in assessing the potential for rooftop solar photovoltaic (PV) systems. The simulator allows homes and businesses to calculate potential savings from rooftop solar PV, considering various financing models. 

For municipal authorities, it aids in evaluating policy incentives' impact on the rooftop solar PV market. The simulator, part of IRENA's Global Atlas for Renewable Energy, combines high-resolution 3D building footprints with solar irradiation data. The tool showcases its adaptability for global use, even in areas with high but underexplored solar potential.

Read the original source.