A Rooftop photovoltaic power station is a system which uses one or more photovoltaic panels, installed on rooftops of residential or commercial buildings, to convert sunlight into electricity. The various components in a rooftop photovoltaic power station include photovoltaic modules, mounting systems, cables, Solar inverters and other electrical accessories. Shading from adjacent buildings Shading from overhanging vegetation Roof slope Roof aspect Shading from adjacent buildings and trees