In a solar rooftop system,the solar panels are installed on the roof of any residential, commercial, institutional and industrial buildings. This can be of two types
(i) Solar Rooftop System with storage facility using battery – The solar electricity is stored in the battery and can be utilized during night also when the sun is not available
(ii) Grid Connected Solar Roof top System – The DC power generated from SPV panel is converted to AC power using power conditioning unit and is fed to the grid either of 33kV/11 kV three phase lines or of 440/220 Volt three/single phase line depending on the capacity of the system installed at institution/commercial establishment or residential complex and the regulatory framework specified for respective States. – These systems generate power during the day time which is utilized fully by powering captive loads and feed excess power to the grid as long as grid is available.In case,where solar power is not sufficient due to cloud cover etc., the captive loads are served by drawing power from the grid.