A solar rooftop system ( Grid Tied System/ On grid System ) typically consists of solar modules, solar inverter(s) and other electrical components such as meter(s), cables etc. Any excess electricity generated is exported to the State electricity grid and owner's account is credited accordingly, subject to prevailing regulatory policies.

Solar modules are made of Silicon wafers, a semiconductor. Photons (particles of light) from the sun's radiation knock out electrons when they fall on the wafers and a Direct Current (DC) electricity flow is established using the semiconductor properties.

The grid connected solar rooftop system does not produce electricity from solar during grid outage.

Solar systems that are equipped with batteries not only provide backup but also generate electricity using solar during grid outage. The same is explained in detail in under OFFGRID.