Also known as standalone system is the most common systems in homes across developing countries. This type of system is designed to serve load independently by supplying all the power required by load.
In developing countries, where power supplies are inadequate or unpredictable this system could bridge between long and frequent power cuts and inconvenience.
It is commonly used as a standby source of power for homes and small businesses to supply power for important load.
Cost and efficiency makes off-grid system expensive as compared with grid-tied.
It is simple as it could be installed anywhere without any form of complications from authorities.