A solar system which works with the grid is called on-grid or grid-tied solar system, The main purpose of installing an on-grid solar system is to save electricity bill it does not come with backup, the system does not work when there is a power cut.
The advantage of on-grid solar system is awesome, if you are not using electricity at your home, the power generated from solar system will be fed back to the grid.The state government will give you money for sending electricity to gird.