List some advantages of solar cells.

(N/A) The principal advantages of solar cells are as follows:
$1$. They have no moving parts,which reduces wear and tear.
$2$. They require very little maintenance.
$3$. They work satisfactorily without the use of any focusing device.
$4$. They can be set up in remote,inaccessible,or sparsely populated areas where laying power transmission lines is expensive and not commercially viable.