Researchers are exploring various methods to improve the efficiency of multilevel inverters, including selective harmonic elimination and modulation optimization techniques. Different algorithms, such as the Sea-Horse Algorithm and ant lion optimization, are being used to minimize total harmonic distortion and reduce switch count. The approaches being investigated vary, with some focusing on specific types of inverters, such as T-type or cascaded H bridge inverters, while others propose novel control methods or review existing technologies for grid-interfaced solar PV systems.