In photovoltaic applications, transformer-less inverters are used mostly because of their advantages like higher efficiency, reduced size, and lower cost. Unfortunately, in the absence of transformer, leakage current flows in the circuit. For safety requirements, in a transformer-less inverter, the leakage current should be eliminated. So, the leakage current should be eliminated with the lower number of components used in the circuit, thus reducing the cost and the conduction losses in the circuit. In this brief, discussion of different types of topologies used to reduce or eliminate the leakage current. Multilevel inverters are used in this because of their advantages like dv/dt, low THD output, reduced electromagnetic interference, low switching frequency, etc. Photovoltaic panel is low voltage; so, voltage balancing and voltage boosting circuit are used in a lot of topologies so that there will be no requirement of using extra circuit for boosting the voltage.