Integration of power generated through solar photovoltaic (PV) systems with the utility grid is expanding at a rapid pace. Since the electricity produced by PV systems varies with the weather condition, this may substantially disrupt the stability of a weak utility grid. Grid-tied photovoltaic (PV) inverters are needed to include harmonics mitigation control to minimise harmonics distortion on the output current produced by the effect of grid background harmonics. One of the criteria for a converter for such applications is to have a reduced number of conversion steps and offer isolation. Z- source inverter (ZSI) architecture is possible to eliminate several stages and accomplish voltage boost and DC-AC power conversion in a single stage. The usage of passive components also provides an opportunity to incorporate energy storage systems (ESS) into the grid. The functioning of a Z-source inverter (ZSI) combined with a split main isolated battery charger for DC charging of electric vehicles (EV) batteries. The ZSI architecture utilises two capacitors and two inductors to raise the input DC voltage to meet the inverter side AC output voltage requirements. The functioning of a ZSI relies heavily on the passive components. It offers an opportunity to incorporate energy storage devices into such a system. The criteria established by the utility is fulfilled by the ZSI even during changing input circumstances via control of shoot-through duty ratio. Various Z source inverter topologies are reviewed in this article and contrasted in various ways, such as switches, switching procedures, and modulation methods. The difficulties connected with dynamic variations in load may be addressed by the appropriate design of the closed-loop system. Duty ratio and modulation index are the two essential factors that need to be designed for attaining the buck-boost characteristic of ZSI.